Battery box, battery pack and vehicle

Abstract

The utility model discloses a battery box, battery pack and vehicle, the battery box comprises an upper box body and a lower box body, the upper box body and the lower box body are detachably connected to construct an accommodating space for accommodating a battery module, the upper box body comprises a box body and a cold plate, the cold plate is detachably connected with the box body, and the cold plate is detachably connected with the box body. The box body comprises a top plate and a surrounding plate connected to the outer periphery of the top plate, the top plate is provided with a window opposite to the battery module, and the cold plate is installed on the upper side of the top plate and used for sealing and covering the window. According to the battery box disclosed by the embodiment of the utility model, through the integration of the box body and the cold plate, the integration of the battery box can be better improved, meanwhile, the material of the box body can be reduced, and the manufacturing cost of the box body is reduced. Meanwhile, the design space of the battery box and the battery module can be well optimized, and the flexibility of the battery box is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery box, a battery pack and a vehicle. Background Art

[0002] New energy electric vehicles are equipped with power batteries to ensure power supply. The power batteries include a casing and multiple battery cells integrated in the casing. The casing protects the internal battery cells and provides heat dissipation (when the outside temperature is high, the battery cell operating temperature will be too high) and insulation (when the outside temperature is low, the battery cell operating temperature will be too low) for the internal battery cells. The degree of casing integration in the related technology still has room for improvement. At the same time, the spatial layout of the casing and the battery cells inside the casing also has room for improvement. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery box that can better integrate a cold plate and can better optimize the design space of the battery box and the battery module, thereby increasing the flexibility of the battery box.

[0004] According to an embodiment of the utility model, the battery box includes an upper box body and a lower box body, and the upper box body and the lower box body are detachably connected to construct an accommodating space for accommodating a battery module. The upper box body includes a box body and a cold plate, and the box body includes a top plate and a surrounding plate connected to the outer periphery of the top plate, the top plate has a window opposite to the battery module, and the cold plate is installed on the upper side of the top plate for covering the window.

[0005] According to the battery box of the embodiment of the utility model, the integration of the box body and the cold plate can be improved, and the material of the box body can be reduced, and the manufacturing cost of the box body can be reduced. At the same time, the design space of the battery box and the battery module can be optimized, and the flexibility of the battery box can be increased.

[0006] In addition, the battery box according to the utility model may also have the following additional technical features:

[0007] In some embodiments of the present invention, the cold plate includes an upper plate body and a lower plate body, the lower side of the upper plate body is stamped with a groove that is bent, extends and opens downward, and the lower plate body covers the opening of the groove to construct a liquid cooling channel with the upper plate body.

[0008] In some embodiments of the present invention, the side surface of the cold plate has a protrusion connected to an external pipeline, and the liquid inlet and the liquid outlet of the liquid cooling channel are both located on the protrusion.

[0009] In some embodiments of the present invention, a structural adhesive layer is provided between the cold plate and the top plate, and / or the cold plate and the top plate are fixedly connected via a fixing member.

[0010] In some embodiments of the present invention, the upper box body is a composite box body, or the upper box body is a steel box body.

[0011] In some embodiments of the present invention, a heat insulation layer is provided between the cold plate and the top plate.

[0012] In some embodiments of the present invention, the upper box body is an integral stamped part, or the upper box body includes a plurality of frames, and the plurality of frames are sequentially spliced ​​to construct the upper box body, and the plurality of frames are all integral stamped parts.

[0013] In some embodiments of the present invention, an insulating layer is provided on the lower side of the cold plate facing the battery module.

[0014] The utility model also provides a battery pack having the battery box of the above embodiment.

[0015] The battery pack according to the embodiment of the utility model includes a battery box and a battery module. The battery module is installed in the battery box. The upper side of the battery module is provided with a heat conductive member opposite to the window. The upper surface of the heat conductive member is in contact with the lower surface of the cold plate. As a result, the cold plate can better exchange heat with the battery module through the heat conductive member. The heat conductive member can be a heat conductive adhesive. This can increase the connection strength between the battery module and the cold plate, so that the cold plate can exchange heat with the battery module more stably. At the same time, the battery module can also better support the cold plate, thereby improving the structural strength of the cold plate.

