Bottom plate structure for electric box body and electric box body

Abstract

The utility model provides a bottom plate structure for an electric box body and the electric box body. The bottom plate structure comprises a bottom plate, a plurality of grid strips and a heat dissipation layer, and the bottom plate is provided with a containing area used for installing a battery module; the grid strips are arranged in the accommodating area at intervals, heat dissipation channels for gas circulation are formed among the grid strips, the battery modules are supported on the grid strips, and the gas in the heat dissipation channels exchanges heat with the battery modules for heat dissipation; the heat dissipation layer is located on the inner wall of the heat dissipation channel. According to the invention, the problem of poor heat dissipation effect of the battery heat management equipment in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the field of battery thermal management, and in particular to a bottom plate structure for an electric box body and an electric box body. Background Art

[0002] The current lower box integrated air duct is usually made of aluminum alloy material and is formed in one piece through an extrusion process, so it has good thermal conductivity and high strength, and has no internal joints, which can form a straight and smooth air duct, reduce air flow resistance, avoid wind speed attenuation, and has good sealing, which can reduce air volume loss and improve heat dissipation efficiency.

[0003] However, the above structure has the following problems: 1. The battery module and the lower box are separated by a partition. In order to ensure heat dissipation, it is necessary to apply thermal conductive structural adhesive on the entire surface of the partition to form a heat conduction path. This not only has a poor heat dissipation effect, but also uses a large amount of thermal conductive structural adhesive, which makes the cost high; 2. Although the one-piece extruded aluminum lower box has a simple structure, it requires an aluminum extrusion mold to be opened in advance and the cost is not low. Utility Model Content

[0004] The main purpose of the utility model is to provide a bottom plate structure for an electric box body and an electric box body, so as to solve the problem of poor heat dissipation effect of battery thermal management equipment in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, there is provided a bottom plate structure for an electrical box body, comprising: a bottom plate, a plurality of grid bars and a heat dissipation layer, the bottom plate having a storage area for installing a battery module; the grid bars are arranged at intervals in the storage area, and heat dissipation channels for gas circulation are formed between the grid bars, the battery module is supported on the grid bars, and the gas in the heat dissipation channel exchanges heat with the battery module to dissipate heat; the heat dissipation layer is located on the inner wall of the heat dissipation channel.

[0006] Furthermore, an upper opening is provided on the heat dissipation channel, and a heat dissipation layer is provided on the side wall and the bottom wall of the heat dissipation channel.

[0007] Furthermore, the heat dissipation layer is a heat dissipation coating layer.

[0008] Furthermore, the length direction of the grid bars is parallel to the width direction of the battery module; and / or the bottom plate and the grid bars are separately provided, and the materials of the bottom plate and the grid bars are the same or different.

[0009] Furthermore, the base plate structure also includes an air outlet member having an air outlet duct. The air outlet member is arranged above the base plate, and the air outlet duct is connected to the heat dissipation channel. The airflow after heat exchange in the heat dissipation channel is discharged through the air outlet duct.

[0010] Furthermore, the air outlet duct includes a first section and a second section connected in sequence, and an angle less than 180 degrees is formed between the top surface of the first section and the top surface of the second section. The ends of the first section and the second section both have air outlets, and from the connection point to the direction of the air outlet, the top surface of the first section and the top surface of the second section are inclined upward.

[0011] Furthermore, the accommodating area includes a battery cell accommodating area for accommodating the battery module and an air duct installation area for docking the air outlet piece. The grid bars are arranged in the battery cell accommodating area and the air duct installation area. There are one or more battery cell accommodating areas. When there are multiple battery cell accommodating areas, battery cell accommodating areas are arranged on opposite sides of the air duct installation area along the length direction of the heat dissipation channel.

[0012] Furthermore, the base plate structure also includes a guide member, which is arranged in the heat dissipation channel and located directly below the air outlet duct. The guide member has a flat or curved guide surface. The gas in the heat dissipation channel changes its flow direction through the guide surface and enters the air outlet duct upward.

