High voltage distribution box and battery pack components and vehicles

Abstract

The utility model discloses a high-voltage distribution box and a battery pack assembly and a car, wherein the high-voltage distribution box and the battery pack assembly comprises a battery pack and a high-voltage distribution box, the battery pack comprises a battery module and a cooling structure for heat exchange with the battery module; the high-voltage distribution box also heat exchanges with the cooling structure. The technical solution of the utility model can improve the heat dissipation efficiency of the high-voltage distribution box while being conducive to reducing the volume of the high-voltage distribution box.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to an assembly of a high-voltage distribution box and a battery pack and an automobile. Background Art

[0002] As the market becomes more and more sensitive to the charging speed of electric vehicles, super-fast charging has become a pain point for consumers when purchasing electric vehicles. Super-fast charging is mainly achieved by increasing the charging current. As the charging current becomes larger and larger, the battery needs to be effectively cooled.

[0003] In the related technology, with the development of high voltage, high current, and super-fast charging battery packs, due to the poor heat dissipation of the high-voltage distribution box, it is necessary to select electrical components with large current carrying capacity and higher specifications such as fuses, relays, contactors, etc., resulting in a larger high-voltage distribution box, which occupies more space for the components of the high-voltage distribution box and the battery pack, and increases the weight and cost of the components of the high-voltage distribution box and the battery pack. Utility Model Content

[0004] The main purpose of the utility model is to provide an assembly of a high-voltage distribution box and a battery pack, aiming to improve the heat dissipation efficiency of the high-voltage distribution box while reducing the volume of the high-voltage distribution box.

[0005] To achieve the above-mentioned purpose, the utility model proposes an assembly of a high-voltage distribution box and a battery pack, including a battery pack and a high-voltage distribution box. The battery pack includes a battery module and a cooling structure that heat exchanges with the battery module; the high-voltage distribution box also heat exchanges with the cooling structure.

[0006] Optionally, the battery pack further comprises a battery box, the battery module is arranged in the battery box, and the cooling structure constitutes at least a portion of the box wall of the battery box.

[0007] Optionally, the high-voltage distribution box is also arranged in the battery box;

[0008] The cooling structure constitutes the bottom wall of the battery box, or the cooling structure is arranged on the bottom wall of the battery box.

[0009] Optionally, the high-voltage distribution box includes a contactor and a conductor connected to the contactor, and a thermal pad is provided between the conductor and the cooling structure.

[0010] Optionally, the conductor part includes a contact portion and a recessed portion that are connected to each other, the contact portion has a contact plane, the contact plane is in contact with the thermal pad, the recessed portion is recessed compared to the contact plane, the fixing member passes through the bottom wall of the recessed portion to be connected to the contactor, and the head of the fixing member is accommodated in the recessed portion.

[0011] Optionally, the contactor is provided with an insulating baffle located in the recessed portion and used to isolate the two electrodes, and the insulating baffle is lower than the contact plane.

[0012] Optionally, the conductor member and the shell of the high-voltage distribution box are integrally injection molded.

[0013] Optionally, a seal is provided between an edge of the shell of the high-voltage distribution box and the cooling structure.

[0014] Optionally, an insulating heat-conducting layer is provided on the side of the cooling structure for heat exchange with the high-voltage distribution box.

[0015] Optionally, the cooling structure is configured as a water cooling plate or a metal heat sink or a battery tray.

[0016] The utility model also provides a car, comprising the above-mentioned high-voltage distribution box and battery pack assembly.

[0017] The components of the high-voltage distribution box and the battery pack have at least the following beneficial effects:

[0018] The technical solution of the utility model adopts a battery pack and a high-voltage distribution box. The battery pack includes a battery module and a cooling structure that heat exchanges with the battery module; the high-voltage distribution box also heats with the cooling structure. Specifically, the present solution allows the battery module and the high-voltage distribution box to share a cooling structure, so that the cooling structure dissipates heat for both the battery module and the high-voltage distribution box. Therefore, the high-voltage distribution box does not need to enlarge heat dissipation parts such as contactors to increase heat dissipation efficiency; it also does not need to re-set the heat dissipation structure, that is, it is not necessary to set heat dissipation components such as water pipe joints connected to the high-voltage distribution box, thereby reducing the volume of the high-voltage distribution box and the space occupied by the high-voltage distribution box and the components of the high-voltage distribution box and the battery pack, thereby reducing the weight and cost of the components of the high-voltage distribution box and the battery pack. It can be seen that the technical solution of the utility model can improve the heat dissipation efficiency of the high-voltage distribution box while helping to reduce the volume of the high-voltage distribution box. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of an embodiment of an assembly of a high-voltage power distribution box and a battery pack of the utility model;

