Battery box body and battery pack

Abstract

The utility model provides a battery box body and a battery pack, the battery box body is used for accommodating a battery cell, the battery box body comprises a main body, a liquid cooling plate and a bracket, and the main body is encircled into a ring shape. And the liquid cooling plate is arranged at one end of the main body in the extending direction, and can be used for cooling the battery cell in the cavity, so that the working temperature of the battery cell can be reduced, the normal work of the battery cell is further ensured, and the normal work of the battery is ensured. And the bracket is arranged at the other end of the main body in the extending direction, and can be used for supporting the battery cell and improving the structural strength of the main body so as to ensure the normal work of the battery cell. And the bracket, the main body and the liquid cooling plate jointly define a cavity for accommodating the battery cell. And the main body is a plastic main body, so that the weight of the battery box body can be reduced, and the requirement of light weight can be met.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery box and a battery pack. Background Art

[0002] Battery packs generally use boxes to protect the batteries to prevent the batteries from being hit by external forces or being attacked by moisture and dust, thereby extending the battery life.

[0003] In the related art, in order to ensure the safety of battery cells, the box of the battery pack is usually made of metal to ensure the structural strength of the box.

[0004] However, the above-mentioned box is heavy and difficult to transfer. Utility Model Content

[0005] In order to solve at least one of the problems mentioned in the background technology, the present application provides a battery box and a battery pack, aiming to solve the technical problems in the related art that the box has a large weight and is difficult to transfer.

[0006] In order to achieve the above-mentioned purpose, in a first aspect, the present application provides a battery box for accommodating a battery cell, the battery box comprising a main body, a liquid cooling plate and a bracket, the main body being arranged in a ring shape; the liquid cooling plate being arranged at one end of the main body in an extending direction, and the bracket being arranged at the other end of the main body in an extending direction;

[0007] The bracket, the main body and the liquid cooling plate together form a cavity for accommodating the battery cell;

[0008] The main body is a plastic body.

[0009] In the above-mentioned battery case, optionally, the main body is an integrated piece, and the main body is prepared by injection molding and extrusion molding.

[0010] In the above-mentioned battery box, optionally, the main body includes four plates connected end to end in sequence, and two adjacent plates are arranged at an angle.

[0011] In the above-mentioned battery box, optionally, it further includes at least two battery cell supports, and at least two of the battery cell supports are arranged on the inner side of the ring of the main body;

[0012] At least two of the battery core supports are symmetrically arranged around the ring center of the main body.

[0013] In the above-mentioned battery box, optionally, the battery cell support comprises a main board and a limiting protrusion arranged on the main board, the main board is arranged on the end surface of the main body, and the limiting protrusion is arranged on a side of the main board close to the center of the ring;

[0014] There are multiple limiting protrusions, and the multiple limiting protrusions are arranged at intervals along the extension direction of the main body. Two adjacent limiting protrusions jointly form a groove for clamping the battery core.

[0015] In the above-mentioned battery box, optionally, the main board and the limiting protrusion are an integrated piece, and the main board is detachably connected to the main body;

[0016] Alternatively, the main board, the limiting protrusion and the main body are an integrated piece.

[0017] In the above-mentioned battery box, optionally, a rib plate is provided on the main body;

[0018] The rib plate is arranged on the inner ring side wall and / or the outer ring side wall of the main body.

[0019] In the above-mentioned battery box, optionally, the rib plate includes a plurality of first rib plates and a plurality of second rib plates, the plurality of first rib plates are parallel and spaced apart on the outer ring side wall of the main body, the plurality of second rib plates are parallel and spaced apart on the outer ring side wall of the main body, and any of the first rib plates and any of the second rib plates are intersectingly arranged;

[0020] The first rib plate, the second rib plate and the main body are an integral part.

[0021] In the above-mentioned battery box, optionally, the bracket is connected to an end surface of the main body on one side away from the liquid cooling plate, and the bracket is bonded, snap-connected or threadedly connected to the main body.

