Battery case and battery

Abstract

The utility model provides a kind of battery box and battery, battery box includes bottom plate and two side plates, bottom plate has first runner and the first connecting rib being arranged in the inside of first runner, first connecting rib separates first runner into multiple independent first sub runner, the inner top surface of first runner has top concave-convex surface;Respectively be arranged in the both ends of bottom plate along the width direction of bottom plate, side plate has second runner and the second connecting rib being arranged in the inside of second runner, first runner is communicated with second runner, second connecting rib separates second runner into multiple independent second sub runner, the inner wall surface of two side plates respectively has side concave-convex surface.The battery box of the application sets top concave-convex surface in the inside of first runner, and sets side concave-convex surface in the inside of second runner, increases the contact area between liquid coolant and runner inner wall, to improve the heat dissipation efficiency of battery box, to solve the problem of low heat dissipation efficiency in the battery box in prior art.

Description

Technical Field

[0001] This application relates to the field of battery-related technology, and more specifically, to a battery housing and a battery. Background Technology

[0002] In existing battery enclosure technologies, the design of liquid cooling plate channels is generally limited by the channel space, preventing an effective increase in the heat exchange area between the coolant and the cooling plate. This design limitation directly affects the coolant's ability to remove heat generated by the battery cells, potentially leading to excessively high cell temperatures and impacting battery performance and lifespan. Furthermore, the internal structure of traditional liquid cooling plate channels is often relatively simple, resulting in insufficient cooling efficiency.

[0003] While current liquid cooling plate designs on the market have been optimized in some aspects, such as employing multi-channel flow paths, there are few innovative improvements in specific structural details. This situation means that even with an increase in the number of flow channels, the heat exchange efficiency between the coolant and the cooling plate has not been significantly improved. This is especially true under the operating conditions of high-power output and high heat load of batteries, where cell temperature control becomes a major challenge.

[0004] As can be seen from the above, there are obvious defects in the liquid cooling plate flow channel design of the existing battery box, resulting in low heat dissipation efficiency of the battery box. Utility Model Content

[0005] The main objective of this invention is to provide a battery housing and a battery to solve the problem of low heat dissipation efficiency in existing battery housings.

[0006] To achieve the above objectives, according to one aspect of the present invention, a battery housing is provided. The battery housing includes a base plate, the base plate having a first flow channel and a first connecting rib disposed inside the first flow channel. The first connecting rib divides the first flow channel into multiple independent first sub-flow channels along the width direction of the base plate. The inner top surface of the first flow channel has a top concave-convex surface disposed along the height direction of the base plate. Two side plates are respectively disposed at both ends of the base plate along the width direction of the base plate. The side plates have a second flow channel and a second connecting rib disposed inside the second flow channel. The first flow channel communicates with the second flow channel. The second connecting rib divides the second flow channel into multiple independent second sub-flow channels along the height direction of the base plate. The inner wall surfaces of the second flow channels of the two side plates that are close to each other have side concave-convex surfaces disposed along the width direction of the base plate.

[0007] Furthermore, the inner top surface of the first flow channel has multiple protrusions that rise toward the inner bottom surface of the first flow channel. The multiple protrusions are spaced apart along the width direction of the bottom plate, and the outer surfaces of the multiple protrusions cooperate to form a top concave-convex surface on the inner top surface of the first flow channel.

[0008] Furthermore, the inner top surface of the first flow channel has a plurality of first grooves disposed facing away from the inner bottom surface of the first flow channel. The plurality of first grooves are spaced apart along the width direction of the bottom plate, and the groove wall surfaces of the plurality of first grooves cooperate to form a top concave-convex surface on the inner top surface of the first flow channel.