[0021] Figure 2It is a structural schematic diagram of the components of the high-voltage distribution box and the battery pack of the utility model;

[0022] Figure 3 It is a partial structural schematic diagram of the components of the high-voltage distribution box and the battery pack of the utility model;

[0023] Figure 4 A schematic diagram of the structure of a high-voltage power distribution box of the utility model, which is an assembly of a high-voltage power distribution box and a battery pack;

[0024] Figure 5 A schematic cross-sectional view of a high-voltage distribution box of an assembly of a high-voltage distribution box and a battery pack of the utility model;

[0025] Figure 6 The figure is a partial structural diagram of a high-voltage distribution box of the utility model, which is an assembly of a high-voltage distribution box and a battery pack.

[0026] Description of Figure Numbers:

[0027] Label name Label name 100 Battery Pack 220 Conductor 110 Battery Module 221 Contact plane 120 Cooling structure 222 Depression 130 Battery box 230 case 200 High voltage distribution box 300 Thermal pad 210 Contactor 400 Fixings 211 Insulation baffle 500 Seals

[0028] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0033] The utility model provides an assembly of a high-voltage power distribution box and a battery pack.

[0034] Reference Figures 1 to 3 In one embodiment of the utility model, the assembly of the high-voltage distribution box and the battery pack includes a battery pack 100 and a high-voltage distribution box 200. The battery pack 100 includes a battery module 110 and a cooling structure 120 for heat exchange with the battery module 110; the high-voltage distribution box 200 also has heat exchange with the cooling structure 120.

[0035] Specifically, the present solution allows the battery module 110 and the high-voltage distribution box 200 to share the cooling structure 120, so that the cooling structure 120 dissipates heat for both the battery module 110 and the high-voltage distribution box 200. Therefore, the high-voltage distribution box 200 does not need to enlarge the heat dissipation parts such as the contactor 210 to increase the heat dissipation efficiency; it also does not need to re-set the heat dissipation structure, that is, it does not need to set heat dissipation parts such as water pipe joints connected to the high-voltage distribution box 200, thereby reducing the volume of the high-voltage distribution box 200 and the space occupied by the high-voltage distribution box 200 in the components of the high-voltage distribution box and the battery pack, thereby reducing the weight and cost of the components of the high-voltage distribution box and the battery pack. It can be seen that the technical solution of the present utility model can improve the heat dissipation efficiency of the high-voltage distribution box 200 while helping to reduce the volume of the high-voltage distribution box 200.

[0036] Optionally, in this embodiment, the battery pack 100 further includes a battery box 130, the battery module 110 is disposed in the battery box 130, and the cooling structure 120 constitutes at least part of the box wall of the battery box 130; compared with the traditional heat dissipation structure in which the cooling structure is placed at the bottom of the battery cell of the battery module and located in the battery box 130, this solution configures the cooling structure 120 to constitute at least part of the box wall of the battery box 130, which can not only ensure the sealing of the battery pack 100, but also help to improve the heat exchange assembly efficiency of the cooling structure 120 and the high-voltage distribution box 200. Of course, the utility model is not limited to this. In other embodiments, the cooling structure 120 can also be independently arranged from the box wall of the battery box 130, and the cooling structure 120 can be arranged on the box wall of the battery box 130.

