High-voltage control box, battery and electric equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a high-voltage control box, a battery and electric equipment. The high-voltage control box comprises a box body, a liquid cooling plate, a BMS, a mounting base and a control loop, the liquid cooling plate and the BMS are both mounted on the inner bottom wall of the box body, the mounting base is mounted on the liquid cooling plate in an attached mode and provided with a limiting groove in a penetrating mode in the height direction, at least a heating part of the control loop is mounted in the limiting groove in a clamped mode, and the position, located below the heating part, in the limiting groove is filled with heat-conducting glue. The battery and the electric equipment comprise the high-voltage control box, the heat of the heating component in the control loop is transmitted to the liquid cooling plate through the heat-conducting glue, the heat dissipation efficiency of the high-voltage control box is improved, the temperature rise in the box body is effectively reduced, and the safety of the high-voltage control box is improved. The liquid cooling plate is arranged in the box body, so that the high-voltage control box independently realizes a liquid cooling heat dissipation function and does not need to share a set of heat dissipation system with the battery pack, and the flexible arrangement of the high-voltage control box is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a high-voltage control box, a battery and electrical equipment. Background Art

[0002] In the high-voltage battery system, the high-voltage control box includes the battery management system (BMS), control circuit, and some low-voltage or high-voltage wiring harnesses and other accessories to achieve control of the battery pack charging and discharging process.

[0003] At present, the high-voltage control box usually shares a liquid cooling system with the battery pack, that is, the high-voltage control box and the battery pack are both installed on the liquid cooling box, and the heat generated by the high-power components in the control circuit is transferred to the liquid cooling box through the box body to achieve liquid cooling. Since the box body of the high-voltage control box is mostly an injection molded part, the heat transfer efficiency is low and it has a high protection level of IP56, which makes it easy for heat to accumulate in the box body, which not only affects the normal use of various components in the box body, but also poses a safety hazard when the temperature rises too high. In addition, since the high-voltage control box needs to be installed on the liquid cooling box, the installation position of the high-voltage control box is limited, which limits the internal structural layout of the battery. Utility Model Content

[0004] The utility model aims to provide a high-voltage control box, a battery and an electrical device, so as to improve the heat dissipation effect and safety of the high-voltage control box, reduce the temperature rise, and realize the flexible arrangement of the high-voltage control box.

[0005] To achieve this purpose, the technical solution adopted by the utility model is:

[0006] A high-voltage control box comprises a box body, a liquid cooling plate, a BMS, a mounting seat and a control circuit. The liquid cooling plate and the BMS are both mounted on the inner bottom wall of the box body. The mounting seat is fitted on the liquid cooling plate and is provided with a limiting groove penetrating along the height direction. At least the heat-generating component of the control circuit is snap-fitted and mounted in the limiting groove. The limiting groove is filled with thermal conductive adhesive below the heat-generating component.

[0007] As a preferred solution, an elastic thermal pad is sandwiched between the mounting seat and the liquid cooling plate.

[0008] As a preferred solution, the mounting seat is threadedly connected to the liquid cooling plate and clamps the thermal pad.

[0009] As a preferred solution, the mounting seat includes a main body plate and a sealing plate, the main body plate is provided with the limiting groove along the height direction, and the sealing plate is attached to the bottom surface of the main body plate and blocks the bottom opening of the limiting groove.

[0010] As a preferred solution, the sealing plate is an aluminum plate.

[0011] As a preferred solution, the liquid cooling plate is provided with a first hole, the inner bottom wall of the box body is correspondingly provided with a second hole, and the first hole is threadedly connected with the second hole.

[0012] As a preferred solution, the inner bottom wall of the box body is provided with a groove, the liquid cooling plate is clamped in the groove, and the inner bottom wall of the groove is provided with the second hole.

[0013] As a preferred embodiment, the liquid cooling plate is provided with a water inlet pipe and a water outlet pipe connected to the internal liquid cooling channel, and the front side plate of the box body is provided with a water inlet and a water outlet, the water inlet pipe is connected to the water inlet, and the water outlet pipe is connected to the water outlet.

[0014] A battery comprising the above-mentioned high voltage control box.

[0015] Electrical equipment, including the above-mentioned battery.

