CN223067303U - Cluster control box and energy storage device for controlling battery cluster - Google Patents

Abstract

The embodiment of the present application provides a cluster control box and energy storage device for controlling a battery cluster, the cluster control box includes a shell, a switch assembly and a heat dissipation structure; the switch assembly is arranged in the shell, and an assembly port is arranged on the back plate; the heat dissipation structure includes a substrate, an inner frame and an inner fan; the substrate is arranged at the assembly port and is sealed with the assembly port, the inner frame includes a top wall and a bottom wall opposite to each other in the height direction of the cluster control box and a side wall between the top wall and the bottom wall, the side wall is arranged at intervals with the substrate, and the top wall and the bottom wall are fixed to the substrate at one end away from the side wall; the inner fan is arranged on the side of the back plate facing the inside of the shell, and is arranged with the inner frame in the width direction of the cluster control box. The present application satisfies the reasonable use of space of the cluster control box of a large-capacity, high-voltage and high-current energy storage system, solves the problem of insufficient heat dissipation capacity when only a spoiler fan is arranged inside the IP55+ protection level shell, and avoids the problem of liquid cooling and the problem of low reliability of the IP2X protection level shell.

Description

Cluster control box for controlling battery clusters and energy storage device

Technical Field

The application relates to the technical field of energy storage, in particular to a cluster control box for controlling a battery cluster and an energy storage device.

Background

The cluster control box is used for being connected between the battery cluster and PCS (power convers ion system) and used for controlling the charge and discharge of the battery cluster and guaranteeing the charge and discharge safety performance of the battery cluster. The switch assembly is arranged in the cluster control box and comprises a fuse, a contactor, an isolating switch and the like, and the switch assembly can generate heat in the working process, so that the heat generated by the switch assembly needs to be timely dissipated. In the related art, some cluster control boxes radiate heat in a straight-through air mode, an air inlet hole and an air outlet hole are respectively formed in a shell of each cluster control box, hot air in each cluster control box is blown out through a fan, cold air is sucked in, and heat radiation is achieved, however, the mode can lead to IP (I ngress Protect ion) low protection level, and invasion of external dust, moisture, insects and the like cannot be prevented. Some cluster control boxes are provided with a flow-around fan in the cluster control box so as to flow around the fan through the inside, and then heat is exchanged between the shell and the outside to realize heat dissipation. Therefore, a cluster control box with good heat dissipation efficiency and high IP protection level is needed.

Disclosure of utility model

The embodiment of the application provides a cluster control box and an energy storage device for controlling a battery cluster, wherein the cluster control box in the embodiment has high heat dissipation efficiency and high IP protection level.

In a first aspect, an embodiment of the present application provides a cluster control box for controlling a battery cluster, where the cluster control box includes a casing, a switch assembly and a heat dissipation structure, the switch assembly is disposed in the casing, the switch assembly is used for switching on or off a circuit between the battery cluster and a power converter, the battery cluster includes a plurality of battery packs connected in series or in parallel, the casing includes a front panel and a rear panel opposite to each other in a depth direction of the cluster control box, an assembly port is disposed on the rear panel, the heat dissipation structure includes a substrate, an inner frame body and an inner fan, the substrate is disposed at the assembly port and sealed with the assembly port, the inner frame body is disposed on a side of the substrate facing an inner cavity of the casing, the inner frame body includes a top wall and a bottom wall opposite in a height direction of the cluster control box, and a side wall between the top wall and the bottom wall is disposed at a distance from the substrate, one end of the top wall and the substrate are fixed, the inner fan is disposed on a side of the rear panel facing the casing, and is arranged with the inner frame body in a width direction of the cluster control box, and one of air outlet and air inlet of the inner fan faces the inner frame body, and the other air inlet is facing the casing.

In the embodiment, the inner fan and the inner frame body are arranged in the width direction of the cluster control box, one of the air outlet and the air inlet of the inner fan faces the inner frame body, and the other air outlet faces the shell, so that the inner fan flows air through the space between the inner frame body and the substrate along the width direction of the cluster control box, flows into the shell and circularly flows. The mode can improve the flow velocity of gas flowing through the substrate, and further improve the heat exchange efficiency between the gas and the substrate, thereby effectively improving the heat dissipation capacity of the heat dissipation structure. In addition, because the base plate sets up in assembly mouth department to seal with the assembly mouth, seal the inner chamber of casing and the casing outside through the base plate and isolate, thereby can effectively improve the IP protection level of cluster control box, can effectually avoid invasion of external dust, moisture, insect etc.. In summary, the cluster control box in this embodiment not only can effectively improve the heat dissipation efficiency of the heating element such as the switch component in the housing, but also can obtain a higher IP protection level. In addition, because the assembly port is positioned on the back plate, the heat radiation structure is arranged on the back plate, the length of the lead can be reduced, the switch component and the like are arranged as close to the front panel as possible, the design principle that the switch component and the like are close to the front panel is facilitated, and the overall layout is more reasonable.

In a first embodiment based on the first aspect, the heat dissipating structure further includes a plurality of heat dissipating fins located in the housing, and the plurality of heat dissipating fins located in the housing are located on the surface of the substrate and are arranged between the top wall and the bottom wall at intervals along the height direction of the cluster control box. In this embodiment, the plurality of outer heat dissipating fins may be in full contact with the gas between the inner frame body and the substrate, so as to improve heat exchange efficiency with the gas flow between the inner frame body and the substrate, so as to finally improve the heat dissipating effect of the heat dissipating structure.

In a second embodiment based on the first embodiment, the top wall and the bottom wall of the inner frame body are heat dissipating fins located on the surface of the substrate, the side wall of the inner frame body covers the plurality of heat dissipating fins, the top wall and the bottom wall in the depth direction of the cluster control box, and the side wall of the inner frame body is fixed with the top wall and the bottom wall. In this embodiment, since the side wall of the inner frame body covers the plurality of heat dissipating fins, the top wall and the bottom wall of the inner frame body in the depth direction of the cluster control box, the heat dissipating fins can be located in the space between the side wall of the inner frame body and the substrate, so as to improve the structural rationality of the inner heat conducting assembly.

In a third embodiment based on any of the above embodiments, the space formed by the inner frame body and the base plate communicates with a tuyere of the inner fan toward the inner frame body. In this embodiment, the space formed by the inner frame body and the substrate may be in direct contact communication with the air inlet of the inner fan facing the inner frame body, or may be in communication with the air inlet of the inner fan with a gap.

In a fourth embodiment based on any of the above embodiments, an air inlet of the inner fan faces the inner frame, the inner fan and the switch assembly are arranged in a depth direction of the cluster control box, and an air outlet of the inner fan faces the switch assembly. In this embodiment, under the action of the inner fan, the gas with higher temperature in the housing can enter the space formed by the inner frame body and the substrate, then heat exchange is performed between the gas and the substrate, the gas is cooled effectively when reaching the air outlet of the space formed by the inner frame body and the substrate, then the gas with low temperature enters the inner fan through the air inlet of the inner fan, and then is blown to the inner cavity of the housing through the air outlet of the inner fan, so as to cool and dissipate heat of heating elements such as a switch component in the inner cavity of the housing effectively. The air outlet of the inner fan faces the switch assembly, so that the cooled low-temperature air in the space formed by the inner frame body and the substrate can be directly blown to the switch assembly, and the heat dissipation efficiency of the switch assembly can be improved

In a fifth embodiment based on the fourth embodiment, the space formed by the inner frame body and the base plate is communicated with the air inlet of the inner fan.

In a sixth embodiment based on any of the foregoing embodiments, the heat dissipation structure further includes an outer frame body and an outer fan, the outer frame body is located at a side of the substrate facing the outside of the housing, the outer frame body includes top walls and bottom walls opposite to each other in a height direction of the cluster control box and side walls located between the top walls and the bottom walls of the outer frame body, the side walls of the outer frame body are spaced from the substrate, one ends of the top walls and the bottom walls of the outer frame body, which are far from the side walls, are fixed to the substrate, the outer fan is located at a side of the rear back plate facing the outside of the housing and is arranged with the outer frame body in a width direction of the cluster control box, and an air outlet of the outer fan faces the outer frame body. In this embodiment, the flow velocity of the gas flowing through the substrate can be improved by the external fan, so as to improve the heat exchange efficiency between the gas and the substrate, thereby effectively improving the heat dissipation capability of the heat dissipation structure. In addition, because the air outlet of the outer fan is communicated with the air inlet of the space formed by the outer frame body and the substrate, the outer fan can suck the air outside the space formed by the outer frame body and the substrate into the space formed by the outer frame body and the substrate, and then the air flows out from the air outlet of the space formed by the outer frame body and the substrate to form circulating air, so that the cold air outside the cluster control box can be sucked into the space formed by the outer frame body and the substrate through the outer fan, and the air in the space formed by the outer frame body and the substrate can be conveniently subjected to heat exchange, so that the heat exchange efficiency is improved.