[0013] Furthermore, the bottom plate structure also includes a sealing reinforcement member, which is arranged above the heat dissipation channel and blocks the opening above the heat dissipation channel that is not connected to the battery module or is not provided with an air outlet member.

[0014] According to another aspect of the utility model, there is provided an electrical box body, comprising: the aforementioned bottom plate structure; a top plate structure, the top plate structure being located above the bottom plate structure, and a receiving area for receiving a battery module being formed between the top plate structure and the bottom plate structure; and a panel structure, the panel structure being connected to the bottom plate structure and / or the top plate structure and being located on the side of the receiving area.

[0015] By applying the technical solution of the utility model, the bottom plate structure of the electric box body is provided with a bottom plate and a plurality of grid bars, the battery module is directly placed on the grid bars, and the bottom plate structure of the electric box body supports the battery module. While the bottom plate structure of the electric box body supports the battery module, the opening of the heat dissipation channel is located on the bottom surface of the battery module. The battery module can be cooled by conveying cold air to the heat dissipation channel. Specifically, the cold air circulates in the heat dissipation channel and directly exchanges heat with the bottom surface of the battery module to take away the heat generated by the battery module, thereby playing the effect of cooling the battery module. Compared with the traditional partition and heat-conducting structural adhesive solution, the solution of this embodiment can greatly improve the heat dissipation effect because the cold air directly dissipates heat with the battery module. At the same time, in order to further improve the heat conduction effect, this embodiment is also provided with a heat dissipation layer, which has a higher thermal conductivity than the grid bars, and can also enable the heat generated by the battery module to be taken away more efficiently by the cold air in the heat dissipation channel. In addition, the grid bars and the bottom plate can be arranged separately, so that the grid bars that are in direct contact with the bottom surface of the battery cell can be made of materials with better heat dissipation effects, and the bottom plate can be made of other materials with lower costs. This achieves cost control of the bottom plate structure of the electric box while maintaining a good heat dissipation effect of the bottom plate structure of the electric box. They can be processed separately and then assembled together, thereby reducing the difficulty of processing and helping to further reduce costs. Moreover, since the partitions are omitted, it is also beneficial to reduce the volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 The schematic diagram of the structure of the electric box body and the battery module of the utility model is shown;

[0018] Figure 2 An exploded view of the electric box and the battery module is shown;

[0019] Figure 3 A schematic structural diagram of the bottom plate structure is shown;

[0020] Figure 4 Shows Figure 3 The enlarged view of point A in the middle;

[0021] Figure 5 Shows Figure 3 The enlarged view of point B in the middle;

[0022] Figure 6 A schematic diagram of the structure of the bottom plate is shown;

[0023] Figure 7A front view of the electrical box body is shown;

[0024] Figure 8 A side view of the electrical box housing is shown;

[0025] Fig. 9 A schematic diagram of the structure of the base plate and the battery module is shown.

[0026] The above drawings include the following reference numerals:

[0027] 100, bottom plate structure; 110, bottom plate; 120, accommodation area; 121, battery cell accommodation area; 122, air duct installation area; 130, grid bars; 140, heat dissipation channel; 150, heat dissipation layer; 160, sealing reinforcement; 170, air outlet; 171, air outlet duct; 172, first section; 173, second section; 180, guide member; 200, top plate structure; 300, panel structure; 400, battery module. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0030] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0031] In order to solve the problem of poor heat dissipation effect of battery thermal management equipment in the prior art, the utility model provides a bottom plate structure for an electric box body and an electric box body.

[0032] like Figures 1 to 9 A bottom plate structure 100 for an electrical box body is shown, comprising: a bottom plate 110, a plurality of grid bars 130 and a heat dissipation layer 150, the bottom plate 110 having a receiving area 120 for mounting a battery module 400; the grid bars 130 are arranged at intervals in the receiving area 120, and heat dissipation channels 140 for gas circulation are formed between the grid bars 130, the battery module 400 is supported on the grid bars 130, and the gas in the heat dissipation channel 140 exchanges heat with the battery module 400 to dissipate heat; the heat dissipation layer 150 is located at the inner wall of the heat dissipation channel 140.