[0022] In a second aspect, the present application also provides a battery pack, comprising a battery cell and the battery case, wherein the battery cell is located in the battery case.

[0023] The battery case and battery pack provided by the present application, the battery case is used to accommodate battery cells, the battery case includes a main body, a liquid cooling plate and a bracket, and the main body is arranged in a ring shape. The liquid cooling plate is arranged at one end of the extension direction of the main body. By arranging the liquid cooling plate, the liquid cooling plate can be used to cool the battery cells located in the cavity, which can reduce the operating temperature of the battery cells, thereby ensuring the normal operation of the battery cells, thereby ensuring the normal operation of the battery. The bracket is arranged at the other end of the extension direction of the main body. By arranging the bracket, the bracket can be used to support the battery cells and enhance the structural strength of the main body to ensure the normal operation of the battery cells. The bracket, the main body and the liquid cooling plate together form a cavity for accommodating the battery cells. The main body is a plastic main body. By arranging a main body made of plastic material, the weight of the battery case can be reduced, which can meet the demand for lightweight.

[0024] The structure of the present application and its other application objects and beneficial effects will be more clearly understood through the description of the preferred embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of the exploded structure of a battery box provided in an embodiment of the present application.

[0027] Description of reference numerals:

[0028] 10-battery box;

[0029] 100-main body; 101-cavity; 110-plate body;

[0030] 200-Liquid cooling plate;

[0031] 300-Bracket;

[0032] 400-battery core support; 410-main board; 420-limiting protrusion; 430-groove;

[0033] 500-rib plate; 510-first rib plate; 520-second rib plate.

[0034] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0035] In the related art, the box is usually assembled by sheet metal stamping or welding, but the sheet metal structure is heavy, resulting in a heavy box, which cannot meet customers' demands for lightweight battery boxes and battery packs.

[0036] Based on the above-mentioned technical problems, an embodiment of the present application provides a battery case and a battery pack, wherein the battery case is used to accommodate battery cells, and the battery case includes a main body, a liquid cooling plate and a bracket, and the main body is arranged in a ring shape. The liquid cooling plate is arranged at one end of the extension direction of the main body. By arranging the liquid cooling plate, the liquid cooling plate can be used to cool the battery cells located in the cavity, and the operating temperature of the battery cells can be reduced, thereby ensuring the normal operation of the battery cells, thereby ensuring the normal operation of the battery. The bracket is arranged at the other end of the extension direction of the main body. By arranging the bracket, the bracket can be used to support the battery cells and enhance the structural strength of the main body to ensure the normal operation of the battery cells. The bracket, the main body and the liquid cooling plate together form a cavity for accommodating the battery cells. The main body is a plastic main body. By arranging a main body made of plastic material, the weight of the battery case can be reduced, and the demand for lightweight can be met.

[0037] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar structural parts or structural parts with the same or similar functions. The described embodiments are part of the structural embodiments of the present application, rather than the embodiments of the full structure. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application. The embodiments of the present application are described in detail below in conjunction with the drawings.

[0038] In a first aspect, an embodiment of the present application provides a battery pack, comprising a battery cell and a battery case, wherein the battery cell is located in the battery case.

[0039] It can be understood that the type of battery cell can be arbitrary. For example, the battery cell can be a lithium-ion battery cell, which has a higher energy density and can have a longer continuous working time. In another example, the battery cell can be a nickel-metal hydride battery cell, which has a longer life and a lower cost. In another example, the battery cell can be a lithium iron phosphate battery cell, which has good thermal stability and chemical stability, is not prone to combustion, explosion, etc., and can improve the stability of battery use.

[0040] The embodiments of the present application do not limit the specific types of battery cells, nor are they limited to the above examples.

[0041] It should be noted that the shape of the battery cell can be arbitrary. For example, the shape of the battery cell can be a cylinder; for another example, the shape of the battery cell can be a cuboid; for another example, the shape of the battery cell can be a triangular prism. The embodiments of the present application do not limit the specific shape of the battery cell, but are not limited to the above examples.