[0009] Furthermore, along the width direction of the base plate, multiple raised structures are formed on the inner wall surfaces of the second flow channels of the two side plates that are close to each other, and the multiple raised structures are spaced apart along the height direction of the base plate. The outer surfaces of the multiple raised structures cooperate to form a side concave-convex surface on the inner wall surfaces of the second flow channels that are close to each other; or, second grooves are formed on the inner wall surfaces of the second flow channels of the two side plates that are close to each other, and multiple second grooves are spaced apart along the height direction of the base plate. The inner wall surfaces of the multiple second grooves cooperate to form a side concave-convex surface on the inner wall surfaces of the second flow channels that are close to each other.

[0010] Furthermore, along the width direction of the base plate, the end of the second connecting rib inside the two side plates that is close to each other is the first end, and the end that is far from each other is the second end; along the height direction of the base plate, the distance between the second end and the base plate is greater than the distance between the first end and the base plate.

[0011] Furthermore, the second connecting ribs inside the two side plates are symmetrically arranged about the bottom plate along the width direction of the bottom plate.

[0012] Furthermore, the top end of the first connecting rib is connected to the inner top surface of the first flow channel, and the bottom end of the first connecting rib is connected to the inner bottom surface of the first flow channel; the first connecting rib includes at least one first rib, a second rib, and at least one third rib arranged sequentially along the width direction of the base plate, and the distance between the top ends of the first rib and the third rib is less than the distance between the bottom ends of the first rib and the third rib along the width direction of the base plate; the extension direction of the second rib is perpendicular to the height direction of the base plate.

[0013] Furthermore, the first and third reinforcing bars are symmetrically arranged on both sides of the second reinforcing bar.

[0014] Furthermore, the angle between the extension direction of the first rib and the inner bottom surface of the first flow channel is not greater than 45°; and / or the angle between the extension direction of the third rib and the inner bottom surface of the first flow channel is not greater than 45°.

[0015] Furthermore, along the width direction of the base plate, the surfaces of the first and third ribs that are far apart from each other have rib protrusions arranged in a direction that is far apart from each other, and the outer surface of the rib protrusions is formed as a rib surface.

[0016] Furthermore, the base plate and the two side plates cooperate to form a U-shaped structure. Along the length of the base plate, the two ends of the U-shaped structure are specifically converging cavities, which are connected to the first flow channel and the second flow channel. The battery box also includes a blocking strip. The converging cavity has an end opening on the side opposite to the first flow channel and the second flow channel, and the blocking strip is detachably installed at the end opening. And / or the battery box also includes a water inlet and a water outlet provided on the top surface of the base plate. The water inlet and the water outlet are connected to the converging cavity. Along the length of the base plate, the water inlet and the water outlet are provided at the same end of the base plate; or the water inlet and the water outlet are respectively provided at both ends of the base plate.

[0017] According to another aspect of the present invention, a battery is provided, the battery comprising the battery housing described above.

[0018] By applying the technical solution of this utility model, the battery box of this application adopts a top concave-convex surface provided inside the first flow channel and a side concave-convex surface provided inside the second flow channel, thereby increasing the contact area between the liquid coolant and the inner wall of the flow channel, and thus improving the heat dissipation efficiency of the battery box.

[0019] This application adopts a top concave-convex surface formed on the top surface of the first flow channel and a side concave-convex surface formed on the inner wall surfaces of the second flow channel that are close to each other, so as to ensure that the side close to the cell is set as a concave-convex surface structure. This setting is conducive to improving the heat exchange efficiency between the liquid coolant and the cell, while not destroying the heat preservation effect of the battery box, which is conducive to ensuring the stability of battery performance.

[0020] This application employs a first connecting rib inside the first flow channel and a second connecting rib inside the second flow channel. By setting the first and second connecting ribs, the contact area with the liquid coolant is further increased, thereby improving the heat dissipation efficiency of the battery box. At the same time, the structural arrangement of the first and second connecting ribs increases the structural strength of the bottom plate and side plate, thereby improving the structural strength of the battery box. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0022] Figure 1 A schematic diagram of the battery box and battery installation structure of this utility model is shown.

