Multi-layer module structure and battery module

Abstract

The application discloses a kind of multilayer module structure and battery module, wherein multilayer module structure includes box, module layer, module support system and liquid cooling system, first module layer and module support system are fixedly installed on the box, second module layer is installed on module support system, module support system can connect first module layer and second module layer, there is no long bolt of cross-layer connection between first module layer and second module layer, and the overall structure of multilayer module is high, good stability, strong tensile capacity.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power batteries, in particular to a multi-layer module structure and a battery module. BACKGROUND

[0002] With the gradual increase of the requirement of the electric vehicle users on the endurance mileage, more and more vehicle enterprises begin to consider increasing the battery capacity in the limited space, and thus the battery pack containing more than one layer of modules appears, and the design idea of containing two or more layers of modules in the battery pack emerges as the times require. The design of the multi-layer module in the prior art usually adopts long bolts to pass through two layers of modules to realize the connection, and the two layers of modules connected by the long bolts have the risk of being cut off during the automobile running process (the weight of the upper and lower layers of modules is large, and the longer the bolt is, the easier it is to be cut off); secondly, the two layers of modules will give a bending moment to the long bolt during the relative movement, and the long bolt is easy to be damaged under the long-time running in the state of being cut and bent, and the reliability of the bolt is high. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a multi-layer module structure with high overall structural strength, high stability and long battery service life.

[0004] The present application also provides a battery module with the above multi-layer module structure.

[0005] According to the multi-layer module structure of the first aspect of the present application, the multi-layer module structure comprises

[0006] a box body;

[0007] a module layer, the module layer is provided with at least two layers, the module layer comprises a plurality of modules, and the module layer comprises a first module layer and a second module layer;

[0008] a module support system, the module support system is provided with at least one, and the module support system is arranged between the first module layer and the second module layer;

[0009] The first module layer and the module support system are fixedly installed on the box body, the second module layer is installed on the module support system, and the module support system connects the first module layer and the second module layer.

[0010] According to the multi-layer module structure of the first aspect of the present application, at least the following advantages are achieved: the multi-layer module structure of the present application comprises a box, a module layer, a module support system and a liquid cooling system, the first module layer and the module support system are fixedly installed on the box, the second module layer is installed on the module support system, the module support system can connect the first module layer and the second module layer, there is no long bolt for cross-layer connection between the first module layer and the second module layer, the overall structure of the multi-layer module has high strength, good stability and strong tensile capacity.

[0011] According to some embodiments of the present application, the module support system and the first module layer are installed on the box by bolt connection.

[0012] According to some embodiments of the present application, the module support system comprises a mounting block, a liquid cooling plate positioning column and a plurality of copper bar mounting components, the mounting block is arranged on the support plate, the liquid cooling plate positioning column is used for installing the liquid cooling system, and the mounting block is provided with a through hole.

[0013] According to some embodiments of the present application, the module support system comprises a mounting block arranged on the support plate, a liquid cooling plate positioning column used for installing the liquid cooling system and a plurality of copper bar mounting components.

[0014] According to some embodiments of the present application, the copper bar mounting component comprises a copper bar support, a copper bar clamping groove and a copper bar clamping plate, the copper bar support is provided with a wire harness hole, the copper bar support is arranged on the support plate, the copper bar clamping groove is arranged on the copper bar support, and the copper bar clamping plate is arranged on the copper bar clamping groove.

[0015] According to some embodiments of the present application, the liquid cooling system comprises an upper layer liquid cooling component, a lower layer liquid cooling component and a liquid cooling main pipeline, the upper layer liquid cooling component is used for cooling the second module layer, the lower layer liquid cooling component is used for cooling the first module layer, and the liquid cooling main pipeline connects the upper layer liquid cooling component and the lower layer liquid cooling component.

[0016] According to some embodiments of the present application, the upper layer liquid cooling component comprises a plurality of first upper layer liquid cooling plates, a plurality of second upper layer liquid cooling plates and an upper layer liquid cooling branch pipeline, the first upper layer liquid cooling plates and the second upper layer liquid cooling plates are arranged on the upper and lower sides of the second module layer respectively, and the upper layer liquid cooling branch pipeline connects the first upper layer liquid cooling plates and the second upper layer liquid cooling plates.

