Bottom plate and housing for battery of heavy truck

Abstract

The utility model provides a bottom plate and a shell for a battery of a heavy truck, the bottom plate comprises a base plate, a plurality of strip-shaped flow channels capable of accommodating cooling liquid are formed in the base plate, the plurality of flow channels are distributed along the width or length direction of the base plate, and the upper surface of the base plate is used for being connected with a battery cell module through a heat-conducting glue layer; the two side end plates are connected to the two sides, in the length direction or the width direction, of the base plate and connected with the ends, in the length direction, of the flow channels, and a liquid inlet hole and a liquid outlet hole which are communicated with the flow channels are formed in the side, away from the base plate, of one side end plate. The bottom plate of the battery for the heavy truck is high in heat dissipation efficiency and enables a new energy battery to be compact in structure.

Description

Technical Field

[0001] The utility model relates to the field of new energy batteries, and more specifically, to a bottom plate and a shell of a battery for a heavy truck. Background Art

[0002] Heavy trucks are increasingly using new energy batteries, which include battery cell modules and the casing that houses the battery cell modules.

[0003] The heat dissipation of existing new energy batteries usually requires cooling the outer shell, and then cooling the battery module through the outer shell. The structure is relatively bloated and the heat dissipation efficiency is low. Utility Model Content

[0004] The utility model provides a new technical solution for the bottom plate and shell of the battery of a heavy truck, which can at least solve the problems of low heat dissipation efficiency and bloated structure of new energy batteries in the prior art.

[0005] According to a first aspect of the present utility model, a bottom plate for a battery of a heavy truck is provided. The bottom plate for a battery of a heavy truck comprises:

[0006] A substrate having a plurality of strip-shaped flow channels capable of accommodating coolant formed therein, the plurality of flow channels being distributed along the width or length of the substrate, and the upper surface of the substrate being used for connecting to the battery module via a thermally conductive adhesive layer;

[0007] Two side end plates are connected to both sides of the substrate in the length direction or the width direction and connected to the ends of the flow channel in the length direction, and a liquid inlet hole and a liquid outlet hole connected to the flow channel are formed on the side of one of the side end plates away from the substrate.

[0008] Furthermore, the first ends and second ends of the two adjacent flow channels are connected in sequence to form an "S"-shaped channel, and the liquid inlet and the liquid outlet are respectively connected to the two flow channels at both ends in the width direction of the substrate.

[0009] Furthermore, the plurality of flow channels are distributed along the width direction of the substrate, and the flow channels also include multiple groups. The flow channels in each group are internally interconnected, and the flow channels in different groups are not connected. The multiple groups of flow channels correspond one to one with the multiple groups of battery cell modules, and each group of flow channels is connected to the liquid inlet and outlet.

[0010] Furthermore, a first connecting channel connected to the liquid inlet hole is formed inside the side end plate, and the liquid inlet end of each group of the flow channels is connected to the first connecting channel. A second connecting channel connected to the liquid outlet hole is formed inside the side end plate, and the liquid outlet end of each group of the flow channels is connected to the second connecting channel.

[0011] Further, in each group of the flow channels, the first end and the second end of every two adjacent flow channels are sequentially communicated to form an "S"-shaped channel.

[0012] Further, the plurality of flow channels are distributed along the width direction of the substrate, and the width of the flow channel (123) is positively correlated with the heat generation of the battery module (50) in the corresponding area above the flow channel (123).

[0013] Further, the substrate is an aluminum profile extrusion, and the substrate and the side end plate are connected by friction stir welding.

[0014] Further, the bottom plate further comprises:

[0015] A liquid inlet connector connected to the liquid inlet hole;

[0016] A liquid outlet connector connected to the liquid outlet hole.

[0017] According to a second aspect of the present application, a housing is provided, which comprises:

[0018] A bottom plate, which is the above-mentioned bottom plate, and the bottom plate can be connected to the battery module through a heat-conducting adhesive layer;

[0019] A box cover formed as a groove body with a first opening at the bottom end, the box cover can accommodate the battery module, and the edge of the box cover at the first opening is provided with an outer flange, and the bottom of the outer flange is embedded in a bushing;

[0020] A first fastener which is fastened and connected through the outer flange, the bushing and the box cover.

[0021] Further, the housing further comprises:

[0022] A first sealing ring arranged between the bottom plate and the box cover, and the first fastener is fastened and connected with the bottom plate through the outer flange and the first sealing ring.

