energy storage device

Abstract

The application provides an energy storage device, which comprises a cabinet, a battery device, an electrical device, a power converter and a plurality of wire harnesses. The battery device is located in the cabinet and comprises a plurality of battery modules. The electrical device comprises a shell and a DC conversion assembly, an AC conversion assembly and an auxiliary power supply arranged in the shell, wherein the auxiliary power supply provides electric energy for the AC conversion assembly. The power converter is located in the cabinet and outside the shell. The electrical device is electrically connected to the battery device through part of the wire harnesses, and the electrical device is electrically connected to the power converter through part of the wire harnesses.

Description

Technical Field

[0001] This application relates to the field of energy storage, and in particular to an energy storage device. Background Technology

[0002] Energy storage technology is a type of energy storage technology. It converts electrical energy into other forms of energy for storage, and then converts that other form of energy back into electrical energy when needed. Energy storage devices are used to store electrical energy. These devices typically require a control and power distribution section to control and supply power to various sub-components of the system. Wiring is required between the power distribution section and the sub-components to achieve this connection. Wiring within energy storage devices presents challenges. Summary of the Invention

[0003] This application provides an energy storage device that helps reduce the wiring complexity within the cabinet.

[0004] This application provides an energy storage device, which includes a cabinet, a battery unit, an electrical unit, a power converter, and multiple wiring harnesses. The battery unit is located inside the cabinet and includes multiple battery modules. The electrical unit includes a housing and a DC conversion component, an AC conversion component, and an auxiliary power supply disposed within the housing, the auxiliary power supply providing electrical energy to the AC conversion component. The power converter is located inside the cabinet but outside the housing. The electrical unit is electrically connected to the battery unit via a portion of the wiring harnesses, and the electrical unit is also electrically connected to the power converter via a portion of the wiring harnesses.

[0005] In the energy storage device of this application embodiment, the electrical device includes a housing and a DC conversion component, an AC conversion component, and an auxiliary power supply integrated and installed within the housing. This improves the integration level of the DC conversion component, AC conversion component, and auxiliary power supply, and simplifies their layout within the cabinet. The DC conversion component, AC conversion component, and auxiliary power supply are pre-installed and connected within the housing. The electrical device is assembled and disassembled as a single integrated structure within the cabinet. The battery device and the DC conversion component are connected via wiring harnesses. The DC conversion component and the power converter are connected via wiring harnesses. The AC conversion component and the power converter are connected via wiring harnesses. The high degree of integration of the electrical device reduces the number of wires within the cabinet, thereby reducing wiring complexity and the likelihood of wiring intersections.

[0006] In one or more of the above optional embodiments, the DC conversion component includes a first terminal and a third terminal, and the wiring harness includes a first positive wiring harness and a first negative wiring harness. The first positive wiring harness is connected to the total positive electrode of the battery device and the first terminal, and the first negative wiring harness is connected to the total negative electrode of the battery device and the first terminal.

[0007] After the battery and electrical devices are installed in the cabinet, they are connected using a first positive wire harness and a first negative wire harness to establish a connection between them. This connection method is simple and easy to operate, reducing the wiring difficulty of connecting the battery and electrical devices.

[0008] In one or more of the above optional embodiments, the AC conversion component includes a second terminal and a fifth terminal, the second terminal being configured to connect to external AC power from the energy storage device. The power converter includes a fourth terminal and a sixth terminal. The wiring harness includes a second positive wiring harness, a second negative wiring harness, and a third wiring harness. The second positive wiring harness connects to the third terminal and the fourth terminal, and transmits DC power. The second negative wiring harness connects to the third terminal and the fourth terminal, and transmits DC power. The third wiring harness connects to the fifth terminal and the sixth terminal, and transmits AC power.

[0009] After the electrical devices and power converter are installed in the cabinet, a second positive and a second negative wiring harness are used to connect the electrical devices and the power converter, thus establishing a connection between the DC conversion components and the power converter. This connection method using the second positive and second negative wiring harnesses is simple and easy to operate, reducing the wiring difficulty between the electrical devices and the power converter.

[0010] After the electrical equipment and power converter are installed in the cabinet, a third wiring harness for transmitting AC power is used to connect the electrical equipment and the power converter, thus establishing a connection between the AC conversion component and the power converter. This third wiring harness connection method is simple and easy to operate, reducing the wiring difficulty for connecting the electrical equipment and the power converter.

[0011] In one or more of the above optional embodiments, the battery device, electrical device and power converter are arranged sequentially along the first direction.

[0012] Compared to battery devices, placing electrical devices closer to the power converter helps to shorten the communication path and electrical connection circuit path between the electrical devices and the power converter, improves the communication signal quality between the electrical devices and the power converter, and can reduce the length of the wiring harness, for example, by reducing the length of the second positive wiring harness, the second negative wiring harness, and the third wiring harness.

[0013] The wiring harness extends from top to bottom, making the wiring neat and orderly. For example, the first positive wire harness, the first negative wire harness, the second positive wire harness, the second negative wire harness, and the third wire harness each extend from top to bottom, making the wiring neat and orderly for each of them.

