Battery box body with double-layer liquid cooling structure and power battery

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a battery box body with a double-layer liquid cooling structure and a power battery. The battery box with the double-layer liquid cooling structure comprises a box body, a module support and a first liquid cooling pipe, the box body is provided with a containing cavity and comprises a liquid cooling bottom plate, the liquid cooling bottom plate is arranged on the bottom side of the containing cavity in a surrounding mode, and a bottom plate liquid cooling channel used for circulation of cooling liquid is formed in the liquid cooling bottom plate; the module support is arranged in the containing cavity and comprises a liquid cooling supporting plate, a supporting plate liquid cooling channel used for circulating cooling liquid is formed in the liquid cooling supporting plate, the liquid cooling supporting plate and the liquid cooling bottom plate are arranged at an interval, and the interval between the liquid cooling bottom plate and the liquid cooling supporting plate is used for containing a first battery module; one side, deviating from the liquid cooling bottom plate, of the liquid cooling supporting plate is used for placing a second battery module; the first liquid cooling pipe is communicated with the bottom plate liquid cooling channel and the supporting plate liquid cooling channel.

Description

TECHNICAL FIELD

[0001] The utility model belongs to battery technical field, concretely relates to a battery box of double -deck liquid cooling structure and power battery. BACKGROUND

[0002] With the rapid development of new energy automobile industry, people's demand for new energy automobile's endurance mileage and safety is higher and higher. Electric automobile under long time work, battery pack will emit a lot of heat, especially under outdoor high temperature condition, it can cause safety accident. Therefore, the liquid cooling design and weight reduction design of power battery system are extremely important.

[0003] Due to space limitation, sometimes battery pack needs double -deck module design to improve space utilization, satisfy the demand of whole car. The double -deck module battery pack on the market has the problems of complex structure, difficult installation, difficult to integrate cooling system, many structural parts and large battery quality.

[0004] Therefore, it is urgent to provide a battery box of double -deck liquid cooling structure with simple structure and good heat dissipation effect to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model discloses a battery box of double -deck liquid cooling structure with simple structure and good heat dissipation effect. The purpose is realized through the following technical scheme:

[0006] The utility model discloses a battery box of double -deck liquid cooling structure, comprising:

[0007] The box body has a containing cavity, and the box body includes a liquid cooling bottom plate, the liquid cooling bottom plate is arranged on the bottom side of the containing cavity, and the liquid cooling bottom plate is provided with a bottom plate liquid cooling channel for circulating cooling liquid;

[0008] The module support is arranged in the containing cavity, and the module support includes a liquid cooling support plate, the liquid cooling support plate is provided with a support plate liquid cooling channel for circulating cooling liquid, the liquid cooling support plate and the liquid cooling bottom plate are arranged at intervals, the interval between the liquid cooling bottom plate and the liquid cooling support plate is used for placing a first battery module, and the side, away from the liquid cooling bottom plate, of the liquid cooling support plate is used for placing a second battery module;

[0009] The first liquid cooling pipe is connected with the bottom plate liquid cooling channel and the support plate liquid cooling channel.

[0010] The battery box body with the double-layer liquid cooling structure in the technical scheme can support two layers of battery modules and perform liquid cooling, thereby simplifying the structure of the battery box body.

[0011] In addition, the battery box body with the double-layer liquid cooling structure has the following additional technical features.

[0012] In some embodiments of the utility model, the box body is provided with a first water nozzle and a second water nozzle communicating with the bottom plate liquid cooling channel, the liquid cooling bottom plate is provided with a bottom plate joint communicating with the bottom plate liquid cooling channel, the module support is provided with a support plate first joint and a support plate second joint respectively communicating with the support plate liquid cooling channel, the first water nozzle communicates with the support plate second joint through a second liquid cooling pipe, and the support plate first joint communicates with the bottom plate joint through the first liquid cooling pipe.

