Power battery assembly and vehicle

Abstract

The invention relates to the technical field of power batteries, in particular to a power battery assembly and a vehicle. The power battery assembly comprises a high-voltage power distribution device and a cooling plate, wherein the cooling plate comprises a first cooling area and a second cooling area; the high-voltage power distribution device is arranged opposite to the first cooling area, the second cooling area is used for cooling a battery pack, and cooling liquid flow channels are distributed in the first cooling area and the second cooling area. According to the power battery assembly, the first cooling area is arranged on the cooling plate and used for cooling the high-voltage power distribution device, a cooling structure of an existing battery pack is used for cooling the high-voltage power distribution device, and the cruising ability and safety of a whole vehicle are improved; due to the fact that the electrical parts in the high-voltage power distribution device can achieve effective heat dissipation, the electrical parts with lower specifications can be selected, the cost, the mass and the space size of the electrical parts are reduced, and the cost of the whole battery energy distribution unit is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and particularly to a power battery assembly and a vehicle. Background Art

[0002] As the power source of new energy vehicles, the high-voltage power distribution device inside the power battery plays a key role in the vehicle's high-voltage system. With the increase in the power battery's power and the increase in the charging / discharging current, the temperature rise of the electrical components in the high-voltage power distribution device is getting higher and higher. The temperature of the electrical connection bars connecting each electrical component is very high. If the temperature rises severely, it may cause the aging of the electrical components, affect their lifespan, and even cause the battery pack to catch fire. Currently, some vehicle manufacturers have started to add a water-cooling module to the high-voltage power distribution device to reduce the temperature rise of the electrical components in the high-voltage power distribution device. Adding such a water-cooling module alone not only increases the development cost but also has the risk of liquid leakage inside the high-voltage power distribution device, thus affecting the safety and reliability of the entire high-voltage power distribution device. Summary of the Invention

[0003] To solve the above technical problems, the present application provides a power battery assembly and a vehicle.

[0004] In a first aspect, the present application provides a power battery assembly, including: a high-voltage power distribution device and a cooling plate,

[0005] The cooling plate includes a first cooling area and a second cooling area; the high-voltage power distribution device is installed in the first cooling area, and the battery pack is installed in the second cooling area. Coolant flow channels are arranged in both the first cooling area and the second cooling area.

[0006] Optionally, the high-voltage power distribution device includes an electrical component and an installation shell. The surface of the electrical connection bar of the electrical component is arranged in contact with the first cooling area, and the installation shell is buckled on the first cooling area and forms an installation space for accommodating the electrical component.

[0007] Optionally, the surface of the electrical connection bar of the electrical component is arranged in contact with the first cooling area through a heat conduction block.

[0008] Optionally, the electrical component is detachably installed on the installation shell, and the surface of the electrical connection bar of the electrical component is coplanar with the opening of the installation shell.

[0009] Optionally, the electrical component includes multiple circuits, and the surface of the electrical connection bar of each circuit is coplanar with the opening of the installation shell.

[0010] Optionally, an insulating film is provided between the high-voltage power distribution device and the first cooling area. The insulating film is attached to the cooling plate or the high-voltage power distribution device, and the projection of the high-voltage power distribution device on the cooling plate is within the projection range of the insulating film on the cooling plate.

[0011] Optionally, a temperature detection module is provided in the high-voltage power distribution device. The temperature detection module is electrically connected to the vehicle controller. The temperature detection module includes at least one temperature sensor, and the temperature sensor is arranged at the electrical connection point of the electrical component.

[0012] Optionally, a protective plate is further included, and the protective plate is attached to the side of the first cooling area facing away from the high-voltage power distribution device.

[0013] Optionally, the coolant flow channel includes a first cooling flow channel arranged in the first cooling area and a second cooling flow channel arranged in the second cooling area; the first cooling flow channel is communicated with the second cooling flow channel.

[0014] In a second aspect, the present application provides a vehicle using the power battery assembly as described above.

[0015] The technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0016] For the power battery assembly provided by the present application, by providing a first cooling area on the cooling plate for cooling the high-voltage power distribution device, and using the cooling structure of the existing battery pack to cool the high-voltage power distribution device, it can not only improve the cruising range and safety of the whole vehicle, but also will not affect the internal layout work of the power battery assembly. Since the first cooling area and the high-voltage power distribution device are separated by the surface of the cooling plate, it can ensure that the high-voltage power distribution device will not be affected by the leakage of the first cooling area and other faults; it should be understood that the first cooling area can be a part separated from the second cooling area, that is to say, the high-voltage power distribution device and the battery pack use the same set of cooling devices for cooling, and no additional cooling device is added for the high-voltage power distribution device. Description of the Drawings