[0016] According to the battery pack of the utility model, by providing the battery box of the above embodiment, the battery module can be well protected, and at the same time, by integrating the box body and the cold plate, the integration of the battery box can be well improved, and at the same time, the material of the box body can be reduced, and the manufacturing cost of the box body can be reduced. At the same time, the design of the battery box and the battery module can be well optimized, and the flexibility of the battery box is increased.

[0017] The utility model also provides a vehicle having the battery pack of the above embodiment.

[0018] The vehicle according to the embodiment of the utility model includes a vehicle body floor and a battery pack, wherein the battery pack is mounted on the lower side of the vehicle body floor, and thermal insulation foam is arranged between the upper side of the cold plate and the lower side of the vehicle body floor.

[0019] According to the vehicle of the embodiment of the utility model, by being provided with the battery pack of the above embodiment, the battery box can better protect the battery module, and at the same time, by integrating the box body and the cold plate, the integration of the battery box can be better improved, and at the same time, the material of the box body can be reduced, and the manufacturing cost of the box body can be reduced. At the same time, the design of the battery box and the battery module can be better optimized, and the flexibility of the battery box can be increased.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a structural schematic diagram of a battery box according to an embodiment of the utility model.

[0023] Figure 2 Detailed description of the invention The figure is an exploded view of a battery box according to an embodiment of the present invention.

[0024] Figure 3 It is a schematic structural diagram of a box body of a battery box according to an embodiment of the utility model.

[0025] Figure 4 It is an exploded view of the box body of the battery box according to the embodiment of the utility model.

[0026] Figure 5 It is a structural schematic diagram of a battery box provided with thermal insulation foam according to an embodiment of the utility model.

[0027] Reference numerals:

[0028] Battery box 100, battery module 200,

[0029] Upper box body 1, frame 10, box body 11, first enclosure 111, second enclosure 112, third enclosure 113, fourth enclosure 114, first flange 115, second flange 116, third flange 117, fourth flange 118, cold plate 12, liquid cooling channel 121, protrusion 122,

[0030] Lower box body 2, structural adhesive layer 31, thermal insulation foam 32. DETAILED DESCRIPTION

[0031] 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.

[0032] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. 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 "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 or an electrical connection; 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 utility model can be understood according to specific circumstances.

[0034] Reference below Figure 1-Figure 5 A battery box 100 according to an embodiment of the present invention is described.

[0035] like Figure 1-Figure 4 As shown, the battery box 100 according to the embodiment of the utility model includes an upper box body 1 and a lower box body 2, and the upper box body 1 and the lower box body 2 can be detachably connected to construct a storage space for accommodating the battery module 200, as shown in FIG. Figure 1-Figure 4 As shown, the upper box body 1 has a first accommodating cavity opening downward, and the lower box body 2 has a second accommodating cavity opening upward. The upper box body 1 and the lower box body 2 are detachably connected, so that the first accommodating cavity and the second accommodating cavity jointly define a sealed accommodating space. The battery module 200 is installed in the sealed accommodating space to protect the battery module 200.

[0036] Furthermore, the upper box body 1 includes a box body 11 and a cold plate 12. The box body 11 includes a top plate and a surrounding plate connected to the outer periphery of the top plate. The top plate has a window opposite to the battery module 200. The cold plate 12 is installed on the upper side of the top plate to cover the window.

[0037] like Figure 1-Figure 4 As shown, the enclosure of the box body 11 includes a first enclosure 111, a second enclosure 112, a third enclosure 113 and a fourth enclosure 114, and the four enclosures are connected in sequence to form a rectangular cylindrical structure with upper and lower openings. The upper end of the first enclosure 111 has a first flange 115, the upper end of the second enclosure 112 has a second flange 116, the upper end of the third enclosure 113 has a third flange 117, and the upper end of the fourth enclosure 114 has a fourth flange 118. The first flange 115, the second flange 116, the third flange 117 and the fourth flange 118 together construct a top plate with a window, and the cold plate 12 can be fixed to the box body 11 by fixed connection with the first flange 115, the second flange 116, the third flange 117 and the fourth flange 118 respectively, and can be better sealed at the window, thereby ensuring the sealing of the accommodating space. The present application can improve the integration of the battery box 100 by integrating the box body 11 and the cold plate 12 , and can also reduce the material of the box body 11 and the manufacturing cost of the box body 11 .