[0042] It is understandable that the battery pack may include a plurality of cells, wherein the number of cells may be arbitrary, for example, the number of cells may be one, two, three, four, five, six, seven, etc. The embodiments of the present application do not limit the specific number of cells, nor are they limited to the above examples.

[0043] Furthermore, when the battery pack includes multiple cells, the multiple cells can be distributed in any manner within the battery case. For example, the multiple cells can be arranged in a spaced manner within the battery case, such as six cells can be distributed in two columns × three rows within the battery case; for another example, nine cells can be distributed in one column × nine rows within the battery case. The embodiments of the present application do not limit the specific distribution of the multiple cells within the battery case when the battery pack includes multiple cells, nor are they limited to the above examples.

[0044] Figure 1 A schematic diagram of the exploded structure of a battery box provided in an embodiment of the present application.

[0045] Second, refer to the attached Figure 1 As shown, the embodiment of the present application further provides a battery box 10, which is used to accommodate battery cells. The battery box 10 includes a main body 100, a liquid cooling plate 200 and a bracket 300.

[0046] Specifically, the main body 100 is arranged in a ring shape, the liquid cooling plate 200 is arranged at one end of the main body 100 in the extending direction, and the bracket 300 is arranged at the other end of the main body 100 in the extending direction; the bracket 300, the main body 100 and the liquid cooling plate 200 together form a cavity 101 for accommodating the battery cell. The cavity 101 can be used to accommodate the battery cell to protect the battery cell.

[0047] It is understandable that the material of the bracket 300 can be arbitrary. For example, the material of the bracket 300 can be plastic, metal, or other materials. The embodiment of the present application does not limit the specific material of the bracket 300, nor is it limited to the above examples.

[0048] The following description will be made by taking the bracket 300 as an example, which is made of metal.

[0049] By providing the bracket 300, the bracket 300 can be used to support the battery cell and improve the structural strength of the main body 100 to ensure the normal operation of the battery cell. Further, when the bracket 300 is made of metal, the bracket 300 has a high structural strength and high impact resistance, and can better support and protect the battery cell to ensure the normal use of the battery pack.

[0050] It should be noted that the extension direction of the main body 100 is the Figure 1 The X in.

[0051] In some embodiments, the shape of the cavity 101 formed by the main body 100, the liquid cooling plate 200 and the bracket 300 may be the same as the shape of the battery cell. Exemplarily, when the shape of the battery cell is a cylinder, the main body 100, the liquid cooling plate 200 and the bracket 300 may form a cylindrical cavity 101; another exemplary embodiment, when the shape of the battery cell is a rectangular parallelepiped, the main body 100, the liquid cooling plate 200 and the bracket 300 may form a rectangular parallelepiped cavity 101; another exemplary embodiment, when the shape of the battery cell is a triangular prism, the main body 100, the liquid cooling plate 200 and the bracket 300 may form a triangular prism cavity 101. At this time, the shape of the cavity 101 formed by the main body 100, the liquid cooling plate 200 and the bracket 300 is the same as the shape of the battery cell, the battery cell and the cavity 101 have a high adaptability, the battery cell can be stably arranged in the cavity 101 of the main body 100, and the installation stability of the battery cell can be improved.

[0052] In some other embodiments, the shape of the cavity 101 formed by the main body 100, the liquid cooling plate 200 and the bracket 300 may be different from the shape of the battery cell. Exemplarily, when the shape of the battery cell is a cylinder, the main body 100, the liquid cooling plate 200 and the bracket 300 may form a rectangular cavity 101; another exemplary embodiment, when the shape of the battery cell is a rectangular parallelepiped, the main body 100, the liquid cooling plate 200 and the bracket 300 may form a triangular prism cavity 101; another exemplary embodiment, when the shape of the battery cell is a triangular prism, the main body 100, the liquid cooling plate 200 and the bracket 300 may form a cylindrical cavity 101.

