High-voltage copper bar cooling structure for power battery and vehicle

Abstract

The utility model provides a high-voltage copper bar cooling structure for a power battery and a vehicle. The high-voltage copper bar cooling structure for the power battery comprises an electric device, the water cooling plate is arranged at the lower part of the electric device; and the copper bar is connected to the electric device, and at least partial area of the copper bar is connected with the water cooling plate. According to the high-voltage copper bar cooling structure for the power battery and the vehicle, the problems that an existing high-voltage copper bar cooling mode is greatly influenced by the environment temperature and the cooling speed is low can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of battery heat dissipation, and in particular to a high-voltage copper busbar cooling structure and a vehicle for a power battery. Background Art

[0002] With the rapid development of the new energy industry, the acceleration of new energy vehicles is getting faster and faster, and the output current that the high-voltage copper busbar of the power battery needs to carry is gradually increasing. At present, the application of current sensors in the field of power batteries is becoming more and more extensive. However, there are certain range requirements for the heating temperature of the high-voltage copper busbar connected to the current sensor.

[0003] If the temperature of the high-voltage copper busbar of the power battery is too high, it may cause battery safety problems and may also affect the accuracy of the measurement system connected to the high-voltage copper busbar. At present, the cooling method of the high-voltage copper busbar is mostly natural cooling, but this cooling method has problems such as being greatly affected by the ambient temperature and slow cooling speed. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a high-voltage copper busbar cooling structure and vehicle for a power battery, so as to solve the problem that the existing high-voltage copper busbar cooling method is greatly affected by the ambient temperature and has a slow cooling speed.

[0005] According to a first aspect of the utility model, a high-voltage copper busbar cooling structure for a power battery is provided, wherein the high-voltage copper busbar cooling structure for a power battery comprises: an electrical component; a water-cooling plate, arranged at the lower part of the electrical component; and a copper busbar, connected to the electrical component, wherein at least a partial area of ​​the copper busbar is connected to the water-cooling plate.

[0006] Preferably, at least a region of the copper busbar connected to the water-cooling plate is provided with a first insulating coating.

[0007] Preferably, the first insulating coating is provided on the areas of the copper busbar other than the connection with the electrical device.

[0008] Preferably, a second insulating coating is provided on the surface of the water-cooling plate.

[0009] Preferably, the electrical component comprises a protrusion protruding upward, and an end of the copper busbar is connected to the protrusion.

[0010] Preferably, the protrusion includes a first protrusion and a second protrusion, the first end of the copper bar is connected to the top of the first protrusion, and the second end of the copper bar is connected to the top of the second protrusion.

[0011] Preferably, a bent portion bent downward is formed in the middle of the copper busbar, and a bottom surface of the bent portion is connected to the water cooling plate.

[0012] Preferably, a heat-conducting structural adhesive is provided between the electrical device and the water-cooling plate.

[0013] Preferably, the copper busbar is bonded to the water cooling plate by means of the heat conductive structural adhesive.

[0014] According to a second aspect of the utility model, a vehicle is provided, wherein the vehicle comprises the high-voltage copper busbar cooling structure for the power battery as described above.

[0015] The high-voltage copper bar cooling structure and vehicle for the power battery of the embodiment of the utility model have a water cooling plate arranged at the lower part of the electrical component, the copper bar is connected to the electrical component, and at least a part of the copper bar is connected to the water cooling plate, so that the copper bar can be directly cooled by the water cooling plate to avoid the temperature of the copper bar being too high. This can effectively solve the problem that the existing high-voltage copper bar cooling method is greatly affected by the ambient temperature and has a slow cooling speed.

[0016] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of a high-voltage copper busbar cooling structure for a power battery according to the utility model.

[0019] Figure 2 It is a schematic diagram from another angle of the high-voltage copper busbar cooling structure for the power battery according to the utility model.

[0020] Figure numerals: 1-electrical component; 10-protrusion; 11-first protrusion; 12-second protrusion; 2-water cooling plate; 3-copper busbar; 30-bending portion; 31-connecting area; 4-thermal conductive structural adhesive. DETAILED DESCRIPTION

[0021] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0022] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0023] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0024] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0025] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0026] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0027] The terms used herein are only used to describe various examples and are not used to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprising" and "having" list the existence of the stated features, quantities, operations, components, elements and / or their combinations, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0028] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0029] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0030] like Figure 1 and Figure 2 As shown, according to the first aspect of the utility model, a high-voltage copper busbar cooling structure for a power battery is provided. The high-voltage copper busbar cooling structure for a power battery comprises an electrical component 1, a water cooling plate 2 and a copper busbar 3.

[0031] In the following description, reference will be made to Figure 1 and Figure 2 The specific structure of the above components of the high-voltage copper busbar cooling structure for power batteries and the connection relationship of the above components are specifically described.