[0014] In one or more of the above optional embodiments, the cabinet includes a first side panel and a second side panel disposed opposite to each other along a second direction, the first direction being perpendicular to the second direction, the battery device including a total positive electrode and a total negative electrode, along the second direction, the distance between the total positive electrode and the first side panel is less than the distance between the total positive electrode and the second side panel, and the distance between the total negative electrode and the first side panel is less than the distance between the total negative electrode and the second side panel.

[0015] Along the second direction, the distances between the first positive electrode harness and the first negative electrode harness and the first side plate are relatively small. The relatively small distances between the total positive electrode and the total negative electrode of the battery device and the first side plate facilitate the wiring operation of the first positive electrode harness and the first negative electrode harness, and at the same time help to shorten the size of the first positive electrode harness and the first negative electrode harness, simplifying the wiring layout design.

[0016] In one or more of the above optional embodiments, the battery module includes a positive electrode and a negative electrode. Along the second direction, the distance between the positive electrode and the first side plate is less than the distance between the positive electrode and the second side plate, and the distance between the negative electrode and the first side plate is less than the distance between the negative electrode and the second side plate. The wiring harness includes a fourth wiring harness, and the positive and negative electrodes of adjacent battery modules are connected through the fourth wiring harness.

[0017] The positive and negative terminals of each battery module are positioned close to the first side panel, which facilitates the wiring of the fourth wiring harness and also helps to shorten the size of the fourth wiring harness and simplify the wiring layout design.

[0018] In one or more of the above optional embodiments, the electrical device includes a shield, the shield and the housing are connected to form a first chamber, and a first wiring portion, a second wiring portion, a third wiring portion and a fifth wiring portion are all located in the first chamber.

[0019] When performing wiring operations on the first, second, third, and fifth wiring sections, the shielding member is separated from the housing, making the first, second, third, and fifth wiring sections visible for easy wiring operations. After wiring is completed, the shielding member is connected to the housing. The shielding member covers the first, second, third, and fifth wiring sections to provide protection for them.

[0020] In one or more of the above optional embodiments, at least one of the shielding member and the housing is provided with a through hole, the through hole communicating with the first chamber, and the first wiring portion and the third wiring portion are disposed facing the through hole. The cabinet includes a first side plate and a second side plate disposed opposite to each other along a second direction, and the through hole is disposed facing the first side plate.

[0021] The first positive and first negative wire harnesses each pass through a through hole and connect to the first connector. The second positive and second negative wire harnesses each pass through a through hole and connect to the third connector. At least one of the shielding member and the housing can provide a limiting constraint on the first positive, first negative, second positive, and second negative wire harnesses, reducing the possibility of positional displacement or scattering of the first positive, first negative, second positive, and second negative wire harnesses.

[0022] The first positive wire harness, the first negative wire harness, the second positive wire harness, and the second negative wire harness located near the first side plate are easy to pass through the through hole, which helps to shorten the wiring path of the first positive wire harness, the first negative wire harness, the second positive wire harness, and the second negative wire harness at the location of the electrical device.

[0023] In one or more of the above optional embodiments, the auxiliary power supply includes a DC auxiliary power supply, which is connected to the DC conversion component and obtains power from the DC conversion component. The DC auxiliary power supply provides power to the AC conversion component.

[0024] The DC auxiliary power supply draws power from the DC conversion component and outputs DC power. The AC conversion component includes a circuit board and components mounted on the circuit board. The DC auxiliary power supply is configured to provide power to the circuit board and components to enable the AC conversion component to operate normally. The DC auxiliary power supply can improve the convenience and reliability of powering the AC conversion component.

[0025] In one or more of the above optional embodiments, the auxiliary power supply includes an AC auxiliary power supply connected to an AC conversion component. The AC auxiliary power supply is configured to obtain electrical energy from outside the energy storage device and provide electrical energy to the AC conversion component.

[0026] The AC auxiliary power supply draws electrical energy from outside the energy storage device (e.g., from the external power grid) and outputs DC power. The AC conversion assembly includes a circuit board and components mounted on it. The AC auxiliary power supply is configured to provide power to the circuit board and components to enable the AC conversion assembly to function properly. The AC auxiliary power supply can improve the convenience and reliability of powering the AC conversion assembly.

[0027] In one or more of the above optional embodiments, the AC conversion component includes a conductive sheet connected to external AC power of the energy storage device. The conductive sheet is located on the air outlet side of the first vent, and along a third direction, the conductive sheet is located between the insulating member and the front wall.

[0028] In one or more of the above optional embodiments, the housing includes a front wall and a rear wall spaced apart along a third direction. The electrical device includes an isolator, a first air inlet channel, and a first fan. The isolator is disposed within and connected to the housing, and includes a main body and an inclined portion. The main body has a first vent, and the included angle between the main body and the inclined portion is an obtuse angle located on the outlet side of the first vent. The first air inlet channel is located between the isolator and the rear wall and communicates with the first vent. An auxiliary power supply is disposed on the outlet side of the first vent. The first fan is disposed within the housing and configured to drive air through the first vent and the first air inlet channel.

[0029] The first fan acts as a turbulence unit within the housing, dispersing heat around the electrical components and reducing the likelihood of heat buildup that could cause overheating. This allows temperature-sensitive components to operate stably and normally. The heat generated by the electrical components can then be dissipated to the outside through the housing.