[0038] In addition, in the present application, the cold plate 12 is installed on the upper side of the top plate. In this way, the cold plate 12 does not need to be installed in the accommodating space, and the layout in the accommodating space can be optimized. On the one hand, the occupation of the accommodating space by the cold plate 12 can be reduced, and the volume of the battery module 200 can be increased. That is, the size of the battery box 100 remains unchanged, but the increase in the volume of the battery module 200 can be beneficial to improving the power storage capacity of the battery module 200. On the other hand, it can be beneficial to reduce the size of the battery box 100. That is, the volume of the battery module 200 remains unchanged, and the battery box 100 does not need to accommodate the cold plate 12, which can reduce the size of the battery box 100, thereby facilitating the assembly of the battery box 100.

[0039] Therefore, according to the battery box 100 of the embodiment of the utility model, the integration of the box body 11 and the cold plate 12 can be well improved, and the material of the box body 11 can be reduced, and the manufacturing cost of the box body 11 can be reduced. At the same time, the design of the battery box 100 and the battery module 200 can also be well optimized, and the flexibility of the battery box 100 is increased.

[0040] In some embodiments of the present invention, the cold plate 12 includes an upper plate body and a lower plate body. The lower side of the upper plate body is stamped with a groove that is bent, extended and opened downward. The lower plate body covers the opening of the groove to construct a liquid cooling channel 121 with the upper plate body.

[0041] Exemplarily, the upper plate body and the lower plate body are both metal parts, and the upper plate body can be formed with a groove by stamping, which is simple and convenient to operate. The upper plate body and the lower plate body can be fixedly connected by welding, so as to better construct the liquid cooling channel 121, and the liquid cooling channel 121 has good sealing performance. In the present application, the cold plate 12 is used as the external protection plate of the battery box 100, and the stamped groove enables the upper side surface of the upper plate body to construct a curved and extended convex rib, thereby improving the structural strength of the upper plate body. At the same time, the cold plate 12 is composed of two plates, the upper plate body and the lower plate body, which can also improve the structural strength of the cold plate 12, so that the cold plate 12 can better protect the battery module 200 in the battery box 100.

[0042] Alternatively, if Figure 1-Figure 4 As shown, the side of the cold plate 12 has a protrusion 122 connected to the external pipeline, and the liquid inlet and the liquid outlet of the liquid cooling channel 121 are both located on the protrusion 122. Therefore, the external pipeline can be better connected with the liquid cooling channel 121 through the liquid inlet and the liquid outlet on the protrusion 122. The structure is simple and the operation is convenient. At the same time, by arranging the protrusion 122 on the cold plate 12, the fixed connection between the cold plate 12 and the top plate will not be affected. That is, the protrusion 122 of the present application is outside the matching area between the cold plate 12 and the top plate. In this way, the connection strength between the cold plate 12 and the top plate can be guaranteed.

[0043] In some embodiments of the present invention, Figure 1-Figure 4 As shown, a structural adhesive layer 31 is provided between the cold plate 12 and the top plate, that is, the cold plate 12 and the top plate can be fixedly connected by means of structural adhesive, and after the structural adhesive solidifies, a structural adhesive layer 31 is formed between the cold plate 12 and the top plate. The structural adhesive layer 31 can effectively reduce the amount of cold or heat transferred from the cold plate 12 to the enclosure through the top plate, thereby reducing the influence of the temperature change of the enclosure on the battery module 200. Therefore, illustratively, the thickness of the structural adhesive layer 31 can be designed according to actual needs.

