High-voltage box and energy storage system

Abstract

The utility model discloses a high-voltage box and an energy storage system, the high-voltage box comprises a box body, a battery management system and an electrical module are detachably installed in the box body, the battery management system and the electrical module are adjacently arranged and connected, the electrical module comprises a substrate and a plurality of electrical elements, the substrate is provided with a plurality of installation areas, and the installation areas are arranged on the substrate. Each installation area is provided with an electrical element, the substrate is further provided with an adapter, the adapter is provided with a plurality of interfaces, and the interfaces are used for being connected with the electrical elements and an external battery system. According to the utility model, the electrical elements are integrated on the substrate to form a whole body and are detachably installed in the box body, and rapid connection with other parts is realized through the adapter, so that the electrical module can be rapidly installed and disassembled and is convenient to maintain, the electrical elements can be divided in the installation area, the electrical elements are reasonably arranged, and the installation efficiency is improved. And wiring is also facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to a high-voltage box and an energy storage system. Background Art

[0002] The high-voltage box of the energy storage system is mainly used to control the connection or disconnection of the main electrical circuit of the battery system, realize pre-charging, charging and discharging according to demand, and monitor the status of the battery system voltage, current, switches, contactors, etc. in real time. However, the high-voltage box of the prior art has a battery management system and multiple electrical components installed inside. The battery management system and each electrical component are connected through a wiring harness or copper bus. However, due to the lack of effective division of the internal area of ​​the high-voltage box and the lack of modular design, the electrical components in the high-voltage box are arranged in a mess. A large number of wiring harnesses or devices need to be removed during later maintenance, which is cumbersome to operate and inconvenient to repair. Utility Model Content

[0003] One purpose of the embodiments of the present utility model is to provide a high-voltage box which adopts a modular design, can be quickly disassembled, and is easy to maintain.

[0004] Another purpose of the embodiments of the present utility model is to provide an energy storage system that is simple to install and disassemble and convenient to maintain.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] In a first aspect, a high-voltage box is provided, comprising a box body, in which a battery management system and an electrical module are detachably installed, the battery management system and the electrical module are adjacently arranged and connected, the electrical module comprises a substrate and a plurality of electrical components, the substrate having a plurality of mounting areas, the electrical components being mounted in the mounting areas, an adapter connected to the battery management system is also arranged on the substrate, the adapter is provided with a plurality of interfaces, and the interfaces are used to connect to the electrical components and an external battery system.

[0007] As a preferred solution for the high-voltage box, a mounting groove is provided in each of the mounting areas, and one of the electrical components is provided in each of the mounting grooves.

[0008] As a preferred solution for the high-voltage box, the substrate is provided with a material reduction groove, the material reduction groove is spaced apart from the installation groove, the material reduction groove is provided with a fixing piece, each of the electrical components is connected by a connecting piece, and the connecting piece is clamped to the fixing piece.

[0009] As a preferred solution of the high-voltage box, the base plate is further provided with a liquid cooling plate and a heat conducting member, the liquid cooling plate is arranged on the side of the base plate away from the electrical component, and the heat conducting member is respectively connected to the electrical component and the liquid cooling plate.

[0010] As a preferred solution for the high-voltage box, the heat-conducting component includes a heat-conducting plate and an insulating heat-conducting adhesive. The heat-conducting plate is arranged between the liquid cooling plate and the substrate, the mounting groove passes through the substrate, and the insulating heat-conducting adhesive is filled between the electrical component and the groove wall of the mounting groove and is connected to the heat-conducting plate.

[0011] As a preferred solution for the high-voltage box, a side depression of the substrate facing the heat-conducting component is provided with a glue overflow groove connected to the mounting groove, and the heat-conducting plate is sealed at a notch of the glue overflow groove.

[0012] As a preferred solution of the high-pressure box, a heat insulating member is provided on a side of the liquid cooling plate facing away from the base plate, and the heat insulating member is provided between the box body and the liquid cooling plate.

[0013] As a preferred solution of the high-voltage box, the electrical components include a shunt, a first fuse, a second fuse, a first high-voltage contactor, and a second high-voltage contactor. The control circuit includes a positive circuit and a negative circuit. The shunt, the first fuse, and the first high-voltage contactor are sequentially connected to form a negative circuit. The second fuse and the second high-voltage contactor are sequentially connected to form a positive circuit. The negative circuit is used to connect the negative electrode of the battery system, and the positive circuit is used to connect the positive electrode of the battery system.