[0023] According to the bottom plate of the battery for heavy trucks of the present invention, the first surface of the substrate forms a plurality of strip-shaped flow channels distributed along the width direction or length direction of the substrate, the first surface of the side end plate closes the first surface of the substrate, and a flow channel for supplying the flow of the coolant is formed at the strip-shaped flow channel, and the side of the substrate forms a liquid inlet hole and a liquid outlet hole connecting the flow channels. The coolant flows from the liquid inlet hole into the plurality of flow channels, then enters the liquid outlet hole from the plurality of flow channels, and finally flows out from the liquid outlet hole. The heat dissipation efficiency of the coolant is high, and the battery cell module can be efficiently dissipated. A thermal conductive adhesive layer is coated on the second surface of the substrate or the second surface of the side end plate. When in use, the battery cell module is set on the thermal conductive adhesive layer, that is, the bottom plate is connected to the battery cell module through the thermal conductive adhesive layer to dissipate heat for the battery cell module. Compared with the direct connection of the battery cell module to the second surface of the substrate or the second surface of the side end plate, the thermal conductive adhesive layer can avoid contact gaps, reduce thermal resistance, improve thermal conductivity, and provide a certain buffer for the battery cell module, reducing damage to the battery cell module.

[0024] Furthermore, the base plate (including the housing) is used directly to dissipate heat from the cell module. The base plate and liquid cooling system are integrated into a compact design, which is conducive to improving space utilization, reducing the number of parts, simplifying the assembly process, reducing costs, and achieving high heat dissipation efficiency. This can also increase the energy density of the cell module. This avoids the existing situation where a cooling system is provided on the surface of the housing, where the cooling system first cools the housing and then cools the cell module through the housing, resulting in low heat dissipation efficiency.

[0025] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0027] Figure 1 This is a structural diagram of a bottom plate of a battery for a heavy truck according to an embodiment of the present utility model;

[0028] Figure 2 is a cross-sectional view of a base plate according to a first embodiment of the present utility model;

[0029] Figure 3 is a cross-sectional view of a bottom plate according to a second embodiment of the present utility model;

[0030] Figure 4 is a cross-sectional view of a base plate according to a third embodiment of the present utility model;

[0031] Figure 5 is a structural diagram of a new energy battery according to an embodiment of the present utility model;

[0032] Figure 6 yes Figure 5 An exploded diagram of a new energy battery according to an embodiment.

[0033] Reference numerals:

[0034] 10. Bottom plate; 11. Side end plate; 111. Liquid inlet hole; 112. Liquid outlet hole; 113. First connecting channel; 114. Second connecting channel; 12. Base plate; 123. Flow channel; 13. Liquid inlet connector; 14. Liquid outlet connector; 20. Box cover; 22. External flange; 50. Battery cell module; 81. First sealing ring. DETAILED DESCRIPTION

[0035] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0036] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0037] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0038] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0039] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0040] The bottom plate 10 of a battery for a heavy truck according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] like Figures 1 to 4 As shown, a floor plate 10 for a battery of a heavy truck according to an embodiment of the present invention includes a base plate 12 and side end plates 11 .

[0042] First, the substrate 12 has a plurality of strip-shaped flow channels 123 formed inside the substrate 12 for accommodating coolant. The plurality of flow channels 123 are distributed along the width or length direction of the substrate 12. The upper surface of the substrate 12 is used to connect the battery module 50 through a thermally conductive adhesive layer.

[0043] like Figures 1 to 4As shown, the first surface of the substrate 12 has multiple strip-shaped flow channels 123 distributed along the width of the substrate 12. The liquid inlet hole 111 and the liquid outlet hole 112 on the side end plate 11 respectively connect the two flow channels 123 at the two ends in the width direction. The coolant flows from the liquid inlet hole 111 into the multiple flow channels 123, then enters the liquid outlet hole 112 from the multiple flow channels 123, and finally flows out of the liquid outlet hole 112.

[0044] Next, the side end plates 11 are described. The two side end plates 11 are connected to the longitudinal or width sides of the base plate 12 and connect the longitudinal ends of the flow channel. A liquid inlet 111 and a liquid outlet 112 communicating with the flow channel 123 are formed on the side of one of the side end plates 11 away from the base plate 12.

[0045] like Figure 1 As shown, the side end plates 11 connect the two sides of the base plate 12 in the longitudinal direction. The liquid inlet 111 and the liquid outlet 112 of one of the side end plates 11 are connected to the flow channel 123. The side end plates 11 can prevent the coolant flowing through the base plate 12 from leaking.