[0033] In the present embodiment, the bottom plate structure of the electrical box body is provided with a bottom plate 110 and a plurality of grid bars 130, and the battery module 400 is directly placed on the grid bars 130, and the bottom plate structure 100 of the electrical box body supports the battery module 400. While the bottom plate structure 100 of the electrical box body supports the battery module 400, the opening of the heat dissipation channel 140 is located at the bottom surface of the battery module 400, and the battery module 400 can be cooled by conveying cold air to the heat dissipation channel 140. Specifically, the cold air circulates in the heat dissipation channel 140 and directly exchanges heat with the bottom surface of the battery module 400 to take away the heat generated by the battery module 400, thereby cooling the battery module 400. Compared with the traditional partition and thermal conductive structural adhesive solution, the solution of the present embodiment can greatly improve the heat dissipation effect because the cold air directly dissipates heat from the battery module 400. At the same time, in order to further improve the heat conduction effect, the present embodiment is also provided with a heat dissipation layer 150, which has a higher thermal conductivity than the grid bars 130, and can also enable the heat generated by the battery module 400 to be more efficiently taken away by the cold air in the heat dissipation channel 140. In addition, the grid bars 130 and the bottom plate 110 can be arranged separately, so that the grid bars 130 directly in contact with the bottom surface of the battery cell can be made of materials with better heat dissipation effect, and the bottom plate 110 can be made of other materials with lower cost. In this way, while maintaining the good heat dissipation effect of the bottom plate structure 100 of the electric box body, the cost of the bottom plate structure 100 of the electric box body is controlled. During processing, they can be processed separately and then assembled together, thereby reducing the processing difficulty, which is conducive to further reducing costs, and because the partition is omitted, it is also conducive to reducing the volume.

[0034] like Figure 4 and Figure 5 As shown, in this embodiment, the upper opening of the heat dissipation channel 140 is provided, and the side wall and the bottom wall of the heat dissipation channel 140 are provided with a heat dissipation layer 150. The heat dissipation layer 150 in this embodiment is a heat dissipation paint layer, and preferably a heat dissipation paint with a high thermal conductivity is applied to form the heat dissipation layer 150. In this way, the heat dissipation layer 150 has a wider range of settings and uses and can be applied to different space environments. The heat dissipation paint is applied to the side walls and the bottom wall of the heat dissipation channel 140, wherein the side walls are the two sides of the grid bar 130, and the bottom wall is the partial area of ​​the upper surface of the bottom plate 110. In addition to applying the heat dissipation paint over a large area, the heat dissipation paint can also be applied only at some positions. For example, if it is considered from the perspective of saving paint, the paint can be applied at specific positions of the grid bar 130 and the bottom plate 110, that is, the two sides of the grid bar 130 mentioned above and the partial area of ​​the upper surface of the bottom plate 110. If it is considered from the perspective of convenient paint application, the heat dissipation paint can be applied on the upper surface of the entire bottom plate 110 and the entire grid bar 130.

[0035] like Figure 3 and Figure 6 As shown, the bottom plate 110 has a length direction and a width direction. Correspondingly, the receiving area 120 also has a length direction and a width direction. The receiving area 120 is arranged in the form of a recess. When the battery module 400 is placed in the receiving area 120 of the bottom plate 110, the length direction and the width direction of the battery module 400 are respectively parallel to the length direction and the width direction of the receiving area 120. It should be noted that the length direction of the battery module 400 refers to the direction in which multiple battery cells are arranged to form the battery module 400. Correspondingly, the direction perpendicular to the length direction of the battery module 400 in the horizontal plane is the width direction of the battery module 400. Figure 2 and Fig. 9 Taking the direction in as an example, the direction from lower left to upper right is the length direction, the direction from upper left to lower right is the width direction, and the up and down direction is the depth direction.