In a seventh embodiment based on the sixth embodiment, the space formed by the inner frame body and the substrate is communicated with the air inlet of the inner fan, the air outlet of the inner fan faces the switch assembly, the space formed by the outer frame body and the substrate is communicated with the air outlet of the outer fan, and the air inlet of the outer fan faces away from the back plate. In this embodiment, the flow velocity of the gas flowing through the substrate inside the housing toward the surface inside the housing can be improved by the inner fan, so that the heat exchange efficiency between the gas inside the housing and the substrate is improved, the flow velocity of the gas flowing through the substrate outside the housing toward the surface outside the housing can be improved by the outer fan, so that the heat exchange efficiency between the gas outside the housing and the substrate is improved, and the heat exchange efficiency of the substrate to the gas inside the housing and the gas outside the housing is effectively improved, so that the heat dissipation capacity of the heat dissipation structure is effectively improved.

In an eighth embodiment based on any one of the sixth and seventh embodiments, the inner fan and the outer fan are arranged in a depth direction of the cluster control box, and the inner frame body and the outer frame body are arranged in a depth direction of the cluster control box. In this embodiment, since the inner frame body and the outer frame body are arranged in the depth direction of the cluster control box, it is ensured that the gas flowing through the space formed by the inner frame body and the substrate and the gas flowing through the space formed by the outer frame body and the substrate can exchange heat more effectively through the substrate, so as to improve the heat dissipation efficiency.

The ninth embodiment based on any one of the sixth, seventh and eighth embodiments, wherein the heat dissipating structure further includes a plurality of heat dissipating fins located outside the housing, and the plurality of heat dissipating fins located outside the housing are located on the surface of the substrate and are arranged between the top wall of the outer frame and the bottom wall of the outer frame at intervals along the height direction of the cluster control box. In this embodiment, the plurality of external heat dissipation fins may be fully contacted with the gas in the external air duct, so as to improve the heat exchange efficiency with the gas in the external air duct, and finally improve the heat dissipation effect of the heat dissipation structure on the heat generating components such as the switch assembly in the housing.

In a tenth embodiment based on any of the above embodiments, the switch assembly includes a disconnecting switch and a fuse, and the disconnecting switch, the fuse, and the internal fan are arranged along a depth direction of the cluster control box. In this embodiment, the heat generated by the fuse and the isolating switch is relatively large, so that the internal fan faces the fuse and the isolating switch, and the fuse and the isolating switch can be subject to focused heat dissipation, thereby improving the balance of overall heat dissipation of the switch assembly.

In an eleventh embodiment based on any of the above embodiments, the switch assembly further includes a leakage current sensor, the leakage current sensor and the isolating switch being stacked in a height direction of the cluster control box. In this embodiment, the leakage current sensor and the isolating switch are stacked in the height direction of the cluster control box, so that the space of the cluster control box in the height direction can be effectively utilized, and the space of the cluster control box in the width direction or the depth direction is saved, so that the cluster control box is miniaturized.

In a twelfth embodiment based on any of the embodiments above, the switch assembly further includes a shunt, the shunt and the isolating switch being stacked in a height direction of the cluster control box. In this embodiment, the splitter and the isolating switch are stacked in the height direction of the cluster control box, so that the space of the cluster control box in the height direction is effectively utilized, and the cluster control box is miniaturized.

In a thirteenth embodiment based on any of the foregoing embodiments, the cluster control box further includes an input interface, an output interface, and an input wire and an output wire, the input interface and the output interface are disposed on the front panel, the input wire or the output wire extends along a depth direction of the cluster control box, the switch assembly is disposed in an extending direction, the input wire is used for connecting the input interface and the switch assembly, the output wire is used for connecting the output interface and the switch assembly, and the switch assembly is used for disconnecting a line between the input interface and the output interface, and the output wire and the switch assembly are stacked in a height direction of the cluster control box. In this embodiment, the output wire and the switch assembly are stacked. And further, the space of the cluster control box in the height direction is effectively utilized, so that the cluster control box is miniaturized.

In a fourteenth embodiment based on any of the above embodiments, the cluster control box further includes a circuit board and a battery cluster control unit, the battery cluster control unit is configured to collect information of the battery pack, the circuit board and the switch assembly are arranged along a width direction of the cluster control box, and the battery cluster control unit and the circuit board are stacked in a height direction of the cluster control box. In this embodiment, since the circuit board belongs to the weak current device and each component of the switch assembly belongs to the strong current device, the switch assembly and the circuit board are distributed in the width direction of the cluster control box, so that the strong current device and the weak current device can be arranged in the dividing area, which is favorable for reducing the influence of the strong current device on the weak current device. Meanwhile, as each part of the switch assembly belongs to a high-current device, the heat productivity is large, and the switch assembly and the circuit board are distributed in the width direction of the cluster control box, so that the key heat dissipation of the switch assembly by the heat dissipation structure is facilitated. The battery cluster control unit and the circuit board are stacked in the height direction of the cluster control box. And the space of the cluster control box in the height direction, namely the space above the circuit board, is effectively utilized, so that the cluster control box is miniaturized.

In a fifteenth embodiment based on any of the above embodiments, the battery cluster control unit is arranged with the switch assembly in the width direction of the cluster control box. Because the battery cluster control unit also belongs to the weak current device, the battery cluster control unit and the switch assembly are arranged in a dividing area, thereby being beneficial to reducing the influence of the strong current device on the battery cluster control unit.

In a sixteenth embodiment based on any of the previous embodiments, the outer thermally conductive member includes a plurality of outer heat dissipating fins connected to the base plate, the plurality of outer heat dissipating fins, the plurality of inner heat dissipating fins, and the base plate are integrally formed. In this embodiment, the plurality of external heat dissipation fins can fully contact with the gas in the external air duct, so that the heat exchange efficiency between the external heat conduction member and the gas in the external air duct is improved, and the heat dissipation effect of the heat dissipation structure on the heating members such as the switch assembly in the shell is finally improved. Because a plurality of outer radiating fins, a plurality of inner radiating fins and base plate integrated into one piece set up to can effectively improve the heat exchange efficiency of interior heat conduction spare and outer heat conduction spare.

In a second aspect, the present application provides an energy storage device, where the energy storage device includes a case, one or more battery clusters located in the case, and one or more cluster control boxes in any of the foregoing embodiments, each battery cluster corresponds to one cluster control box, an electrical input interface of the cluster control box is used for electrically connecting with a battery cluster, and an output interface of the cluster control box is used for electrically connecting with a power converter.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

Fig. 1 is a schematic structural diagram of an energy storage device according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a cluster control box with a hidden top wall according to an embodiment of the present application;

FIG. 3 is a schematic diagram illustrating the working principle of the heat dissipation structure of the cluster control box in the embodiment of FIG. 2;

FIG. 4 is a schematic view of the cluster control box of FIG. 2 after concealing the heat dissipating structure;

FIG. 5 is a schematic view of a portion of the heat dissipating structure in the embodiment of FIG. 2;

FIG. 6 is an exploded view of FIG. 5;

FIG. 7 is a schematic view of the cluster control box in the embodiment of FIG. 2 after the top-level electronics are hidden;

fig. 8 is a front view of the cluster control cartridge in the embodiment of fig. 2.

Reference numerals illustrate:

The depth direction of the cluster control box, the height direction of the cluster control box, the width direction of the cluster control box and the Z;

1. The power control system comprises an energy storage device, a cabinet body, a battery cluster, a battery pack, a cluster control box, a power converter, a PCS converter, a DCDC converter and a power converter, wherein the energy storage device, the cabinet body, the battery cluster, the battery pack, the cluster control box, the power converter, the PCS converter and the DCDC converter are respectively arranged in sequence;

10. The shell, 11, the bottom wall, 13, the side wall, 131, the front panel, 132, the back panel, 1321 and the assembly port;

21. Input interface, 211, positive input interface, 212, negative input interface, 22, output interface, 221, positive output interface, 222, negative output interface, 23, weak current interface;

30. The switch assembly, 31, a fuse, 32, a contactor, 33, a leakage current sensor, 34, a shunt, 35, an isolating switch, 351 and a knob;

41. input wires 411, positive input wires 412, negative input wires 42, output wires 421, positive output wires 422, negative output wires;

51. 52, a battery cluster control unit;

60. The heat dissipation structure comprises a heat dissipation structure, 61, a substrate, 62, an inner heat conduction assembly, 620, an inner air duct, 621, an inner frame body, 6211, a top wall, 6212, a bottom wall, 6213, a side wall, 622, an inner fan, 623, an inner heat conduction member, 6231, heat dissipation fins, 63, an outer heat conduction assembly, 630, an outer air duct, 631, an outer frame body, 6311, a top wall, 6312, a bottom wall, 6313, a side wall, 632, an outer fan, 633, an outer heat conduction member, 6331 and heat dissipation fins.