[0016] The beneficial effects of the utility model are:

[0017] The high-voltage control box proposed in the utility model includes a box body, a liquid cooling plate, a BMS, a mounting seat and a control circuit. The liquid cooling plate and the BMS are both mounted on the inner bottom wall of the box body. The mounting seat is fitted on the liquid cooling plate and is provided with a limiting groove penetrating along the height direction. At least the heat-generating component of the control circuit is snap-fitted and mounted in the limiting groove. The limiting groove is filled with thermal conductive adhesive below the heat-generating component. The heat of the heat-generating component is transferred to the liquid cooling plate through the thermal conductive adhesive, which reduces the heat transfer path, improves the heat dissipation efficiency of the high-voltage control box, can effectively reduce the temperature rise in the box body, ensures the stable operation of each component in the box body, and improves the safety of the high-voltage control box. By installing the liquid cooling plate in the box body, the high-voltage control box independently realizes the liquid cooling heat dissipation function, does not need to share the heat dissipation system with the battery pack, and realizes the flexible arrangement of the high-voltage control box.

[0018] The battery and electrical equipment provided by the utility model include the above-mentioned high-voltage control box, which improves the heat dissipation efficiency and safety of the high-voltage control box. At the same time, the high-voltage control box independently realizes the liquid cooling function, and realizes the flexible arrangement of the high-voltage control box. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a high-voltage control box provided by an embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of a mounting base provided by an embodiment of the utility model;

[0021] Figure 3 It is a schematic diagram of the assembly structure of the liquid cooling plate and the thermal pad provided in an embodiment of the utility model.

[0022] The names and numbers of the components in the figure are as follows:

[0023] 1. Box body; 11. Groove; 12. Front side panel; 121. Water inlet; 122. Water outlet; 2. Liquid cooling plate; 21. Water inlet pipe; 22. Water outlet pipe; 3. BMS; 4. Mounting seat; 40. Limiting groove; 41. Main plate; 42. Sealing plate; 5. Control circuit; 51. Positive fuse; 52. Positive relay; 53. Negative fuse; 54. Negative relay; 55. Main circuit switch; 56. Shunt; 57. Pre-charge relay; 58. Pre-charge resistor; 59. Intermediate relay; 6. Thermal pad. DETAILED DESCRIPTION

[0024] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0025] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0028] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0029] This embodiment provides a battery, which includes a battery pack and a high-voltage control box. The high-voltage control box is used to control the charging and discharging process of the battery pack.

[0030] The existing high-voltage control box usually shares a liquid cooling system with the battery pack, that is, the high-voltage control box and the battery pack are both installed on the liquid cooling box, and the heat generated by the high-power components in the box is transferred to the liquid cooling box through the box body to achieve liquid cooling. Since the box body of the high-voltage control box is mostly an injection molded part, the heat transfer efficiency is low and it has a high protection level of IP56, which makes it easy for heat to accumulate in the box body, which not only affects the normal use of various components in the box body, but also poses a safety hazard when the temperature rises too high. In addition, since the high-voltage control box needs to be installed on the liquid cooling box, the installation position of the high-voltage control box is limited, which limits the internal structural layout of the battery.

[0031] To solve the above problems, Figure 1 As shown, this embodiment also proposes a high-voltage control box, which includes a box body 1, a liquid cooling plate 2, a BMS 3, a mounting seat 4 and a control circuit 5. The liquid cooling plate 2 and the BMS 3 are both mounted on the inner bottom wall of the box body 1. The mounting seat 4 is fitted on the liquid cooling plate 2 and is provided with a limiting groove 40 in the height direction. At least the heat-generating component of the control circuit 5 is mounted in the limiting groove 40, and the limiting groove 40 is filled with thermal conductive glue below the heat-generating component. The heat of the heat-generating component in the control circuit 5 is transferred to the liquid cooling plate 2 through the thermal conductive glue, which reduces the heat transfer path, improves the heat dissipation efficiency of the high-voltage control box, can effectively reduce the temperature rise in the box body 1, ensures the stable operation of each component in the box body 1, and improves the safety of the high-voltage control box. By installing the liquid cooling plate 2 in the box body 1, the high-voltage control box independently realizes the liquid cooling heat dissipation function, does not need to share the heat dissipation system with the battery pack, and realizes the flexible arrangement of the high-voltage control box.

[0032] Specifically, the box body 1 includes a lower box body and a box cover, wherein the lower box body is formed by bending and welding sheet metal, thereby improving the structural strength of the lower box body. The opening at the top of the lower box body has a flange formed by vertically bending inward, and a sealing gasket is provided between the box cover and the flange to improve the sealing of the box body 1 and achieve an IP65 protection grade. The mounting seat 4 is integrally formed by injection molding, thereby reducing the processing difficulty and cost of the mounting seat 4. Of course, the mounting seat 4 can also be prepared by other processing methods.