[0017] The drawings here are incorporated into the specification and constitute a part of this specification, showing the embodiments conforming to the present application, and are used together with the specification to explain the principles of the present application.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0019] Figure 1 Structural schematic diagram of the power battery assembly described in the embodiment of the present application;

[0020] Figure 2 Structural schematic diagram of the high-voltage power distribution device in the power battery assembly described in the embodiment of the present application;

[0021] Figure 3 Structural schematic diagram of the installation shell of the high-voltage power distribution device described in the embodiment of the present application;

[0022] Figure 4 Structural schematic diagram of the high-voltage power distribution device in the power battery assembly described in the embodiment of the present application installed on the cooling plate;

[0023] Figure 5 Structural schematic diagram of the first cooling area and the second cooling area in the power battery assembly described in the embodiment of the present application;

[0024] Figure 6 Working principle diagram of the temperature detection module in the power battery assembly described in the embodiment of the present application.

[0025] Among them, 1. High-voltage power distribution device; 11. Electrical components; 12. Installation shell; 2. Cooling plate; 21. First cooling area; 22. Second cooling area; 31. First cooling flow channel; 32. Second cooling flow channel; 4. Heat conduction block; 5. Insulating film; 6. Protective plate. Detailed implementation manners

[0026] In order to be able to more clearly understand the above-mentioned objects, features and advantages of the present application, the solutions of the present application will be further described below. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0027] Many specific details are set forth in the following description in order to fully understand the present application, but the present application can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present application, rather than all of the embodiments.

[0028] Based on this, this embodiment provides a power battery assembly and a vehicle. By providing a first cooling area on the cooling plate for cooling the high-voltage power distribution device, and using the cooling structure of the existing battery pack to cool the high-voltage power distribution device, it can not only improve the endurance and safety of the whole vehicle, but also will not affect the layout work inside the power battery assembly. Since the first cooling area and the high-voltage power distribution device are separated by the surface of the cooling plate, it can ensure that the high-voltage power distribution device will not be affected by faults such as liquid leakage in the first cooling area. It should be understood that the first cooling area can be a part separated from the second cooling area, that is to say, the high-voltage power distribution device and the battery pack use the same set of cooling devices for cooling, and no additional cooling device is added for the high-voltage power distribution device. The following will be described in detail through specific embodiments:

[0029] Referring to Figures 1 to 6 As shown, a power battery assembly provided in this embodiment includes: a high-voltage power distribution device 1 and a cooling plate 2. The cooling plate 2 includes a first cooling area 21 and a second cooling area 22. The high-voltage power distribution device 1 is installed in the first cooling area 21, and the battery pack is installed in the second cooling area 22. Coolant flow channels are arranged in both the first cooling area 21 and the second cooling area 22. Among them, the first cooling area 21 is used to cool and lower the temperature of the high-voltage power distribution device 1, and the second cooling area 22 is used to cool and lower the temperature of the battery pack.

[0030] Among them, by providing a first cooling area 21 on the cooling plate 2 for cooling the high-voltage power distribution device 1, and using the cooling structure of the existing battery pack to cool the high-voltage power distribution device 1, it can not only improve the endurance and safety of the whole vehicle, but also will not affect the layout work inside the power battery assembly. Since the first cooling area 21 and the high-voltage power distribution device 1 are separated by the surface of the cooling plate 2, it can ensure that the high-voltage power distribution device 1 will not be affected by faults such as liquid leakage in the first cooling area 21. It should be understood that the first cooling area 21 can be a part separated from the second cooling area 22, that is to say, the high-voltage power distribution device 1 and the battery pack use the same set of cooling devices for cooling, and no additional cooling device is added for the high-voltage power distribution device 1.

[0031] It should be understood that since the electrical components in the high-voltage power distribution device 1 can achieve effective heat dissipation, at this time, electrical components with lower specifications can also be selected to reduce the cost, quality and space size of the electrical components, thereby reducing the cost of the entire battery energy distribution unit.

[0032] In some embodiments, the high-voltage power distribution device 1 includes an electrical component 11 and a mounting case 12. The surface of the electrical connection row of the electrical component 11 is arranged in contact with the first cooling area 21. Specifically, there may be a gap with a height of 1-6 mm between the surface of the electrical connection row of the electrical component 11 and the first cooling area 21, so as to prevent problems such as extrusion deformation of the electrical component 11 and the cooling plate 2 due to processing tolerances and assembly errors. At the same time, this gap can also achieve the effect of the first cooling area 21 dissipating heat from the electrical component 11. The mounting case 12 is buckled on the first cooling area 21 and forms a mounting space for accommodating the electrical component 11; through the setting of the mounting case 12, protection can be provided for the electrical component 11. It should be understood that the mounting case 12 can be made of an insulating material, such as plastic, etc., so as to improve the safety of the operating workers; it should be understood that the electrical component 11 is directly arranged in contact with the first cooling area 21 of the cooling plate 2. At this time, the mounting case 12 can be an open structure and only needs to be installed on the cooling plate 2 together with the electrical component 11; it should be noted that the mounting case 12 can be fixedly connected to the cooling plate 2 or connected to other vehicle body structures near the cooling plate 2, as long as it can ensure that the high-voltage power distribution device 1 is arranged opposite to the first cooling area 21 and the first cooling area 21 can cool the high-voltage power distribution device 1.