[0023] Figure 2 An exploded view of the battery housing of this utility model is shown;

[0024] Figure 3 A top view of the battery housing of this utility model is shown;

[0025] Figure 4It shows Figure 3 Sectional view along axis AA;

[0026] Figure 5 It shows Figure 4 Enlarged view of point B in the image.

[0027] The above figures include the following reference numerals:

[0028] 10. Base plate; 101. Top concave-convex surface; 110. First flow channel; 111. First sub-flow channel; 120. First connecting rib; 121. First rib; 122. Second rib; 123. Third rib; 124. Rib protrusion; 20. Side plate; 201. Side concave-convex surface; 210. Second flow channel; 211. Second sub-flow channel; 220. Second connecting rib; 30. Water inlet; 40. Water outlet; 50. Battery cell; 60. Plug. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0031] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0032] To address the problem of low heat dissipation efficiency in existing battery housings, this application provides a battery.

[0033] The battery in this application is a secondary battery.

[0034] Specifically, such as Figure 1 As shown, the battery includes a battery housing and a battery cell 50 disposed inside the battery housing. The battery cell 50 is supported on the top surface of the bottom plate 10 of the battery housing and dissipates heat through heat exchange with the liquid coolant circulating inside the battery housing. The battery housing of this application improves the heat exchange efficiency between the liquid coolant and the battery cell 50 by optimizing the internal structure of the bottom plate 10 and the side plate 20.

[0035] like Figures 1 to 5As shown, the battery housing includes a base plate 10 and two side plates 20, which are respectively disposed at both ends of the base plate 10 along the width direction of the base plate 10. The two side plates 20 and the base plate 10 form an installation space for accommodating the battery cell 50. After the battery cell 50 is installed into the installation space, the bottom surface of the battery cell 50 is supported on the top surface of the base plate 10, and the two sides of the battery cell 50 are in contact with the surfaces of the two side plates 20 that are close to each other.

[0036] The length direction of the base plate 10 is Figure 1 The width direction of the base plate 10 is shown in the X direction. Figure 1 As shown in the Y direction, the height direction of the base plate 10 is... Figure 1 The Z direction is shown.

[0037] In this embodiment, the base plate 10 has a first flow channel 110 and the side plate 20 has a second flow channel 210. The first flow channel 110 and the second flow channel 210 are connected to supply liquid coolant.

[0038] Specifically, the first flow channel 110 has an inner top surface close to the battery cell 50 and an inner bottom surface away from the battery cell 50. The inner top surface of the first flow channel 110 has a top concave-convex surface 101 arranged along the height direction of the base plate 10. When the liquid coolant flows inside the first flow channel 110, the structure of the top concave-convex surface 101 increases the contact area between the liquid coolant and the inner top surface of the first flow channel 110 compared to the planar structure. The inner walls of the second flow channels 210 of the two side plates 20 that are close to each other have side concave-convex surfaces 201 arranged along the width direction of the base plate 10. When the liquid coolant flows inside the second flow channel 210, the structure of the side concave-convex surfaces 201 increases the contact area between the liquid coolant and the inner surface of the second flow channel 210 compared to the planar structure.

[0039] The concave and convex directions of the top concave and convex surface 101 are arranged along the height direction of the base plate 10, that is, the concave and convex surface is arranged towards the internal cavity of the first flow channel 110 for contact with the liquid coolant; the concave and convex directions of the side concave and convex surface 201 are arranged along the width direction of the base plate 10, that is, the concave and convex surface is arranged towards the internal cavity of the second flow channel 210 for contact with the liquid coolant.

[0040] The battery housing of this application adopts a top concave-convex surface 101 provided inside the first flow channel 110 and a side concave-convex surface 201 provided inside the second flow channel 210, thereby increasing the contact area between the liquid coolant and the inner wall of the flow channel, and thus improving the heat dissipation efficiency of the battery housing.