[0013] In some embodiments of the utility model, the box body further comprises a first panel, a second panel and two liquid cooling edge beams, the two liquid cooling edge beams are connected to opposite sides of the liquid cooling bottom plate respectively, the liquid cooling edge beams are provided with edge beam liquid cooling channels for circulating cooling liquid, the first ends of the two liquid cooling edge beams are connected through the first panel, the second ends of the two liquid cooling edge beams are connected through the second panel, the first panel and the second panel are connected with the liquid cooling bottom plate respectively, and the first water nozzle and the second water nozzle are arranged on the first panel.

[0014] In some embodiments of the utility model, the box body is provided with a support portion inside, the bottom of the support portion is connected with the liquid cooling bottom plate, and the top of the support portion is connected with the module support.

[0015] In some embodiments of the utility model, the support portion is an aluminum profile structure.

[0016] In some embodiments of the utility model, the liquid cooling bottom plate is provided with two first cross beams, the two first cross beams are arranged in parallel, the first battery module is arranged between the two first cross beams, and the support portion is located on the side of the first cross beam away from the first battery module.

[0017] In some embodiments of the utility model, the module support further comprises two connecting portions, the two connecting portions are arranged on opposite sides of the liquid cooling support plate respectively, and the connecting portions are used for connecting with the support portion.

[0018] In some embodiments of the utility model, the connecting part and the supporting part are connected through bolts.

[0019] In some embodiments of the utility model, the module support further comprises two second cross beams, the two second cross beams are respectively arranged on opposite sides of the liquid cooling support plate, and the second cross beam and the connecting part are arranged perpendicularly.

[0020] In the second aspect of the utility model, a power battery is provided, which comprises a first battery module, a second battery module and the battery box with the double-layer liquid cooling structure in the above embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0021] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of preferred embodiments, and are not meant to limit the present utility model. Moreover, the same reference numerals are used throughout the various drawings to designate identical parts. In the drawings:

[0022] Figure 1 A structural schematic view of the battery box with the double-layer liquid cooling structure according to the embodiments of the utility model is schematically shown;

[0023] Figure 2 An exploded view of the battery box with the double-layer liquid cooling structure according to the embodiments of the utility model is schematically shown;

[0024] Figure 3 A structural schematic view of the box body according to the embodiments of the utility model is schematically shown;

[0025] Figure 4 A structural schematic view of the module support according to the embodiments of the utility model is schematically shown.

[0026] In the drawings, various reference numerals represent the following:

[0027] 100, box body; 110, liquid cooling bottom plate; 111, bottom plate joint; 120, liquid cooling edge beam; 121, liquid inlet; 122, liquid outlet; 130, first panel; 131, first water nozzle; 132, second water nozzle; 140, second panel; 150, supporting part; 160, first cross beam;

[0028] 200, module support; 210, liquid cooling support plate; 220, extension part; 221, support plate first joint; 222, support plate second joint; 230, second cross beam; 240, connecting part; 250, plug;

[0029] 300, first liquid cooling pipe;

[0030] 400. second liquid cooling tube. DETAILED DESCRIPTION

[0031] Example embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings. While example embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in many forms and should not be construed as limited to the implementations set forth herein. Rather, these implementations are provided as example so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0032] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and the like are to be construed to be inclusive (i.e., to include both instances of open ended terms and instances of terms limiting to a specific number) unless otherwise indicated as otherwise limited by context. The methods described herein can be implemented as a method, an apparatus, a system, a computer program product, computer-readable medium, computer program, or a combination thereof.

[0033] Although the terms first, second, third, and the like can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0034] For ease of description, spatial relative terms can be used herein to describe a relationship of one element or feature to another element or feature as shown in the drawings, such as "inner", "outer", "inside", "outside", "lower", "below", "upper", "above", etc. Such spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over, an element described as "below" or "under" another element or feature would then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can encompass both an orientation of above and below. Embodiments of the present application can include various steps, or techniques. The steps, or techniques, can be interchanged with one another without departing from the scope of the present application.