[0036] In this embodiment, the length direction of the grid bars 130 is parallel to the width direction of the battery module 400. The grid bars 130 spaced apart in the receiving area 120 are parallel to each other, and the grid bars 130 are spaced evenly apart. The length direction of the grid bars 130 spaced apart in parallel to each other is parallel to the width direction of the receiving area 120, and is parallel to the width direction of the battery module 400 placed in the receiving area 120.

[0037] In this embodiment, the base plate structure 100 also includes an air outlet member 170 having an air outlet duct 171. The air outlet member 170 is arranged above the base plate 110, and the air outlet duct 171 is connected to the heat dissipation channel 140. The airflow after heat exchange in the heat dissipation channel 140 is discharged through the air outlet duct 171. The bottom plate structure 100 can not only support the battery module 400, but also cool and dissipate the heat of the battery module 400 placed thereon to ensure the normal use of the battery module 400. When cooling and dissipating the heat of the battery module 400, the cold air used for heat dissipation first passes through the heat dissipation channel 140 and exchanges heat with the bottom surface of the battery module 400 during the process of passing through the heat dissipation channel 140, so as to take away the heat generated during the use of the battery module 400 and ensure the normal use of the battery module 400. The cold air passing through the heat dissipation channel 140 will increase in temperature due to the heat absorbed during the heat exchange process, and the cold air will turn into hot air. The hot air will naturally float up and enter the air outlet duct 171 through the heat dissipation channel 140, and be discharged through the air outlet duct 171, thereby also taking away the heat generated during the use of the battery module 400.

[0038] In this embodiment, the air outlet duct 171 includes a first section 172 and a second section 173 connected in sequence, and the first section 172 and the second section 173 are bent and connected, so that an angle greater than 0 degrees and less than 180 degrees is formed between the top surface of the first section 172 and the top surface of the second section 173, and the bottom surfaces of the first section 172 and the second section 173 have an air inlet, and the ends of the first section 172 and the second section 173 away from the connection have an air outlet, and from the connection between the first section 172 and the second section 173 to the direction of the air outlet, that is, along the flow direction of the airflow in the first section 172 and the second section 173 respectively, the top surface of the first section 172 and the top surface of the second section 173 are inclined upward. The outlet duct 171 is configured to have a first section 172 and a second section 173 connected in sequence, and the first section 172 and the second section 173 are configured to be tilted upward. This configuration is mainly based on the efficiency of using gas to perform heat exchange on the battery module 400. The segmented outlet duct 171 allows the gas to pass through a shorter flow path during the process of being discharged through the outlet duct 171, thereby increasing the flow efficiency of the gas in the bottom plate structure 100, and increasing the efficiency of heat exchange with the battery module 400. At the same time, since the temperature of the cold air will increase and become hot air after the heat exchange is completed, and the hot air has the characteristic of naturally floating, the first section 172 and the second section 173 of the outlet duct 171 are configured to be tilted upward so that the cold air that has completed the heat exchange can gradually float along the first section 172 and the second section 173 of the outlet duct 171 and finally reach the outlet of the first section 172 and the second section 173, and finally be discharged. The hot air is spontaneously blown out from the air inlet in the middle of the air outlet duct 171 along the inclined inner wall to the air outlets on both sides, and there is no need to add a fan to drive the hot air to be extracted. Because there is no fan design, there is no need to consider the maintenance of the fan, and in the case of a long module, an air outlet is also set at the rear. By discharging air from front to back, the long path of the hot air from the tail from back to front is avoided, which can effectively even the front and rear air volume of the entire module and reduce the temperature difference problem of the electrical box. This embodiment adopts a setting method in which the first section 172 and the second section 173 are symmetrically arranged relative to the connection. The two are only set in different directions, and the shape, size and other aspects are basically the same.