Detailed Description

In order to facilitate understanding of the energy storage device provided by the embodiment of the present application, an application scenario thereof will be described below. The energy storage device is a system capable of storing electric energy through a certain medium and releasing the stored energy to generate electricity when needed, and can be used as a load balancing device and a standby power supply to be applied to scenes such as industrial and commercial parks, large-scale ground power supply stations or light storage systems. The application of the energy storage device will be briefly described by taking the light storage system scenario as an example. Photovoltaic modules, energy storage converters, energy storage devices, and grid-tie inverters may be generally included in the photovoltaic storage system. The grid-connected inverter can convert the electric energy in the form of direct current into the electric energy in the form of alternating current and transmit the electric energy in the form of alternating current to a power grid, so that grid connection of the optical storage system is realized. The energy storage device can store a part of the electric energy output by the photovoltaic inverter when the electric energy generated by the photovoltaic assembly exceeds the electric energy demand of the power grid, and can output the stored electric energy to the power grid when the electric energy output by the photovoltaic assembly cannot meet the electric energy demand of the power grid so as to provide a more stable direct current source for the power grid. The energy storage converter can convert the power grid voltage into the power supply voltage of the energy storage device, or convert the voltage stored by the energy storage device into the power grid voltage and output the power grid voltage to the power grid.

In addition, according to the different requirements of the application scene of the energy storage device on the electricity consumption, the energy storage device can be further divided into a cabinet-level energy storage device and a container-level energy storage device.

In the energy storage device in the related art, functional devices such as a battery cluster control unit (Battery Control Unit, BCU) and the like are arranged at a certain position in the electrical bin, so that not only is the energy storage device not well protected, but also the space of the electrical bin is occupied, and the space utilization efficiency of the energy storage device is affected. In order to facilitate understanding of the energy storage device provided by the embodiment of the application, the specific structure thereof is described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an energy storage device 1 according to an embodiment of the present application.

Referring to fig. 1, the energy storage device 1 includes a cabinet body 2, the cabinet body 2 includes a battery compartment and an electrical compartment, the battery compartment and the electrical compartment are arranged in a stacked manner along a height direction of the cabinet body 2, and the electrical compartment is located below the battery compartment.

The energy storage device 1 further comprises a battery cluster 3 arranged in the battery compartment, wherein the battery cluster 3 comprises a plurality of battery packs 4 which are arranged in a stacked mode, a cluster control box 5 and a power converter 6 which are arranged in the electric compartment.

In some embodiments, the power converter 6 comprises PCS (power convers ion system) a converter, and the cluster control box 5 is connected between the PCS converter 7 and the battery cluster 3, so designed that the dc power of the battery cluster 3 can be converted into ac power by the PCS converter 7 to supply power to an external load. In addition, when the current between the battery cluster 3 and the PCS converter 7 is too large, the PCS converter 7 and the battery cluster 3 can be disconnected in time through the cluster control box 5, so that accidents such as fire disasters and the like caused by the battery cluster 3 or external loads can be prevented.

In some embodiments, when the voltage output by the battery cluster 3 is lower than the rated voltage, in order to ensure the stability of the output voltage of the energy storage device 1, the power converter 6 further includes a DC/DC (d i direct current/d i direct current) converter, the DCDC converter 8 is connected between the PCS converter 7 and the cluster control box 5, the cluster control box 5 is connected between the DCDC converter 8 and the battery cluster 3, and the voltage output by the battery cluster 3 is boosted or reduced by the DCDC converter 8, so as to ensure that the voltage delivered to the PCS converter 7 remains stable, so as to ensure the stability of the output voltage of the energy storage device 1. And when the current between the battery cluster 3 and the PCS converter 7 is overlarge, the current between the PCS converter 7 and the battery cluster 3 can be disconnected in time through the cluster control box 5, so that accidents such as fire disasters and the like caused by the battery cluster 3 or external loads can be prevented.

It can be understood that the cluster control box 5 and the battery cluster 3 in this embodiment are connected by wires, and based on reasonable wiring requirements, the pipelines on the liquid cooling side and the wires connected with the battery cluster 3 are respectively arranged at two ends of the cabinet body 2, so as to avoid wiring difficulty and wiring risk caused by mutual interference.

Fig. 2 is a schematic diagram of a structure of a cluster control box 5 with a hidden top wall according to an embodiment of the present application, and the cluster control box 5 in the embodiment of fig. 2 may be used in the energy storage device 1 in the figure, but also in other energy storage apparatuses.

Referring to fig. 2, the cluster control box 5 includes a housing 10, and a heat dissipation structure and some heat generating components disposed in the housing 10, wherein the heat generating components may include a switch assembly 30, an input wire 41, an output wire 42, a circuit board 51, a battery cluster control unit 52, and the like, and the heat dissipation structure 60 in the present embodiment is used for timely exchanging heat of heat generated by the heat generating components in the housing 10 with the outside of the cluster control box 5 to realize heat dissipation. In addition, the heat dissipation structure 60 in this embodiment has a higher IP protection level on the basis of being capable of effectively dissipating heat of the heat generating components in the cluster control box 5, and can effectively avoid invasion of external dust, moisture, insects and the like.

In some embodiments, the housing 10 includes a bottom wall 11, a top wall, and a plurality of side walls 13 connecting the top and bottom walls 11, the plurality of side walls 13 including a front panel 131 and a rear panel 132, the front panel 131 and the rear panel 132 being disposed opposite to each other in the depth direction X of the cluster control box 5. The bottom wall 11 and the top wall are disposed opposite to each other in the height direction Z of the cluster control box 5.

Fig. 3 is a schematic diagram illustrating an operating principle of the heat dissipation structure 60 of the cluster control box 5 in the embodiment of fig. 2, and fig. 4 is a schematic diagram illustrating a structure of the cluster control box 5 in the embodiment of fig. 2 after the heat dissipation structure 60 is hidden. The dashed lines with arrows in fig. 3 represent the circulation trace of the gas.

In order to effectively improve the IP protection level of the cluster control box 5 on the basis of achieving effective heat dissipation for the heat generating components in the cluster control box 5, referring to fig. 3 and 4, in some embodiments, an assembly port 1321 is provided on the rear panel 132 of the housing 10, and the assembly port 1321 is used for installing the heat dissipation structure 60. In the present embodiment, the mounting opening 1321 is formed in the rear panel 132, because the front panel 131 is provided with various external interfaces (such as the input interface 21 and the output interface 22, which will be described later), in order to reduce the length of the wires, the switch assembly 30 is usually disposed as close to the front panel 131 as possible, so that the heat dissipation structure 60 is disposed in the rear panel 132, which can make the overall layout more reasonable, and is beneficial to the design principle of the switch assembly 30 that is close to the front panel 131.

To ensure tightness of the cluster control box 5, in some embodiments, a heat dissipating structure 60 is disposed at the fitting port 1321 and sealed from the fitting port 1321 to be able to seal the inner cavity of the housing 10 from the outside of the housing 10. Therefore, the cluster control box 5 in the embodiment can achieve a higher IP protection level, and can effectively avoid invasion of external dust, moisture, insects and the like.

In order to ensure tightness of the heat dissipation structure and the assembly port after assembly, in some embodiments, the heat dissipation structure 60 includes a substrate 61, where the substrate 61 is disposed at the assembly port 1321 and is sealed with the assembly port 1321, that is, the substrate 61 is mounted at the assembly port 1321 to seal and cover the assembly port 1321, for example, a sealing gasket may be disposed between an edge of the substrate 61 and the assembly port 1321 to ensure tightness between the substrate 61 and the assembly port 1321, so that an inner cavity of the housing 10 is sealed and isolated from an outside of the housing 10 by the substrate 61, so that the cluster control box 5 in this embodiment can achieve a higher IP protection level, and can effectively avoid invasion of external dust, moisture, insects, and the like.

The high IP protection level of the cluster control box 5 is achieved through the substrate 61, in order to ensure the heat dissipation effect of the heat dissipation structure 60 on the heat generating component at the same time, in some embodiments, the heat dissipation structure 60 further includes an inner heat conduction component 62 and an outer heat conduction component 63 located at opposite sides of the substrate 61, wherein the inner heat conduction component 62 is located in the housing 10, the outer heat conduction component 63 is located outside the housing 10, the inner heat conduction component 62 and the outer heat conduction component 63 are not directly communicated through the substrate 61, the inner heat conduction component 62 and the outer heat conduction component 63 can perform heat exchange through the substrate 61, that is, the substrate 61 improves the heat exchange capability thereof through the inner heat conduction component 62 and the outer heat conduction component 63, and the inner heat conduction component 62 is connected to one side of the substrate 61 facing the inner cavity of the housing 10. The outer heat conducting member 633 is connected to a side of the substrate 61 facing the outside of the housing 10, and since the inner heat conducting assembly 62 and the outer heat conducting assembly 63 can exchange heat through the substrate 61, the inner heat conducting assembly 62 can exchange heat in the housing 10 with the outer heat conducting member 633 and further heat, so that the purpose of heat dissipation of the heating element such as the switch assembly 30 in the housing 10 can be achieved.