[0035] Figure 1 A structural schematic diagram of a battery box with a double-layer liquid cooling structure according to an embodiment of the present application is schematically shown. Figure 2 An exploded view of a battery box with a double-layer liquid cooling structure according to an embodiment of the present application is schematically shown. Figure 1 And Figure 2 As shown in the drawings, the present application provides a battery box with a double-layer liquid cooling structure, which comprises a box body 100, a module support 200, and a first liquid cooling pipe 300. The box body 100 has a receiving cavity. The box body 100 comprises a liquid cooling bottom plate 110, which is arranged around the bottom side of the receiving cavity. The liquid cooling bottom plate 110 is provided with a bottom plate liquid cooling channel for flowing cooling liquid. The module support 200 is arranged in the receiving cavity. The module support 200 comprises a liquid cooling support plate 210, which is provided with a support plate liquid cooling channel for flowing cooling liquid. The liquid cooling support plate 210 and the liquid cooling bottom plate 110 are arranged in a spaced manner. The space between the liquid cooling bottom plate 110 and the liquid cooling support plate 210 is used for placing a first battery module. The side of the liquid cooling support plate 210, which is away from the liquid cooling bottom plate 110, is used for placing a second battery module. The first liquid cooling pipe 300 connects the bottom plate liquid cooling channel of the liquid cooling bottom plate 110 and the support plate liquid cooling channel of the liquid cooling support plate 210.

[0036] The battery box with a double-layer liquid cooling structure in the present technical solution is provided with the liquid cooling bottom plate 110 and the liquid cooling support plate 210. On the one hand, the two layers of battery modules can be supported. On the other hand, the liquid cooling function can be realized, so as to simplify the structure of the battery box. The liquid cooling bottom plate 110 and the liquid cooling support plate 210 are directly connected in series through the first liquid cooling pipe 300, so that the pipeline inside the battery box is simplified. Due to the structural simplification, the battery box with a double-layer liquid cooling structure has the advantages of convenient installation, light weight, and high space utilization, etc.

[0037] Optionally, the box body 100 and the module support 200 adopt an extruded aluminum profile process to integrate the liquid cooling channel, which has simple production process, high structural strength and light weight. In the embodiment, the liquid cooling bottom plate 110 is substantially square, and part of the area is used to place the first battery module, and part of the area is used to place the battery management system and other components. The first battery module and the second battery module are arranged opposite in the vertical direction, and the liquid cooling support plate 210 is located between the first battery module and the second battery module. Understandably, the shape of the liquid cooling support plate 210 is set according to the structure of the battery module, and in the embodiment, the liquid cooling support plate 210 is substantially rectangular.

[0038] Further, the box body 100 is provided with a first water nozzle 131 and a second water nozzle 132 communicating with the bottom plate liquid cooling channel, the liquid cooling bottom plate 110 is provided with a bottom plate joint 111 communicating with the bottom plate liquid cooling channel, and the module support 200 is provided with a support plate first joint 221 and a support plate second joint 222 respectively communicating with the support plate liquid cooling channel. The first water nozzle 131 is communicated through the second liquid cooling pipe 400 and the support plate second joint 222, and the support plate first joint 221 is communicated through the first liquid cooling pipe 300 and the bottom plate joint 111.