[0037] Furthermore, in one embodiment, the high-voltage distribution box 200 is also arranged in the battery box 130, and the cooling structure 120 constitutes the bottom wall of the battery box 130; specifically, the high-voltage distribution box 200 is fitted with one side of the cooling structure 120, so that the Z-direction space of the battery pack 100 can be fully utilized, the connection length of the conductor 220 can be reduced, and the space in the X-direction and Y-direction of the battery pack 100 can be saved, which not only meets the space requirements of the battery pack 100, but also can cool the high-voltage distribution box 200 actively to meet the heat dissipation requirements of the high-voltage distribution box 200, forming a set of reliable and stable high-voltage distribution box and battery pack components. The high-voltage distribution box 200 and the cooling structure 120 are in contact with each other for heat exchange to export the heat of the high-voltage distribution box 200, so that the heat exchange path between the high-voltage distribution box 200 and the cooling structure 120 can be reduced, thereby accelerating the heat dissipation efficiency of the high-voltage distribution box 200.

[0038] In the second embodiment, the high-voltage distribution box 200 is also disposed in the battery box 130 , and the cooling structure 120 is disposed on the bottom wall of the battery box 130 . Specifically, the high-voltage distribution box 200 is in contact with one side of the cooling structure 120 .

[0039] It should be noted that the high-voltage distribution box 200 is disposed at one end of the battery box 130 , and the cooling structure 120 is disposed below the high-voltage distribution box 200 .

[0040] Reference Figures 3 to 5 Further, in this embodiment, the high-voltage distribution box 200 includes a contactor 210 and a conductor 220 connected to the contactor 210, and a thermal pad 300 is provided between the conductor 220 and the cooling structure 120. It can be understood that the provision of the thermal pad 300 can increase the heat exchange efficiency of the conductor 220, thereby improving the heat dissipation efficiency of the conductor 220, and further improving the heat dissipation efficiency of the high-voltage distribution box 200. Of course, the utility model is not limited to this. In other embodiments, the conductor 220 can also be directly in contact with the cooling structure 120 without providing the thermal pad 300.

[0041] The thermal pad 300 is made of a material with a high thermal conductivity, and the two sides of the thermal pad are in contact with the conductor 220 and the cooling structure 120 respectively. The thermal conductivity of the thermal pad 300 is higher than that of the conductor 220 .

[0042] In this embodiment, there are multiple conductors 220, and the conductors 220 include but are not limited to copper bars of the conductor type connected to the contactor 210. In other embodiments, aluminum bars, copper wires, aluminum wires and other conductors may also be used.

[0043] It should be noted that the fast charging operating circuit of the high-voltage distribution box 200 is: first fast charging positive copper bar → fast charging positive contactor → second fast charging positive copper bar → battery positive copper bar → second battery negative copper bar → first battery negative copper bar → fast charging negative contactor → fast charging negative copper bar.

[0044] The second battery negative copper bar is the same copper bar as the first battery negative copper bar. The first fast-charge positive copper bar, the second fast-charge positive copper bar, the battery positive copper bar, and the first battery negative copper bar are copper bars connected to the contactor 210, which are directly in contact with the thermal pad 300, pressing the thermal pad 300 onto the battery case 130, and dissipating heat through the cooling system of the battery pack 100. Therefore, the current carrying capacity of the high-voltage distribution box 200 can be greatly improved.

[0045] The discharge operating circuit of the high-voltage distribution box 200 is: battery positive copper bar → second fast-charging positive copper bar → discharge positive contactor → rear-drive positive copper bar → rear-drive negative copper bar → discharge negative contactor → first battery negative copper bar → second battery negative copper bar.

[0046] Among them, the second fast-charging positive copper bar, the rear-drive positive copper bar, the rear-drive negative copper bar, and the first battery negative copper bar are copper bars connected to the contactor 210. The principle is consistent with the fast-charging circuit and will not be repeated here.

[0047] Optionally, the conductor part 220 includes a contact portion and a recessed portion 222 connected to each other, the contact portion having a contact plane 221, the contact plane 221 contacts the thermal pad 300, the recessed portion 222 is recessed compared to the contact plane, the fixing member 400 passes through the bottom wall of the recessed portion 222 to be connected to the contactor 210, and the head of the fixing member 400 is accommodated in the recessed portion 222. It can be understood that the recessed portion 222 is provided, and the fixing member 400 is used to pass through the bottom wall of the recessed portion 222 to be connected to the contactor 210, and the head of the fixing member 400 is accommodated in the recessed portion 222. In this way, the fixing member 400 of the contactor 210 can be prevented from protruding from the contact plane 221, thereby preventing the fixing member 400 from lifting the cooling structure 120, which causes the contact plane 221 to be unable to contact the cooling structure 120, thereby causing the heat of the conductor part 220 to be unable to be conducted away.