[0032] like Figure 1 and Figure 2As shown, in an embodiment, the electrical device 1 may be a component for a power battery. Specifically, in an embodiment, the electrical device 1 may be a related component in a BDU (battery energy distribution unit) of a power battery. A water-cooled plate 2 may be provided at the lower portion of the electrical device 1 for cooling the electrical device 1. The copper bus 3 may be connected to the electrical device 1. Preferably, at least a portion of the copper bus 3 may be connected to the water-cooled plate 2, so that the heat of the copper bus 3 may be transferred to the water-cooled plate 2 (even if the copper bus 3 dissipates heat through the water-cooled plate 2), to avoid excessively high temperatures of the copper bus 3, which may cause safety problems in the power battery, or affect the accuracy of the measurement system connected to the copper bus 3.

[0033] Preferably, Figure 1 and Figure 2 As shown, in the embodiment, the shape of the copper bar 3 can be a bar, and the copper bar 3 can be a high-voltage copper bar. The electrical device 1 can be arranged at the lower part of the copper bar 3. Preferably, the electrical device 1 can include an upward protrusion (which can be as shown in FIG. Figure 2 The protrusion 10 (in the upper direction shown in the figure), the end of the copper bar 3 can be connected to the protrusion 10. Preferably, the protrusion 10 can be a columnar connection base, and the connection base can be made of an insulating material. Preferably, a second copper bar connected to a current sensor (which can be a shunt current sensor) can also be provided between the protrusion 10 and the end of the copper bar 3, and the end of the copper bar 3, the end of the second copper bar and the top of the protrusion 10 can be connected by bolts. Specifically, in an embodiment, the current sensor can be welded to the second copper bar through a manganese-copper alloy. Since the current sensor needs to pass current, the current sensor can take away part of the heat of the copper bar 3 after being connected to the copper bar 3 through the second copper bar, so as to achieve the purpose of cooling. In addition, preferably, the current sensor can also be integrated with the second copper bar.

[0034] The current sensor can be arranged between the end of the copper busbar 3 and the protrusion 10. The end of the copper busbar 3 can be connected to the current sensor by bolts.

[0035] Without limitation thereto, the connection between the copper bar 3 and the current sensor of the power battery is only one case in the embodiment. In actual use, the copper bar may also be connected to other components in the power battery so that the copper bar can be connected to the water cooling plate.

[0036] Further, preferably, Figure 1 and Figure 2As shown, in an embodiment, the protrusion 10 may include a first protrusion 11 and a second protrusion 12. Preferably, the shape of the first protrusion 11 may be approximately a rectangular parallelepiped. The shape of the second protrusion 12 may also be approximately a rectangular parallelepiped. The first protrusion 11 may be arranged in parallel with the second protrusion 12, and the height of the first protrusion 11 may be equal to the height of the second protrusion 12 (that is, the top surface of the first protrusion 11 may be flush with the top surface of the second protrusion 12). The first protrusion 11 may be located on the side of the second protrusion 12 (may be as shown in FIG. 1 ). Figure 2 As shown in FIG. 1 , the first protrusion 11 is arranged on the left side of the second protrusion 12). The first end of the copper busbar 3 (which may be as shown in FIG. Figure 2 The left end of the copper bar 3 (as shown in FIG. 1 ) can be connected to the top end of the first protrusion 11 by bolts. Figure 2 The right end shown in the figure can be connected with the top end of the second protrusion 12 by bolts.

[0037] Specifically, Figure 1 and Figure 2 As shown, in an embodiment, the first end of the copper bar 3 may be formed with a through hole, and the top surface of the first protrusion 11 may be provided with a threaded hole. The through hole at the first end of the copper bar 3 may be aligned with the threaded hole on the top surface of the first protrusion 11 and connected by a bolt. Similarly, the second end of the copper bar 3 may be formed with a through hole, and the top surface of the second protrusion 12 may be provided with a threaded hole. The through hole at the second end of the copper bar 3 may be aligned with the threaded hole on the top surface of the second protrusion 12 and connected by a bolt. The first end of the copper bar 3 may be conductively connected to the first protrusion 11, and the second end of the copper bar 3 may be conductively connected to the second protrusion 12.

[0038] However, it is not limited to this. The first end of the copper bar 3 is connected to the top surface of the first protrusion 11 and the second end of the copper bar 3 is connected to the top surface of the second protrusion 12 is only a preferred situation in the embodiment. As long as the electrical and thermal conductivity functions of the copper bar 3 can be achieved, the copper bar 3 can also be connected in other ways. For example: the first end of the copper bar is connected to the right side of the first protrusion (which can be as follows Figure 2 The second end of the copper bar is connected to the left side of the second protrusion (which can be as shown in Figure 2 left side) connection shown in .

[0039] More preferably, Figure 1 and Figure 2As shown, in the embodiment, the middle of the copper bar 3 may be formed with a bent portion 30 bent downward, and the bottom surface of the bent portion 30 may be connected to the water-cooled plate 2. Specifically, the first end of the copper bar 3 is connected to the top surface of the first protrusion 11, and the second end of the copper bar 3 is connected to the top surface of the second protrusion 12. The bent portion 30 may include a first vertical portion and a second vertical portion (which may be as shown in FIG. Figure 2 The vertical direction shown in FIG) and the horizontal connection part (which can be as shown in FIG. Figure 2 ). The top of the first vertical portion can be connected to the first end of the copper bar 3, the top of the second vertical portion can be connected to the second end of the copper bar 3, and the first vertical portion and the second vertical portion are arranged in parallel. The horizontal connecting portion is formed between the first vertical portion and the second vertical portion, and the two ends of the horizontal connecting portion are respectively connected to the bottom end of the first vertical portion and the bottom end of the second vertical portion, thereby forming the bottom of the bending portion 30. The bottom surface of the horizontal connecting portion can be connected to the water-cooled plate 2, thereby transferring the heat of the copper bar 3 to the water-cooled plate 2 to cool the copper bar 3.

