Battery box structure

Abstract

The utility model provides a battery box structure. The battery box structure comprises a battery pack, a liquid cooling plate; the metal frame is arranged below the liquid cooling plate and is provided with four side edge strips which are connected end to end, each side edge strip is provided with a turned-over edge which is turned over upwards, the side edge strips bear the liquid cooling plate, and the turned-over edges wrap the lower portion of the liquid cooling plate; the liquid cooling plate is covered with the upper cover, the battery pack is packaged between the upper cover and the liquid cooling plate, flange edges used for being fixedly connected with the liquid cooling plate are arranged on the periphery of the upper cover, and a first window and a second window which are adjacent to each other are formed in the side wall of one side of the upper cover; the connector assembly is connected to the first window in a sealing manner, and the connector assembly is integrated with a high-voltage connector and a low-voltage connector; and the maintenance port assembly is hermetically connected to the second window. According to the battery box structure, the edge of the liquid cooling plate can be wrapped by arranging the metal frame, the overall strength of the liquid cooling plate can be improved, the overall weight is light, and the structure is compact.

Description

Technical Field

[0001] The utility model relates to a new energy storage device, in particular to a battery box structure used in an energy storage container. Background Art

[0002] Energy storage is an important technology and basic equipment to help develop renewable energy and build new power systems. The design of energy storage systems is an important support for the development of energy storage technology, including container design, battery cluster design, battery box design, etc. The energy storage energy unit is a mechanism that connects several or dozens of lithium-ion batteries in series and parallel. At present, multiple groups of battery boxes are installed in layers on the bracket inside the container, and the batteries in these battery boxes are water-cooled through liquid cooling plates. The existing battery pack structure is complex, the overall weight is large, and it occupies a large space.

[0003] The above information disclosed in the background technology section is only used to enhance the understanding of the background of the present invention and therefore it may include information that does not constitute the prior art known to a person of ordinary skill in the art. Summary of the invention

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a battery box structure with a compact structure and light weight.

[0005] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present invention.

[0006] According to one aspect of the utility model, a battery box structure is provided, the battery box structure comprising:

[0007] Battery pack;

[0008] A liquid cooling plate is disposed below the battery pack and is used to support the battery pack, and a heat-conducting medium is filled in the gap between the battery pack and the liquid cooling plate;

[0009] A metal frame, arranged below the liquid cooling plate, having four side strips connected end to end, each of the side strips being provided with an upwardly folded flange, the side strips bearing the liquid cooling plate, and the flanges wrapping the lower part of the liquid cooling plate;

[0010] An upper cover, covering the liquid cooling plate, and encapsulating the battery pack between the upper cover and the liquid cooling plate, the upper cover is provided with a flange edge for fixed connection with the liquid cooling plate around the upper cover, and a first window and a second window adjacent to each other are opened on one side wall of the upper cover;

[0011] A connector assembly, sealed and connected to the first window, wherein the connector assembly integrates a high-voltage connector and a low-voltage connector;

[0012] The maintenance port assembly is sealed and connected to the second window.

[0013] According to an embodiment of the present invention, the heat-conducting medium includes one or more of a heat-conducting glue, a heat-conducting pad and a heat-conducting paste.

[0014] According to an embodiment of the present invention, the material of the liquid cooling plate includes aluminum, copper, aluminum-magnesium alloy and titanium alloy.

[0015] According to an embodiment of the present invention, the material of the metal frame includes iron, steel, aluminum and copper.

[0016] According to an embodiment of the present utility model, the liquid cooling plate and the flange edge of the upper cover are fixed in one of the following ways: screw connection, welding, riveting and clamping.

[0017] According to an embodiment of the present invention, the battery pack and the high voltage connector are connected via a conductive bar.

[0018] According to an embodiment of the present invention, the conductive bar is made of copper, aluminum and silver.

[0019] According to one embodiment of the present invention, the width of the side strips is 2 to 3 cm.

[0020] According to one embodiment of the present invention, the height of the flange is 5 to 20 mm.

[0021] According to an embodiment of the present invention, the upper cover is a plastic part.

[0022] It can be seen from the above technical solution that the advantages and positive effects of the utility model are:

[0023] In the battery box structure of the utility model, the weight of the metal frame can be greatly reduced compared with the original plate. The part where the side strip contacts the liquid cooling plate is the edges around the liquid cooling plate. These edges of the liquid cooling plate are used to connect other components. In this way, by setting up the metal frame, the edge of the liquid cooling plate can be wrapped, which can increase the overall strength of the liquid cooling plate. Therefore, the battery box structure of the present application can carry the battery pack and the upper cover through the bearing structure composed of the liquid cooling plate and the metal frame, and there is no need to set up the lower box of the existing battery box structure. The overall weight is light and the structure is compact, which can meet the use requirements. In addition, it can also realize that the lower surface of the liquid cooling plate is directly exposed to the air, and heat can be dissipated through the air, further improving the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the specific embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is an exploded schematic diagram of the battery box structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the explosion of the battery box structure from another angle.