[0048] Specifically, the recessed portion 222 is recessed toward the side away from the cooling structure 120, the bottom of the recessed portion 222 is fitted and connected to the contactor 210, the heat conductor is connected to the contactor 210 through the fixing member 400, and the end of the fixing member 400 is located in the recessed portion 222, which is convenient for assembling the heat conductor and the contactor 210, while avoiding contact interference between the fixing member 400 and the cooling structure 120, ensuring the contact area between the contact plane 221 and the thermal pad 300, thereby ensuring the heat dissipation efficiency of the high-voltage distribution box.

[0049] Among them, the head of the fixing member 400 is lower than the contact plane 221, which can reduce the probability of the cooling structure 120 being locally uneven due to process errors, so that the head of the fixing member 400 interferes with the cooling structure 120, which is beneficial to increase the contact area between the contact plane 221 and the cooling structure 120, thereby increasing the heat dissipation efficiency of the high-voltage distribution box 200. Of course, the utility model is not limited to this, and in other embodiments, the head end face of the fixing member 400 can also be flush with the contact plane 221.

[0050] Furthermore, in the present embodiment, the fixing member 400 is a bolt, but the present invention is not limited thereto. In other embodiments, the fixing member 400 may also be configured as a screw, and no specific limitation is made to the fixing member 400 herein.

[0051] Optionally, the contactor 210 is provided with an insulating baffle 211 located in the recessed portion 222 and used to isolate the two electrodes, and the insulating baffle 211 is lower than the contact plane 221; this can reduce the probability of the insulating baffle 211 interfering with the cooling structure 120 due to process errors and local unevenness of the cooling structure 120, which is conducive to increasing the contact area between the contact plane 221 and the cooling structure 120, thereby increasing the heat dissipation efficiency of the high-voltage distribution box 200. Of course, the utility model is not limited to this, and in other embodiments, the top surface of the insulating baffle 211 can also be flush with the contact plane 221.

[0052] Furthermore, the conductor part 220 and the shell 230 of the high-voltage distribution box 200 are integrally injection molded; it can be understood that the conductor part 220 has multiple, multiple conductor parts 220 and the shell 230 of the high-voltage distribution box are integrally injection molded, which can improve the shape and position dimensions of the conductor parts 220 with respect to each other, such as but not limited to the single flatness of the conductor parts 220 and the parallelism with each other, which facilitates the effective connection between the conductor part 220 and the contact of the contactor 210, reduces the contact resistance and improves the contact resistance stability.

[0053] Moreover, by integrally injection molding the conductor part 220 and the shell 230 of the high-voltage distribution box 200, the assembly step of the conductor part 220 and the shell 230 of the high-voltage distribution box 200 can be omitted, which not only saves the assembly steps of the components of the high-voltage distribution box and the battery pack, improves the installation efficiency, but also helps to reduce assembly errors.

[0054] Reference Figure 4 and Figure 6 Optionally, a seal 500 is provided between the edge of the shell 230 of the high-voltage distribution box 200 and the cooling structure 120. It can be understood that the seal 500 can prevent water vapor in the battery pack 100 from entering the interior of the high-voltage distribution box 200, thereby avoiding short circuit and arcing of the high-voltage distribution box 200.

[0055] The seal 500 can prevent water vapor from entering the housing 230 of the high-voltage distribution box 200, causing a short circuit or insulation failure of the high-voltage distribution box 200. The failure path is as follows:

[0056] Positive copper bar, first fast charging positive copper bar / second fast charging positive copper bar / battery positive copper bar / rear drive positive copper bar and negative copper bar, rear drive negative copper bar / first battery negative copper bar / fast charging negative copper bar / second battery negative copper bar. When any of the above positive copper bar and any of the negative copper bar come into contact with water vapor at the same time, a fault may occur: when the amount of water vapor is small, the fault phenomenon is insulation failure; when the amount of water vapor is large and the water level does not cover the positive and negative copper bars, the fault phenomenon is a short circuit.