[0014] The electrical component further includes a balancing relay and a balancing resistor. The balancing relay and the balancing resistor are connected to form a balancing loop. The balancing loop is connected in parallel with the positive pole loop.

[0015] As a preferred solution for the high-voltage box, temperature sensors are provided at positions of the substrate adjacent to the first fuse and the second fuse, and the temperature sensors are connected to the battery management system.

[0016] In a second aspect, an energy storage system is provided, comprising a battery system and the above-mentioned high-voltage box, wherein the battery system is connected to the high-voltage box.

[0017] The beneficial effects of the utility model are as follows: by integrating electrical components on the substrate to form a module and detachably installing it in the box, and realizing the quick plug-in of electrical components and external battery system and battery management system signals through the interface of the adapter, the electrical module can be quickly installed and disassembled, and the electrical module can be replaced as a whole. In addition, the substrate also divides the electrical components into multiple areas, and each electrical component can be positioned and installed. On the one hand, the electrical components can be arranged neatly and reasonably, which is conducive to the wiring and disconnection between the electrical components, thereby facilitating the replacement and maintenance of a single electrical component. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described in detail below based on the drawings and embodiments.

[0019] Figure 1 It is a partial schematic diagram of the high-voltage box described in the embodiment of the utility model.

[0020] Figure 2 This is an assembly exploded view of the electrical module described in the embodiment of the utility model.

[0021] Figure 3 It is a first stereoscopic schematic diagram of the substrate described in the embodiment of the utility model.

[0022] Figure 4 This is a second stereoscopic schematic diagram of the substrate described in the embodiment of the utility model.

[0023] In the figure:

[0024] 1. Box body; 11. Bottom plate;

[0025] 2. Electrical module; 21. Base plate; 211. Mounting groove; 212. Reduction groove; 213. Glue overflow groove; 22. Electrical component; 221. Shunt; 222. First fuse; 223. Second fuse; 224. First high-voltage contactor; 225. Second high-voltage contactor; 226. Balancing relay; 227. Balancing resistor; 228. Adapter; 23. Liquid cooling plate; 24. Heat conducting plate; 25. Heat insulating member; 26. Temperature sensor; 27. Fixing member; 28. Connecting member. DETAILED DESCRIPTION

[0026] In order to make the technical problems solved by the utility model, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the utility model will be further described in detail below in conjunction with the accompanying drawings. 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 those skilled in the art without creative work are within the scope of protection of the utility model.

[0027] 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.

[0028] Reference Figure 1 and Figure 2The utility model provides a high-voltage box, including a box body 1, in which a battery management system and an electrical module 2 are detachably installed, and the battery management system and the electrical module 2 are adjacently arranged and connected. Among them, the electrical module 2 includes a substrate 21 and a plurality of electrical components 22, the substrate 21 has a plurality of installation areas, and the upper surface of the substrate 21 is provided with a plurality of installation areas, and the installation areas are installed with electrical components 22 (in this embodiment, each installation area is installed with electrical components 22, and in other embodiments, some installation areas may also be installed with electrical components 22, and some installation areas are used as spare areas, and the spare areas are used to install other components without installing the electrical components 22), and the substrate 21 is also provided with an adapter 228 connected to the battery management system signal, and the adapter 228 can be a terminal block, and the adapter 228 is provided with interfaces, and the interfaces are respectively used to connect with the electrical components 22 and the external battery system. This design integrates the electrical components 22 on the substrate 21 to form the electrical module 2, and connects the electrical components 22 and the external battery system to the battery management system signals respectively through the adapter 228, so that the battery management system can monitor the electrical components 22 and the external battery system in real time, and control the power on and off of the electrical components 22 and the external battery system for protection. This design integrates the electrical components 22 on the substrate 21 to form the electrical module 2, and realizes the rapid connection of the electrical components 22 and the external battery system with the battery management system signals through the interface of the adapter 228, which is conducive to the installation and disassembly of the electrical module 2 and the replacement of the electrical module 2. In addition, the substrate 21 also divides the electrical components 22 into multiple areas, which can locate and install each electrical component 22. On the one hand, it can make the electrical components 22 arranged neatly and reasonably, which is conducive to the wiring and disconnection between the electrical components 22, thereby facilitating the replacement and maintenance of a single electrical component 22.