In summary, the cluster control box 5 in this embodiment can achieve a higher IP protection level and also obtain a better heat dissipation effect, so as to meet the heat dissipation requirements of the switch components 30 and the like in the cluster control box 5.

In order to improve the heat dissipation capability of the inner heat conduction assembly 62 to the heat generating body in the casing 10, referring to fig. 2 and 3, in some embodiments, the inner heat conduction assembly 62 includes an inner frame body 621 and an inner fan 622, the inner frame body 621 is located at a side of the base plate 61 facing the inner cavity of the casing 10, that is, the inner frame body 621 is disposed inside the casing 10, the inner frame body 621 is fixed to the base plate 61 and is at least partially spaced from the base plate 61, the space between the inner frame body 621 and the base plate 61 is set as an inner air duct 620, and the inner frame body 621 further includes two openings opposite to each other, and the two openings are respectively communicated with the inner air duct. The inner fan 622 is disposed at the opening of the inner frame body 621, so that rapid exchange between the air in the inner duct 620 formed by the substrate 61 and the inner frame body 621 and the air in the housing 10 can be achieved through the inner fan 622, thereby effectively improving the heat exchange capacity of the substrate 61 to improve the heat dissipation capacity of the heat dissipation structure 60.

In some embodiments, the inner frame 621 includes top and bottom walls 6211 and 6212 opposite in the height direction Z of the cluster control box 5 and side walls 6213 between the top and bottom walls 6211 and 6212, i.e., the top and bottom walls 6211 and 6212 are disposed in parallel and spaced apart relationship, and the top and bottom walls 6211 and 6212 and the side walls 6213 may be disposed vertically, i.e., the side walls 6213 and the substrate 61 are disposed in parallel.

The side walls 6213 are spaced from the base 61, and one ends of the top wall 6211 and the bottom wall 6212 away from the side walls 6213 are fixed to the base 61, that is, the top wall 6211 and the bottom wall 6212 are located between the side walls 6213 and the base 61, for example, the side walls 6213 and the base 61 may be connected together through the top wall 6211 and the bottom wall 6212, and the inner air duct 620 is enclosed by the top wall 6211, the bottom wall 6212, the side walls 6213 and the base 61.

In order to rationalize the flow path of the gas, in some embodiments, the inner fan 622 is disposed on a side of the rear back plate 132 facing the inside of the case 10 and is arranged with the inner frame 621 in the width direction Y of the cluster control box 5, and one of the air outlet and the air inlet of the inner fan 622 faces the inner frame 621 and the other air inlet faces the inside of the case 10. That is, two openings of the inner frame 621 are located at two ends of the inner frame 621 in the width direction Y of the cluster control box 5, and the two openings are also two opposite air inlets of the inner air duct 620, one of which is an air inlet, the other of which is an air outlet, and the inner fan 622 is disposed at one of the openings, and the air outlet or the air inlet of the inner fan 622 is communicated with one of the openings. That is, the space formed by the inner frame 621 and the base plate 61 is communicated with the air inlet of the inner fan 622 facing the inner frame 621, it is understood that the space formed by the inner frame 621 and the base plate 61 is communicated with the air inlet of the inner fan 622 facing the inner frame 621, which may mean that the inner frame 621 and the air inlet of the inner fan 622 are in direct contact and communicated, or that a gap exists between the air inlet of the inner fan 622 and the inner frame 621, but still communicated. In this embodiment, since the inner fan 622 and the inner frame 621 are arranged in the width direction Y of the cluster control box 5, one of the air outlet and the air inlet of the inner fan 622 faces the inner frame 621, and the other air inlet faces the inside of the case 10, the inner fan 622 causes the air to flow through the space between the inner frame 621 and the substrate 61 in the width direction Y of the cluster control box 5, and then to flow into the case 10 and circulate. This way can increase the flow rate of the gas flowing through the substrate 61, thereby increasing the heat exchange efficiency between the gas and the substrate 61, and effectively increasing the heat dissipation capability of the heat dissipation structure 60.

In order to further improve the heat dissipation effect of the heat dissipation structure 60, referring to fig. 2 and 3, in some embodiments, the inner fan 622 is disposed at the air outlet of the inner air duct 620, that is, the air inlet of the inner fan 622 is communicated with the space formed by the inner frame 621 and the substrate 61, and because the air inlet of the inner fan 622 is communicated with the air outlet of the inner air duct 620, the inner fan 622 can blow the air of the inner air duct 620 to the inner cavity of the housing 10, so that under the action of the inner fan 622, the air with higher temperature in the housing 10 can enter the inner air duct 620 from the air inlet of the inner air duct 620, then exchanges heat with the outer heat conduction component 63 through the inner heat conduction component 623, and when the air reaches the air outlet of the inner air duct 620, the air is cooled effectively, and then the air with low temperature is blown to the inner cavity of the housing 10 through the inner fan 622, so as to cool the heat dissipation components such as the switch component 30 in the inner cavity of the housing 10 effectively. It is understood that the inner fan 622 may be a blower fan at this time.

It will be appreciated that in other embodiments, the inner fan 622 may be disposed at an air inlet of the inner air duct 620, and the inner fan 622 is an air suction type fan for sucking air in the inner cavity of the housing 10 into the inner air duct 620.

In some embodiments, inner thermally conductive assembly 62 further includes an inner thermally conductive member 623, inner thermally conductive member 623 being disposed on substrate 61 on a side facing the interior cavity of housing 10. When the inner fan 622 works, the air can quickly pass through the inner air duct 620 along the width direction Y of the cluster control box 5 and flow to the inner cavity of the shell 10 and then flow to the inner air duct 620, and the inner heat conducting element 623 is arranged in the inner air duct 620, so that the air can circularly flow in the inner air duct 620 and the inner cavity of the shell 10 through the arrangement of the inner fan 622, the heat in the inner cavity of the shell 10 can quickly enter the inner air duct 620, and the heat exchange efficiency of the inner heat conducting element 623 and the air can be improved through improving the flow rate of the air, so that the heat emitted by the switch assembly 30 and the like in the shell 10 can timely exchange heat with the inner heat conducting element 623 in the inner air duct 620. Moreover, since the inner heat conducting member 623 is located in the inner air duct 620, heat exchange with the air in the inner air duct 620 can be fully performed, so that heat exchange efficiency between the inner heat conducting member 623 and the outer heat conducting component 63 can be improved, and heat dissipation efficiency to heat generating components such as the switch component 30 in the housing 10 can be effectively improved by integrating the arrangement of the inner fan 622, the inner air duct 620 and the inner heat conducting member 623.

For the outer heat-conducting component 63, it is also necessary to arrange the outer heat-conducting component 63 reasonably so as to improve the heat dissipation capability of the heat dissipation structure 60. For example, in some embodiments, referring to fig. 2 and 3, the outer heat conducting assembly 63 includes an outer frame 631, an outer fan 632, and an outer heat conducting member 633, the outer frame 631 is located on a side of the substrate 61 facing the outside of the housing 10, the outer frame 631 and the substrate 61 enclose to form an outer air duct 630, that is, a space is formed between the outer frame 631 and the substrate 61. For convenience of description, a space between the outer frame 631 and the substrate 61 is set as an outer air duct 630, and the outer heat conductive member 633 is disposed outside the outer air duct 630 and coupled to the substrate 61. The outer fan 632 is disposed at the air opening of the outer air duct 630, specifically, the outer frame 631 also includes two opposite openings, the two openings are the air opening of the outer air duct 630, and the outer fan 632 is disposed at the air opening of the outer air duct 630, that is, the outer fan 632 is disposed at one of the openings of the outer frame 631. The outer heat conductive member 633 exchanges heat with the inner heat conductive member 623 through the substrate 61. In this embodiment, since the inner heat conducting member 623 and the outer heat conducting member 633 can exchange heat through the substrate 61, the heat of the inner heat conducting member 623 can be quickly exchanged with the outer heat conducting member 63, thereby improving the heat dissipation efficiency of the heat dissipation structure 60.

In some embodiments, the outer frame 631 includes top and bottom walls 6311 and 6312 opposite in the height direction Z of the cluster control box 5 and side walls 6313 between the top and bottom walls 6311 and 6312 of the outer frame 631, that is, the top and bottom walls 6311 and 6312 of the outer frame 631 are disposed in parallel and spaced apart, and may be disposed vertically between the top and bottom walls 6311 and 6312 and the side walls 6313 of the outer frame 631, that is, between the side walls 6313 of the outer frame 631 and the substrate 61.