[0044] In some embodiments of the present invention, the cold plate 12 and the top plate are fixedly connected by a fixing member. In one example, after the cold plate 12 and the top plate are fixedly connected by a structural adhesive, they can also be fixedly connected by a fixing member. For example, the fixing member can be a screw or a rivet, and the riveting method can be a punch riveting, a pressure riveting, a pull riveting or other processes, which are not limited in this application. In one example, the cold plate 12 and the top plate can also be directly fixedly connected by a fixing member, and the seal between the cold plate 12 and the top plate can be sealed by a sealing ring or the like, which is not limited in this application.

[0045] In some embodiments of the present invention, the upper box body 1 is a composite box body, or the upper box body 1 is a steel box body. Here, it should be noted that in the related art, the material of the battery box 100 is often aluminum, and the box body made of aluminum has good thermal conductivity, which makes it easy for the cold or heat of the cold plate 12 to be transferred to the battery module 200 through the box body, thereby affecting the operation of the battery module 200. However, the present application replaces the material of the battery box 100 so that the upper box body 1 is a composite box body, or the upper box body 1 is a steel box body. The thermal conductivity of the composite box body and the steel box body is poor relative to that of the aluminum box body. Therefore, the cold or heat transferred from the cold plate 12 to the battery module 200 through the battery box 100 can be reduced, thereby reducing the impact of the battery box 100 on the battery module 200.

[0046] Optionally, a heat insulating layer may be provided between the cold plate 12 and the top plate, and the heat insulating layer may effectively reduce the amount of cold or heat transferred from the cold plate 12 toward the top plate. In one example, the heat insulating layer may be heat insulating foam, etc., which is not limited in the present application.

[0047] In some embodiments of the present invention, the upper box body 1 is an integral stamping part. Figure 1-Figure 4 As shown, the upper box body 1 is a box body structure formed by stamping a metal plate, which has a simple structure and is easy to operate. The upper box body 1 has good consistency after stamping and good sealing in the circumferential direction.

[0048] Alternatively, if Figure 4 As shown, the upper box 1 includes a plurality of frames 10, and the plurality of frames 10 are sequentially spliced ​​to construct the upper box 1, and the plurality of frames 10 are all integrally stamped parts. That is to say, the plurality of frames 10 can be processed by integrally stamping and then spliced ​​into the upper box 1, so that, compared with the entire upper box 1, the size of each frame 10 is smaller, which can well reduce the size and volume of the stamping module, thereby reducing the cost of the stamping module, and thus, the production cost of the frame 10 can be reduced.

[0049] In some embodiments of the utility model, an insulating layer is provided on the lower side of the cold plate 12 facing the battery module 200. The insulating layer may be an independent insulating member provided on the lower side of the cold plate 12, or the insulating layer may be constructed by applying an insulating coating to the lower side of the cold plate 12 and then solidifying it. By providing an insulating layer on the lower side of the cold plate 12, the safety of the battery module 200 can be better improved.

[0050] The present invention also provides a battery pack having the battery box 100 of the above embodiment.

[0051] like Figure 1-Figure 4As shown, the battery pack according to the embodiment of the utility model includes a battery box 100 and a battery module 200. The battery module 200 is installed in the battery box 100. The upper side of the battery module 200 is provided with a heat conductive member opposite to the window, and the upper surface of the heat conductive member is in contact with the lower surface of the cold plate 12. As a result, the cold plate 12 can better exchange heat with the battery module 200 through the heat conductive member. The heat conductive member can be a heat conductive adhesive, which can increase the connection strength between the battery module 200 and the cold plate 12, so that the cold plate 12 can exchange heat with the battery module 200 more stably. At the same time, the battery module 200 can also better support the cold plate 12, thereby improving the structural strength of the cold plate 12.

[0052] According to the battery pack of the present invention, the battery box 100 of the above embodiment is provided, so that the battery module 200 can be well protected. At the same time, through the integration of the box body 11 and the cold plate 12, the integration of the battery box 100 can be well improved, and the material of the box body 11 can be reduced, and the manufacturing cost of the box body 11 can be reduced. At the same time, the design of the battery box 100 and the battery module 200 can also be well optimized, and the flexibility of the battery box 100 is increased.