[0030] In one or more of the above alternative embodiments, the electrical device includes a second fan disposed outside the housing and configured to dissipate heat from the housing.

[0031] The second fan increases the airflow velocity outside the housing, thereby improving the efficiency of heat dissipation through the housing. Heat inside the housing is dissipated through the housing, and the first and second fans work together to dissipate heat from the electrical components.

[0032] In one or more of the above alternative embodiments, the auxiliary power supply is configured to provide power to the first fan and the second fan.

[0033] The housing is a closed structure. The auxiliary power supply inside the housing can improve the convenience and reliability of powering the first and second fans, while reducing the possibility of needing to open wire passages on the housing due to the use of an external power supply.

[0034] In one or more of the above optional embodiments, the housing includes a left wall and a right wall spaced apart along a second direction, and a third direction perpendicular to the second direction. A gap for air passage is provided between the inclined portion and the left wall, the main body and the right wall are connected, and the inclined portion and the rear wall are separated at an obtuse angle of 130° to 170°.

[0035] The obtuse angle is 130° to 170°, which helps to improve the obstruction effect of the inclined part on the airflow, reduces the possibility that the airflow will flow back directly to the first air inlet channel after being discharged from the first vent outlet side, and enables the inclined part to effectively guide the airflow toward the front wall.

[0036] In one or more of the above alternative embodiments, the inclined portion and the left wall are separated.

[0037] In one or more of the above optional embodiments, the first air inlet channel includes a first sub-channel and a second sub-channel. The main body and the rear wall form the first sub-channel, which gradually decreases in size along the air inlet direction of the first air inlet channel. The inclined portion and the rear wall form the second sub-channel, which gradually decreases in size along the air inlet direction of the first air inlet channel.

[0038] Along the air intake direction of the first air intake channel, when the airflow flows in the first sub-channel, the airflow velocity increases, which is conducive to the rapid flow of air in the first sub-channel and makes it easier for the airflow outside the first sub-channel to enter the first sub-channel and then be discharged through the first vent.

[0039] In one or more of the above optional embodiments, the housing includes a left wall and a right wall spaced apart along a second direction, the third direction being perpendicular to the second direction. The DC conversion assembly includes a fuse, and along the second direction, the distance between the fuse and the left wall is less than the distance between the fuse and the right wall.

[0040] The fuse itself generates relatively a lot of heat. The airflow velocity is relatively fast in the areas near the front and left walls. By placing the fuse near the left wall, the airflow can dissipate heat more quickly, reducing the possibility of heat accumulation around the fuse and causing the fuse temperature to be too high. This allows the fuse to operate stably and reduces the possibility of false alarms due to poor fuse heat dissipation.

[0041] In one or more of the above optional embodiments, the housing includes a left wall and a right wall spaced apart along a second direction, and a top wall and a bottom wall spaced apart along a first direction. The left wall, right wall, top wall, bottom wall, front wall, and rear wall are interconnected and form a closed receiving space.

[0042] The housing is waterproof, so that it can protect the electrical components inside.

[0043] In one or more of the above optional embodiments, the electrical device includes a flow guide, which is disposed outside the housing and connected to the housing, and a second air inlet channel is formed between the flow guide and the housing. The flow guide includes a second vent that communicates with the second air inlet channel. The electrical device includes a second fan configured to drive air through the second air inlet channel and the second vent.

[0044] In one or more of the above optional embodiments, the housing includes a top wall and a bottom wall spaced apart along a first direction, a third direction perpendicular to the first direction, a second air inlet channel including a third sub-channel and a fourth sub-channel, a guide member connected to the bottom wall and forming the third sub-channel, a guide member connected to the rear wall and forming the fourth sub-channel, and a second fan located on the rear side of the rear wall. The second vent is an air outlet and is located on the rear side of the rear wall.

[0045] Electrical components are fixed to the bottom wall. The heat generated by these components can be dissipated relatively quickly through the bottom wall, resulting in a relatively high bottom wall temperature. The formation of a third sub-channel between the heat guide and the bottom wall allows for heat exchange within this channel, improving the heat dissipation efficiency of the casing and enhancing the overall cooling effect.

[0046] The airflow in the fourth sub-channel can exchange heat with the rear wall of the housing, which can reduce the airflow temperature in the first air inlet channel and further improve the heat dissipation of electrical components.

[0047] The second fan is located within the fourth sub-channel. The airflow guide protects the second fan, reducing the likelihood of structural damage from impacts or compression.

[0048] In one or more of the above optional embodiments, the guide includes a base and a side portion connected to the base. The base is connected to the bottom wall and forms a third sub-channel, and the side portion is connected to the rear wall and forms a fourth sub-channel. Along the third direction, the base extends beyond the bottom wall.

[0049] In one or more of the above optional embodiments, the cabinet includes a front door panel and a rear door panel spaced apart along a third direction, the front door panel including a first heat dissipation hole and the rear door panel including a second heat dissipation hole.