[0041] In this embodiment, the inner top surface of the first flow channel 110 is formed as a top concave-convex surface 101, and the adjacent inner wall surfaces of the second flow channel 210 are formed as side concave-convex surfaces 201. This ensures that the side closest to the battery cell 50 is configured with a concave-convex surface structure. This configuration is beneficial for improving the heat exchange efficiency between the liquid coolant and the battery cell 50, while not compromising the insulation effect of the battery housing, thus ensuring the stability of battery performance. Furthermore, to enhance the insulation effect of the battery housing, the battery housing of this application also includes an insulation coating disposed on the surface of the bottom plate 10 facing away from the battery cell 50, which provides insulation.

[0042] The top concave-convex surface 101 and the side concave-convex surface 201 of this application are both non-planar structures, thus forming a turbulence structure. By increasing the friction and disturbance between the liquid coolant and the concave-convex surface, the uniform transfer and absorption of heat can be promoted, thereby improving the heat dissipation efficiency of the battery box.

[0043] In this embodiment, the following implementation is provided depending on the different formation structures of the top concave and convex surface 101.

[0044] In one specific implementation of this embodiment, such as Figure 4 and Figure 5 As shown, the inner top surface of the first flow channel 110 has a plurality of protrusions that rise toward the inner bottom surface of the first flow channel 110. The plurality of protrusions are spaced apart along the width direction of the bottom plate 10, and the outer surfaces of the plurality of protrusions cooperate to form a top concave-convex surface 101 on the inner top surface of the first flow channel 110.

[0045] The structure of forming the top concave-convex surface 101 is achieved by forming a convex surface on the outer surface of the raised portion provided towards the interior of the first flow channel 110, and forming a concave surface on the surface of the area between two adjacent raised portions provided along the width direction of the bottom plate 10.

[0046] Specifically, the outer surface of the protrusion is formed into an arc-shaped structure, and the protrusion is a strip-shaped structure extending along the length direction of the base plate 10.

[0047] In another specific embodiment not shown in this example, the inner top surface of the first flow channel 110 has a plurality of first grooves disposed facing away from the inner bottom surface of the first flow channel 110. The plurality of first grooves are spaced apart along the width direction of the bottom plate 10, and the groove wall surfaces of the plurality of first grooves cooperate to form a top concave-convex surface 101 on the inner top surface of the first flow channel 110.

[0048] The structure of the top concave-convex surface 101 is achieved by forming a concave surface on the groove wall of the first groove provided on one side of the battery cell 50, and forming a convex surface on the surface of the area between two adjacent first grooves along the width direction of the bottom plate 10.

[0049] Specifically, the groove wall of the first groove is formed into an arc-shaped structure, and the first groove is a strip-shaped structure extending along the length direction of the base plate 10.

[0050] In another specific embodiment not shown in this example, the inner top surface of the first flow channel 110 has a first groove with alternating protrusions along the width direction of the base plate 10. The outer surface of the protrusion is formed as a convex surface, and the groove wall surface of the first groove is formed as a concave surface. The alternating protrusions and the first groove cooperate to form a top concave-convex surface 101 on the inner top surface of the first flow channel 110.

[0051] Specifically, the outer surface of the protrusion is formed into an arc-shaped structure, and the protrusion is a strip-shaped structure extending along the length direction of the base plate 10. The groove wall of the first groove is formed into an arc-shaped structure, and the first groove is a strip-shaped structure extending along the length direction of the base plate 10.

[0052] In this embodiment, the formation of the two side concave and convex surfaces 201 provides the following implementation.

[0053] In one specific implementation of this embodiment, such as Figure 4 and Figure 5 As shown, along the width direction of the base plate 10, multiple protrusions are formed on the inner wall surfaces of the second flow channels 210 of the two side plates 20 that are close to each other, and the multiple protrusions are spaced apart along the height direction of the base plate 10. The outer surfaces of the multiple protrusions cooperate to form a side concave-convex surface 201 on the inner wall surfaces of the second flow channels 210 that are close to each other.