[0039] By setting the support plate first joint 221, the support plate second joint 222 and the bottom plate joint 111, the connection of the first liquid cooling pipe 300 and the second liquid cooling pipe 400 can be conveniently carried out, so as to form a liquid cooling channel in the interior of the battery box. By setting the first water nozzle 131 and the second water nozzle 132, the liquid cooling channel in the interior of the battery box and the system supplying cooling liquid outside can be conveniently connected, and a liquid cooling loop is formed. In some embodiments, the first water nozzle 131 can be used as an inlet water nozzle, and the second water nozzle 132 can be used as an outlet water nozzle. In this case, the cooling liquid enters the second liquid cooling pipe 400 through the first water nozzle 131, flows through the second liquid cooling pipe 400, enters the support plate liquid cooling channel through the support plate second joint 222, fills the liquid cooling support plate 210, enters the first liquid cooling pipe 300 through the support plate first joint 221, enters the bottom plate liquid cooling channel through the first liquid cooling pipe 300 and the bottom plate joint 111, and flows out from the second water nozzle 132 after flowing through the liquid cooling bottom plate 110. In other embodiments, the second water nozzle 132 can be used as an inlet water nozzle, and the first water nozzle 131 can be used as an outlet water nozzle. In this case, the cooling liquid enters the bottom plate liquid cooling channel through the second water nozzle 132, fills the liquid cooling bottom plate 110, enters the first liquid cooling pipe 300 through the bottom plate joint 111, flows into the support plate liquid cooling channel through the support plate first joint 221, then enters the second liquid cooling pipe 400 through the support plate second joint 222, and flows out from the first water nozzle 131 after flowing through the second liquid cooling pipe 400, so as to realize heat exchange with the battery module.

[0040] Optionally, the first water nozzle 131 and the second water nozzle 132 can be fixed to the box body 100 by welding, so as to ensure the sealing performance and structural strength of the box body 100. The support plate first joint 221 and the support plate second joint 222 are connected to the liquid cooling support plate 210 by welding, respectively. Optionally, the bottom plate joint 111 is connected to the liquid cooling bottom plate 110 by welding.

[0041] Optionally, the first liquid cooling pipe 300 and the second liquid cooling pipe 400 can be corrugated pipes. The corrugated pipe has high strength and rigidity, can withstand large pressure and load, is not easy to deform and break; it is made of stainless steel material, can resist corrosion and erosion of various chemicals, has a long service life; and the corrugated pipe has a certain flexibility and bending capacity, can adapt to various complex pipeline layout and installation requirements; in addition, the corrugated pipe has good sealing performance, can effectively prevent leakage and pollution, and ensure the safe and stable operation of the pipeline. Optionally, the first liquid cooling pipe 300 and the second liquid cooling pipe 400 have quick plug joints at the ends, which can be conveniently plugged with each water nozzle or each joint, saving time and labor during assembly. Optionally, the first liquid cooling pipe 300 and the second liquid cooling pipe 400 are located above the liquid cooling support plate 210 and are arranged close to the two sides of the box body 100, respectively, so as to provide space for the installation of the second battery module.

[0042] Further, Figure 3 The structure of the box body 100 according to the embodiment of the present application is schematically shown. Referring to Figures 1 to 3 The box body 100 further comprises a first panel 130, a second panel 140 and two liquid cooling edge beams 120, the two liquid cooling edge beams 120 are connected to the opposite sides of the liquid cooling bottom plate 110, respectively, the liquid cooling edge beam 120 is provided with an edge beam liquid cooling channel for circulating cooling liquid, the first ends of the two liquid cooling edge beams 120 are connected by the first panel 130, the second ends of the two liquid cooling edge beams 120 are connected by the second panel 140, the first panel 130 and the second panel 140 are connected with the liquid cooling bottom plate 110, respectively, and the first water nozzle 131 and the second water nozzle 132 are arranged on the first panel 130.

[0043] By setting the liquid cooling side beam 120, the side of the battery module can be cooled, thereby improving the overall cooling effect and ensuring that the power battery has good use performance and a long service life. Optionally, the top of the liquid cooling side beam 120 is spaced apart from the liquid inlet 121 and the liquid outlet 122, and the liquid inlet 121 and the liquid outlet 122 are respectively communicated with the side beam liquid cooling channel in the liquid cooling side beam 120. Optionally, the liquid cooling side beam 120 and the liquid cooling bottom plate 110 are welded. The first panel 130 and the second panel 140 are respectively welded with the liquid cooling side beam 120 and respectively welded with the liquid cooling bottom plate 110. Optionally, the welding method can be friction stir welding, which has the advantages of high welding quality, high process efficiency and environmental protection in the welding process.