The side walls 6313 of the outer frame 631 are spaced from the substrate 61, and one ends of the top wall 6311 and the bottom wall 6312 of the outer frame 631 away from the side walls 6313 are fixed to the substrate 61, that is, the top wall 6311 and the bottom wall 6312 of the outer frame 631 are located between the side walls 6313 and the substrate 61 of the outer frame 631, for example, the side walls 6313 and the substrate 61 of the outer frame 631 can be connected together through the top wall 6311 and the bottom wall 6312 of the outer frame 631, and the outer air duct 630 is enclosed by the substrate 61 and the top wall 6311, the bottom wall 6312 and the side walls 6313 of the outer frame 631.

In some embodiments, the outer fan 632 is disposed on a side of the rear plate 132 facing the outside of the housing 10 and is arranged with the outer frame 631 in the width direction Y of the cluster control box 5, and the air outlet of the outer fan 632 faces the outer frame 631. I.e., the outer fan 632 is disposed at the tuyere of the outer air duct 630. That is, two openings of the outer frame 631 are located at two ends of the outer frame 631 in the width direction Y of the cluster control box 5, and the two openings are also two opposite air inlets of the outer air duct 630, one of which is an air inlet, the other of which is an air outlet, and the outer fan 632 is disposed at one of the openings, so that the air outlet of the outer fan 632 is communicated with one of the openings. That is, the space formed between the outer frame 631 and the substrate 61 communicates with the air port of the outer fan 632 toward the outer frame 631. Thus, when the outer fan 632 works, the external air can quickly circulate to the outer air duct 630, and the outer heat conducting member 633 is arranged outside the outer air duct 630, so that the heat exchange efficiency between the outer heat conducting member 633 and the external air can be improved by improving the flow rate of the air, and the heat exchange efficiency with the inner heat conducting member 623 is further improved, so that the heat dissipation efficiency of the heating members such as the switch assembly 30 in the shell 10 is effectively improved. And this way can increase the flow rate of the gas flowing through the substrate 61, thereby increasing the heat exchange efficiency between the gas and the substrate 61, and effectively increasing the heat dissipation capability of the heat dissipation structure 60. In addition, since the air outlet of the outer fan 632 is communicated with the air inlet of the outer air duct 630, the outer fan 632 can suck the air outside the outer air duct 630 into the outer air duct 630, and then the air flows out from the air outlet of the outer air duct 630 to form circulating air, so that the cool air outside the cluster control box 5 can be sucked into the outer air duct 630 through the outer fan 632, and the heat exchange with the air in the outer air duct 630 is facilitated, so that the heat exchange efficiency is improved.

In some embodiments, the space formed by the outer frame 631 and the substrate 61 is communicated with the air outlet of the outer fan 632, and the air inlet of the outer fan 632 faces away from the rear panel 132. Thus, the flow rate of the gas outside the housing 10 flowing through the surface of the substrate 61 facing the outside of the housing 10 can be increased by the outer fan 632, thereby improving the heat exchange efficiency between the gas outside the housing 10 and the substrate 61, and effectively improving the heat dissipation capability of the heat dissipation structure 60.

In some embodiments, the inner air duct 620 and the outer air duct 630 are opposite to each other in the depth direction X of the cluster control box 5, that is, the inner frame 621 and the outer frame 631 are arranged in the depth direction X of the cluster control box 5, and the extending direction of the inner air duct 620 is consistent with the extending direction of the outer air duct 630. In this embodiment, the inner air duct 620 and the outer air duct 630 are opposite to each other in the depth direction X of the cluster control box 5, and the extending directions are identical, so that the air flowing through the inner air duct 620 and the air flowing through the outer air duct 630 can perform heat exchange more sufficiently, so as to improve the heat dissipation efficiency.

In some embodiments, the inner fan 622 and the outer fan 632 are opposite to each other in the depth direction X of the cluster control box 5, the inner fan 622 is a blower fan, the outer fan 632 is an induced draft fan, and the flow direction of the air in the inner air duct 620 is opposite to the flow direction of the air in the outer air duct 630. In this embodiment, the flow direction of the gas in the inner air duct 620 is opposite to the flow direction of the gas in the outer air duct 630, so that a larger heat transfer temperature difference is provided, and thus the heat exchange capability between the gas in the inner air duct 620 and the gas in the outer air duct 630 can be improved, so as to improve the heat dissipation efficiency.

It will be appreciated that in other embodiments, the direction of flow of the gas in the inner air duct 620 may be the same as the direction of flow of the gas in the outer air duct 630.

Fig. 5 is a schematic view of a portion of the heat dissipating structure 60 in the embodiment of fig. 2, and fig. 6 is an exploded schematic view of fig. 5.

Referring to fig. 5 and 6, in some embodiments, the inner heat conductive member 623 includes a plurality of heat dissipating fins 6231 located within the housing 10, the plurality of heat dissipating fins 6231 located within the housing 10 being located on the surface of the substrate 61. The plurality of inner heat radiating fins 6231 can be fully contacted with the gas in the inner air duct 620, so that the heat exchange efficiency between the inner heat radiating fins and the gas in the inner air duct 620 is improved, and the heat radiating effect of the heat radiating structure 60 on the heating element in the shell 10 is improved.

In some embodiments, the plurality of inner heat fins 6231 may be fixed to the base plate 61, for example, may be integrally formed with the base plate 61.

In some embodiments, the plurality of inner heat dissipation fins 6231 are arranged between the top wall 6211 and the bottom wall 6212 of the inner frame body 621 at intervals along the height direction Z of the cluster control box 5, that is, the extending direction of the inner heat dissipation fins 6231 is the width direction Y of the cluster control box 5, so that the air can flow in the inner air duct 620 along the extending direction of the inner heat dissipation fins 6231, that is, along the width direction Y of the cluster control box 5, so as to form a reasonable flow track.

In some embodiments, the top wall 6211 and the bottom wall 6212 of the inner frame 621 are heat dissipation fins 6231 located on the surface of the substrate 61, and the top wall 6211 and the bottom wall 6212 of the inner frame 621 can exchange heat with the air passing through the inner air duct 620 to increase the contact area with the air of the inner air duct 620, thereby improving the heat dissipation effect.

In some embodiments, the side wall 6213 of the inner frame 621 covers the plurality of heat dissipating fins 6231, the top wall 6211 and the bottom wall 6212 of the inner frame 621 in the depth direction X of the cluster control box 5, and the side wall 6213 of the inner frame 621 is fixed to the top wall 6211 and the bottom wall 6212 of the inner frame 621, for example, by fixing with screws, fixing with welding or fastening, or an integrated design. In the present embodiment, since the side walls 6213 of the inner frame body 621 cover the plurality of heat dissipation fins 6231, the top wall 6211 and the bottom wall 6212 of the inner frame body 621 in the depth direction X of the cluster control box 5, the heat dissipation fins 6231 can be located in the space between the side walls 6213 of the inner frame body 621 and the substrate 61, so as to improve the structural rationality of the inner heat conduction assembly 62.

Referring to fig. 5 and 6, in some embodiments, the outer heat conductive member 633 further includes a plurality of heat dissipating fins 6331 located outside the housing 10, and the plurality of heat dissipating fins 6331 located outside the housing 10 are located on the surface of the substrate 61. The plurality of outer heat dissipation fins 6331 can be fully contacted with the gas in the outer air duct 630, so as to improve the heat exchange efficiency with the gas in the outer air duct 630, and finally improve the heat dissipation effect of the heat dissipation structure 60 on the heating elements such as the switch assembly 30 in the shell 10.

In some embodiments, the plurality of outer heat dissipating fins 6331 are fixed to the base plate 61, such as may be integrally formed with the base plate 61.

In some embodiments, the plurality of outer heat dissipation fins 6331 are arranged at intervals along the height direction Z of the cluster control box 5, that is, the extending direction of the outer heat dissipation fins 6331 is the width direction Y of the cluster control box 5, so that the gas can flow in the outer air duct 630 along the extending direction of the outer heat dissipation fins 6331, that is, along the width direction Y of the cluster control box 5, so as to form a reasonable flow track.

In some embodiments, the side wall 6313 of the outer frame 631 covers the plurality of heat dissipating fins 6331 and the top wall 6311 and the bottom wall 6312 of the outer frame 631 in the depth direction X of the cluster control box 5, and the side wall 6313 of the outer frame 631 is fixed to the top wall 6311 and the bottom wall 6312 of the outer frame 631, for example, may be fixed by screws, may be fixed by welding or fastening, or may be of an integrated design. In the present embodiment, since the side wall 6313 of the outer frame 631 covers the plurality of heat dissipating fins 6331, the top wall 6311 and the bottom wall 6312 of the outer frame 631 in the depth direction X of the cluster control box 5, the heat dissipating fins 6331 can be located in the space between the side wall 6313 of the outer frame 631 and the substrate 61, so as to improve the structural rationality of the outer heat conducting assembly 63.