[0054] The structure of forming the side concave-convex surface 201 is achieved by forming a convex surface on the outer surface of the raised structure provided towards the interior of the second flow channel 210, and forming a concave surface on the surface of the area between two adjacent raised structures provided along the height direction of the base plate 10.

[0055] Specifically, the outer surface of the protruding structure is formed into an arc shape, and the protruding structure is a strip-shaped structure extending along the length direction of the base plate 10.

[0056] In another specific embodiment not shown in this example, along the width direction of the base plate 10, the inner wall surfaces of the second flow channels 210 of the two side plates 20 that are close to each other are formed with second grooves that are arranged in a direction that are close to each other. A plurality of second grooves are spaced apart along the height direction of the base plate 10. The inner wall surfaces of the plurality of second grooves cooperate to form a side concave-convex surface 201 on the inner wall surfaces of the second flow channels 210 that are close to each other.

[0057] The structure of forming the side concave-convex surface 201 is achieved by forming a concave surface on the groove wall of the second groove provided on one side of the battery cell 50, and forming a convex surface on the surface of the area between two adjacent second grooves along the height direction of the base plate 10.

[0058] Specifically, the groove wall of the second groove is formed into an arc-shaped structure, and the second groove is a strip-shaped structure extending along the length of the base plate 10.

[0059] like Figure 4 and Figure 5 As shown, the base plate 10 also has a first connecting rib 120 disposed inside the first flow channel 110. The first connecting rib 120 divides the first flow channel 110 into multiple independent first sub-flow channels 111 along the width direction of the base plate 10. The multiple first sub-flow channels 111 are arranged sequentially along the width direction of the base plate 10. The first sub-flow channels 111 are formed as flow channels for liquid coolant to flow along the length direction of the base plate 10. The side plate 20 also has a second connecting rib 220 disposed inside the second flow channel 210. The second connecting rib 220 divides the second flow channel 210 into multiple independent second sub-flow channels 211 along the height direction of the base plate 10.

[0060] Each first sub-channel 111 and each second sub-channel 211 extends along the length of the base plate 10. The multiple first sub-channels 111 and multiple second sub-channels 211 are used to plan the flow of liquid coolant, thereby improving the flow efficiency of liquid coolant.

[0061] This application employs a first connecting rib 120 inside the first flow channel 110 and a second connecting rib 220 inside the second flow channel 210. By setting the first connecting rib 120 and the second connecting rib 220, the path planning of the liquid coolant flowing inside the first flow channel 110 and the second flow channel 210 is realized, which further improves the flow efficiency and heat exchange efficiency of the liquid coolant, improves the heat dissipation efficiency of the battery box, and ensures the stability of battery performance.

[0062] The first connecting rib 120 and the second connecting rib 220 are provided in multiples. The top end of each first connecting rib 120 is connected to the inner top surface of the first flow channel 110, and the bottom end of each first connecting rib 120 is connected to the inner bottom surface of the first flow channel 110. The first end of each second connecting rib 220 is connected to the inner surface of the second flow channel 210 near the battery cell 50, and the second end of each second connecting rib 220 is connected to the inner surface of the second flow channel 210 away from the battery cell 50. Correspondingly, along the width direction of the bottom plate 10, the ends of the second connecting ribs 220 inside the two side plates 20 that are close to each other are the first ends, and the ends that are far apart from each other are the second ends.

[0063] Specifically, by setting the first connecting rib 120 and the second connecting rib 220, the contact area with the liquid coolant is further increased, thereby improving the heat dissipation efficiency of the battery box. At the same time, the structural setting of the first connecting rib 120 and the second connecting rib 220 increases the structural strength of the bottom plate 10 and the side plate 20, thereby improving the structural strength of the battery box.

[0064] This application increases the contact area between the liquid coolant and the battery box by using the first connecting rib 120 and the second connecting rib 220 in conjunction with the top concave-convex surface 101 and the side concave-convex surface 201, thereby improving the heat exchange efficiency.

