Power battery assembly and vehicle

Abstract

The present application relates to the technical field of power batteries, and in particular, to a power battery assembly and a vehicle. The power battery assembly comprises a high-voltage distribution device and a cooling plate; the cooling plate comprises a first cooling area and a second cooling area; the high-voltage distribution device is arranged opposite to the first cooling area; the second cooling area is used for cooling battery packs, and cooling liquid flow channels are arranged in both 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 distribution device, and the high-voltage distribution device is cooled by means of the cooling structures of existing battery packs, so that the driving range and safety of the whole vehicle are improved. Since electrical components in the high-voltage distribution device can achieve effective heat dissipation, lower-specification electrical components can be selected, so that the cost, weight, and spatial size of the electrical components are reduced, thereby reducing the cost of the entire battery energy distribution unit.

Description

Power battery assembly and vehicle

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 11, 2023, with application number 202311694443.0 and application name “Power Battery Assembly and Vehicle”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of power battery technology, and in particular to a power battery assembly and a vehicle. Background Art

[0003] As the power source for new energy vehicles, the high-voltage distribution device within the power battery plays a key role in the vehicle's high-voltage system. As the power battery's charge and charge / discharge current increase, the temperature of the electrical components within the high-voltage distribution device rises increasingly. This includes the high temperatures of the electrical connectors connecting the various electrical components. Severe temperature increases can cause the electrical components to age, shortening their lifespan and even causing battery pack fires. Currently, some automakers are adding water cooling modules to the high-voltage distribution device to reduce the temperature rise of the electrical components. However, this separate addition of a water cooling module not only increases development costs but also carries the risk of leakage within the high-voltage distribution device, impacting the safety and reliability of the entire high-voltage distribution device.

[0004] Application Contents

[0005] In order to solve the above technical problems, the present application provides a power battery assembly and a vehicle.

[0006] In a first aspect, the present application provides a power battery assembly, comprising: a high-voltage power distribution device and a cooling plate,

[0007] The cooling plate includes a first cooling area and a second cooling area; the high-voltage distribution device is installed in the first cooling area, and the battery pack is installed in the second cooling area, and coolant flow channels are arranged in the first cooling area and the second cooling area.

[0008] Optionally, the high-voltage power distribution device includes an electrical component and a mounting shell, the electrical connection row surface of the electrical component is arranged to fit the first cooling area, and the mounting shell is buckled on the first cooling area to form an installation space for accommodating the electrical component.

[0009] Optionally, the surface of the electrical connection row of the electrical component is arranged to fit the first cooling area via a heat conductive block.

[0010] Optionally, the electrical component is detachably mounted on the mounting shell, and a surface of the electrical connection row of the electrical component is coplanar with an opening of the mounting shell.

[0011] Optionally, the electrical component includes a plurality of loops, and the surface of the electrical connection row of each loop is coplanar with the opening of the mounting shell.

[0012] Optionally, an insulating film is provided between the high-voltage distribution device and the first cooling area, and the insulating film is attached to the cooling plate or the high-voltage distribution device, and the projection of the high-voltage distribution device on the cooling plate is within the projection range of the insulating film on the cooling plate.

[0013] Optionally, a temperature detection module is provided in the high-voltage power distribution device, and 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.

[0014] Optionally, a protective plate is further included, and the protective plate is fitted on the side of the first cooling area facing away from the high-voltage power distribution device.

[0015] 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 connected to the second cooling flow channel.

[0016] In a second aspect, the present application provides a vehicle utilizing the power battery assembly as described above.

[0017] The technical solution provided by the embodiments of the present application has the following advantages compared with the prior art:

[0018] The power battery assembly provided in the present application is used to cool the high-voltage distribution device by setting a first cooling area on the cooling plate, and using the cooling structure of the existing battery pack to cool the high-voltage distribution device, which can not only improve the endurance and safety of the entire vehicle, but also will not affect the internal layout of the power battery assembly. Since the first cooling area and the high-voltage distribution device are separated by the surface of the cooling plate, it can be ensured that the high-voltage distribution device will not be affected by faults such as 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, the high-voltage distribution device and the battery pack use the same set of cooling devices for cooling, and no additional cooling device is provided for the high-voltage distribution device.

[0019] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] FIG1 is a schematic structural diagram of a power battery assembly according to an embodiment of the present application;

[0023] FIG2 is a schematic structural diagram of a high-voltage power distribution device in a power battery assembly according to an embodiment of the present application;

[0024] FIG3 is a schematic structural diagram of an installation shell of a high-voltage power distribution device according to an embodiment of the present application;

[0025] FIG4 is a schematic structural diagram of a high-voltage power distribution device in a power battery assembly according to an embodiment of the present application installed on a cooling plate;

[0026] FIG5 is a schematic structural diagram of a first cooling area and a second cooling area in a power battery assembly according to an embodiment of the present application;

[0027] FIG6 is a diagram showing the working principle of the temperature detection module in the power battery assembly according to an embodiment of the present application.