In some embodiments, the base plate 61 and the plurality of inner heat dissipating fins 6231 and the plurality of outer heat dissipating fins 6331 are integrally formed. To improve heat exchange capability between the plurality of inner heat radiating fins 6231 and the plurality of outer heat radiating fins 6331.

In some embodiments, the plurality of inner heat dissipation fins 6231 and the plurality of outer heat dissipation fins 6331 are arranged in a staggered manner in the depth direction X of the cluster control box 5, and are not directly corresponding to each other, so that the supporting strength of the substrate 61 on the plurality of inner heat dissipation fins 6231 and the plurality of outer heat dissipation fins 6331 can be improved, and the heat exchange efficiency of the plurality of inner heat dissipation fins 6231 and the plurality of outer heat dissipation fins 6331 can be also effectively improved.

It will be appreciated that in other embodiments, the inner heat conductive member 623 may also be a liquid cooled tube, a homogeneous plate, or other heat conductive and heat dissipating member.

It will be appreciated that in other embodiments, the outer heat conductive member 633 may be a liquid cooled tube, a homogenizing plate, or other components with better heat conductive and heat dissipation properties.

In order to further improve the heat dissipation effect of the heat dissipation structure 60 on the heat generating component, the positional relationship between the inner fan 622 and the heat generating component is also the direction of the key layout of the present application. Since the switch assembly 30 in the heat generating member generates a large amount of heat by a strong current, the present embodiment effectively dissipates heat to the switch assembly 30 by reasonably arranging the positional relationship between the inner fan 622 and the switch assembly 30. Referring to fig. 2 and 3, in some embodiments, the inner fans 622 and the switch assemblies 30 are arranged in the depth direction X of the cluster control box 5, that is, the inner fans 622 and the switch assemblies 30 are disposed opposite to each other in the depth direction X of the cluster control box 5, and the air outlets of the inner fans 622 face the switch assemblies 30 for blowing the air of the inner air duct 620 toward the switch assemblies 30. It is understood that the facing in this embodiment means substantially facing, that is, the projections of the inner fan 622 and the switch assembly 30 in the depth direction X of the cluster control box 5 are substantially in the same area. Since the air outlet of the inner fan 622 faces the switch assembly 30, the cooled low-temperature air in the inner air duct 620 can be directly blown to the switch assembly 30, and the heat dissipation efficiency of the switch assembly 30 can be improved.

Since the extending direction of the inner air duct 620 is the width direction Y of the cluster control box 5, the arrangement direction of the inner fan 622 and the inner air duct 620 is also the width direction Y of the cluster control box 5. The direction of the inner fan 622 facing the switch assembly 30 is the depth direction X of the cluster control box 5, so that under the action of the inner fan 622, the air flows from the position of the inner fan 622 to the front panel 131, and then flows along the front panel 131 and the side wall 13 to the air inlet of the inner air duct 620, thereby achieving the purpose of circulating along the inner air duct 620 and the inner cavity of the housing 10. By the design, the flow rate and the flow velocity of the gas flowing through the switch assembly 30 can be effectively improved, so that the heat dissipation capacity of the switch assembly 30 can be effectively improved.

Specifically, referring to fig. 2, the switch assembly 30 is connected between the input interface 21 and the output interface 22 provided in the case 10, the input interface 21 is connected to the battery pack 3, the output interface 22 is connected to the DCDC converter 8 or the PCS converter 7, and when the current between the battery pack 3 and the PCS converter 7 is excessive, the switch assembly 30 can be turned off to timely turn off the current between the PCS converter 7 and the battery pack 3, thereby preventing an accident such as a fire accident from occurring in the battery pack 3 or an external load. Thereby, the switch assembly 30 can play a role in protecting the energy storage device 1, and preventing the energy storage device 1 from an electrical fire.

In some embodiments, the switch assembly 30 includes a fuse 31, the fuse 31 being capable of enabling the switching assembly 30 to be powered down. For example, the fuse 31 may blow the melt with heat generated by itself when the branch current is greater than or equal to the current threshold, causing the branch to open. In this embodiment, when the current between the battery cluster 3 and the PCS converter 7 is too large, the fuse 31 may be turned off, so that the current between the PCS converter 7 and the battery cluster 3 may be turned off in time, so as to prevent the battery cluster 3 or an external load from having a fire accident. Thereby, the switch assembly 30 can play a role in protecting the energy storage device 1, and preventing the energy storage device 1 from an electrical fire.

It will be appreciated that the fuse 31 in this embodiment may also be replaced by a contactor 32. Of course, the fuse 31 and the contactor 32 may be provided in the cluster control box 5 of the present application.

In some embodiments, the switch assembly 30 may further include a leakage current sensor 33, where the leakage current sensor 33 is configured to detect whether a leakage current occurs in the circuit, and when the leakage current is greater and exceeds a threshold value, a signal can be fed back to a control module of the contactor 32 through the signal processing circuit to control the contactor 32 to be disconnected, so that the on-off of the contactor 32 can be actively controlled according to the detection information of the leakage current sensor 33, so as to realize active protection and improve safety performance. And the detection precision of the leakage current sensor 33 is high, the misjudgment rate is low, and the use safety of the energy storage device 1 can be effectively ensured.

In some embodiments, a circuit board 51 is further disposed in the cluster control box 5, and a signal processing circuit is integrated on the circuit board 51. The circuit board 51 is provided in the casing 10, and the leakage current sensor 33 detects whether or not the phase difference of the current flowing through the plurality of current conductors connected to the leakage current sensor 33 changes, and when the phase difference of the current flowing through the plurality of current conductors changes, an induction signal is generated and fed back to the signal processing circuit, and the magnitude of the leakage current is obtained by the signal processing circuit. Thus, whether leakage current occurs in the circuit can be detected.

It will be appreciated that other electrical components, such as a power module, which may be an ac power module or a dc power module, are also integrated on the circuit board 51, and the power module is configured to be connected to an external mains or uninterruptible power supply, and then power a portion of the devices in the cluster control box 5, such as the contactors 32 in the cluster control box 5, through the power module. It will be appreciated that when the energy storage device 1 is operating normally, power may be supplied to some devices in the cluster control box 5 through the battery cluster 3, and when the energy storage device 1 fails, power may be supplied to some devices in the cluster control box 5 through the mains or uninterruptible power supply as an emergency power supply.

It will be appreciated that in other embodiments, the leakage current sensor 33 of the previous example may be replaced by a current sensor to reduce the volume of the circuit board 51.

In some embodiments, the switch assembly 30 may further include a shunt 34, and the current level of the branch where the shunt 34 is located may be detected by the shunt 34. In this embodiment, a shunt 34 is provided on one of the live wire and the neutral wire for electrically connecting the leakage current sensor 33 and the contactor 32, so that the magnitude of the current flowing through the leakage current sensor 33 and the contactor 32 can be detected.

It will be appreciated that in other embodiments, the shunt 34 previously described may be replaced by a hall sensor.

In some embodiments, the switch assembly 30 may further include a disconnecting switch 35, where the disconnecting switch 35 is connected in series with the fuse 31 in the foregoing, and when the current that the battery cluster 3 delivers to the switch assembly 30 is too large, the disconnecting switch 35 or the fuse 31 may be turned off, so as to prevent an electrical accident from occurring on the battery cluster 3 or the user side, and the energy storage device 1 in this embodiment can effectively improve the safety performance when the battery cluster 3 outputs a large current or a small current. Moreover, through the setting of isolator 35, when repairing, only need break off isolator 35, the user can be safe maintain to can reduce user's fortune dimension cost. By the arrangement of the fuse 31, the energy storage device 1 can be passively disconnected, and the safety performance of the energy storage device is further improved.

In some embodiments, the isolating switch 35 includes an input end, an output end, a rotating shaft and a knob 351, the knob 351 is connected to the rotating shaft, the rotating shaft extends out of the housing 10 through the front panel 131, and the knob 351 is located outside the housing 10 to facilitate rotation.

In some embodiments, the isolation switch 35, the fuse 31, and the contactor 32 are connected in series in order. The input lead 41 is connected to the current input of the input interface 21 and the isolating switch 35, and the output lead 42 is connected to the output of the output interface 22 and the contactor 32. In this embodiment, since the current output from the battery cluster 3 passes through the isolating switch 35 first and then passes through the fuse 31 and the contactor 32, when the current output from the battery cluster 3 is too large and exceeds the threshold value, the isolating switch 35 is turned off, so that it is ensured that the current does not pass through the fuse 31, the contactor 32, and the like, and damage to the fuse 31 and the contactor 32 can be prevented.