[0053] The embodiment of the present application does not limit the specific shape of the cavity 101 formed by the main body 100, the liquid cooling plate 200 and the bracket 300, and is not limited to the above example.

[0054] The following description will be made by taking the case where the cavity 101 formed by the main body 100 , the liquid cooling plate 200 and the bracket 300 is in the shape of a rectangular parallelepiped as an example.

[0055] It is understandable that a cooling liquid for cooling may flow inside the liquid cooling plate 200, and the material of the cooling liquid may be arbitrary. For example, the cooling liquid may include an ethylene glycol solution, a propylene glycol solution, or water, etc. The embodiment of the present application does not limit the specific type of the cooling liquid flowing inside the liquid cooling plate 200, nor is it limited to the above examples.

[0056] By providing the liquid cooling plate 200 , the liquid cooling plate 200 can be used to cool the battery cells in the cavity 101 , thereby lowering the operating temperature of the battery cells, thereby ensuring the normal operation of the battery cells, and thus ensuring the normal operation of the battery.

[0057] Further, the main body 100 is a plastic main body 100, that is, the material of the main body 100 is plastic, and illustratively, the material of the main body 100 is ABS (acrylonitrile butadiene styrene plastic, acrylonitrile-butadiene-styrene) plastic, PP (polypropylene) plastic, PE (polyethylene) plastic, PET (polyethylene glycol terephthalate, polyethylene terephthalate) plastic, PVC (polyvinylchloride, polyvinyl chloride) plastic and nylon, etc. The embodiment of the present application does not limit the specific material of the main body 100, nor is it limited to the above examples.

[0058] By providing the main body 100 of plastic material, the weight of the main body 100 is smaller than that of the main body 100 of metal material, so the weight of the battery box 10 can be reduced, thereby meeting the user's demand for lightweight battery box 10.

[0059] As an optional embodiment, a plurality of liquid channels connected in parallel are provided in the liquid cooling plate 200, so that the temperature uniformity inside the cavity can be improved and the heat of the battery cells in the battery pack can be efficiently dissipated.

[0060] As an optional implementation, the bracket 300 is connected to an end surface of the main body 100 away from the liquid cooling plate 200 , and the bracket 300 is connected to the main body 100 by bonding, snapping or threading.

[0061] It is understandable that the connection between the bracket 300 and the main body 100 can be arbitrary. Exemplarily, the bracket 300 and the main body 100 can be connected by adhesive, and the adhesive can be any viscous substance; another exemplary embodiment, the bracket 300 and the main body 100 are connected by a clamping structure that can be clamped with each other, such as the bracket 300 has a groove for clamping, and the main body 100 has an elastic member corresponding to the groove, and the elastic member can be located in the groove to complete the clamping connection between the bracket 300 and the main body 100; another exemplary embodiment, the bracket 300 and the main body 100 can be threadedly connected by a screw connection, such as the bracket 300 and the main body 100 have threaded holes, and the screw connection can pass through the threaded hole on the bracket 300 and be located in the threaded hole of the main body 100 to achieve the threaded connection between the bracket 300 and the main body 100.

[0062] Through the above arrangement, the bracket 300 and the main body 100 have a higher strength, so as to better support the battery cell, thereby ensuring the normal use of the battery cell.

[0063] As an optional implementation, the main body 100 includes four plates 110 connected end to end in sequence, and two adjacent plates 110 are arranged at an angle.

[0064] It should be noted that the angle between two adjacent plates 110 can be arbitrary. For example, the angle between two adjacent plates 110 can be 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, etc. The embodiment of the present application does not limit the specific angle between two adjacent plates 110, nor is it limited to the above examples.

[0065] The following description takes the specific angle between two adjacent plates 110 as 90° as an example, that is, the two adjacent plates 110 are vertically arranged, that is, along the extension direction perpendicular to the main body 100 (along the direction perpendicular to X), and the cross-sectional shape of the main body 100 is a rectangle.