[0057] The seal 500 is a sealing ring, which is arranged at the edge of the shell 230 of the high-voltage distribution box 200 , so as to block the edge gap of the shell 230 and improve the sealing performance of the shell 230 of the high-voltage distribution box 200 .

[0058] Furthermore, an insulating thermal conductive layer is provided on the side of the heat exchange between the cooling structure 120 and the high-voltage distribution box 200. The thickness of the insulating thermal conductive layer can reach 200 μm. The insulating layer is formed by spraying insulating paint. The insulating thermal conductive layer plays an insulating protection effect to ensure electrical safety.

[0059] Optionally, the cooling structure 120 is configured as a water cooling plate or a metal heat sink or a battery tray.

[0060] Furthermore, in this embodiment, the cooling structure 120 is configured as a water cooling plate, because the water cooling plate can control the heat dissipation efficiency by the flow rate of the coolant, so the heat dissipation efficiency of the water cooling plate is fast, which can increase the heat dissipation efficiency of the cooling structure 120. Of course, the utility model is not limited to this, and in other embodiments, the cooling structure 120 can also be configured as a metal heat dissipation plate or a battery tray.

[0061] In one embodiment, the battery tray is a battery tray without a water channel. Specifically, the material of the battery tray is selected to have good thermal conductivity, such as but not limited to aluminum, copper, etc. The battery tray relies on its own material properties to dissipate heat.

[0062] In the second embodiment, the battery tray is a battery tray with water channels, so that the material of the battery tray and the internal water channels can be used for heat dissipation, thereby improving space utilization, reducing overall costs, and further increasing the heat dissipation efficiency of the cooling structure 120.

[0063] The utility model also proposes a car, which includes a high-voltage distribution box and a battery pack assembly. The specific structure of the high-voltage distribution box and the battery pack assembly refers to the above-mentioned embodiment. Since the car adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0064] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An assembly of a high-voltage distribution box and a battery pack, characterized in that: include: A battery pack, the battery pack comprising a battery module and a cooling structure for heat exchange with the battery module; and A high voltage distribution box is also heat exchanged with the cooling structure.

2. The assembly of a high-voltage distribution box and a battery pack according to claim 1, characterized in that: The battery pack further comprises a battery box, the battery module is arranged in the battery box, and the cooling structure constitutes at least a part of the box wall of the battery box.

3. The assembly of a high-voltage distribution box and a battery pack according to claim 2, characterized in that: The high-voltage distribution box is also arranged in the battery box; The cooling structure constitutes the bottom wall of the battery box, or the cooling structure is arranged on the bottom wall of the battery box.

4. The assembly of a high-voltage distribution box and a battery pack according to claim 1, characterized in that: The high-voltage distribution box includes a contactor and a conductor connected to the contactor, and a thermal pad is provided between the conductor and the cooling structure.

5. The assembly of a high-voltage distribution box and a battery pack according to claim 4, characterized in that: The conductor part includes a contact portion and a recessed portion connected to each other, the contact portion has a contact plane, the contact plane is in contact with the thermal pad, the recessed portion is recessed compared to the contact plane, the fixing member passes through the bottom wall of the recessed portion to be connected to the contactor, and the head of the fixing member is accommodated in the recessed portion.

6. The assembly of a high-voltage distribution box and a battery pack according to claim 5, characterized in that: The contactor is provided with an insulating baffle located in the recessed portion and used for isolating two electrodes, and the insulating baffle is lower than the contact plane.

7. The assembly of a high-voltage distribution box and a battery pack according to claim 4, characterized in that: The conductor member and the housing of the high-voltage distribution box are integrally injection-molded.

8. The assembly of a high-voltage distribution box and a battery pack as claimed in claim 3, characterized in that: A sealing member is provided between the edge of the shell of the high-voltage distribution box and the cooling structure.

9. The assembly of a high-voltage distribution box and a battery pack according to claim 1, characterized in that: An insulating heat-conducting layer is provided on the side where the cooling structure and the high-voltage distribution box perform heat exchange.

10. The assembly of a high-voltage distribution box and a battery pack according to any one of claims 1 to 9, characterized in that: The cooling structure is configured as a water cooling plate or a metal heat sink or a battery tray.

11. A car, characterized in that: An assembly comprising a high-voltage distribution box and a battery pack as described in any one of claims 1 to 10.

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