[0017] According to some embodiments of the present application, the lower liquid cooling component comprises a plurality of first lower liquid cooling plates, a plurality of second lower liquid cooling plates and a lower liquid cooling branch pipe, the first lower liquid cooling plates and the second lower liquid cooling plates are arranged on the upper and lower sides of the first module layer respectively, and the lower liquid cooling branch pipe connects the first lower liquid cooling plates and the second lower liquid cooling plates.

[0018] According to some embodiments of the present application, the module layer is further provided with a module connecting plate, the module connecting plate is arranged between a plurality of the modules and connects the modules.

[0019] According to the second aspect of the present application, a battery module comprises the multi-layer module structure of the first aspect of the present application.

[0020] According to the second aspect of the present application, a battery module has at least the following beneficial effects: the battery module of the second aspect of the present application adopts the multi-layer module structure of the first aspect of the present application, comprises a box body, a module layer and a module support system, the first module layer and the module support system are fixedly installed on the box body, the second module layer is installed on the module support system, the module support system can connect the first module layer and the second module layer, there is no long bolt for cross-layer connection between the first module layer and the second module layer, the overall structural strength of the multi-layer module is high, the stability is good, and the tensile capacity is strong.

[0021] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0023] Figure 1 is a structural schematic diagram of a multi-layer module of an embodiment of the present application;

[0024] Figure 2 is Figure 1 is an enlarged view of A shown in the figure;

[0025] Figure 3 is a structural schematic diagram of a module support system of an embodiment of the present application;

[0026] Figure 4 is Figure 3 is an enlarged view of B shown in the figure;

[0027] Figure 5 is a structural schematic diagram of a copper bar support of an embodiment of the present application;

[0028] Figure 6Fig. 1 is a structural schematic diagram of a liquid cooling system according to an embodiment of the present application;

[0029] Figure 7 Fig. 1 is a structural schematic diagram of a liquid cooling system according to an embodiment of the present application;

[0030] Figure 8 Fig. 1 is a structural schematic diagram of a liquid cooling system according to an embodiment of the present application;

[0031] Figure 9 Fig. 1 is a structural schematic diagram of a liquid cooling system according to an embodiment of the present application. DETAILED DESCRIPTION

[0032] Embodiments of the present application are described in detail below with reference to the accompanying drawings, in which the same or similar elements or elements having the same or similar functions are denoted by the same reference numerals throughout the drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and cannot be understood as a limitation of the present application.

[0033] In the description of the present application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by up, down, front, back, left, right, inner, outer, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application.

[0034] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0035] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In the description of the present application, the meaning of one or more is one or more, the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number. If it is described that the first, second is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0037] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, assembling, fitting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0038] The following refers to Figures 1 to 9 A multi-layer module structure is described in the embodiments of the present application.

[0039] A multi-layer module structure in the embodiments of the present application, as Figures 1 to 9 shown, includes a box body, a module layer, a module support system 100, the module layer is placed in the box body, the module layer is provided with at least two layers, each module layer includes a plurality of modules, the module layer includes a first module layer 410 and a second module layer 420, the module support system 100 is provided with at least one, the module support system 100 is arranged between the first module layer 410 and the second module layer 420, the module support system 100 can connect the first module layer 410 and the second module layer 420, realize the fixation of the first module layer 410 and the second module layer 420. Specifically, in some embodiments, the module layer also includes a third module layer, a fourth module layer, at this time the module support system 100 is correspondingly arranged between the second module layer 420 and the third module layer, between the third module layer and the fourth module layer, and the second module layer 420 and the third module layer, the third module layer and the fourth module layer are connected and fixed.

[0040] The liquid cooling system is arranged on the upper and lower sides of the module layer to cool the module layer. It can be understood that in some embodiments, the liquid cooling system is provided with at least two liquid cooling components, and the two liquid cooling components are arranged on the upper and lower sides of the first module layer 410 and the second module layer 420 respectively, and can cool the first module layer 410 and the second module layer 420 respectively. In some embodiments, the module layer also includes a third module layer, a fourth module layer or more, at this time the liquid cooling system is provided with a plurality of liquid cooling components, and the plurality of liquid cooling components are arranged on the upper and lower sides of the third module layer and the fourth module layer respectively, and can also cool the third module layer and the fourth module layer.