[0050] Airflow with a relatively low external temperature can enter the cabinet through the first ventilation hole. This airflow can exchange heat with the electrical components and then exit through the second ventilation hole, thus dissipating heat from the electrical components. Positioning the electrical components between the first and second ventilation holes along a third direction improves heat dissipation efficiency. Attached Figure Description

[0051] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0052] Figure 1 This is a schematic diagram of the structure of an energy storage device provided in an embodiment of this application;

[0053] Figure 2 This is a schematic diagram of the front door panel of an energy storage device in an embodiment of this application, in the open state.

[0054] Figure 3 This is a partial structural schematic diagram of an energy storage device provided in an embodiment of this application;

[0055] Figure 4 This is a partial structural schematic diagram of an electrical device provided in an embodiment of this application;

[0056] Figure 5 This is a partial structural schematic diagram of an electrical device provided in an embodiment of this application;

[0057] Figure 6 yes Figure 3 Enlarged view of point M in the middle;

[0058] Figure 7 yes Figure 3 Enlarged view of point P in the middle;

[0059] Figure 8 This is a partial structural schematic diagram of an electrical device provided in an embodiment of this application;

[0060] Figure 9 This is a partial structural schematic diagram of an electrical device provided in an embodiment of this application;

[0061] Figure 10 This is a partially exploded structural diagram of an electrical device provided in an embodiment of this application;

[0062] Figure 11 This is a partial cross-sectional structural schematic diagram of an electrical device provided in an embodiment of this application;

[0063] Figure 12 This is a partial structural schematic diagram of an energy storage device provided in an embodiment of this application.

[0064] Explanation of reference numerals in the attached figures:

[0065] 10. Energy storage device; 101. First positive electrode harness; 102. First negative electrode harness; 103. Second positive electrode harness; 104. Second negative electrode harness; 105. Third harness; 106. Fourth harness;

[0066] 20. Cabinet body; 201. First side panel; 202. Second side panel; 203. Front door panel; 2031. First ventilation hole; 204. Rear door panel; 2041. Second ventilation hole;

[0067] 30. Battery assembly; 301. Main positive electrode; 302. Main negative electrode; 31. Battery module; 311. Positive electrode; 312. Negative electrode;

[0068] 40. Power converter; 41. Fourth wiring section; 42. Sixth wiring section;

[0069] 50. Electrical device; 501. First air inlet channel; 5011. First sub-channel; 5012. Second sub-channel; 502. Second air inlet channel; 5021. Third sub-channel; 5022. Fourth sub-channel; 503. First chamber; 504. Through hole;

[0070] 60. Shell; 61. Front wall; 62. Rear wall; 63. Left wall; 64. Right wall; 65. Top wall; 66. Bottom wall;

[0071] 70. Isolation component; 71. Main body; 711. First ventilation opening; 72. Inclined part;

[0072] 80. Electrical components; 81. Auxiliary power supply; 811. DC auxiliary power supply; 812. AC auxiliary power supply; 82. DC conversion assembly; 8201. First wiring section; 8202. Third wiring section; 821. Fuse; 83. AC conversion assembly; 8301. Second wiring section; 8302. Fifth wiring section; 831. Conductive sheet;

[0073] 90. First fan; 100. Second fan; 110. Air guide; 1101. Second vent; 1102. Base; 1103. Side; 120. Heat exchange fins; 130. Shielding component; 140. Liquid cooling device; 150. Liquid cooling circulation pipeline; 200. Gap; S1. Air inlet direction of the first air inlet channel; S2. Air inlet direction of the second air inlet channel; X. First direction; Y. Second direction; Z. Third direction. Detailed Implementation

[0074] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0075] It should be noted that, unless otherwise stated, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by those skilled in the art to which the embodiments of this application pertain.

[0076] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0077] Furthermore, technical terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise explicitly defined.

[0078] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0079] See Figure 1 , Figure 2 and Figure 3 As shown in the figure, this application embodiment provides an energy storage device 10, which includes a cabinet 20 and a battery device 30. The battery device 30 is located inside the cabinet 20. The battery device 30 includes a plurality of battery modules 31.

[0080] In this embodiment of the energy storage device 10, the cabinet 20 provides a mounting base for the battery module 31. The cabinet 20 protects the battery module 31, reducing the possibility of structural damage due to collision. The battery module 31 stores electrical energy. When the energy storage device 10 needs to discharge externally, the battery module 31 can output electrical energy. The external power grid can also input electrical energy into the battery module 31 to charge it. The battery module 31 is a device that can convert electrical energy into chemical energy and vice versa.

[0081] See also some of the possible implementation methods. Figure 4 , Figure 5 and Figure 6 As shown, the energy storage device 10 includes an electrical unit 50. The electrical unit 50 includes a housing 60 and a DC conversion component 82, an AC conversion component 83, and an auxiliary power supply 81 disposed within the housing 60. The auxiliary power supply 81 provides electrical energy to the AC conversion component 83. The DC conversion component 82, the AC conversion component 83, and the auxiliary power supply 81 are integrated and installed within the housing 60. The electrical unit 50 is an integrated component. The electrical unit 50 is installed or removed as a single unit within the cabinet 20.

[0082] In some examples, the DC conversion component 82 includes the function of controlling the charging and discharging of the battery device 30. The DC conversion component 82 also includes the function of disconnecting the circuit of the battery device 30 in the event of an abnormal situation.