[0046] A thermally conductive adhesive layer can be applied to the upper surface of the substrate 12. During use, the battery module 50 is placed on the thermally conductive adhesive layer, that is, the base plate 10 is connected to the battery module 50 via the thermally conductive adhesive layer, thereby dissipating heat from the battery module 50. Compared to directly connecting the battery module 50 to the upper surface of the substrate 12, the thermally conductive adhesive layer can avoid contact gaps, reduce thermal resistance, and improve thermal conductivity efficiency. It can also provide a certain buffer for the battery module 50, reducing damage caused by the battery module 50 being jolted while following a heavy truck during driving.

[0047] The above-mentioned bottom plate 10 of the battery for heavy trucks has a plurality of strip-shaped flow channels 123 formed inside the substrate 12, and two side end plates 11 connect the two ends of the substrate 12 in the length or width direction, and one of the side end plates 11 is formed with a liquid inlet and a liquid outlet connecting the flow channels. The coolant flows into the multiple flow channels 123 from the liquid inlet 111, then enters the liquid outlet 112 from the multiple flow channels 123, and finally flows out from the liquid outlet 112. The heat dissipation efficiency of the coolant is high, and it can efficiently dissipate heat for the battery cell module 50. A thermal conductive adhesive layer is coated on the upper surface of the substrate 12. When in use, the battery cell module 50 is placed on the thermal conductive adhesive layer, that is, the bottom plate 10 is connected to the battery cell module 50 through the thermal conductive adhesive layer to dissipate heat for the battery cell module 50. Compared with directly connecting the upper surface of the substrate 12 to the battery module 50 , the thermal conductive adhesive layer can avoid contact gaps, reduce thermal resistance, improve thermal conductivity efficiency, and provide a certain buffer for the battery module 50 to reduce damage to the battery module 50 .

[0048] Furthermore, the base plate 10 (the housing includes the base plate 10) is directly used to dissipate heat from the cell module 50. The base plate 10 is integrated with the liquid cooling system, resulting in a compact structure, which is beneficial for improving space utilization, reducing the number of parts, simplifying the assembly process, reducing costs, and achieving high heat dissipation efficiency, thereby increasing the energy density of the cell module 50. This avoids the existing situation where a cooling system is provided on the surface of the housing, where the cooling system first cools the housing and then cools the cell module 50 through the housing, resulting in low heat dissipation efficiency.

[0049] The specific distribution of the flow channels 123 on the substrate 12 may be as follows:

[0050] Structure 1

[0051] The first and second ends of two adjacent flow channels 123 are connected in sequence to form an "S"-shaped channel. The liquid inlet 111 and the liquid outlet 112 are respectively connected to the two flow channels 123 at both ends in the width direction of the substrate 12.

[0052] like Figure 2 As shown (arrows indicate the direction of coolant flow), the first surface of substrate 12 is formed with ten flow channels 123 distributed along the width of substrate 12. These ten flow channels 123 are connected end-to-end to form an S-shaped channel. Coolant flows from inlet 111 through each flow channel 123 in an S-shaped direction, and finally flows out of outlet 112. This substrate 12 has a simple structure, smooth coolant flow, and good heat dissipation.

[0053] Structure 2

[0054] The battery cell module 50 includes multiple groups spaced apart along the width direction of the substrate 12, and multiple flow channels 123 are distributed along the width direction of the substrate 12. The flow channels 123 also include multiple groups. The flow channels 123 in each group are interconnected, and the flow channels 123 in different groups are not connected. The multiple groups of flow channels 123 correspond one-to-one to the multiple groups of battery cell modules 50, and each group of flow channels 123 is connected to the liquid inlet hole 111 and the liquid outlet hole 112.

[0055] like Figure 6 As shown, the battery cell module 50 includes three groups distributed along the width direction of the substrate 12. Figure 3 As shown (the arrow indicates the direction of coolant flow), the flow channels 123 are correspondingly divided into three groups. The first group of flow channels 123 includes four interconnected flow channels 123, the second group of flow channels 123 includes three interconnected flow channels 123, and the third group of flow channels 123 includes three interconnected flow channels 123. The liquid inlet 111 is connected to the three groups of flow channels 123, and the liquid outlet 112 is also connected to the three groups of flow channels 123.

[0056] The coolant flows into the three groups of flow channels 123 synchronously, and the three groups of battery modules corresponding to the three groups of flow channels 123 are independently cooled. If one group of flow channels 123 has an abnormality (blockage, leakage, etc.), it will not affect the flow channels 123 of other groups, which can increase stability. Moreover, the substrate 12 of this structure can evenly dissipate heat for each group of battery modules 50, avoiding the coolant from Figure 1 In the illustrated embodiment, when the coolant flows through each flow channel 123 one by one, the temperature of the coolant gradually increases, and the heat dissipation to each group of battery modules 50 downstream of the coolant gradually decreases.