[0065] In this embodiment, along the height direction of the base plate 10, the distance between the second end and the base plate 10 is greater than the distance between the first end and the base plate 10, so that the second connecting rib 220 is formed as a diagonal rib. By setting the second connecting rib 220 as a diagonal rib, compared with the connecting ribs set perpendicular to the side plate 20, the second connecting rib 220 of this application further increases the contact area with the liquid coolant, thereby improving the heat exchange efficiency of the structure.

[0066] In this embodiment, the second connecting ribs 220 inside the two side plates 20 are symmetrically arranged about the bottom plate 10 along the width direction of the bottom plate 10 to ensure that the heat exchange efficiency of the liquid coolant inside the two side plates 20 is the same as that of the battery cell 50, thereby ensuring that the temperature on both sides of the battery cell 50 is consistent, so as to avoid the problem of temperature difference affecting the battery efficiency.

[0067] like Figure 4 and Figure 5 As shown, the first connecting rib 120 includes at least one first rib 121, a second rib 122 and at least one third rib 123 arranged sequentially along the width direction of the base plate 10. The extension direction of the second rib 122 is perpendicular to the height direction of the base plate 10.

[0068] The first rib 121 and the third rib 123 are symmetrically arranged on both sides of the second rib 122 to ensure that the liquid coolant is evenly distributed inside the first flow channel 110 of the base plate 10, thus preventing uneven temperature on the wall surface.

[0069] In this embodiment, there is one second rib 122, and the distance between the second rib 122 and the two side plates 20 is the same.

[0070] In this embodiment, along the width direction of the base plate 10, the distance between the top ends of the first rib 121 and the third rib 123 is less than the distance between the bottom ends of the first rib 121 and the third rib 123. The first rib 121 and the third rib 123 are configured as oblique ribs, and the inclination directions of the first rib 121 and the third rib 123 are opposite.

[0071] The application uses an inclined first rib 121 and second rib 122, which helps to increase the contact area with the liquid coolant and thus improve the heat exchange efficiency of the battery box.

[0072] Specifically, the angle between the extension direction of the first rib 121 and the inner bottom surface of the first flow channel 110 is no greater than 45°. The structure of the first rib 121 with an inclination angle of no more than 45° is beneficial to increasing the contact area between the liquid coolant and the first rib 121.

[0073] Specifically, the angle between the extension direction of the third rib 123 and the inner bottom surface of the first flow channel 110 is no greater than 45°. The structure of the third rib 123 having an inclination angle of no more than 45° is beneficial to increasing the contact area between the liquid coolant and the third rib 123.

[0074] In this embodiment, along the width direction of the base plate 10, the surfaces of the first rib 121 and the third rib 123 that are far apart from each other have rib protrusions 124 arranged in a direction that is far apart from each other, and the outer surface of the rib protrusions 124 is formed as a rib surface.

[0075] In particular, due to the structural arrangement of the rib protrusion 124, the outer surface of the rib protrusion 124 is formed as a rib surface. The structural arrangement of the rib surface further increases the contact area between the liquid coolant and the first rib 121 and the third rib 123, thereby improving the heat exchange efficiency of the battery box.

[0076] In this embodiment, one or more rib protrusions 124 are provided on the first rib 121 and the third rib 123. The specific number can be adapted according to the actual situation.

[0077] like Figure 1 and Figure 2 As shown, the base plate 10 and the two side plates 20 cooperate to form a U-shaped structure. Along the length of the base plate 10, the two ends of the U-shaped structure are specific confluence cavities, which are connected to the first flow channel 110 and the second flow channel 210.

[0078] The end manifold is used to connect the first flow channel 110 and the second flow channel 210 to ensure that the liquid coolant can flow between the first flow channel 110 and the second flow channel 210, thereby forming a dynamic liquid coolant, which is beneficial to increasing the heat dissipation effect.

[0079] The manifold in this application is also formed into a U-shaped structure.