[0033] In a further embodiment, the mounting case 12 can provide a mounting and fixing structure for the electrical component 11. That is to say, the electrical component 11 can be fixedly installed on the mounting case 12 and then fixedly installed on the cooling plate 2 together with the mounting case 12; such a setting can further improve the integrity of the entire high-voltage power distribution device 1. At the same time, the high-voltage power distribution device 1 can realize functions such as mounting, fixing, insulation, and protection of the electrical component 11 only through a single housing.

[0034] Continue to refer to Figure 2 As shown, the surface of the electrical connection row of the electrical component 11 is arranged in contact with the first cooling area 21 through a heat-conducting block 4; it should be noted that the heat-conducting block 4 can be a heat-conducting foam, heat-conducting silica gel, heat-conducting sticker, etc. As long as it can improve the heat transfer efficiency between the surface of the electrical connection row and the cooling plate 2, the heat-conducting block 4 can also absorb the gap between the surface of the electrical connection row and the cooling plate 2, realize their close fit, and reduce the influence of poor heat dissipation caused by the fit error.

[0035] In some embodiments, the electrical component 11 is detachably mounted on the mounting case 12. That is to say, the electrical component 11 can be mounted on the cooling plate 2 together with the mounting case 12, and there is no need to connect the electrical component 11 to the cooling plate 2 through a fixing structure. The surface of the electrical connection row of the electrical component 11 is coplanar with the opening of the mounting case 12, so as to ensure that when the mounting case 12 is buckled on the cooling plate 2, the surface of the electrical connection row of the electrical component 11 can just fit with the cooling plate 2, so as to ensure the heat exchange efficiency between the two. In order to ensure the heat dissipation effect, the contact area between the electrical connection part and the cooling plate 2 can be increased as much as possible. The electrical connection part includes the surface of the electrical connection row and the electrical connection point at the electrical component connection part; the electrical components that do not need to be cooled, that is, the electrical components with lower heat generation, can be mounted upright inside the high-voltage power distribution device; it should be understood that there may be a certain surface difference between the surface of the electrical connection row of the electrical component 11 and the opening of the mounting case 12, and this surface difference can be absorbed by adjusting the thickness of the heat conduction block 4, so as to ensure the heat exchange efficiency between the surfaces of the electrical connection row of the electrical component 11.

[0036] Continue to refer to Figure 2 and Figure 4 As shown, the electrical component 11 includes a plurality of circuits, and the surface of the electrical connection row of each circuit is coplanar with the opening of the mounting case 12; it should be understood that the surface area of the electrical connection row of each circuit is positively correlated with its own heat generation, that is, the greater the heat generation, the larger the surface area of the electrical connection row, and thus the better the heat dissipation effect.

[0037] In some embodiments, an insulating film 5 is provided between the high-voltage power distribution device 1 and the first cooling area 21. The insulating film 5 is attached to the cooling plate 2 or the high-voltage power distribution device 1. The projection of the high-voltage power distribution device 1 on the cooling plate 2 is within the projection range of the insulating film 5 on the cooling plate 2. The insulating film 5 covers the entire high-voltage power distribution device 1 to completely isolate the high-voltage power distribution device 1 from the cooling plate 2 and improve the high-voltage safety and reliability.

[0038] Continue to refer to Figure 6As shown, a temperature detection module is provided inside the high-voltage power distribution device 1. The temperature detection module is electrically connected to the vehicle controller. The temperature detection module includes at least one temperature sensor, and the temperature sensor is arranged at the electrical connection point of the electrical component 11. Among them, the number of temperature sensors can be the same as the number of electrical components 11. A temperature sensor for monitoring the temperature of this point is arranged around the electrical connection point of each electrical component 11. It can also be that the number of electrical components 11 is several times the number of temperature sensors, so that a temperature sensor for monitoring the temperature of this point is arranged at the center position of the electrical connection of several adjacent electrical components 11. The temperature sensor can also be only arranged at the electrical connection of one or more electrical components 11 that are prone to generate high temperatures; among them, the temperature detection module can monitor the temperature inside the high-voltage power distribution device 1 in real time through the safety monitoring module. When a temperature fault is detected and reaches the first alarm temperature, the fault is recorded and there is no need for an alarm to prompt maintenance. When the temperature is detected to have reached the second alarm temperature, the fault is recorded and directly prompts maintenance. It should be understood that the second alarm temperature is higher than the first alarm temperature; in some embodiments, when the first alarm temperature lasts for a long time, an alarm can also be given to prompt maintenance.