[0057] It should be noted that the above are optional examples, and there is no limitation on the number of battery cell modules 50 and the number of flow channels 123 in each group of flow channels 123 .

[0058] Furthermore, a first connecting channel 113 connected to the liquid inlet hole 111 is formed inside the side end plate 11, and the liquid inlet end of each group of flow channels 123 is connected to the first connecting channel 113. A second connecting channel 114 connected to the liquid outlet hole 112 is formed inside the side end plate 11, and the liquid outlet end of each group of flow channels 123 is connected to the second connecting channel 114.

[0059] like Figure 3 As shown, the first connecting channel 113 connects the various groups of flow channels 123, allowing the coolant flowing into the liquid inlet 111 to flow smoothly into the various groups of flow channels 123. The second connecting channel 114 connects the various groups of flow channels 123, allowing the coolant in each group of flow channels 123 to flow smoothly into the liquid outlet 112. This structure of the substrate 12 is simple to manufacture and has high production efficiency.

[0060] Furthermore, in each group of flow channels 123 , the first ends and the second ends of two adjacent flow channels 123 are sequentially connected to form an “S”-shaped channel.

[0061] like Figure 3 As shown, the flow channels 123 in each group of flow channels 123 are connected end to end to form an "S"-shaped channel, and the coolant flows through each flow channel 123 in each group of flow channels 123 one by one, so that the coolant flows smoothly.

[0062] Structure Three

[0063] The plurality of flow channels 123 are distributed along the width direction of the substrate 12 , and the width of the flow channels 123 is positively correlated with the heat generated by the battery cell module 50 in the corresponding area above the flow channels 123 .

[0064] like Figure 4As shown, the change in the width of the flow channel 123 corresponds to a change in the cross-sectional area of ​​the coolant flow (the larger the width, the larger the cross-sectional area), that is, a change in the flow rate of the coolant (the larger the cross-sectional area, the lower the flow rate). The width of the flow channel 123 is set according to the heat generation of the battery cell module 50 set in the corresponding area. That is, the area with high heat generation of the battery cell module 50, the larger the width of the corresponding flow channel 123, the better the heat dissipation is concentrated in the area with high heat generation of the battery cell module 50, which can ensure that the battery cell modules 50 at the front and rear ends can be effectively cooled, thereby improving the uniformity of heat dissipation.

[0065] In some embodiments of the present invention, the base plate 12 is an aluminum extrusion part, and the base plate 12 and the side end plate 11 are connected by stir friction welding.

[0066] Aluminum profiles have high thermal conductivity, enabling the substrate 12 to efficiently dissipate heat from the battery module. The substrate 12 is an extruded part, that is, formed through an extrusion process, which has high production efficiency, meets the needs of large-scale operations, and can reduce costs.

[0067] The base plate 12 is connected to the side end plate 11 by stir friction welding, which can improve the connection efficiency and have better stability compared to ordinary electric welding, so that the bottom plate 10 has higher sealing performance and avoids coolant leakage.

[0068] In some embodiments of the present invention, the bottom plate 10 further includes a liquid inlet connector 13 and a liquid outlet connector 14. The liquid inlet connector 13 is connected to the liquid inlet hole 111. The liquid outlet connector 14 is connected to the liquid outlet hole 112.

[0069] The liquid inlet connector 13 can be easily connected to the liquid inlet pipe, so that the coolant in the liquid inlet pipe can flow smoothly into the liquid inlet hole 111 without leakage. The liquid outlet connector 14 can be easily connected to the liquid outlet pipe, so that the coolant flowing out of the liquid outlet can flow smoothly into the liquid outlet pipe without leakage.

[0070] Next, the housing of the embodiment of the present invention is described.

[0071] like Figure 5 and Figure 6 As shown, the housing of the present embodiment includes a base plate 10, a cover 20, and a first fastener. The base plate 10 is similar to the base plate 10 of the aforementioned embodiment. The cover 20 is formed as a trough with a first opening at its bottom end. The cover 20 is capable of accommodating the battery cell module 50. An outer flange 22 is provided at the edge of the first opening, and a bushing is embedded in the bottom of the outer flange 22. The first fastener passes through the outer flange 22 and the bushing to securely connect to the cover 20.

[0072] The battery cell module 50 can be well protected by the bottom plate 10 and the box cover 20. The bottom plate 10 and the box cover 20 are detachably connected by a first fastener, and can be easily disassembled.

[0073] Since the bottom plate 10 according to the embodiment of the present invention has the above-mentioned technical effects, the housing according to the embodiment of the present invention also has corresponding technical effects.