[0080] In this embodiment, the battery housing also includes a plug 60. The manifold has an end opening on the side opposite to the first flow channel 110 and the second flow channel 210. The end opening is also U-shaped. The plug 60 is detachably installed at the end opening. The plug 60 is U-shaped. The two end openings are sealed by the plug 60 to prevent liquid coolant from overflowing and improve the sealing performance of the structure.

[0081] In this embodiment, the battery box also includes a water inlet 30 and a water outlet 40 disposed on the top surface of the base plate 10. The water inlet 30 and the water outlet 40 are used for liquid supply and liquid discharge, respectively. The liquid coolant enters the first flow channel 110 and the second flow channel 210 through the water inlet 30, and the liquid coolant flows out from the water outlet 40 from the first flow channel and the second flow channel 210.

[0082] The inlet nozzle 30 and the outlet nozzle 40 are connected to the manifold. Along the length of the base plate 10, the inlet nozzle 30 and the outlet nozzle 40 can be set at the same end of the base plate 10, or the inlet nozzle 30 and the outlet nozzle 40 can be set at the two ends of the base plate 10 respectively. The specific settings can be adapted according to the actual design needs.

[0083] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0084] The battery housing of this application adopts a top concave-convex surface 101 provided inside the first flow channel 110 and a side concave-convex surface 201 provided inside the second flow channel 210, thereby increasing the contact area between the liquid coolant and the inner wall of the flow channel, and thus improving the heat dissipation efficiency of the battery housing.

[0085] In this application, the top surface of the first flow channel 110 is formed as a top concave-convex surface 101, and the inner wall surfaces of the second flow channel 210 that are close to each other are formed as side concave-convex surfaces 201, so as to ensure that the side close to the cell 50 is set as a concave-convex surface structure. This setting is conducive to improving the heat exchange efficiency between the liquid coolant and the cell 50, while not destroying the heat preservation effect of the battery box, which is conducive to ensuring the stability of battery performance.

[0086] This application employs a first connecting rib 120 inside the first flow channel 110 and a second connecting rib 220 inside the second flow channel 210. By setting the first connecting rib 120 and the second connecting rib 220, the contact area with the liquid coolant is further increased, thereby improving the heat dissipation efficiency of the battery box. At the same time, the structural arrangement of the first connecting rib 120 and the second connecting rib 220 increases the structural strength of the bottom plate 10 and the side plate 20, thereby improving the structural strength of the battery box.

[0087] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0088] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0089] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0090] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery housing, characterized in that, include: The base plate (10) has a first flow channel (110) and a first connecting rib (120) disposed inside the first flow channel (110). The first connecting rib (120) divides the first flow channel (110) into a plurality of independent first sub-flow channels (111) along the width direction of the base plate (10). The inner top surface of the first flow channel (110) has a top concave-convex surface (101) disposed along the height direction of the base plate (10). Two side plates (20) are respectively disposed at both ends of the base plate (10) along the width direction. The side plate (20) has a second flow channel (210) and a second connecting rib (220) disposed inside the second flow channel (210). The first flow channel (110) communicates with the second flow channel (210). The second connecting rib (220) divides the second flow channel (210) into multiple independent second sub-flow channels (211) along the height direction of the base plate (10). The inner wall surfaces of the second flow channels (210) of the two side plates (20) that are close to each other have side concave and convex surfaces (201) disposed along the width direction of the base plate (10).

2. The battery housing according to claim 1, characterized in that, The inner top surface of the first flow channel (110) has a plurality of protrusions that rise toward the inner bottom surface of the first flow channel (110). The plurality of protrusions are spaced apart along the width direction of the bottom plate (10). The outer surfaces of the plurality of protrusions cooperate to form the top concave-convex surface (101) on the inner top surface of the first flow channel (110).