[0027] In the figure: 1. Liquid cooling plate; 2. Battery pack; 3. Metal frame; 31. Side strip; 32. Flanged edge; 4. Connector assembly; 5. Maintenance port assembly; 6. Conductive bar; 7. BTU; 8. Upper cover; 81. First window; 82. Second window; 83. Flange. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] See also Figure 1 and Figure 2 , the utility model embodiment discloses a battery box structure. Figure 1 It is an exploded schematic diagram of the battery box structure of the utility model; Figure 2 This is an exploded schematic diagram of the battery box structure viewed from another angle. The battery box structure includes a liquid cooling plate 1, a battery pack 2, a metal frame 3, a connector assembly 4, a maintenance port assembly 5, and an upper cover 8.

[0033] The battery pack 2 is formed by connecting a plurality of lithium batteries together. The connection method between the individual lithium batteries is the existing technology. The battery pack 2 is used to store or release electrical energy.

[0034] The liquid cooling plate 1 is disposed below the battery pack 2 and is used to carry the battery pack 2. A thermal conductive medium is filled in the gap between the battery pack 2 and the liquid cooling plate 1. In some embodiments, the thermal conductive medium includes one or more of a thermal conductive glue, a thermal conductive pad, and a thermal conductive paste.

[0035] As can be seen from the figure, the battery pack 2 is a rectangular parallelepiped structure as a whole. The liquid cooling plate 1 is a rectangular plate-like structure. A flow channel for cooling water is set inside the liquid cooling plate 1. The liquid cooling plate 1 is provided with inlet and outlet water joints connected to the cooling system of the container. The cooling water provided by the cooling system continuously flows into and out of the liquid cooling plate 1 through the inlet and outlet water joints, which can take away the heat generated by the battery pack 2 when working. In some embodiments, the material of the liquid cooling plate 1 can be selected from iron, steel, stainless steel, aluminum, copper, etc. Specifically in the present embodiment, the liquid cooling plate 1 is made of aluminum casting.

[0036] The metal frame 3 is arranged below the liquid cooling plate 1 and is a rectangular frame. The metal frame 3 has four side strips 31 connected end to end, and each side strip 31 is provided with a flange 32 folded upward. The side strip 31 carries the liquid cooling plate 1. The flange 32 wraps the lower part of the liquid cooling plate 1, that is, the four flanges 32 enclose an internal space, and the lower part of the liquid cooling plate 1 is accommodated in the space. When the height of the four flanges 32 is higher, the range of the lower part of the liquid cooling plate 1 that is wrapped is larger. When the height of the flange 32 is lower, the range of the lower part of the liquid cooling plate 1 that is wrapped is smaller.

[0037] Specifically, in this embodiment, the metal frame 3 is obtained by hollowing out the middle of a metal plate, so that the weight of the metal frame 3 can be greatly reduced compared to the plate used as the bottom plate in the prior art. The side strip 31 contacts the liquid cooling plate 1 at the edges of the liquid cooling plate 1, and these edges of the liquid cooling plate 1 are used to connect other components. In this way, by setting the metal frame 3, the edges of the liquid cooling plate 1 can be wrapped, and the overall strength of the liquid cooling plate 1 can be increased. Therefore, the battery box structure of the present application can carry the battery pack 2 and the upper cover 8 through the bearing structure composed of the liquid cooling plate 1 and the metal frame, and there is no need to set up the lower box of the existing battery box structure. The overall weight is light and the structure is compact, which can meet the use requirements. In addition, it can also realize that the lower surface of the liquid cooling plate 1 is directly exposed to the air, and heat can be dissipated through the air, further improving the heat dissipation effect.

[0038] In this embodiment, the metal frame 3 is obtained by hollowing out the middle of a metal plate, and the hollow portion of the metal frame 3 can be punched by a punching machine, or can be manufactured by milling, wire cutting, and other processing methods. After the hollow portion is formed by processing, the metal frame 3 is leveled, and then the flange 32 around the metal frame 3 is punched by a punching machine.

[0039] In some other embodiments of the present invention, the metal frame 3 can be made by welding four sheets connected in the first place, and after the hollow frame is made, it is flanging-processed by a punching machine.

[0040] In some embodiments of the present invention, the metal frame 3 can be formed by welding four sheets with right-angled cross sections, that is, firstly processing the flanging on the sheet, and then connecting and welding the four sheets together.

[0041] The metal frame 3 may be made of iron, steel, stainless steel, aluminum and copper. In this embodiment, the metal frame 3 is made of steel, and the width of the side strip 31 of the metal frame 3 is 2 to 3 cm, and the height of the flange 32 is 5 to 20 mm.