[0066] Through the above arrangement, the main body 100 can be formed by four plates 110 connected end to end in sequence, and a rectangular cavity 101 can be enclosed to accommodate the battery cell.

[0067] Furthermore, the cross-sectional shape of the liquid cooling plate 200 is rectangular along the extension direction perpendicular to the main body 100 (in the direction perpendicular to X). It should be noted that when the shape of the cavity 101 formed by the main body 100 is a rectangular parallelepiped, the shape of the liquid cooling plate 200 can also be rectangular accordingly.

[0068] As an optional implementation, the four plates 110 are an integral part, that is, the main body 100 is integrally formed. Through the above configuration, the main body 100 has a high structural strength and good sealing to prevent the cavity 101 from leaking, and has good safety performance.

[0069] Furthermore, the main body 100 is prepared by injection molding and extrusion molding. That is, the preparation process of the main body 100 is a low-cost injection molding and extrusion molding process. Through the above arrangement, the preparation process of the main body 100 is simpler and the cost is lower, which can reduce the cost of the battery box 10 and the battery pack.

[0070] As an optional embodiment, the battery box 10 further includes at least two battery cell supports 400, and the at least two battery cell supports 400 are arranged on the inner side of the ring of the main body 100. The inner side of the ring refers to the side of the main body 100 close to the center of the ring.

[0071] Furthermore, at least two battery cell supports 400 are symmetrically arranged around the ring center of the main body 100. Through the above arrangement, the battery cell supports 400 can be arranged on the peripheral side of the main body 100 and are symmetrically arranged to support the battery cells located in the cavity 101 and enhance the supporting effect on the battery cells.

[0072] It should be noted that the number of cell supports 400 can be arbitrary. For example, the number of cell supports 400 can be two, three, four, five, six, etc. The embodiment of the present application does not limit the specific number of cell supports 400, nor is it limited to the above examples.

[0073] The following description will be made by taking the case where there are two battery cell supports 400 as an example, that is, the two battery cell supports 400 are respectively located on two opposite sides of the main body 100 to be symmetrically arranged.

[0074] As an optional embodiment, the cell support 400 includes a main board 410 and a limiting protrusion 420 disposed on the main board 410. The main board 410 is disposed on the end surface of the main body 100, and the limiting protrusion 420 is disposed on one side of the main board 410 close to the center of the ring. There are multiple limiting protrusions 420, and the multiple limiting protrusions 420 are arranged at intervals along the extension direction (i.e., X) of the main body 100. Two adjacent limiting protrusions 420 jointly form a groove 430 for clamping the cell.

[0075] It is understandable that the end of the battery cell can be clamped between two adjacent limiting protrusions 420 to limit the battery cell, so as to support and protect the battery cell.

[0076] It should be noted that the number of the limiting protrusions 420 on the cell support 400 can be arbitrary. For example, the number of the limiting protrusions 420 on the cell support 400 can be two, three, four, five, six, seven, eight, etc. The embodiment of the present application does not limit the specific number of the limiting protrusions 420 on the cell support 400, nor is it limited to the above examples.

[0077] As an optional implementation, the main board 410 and the limiting protrusion 420 are an integrated part, that is, the battery cell support 400 is an integrated part, which can enhance the structural strength of the battery cell support 400 to enhance the installation stability of the battery cell.

[0078] Furthermore, the main board 410 is detachably connected to the main body 100, that is, the cell support 400 is detachably connected to the main body 100. In this way, it is convenient to replace different cell supports 400, and it is also convenient to replace different main bodies 100, and it can be adjusted according to actual conditions, which can improve the versatility of the cell support 400 and reduce costs.

[0079] As another optional embodiment, the main board 410, the limiting protrusion 420 and the main body 100 are an integrated part, that is, the battery cell support 400 and the main body 100 are integrally formed, which can enhance the structural strength of the battery box 10 and improve the sealing performance of the battery box 10 to avoid leakage of the cavity 101, and has better safety performance.