[0041] The first module layer 410 and the module support system 100 are fixedly installed on the box, and the second module layer 420 is installed on the module support system 100 to connect the first module layer 410 and the second module layer 420. The module support system 100 connects the first module layer 410 and the second module layer 420, the module support system 100 and the first module layer 410 are fixedly installed on the box, the second module layer 420 is installed on the module support system 100, the first module layer 410 and the second module layer 420 can be connected and fixed through the module support system 100, there is no long bolt for cross-layer connection between the first module layer 410 and the second module layer 420, the overall structural strength of the multi-layer module is high, the stability is good, and the tensile capacity is strong; the liquid cooling system is arranged on the upper and lower sides of the first module layer 410 and the second module layer 420 to cool the first module layer 410 and the second module layer 420, the working performance of the battery module can be at a suitable temperature for a long time, the service life of the battery module is improved, and the cruising range of the electric vehicle is improved.

[0042] According to some embodiments of the application, the module support system 100 and the first module layer 410 are installed on the box by bolt connection. The module support system 100 and the first module layer 410 are installed on the box, specifically, the module support system 100 and the first module layer 410 are installed on the box by bolt connection, the bolt passes through the module support system 100 and the first module layer 410 and is fixedly assembled on the box to realize the installation of the module support system 100 and the first module layer 410. The module support system 100 is arranged between the first module layer 410 and the second module layer 420, the second module layer 420 is installed on the module support system 100, and the first module layer 410 and the second module layer 420 are fixedly connected through the module support system 100. There is no long bolt for cross-layer connection between the first module layer 410 and the second module layer 420, the overall structural strength of the multi-layer module is high, the stability is good, and the tensile capacity is strong.

[0043] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4According to some embodiments of the present application, the module support system 100 comprises a support plate and a support leg 240 arranged at the side of the support plate, and an insulating plate is arranged at the inner side of the support leg 240. The support plate is arranged to support the second module layer 420 and separate the first module layer 410 and the second module layer 420. The support plate is thin in thickness. Compared with the arrangement of connecting the first module layer 410 and the second module layer 420 by long bolts, the first module layer 410 and the box are fixed by the support plate, which can shorten the length of the bolts, so that the overall structure of the multi-layer module has high strength, good stability and strong tensile capacity. The side of the support plate is provided with the support leg 240, which is arranged outside the first module layer 410. The first module layer 410 is provided with a module end plate fixing hole 411, and the box is provided with a threaded hole. The support leg 240 is provided with a mounting hole 241 through which the bolt passes. The bolt passes through the mounting hole 241 of the support leg 240 and enters the module end plate fixing hole 411, and is threadedly connected with the threaded hole of the box through the module end plate fixing hole 411. The module end plate fixing hole 411 of the first module layer 410 is fully utilized, and no additional parts are needed. The module support system 100, the first module layer 410 and the box are fixedly connected. It can be understood that the second module layer 420 is also provided with a module end plate fixing hole 411. In some embodiments, a second layer of module support system 100 can be arranged on the second module layer 420. The third module layer and the second layer of module support system 100 are fixed on the second module layer 420 through the cooperation of the support leg 240 and the module end plate fixing hole 411, realizing the fixed connection of the third module layer and the second module layer 420 and improving the flexibility of the multi-layer module structure. The support leg 240 cooperates with the first module layer 410, and the bolt is connected with the first module layer 420 through the support leg 240. The arrangement of the support leg 240 can improve the connection strength of the module support system 100 and the first module layer 410. In some embodiments, the support leg 240 is also provided with a reinforcing plate, which can improve the strength of the support leg 240 and make the support leg 240 more stable. The insulating plate is arranged at the inner side of the support leg 240 and is fixed on the support leg 240 by bonding. The arrangement of the insulating plate can prevent the air between the support leg 240 and the module from being struck by high voltage, avoiding the occurrence of arc phenomenon.