[0029] For example, refer to Figure 1 The electrical component 22 includes a shunt 221, a first fuse 222, a second fuse 223, a first high-voltage contactor 224, and a second high-voltage contactor 225. The control circuit includes a positive circuit and a negative circuit. The negative circuit is connected to the negative terminal of the high-voltage box side wall, and the negative terminal is used to connect to the negative electrode of the external battery system. The shunt 221, the first fuse 222 and the first high-voltage contactor 224 are connected in sequence to form a negative circuit. The second fuse 223 and the second high-voltage contactor 225 are connected in sequence to form a positive circuit. The positive circuit is connected to the positive terminal of the high-voltage box side wall, and the positive terminal is used to connect to the positive electrode of the external battery system to realize the electrical connection between the electrical module 2 and the external battery system.

[0030] Furthermore, the electrical component 22 also includes a balancing relay 226 and a balancing resistor 227, and the balancing relay 226 and the balancing resistor 227 are connected to form a balancing circuit, and the balancing circuit is connected in parallel with the positive circuit. Exemplarily, the balancing circuit is connected in parallel with the second high-voltage contactor 225. During the charging and discharging process of the battery system, due to the differences between different single cells, it is easy to cause imbalance problems, which seriously affects the performance and service life of the battery system. By setting up a balancing circuit, the single cells with higher voltage can be discharged by discharging the balancing resistor 227, and the electricity is released in the form of heat, so as to gain more charging time for other single cells, thereby balancing the entire battery system.

[0031] Since the first fuse 222, the second fuse 223 and the equalizing resistor 227 generate a lot of heat during normal use, further, the substrate 21 is provided with temperature sensors 26 at positions adjacent to the first fuse 222, the second fuse 223 and the equalizing resistor 227. The temperature sensor 26 may be a thermistor, and the temperature sensor 26 is connected to the battery management system. The temperature sensor 26 can monitor the temperature changes of the surrounding environment of the first fuse 222, the second fuse 223 and the equalizing resistor 227, and transmit the temperature changes to the battery management system, so that the battery management system can control the start and stop of the electrical module 2 according to the collected temperature changes.

[0032] Specifically, refer to Figure 1 In order to more clearly illustrate the connection method between the electrical component 22 and the adapter 228, Figure 1 The bold dashed line in the figure indicates the wiring path of the electrical component 22 and the adapter 228. Among them, the temperature sensor 26, the first fuse 222, the second fuse 223, the first high-voltage contactor 224, the second high-voltage contactor 225 and the external battery system can be plugged into the interface of the adapter 228 through the signal line, so that the battery management system can receive feedback signals from the temperature sensor 26, the first fuse 222, the second fuse 223, the first high-voltage contactor 224, the second high-voltage contactor 225 and the external battery system through the adapter 228 and send control signals to them.

[0033] Optionally, first connection holes are arranged at intervals around the substrate 21, and fixing nuts are welded to the bottom plate 11 of the box body 1. Fasteners pass through the first connection holes and are connected to the nuts to lock the substrate 21 in the box body 1, thereby realizing the detachable installation of the electrical module 2 in the box body 1.

[0034] Specifically, the substrate 21 is made of an insulating thermally conductive material, which may be plastic, alumina ceramics, etc., to prevent short circuits between the electrical components 22. Exemplarily, the substrate 21 is integrally formed by plastic injection molding.

[0035] In an alternative embodiment, referring to Figures 2 to 4 Each installation area is provided with an installation slot 211, and an electrical component 22 is provided in each installation slot 211. The installation slot 211 can insulate and separate the electrical components 22 to avoid circuits between the electrical components 22 or to provide good insulation for the electrical components 22.

[0036] Of course, in other optional embodiments, the upper surface of the substrate 21 is provided with a plurality of positioning marks (such as engraved lines), and the marks divide the mounting surface of the substrate 21 into a plurality of mounting areas. This design can form mounting areas on the substrate 21 by engraved lines without increasing the thickness of the substrate 21, so as to reduce the volume of the electrical module 2 and improve the space utilization of the box 1.