[0028] Among them, 1. High-voltage distribution device; 11. Electrical components; 12. Mounting shell; 2. Cooling plate; 21. First cooling area; 22. Second cooling area; 31. First cooling channel; 32. Second cooling channel; 4. Heat-conducting block; 5. Insulating film; 6. Protective plate. Specific embodiments

[0029] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0031] The terms "first", "second", "third", "fourth", etc. (if any) 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 sequential order. It should be understood that the numbers used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] The technical solution of the present application is described in detail below in conjunction with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0033] This embodiment provides a power battery assembly and a vehicle, which provides a first cooling area on the cooling plate for cooling the high-voltage distribution device, and utilizes the cooling structure of the existing battery pack to cool the high-voltage distribution device, thereby improving the endurance and safety of the entire vehicle, while also not affecting the internal layout of the power battery assembly. Since the first cooling area and the high-voltage distribution device are separated by the surface of the cooling plate, it is possible to ensure that the high-voltage distribution device will not be affected by faults such as leakage in the first cooling area; it should be understood that the first cooling area can be a portion separated from the second cooling area, that is, the high-voltage distribution device and the battery pack use the same set of cooling devices for cooling, and no additional cooling device is provided for the high-voltage distribution device. The following is a detailed description of this through specific embodiments:

[0034] 1 to 6 , 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 including 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, and coolant flow channels are arranged in the first cooling area 21 and the second cooling area 22, wherein the first cooling area 21 is used to cool the high-voltage power distribution device 1, and the second cooling area 22 is used to cool the battery pack.

[0035] Among them, by setting a first cooling area 21 on the cooling plate 2 for cooling the high-voltage distribution device 1, the high-voltage distribution device 1 is cooled by using the cooling structure of the existing battery pack, which can not only improve the endurance and safety of the entire vehicle, but also will not affect the internal layout of the power battery assembly. Since the first cooling area 21 and the high-voltage distribution device 1 are separated by the surface of the cooling plate 2, it can be ensured that the high-voltage distribution device 1 will not be affected by faults such as 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, the high-voltage distribution device 1 and the battery pack use the same set of cooling devices for cooling, and no additional cooling device is provided for the high-voltage distribution device 1.

[0036] It should be understood that since the electrical components in the high-voltage distribution device 1 can achieve effective heat dissipation, the electrical components can also be selected with lower specifications to reduce the cost, quality and spatial size of the electrical components, thereby reducing the cost of the entire battery energy distribution unit.

[0037] In some embodiments, the high-voltage power distribution device 1 includes an electrical component 11 and a mounting shell 12. The surface of the electrical connection row of the electrical component 11 is fitted with the first cooling area 21. Specifically, the surface of the electrical connection row of the electrical component 11 can have a gap of 1-6 mm in height with the first cooling area 21, thereby preventing 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, the gap can also achieve the effect of heat dissipation of the electrical component 11 by the first cooling area 21. The mounting shell 12 is buckled on the first cooling area 21 and forms an installation space for accommodating the electrical component 11. By setting the mounting shell 12, the electrical component 1 can be 1 provides protection. It should be understood that the mounting shell 12 can be an insulating material, such as plastic, so as to improve the safety of the operator. It should be understood that the electrical component 11 is directly attached to the first cooling area 21 of the cooling plate 2. In this case, the mounting shell 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 shell 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 the high-voltage distribution device 1 and the first cooling area 21 are arranged relative to each other and the first cooling area 21 can cool the high-voltage distribution device 1.

[0038] In a further embodiment, the mounting shell 12 can provide a mounting and fixing structure for the electrical component 11, that is, the electrical component 11 can be fixedly mounted on the mounting shell 12, and then fixedly mounted on the cooling plate 2 together with the mounting shell 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 achieve the installation, fixing, insulation and protection of the electrical component 11 only through a separate shell.

[0039] Continuing with reference to Figure 2, the surface of the electrical connection row of the electrical component 11 is fitted with the first cooling area 21 through the heat-conducting block 4; it should be noted that the heat-conducting block 4 can be a structure such as heat-conducting foam, heat-conducting silica gel, or heat-conducting paste, as long as it can improve the heat exchange 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 to achieve a close fit between the two and reduce the impact of heat dissipation differences caused by fitting errors.

[0040] In some embodiments, the electrical component 11 can be removably mounted on the mounting shell 12, that is, the electrical component 11 can be mounted on the cooling plate 2 together with the mounting shell 12, and the electrical component 11 does not need to be connected to the cooling plate 2 through a fixed structure. The surface of the electrical connection row of the electrical component 11 is coplanar with the opening of the mounting shell 12 to ensure that when the mounting shell 12 is buckled on the cooling plate 2, the surface of the electrical connection row of the electrical component 11 can be just in contact with the cooling plate 2 to ensure the heat exchange efficiency between the two. In order to ensure the heat dissipation effect, the contact area between the electrical connection and the cooling plate 2 can be increased as much as possible, wherein the electrical connection includes the surface of the electrical connection row and the electrical connection point of the electrical component connection; electrical components that do not need to be cooled, that is, electrical components with lower heat generation, can be installed upright inside the high-voltage distribution device; it should be understood that there can be a certain surface difference between the surface of the electrical connection row of the electrical component 11 and the opening of the mounting shell 12, and the surface difference can be absorbed by adjusting the thickness of the heat conductive block 4, thereby ensuring the heat exchange efficiency between the surfaces of the electrical connection row of the electrical component 11.