[0083] In some feasible implementations, the energy storage device 10 includes multiple wiring harnesses. An electrical device 50 is electrically connected to the battery device 30 via portions of these wiring harnesses.

[0084] See also some of the possible implementation methods. Figure 3 and Figure 6 As shown, the energy storage device 10 includes a power converter 40. The power converter 40 is located inside the cabinet 20 and outside the housing 60. The electrical device 50 is electrically connected to the power converter 40 via a portion of the wiring harness.

[0085] See also some of the possible implementation methods. Figure 6 and Figure 7 As shown, the DC conversion assembly 82 includes a first wiring portion 8201 and a third wiring portion 8202. Multiple wiring harnesses include a first positive wiring harness 101 and a first negative wiring harness 102. The battery device 30 has a total positive electrode 301 and a total negative electrode 302. The first positive wiring harness 101 connects the total positive electrode 301 of the battery device 30 and the first wiring portion 8201. The first negative wiring harness 102 connects the total negative electrode 302 of the battery device 30 and the first wiring portion 8201.

[0086] After the battery device 30 and the electrical device 50 are installed in the cabinet 20, the battery device 30 and the electrical device 50 are connected using the first positive wire harness 101 and the first negative wire harness 102 to establish a connection between them. The connection method of the first positive wire harness 101 and the first negative wire harness 102 is simple and easy to operate, reducing the wiring difficulty of connecting the battery device 30 and the electrical device 50.

[0087] See also some of the possible implementation methods. Figure 3 and Figure 6 As shown, the AC conversion component 83 includes a second wiring section 8301 and a fifth wiring section 8302. The second wiring section 8301 is configured to be connected to external AC power from the energy storage device 10. For example, the external AC power may include the power grid or a load. The AC conversion component 83 functions to protect the power converter 40. When the energy storage device 10 is connected to a load, the AC conversion component 83 also functions to protect the load. For example, the AC conversion component 83 includes a circuit breaker.

[0088] In some implementations, the power converter 40 includes a fourth terminal 41 and a sixth terminal 42. The function of the power converter 40 includes conversion between direct current and alternating current.

[0089] See also some of the possible implementation methods. Figure 6 As shown, the wiring harness includes a second positive wiring harness 103 and a second negative wiring harness 104. The second positive wiring harness 103 is connected to the third terminal 8202 and the fourth terminal 41. The second positive wiring harness 103 transmits DC power. The second negative wiring harness 104 is connected to the third terminal 8202 and the fourth terminal 41. The second negative wiring harness 104 also transmits DC power.

[0090] After the electrical device 50 and the power converter 40 are installed in the cabinet 20, the electrical device 50 and the power converter 40 are connected using the second positive wire harness 103 and the second negative wire harness 104 for transmitting DC power, thereby establishing a connection between the DC conversion component 82 and the power converter 40. The connection method of the second positive wire harness 103 and the second negative wire harness 104 is simple and easy to operate, reducing the wiring difficulty of connecting the electrical device 50 and the power converter 40.

[0091] See also some of the possible implementation methods. Figure 6 As shown, the wiring harness includes a third wiring harness 105. The third wiring harness 105 connects the fifth terminal 8302 and the sixth terminal 42. The third wiring harness 105 transmits AC power.

[0092] After the electrical device 50 and the power converter 40 are installed in the cabinet 20, the electrical device 50 and the power converter 40 are connected using the third wiring harness 105 for transmitting AC power, thereby establishing a connection between the AC conversion component 83 and the power converter 40. The third wiring harness 105 connection method is simple and easy to operate, reducing the wiring difficulty for connecting the electrical device 50 and the power converter 40.

[0093] In the energy storage device 10 of this application embodiment, the electrical device 50 includes a housing 60 and a DC conversion component 82, an AC conversion component 83, and an auxiliary power supply 81 integrated and installed within the housing 60. This improves the integration level of the DC conversion component 82, AC conversion component 83, and auxiliary power supply 81, and simplifies their layout within the cabinet 20. The DC conversion component 82, AC conversion component 83, and auxiliary power supply 81 are pre-installed and connected within the housing 60. The electrical device 50 is assembled and disassembled as a single unit within the cabinet 20. The battery device 30 and the DC conversion component 82 are connected via wiring harnesses. The DC conversion component 82 and the power converter 40 are connected via wiring harnesses. The AC conversion component 83 and the power converter 40 are connected via wiring harnesses. The high degree of integration of the electrical device 50 reduces the number of wires within the cabinet 20, thereby reducing wiring complexity and the likelihood of wiring intersections.

[0094] See also some of the possible implementation methods. Figure 3 and Figure 6 As shown, the battery device 30, electrical device 50, and power converter 40 are arranged sequentially along the first direction X. For example, the first direction X is the direction of gravity. The spacing between the battery device 30, electrical device 50, and power converter 40 facilitates good heat dissipation for each of them.

[0095] The arrangement of the electrical device 50 closer to the power converter 40 than the battery device 30 helps to shorten the communication path and electrical connection circuit path between the electrical device 50 and the power converter 40, improves the quality of the communication signal between the electrical device 50 and the power converter 40, and can reduce the length of the wiring harness, for example, by reducing the length of the second positive wiring harness 103, the second negative wiring harness 104, and the third wiring harness 105.