[0080] As an optional embodiment, when the four plates 110 are an integral part, the four plates 110 are formed into an integral part through an injection molding process and an extrusion molding process, that is, the main body 100 is an integral part, and the preparation process is a low-cost injection molding process and an extrusion molding process. Through the above arrangement, the preparation process of the main body 100 is simpler and the cost is lower, which can reduce the cost of the battery box 10 and the battery pack.

[0081] In some other embodiments, when the main board 410, the limiting protrusion 420 and the main body 100 are an integral part, the main board 410, the limiting protrusion 420 and the main body 100 are formed into an integral part through an injection molding process and an extrusion molding process, that is, the main body 100 and the limiting support are an integral part, and the preparation process is a low-cost injection molding process and an extrusion molding process. Through the above arrangement, the preparation process of the main body 100 and the limiting support is simpler and the cost is lower, which can reduce the cost of the battery box 10 and the battery pack.

[0082] As an optional implementation, a rib plate 500 is provided on the main body 100 , and the rib plate 500 is provided on the inner ring wall or the outer ring wall of the main body 100 .

[0083] It can be understood that the rib plate 500 can enhance the structural strength of the main body 100 to enhance the structural strength of the battery box 10 to protect the battery cells and ensure the normal use of the battery cells.

[0084] It should be noted that the rib plate 500 can be disposed only on the inner sidewall of the main body 100, or only on the outer sidewall of the main body 100, or simultaneously on the inner sidewall and the outer sidewall of the main body 100. The embodiment of the present application does not limit the specific position of the rib plate 500, nor is it limited to the above examples.

[0085] When the rib plate 500 is disposed on the inner side wall of the ring of the main body 100 , the rib plate 500 and the cell support 400 need to avoid each other to avoid interference.

[0086] The following description will be made by taking an example where the rib plate 500 is only disposed on the outer ring side wall of the main body 100 .

[0087] As an optional embodiment, the rib plate 500 includes a plurality of first rib plates 510 and a plurality of second rib plates 520, wherein the plurality of first rib plates 510 are arranged in parallel and at intervals on the outer ring wall of the main body 100, and the plurality of second rib plates 520 are arranged in parallel and at intervals on the outer ring wall of the main body 100, and any first rib plate 510 and any second rib plate 520 are arranged to intersect.

[0088] It should be noted that the number of the first ribs 510 can be multiple. For example, the number of the first ribs 510 can be two, three, four, five, six, seven, etc. The embodiment of the present application does not limit the specific number of the first ribs 510, nor is it limited to the above examples. The number of the second ribs 520 can be the same as the number of the first ribs 510, or it can be different. In the embodiment of the present application, the number of the first ribs 510 is the same as the number of the second ribs 520.

[0089] It can be understood that the intersection angle between the first rib 510 and the second rib 520 can be arbitrary. For example, the angle between the extension direction of the first rib 510 and the extension direction of the second rib 520 can be 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, etc. The embodiment of the present application does not limit the specific angle between the extension direction of the first rib 510 and the extension direction of the second rib 520, nor is it limited to the above examples.

[0090] Through the above arrangement, the first rib plate 510 and the second rib plate 520 can enhance the structural strength of the main body 100 and improve the sealing performance of the battery box 10 to avoid leakage of the cavity 101, thereby having better safety performance.

[0091] Furthermore, the first rib plate 510, the second rib plate 520 and the main body 100 are integrated. Through the above arrangement, the first rib plate 510 and the second rib plate 520 have a high structural strength, which can further enhance the structural strength of the main body 100 and improve the sealing performance of the battery box 10 to prevent the cavity 101 from leaking, and have good safety performance.