[0044] Further, the inside of the box body 100 is provided with a support part 150, the bottom of the support part 150 is connected with the liquid cooling bottom plate 110, and the top of the support part 150 is connected with the module support 200.

[0045] Optionally, the support part 150 can provide sufficient space between the liquid cooling support plate 210 and the liquid cooling bottom plate 110 to arrange the first battery module, preventing the first battery module from being squeezed by the liquid cooling support plate 210. Optionally, the support part 150 is a block structure, and the height thereof can be greater than the height of the first battery module. In this embodiment, the support part 150 is provided with four, and the four support parts 150 are respectively arranged at the four corners of the module support 200, thereby stably supporting the module support 200.

[0046] Further, the support part 150 is an aluminum profile structure. The use of aluminum profiles in the support part 150 not only ensures the bearing capacity and reliability, but also reduces the overall weight of the battery box. Optionally, the bottom of the support part 150 is welded to the liquid cooling bottom plate 110.

[0047] Further, the liquid cooling bottom plate 110 is provided with two first cross beams 160, the two first cross beams 160 are arranged in parallel, and the two first cross beams 160 are used to place the first battery module, and the support part 150 is located on the side of the first cross beam 160 away from the first battery module.

[0048] The two first cross beams 160 play a positioning role for the first battery module. When assembling, the first battery module is clamped between the two first cross beams 160 to ensure the stability of the first battery module. Optionally, the first cross beam 160 is connected to the liquid cooling bottom plate 110 by welding. Optionally, the first cross beam 160 and the liquid cooling side beam 120 are arranged perpendicularly, and the two first cross beams 160 and the two liquid cooling side beams 120 enclose a rectangular area for placing the first battery module.

[0049] Further, Figure 4A structural schematic view of the module support 200 according to the embodiment of the utility model is shown schematically. Referring to Figures 1 to 3 The module support 200 further comprises two connecting portions 240, which are respectively arranged on opposite sides of the liquid cooling support plate 210, and the connecting portions 240 are used for connecting with the support portion 150.

[0050] In the embodiment, the connecting portion 240 has a long strip structure, and the extending direction thereof is perpendicular to the length direction of the first cross beam 160. The end position of the connecting portion 240 is used for connecting with the support portion 150.

[0051] Further, the connecting portion 240 and the support portion 150 are connected through bolts.

[0052] Exemplarily, the connecting portion 240 is provided with a threaded sleeve, and the bolt can pass through the threaded sleeve and be connected with the support portion 150. Alternatively, the threaded sleeve and the connecting portion 240 are welded. Through the bolt connection, the assembly is convenient, and the assembly efficiency can be effectively improved.

[0053] Alternatively, the module support 200 further comprises two second cross beams 230, which are respectively arranged on opposite sides of the liquid cooling support plate 210, and the second cross beams 230 are arranged perpendicularly to the connecting portions 240.

[0054] Alternatively, the second cross beam 230 can be arranged correspondingly to the first cross beam 160. The second cross beam 230 and the connecting portion 240 enclose an area for placing the second battery module. The second cross beam 230 is used for limiting the position of the second battery module, so as to ensure that the second battery module is stably mounted on the liquid cooling support plate 210.

[0055] Further, two extending portions 220 are arranged on the side of the liquid cooling support plate 210 where the second cross beam 230 is arranged. Alternatively, a support plate first joint 221 and a support plate second joint 222 are respectively arranged on the two extending portions 220. The extending portion 220 is hollow inside and communicates with the inside of the liquid cooling support plate 210. On the opposite side of the extending portion 220, the opening of the liquid cooling support plate 210 is plugged by a plug 250. Alternatively, the plug 250 and the extending portion 220 are connected with the liquid cooling support plate 210 through welding.

[0056] Further, the technical solution further provides a power battery, which comprises a first battery module, a second battery module and the above-mentioned battery box body with a double-layer liquid cooling structure.