[0096] The wiring harness extends from top to bottom, making the wiring neat and orderly. For example, the first positive wire harness 101, the first negative wire harness 102, the second positive wire harness 103, the second negative wire harness 104, and the third wire harness 105 extend from top to bottom, making the wiring neat and orderly.

[0097] See also some of the possible implementation methods. Figure 3 and Figure 6 As shown, the energy storage device 10 includes a liquid cooling unit 140 and a liquid cooling circulation line 150. The liquid cooling circulation line 150 is connected to the liquid cooling unit 140. The liquid cooling unit 140 and the liquid cooling circulation line 150 are configured to cool the battery unit 30. Along the first direction X, the battery unit 30, the liquid cooling unit 140, the electrical unit 50, and the power converter 40 are arranged sequentially.

[0098] See also some of the possible implementation methods. Figure 1 and Figure 2 As shown, the cabinet 20 includes a first side panel 201 and a second side panel 202 disposed opposite to each other along the second direction Y. The first direction X is perpendicular to the second direction Y.

[0099] The battery device 30 includes a total positive electrode 301 and a total negative electrode 302. Along the second direction Y, the distance between the total positive electrode 301 and the first side plate 201 is less than the distance between the total positive electrode 301 and the second side plate 202. The distance between the total negative electrode 302 and the first side plate 201 is less than the distance between the total negative electrode 302 and the second side plate 202.

[0100] Along the second direction Y, the distances between the first positive electrode harness 101 and the first negative electrode harness 102 and the first side plate 201 are relatively small. The relatively small distances between the total positive electrode 301 and the total negative electrode 302 of the battery device 30 and the first side plate 201 facilitate the wiring operation of the first positive electrode harness 101 and the first negative electrode harness 102, and at the same time help to shorten the size of the first positive electrode harness 101 and the first negative electrode harness 102, simplifying the wiring layout design.

[0101] In some examples, along the second direction Y, the distance between the first terminal 8201 and the first side plate 201 of the DC-DC converter 82 is less than the distance between the first terminal 8201 and the second side plate 202. Also along the second direction Y, the distance between the third terminal 8202 and the first side plate 201 of the DC-DC converter 82 is less than the distance between the third terminal 8202 and the second side plate 202.

[0102] The first wiring portion 8201 and the third wiring portion 8202 are located on the same side of the electrical device 50. Relative to the second side plate 202, both the first wiring portion 8201 and the third wiring portion 8202 are positioned close to the first side plate 201.

[0103] The first wiring section 8201 is located near the first side plate 201, which facilitates the wiring of the first positive wire harness 101 and the first negative wire harness 102. At the same time, it helps to shorten the size of the first positive wire harness 101 and the first negative wire harness 102 and simplify the wiring layout design.

[0104] Relative to the second side plate 202, the second positive wire harness 103 and the second negative wire harness 104 are both located close to the first side plate 201. The third wiring section 8202 is located close to the first side plate 201, which facilitates the wiring of the second positive wire harness 103 and the second negative wire harness 104, and also helps to shorten the size of the second positive wire harness 103 and the second negative wire harness 104, simplifying the wiring layout design.

[0105] In some examples, along the second direction Y, the distance between the fourth terminal 41 of the power converter 40 and the first side plate 201 is less than the distance between the fourth terminal 41 and the second side plate 202.

[0106] In some examples, a sixth wiring portion 42 is provided on the side of the power converter 40 away from the first side plate 201 along the second direction Y. Along the first direction X, the fifth wiring portion 8302 of the AC conversion assembly 83 is located above the sixth wiring portion 42. The close proximity of the fifth wiring portion 8302 and the sixth wiring portion 42 helps to shorten the communication path and electrical connection loop path between them, improves the communication signal quality between the electrical device 50 and the power converter 40, and reduces the length of the third wiring harness 105. The third wiring harness 105 extends along the first direction X, with neat and orderly wiring.

[0107] See also some of the possible implementation methods. Figure 1 , Figure 3 and Figure 7As shown, the battery module 31 includes a positive electrode 311 and a negative electrode 312. Along the second direction Y, the distance between the positive electrode 311 and the first side plate 201 is less than the distance between the positive electrode 311 and the second side plate 202. The distance between the negative electrode 312 and the first side plate 201 is less than the distance between the negative electrode 312 and the second side plate 202.

[0108] In some implementations, the wiring harness includes a fourth wiring harness 106. The positive terminal 311 and negative terminal 312 of adjacent battery modules 31 are connected via the fourth wiring harness 106. Relative to the second side plate 202, along the second direction Y, the fourth wiring harness 106 is positioned close to the first side plate 201. Adjacent battery modules 31 are connected in series via the fourth wiring harness 106.

[0109] The positive terminal 311 and negative terminal 312 of each battery module 31 are located close to the first side plate 201, which facilitates the wiring of the fourth wiring harness 106 and also helps to shorten the size of the fourth wiring harness 106 and simplify the wiring layout design.

[0110] In some examples, multiple battery modules 31 in the battery device 30 are arranged along a first direction X. The height direction of the battery module 31 is the same as the first direction X. The width direction of the battery module 31 is the same as the second direction Y. The width of the battery module 31 is greater than the height of the battery module 31. The length direction of the battery module 31 is the same as the third direction Z. The first direction X, the second direction Y, and the third direction Z are all perpendicular to each other.