[0037] Further, refer to Figure 3 The substrate 21 is provided with a material reduction groove 212, and the material reduction groove 212 is spaced apart from the mounting groove 211. By providing the material reduction groove 212, on the one hand, the material used for the substrate 21 can be reduced to reduce the cost, and on the other hand, the weight of the substrate 21 can be reduced, which is beneficial to reducing the overall weight of the high-voltage box.

[0038] In addition, as described in the above scheme, when the substrate 21 is formed by plastic injection molding and has a plurality of mounting grooves 211, if the groove wall thickness of the mounting groove 211 is too large, during injection molding, the outer surface of the groove wall of the mounting groove 211 cools faster, while the center of the groove wall of the mounting groove 211 cools slower. Therefore, as cooling proceeds, the plastic in the center of the groove wall of the mounting groove 211 shrinks and expands toward the outer surface, causing insufficient filling in the center, thereby generating vacuum bubbles. This design, by providing a material reduction groove 212, is conducive to reducing the groove wall thickness of the mounting groove 211, thereby reducing the occurrence of vacuum bubbles during the injection molding of the substrate 21, improving the injection molding quality, and reducing the manufacturing difficulty.

[0039] Optionally, the material reduction groove 212 is provided with a fixing member 27, and each electrical component 22 is connected by a connecting member 28, and the connecting member 28 includes but is not limited to a copper bus, a wiring harness, etc., and the connecting member 28 is clamped to the fixing member 27. Exemplarily, the fixing member 27 can be a wiring harness buckle, and the connecting member 28 can be a wiring harness. The wiring harness buckle can be clamped to limit the wiring harness to prevent the wiring harness from moving during vibration, causing friction between the connecting member 28 and the outer wall of the electrical component 22 or even damage.

[0040] Specifically, in this embodiment, the electrical components 22 are connected at high voltage via copper busbars, and the electrical components 22 are connected at low voltage and via wiring harnesses.

[0041] Since the electrical element 22 generates a lot of heat when it is working, Figure 2The base plate 21 is also provided with a liquid cooling plate 23 and a heat conducting member. The liquid cooling plate 23 is provided on the side of the base plate 21 away from the electrical component 22. In this embodiment, the liquid cooling plate 23 is provided on the lower surface of the base plate 21, and the heat conducting member is connected to the electrical component 22 and the liquid cooling plate 23, respectively. The heat conducting member can quickly transfer the heat generated by the electrical component 22 to the liquid cooling plate 23, and quickly dissipate the heat through the liquid cooling plate 23, thereby preventing the heat from accumulating in the box body 1, which helps to increase the service life of the electrical component 22 and ensure the stability and reliability of the high-voltage box.

[0042] Exemplarily, the heat conducting member includes a heat conducting plate 24 and an insulating heat conducting adhesive. The heat conducting plate 24 may be a metal heat conducting plate 24. The heat conducting plate 24 is disposed between the liquid cooling plate 23 and the substrate 21 and is sealed in the notch of the mounting groove 211 close to the liquid cooling plate 23. The mounting groove 211 penetrates the substrate 21. The electrical component 22 is spaced apart from the groove wall of the mounting groove 211. The insulating heat conducting adhesive is filled between the electrical component 22 and the groove wall of the mounting groove 211 and is connected to the heat conducting plate 24. The heat generated by the electrical component 22 can be first transferred to the heat conducting plate 24 through the insulating heat conducting adhesive, and then quickly transferred to the liquid cooling plate 23 through the heat conducting plate 24. The insulating heat conducting adhesive of this design can not only provide good insulation protection for the electrical component 22, but also stabilize the electrical component 22 in the mounting groove 211 and transfer the heat generated by the electrical component 22. However, since the thermal conductivity of the insulating thermal conductive glue is low, the thermal conductivity effect is poor, while the thermal conductivity of the heat conductive plate 24 is high, the thermal conductivity effect is good, which helps to improve the overall heat transfer efficiency, thereby improving the cooling effect inside the box 1. In addition, the heat conductive plate 24 can also block the notch of the installation groove 211 adjacent to the liquid cooling plate 23, so that overflow of glue can be prevented when pouring the insulating thermal conductive glue.