3. The battery housing according to claim 1, characterized in that, The inner top surface of the first flow channel (110) has a plurality of first grooves disposed toward the inner bottom surface of the first flow channel (110), the plurality of first grooves being spaced apart along the width direction of the bottom plate (10), and the groove wall surfaces of the plurality of first grooves cooperating to form the top concave-convex surface (101) on the inner top surface of the first flow channel (110).

4. The battery housing according to claim 1, characterized in that, Along the width direction of the base plate (10), On the inner wall surfaces of the second flow channels (210) of the two side plates (20) that are close to each other, a plurality of raised structures are formed, which are raised in a direction away from each other. The plurality of raised structures are spaced apart along the height direction of the bottom plate (10). The outer surfaces of the plurality of raised structures cooperate to form the side concave-convex surface (201) on the inner wall surfaces of the second flow channels (210) that are close to each other; or The inner wall surfaces of the second flow channels (210) of the two side plates (20) that are close to each other are formed with second grooves that are arranged in a direction that are close to each other. A plurality of second grooves are spaced apart along the height direction of the bottom plate (10). The inner wall surfaces of the plurality of second grooves cooperate to form the side concave-convex surface (201) of the inner wall surfaces of the second flow channels (210) that are close to each other.

5. The battery housing according to claim 1, characterized in that, Along the width direction of the base plate (10), the end of the second connecting rib (220) inside the two side plates (20) that is close to each other is the first end, and the end that is far away from each other is the second end; Along the height direction of the base plate (10), the distance between the second end and the base plate (10) is greater than the distance between the first end and the base plate (10).

6. The battery housing according to claim 5, characterized in that, The second connecting ribs (220) inside the two side plates (20) are symmetrically arranged about the bottom plate (10) along the width direction of the bottom plate (10).

7. The battery housing according to claim 1, characterized in that, The top end of the first connecting rib (120) is connected to the inner top surface of the first flow channel (110), and the bottom end of the first connecting rib (120) is connected to the inner bottom surface of the first flow channel (110). The first connecting rib (120) includes at least one first rib (121), a second rib (122) and at least one third rib (123) arranged sequentially along the width direction of the base plate (10). Along the width direction of the base plate (10), the distance between the top ends of the first rib (121) and the third rib (123) is less than the distance between the bottom ends of the first rib (121) and the third rib (123). The extension direction of the second rib (122) is perpendicular to the height direction of the base plate (10).

8. The battery housing according to claim 7, characterized in that, The first rib (121) and the third rib (123) are symmetrically arranged on both sides of the second rib (122).

9. The battery housing according to claim 7, characterized in that, The angle between the extending direction of the first rib (121) and the inner bottom surface of the first flow channel (110) is not greater than 45°; and / or The angle between the extension direction of the third rib (123) and the inner bottom surface of the first flow channel (110) is no greater than 45°.

10. The battery housing according to claim 7, characterized in that, Along the width direction of the base plate (10), the surfaces of the first rib (121) and the third rib (123) that are far apart from each other have rib protrusions (124) arranged in a direction that is far apart from each other, and the outer surface of the rib protrusions (124) is formed as a rib surface.

11. The battery housing according to any one of claims 1 to 10, characterized in that, The base plate (10) and the two side plates (20) cooperate to form a U-shaped structure. Along the length of the base plate (10), the two ends of the U-shaped structure are specifically converging cavities, which are connected to the first flow channel (110) and the second flow channel (210). The battery housing also includes a plug (60), and the manifold has an end opening on the side opposite to the first flow channel (110) and the second flow channel (210), at which the plug (60) is detachably installed; and / or The battery housing also includes a water inlet (30) and a water outlet (40) disposed on the top surface of the base plate (10). The water inlet (30) and the water outlet (40) are connected to the manifold. Along the length of the base plate (10), the water inlet (30) and the water outlet (40) are disposed at the same end of the base plate (10); or the water inlet (30) and the water outlet (40) are disposed at opposite ends of the base plate (10).

12. A battery, characterized in that, The battery housing includes any one of claims 1 to 11.

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