[0111] In some feasible ways, relative to the second side plate 202, along the second direction Y, the first positive wire harness 101, the first negative wire harness 102, the second positive wire harness 103, the second negative wire harness 104, and the fourth wire harness 106 are all arranged close to the first side plate 201, so that the wiring of the first positive wire harness 101, the first negative wire harness 102, the second positive wire harness 103, the second negative wire harness 104, and the fourth wire harness 106 is neat and orderly, reducing the complexity of the wiring layout and reducing the possibility of wiring intersections.

[0112] See also some of the possible implementation methods. Figure 4 and Figure 11 As shown, the electrical device 50 includes a shield 130. The shield 130 is connected to the housing 60 and forms a first chamber 503. The first wiring portion 8201, the second wiring portion 8301, the third wiring portion 8202, and the fifth wiring portion 8302 are all located within the first chamber 503.

[0113] When wiring operations are performed on the first wiring section 8201, the second wiring section 8301, the third wiring section 8202, and the fifth wiring section 8302, the shielding member 130 is separated from the housing 60, making the first wiring section 8201, the second wiring section 8301, the third wiring section 8202, and the fifth wiring section 8302 visible for easy wiring operations. After wiring is completed, the shielding member 130 is connected to the housing 60. The shielding member 130 shields the first wiring section 8201, the second wiring section 8301, the third wiring section 8202, and the fifth wiring section 8302 to provide protection for them.

[0114] In some examples, the shield 130 and the housing 60 are detachably connected by fasteners such as screws or snap-fit ​​mechanisms.

[0115] In some examples, at least one of the shield 130 and the housing 60 is provided with a through hole 504 (see Figure 4 (As shown). The through hole 504 communicates with the first chamber 503. The first wiring portion 8201 and the third wiring portion 8202 are disposed facing the through hole 504. The cabinet 20 includes a first side plate 201 and a second side plate 202 disposed opposite to each other along the second direction Y. Along the second direction Y, the through hole 504 is disposed facing the first side plate 201.

[0116] The first positive electrode harness 101 and the first negative electrode harness 102 each pass through the through hole 504 and are connected to the first wiring portion 8201. The second positive electrode harness 103 and the second negative electrode harness 104 each pass through the through hole 504 and are connected to the third wiring portion 8202. At least one of the shielding member 130 and the housing 60 can provide a limiting constraint on the first positive electrode harness 101, the first negative electrode harness 102, the second positive electrode harness 103, and the second negative electrode harness 104, reducing the possibility of positional displacement or scattering of the first positive electrode harness 101, the first negative electrode harness 102, the second positive electrode harness 103, and the second negative electrode harness 104.

[0117] The first positive wire harness 101, the first negative wire harness 102, the second positive wire harness 103, and the second negative wire harness 104, which are located near the first side plate 201, can easily pass through the through hole 504, which helps to shorten the wiring path of the first positive wire harness 101, the first negative wire harness 102, the second positive wire harness 103, and the second negative wire harness 104 at the electrical device 50 position.

[0118] For example, the first positive electrode harness 101, the first negative electrode harness 102, the second positive electrode harness 103, and the second negative electrode harness 104 share a through hole 504, which helps to reduce the number of through holes 504.

[0119] Exemplarily, the housing 60 has an internal space. The DC conversion component 82, AC conversion component 83, and auxiliary power supply 81 are disposed within this internal space. Exemplarily, the interior of the housing 60 is a closed chamber. The housing 60 has waterproof requirements, such as meeting an IP65 protection rating, so that the housing 60 can protect the electrical components 80 within it. The closed chamber inside the housing 60 is not connected to the external environment and is an independent space. The housing 60 does not have any ventilation openings communicating with the closed chamber for heat dissipation.

[0120] See Figure 4 As shown, a through hole 504 is provided on the housing 60. The through hole 504 is located on the outside of the housing 60 and is not connected to the internal space of the housing 60. One assembly method includes separating the shielding member 130 from the housing 60, connecting the first positive electrode harness 101 and the first negative electrode harness 102 to the total positive electrode 301 and the total negative electrode 302 of the battery device 30, passing the first positive electrode harness 101 and the first negative electrode harness 102 through the through hole 504 and connecting them to the first wiring portion 8201, connecting the second positive electrode harness 103 and the second negative electrode harness 104 to the fourth wiring portion 41 of the power converter 40, passing the second positive electrode harness 103 and the second negative electrode harness 104 through the through hole 504 and connecting them to the third wiring portion 8202, and connecting and fixing the shielding member 130 to the housing 60.

[0121] For example, a through hole 504 is provided on the shielding member 130. One assembly method includes separating the shielding member 130 from the housing 60, connecting a first positive electrode harness 101 and a first negative electrode harness 102 to the total positive electrode 301 and the total negative electrode 302 of the battery device 30, passing the first positive electrode harness 101 and the first negative electrode harness 102 through the through hole 504 and connecting them to the first wiring portion 8201, connecting a second positive electrode harness 103 and a second negative electrode harness 104 to the fourth wiring portion 41 of the power converter 40, passing the second positive electrode harness 103 and the second negative electrode harness 104 through the through hole 504 and connecting them to the third wiring portion 8202, and connecting and fixing the shielding member 130 to the housing 60.