[0074] Furthermore, the housing further comprises a first sealing ring 81 . The first sealing ring 81 is disposed between the bottom plate 10 and the box cover 20 . The first fastener passes through the outer flange 22 , the bushing and the first sealing ring 81 and is fastened to the bottom plate 10 .

[0075] like Figure 6 As shown, the first sealing ring 81 can increase the airtightness between the box and the bottom plate 10 and improve the waterproof level, thereby preventing the heavy truck from easily leaking water under complex and harsh driving conditions.

[0076] Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art will appreciate that the above examples are for illustration only and are not intended to limit the scope of the present invention. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A floor plate (10) for a battery of a heavy truck, characterized in that: The bottom plate (10) comprises: A substrate (12), wherein a plurality of strip-shaped flow channels (123) capable of accommodating a cooling liquid are formed inside the substrate (12), the plurality of flow channels (123) being distributed along the width or length direction of the substrate (12), and the upper surface of the substrate (12) being used for connecting the electric core module (50) via a thermally conductive adhesive layer; Two side end plates (11), the two side end plates (11) are respectively connected to both sides of the substrate (12) in the length direction or the width direction and connected to the ends of the flow channel in the length direction, and a liquid inlet hole (111) and a liquid outlet hole (112) communicating with the flow channel (123) are formed on a side of one of the side end plates (11) away from the substrate (12).

2. The floor plate (10) for a battery for a heavy truck according to claim 1, characterized in that The first end and the second end of each of the adjacent flow channels (123) are connected in sequence to form an "S"-shaped channel, and the liquid inlet hole (111) and the liquid outlet hole (112) are respectively connected to the two flow channels (123) at both ends in the width direction of the substrate (12).

3. The bottom plate (10) of the battery for heavy trucks according to claim 1, wherein the battery cell modules (50) include a plurality of groups spaced apart and arranged along the width direction of the base plate (12), characterized in that: The plurality of flow channels (123) are distributed along the width direction of the substrate (12), and the flow channels (123) also include a plurality of groups. The flow channels (123) in each group are interconnected, and the flow channels (123) in different groups are not connected. The plurality of groups of flow channels (123) correspond to the plurality of groups of battery core modules (50) in a one-to-one manner, and each group of flow channels (123) is connected to the liquid inlet hole (111) and the liquid outlet hole (112).

4. The floor plate (10) for a battery for a heavy truck according to claim 3, characterized in that A first connecting channel (113) connected to the liquid inlet hole (111) is formed inside the side end plate (11), and the liquid inlet end of each group of the flow channels (123) is connected to the first connecting channel (113). A second connecting channel (114) connected to the liquid outlet hole (112) is formed inside the side end plate (11), and the liquid outlet end of each group of the flow channels (123) is connected to the second connecting channel (114).

5. The bottom plate (10) for a battery for a heavy truck according to claim 4, characterized in that In each group of the flow channels (123), the first ends and the second ends of two adjacent flow channels (123) are connected in sequence to form an "S"-shaped channel.

6. The floor plate (10) for a battery for a heavy truck according to claim 1, characterized in that The plurality of flow channels (123) are distributed along the width direction of the substrate (12), and the width of the flow channels (123) is positively correlated with the heat generation of the battery core module (50) in the corresponding area above the flow channels (123).

7. The floor plate (10) for a battery for a heavy truck according to claim 1, characterized in that The base plate (12) is an aluminum extrusion part, and the base plate (12) and the side end plate (11) are connected by stir friction welding.

8. The bottom plate (10) for a battery for a heavy truck according to claim 1, characterized in that The bottom plate (10) further comprises: a liquid inlet connector (13), the liquid inlet connector (13) being connected to the liquid inlet hole (111); A liquid outlet connector (14), the liquid outlet connector (14) is connected to the liquid outlet hole (112).

9. A housing, characterized in that: The housing comprises: A base plate (10), wherein the base plate (10) is the base plate (10) according to any one of claims 1 to 8, and the base plate (10) can be connected to the battery module (50) through a thermally conductive adhesive layer; A box cover (20), the box cover (20) is formed as a trough body with a first opening at the bottom end, the box cover (20) is capable of accommodating the battery core module (50), and the box cover (20) is provided with an outer flange (22) at the edge of the first opening, and the bottom of the outer flange (22) is embedded in the bushing; A first fastener passes through the outer flange (22), the bushing and is fastened to the box cover (20).

10. The housing according to claim 9, wherein The housing further comprises: A first sealing ring (81) is provided between the base plate (10) and the box cover (20); the first fastener passes through the outer flange (22), the bushing and the first sealing ring (81) and is fastened to the base plate (10).

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