[0042] The upper cover 8 is covered on the liquid cooling plate 1, and the battery pack 2 is encapsulated between the upper cover 8 and the liquid cooling plate 1. The upper cover 8 is provided with a flange edge 83 for fixed connection with the liquid cooling plate 1 around it. The upper cover 8 is a square structure and can be buckled on the liquid cooling plate 1. The upper cover 8 can be a plastic part made of plastic casting. Compared with metal materials, it can reduce the amount of metal materials used and reduce weight, and at the same time has an insulating effect. The flange edge 83 of the upper cover 8 is fixed to the liquid cooling plate 1 by one of screw connection, welding, riveting and clamping.

[0043] When the upper cover 8 is screwed to the liquid cooling plate 1, a screw installation hole can be opened on the flange edge 83 of the upper cover 8, and a corresponding threaded hole can be opened at the edge of the upper surface of the liquid cooling plate 1. After the screw is passed through the screw installation hole on the flange edge 83, the screw is screwed into the threaded hole of the liquid cooling plate 1 to achieve a fixed connection between the upper cover 8 and the liquid cooling plate 1. Alternatively, screw installation holes can be opened on both the flange edge 83 of the upper cover 8 and the liquid cooling plate 1, and after the screw is passed through the screw installation holes of the two, the nut is screwed on the screw to complete the fixed connection between the upper cover 8, the liquid cooling plate 1 and the metal frame 3.

[0044] The side wall of one side of the upper cover 8 is provided with adjacent first window 81 and second window 82. The connector assembly 4 is sealed and connected to the first window 81, and the connector assembly 4 integrates a high-voltage connector and a low-voltage connector. The maintenance port assembly 5 is sealed and connected to the second window. The connector assembly 4 and the maintenance port assembly 5 are located at the front of the liquid cooling plate 1. The front of the liquid cooling plate 1 here means that the battery box structure is installed on a bracket located in the container when in use, and at this time, the side of the liquid cooling plate 1 close to the operator is the front of the liquid cooling plate 1. The maintenance port assembly 5 is an existing structure, which includes conventional components such as BTU 7. BTU 7 can collect information such as battery cell temperature and voltage. When the connector assembly 4 is sealed and connected to the first window 81, sealing can be achieved by close contact between the connector assembly 4 and the side wall of the first window 81, or by providing a sealing ring, sealant, rubber cushion layer, etc. between the connector assembly 4 and the side wall of the first window 81 to achieve a sealed connection. When the maintenance port assembly 5 is sealed and connected to the second window 82, the sealing can be achieved through close contact between the maintenance port assembly 5 and the side wall of the second window 82, or by providing a sealing ring, sealant, rubber cushion layer, etc. between the maintenance port assembly 5 and the side wall of the second window 82.

[0045] In this embodiment, the high-voltage connector of the connector assembly 4 is connected to the battery pack through the conductive bar 6. The power electricity is drained from the battery pack to the high-voltage connector through the conductive bar 6. The low-voltage communication uses a wire harness to drain the battery signal to the low-voltage connector. The conductive bar 6 is made of copper, aluminum and silver.

[0046] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0047] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery box structure, characterized in that: The battery box structure includes: Battery pack; A liquid cooling plate is disposed below the battery pack and is used to support the battery pack, and a heat-conducting medium is filled in the gap between the battery pack and the liquid cooling plate; A metal frame, arranged below the liquid cooling plate, having four side strips connected end to end, each of the side strips being provided with an upwardly folded flange, the side strips bearing the liquid cooling plate, and the flanges wrapping the lower part of the liquid cooling plate; An upper cover, covering the liquid cooling plate, and encapsulating the battery pack between the upper cover and the liquid cooling plate, the upper cover is provided with a flange edge for fixed connection with the liquid cooling plate around the upper cover, and a first window and a second window adjacent to each other are opened on one side wall of the upper cover; A connector assembly, sealed and connected to the first window, wherein the connector assembly integrates a high-voltage connector and a low-voltage connector; The maintenance port assembly is sealed and connected to the second window.

2. The battery box structure according to claim 1, characterized in that: The heat-conducting medium includes one or more of a heat-conducting glue, a heat-conducting pad and a heat-conducting paste.

3. The battery box structure according to claim 1, characterized in that: The material of the liquid cooling plate includes aluminum, copper, aluminum-magnesium alloy and titanium alloy.

4. The battery box structure according to claim 1, characterized in that: The materials of the metal frame include iron, steel, aluminum and copper.

5. The battery box structure according to claim 1, characterized in that: The liquid cooling plate and the flange edge of the upper cover are fixed in one of the following ways: screw connection, welding, riveting and clamping.

6. The battery box structure according to claim 1, characterized in that: The battery pack is connected to the high-voltage connector via a conductive bar.

7. The battery box structure according to claim 6, characterized in that: The conductive bar is made of copper, aluminum and silver.

8. The battery box structure according to claim 1, characterized in that: The width of the side strips is 2 to 3 cm.

9. The battery box structure according to claim 1, characterized in that: The height of the flange is 5 to 20 mm.

10. The battery box structure according to claim 1, characterized in that: The upper cover is a plastic part.

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