[0044] Specifically, in some embodiments, the support plate includes a first support plate 110, a second support plate 120, a third support plate 130, and a fourth support plate 140. The first support plate 110 is designed separately from the second support plate 120, the third support plate 130, and the fourth support plate 140. The second support plate 120, the third support plate 130, and the fourth support plate 140 are welded together to form a whole. The welding can strengthen the connection strength between the second support plate 120, the third support plate 130, and the fourth support plate 140, and make the second support plate 120, the third support plate 130, and the fourth support plate 140 more stable. The first support plate 110 and the fourth support plate 140 form an electrical device mounting platform, which is used for the installation of electrical systems such as BDU and BMS. It can be understood that, in some other embodiments, the first support plate 110, the second support plate 120, the third support plate 130, and the fourth support plate 140 are integrally formed. The integrally formed structure can reduce the production process during the production of the support plate, and improve the production efficiency.

[0045] According to some embodiments of the present application, the module support system 100 includes mounting blocks 230 provided on the support plate, liquid cooling plate positioning columns 220 for mounting the liquid cooling system, and a plurality of copper bar mounting components 200. The mounting blocks 230 are provided with through holes 231. The liquid cooling plate positioning columns 220 are used for the installation and positioning of the liquid cooling plate. During the installation process, first, foam is laid on the support plate, and a heat-conducting pad is laid on the liquid cooling system. Then, the liquid cooling system is installed on the support plate through the liquid cooling plate positioning columns 220. Next, a second module layer 420 is placed on the heat-conducting pad. Finally, the second module layer 420 is fixed on the mounting blocks 230. The mounting blocks 230 are provided with through holes 231. Screws pass through the through holes 231 of the second module layer and the mounting blocks to realize the connection and fixation of the second module layer 420 and the module support system 100. It can be understood that, referring to the drawings and the above description, the mounting blocks 230 are provided on the support plate. Figure 3 and the drawings, the mounting blocks 230 are provided on the support plate. Figure 4 The mounting blocks 230 are provided on the support plate in multiple numbers, and are arranged at different positions of the support plate, so as to fix the second module layer 420 from different positions. The liquid cooling system, the foam, and the heat-conducting pad are arranged between the support plate and the second module layer 420, so as to cool the bottom of the second module layer 420 and ensure the service life of the battery. It should be noted that, in the actual use of the liquid cooling system, the liquid cooling system is not only used for cooling the battery module, but also can be used for heating the battery module to ensure the normal start and use of the battery module in severe cold conditions.

[0046] According to some embodiments of the present application, the copper bar mounting component 200 comprises a copper bar support 213, a copper bar clamping groove 214 and a copper bar clamping plate 215, the copper bar support 213 is arranged on the support plate, the wire harness hole 212 is arranged on the copper bar support 213, the copper bar clamping groove 214 is arranged on the copper bar support 213, and the copper bar clamping plate 215 is arranged on the copper bar clamping groove 214. The wire harness hole 212 is arranged on the copper bar support 213, and the support plate is also welded with a clamp support and a wire harness support for guiding and fixing various wire harnesses. The positioning column is arranged on the copper bar clamping groove 214, the first reserved hole is arranged on the copper bar clamping plate 215, the second reserved hole 211 is arranged on the copper bar support 213, the positioning column of the copper bar clamping groove 214 is inserted into the second reserved hole 211 of the copper bar support 213 during installation, an integer number of copper bars are placed in the copper bar clamping groove 214, the reserved hole of the copper bar clamping plate 215 is inserted into the positioning column of the copper bar clamping groove 214, and finally the copper bar clamping groove 214, the copper bar clamping plate 215 and the copper bar support 213 are connected by bolts. Referring to Figure 5 During the installation process of the copper bar, the copper bar is limited in x-direction translation due to the fixation of the bolts at both ends, the slot of the copper bar support 213 limits the y-direction translation of the copper bar, and after the installation and fixation of the copper bar clamping plate 215, the z-direction translation of the copper bar is limited. At the same time, the closed space formed by the copper bar clamping plate 215 and the slot on the copper bar clamping groove 214 limits the rotational freedom of the copper bar in x, y and z directions. Therefore, the copper bar support 213, the copper bar clamping groove 214 and the copper bar support 213 are completely constrained by the bolts.

[0047] Referring to Figure 2 According to some embodiments of the present application, the liquid cooling system comprises an upper layer liquid cooling component 310, a lower layer liquid cooling component 320 and a liquid cooling main pipeline. The upper layer liquid cooling component 310 is used for cooling the second module layer 420, the lower layer liquid cooling component 320 is used for cooling the first module layer 410, and the liquid cooling main pipeline connects the upper layer liquid cooling component 310 and the lower layer liquid cooling component 320 to realize the delivery of the liquid cooling medium. It can be understood that when a third module layer is arranged above the second module layer 420, the liquid cooling system is provided with a third liquid cooling component arranged on the third module layer, and the third liquid cooling component is used for cooling the third module layer.