[0041] Continuing with reference to Figures 2 and 4, the electrical component 11 includes multiple circuits, and the surface of the electrical connection bar of each circuit is coplanar with the opening of the mounting shell 12; it should be understood that the surface area of ​​the electrical connection bar 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 bar, thereby achieving better heat dissipation effect.

[0042] In some embodiments, an insulating film 5 is provided between the high-voltage distribution device 1 and the first cooling area 21. The insulating film 5 is attached to the cooling plate 2 or the high-voltage distribution device 1. The projection of the high-voltage 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 distribution device 1, completely isolating the high-voltage distribution device 1 from the cooling plate 2, thereby improving the safety and reliability of the high voltage.

[0043] 6 , a temperature detection module is provided in the high-voltage power distribution device 1 , which is electrically connected to the vehicle controller. The temperature detection module includes at least one temperature sensor, which is provided at an electrical connection point of the electrical component 11 . The number of temperature sensors may be the same as the number of electrical components 11 . A temperature sensor for monitoring the temperature of each electrical connection point of each electrical component 11 may be provided around the electrical connection point. The number of electrical components 11 may also be a multiple of the number of temperature sensors, so that a temperature sensor for monitoring the temperature of each point is provided at the center of the electrical connection points of several adjacent electrical components 11 . The temperature sensor may also be provided only at the electrical connection points of one or more electrical components 11 that are prone to high temperatures. The temperature detection module may monitor the temperature inside the high-voltage power distribution device 1 in real time through the safety monitoring module. When the temperature detects a fault and reaches a first alarm temperature, the fault is recorded without an alarm prompting maintenance. When the temperature detects that the second alarm temperature has been reached, the fault is recorded and a maintenance prompt is issued directly. It should be understood that the second alarm temperature is higher than the first alarm temperature. In some embodiments, when the first alarm temperature persists for a long time, an alarm may also be issued to prompt maintenance.

[0044] In a further embodiment, the high-voltage power distribution device 1 includes an inner main circuit, which 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 bar. 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 is connected in parallel with the main positive relay circuit via the electrical connection bar. The charging circuit includes a positive charging relay and a negative charging relay, and the charging circuit is connected in parallel with the discharge circuit. The mounting housing 12 of the high-voltage power distribution device 1 can be provided with an error-proofing structure to prevent incorrect connection of the pre-charge relay wiring harness.

[0045] In some embodiments, the power battery assembly also includes a protective plate 6, which is fitted on the side of the first cooling area 21 facing away from the high-voltage distribution device 1; through the setting of the protective plate 6, the first cooling channel 31 can be protected from damage caused by external impact, thereby improving the safety and reliability of the entire power battery assembly cooling system.

[0046] In some embodiments, the coolant flow channel includes a first cooling flow channel 31 arranged in the first cooling area 21 and a second cooling flow channel 32 arranged in the second cooling area 22; the first cooling flow channel 31 is connected to the second cooling flow channel 32; that is, the entire cooling plate 2 can use the same set of cooling equipment to cool the battery pack and the high-voltage distribution device 1 at the same time, and it is only necessary to open a first cooling flow channel 31 connected to the second cooling flow channel 32 in the first cooling area 21; wherein the first cooling flow channel 31 and the second cooling flow channel 32 can both be flow channels arranged in a U-shape or 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 cooling flow channel 31 can specifically be two groups of flow channel structures arranged symmetrically, or it can be multiple groups of flow channel structures evenly arranged along a certain direction.

[0047] In a second aspect, the present application provides a vehicle utilizing the power battery assembly as described above.

[0048] The specific implementation method and implementation principle are the same as those in the above embodiment, and can bring the same or similar technical effects, which will not be described here one by one. For details, please refer to the description of the above power battery assembly embodiment.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0050] The foregoing description is intended only to provide specific embodiments of the present application, which will enable those skilled in the art to understand and implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments described herein, but is intended to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A power battery assembly, wherein: include: High voltage distribution units and cooling panels, The cooling plate comprises a first cooling region and a second cooling region; 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.

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

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

4. The power battery assembly according to claim 2, wherein: The electrical component is detachably mounted on the mounting shell, and a surface of an electrical connection row of the electrical component is coplanar with an opening of the mounting shell.

5. The power battery assembly according to claim 4, wherein: The electrical component includes a plurality of loops, and a surface of an electrical connection row of each loop is coplanar with an opening of the mounting shell.

6. The power battery assembly according to claim 1, wherein: 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. 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, wherein: 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. The temperature sensor is provided at an electrical connection point of the electrical component.

8. The power battery assembly according to claim 1, wherein: It also includes a protective plate, which is arranged on 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, wherein: 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 channel is communicated with the second cooling channel.

10. A vehicle, wherein: Comprising a power battery assembly as described in any one of claims 1 to 9.

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