[0033] like Figure 1 As shown, the control loop 5 includes a positive circuit, a negative circuit and a main circuit switch 55, the main circuit switch 55 includes a positive switch and a negative switch, the positive circuit includes a positive input terminal, a positive fuse 51, a positive relay 52, a positive switch and a positive output terminal connected in series with a copper bar, and the negative circuit includes a negative input terminal, a negative fuse 53, a negative relay 54, a negative switch and a negative output terminal connected in series with a copper bar. In addition, the control loop 5 also includes a shunt 56, a pre-filling relay 57, a pre-filling resistor 58 and an intermediate relay 59. Among them, the copper bar, the positive fuse 51, the positive relay 52, the negative fuse 53, the negative relay 54, the shunt 56, the pre-filling relay 57 and the pre-filling resistor 58 are all heating components (components with relatively large power), and need to be cooled to ensure the safe operation of the control loop 5. Since the control loop 5 of the high-voltage control box is a prior art, the specific composition and working principle of the control loop 5 are not repeated.

[0034] In this embodiment, a first hole is provided on the liquid cooling plate 2, and a second hole is correspondingly provided on the inner bottom wall of the box body 1, and the first hole is threadedly connected to the second hole. The liquid cooling plate 2 is threadedly connected to the inner bottom wall of the box body 1, so that the liquid cooling plate 2 can be detachably installed in the box body 1, which is convenient for disassembly, assembly and maintenance of the liquid cooling plate 2.

[0035] Furthermore, a groove 11 is provided on the inner bottom wall of the box body 1, and the liquid cooling plate 2 is snapped into the groove 11, and a second hole is provided on the inner bottom wall of the groove 11. The groove 11 serves to limit the installation of the liquid cooling plate 2, thereby limiting the positional deviation of the liquid cooling plate 2 and improving the stability of the installation of the liquid cooling plate 2. The groove 11 can also serve as a guide for the installation of the liquid cooling plate 2, so that the first hole of the groove 11 is quickly aligned with the second hole, thereby improving the installation efficiency of the liquid cooling plate 2. The liquid cooling plate 2 of this embodiment is a square plate, and the four corners of the liquid cooling plate 2 are provided with a first hole, and four second holes are correspondingly provided on the inner bottom wall of the groove 11. In other embodiments, the number and arrangement positions of the first holes and the second holes can also be flexibly adjusted according to installation requirements, which are not specifically limited here.

[0036] It should be noted that since the main circuit switch 55 and the BMS 3 do not need to be cooled, and both are installed on one side of the liquid cooling plate 2, the BMS 3 can be kept as far away as possible from the high-power components on the mounting base 4, which is conducive to eliminating electromagnetic interference to the BMS 3. In addition, the size of the copper busbar can be appropriately increased to further improve the heat dissipation effect.

[0037] Specifically, Figure 1 As shown, the liquid cooling plate 2 is provided with a water inlet pipe 21 and a water outlet pipe 22 connected to the internal liquid cooling channel, and the front side plate 12 of the box body 1 is provided with a water inlet 121 and a water outlet 122, the water inlet pipe 21 is connected to the water inlet 121, and the water outlet pipe 22 is connected to the water outlet 122. The external cooling water processor is respectively connected to the water inlet 121 and the water outlet 122 of the front side plate 12 of the box body 1, so that the cooling water flows into the liquid cooling channel inside the liquid cooling plate 2 through the water inlet 121 and the water inlet pipe 21, and after cooling the heat-generating components on the mounting seat 4, the cooling water with increased temperature flows into the water outlet pipe 22 and flows back to the cooling water processor through the water outlet 122 for cooling, so as to realize the circulation of cooling water. By arranging the water inlet 121 and the water outlet 122 on the same side plate (front side plate 12) of the box body 1, a compact arrangement of the pipelines between the cooling water processor and the box body 1 is achieved, and the installation space occupied by the high-pressure control box is reduced.

[0038] like Figure 1 and Figure 2 As shown, a plurality of limit slots 40 are provided on the mounting base 4, and the copper busbar, the positive fuse 51, the positive relay 52, the negative fuse 53, the negative relay 54, the shunt 56, the pre-charge relay 57 and the pre-charge resistor 58 are respectively embedded and installed in the corresponding limit slots 40, so as to realize the reliable installation of the heat generating components on the mounting base 4. After the installation of each heat generating component is completed, the thermal conductive glue is poured from the bottom opening of the limit slot 40, so that the heat of each heat generating component can be quickly transferred to the liquid cooling plate 2 through the thermal conductive glue.

[0039] Specifically, the mounting base 4 includes a main body plate 41 and a sealing plate 42. The main body plate 41 is provided with a limiting groove 40 in the height direction. The sealing plate 42 is fitted on the bottom surface of the main body plate 41 and blocks the bottom opening of the limiting groove 40. The thermally conductive glue poured into the limiting groove 40 is a thermally conductive gel, and the bottom opening of the limiting groove 40 is sealed with a sealing plate 42 to prevent the thermally conductive gel from overflowing from the limiting groove 40. The sealing plate 42 is completely fitted with the liquid cooling plate 2. To increase the contact area with the liquid cooling plate 2, thereby improving the heat transfer efficiency. The sealing plate 42 of this embodiment is an aluminum plate, which has the characteristics of light weight and high thermal conductivity, and is convenient for quickly transferring the heat of the heat-generating components to the liquid cooling plate 2. In other embodiments, the sealing plate 42 can also be other heat-conducting plates such as copper plates, which are not specifically limited here.