[0092] As an optional embodiment, when the four plates 110 are an integral part, the four plates 110, the plurality of first ribs 510 and the plurality of second ribs 520 are formed into an integral part through an injection molding process and an extrusion molding process, that is, the main body 100, the first ribs 510 and the second ribs 520 are an integral part, and the preparation process is a low-cost injection molding process and an extrusion molding process. Through the above arrangement, the main body 100, the first ribs 510 and the second ribs 520 can be prepared together, the preparation process is relatively simple, the cost is low, and the cost of the battery box 10 and the battery pack can be reduced.

[0093] When the main board 410, the limiting protrusion 420 and the main body 100 are an integral part, the main board 410, the limiting protrusion 420, the main body 100, the plurality of first ribs 510 and the plurality of second ribs 520 are formed into an integral part through an injection molding process and an extrusion molding process, that is, the main body 100, the limiting support, the first rib 510 and the second rib 520 are an integral part, and the preparation process is a low-cost injection molding process and an extrusion molding process. Through the above arrangement, the preparation process of the main body 100, the limiting support, the first rib 510 and the second rib 520 is simple and low-cost, which can reduce the cost of the battery box 10 and the battery pack.

[0094] In the description of the embodiments of the present application, it should be understood that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the connection of the structures inside two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0095] The terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In the description of the present application, "plurality" means two or more, unless otherwise specified.

[0096] The terms "first", "second", "third", "fourth", etc. in the specification and claims of the present application and the above-mentioned drawings 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 the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for the structural or complete structural technical features therein. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery box for accommodating a battery cell, characterized in that: The battery box includes a main body, a liquid cooling plate and a bracket, wherein the main body is arranged in a ring shape; the liquid cooling plate is arranged at one end of the main body in the extending direction, and the bracket is arranged at the other end of the main body in the extending direction; The bracket, the main body and the liquid cooling plate together form a cavity for accommodating the battery cell; The main body is a plastic body.

2. The battery box according to claim 1, characterized in that: The main body is an integral piece and is prepared by injection molding and extrusion molding.

3. The battery box according to claim 1, characterized in that: The main body comprises four plates which are connected end to end in sequence, and two adjacent plates are arranged at an angle.

4. The battery case according to any one of claims 1 to 3, characterized in that: Also comprising at least two battery cell supports, at least two of the battery cell supports are disposed inside the ring of the main body; At least two of the battery core supports are symmetrically arranged around the ring center of the main body.

5. The battery box according to claim 4, characterized in that: The cell support comprises a main board and a limiting protrusion arranged on the main board, wherein the main board is arranged on the end surface of the main body, and the limiting protrusion is arranged on a side of the main board close to the center of the ring; There are multiple limiting protrusions, and the multiple limiting protrusions are arranged at intervals along the extension direction of the main body. Two adjacent limiting protrusions jointly form a groove for clamping the battery core.

6. The battery box according to claim 5, characterized in that: The main board and the limiting protrusion are an integrated piece, and the main board is detachably connected to the main body; Alternatively, the main board, the limiting protrusion and the main body are an integrated piece.

7. The battery case according to any one of claims 1 to 3, characterized in that: The main body is provided with a rib plate; The rib plate is arranged on the inner ring side wall and / or the outer ring side wall of the main body.

8. The battery case according to claim 7, characterized in that: The ribs include a plurality of first ribs and a plurality of second ribs, wherein the plurality of first ribs are parallel and spaced apart on the outer ring side wall of the main body, and the plurality of second ribs are parallel and spaced apart on the outer ring side wall of the main body, and any of the first ribs and any of the second ribs are intersectingly arranged; The first rib plate, the second rib plate and the main body are an integral part.

9. The battery case according to any one of claims 1 to 3, characterized in that: The bracket is connected to an end surface of the main body which is away from the liquid cooling plate, and the bracket is connected to the main body by bonding, snapping or threading.

10. A battery pack, characterized in that: It comprises a battery cell and a battery case as claimed in any one of claims 1 to 9, wherein the battery cell is located in the battery case.

Images