[0048] It should be noted that in the actual use of the liquid cooling system, the liquid cooling system is not only used for cooling the battery module, but also can preheat and warm up the battery module to ensure the normal start and use of the battery module in severe cold conditions. Referring to Figure 9In some embodiments, the upper liquid cooling component 310 is arranged below the second module layer 420 to cool or preheat the second module layer 420, and the lower liquid cooling component 320 is arranged below the first module layer 410 to cool or preheat the first module layer 410. The main liquid cooling pipeline 330 connects the upper liquid cooling component 310 and the lower liquid cooling component 320 to directly deliver the cooling liquid to the upper liquid cooling component 310 and the lower liquid cooling component 320.

[0049] With reference to Figure 7 , Figure 8 and Figure 9 According to some embodiments of the present application, the upper liquid cooling component 310 includes a plurality of first upper liquid cooling plates 311, a plurality of second upper liquid cooling plates 312, and an upper liquid cooling sub-pipeline. The first upper liquid cooling plates 311 and the second upper liquid cooling plates 312 are arranged on the upper and lower sides of the second module layer 420, respectively, and the upper liquid cooling sub-pipeline connects the first upper liquid cooling plates 311 and the second upper liquid cooling plates 312. The first upper liquid cooling plates 311 are arranged above the second module layer 420, and the second upper liquid cooling plates 312 are arranged below the second module layer 420 to cool the second module layer 420 from the upper and lower sides. Figure 8 In some embodiments, the first upper liquid cooling plates 311 and the second upper liquid cooling plates 312 include a plurality of split-type liquid cooling plates, which have better mechanical properties and liquid cooling effects. Figure 9 In some embodiments, the first upper liquid cooling plates 311 and the second upper liquid cooling plates 312 are integrated into one-piece liquid cooling plates, which can reduce the production and installation procedures, improve the production and installation efficiency, and are convenient and fast to produce and install. It can be understood that, in some embodiments, the first upper liquid cooling plates 311 are integrated into one-piece liquid cooling plates, and the second upper liquid cooling plates 312 include a plurality of split-type liquid cooling plates, or the first upper liquid cooling plates 311 include a plurality of split-type liquid cooling plates, and the second upper liquid cooling plates 312 are integrated into one-piece liquid cooling plates, which are all within the protection scope of the present application.

[0050] In some embodiments, when the battery module is cooled, the liquid cooling medium first flows through the liquid cooling main pipeline to the second upper liquid cooling plate 312, which is arranged below the second module layer 420, and the second upper liquid cooling plate 312 and the first upper liquid cooling plate 311 are connected by the upper liquid cooling branch pipeline. While the liquid cooling medium is cooled below the second module layer 420, the liquid cooling medium flows through the upper liquid cooling branch pipeline to the first upper liquid cooling plate 311, cools the second module layer 420 above the second module layer 420, and completes the cooling of the upper and lower sides of the second module layer 420. It should be noted that in the actual use of the liquid cooling system, the liquid cooling system is not only used to cool the battery module, but also can be used to heat the battery module to ensure the normal start and use of the battery module in cold conditions. It can be understood that in some embodiments, the liquid cooling system is directly connected to the first upper liquid cooling plate 311 and the second upper liquid cooling plate 312 through the liquid cooling main pipeline, and the liquid cooling medium flows into the first upper liquid cooling plate 311 and the second upper liquid cooling plate 312 at the same time, which can also achieve the cooling of the upper and lower sides of the second module layer 420. It should be noted that each first upper liquid cooling plate 311 and each second upper liquid cooling plate 312 are provided with at least one grounding point, which is connected to the battery pack through a grounding wire to ensure the electrical insulation of the battery pack. In some embodiments, the surfaces of the first upper liquid cooling plate 311 and the second upper liquid cooling plate 312 are provided with an insulating coating to ensure the electrical insulation of the battery pack. It can be understood that in some embodiments, the second module layer 420 is provided with a cold pipe avoiding hole 412, and the upper liquid cooling branch pipeline connects the first upper liquid cooling plate 311 and the second upper liquid cooling plate 312 through the cold pipe avoiding hole 412, so that the structure of the multi-layer module is more compact, the length of the cold pipe is shortened, and the cost is saved.