[0039] In a further embodiment, the high-voltage power distribution device 1 includes an internal main circuit. The internal main circuit includes a main circuit, a discharge circuit, a pre-charge circuit, a charging circuit, and a low-voltage circuit. The main circuit includes a current sensor, a fuse, and an electrical connection row; the discharge circuit includes a main positive relay and a main negative relay; the pre-charge circuit includes a pre-charge relay and a pre-charge resistor, and the pre-charge circuit is connected in parallel with the main positive relay circuit through the electrical connection row; the charging circuit includes a charging positive relay and a charging negative relay, and the charging circuit is connected in parallel with the discharge circuit. The installation shell 12 of the high-voltage power distribution device 1 can be provided with an anti-misconnection structure to prevent misconnection of the pre-charge relay wiring harness.

[0040] In some embodiments, the power battery assembly further includes a protective plate 6. The protective plate 6 is attached to the side of the first cooling area 21 facing away from the high-voltage power distribution device 1; through the setting of the protective plate 6, it is possible to protect the first cooling channel 31 from being damaged by external impacts, and improve the safety and reliability of the entire power battery assembly cooling system.

[0041] In some embodiments, the coolant flow channels include a first coolant flow channel 31 arranged in the first cooling region 21 and a second coolant flow channel 32 arranged in the second cooling region 22; the first coolant flow channel 31 communicates with the second coolant flow channel 32; that is to say, the entire cooling plate 2 can use the same set of cooling equipment to cool the battery pack and the high-voltage power distribution device 1 simultaneously, and only the first coolant flow channel 31 communicating with the second coolant flow channel 32 needs to be opened in the first cooling region 21; wherein both the first coolant flow channel 31 and the second coolant flow channel 32 can be flow channels arranged in a figure-eight shape or an S shape, as long as the heat exchange area between the coolant and the heat dissipation structure on the cooling plate 2 can be increased and the heat exchange efficiency can be improved; the first coolant flow channel 31 can specifically be two sets of symmetrically arranged flow channel structures, or can also be multiple sets of flow channel structures uniformly arranged in a certain direction.

[0042] In a second aspect, the present application provides a vehicle using the power battery assembly as described above.

[0043] The specific implementation manners and implementation principles are the same as those of the above embodiments, and can bring the same or similar technical effects, which will not be elaborated one by one here, and can specifically refer to the description of the above power battery assembly embodiments.

[0044] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

[0045] The above are only the specific implementation manners of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power battery assembly, characterized in that, it includes: a high-voltage power distribution device and a cooling plate, the cooling plate includes a first cooling area and a second cooling area; the high-voltage power distribution device is installed in the first cooling area, the battery pack is installed in the second cooling area, and coolant flow channels are arranged in both the first cooling area and the second cooling area.

2. The power battery assembly according to claim 1, characterized in that, the high-voltage power distribution device includes an electrical component and an installation shell, the surface of the electrical connection row of the electrical component is arranged in contact with the first cooling area, the installation shell is buckled on the first cooling area, and an installation space for accommodating the electrical component is formed.

3. The power battery assembly according to claim 2, characterized in that, the surface of the electrical connection row of the electrical component is arranged in contact with the first cooling area through a heat conducting block.

4. The power battery assembly according to claim 2, characterized in that, the electrical component is detachably installed on the installation shell, and the surface of the electrical connection row of the electrical component is coplanar with the opening of the installation shell.

5. The power battery assembly according to claim 4, characterized in that, the electrical component includes a plurality of circuits, and the surface of the electrical connection row of each circuit is coplanar with the opening of the installation shell.

6. The power battery assembly according to claim 1, characterized in that, an insulating film is provided between the high-voltage power distribution device and the first cooling area, the insulating film is attached to the cooling plate or the high-voltage power distribution device, and the projection of the high-voltage power distribution device on the cooling plate is within the projection range of the insulating film on the cooling plate.

7. The power battery assembly according to claim 2, characterized in that, a temperature detection module is provided in the high-voltage power distribution device, the temperature detection module is electrically connected to the vehicle controller, the temperature detection module includes at least one temperature sensor, and the temperature sensor is arranged at the electrical connection point of the electrical component.

8. The power battery assembly according to claim 1, characterized in that, it further includes a protective plate, and the protective plate is arranged in contact with the side of the first cooling area facing away from the high-voltage power distribution device.

9. The power battery assembly according to any one of claims 1 to 8, characterized in that, the coolant flow channel includes a first cooling flow channel arranged in the first cooling area and a second cooling flow channel arranged in the second cooling area; the first cooling flow channel is communicated with the second cooling flow channel.

10. A vehicle, characterized in that, it includes the power battery assembly according to any one of claims 1 to 9.

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