[0039] In this embodiment, the accommodation area 120 includes a cell accommodation area 121 for accommodating the battery module 400 and an air duct installation area 122 for docking the air outlet member 170. The grid bars 130 are arranged in the cell accommodation area 121 and the air duct installation area 122. There are one or more cell accommodation areas 121. When there are multiple cell accommodation areas 121, cell accommodation areas 121 are arranged on opposite sides of the air duct installation area 122 along the length direction of the heat dissipation channel 140. The cell accommodation area 121 and the air duct installation area 122 are arranged in sequence along the width direction of the accommodation area 120, and together constitute the entire accommodation area 120. The air duct installation area 122 is located in the middle of the accommodating area 120, and the battery cell accommodating areas 121 are symmetrically arranged on both sides thereof. Both ends of the accommodating area 120 in the width direction have the function of supplying air to the heat dissipation channel 140. The cold air used to cool down the battery module 400 can be supplied to the middle of the accommodating area 120 through both ends in the width direction of the accommodating area 120 at the same time. This arrangement reduces the path of the cold air flowing in the heat dissipation channel 140. Since the process of the cold air flowing in the heat dissipation channel 140 is the process of heat exchange with the battery module 400 to take away the heat of the battery module 400, reducing the path of the cold air flowing in the heat dissipation channel 140 can make the cold air still have a lower temperature and the ability to absorb heat when flowing through the rear part of the heat dissipation channel 140, thereby ensuring the efficiency of the relevant heat exchange. The present embodiment is provided with two battery cell accommodating areas 121, each of which can accommodate one or more battery modules 400 as needed, and the air duct installation area 122 is located at the center of the electrical box body, and the two battery cell accommodating areas 121 are respectively located on both sides of the air duct installation area 122. In this way, in conjunction with the aforementioned arrangement of the length direction of the grid bars 130 and the width direction of the battery module 400 in parallel, the number of battery cells passing through the heat dissipation channel 140 is halved, that is, the cold air entering the heat dissipation channel 140 from both sides converges in the middle air duct installation area 122 and enters the air outlet duct 171.

[0040] like Figure 4 and Figure 7As shown, in this embodiment, the bottom plate structure 100 also includes a guide member 180, which is arranged in the heat dissipation channel 140 and is located directly below the air outlet duct 171. The guide member 180 has a flat or curved guide surface, and the gas in the heat dissipation channel 140 changes its flow direction through the guide surface and enters the air outlet duct 171 upward. In this embodiment, the shape of the guide surface is preferably set to an arc surface, one end of the arc surface smoothly transitions with the upper surface of the bottom plate 110, and the other end is vertical. There is a smoothly transitioned arc between the two ends of the arc surface, and the arc is a short arc, and its range is a quarter of a circle. Since the bottom plate structure 100 adopts a setting mode of air supply at both ends, the guide member 180 has two symmetrically arranged guide surfaces, which are respectively aligned with the battery cell accommodating area 121 at both ends of the air duct installation area 122, and respectively aligned with the heat dissipation channel 140 in the battery cell accommodating area 121. Compared with the conventional arrangement of air intake on one side and air outlet on the other side, the above arrangement reduces the cold air path by half. This is because the cold air gradually heats up when taking away the heat from the front battery cells, resulting in a decrease in heat exchange capacity. The heat taken away from the rear battery cells is reduced, so the temperature of the battery cells on the air intake side is lower than that of the battery cells on the air outlet side. Therefore, reducing the path can effectively reduce the temperature difference of the battery cells.

[0041] When the cold air is transported to the bottom plate structure 100 for cooling and dissipating the battery module 400, the cold air first passes through the heat dissipation channel 140. Since the heat dissipation channel 140 is located directly below the battery module 400, the cold air will exchange heat with the battery module 400 through the bottom surface of the battery module 400 during the process of passing through the heat dissipation channel 140 to take away the heat of the battery module 400. The cold air passing through the heat dissipation channel 140 absorbs heat due to heat exchange and becomes hot air, and reaches the guide member 180. The hot air contacts the guide surface, and under the action of the guide surface, the direction of movement is deflected and finally moves vertically to the air outlet duct 171.