[0051] Referring to Figure 7 , Figure 8 and Figure 9 , according to some embodiments of the present application, the lower liquid cooling component 320 includes a plurality of first lower liquid cooling plates 321, a plurality of second lower liquid cooling plates 322, and a lower liquid cooling branch pipeline, the first lower liquid cooling plates 321 and the second lower liquid cooling plates 322 are arranged on the upper and lower sides of the first module layer 410 respectively, and the lower liquid cooling branch pipeline connects the first lower liquid cooling plates 321 and the second lower liquid cooling plates 322. The first lower liquid cooling plate 321 is arranged above the first module layer 410, and the second lower liquid cooling plate 322 is arranged below the first module layer 410, which can cool the first module layer 410 from the upper and lower sides. It can be understood that, referring to Figure 8 , in some embodiments, the first lower liquid cooling plate 321 and the second lower liquid cooling plate 322 include a plurality of liquid cooling plates designed in a split manner, which have better mechanical properties and liquid cooling effects. Referring to Figure 9In some embodiments, the first lower liquid cooling plate 321 and the second lower liquid cooling plate 322 are arranged as an integrated liquid cooling plate, which can reduce the production and installation process, improve the production efficiency, and is convenient and fast to produce and install. It can be understood that, in some embodiments, the first lower liquid cooling plate 321 is arranged as an integrated liquid cooling plate, and the second lower liquid cooling plate 322 includes a plurality of liquid cooling plates designed in a split type, or the first lower liquid cooling plate 321 includes a plurality of liquid cooling plates designed in a split type, and the second lower liquid cooling plate 322 is arranged as an integrated liquid cooling plate, which are all within the protection scope of the present application. In some embodiments, when the battery module is cooled, the liquid cooling medium first flows to the second lower liquid cooling plate 322 through the liquid cooling main pipeline, the second lower liquid cooling plate 322 is arranged below the first module layer 410, and the second lower liquid cooling plate 322 and the first lower liquid cooling plate 321 are connected through the lower liquid cooling branch pipeline. While the liquid cooling medium cools below the first module layer 410, the liquid cooling medium flows to the first lower liquid cooling plate 321 through the lower liquid cooling branch pipeline, cools above the first module layer 410, and completes the cooling of the first module layer 410 on the upper and lower sides. It should be noted that, in the actual use of the liquid cooling system, the liquid cooling system is not only used for cooling the battery module, but also can heat the battery module to ensure the normal start and use of the battery module in a severe cold condition. It can be understood that, in some embodiments, the liquid cooling system is directly connected with the first lower liquid cooling plate 321 and the second lower liquid cooling plate 322 through the liquid cooling main pipeline, and the liquid cooling medium flows into the first lower liquid cooling plate 321 and the second lower liquid cooling plate 322 at the same time, which can also achieve the cooling of the first module layer 410 on the upper and lower sides. It should be noted that each first lower liquid cooling plate and each second lower liquid cooling plate are provided with at least one grounding point, which is connected with the battery pack through a grounding wire to ensure the electrical insulation of the battery pack. In some embodiments, the surface of the first lower liquid cooling plate and the second lower liquid cooling plate is provided with an insulating coating to ensure the electrical insulation of the battery pack. It can be understood that, in some embodiments, the first module layer 410 is provided with a cold pipe avoiding hole 412, the lower liquid cooling branch pipeline is connected with the first lower liquid cooling plate 321 and the second lower liquid cooling plate 322 through the cold pipe avoiding hole 412, the structure of the multi-layer module is more compact, the length of the cold pipe is shortened, and the cost is saved.

[0052] According to some embodiments of the present application, the module layer is further provided with a module connecting plate arranged between the modules to connect the modules. The module layer includes a plurality of modules, and the module connecting plate connects and fixes the modules in the module layer. The module connecting plate arranged between the modules can improve the rigidity of the modules after being grouped, avoid resonance problems caused by road excitation, and make the modules in the module layer more stable.