It will be appreciated that in other embodiments, the positions of the fuse 31 and the contactor 32 may be reversed, such as with the disconnector 35, the contactor 32 and the fuse 31 being connected in series.

It will be appreciated that in some embodiments, the switch assembly 30 may include a fuse 31 and a contactor 32. In some embodiments, the switch assembly 30 may include a fuse 31, a contactor 32, and an isolation switch 35. In some embodiments, the switch assembly 30 may include a fuse 31, a contactor 32, and a leakage current sensor 33. In some embodiments, the switch assembly 30 may include a fuse 31, a contactor 32, a shunt 34, and a leakage current sensor 33. In some embodiments, the switch assembly 30 may include an isolation switch 35, a fuse 31, a contactor 32, a shunt 34, and a leakage current sensor 33. Of course, in other embodiments, the switch assembly 30 may include other circuit protection devices such as an ammeter, voltmeter, and the like.

It will be appreciated that the fuse 31, the contactor 32, the isolating switch 35, the shunt 34, and the leakage current sensor 33 may be connected by wires, such as a hard copper bar, or a soft copper bar or other conductive material.

In some embodiments, the air outlet of the inner fan 622 faces the fuse 31 and the isolating switch 35, and the heat generated by the fuse 31 and the isolating switch 35 is larger, so that the inner fan 622 faces the fuse 31 and the isolating switch 35, and the fuse 31 and the isolating switch 35 can be focused to dissipate heat, so that the balance of the overall heat dissipation of the switch assembly 30 is improved.

Referring to fig. 2, in some embodiments, the input interfaces 21 are used to connect the battery clusters 3, specifically, the number of the input interfaces 21 is at least two, wherein one input interface 21 is a positive input interface 211, and the other input interface 21 is a negative input interface 212.

The output interfaces 22 are used for connecting the DCDC converter 8 or the PCS converter 7 in the foregoing, specifically, the number of output interfaces 22 is at least two, wherein one output interface 22 is a positive output interface 221, and the other output interface 22 is a negative output interface 222.

In some embodiments, the input interface 21 and the output interface 22 are disposed on the front panel 131, so that after the cluster control box 5 is assembled into the cabinet 2, the input interface 21 and the output interface 22 are exposed to the outside, so as to facilitate connection with the power converter 6 and the battery cluster 3 through wires.

In some embodiments, cluster control box 5 further includes a switch assembly 30 within housing 10 and input and output conductors 41, 42 for connecting switch assembly 30 with input and output interfaces 21, 22.

In some embodiments, the input interface 21 is used to connect the wires connected to the battery cluster 3 via a connector, and the output interface 22 is used to connect the DCDC converter 8 or the PCS converter 7 described above via a connector.

The input wire 41 is a copper bar, and not only is the connection between the switch assembly 30 and the input interface 21 facilitated by the copper bar, but also the copper bar has good conductivity, so that the loss can be reduced. Similarly, the output wires 42 are also copper bars, which not only facilitate connection of the switch assembly 30 to the output interface 22, but also provide good electrical conductivity and reduced losses.

In some embodiments, the input and output wires 41, 42 are hard copper bars to ensure the strength of the input and output wires 41, 42 so that the input and output wires 41, 42 can maintain a desired initial set shape to avoid electrical problems from contacting the input and output wires 41, 42 with portions of the devices of the switch assembly 30.

It will be appreciated that in other embodiments, the input and output wires 41, 42 may be made of soft copper bars or other conductive materials.

In some embodiments, the cluster control box 5 further includes a battery cluster control unit 52 (Battery Control Unit, BCU), where the battery cluster control unit 52 is integrated in the housing 10, so that the battery cluster control unit 52 can be protected by the housing 10, for example, to reduce the probability of dust, leakage, etc. falling onto the battery cluster control unit 52. The battery cluster control unit 52 may supply power through the battery cluster 3, may supply power through a power module integrated on the circuit board 51, may supply power through the battery cluster 3 under normal working conditions, and may supply power through a power module integrated on the circuit board 51 under emergency conditions, where the power module on the circuit board 51 is connected with an uninterruptible power supply or a mains supply. In this embodiment, the battery cluster control unit 52 is integrated in the housing 10, and the circuit board 51 and the power module on the circuit board 51 are also located in the cluster control box 5, so that the power module is connected with the battery cluster control unit 52 through wires, and the wires of the power module do not need to extend out of the housing 10 to be connected with the battery cluster control unit 52 outside the housing 10, so that not only does the housing 10 need to be perforated, but also the difficulty in layout of the connection of the power module and the battery cluster control unit 52 through wires is reduced.

It will be appreciated that each battery pack 4 in turn comprises a plurality of cells. Each battery pack 4 is provided with a battery sampling unit (Battery Monitor Unit, BMU), and the battery sampling units can collect battery data such as voltage, temperature, current and the like of the battery units. The battery cluster control unit 52 is communicatively connected to each battery sampling unit, for example, the battery cluster control unit 52 may be connected by a signal line, and each battery sampling unit may report the collected battery data such as the voltage, the temperature, the current, etc. of the battery unit to the battery cluster control unit 52. The battery cluster control unit 52 may find out the battery pack 4 to be processed based on the information of each battery pack 4 reported by each battery sampling unit.

The heat dissipation structure 60 is used to exchange heat of heat dissipation such as the switch assembly 30, the input wire 41, the output wire 42, the circuit board 51, the battery cluster control unit 52, and the like with heat of the outside of the cluster control box 5 to achieve heat dissipation. The heat dissipation structure 60 in this embodiment can not only realize effective heat dissipation to the heating element in the cluster control box 5, but also have a higher IP protection level, and can effectively avoid invasion of external dust, moisture, insects, etc.

Fig. 7 is a schematic structural diagram of the cluster control box 5 in the embodiment of fig. 2 after hiding the electronic device on the top layer, and the electronic devices in the cluster control box 5 in fig. 2 are stacked in the height direction Z of the cluster control box 5 and are divided into the electronic device on the top layer and the electronic device on the bottom layer.

The embodiment of the application not only can ensure that the cluster control box 5 meets high IP protection level, but also can ensure that the cluster control box 5 is miniaturized. And can meet the heat dissipation requirement of a plurality of densely packed components while the cluster control box 5 is miniaturized.

Referring to fig. 2 and 7, in some embodiments, the isolating switch 35 is provided on the bottom wall 11, and in the depth direction X of the cluster control box 5, the isolating switch 35 is located at one end of the bottom wall 11 near the front panel 131 to reduce the length of the rotation shaft of the isolating switch 35.

The fuse 31 and the contactor 32 are provided on the bottom wall 11, and in the depth direction X of the cluster control box 5, the fuse 31 and the contactor 32 are located between the isolating switch 35 and the rear plate 132, and also between the inner heat conduction assembly 62 and the isolating switch 35, with the air outlet of the inner fan 622 facing the fuse 31.

The input wire 41 or the output wire 42 extends in the depth direction X of the cluster control box 5, the switch assembly 30 is disposed in the extending direction, the input wire 41 is used to connect the input interface 21 and the switch assembly 30, the output wire 42 is used to connect the output interface 22 and the switch assembly 30, and the switch assembly 30 is used to disconnect the line between the input interface 21 and the output interface 22. The input wire 41 includes a positive input wire 411 and a negative input wire 412, the output wire 42 includes a positive output wire 421 and a negative output wire 422, the input interface 21 includes a positive input interface 211 and a negative input interface 212, the output interface 22 includes a positive output interface 221 and a negative output interface 222, the positive input wire 411 and the negative input wire 412 are connected with the positive input interface 211 and the negative input interface 212, respectively, and the positive output wire 421 and the negative output wire 422 are connected with the positive output interface 221 and the negative output interface 222, respectively.

The positive input wire 411 and the negative input wire 412 are connected to the input end of the isolating switch 35, respectively, and the input end of the isolating switch 35 and the output end of the isolating switch 35 are located at opposite ends in the width direction Y of the cluster control box 5.

In some embodiments, the leakage current sensor 33 and the isolation switch 35 are stacked in the height direction Z of the cluster control box 5. The leakage current sensor 33 and the isolating switch 35 are stacked in the height direction Z of the cluster control box 5, so that the space of the cluster control box 5 in the height direction can be effectively utilized, and the space of the cluster control box 5 in the width direction or the depth direction can be saved, so that the cluster control box 5 is miniaturized.

The volume of the disconnecting switch 35 is large, so that the shunt 34 may be stacked with the disconnecting switch 35 in the height direction Z of the cluster control box 5. And further, the space of the cluster control box 5 in the height direction is effectively utilized, so that the cluster control box 5 is miniaturized.