[0042] In the present embodiment, the bottom plate structure 100 further includes a sealing reinforcement 160, which is disposed above the heat dissipation channel 140 and blocks the opening above the heat dissipation channel 140 that is not connected to the battery module 400 or is not provided with the air outlet 170. When the sealing reinforcement 160 blocks this area, the cold air is still in a closed air duct when passing through this area, and there will be no gas leakage, which will not affect the cooling and heat dissipation effect on the battery module 400. Of course, if other positions also need to be sealed, the sealing reinforcement 160 can also be set at the required position, and the extension direction of the sealing reinforcement 160 can also be adjusted accordingly. In addition to the above-mentioned sealing effect, the sealing reinforcement 160 also has the function of improving the structural strength. The sealing reinforcement 160 can provide a certain support to the grid bars 130, which is conducive to improving the overall structural strength.

[0043] It should be noted that the size, position, etc. of the sealing reinforcement member 160 between the battery modules 400 can be adjusted accordingly according to actual conditions, as long as it can adapt to the installation and accommodation of the battery module 400.

[0044] Since the heat dissipation channel 140 of this embodiment is linear and the air volume loss is extremely small, the cold air can be effectively blown to the bottom, so multiple rows of battery modules 400 can be placed inside the electrical box body, greatly improving the volume grouping efficiency.

[0045] In this embodiment, the bottom plate 110 and the grid bars 130 are separately provided, and the materials of the bottom plate 110 and the grid bars 130 are the same or different. In the separate provision mode of the two, the grid bars 130, which are in contact with the bottom surface of the battery cell and play a major role in the heat exchange process, can be made of a material with a good heat dissipation effect to ensure the cooling and heat dissipation effect of the battery module 400, and as for the bottom plate 110, which is not very important in the heat exchange process, other materials with lower costs can be used to save costs, so that both economic benefits and product effects can be taken into account.

[0046] like Figure 1 and Figure 2 As shown, in the present embodiment, an electrical box body is further provided, comprising: the aforementioned electrical box body bottom plate structure 100, top plate structure 200 and panel structure 300, the top plate structure 200 is located above the electrical box body bottom plate structure 100, and a storage area for accommodating a battery module 400 is formed between the top plate structure 200 and the electrical box body bottom plate structure 100; the panel structure 300 is connected to the electrical box body bottom plate structure 100 and / or the top plate structure 200, and is located on the side of the storage area, the panel structure 300 may be located only in front of the electrical box body, and the other sides and the back may not be provided with a baffle structure, but may be openly arranged, thereby further improving the heat dissipation effect.

[0047] The heat dissipation process of the overall bottom plate structure of the electric box body of this embodiment is as follows:

[0048] External cold air enters the electric box from the left and right air outlets, passes through the bottom of the battery cell along the straight and sealed heat dissipation channel 140, and the heat of the battery cell is directly taken away by the cold air from the bottom, and the temperature is lowered. The cold air that takes away the heat becomes hot air, and under the guidance of the guide surface of the guide member 180 set in the middle of the heat dissipation channel 140, it floats up by itself into the air outlet duct 171 and is collected. Because the air duct formed by the grid bars 130 is straight and unobstructed, and the spacing is excellent in sealing, the cold air smoothly passes through the heat dissipation channel 140 coated with the heat dissipation layer 150 under the flow inertia to take away the heat, and there is no cold air leakage and the flow rate is not reduced due to obstruction. At the same time, the guide member 180 in the middle divides the entire heat dissipation channel 140 into two parts, the left and right parts. The cold air on the left and right sides passes through the bottom of the battery cell under its own flow inertia to take away the heat and turns into hot air when it reaches the middle air outlet duct 171. Under the action of the symmetrical arc surface of the guide member 180, the hot air changes its flow direction from horizontal to vertical, which not only prevents the problem of left and right wind collision, but also avoids the formation of right-angle structures through the arc surface to reduce the wind speed or backflow.

[0049] It should be noted that, the multiple in the above embodiments refers to at least two.