[0053] A battery module according to an embodiment of the second aspect of the application comprises the multi-layer module structure according to the first aspect of the application. The battery module according to the second aspect of the application comprises a box body, a module layer, a module support system 100 and a liquid cooling system. The first module layer 410 and the module support system 100 are fixedly installed on the box body. The second module layer 420 is installed on the module support system 100. The module support system 100 can connect the first module layer 410 and the second module layer 420. There is no long bolt for connection between the first module layer 410 and the second module layer 420. The overall structure of the multi-layer module has high strength, good stability and strong tensile capacity. The liquid cooling system is arranged on the upper and lower sides of the first module layer 410 and the second module layer 420 to cool the first module layer 410 and the second module layer 420. The working performance of the battery module can be at a suitable temperature for a long time, thereby prolonging the service life of the battery module and improving the cruising range of the electric vehicle.

[0054] The embodiments of the application are described in detail above with reference to the drawings, but the application is not limited to the above embodiments, and each embodiment does not contain only one independent technical solution. The description is provided for clarity only. Those skilled in the art should consider the description as a whole. The technical solutions in each embodiment can be properly combined. Within the knowledge of those skilled in the art, various changes can be made without departing from the purpose of the application to form other embodiments that can be understood by those skilled in the art. Therefore, the above description is only a preferred embodiment of the application, and is not intended to limit the scope of the application. Any equivalent change made within the scope of the claims of the application is within the protection scope of the claims of the application.

Claims

1. A multi-tiered modular structure, characterized by, The utility model relates to a kind of multi-layer module structure, including: Box body; Module layer, the module layer is provided with at least two layers, the module layer includes several modules, the module layer includes first module layer and second module layer; Module support system, the module support system is provided with at least one, the module support system is arranged between the first module layer and the second module layer; Wherein, the first module layer and the module support system are fixedly installed on the box body, the second module layer is installed on the module support system, and the module support system connects the first module layer and the second module layer. The module support system includes support plate and support leg arranged on the side of the support plate, the module is provided with end plate fixing hole, the support leg is provided with mounting hole, and the end plate fixing hole is connected with the mounting hole by bolt to fix the support plate on the module. The inner side of the support leg is provided with insulating plate, and the insulating plate is bonded on the support leg. Further including liquid cooling system, the module support system includes mounting block, liquid cooling plate positioning column and several copper bar mounting components, the mounting block is arranged on the support plate, the liquid cooling plate positioning column is used to install the liquid cooling system, and the mounting block is provided with through hole;The copper bar mounting component includes copper bar support, copper bar clamping groove and copper bar clamping plate, wire harness hole is arranged on the copper bar support, the copper bar support is arranged on the support plate, the copper bar clamping groove is arranged on the copper bar support, and the copper bar clamping plate is arranged on the copper bar clamping groove.

2. A multi-layer module structure according to claim 1, characterized in that The liquid cooling system includes upper layer liquid cooling component, lower layer liquid cooling component and liquid cooling main pipeline, the upper layer liquid cooling component is used to cool the second module layer, the lower layer liquid cooling component is used to cool the first module layer, and the liquid cooling main pipeline connects the upper layer liquid cooling component and the lower layer liquid cooling component.

3. A multi-layer module structure according to claim 2, wherein The upper layer liquid cooling component includes several first upper layer liquid cooling plates, several second upper layer liquid cooling plates and upper layer liquid cooling branch pipeline, the first upper layer liquid cooling plate and the second upper layer liquid cooling plate are arranged on the upper and lower sides of the second module layer respectively, and the upper layer liquid cooling branch pipeline connects the first upper layer liquid cooling plate and the second upper layer liquid cooling plate.

4. The multi-layer module structure of claim 2, wherein, The lower layer liquid cooling component includes several first lower layer liquid cooling plates, several second lower layer liquid cooling plates and lower layer liquid cooling branch pipeline, the first lower layer liquid cooling plate and the second lower layer liquid cooling plate are arranged on the upper and lower sides of the first module layer respectively, and the lower layer liquid cooling branch pipeline connects the first lower layer liquid cooling plate and the second lower layer liquid cooling plate.

5. The multi-layer module structure of claim 1, wherein, The module layer is also provided with module connecting plate, the module connecting plate is arranged between several modules, and the modules are connected.

6. A battery module, characterized by Including a kind of multi-layer module structure as claimed in any one of claims 1 to 5.

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