[0043] Furthermore, combined with Figure 4 The substrate 21 is recessed on the side of the heat conducting member and is provided with an overflowing glue groove 213 connected with the mounting groove 211, and the heat conducting plate 24 is blocked at the notch of the overflowing glue groove 213. When pouring the insulating heat conducting glue, part of the insulating heat conducting glue can overflow into the overflowing glue groove 213 to increase the contact area between the insulating heat conducting glue and the heat conducting plate 24, which is beneficial to further improve the heat transfer efficiency.

[0044] Preferably, continue to refer to Figure 2 A heat insulator 25 is provided on the side of the liquid cooling plate 23 facing away from the base plate 21, and the heat insulator 25 is provided between the box body 1 and the liquid cooling plate 23. The heat insulator 25 can prevent the heat outside the box body 1 from being transferred to the liquid cooling plate 23, thereby avoiding reducing the cooling effect of the liquid cooling plate 23.

[0045] The utility model also provides an energy storage system, comprising a battery system and a high-voltage box as described in any of the above embodiments, wherein the battery system is connected to the high-voltage box. The energy storage system of the utility model adopts a modular design, is easy to install and disassemble, and is convenient to maintain.

[0046] In the description of this article, it should be understood that the terms "upper", "lower", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship 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 orientation, be constructed and operated in a specific orientation, 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.

[0047] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0048] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0049] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A high-voltage box, characterized in that: It includes a box body, in which a battery management system and an electrical module are detachably installed. The battery management system and the electrical module are adjacently arranged and connected. The electrical module includes a substrate and a plurality of electrical components. The substrate has a plurality of mounting areas, in which the electrical components are mounted. An adapter connected to the battery management system is also provided on the substrate. The adapter is provided with a plurality of interfaces, which are respectively used to connect to the electrical components and external battery system signals.

2. The high-voltage box according to claim 1, characterized in that: Each of the installation areas is provided with an installation slot, and each of the installation slots is provided with one of the electrical components.

3. The high-voltage box according to claim 2, characterized in that: The substrate is provided with a material reduction groove, the material reduction groove is spaced apart from the mounting groove, the material reduction groove is provided with a fixing piece, each of the electrical components is connected via a connecting piece, and the connecting piece is clamped on the fixing piece.

4. The high-voltage box according to any one of claims 2 to 3, characterized in that: The base plate is further provided with a liquid cooling plate and a heat conducting member. The liquid cooling plate is arranged on the side of the base plate away from the electrical component. The heat conducting member is connected to the electrical component and the liquid cooling plate respectively.

5. The high-voltage box according to claim 4, characterized in that: The heat-conducting member includes a heat-conducting plate and an insulating heat-conducting adhesive. The heat-conducting plate is arranged between the liquid cooling plate and the substrate. The mounting groove passes through the substrate. The insulating heat-conducting adhesive is filled between the electrical component and the groove wall of the mounting groove and is connected to the heat-conducting plate.

6. The high-voltage box according to claim 5, characterized in that: The side of the substrate facing the heat conducting member is recessed to be provided with a glue overflow groove communicated with the mounting groove, and the heat conducting plate is sealed at the notch of the glue overflow groove.

7. The high-voltage box according to claim 4, characterized in that: A heat insulating member is arranged on a side of the liquid cooling plate away from the base plate, and the heat insulating member is arranged between the box body and the liquid cooling plate.

8. The high-voltage box according to any one of claims 1 to 3, characterized in that: The electrical element includes a shunt, a first fuse, a second fuse, a first high-voltage contactor, and a second high-voltage contactor. The control circuit includes a positive circuit and a negative circuit. The shunt, the first fuse, and the first high-voltage contactor are sequentially connected to form a negative circuit. The second fuse and the second high-voltage contactor are sequentially connected to form a positive circuit. The negative circuit is used to connect the negative electrode of the battery system, and the positive circuit is used to connect the positive electrode of the battery system. The electrical component further includes a balancing relay and a balancing resistor. The balancing relay and the balancing resistor are connected to form a balancing loop. The balancing loop is connected in parallel with the positive pole loop.

9. The high-voltage box according to claim 8, characterized in that: Temperature sensors are disposed at positions of the substrate adjacent to the first fuse and the second fuse, and the temperature sensors are connected to the battery management system.

10. An energy storage system, characterized in that: It comprises a battery system and the high-voltage box according to any one of claims 1 to 9, wherein the battery system is connected to the high-voltage box.

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