[0040] In addition, preferably, Figure 1 and Figure 2 As shown, in the embodiment, the copper busbar 3 is provided with a first insulating coating at least in the area connected to the water-cooling plate 2. That is, at least the bottom surface of the bending portion 30 of the copper busbar 3 (i.e., the bottom surface of the horizontal connecting portion) is provided with a first insulating coating. The specific material of the first insulating coating can be selected according to actual needs. For example, when the copper busbar 3 needs to exert ductility, the first insulating coating can be a sprayed insulating powder coating.

[0041] Further, preferably, in the embodiment, the first insulating coating may be provided on the area other than the connection between the copper bar 3 and the electrical device 1. The connection between the copper bar 3 and the electrical device 1 may be the first end of the copper bar 3 and the second end of the copper bar 3, that is, Figure 1 The connection area 31 is shown in FIG. The connection area 31 is used to electrically connect the copper bus 3 to the electrical device 1. The first insulating coating is used to insulate the contact between the copper bus 3 and the water-cooling plate 2. In addition, preferably, the surface of the water-cooling plate 2 may be provided with a second insulating coating to avoid potential insulation risks caused by failure of either the first insulating coating or the second insulating coating.

[0042] Preferably, Figure 1 and Figure 2As shown, in the embodiment, a thermally conductive structural adhesive 4 may be provided between the electrical device 1 and the water-cooling plate 2. The laying area of ​​the thermally conductive structural adhesive 4 may be larger than the bottom area of ​​the electrical device 1. More preferably, the copper bar 3 may be bonded to the water-cooling plate 2 by the thermally conductive structural adhesive 4, thereby fixing the relative position of the copper bar 3 and the water-cooling plate 2. Preferably, the thermally conductive structural adhesive 4 may be selected from thermally conductive structural adhesives with different thermal conductivities and different bonding strengths according to actual needs.

[0043] In addition, according to a second aspect of the present utility model, a vehicle is provided, the vehicle comprising the high-voltage copper busbar cooling structure for the power battery as described above.

[0044] During use, the water-cooling plate 2 is arranged at the lower part of the electrical device 1, and the copper bar 3 is connected to the electrical device 1. The lower part of the copper bar 3 is connected to the water-cooling plate 2 through the heat-conducting structural adhesive 4, so that the copper bar 3 can be cooled by the water-cooling plate 2 to avoid the temperature of the copper bar 3 being too high. Such a setting can improve the heat dissipation effect of the copper bar 3 inside the power battery, so that the power battery can take into account both economy and safety while improving the discharge performance.

[0045] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A high-voltage copper busbar cooling structure for a power battery, characterized in that: The high-voltage copper busbar cooling structure for the power battery comprises: Electrical components; A water cooling plate, disposed below the electrical device; and A copper busbar is connected to the electrical device, and at least a portion of the copper busbar is connected to the water cooling plate.

2. The high-voltage copper busbar cooling structure for a power battery according to claim 1, characterized in that: At least the area where the copper busbar is connected to the water-cooling plate is provided with a first insulating coating.

3. The high-voltage copper busbar cooling structure for a power battery according to claim 2, characterized in that: The first insulating coating is provided on the areas of the copper busbar other than the connection with the electrical device.

4. The high-voltage copper busbar cooling structure for a power battery according to claim 1, characterized in that: The surface of the water-cooling plate is provided with a second insulating coating.

5. The high-voltage copper busbar cooling structure for a power battery according to claim 1, characterized in that: The electrical device includes a protrusion protruding upward, and an end of the copper busbar is connected to the protrusion.

6. The high-voltage copper busbar cooling structure for a power battery according to claim 5, characterized in that: The protrusion includes a first protrusion and a second protrusion, the first end of the copper bar is connected to the top of the first protrusion, and the second end of the copper bar is connected to the top of the second protrusion.

7. The high-voltage copper busbar cooling structure for a power battery according to claim 6, characterized in that: A bent portion bent downward is formed in the middle of the copper busbar, and a bottom surface of the bent portion is connected to the water cooling plate.

8. The high-voltage copper busbar cooling structure for a power battery according to claim 1, characterized in that: A heat-conducting structural adhesive is arranged between the electrical device and the water-cooling plate.

9. The high-voltage copper busbar cooling structure for a power battery according to claim 8, characterized in that: The copper busbar is bonded to the water cooling plate by the heat conductive structural adhesive.

10. A vehicle, characterized in that: The vehicle comprises a high-voltage copper busbar cooling structure for a power battery according to any one of claims 1 to 9.

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