[0053] The utility model also provides a vehicle having the battery pack of the above embodiment.

[0054] like Figure 1-Figure 5 As shown, the vehicle according to the embodiment of the present invention includes a vehicle body floor and a battery pack, the battery pack is mounted on the lower side of the vehicle body floor, and a thermal insulation foam 32 is arranged between the upper side of the cold plate 12 and the lower side of the vehicle body floor.

[0055] That is to say, when the battery pack is installed on the lower side of the vehicle body floor, since the thermal insulation foam 32 is arranged between the upper side of the cold plate 12 and the lower side of the vehicle body floor, on the one hand, the thermal insulation foam 32 can reduce the temperature of the cold plate 12 from being transferred toward the vehicle body floor, and can reduce the loss of cold or heat of the cold plate 12, thereby ensuring the heat exchange effect on the battery module 200, which is beneficial to the stable operation of the battery module 200. On the other hand, when installing the battery pack, the thermal insulation foam 32 can be compressed, so that the preload force of the battery pack during installation can be better increased, thereby improving the reliability of the battery pack after installation.

[0056] According to the vehicle of the embodiment of the utility model, by being provided with the battery pack of the above embodiment, the battery box 100 can better protect the battery module 200, and at the same time, by integrating the box body 11 and the cold plate 12, the integration of the battery box 100 can be better improved, and at the same time, the material of the box body 11 can be reduced, and the manufacturing cost of the box body 11 can be reduced. At the same time, the design of the battery box 100 and the battery module 200 can also be better optimized, and the flexibility of the battery box 100 is increased.

[0057] The battery box 100, the battery pack and other structures and operations of the vehicle according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0058] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" or "some examples" etc. 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 can be combined in any one or more embodiments or examples in a suitable manner.

[0059] 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, characterized in that: include: An upper box body and a lower box body, wherein the upper box body and the lower box body are detachably connected to construct a storage space for accommodating a battery module, the upper box body includes a box body and a cold plate, the box body includes a top plate and a surrounding plate connected to the outer periphery of the top plate, the top plate has a window opposite to the battery module, and the cold plate is installed on the upper side of the top plate for covering the window.

2. The battery box according to claim 1, characterized in that: The cold plate comprises an upper plate body and a lower plate body. A groove which is bent, extended and opened downward is punched on the lower side of the upper plate body. The lower plate body covers the opening of the groove to form a liquid cooling channel with the upper plate body.

3. The battery box according to claim 2, characterized in that: The side surface of the cold plate is provided with a protrusion connected to an external pipeline, and the liquid inlet and the liquid outlet of the liquid cooling channel are both located on the protrusion.

4. The battery box according to claim 1, characterized in that: A structural adhesive layer is provided between the cold plate and the top plate, and / or the cold plate and the top plate are fixedly connected via a fixing member.

5. The battery box according to claim 1, characterized in that: The upper box body is a composite material box body, or the upper box body is a steel box body.

6. The battery box according to claim 1, characterized in that: A heat insulation layer is provided between the cold plate and the top plate.

7. The battery box according to claim 1, characterized in that: The upper box body is an integral stamping part, or the upper box body includes a plurality of frames, and the plurality of frames are sequentially spliced ​​to construct the upper box body, and the plurality of frames are all integral stamping parts.

8. The battery box according to claim 1, characterized in that: An insulating layer is disposed on the lower side of the cold plate facing the battery module.

9. A battery pack, characterized in that: include: The battery box according to any one of claims 1 to 8; A battery module is installed in the battery box, and a heat conductive member opposite to the window is arranged on the upper side of the battery module, and the upper surface of the heat conductive member is in contact with the lower surface of the cold plate.

10. A vehicle, characterized in that: include: A vehicle body floor and a battery pack as claimed in claim 9, wherein the battery pack is mounted on the lower side of the vehicle body floor, and a thermal insulation foam is provided between the upper side of the cold plate and the lower side of the vehicle body floor.

Images