[0057] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A battery box with a double-layer liquid-cooled structure, characterized in that, include: The box body (100) has a receiving cavity. The box body (100) includes a liquid-cooled bottom plate (110), which surrounds the bottom side of the receiving cavity. The liquid-cooled bottom plate (110) is provided with a bottom plate liquid-cooled channel for circulating coolant. A module support (200) is disposed in the receiving cavity. The module support (200) includes a liquid-cooled support plate (210). The liquid-cooled support plate (210) is provided with a support plate liquid-cooled channel for the flow of coolant. The liquid-cooled support plate (210) and the liquid-cooled base plate (110) are spaced apart. The space between the liquid-cooled base plate (110) and the liquid-cooled support plate (210) is used to place a first battery module. The side of the liquid-cooled support plate (210) facing away from the liquid-cooled base plate (110) is used to place a second battery module. The first liquid cooling pipe (300) is connected to the liquid cooling channel of the base plate and the liquid cooling channel of the support plate.

2. The battery housing with a double-layer liquid-cooled structure according to claim 1, characterized in that, The housing body (100) is provided with a first water nozzle (131) and a second water nozzle (132) connected to the liquid cooling channel of the bottom plate. The liquid cooling bottom plate (110) is provided with a bottom plate connector (111) connected to the liquid cooling channel of the bottom plate. The module bracket (200) is provided with a first support plate connector (221) and a second support plate connector (222) connected to the liquid cooling channel of the support plate respectively. The first water nozzle (131) is connected to the second support plate connector (222) through a second liquid cooling pipe (400). The first support plate connector (221) is connected to the bottom plate connector (111) through the first liquid cooling pipe (300).

3. The battery housing with a double-layer liquid-cooled structure according to claim 2, characterized in that, The housing body (100) also includes a first panel (130), a second panel (140), and two liquid-cooled side beams (120). The two liquid-cooled side beams (120) are respectively connected to opposite sides of the liquid-cooled base plate (110). The liquid-cooled side beams (120) are provided with side beam liquid-cooled channels for circulating coolant. The first ends of the two liquid-cooled side beams (120) are connected through the first panel (130), and the second ends of the two liquid-cooled side beams (120) are connected through the second panel (140). The first panel (130) and the second panel (140) are respectively connected to the liquid-cooled base plate (110). The first water nozzle (131) and the second water nozzle (132) are both provided on the first panel (130).

4. The battery housing with a double-layer liquid-cooled structure according to any one of claims 1-3, characterized in that, The housing body (100) has a support part (150) inside. The bottom of the support part (150) is connected to the liquid-cooled base plate (110), and the top of the support part (150) is connected to the module bracket (200).

5. The battery housing with a double-layer liquid-cooled structure according to claim 4, characterized in that, The support part (150) is an aluminum profile structure.

6. The battery housing with a double-layer liquid-cooled structure according to claim 4, characterized in that, The liquid-cooled base plate (110) is provided with two first crossbeams (160), which are arranged in parallel. The first battery module is placed between the two first crossbeams (160), and the support part (150) is located on the side of the first crossbeam (160) away from the first battery module.

7. The battery housing with a double-layer liquid-cooled structure according to claim 4, characterized in that, The module bracket (200) also includes two connecting parts (240), which are respectively disposed on opposite sides of the liquid-cooled support plate (210). The connecting parts (240) are used to connect with the support part (150).

8. The battery housing with a double-layer liquid-cooled structure according to claim 7, characterized in that, The connecting part (240) and the supporting part (150) are connected by bolts.

9. The battery housing with a double-layer liquid-cooled structure according to claim 7, characterized in that, The module bracket (200) also includes two second crossbeams (230), which are respectively disposed on opposite sides of the liquid-cooled support plate (210). The second crossbeams (230) and the connecting part (240) are arranged vertically.

10. A power battery, characterized in that, The power battery includes a first battery module, a second battery module, and a battery housing with a double-layer liquid-cooled structure according to any one of claims 1-9.

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