In some embodiments, the output lead 42 and the switch assembly 30 (e.g., the isolation switch 35) are stacked in the height direction Z of the cluster control box 5. And further, the space of the cluster control box 5 in the height direction is effectively utilized, so that the cluster control box 5 is miniaturized. For example, in some embodiments, output lead 42 may be connected to leakage current sensor 33.

It can be appreciated that the shunt 34, the leakage current sensor 33, the output wire 42, and the like are stacked with the isolation switch 35 in the height direction Z of the cluster control box 5, so that the volume of the cluster control box 5 can be effectively reduced. However, at the same time, since the layout of the components of the switch assembly 30 is relatively dense, so that there is a higher demand for heat dissipation, the heat dissipation problem can be satisfied while the cluster control box 5 is miniaturized in combination with the heat dissipation structure 60 as described above.

In some embodiments, the circuit board 51 is provided on the bottom wall 11, and in the width direction Y of the cluster control box 5, the circuit board 51 and the switch assembly 30 are arranged. In this embodiment, since the circuit board 51 belongs to a weak current device and each component of the switch assembly 30 belongs to a strong current device, the switch assembly 30 and the circuit board 51 are distributed in the width direction Y of the cluster control box 5, so that the strong current device and the weak current device can be arranged in a dividing region, which is beneficial to reducing the influence of the strong current device on the weak current device. Meanwhile, as each part of the switch assembly 30 belongs to a high-current device, the heat productivity is large, so that the switch assembly 30 and the circuit board 51 are distributed in the width direction Y of the cluster control box 5, and the heat dissipation structure 60 is beneficial to the key heat dissipation of the switch assembly 30.

In some embodiments, the battery cluster control unit 52 and the circuit board 51 are stacked in the height direction Z of the cluster control box 5. And further, the space of the cluster control box 5 in the height direction, that is, the space above the circuit board 51 is effectively utilized, so that the cluster control box 5 is miniaturized.

In some embodiments, the battery cluster control unit 52 is arranged in the width direction Y of the cluster control box 5 with the switch assembly 30. Because the battery cluster control unit 52 also belongs to the weak current device, the battery cluster control unit 52 and the switch assembly 30 are arranged in a region, which is beneficial to reducing the influence of the strong current device on the battery cluster control unit 52.

It should be understood that the above layout manner of the components of the switch assembly 30 is only one of the protection modes of the present application, and the components of the switch assembly 30 may be laid out in other manners, so long as the space of the cluster control box 5 in the height direction can be fully utilized.

Fig. 8 is a front view of the cluster control box 5 in the embodiment of fig. 2.

Referring to fig. 2, 7 and 8, in some embodiments, the front panel 131 is further provided with a weak current interface 23, wherein the weak current interface 23 corresponds to the circuit board 51 or the battery cluster control unit 52 in the depth direction X of the cluster control box 5 so as to be connected to the weak current interface 23 circuit board 51 or the battery cluster control unit 52. The weak current interface 23 may include a signal line interface such as a signal line connected to the battery cluster control unit 52, a low voltage interface such as an interface connected to an uninterruptible power supply and a utility, a can line interface, and the like.

In some embodiments, the positive input interface 211, the negative input interface 212, the positive output interface 221, the negative output interface 222, and other strong and weak interfaces are disposed on the front panel 131 in areas to avoid interaction.

In some embodiments, knob 351 is located between weak current interface 23 and strong current interface. It will be appreciated that in other embodiments, the knob 351 may be provided at other locations on the front panel 131.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present application should be included in the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (16)

1. A cluster control box for controlling a battery cluster, wherein the cluster control box comprises a shell, a switch assembly and a heat dissipation structure;

the switch assembly is arranged in the shell and is used for conducting or disconnecting a circuit between the battery cluster and the power converter, and the battery cluster comprises a plurality of battery packs connected in series or in parallel;

in the depth direction of the cluster control box, the shell comprises a front panel and a rear panel which are opposite, and an assembly port is arranged on the rear panel;

the heat dissipation structure comprises a base plate, an inner frame body and an inner fan;

The base plate is arranged at the assembly opening and is sealed with the assembly opening, the inner frame body is positioned at one side of the base plate facing the inner cavity of the shell, the inner frame body comprises a top wall, a bottom wall and side walls, the top wall and the bottom wall are opposite in the height direction of the cluster control box, the side walls are arranged at intervals with the base plate, and one ends of the top wall and the bottom wall, which are far away from the side walls, are fixed with the base plate;

The inner fan is arranged on one side of the back plate facing the inside of the shell and is distributed with the inner frame body in the width direction of the cluster control box, one air outlet of the inner fan and one air inlet of the inner fan face the inner frame body, and the other air outlet faces the inside of the shell.

2. The cluster control box of claim 1, wherein the heat dissipating structure further comprises a plurality of heat dissipating fins located within the housing, the plurality of heat dissipating fins located within the housing being located on the substrate surface and being arranged between the top wall and the bottom wall at intervals along a height direction of the cluster control box.

3. The cluster control box of claim 2, wherein the top wall and the bottom wall of the inner frame body are heat radiating fins on the surface of the substrate, the side walls of the inner frame body cover the plurality of heat radiating fins, the top wall and the bottom wall in the depth direction of the cluster control box, and the side walls of the inner frame body are fixed with the top wall and the bottom wall.

4. The cluster control box of claim 1, wherein the space formed by the inner frame body and the base plate communicates with a tuyere of the inner fan toward the inner frame body.

5. The cluster control box of claim 1 or 4, wherein an air inlet of the inner fan faces the inner frame body, the inner fan and the switch assembly are arranged in a depth direction of the cluster control box, and an air outlet of the inner fan faces the switch assembly.

6. The cluster control box of claim 5, wherein the space formed by the inner frame and the base plate communicates with an air intake of the inner fan.

7. The cluster control box according to claim 1 or 2, wherein the heat radiation structure further comprises an outer frame body and an outer fan, the outer frame body being located at a side of the substrate facing the outside of the housing, the outer frame body comprising top and bottom walls opposing in a height direction of the cluster control box and side walls located between the top and bottom walls of the outer frame body, the side walls of the outer frame body being spaced apart from the substrate, and an end of the top and bottom walls of the outer frame body remote from the side walls being fixed to the substrate;

the outer fan is arranged on one side of the back plate facing the outside of the shell, and is arranged with the outer frame body in the width direction of the cluster control box, and an air outlet of the outer fan faces the outer frame body.

8. The cluster control box of claim 7, wherein the space formed by the inner frame body and the base plate is communicated with the air inlet of the inner fan, the air outlet of the inner fan faces the switch assembly, the space formed by the outer frame body and the base plate is communicated with the air outlet of the outer fan, and the air inlet of the outer fan faces away from the back plate.

9. The cluster control box of claim 7, wherein the inner fan and the outer fan are arranged in a depth direction of the cluster control box, and the inner frame body and the outer frame body are arranged in a depth direction of the cluster control box.

10. The cluster control box of claim 7, wherein the heat dissipation structure further comprises a plurality of heat dissipation fins located outside the housing, the plurality of heat dissipation fins located outside the housing being located on the surface of the substrate and being arranged between the top wall of the outer frame and the bottom wall of the outer frame at intervals along the height direction of the cluster control box.

11. The cluster control box of any of claims 1-4, wherein the switch assembly includes a disconnector and a fuse, the disconnector, the fuse, and the inner fan being arranged in a depth direction of the cluster control box.

12. The cluster control box of claim 11, wherein the switch assembly further comprises a leakage current sensor, the leakage current sensor and the isolation switch being stacked in a height direction of the cluster control box.

13. The cluster control box of claim 11, wherein the switch assembly further comprises a shunt, the shunt and the isolation switch being stacked in a height direction of the cluster control box.

14. The cluster control box of any one of claims 1-4, further comprising an input interface, an output interface, and an input wire and an output wire, the input interface, the output interface being provided on the front panel, the input wire or the output wire extending in a depth direction of the cluster control box, the switch assembly being provided in the extending direction, the input wire being for connecting the input interface and the switch assembly, the output wire being for connecting the output interface and the switch assembly, the switch assembly being for disconnecting a line between the input interface and the output interface, the output wire and the switch assembly being stacked in a height direction of the cluster control box.

15. The cluster control box according to any one of claims 1 to 4, further comprising a circuit board and a battery cluster control unit for collecting information of the battery pack, the circuit board and the switch assembly being arranged in a width direction of the cluster control box, the battery cluster control unit and the circuit board being stacked in a height direction of the cluster control box.

16. An energy storage device, characterized in that the energy storage device comprises a box body, one or more battery clusters positioned in the box body and one or more cluster control boxes according to any one of claims 1-15, wherein each battery cluster corresponds to one cluster control box, an electric input interface of the cluster control box is used for being electrically connected with the battery cluster, and an electric output interface of the cluster control box is used for being electrically connected with the power converter.