[0040] The mounting base 4 of this embodiment is threadedly connected to the liquid cooling plate 2, making the assembly operation of the mounting base 4 and the liquid cooling plate 2 simple and easy, improving the connection strength and disassembly efficiency of the mounting base 4 and the liquid cooling plate 2, and facilitating the replacement and maintenance of the mounting base 4 and the liquid cooling plate 2.

[0041] Furthermore, if Figure 2 and Figure 3 As shown, an elastic thermal pad 6 is sandwiched between the mounting base 4 and the liquid cooling plate 2. Specifically, the mounting base 4 and the liquid cooling plate 2 can clamp the thermal pad 6 when they are threadedly connected, and the sealing plate 42 fits tightly with the thermal pad 6. The thermal pad 6 can fill the gap between the sealing plate 42 and the liquid cooling plate 2 to avoid a gap between the sealing plate 42 and the liquid cooling plate 2, thereby improving the heat transfer efficiency. At the same time, the thermal pad 6 can also separate the sealing plate 42 from the liquid cooling plate 2 to avoid damage to the liquid cooling plate 2 caused by the sealing plate 42, thereby improving the protection of the liquid cooling plate 2. The thermal pad 6 of this embodiment is a thermally conductive silicone pad, which has good thermal conductivity and good elasticity, and is relatively low in cost.

[0042] This embodiment also proposes an electric device, which includes an electric main body and the above-mentioned battery, and the battery is used to supply power to the electric main body. By using the above-mentioned battery, the heat dissipation efficiency and safety of the high-voltage control box of the battery in the electric device are improved. At the same time, the high-voltage control box independently realizes the liquid cooling function, and realizes the flexible arrangement of the high-voltage control box. The electric main body of this embodiment can be a new energy vehicle, an energy storage device, a charging station, etc., which is not specifically limited here.

[0043] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. High voltage control box, characterized in that, The invention comprises a box body (1), a liquid cooling plate (2), a BMS (3), a mounting seat (4) and a control circuit (5); the liquid cooling plate (2) and the BMS (3) are both mounted on the inner bottom wall of the box body (1); the mounting seat (4) is fitted on the liquid cooling plate (2) and is provided with a limiting groove (40) penetrating along the height direction; at least a heat generating component of the control circuit (5) is snap-fitted and mounted in the limiting groove (40); and the limiting groove (40) is filled with heat conductive glue below the heat generating component.

2. The high voltage control box according to claim 1, characterized in that: An elastic heat-conducting pad (6) is sandwiched between the mounting seat (4) and the liquid cooling plate (2).

3. The high voltage control box according to claim 2, characterized in that: The mounting seat (4) is threadedly connected to the liquid cooling plate (2) and clamps the thermal pad (6).

4. The high voltage control box according to claim 2, characterized in that: The mounting seat (4) comprises a main body plate (41) and a sealing plate (42); the main body plate (41) is provided with the limiting groove (40) penetrating along the height direction; the sealing plate (42) is arranged in close contact with the bottom surface of the main body plate (41) and blocks the bottom opening of the limiting groove (40).

5. The high voltage control box according to claim 4, characterized in that: The sealing plate (42) is an aluminum plate.

6. The high voltage control box according to any one of claims 1 to 5, characterized in that: The liquid cooling plate (2) is provided with a first hole, and the inner bottom wall of the box body (1) is correspondingly provided with a second hole, and the first hole is threadedly connected to the second hole.

7. The high voltage control box according to claim 6, characterized in that: The inner bottom wall of the box body (1) is provided with a groove (11), the liquid cooling plate (2) is snap-fitted into the groove (11), and the inner bottom wall of the groove (11) is provided with the second hole.

8. The high voltage control box according to any one of claims 1 to 5, characterized in that: The liquid cooling plate (2) is provided with a water inlet pipe (21) and a water outlet pipe (22) which are in communication with the internal liquid cooling channel; the front side plate (111) of the box body (1) is provided with a water inlet (121) and a water outlet (122); the water inlet pipe (21) is in communication with the water inlet (121), and the water outlet pipe (22) is in communication with the water outlet (122).

9. A battery, characterized in that The invention comprises the high voltage control box according to any one of claims 1 to 8.

10. Electrical equipment, characterized in that: A battery comprising the battery of claim 9.

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