[0050] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0051] 1. Solved the problem of poor heat dissipation effect of battery thermal management equipment in the prior art;

[0052] 2. A heat dissipation layer is provided on the inner wall of the heat dissipation channel. The heat dissipation layer has a higher thermal conductivity, and the heat generated by the battery module can be taken away more efficiently by the cold air in the heat dissipation channel;

[0053] 3. The cold air directly dissipates heat from the battery module, thus greatly improving the heat dissipation effect;

[0054] 4. During processing, they can be processed separately and then assembled together, which can reduce the processing difficulty and help to further reduce costs. In addition, since the partition is omitted, it is also helpful to reduce the volume;

[0055] 5. If the sealing reinforcement blocks this area, the cold air will still be in the closed air duct when passing through, and there will be no gas leakage, which will not affect the cooling and heat dissipation effect of the battery module;

[0056] 6. By setting the two parts separately and choosing different materials, we can achieve both economic benefits and product effects.

[0057] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0058] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0059] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0060] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A bottom plate structure for an electrical box body, characterized in that: include: A bottom plate, the bottom plate having a receiving area for mounting a battery module; A plurality of grid bars, wherein the grid bars are arranged at intervals in the accommodation area, and heat dissipation channels for gas circulation are formed between the grid bars, the battery module is supported on the grid bars, and the gas in the heat dissipation channel exchanges heat with the battery module to dissipate heat; A heat dissipation layer is located on the inner wall of the heat dissipation channel.

2. The floor structure according to claim 1, characterized in that: The upper part of the heat dissipation channel is opened, and the side wall and the bottom wall of the heat dissipation channel are both provided with the heat dissipation layer.

3. The floor structure according to claim 1, characterized in that: The heat dissipation layer is a heat dissipation coating layer.

4. The floor structure according to any one of claims 1 to 3, characterized in that: The length direction of the grid bars is parallel to the width direction of the battery module; and / or The bottom plate and the grid bars are separately provided, and the bottom plate and the grid bars are made of the same or different materials.

5. The floor structure according to any one of claims 1 to 3, characterized in that: The bottom plate structure also includes an air outlet member, which has an air outlet duct. The air outlet member is arranged above the bottom plate, and the air outlet duct is connected to the heat dissipation channel. The airflow after heat exchange in the heat dissipation channel is discharged through the air outlet duct.

6. The floor structure according to claim 5, characterized in that: The air outlet duct includes a first section and a second section connected in sequence, and an angle less than 180 degrees is formed between the top surface of the first section and the top surface of the second section. The ends of the first section and the second section both have air outlets, and from the connection point to the direction of the air outlet, the top surface of the first section and the top surface of the second section are inclined upward.

7. The floor structure according to claim 5, characterized in that: The accommodating area includes a battery cell accommodating area for accommodating the battery module and an air duct installation area for docking with the air outlet member. The grid bars are arranged in the battery cell accommodating area and the air duct installation area. There are one or more battery cell accommodating areas. When there are multiple battery cell accommodating areas, the battery cell accommodating areas are arranged on opposite sides of the air duct installation area along the length direction of the heat dissipation channel.

8. The floor structure according to claim 5, characterized in that: The base plate structure also includes a guide member, which is arranged in the heat dissipation channel and is located directly below the air outlet duct. The guide member has a flat or curved guide surface. The gas in the heat dissipation channel changes its flow direction through the guide surface and enters the air outlet duct upward.

9. The floor structure according to claim 5, characterized in that: The bottom plate structure also includes a sealing reinforcement member, which is arranged above the heat dissipation channel and blocks the opening above the heat dissipation channel that is not connected to the battery module or is not provided with the air outlet member.

10. An electrical box body, characterized in that: include: The floor structure according to any one of claims 1 to 9; A top plate structure, the top plate structure is located above the bottom plate structure, and a receiving area for receiving a battery module is formed between the top plate structure and the bottom plate structure; A panel structure is connected to the bottom plate structure and / or the top plate structure and is located at a side of the accommodating area.

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