[0122] For example, a portion of the through hole 504 is provided on the housing 60, and another portion of the through hole 504 is provided on the shielding member 130. One assembly method includes separating the shielding member 130 from the housing 60, connecting the first positive electrode harness 101 and the first negative electrode harness 102 to the total positive electrode 301 and the total negative electrode 302 of the battery device 30, connecting the first positive electrode harness 101 and the first negative electrode harness 102 to the first wiring portion 8201, connecting the second positive electrode harness 103 and the second negative electrode harness 104 to the fourth wiring portion 41 of the power converter 40, connecting the second positive electrode harness 103 and the second negative electrode harness 104 to the third wiring portion 8202, connecting and fixing the shielding member 130 to the housing 60, and having the first positive electrode harness 101, the first negative electrode harness 102, the second positive electrode harness 103, and the second negative electrode harness 104 each pass through the through hole 504 formed by the housing 60 and the shielding member 130.

[0123] See in some examples Figure 1 , Figure 2 and Figure 6 As shown, the cabinet 20 includes a front door panel 203 and a rear door panel 204. The front door panel 203 and the rear door panel 204 are spaced apart along the third direction Z. The first wiring part 8201, the second wiring part 8301, the third wiring part 8202, the fourth wiring part 41, the fifth wiring part 8302, the sixth wiring part 42, and the cover 130 are all arranged facing the front door panel 203.

[0124] After opening the front door panel 203, the obstruction 130 becomes visible, facilitating the disassembly and assembly of the obstruction 130 and the housing 60, thus reducing the difficulty of disassembling and assembling the obstruction 130. After the obstruction 130 and the housing 60 are separated, the first wiring section 8201, the second wiring section 8301, the third wiring section 8202, the fourth wiring section 41, the fifth wiring section 8302, and the sixth wiring section 42 become visible, facilitating wiring operations and reducing the difficulty of wiring operations.

[0125] For example, when the front door panel 203 is in the closed state, the battery device 30, the electrical device 50 and the power converter 40 are disposed in the space formed by the first side panel 201, the front door panel 203, the second side panel 202 and the rear door panel 204.

[0126] See also some of the possible implementation methods. Figure 5 As shown, the auxiliary power supply 81 includes a DC auxiliary power supply 811. The DC auxiliary power supply 811 is connected to the DC conversion component 82 and draws power from the DC conversion component 82. The DC auxiliary power supply 811 provides power to the AC conversion component 83.

[0127] The DC auxiliary power supply 811 draws power from the DC conversion component 82 and outputs DC power. The AC conversion component 83 includes a circuit board and components mounted on the circuit board. The DC auxiliary power supply 811 is configured to provide power to the circuit board and components to enable the AC conversion component 83 to operate normally. The DC auxiliary power supply 811 can improve the convenience and reliability of powering the AC conversion component 83.

[0128] See also some of the possible implementation methods. Figure 5 As shown, the auxiliary power supply 81 includes an AC auxiliary power supply 812. The AC auxiliary power supply 812 is connected to the AC conversion component 83. The AC auxiliary power supply 812 is configured to obtain electrical energy from outside the energy storage device 10 and provide electrical energy to the AC conversion component 83.

[0129] The AC auxiliary power supply 812 obtains electrical energy from outside the energy storage device 10 (e.g., from the external power grid), and outputs DC power. The AC conversion assembly 83 includes a circuit board and components mounted on the circuit board. The AC auxiliary power supply 812 is configured to provide power to the circuit board and components to enable the AC conversion assembly 83 to operate normally. The AC auxiliary power supply 812 can improve the convenience and reliability of powering the AC conversion assembly 83.

[0130] In some possible implementations, the auxiliary power supply 81 includes a DC auxiliary power supply 811 and an AC auxiliary power supply 812. Both the DC auxiliary power supply 811 and the AC auxiliary power supply 812 are configured to provide power to the AC conversion component 83, which helps improve the operational stability of the AC conversion component 83 and reduces the possibility of it failing to operate due to a lack of power. For example, preferentially using the AC auxiliary power supply 812 to provide power to the AC conversion component 83 helps reduce the power loss of the battery device 30.

[0131] See also some of the possible implementation methods. Figure 5 and Figure 8 As shown, the electrical device 50 includes a housing 60 and a plurality of electrical components 80, which are located within the housing 60. The housing 60 includes a front wall 61 and a rear wall 62 spaced apart along a third direction Z.

[0132] See also some of the possible implementation methods. Figure 8 and Figure 9 As shown, the isolator 70 is disposed within and connected to the housing 60. The isolator 70 includes a main body 71 and an inclined portion 72. The main body 71 is provided with a first vent 711. The included angle between the main body 71 and the inclined portion 72 is an obtuse angle D. The obtuse angle D is located on the air outlet side of the first vent 711.

[0133] In some possible implementations, electrical component 80 includes an auxiliary power supply 81. The auxiliary power supply 81 is located on the exhaust side of the first vent 711. The auxiliary power supply 81 generates heat when it operates. Air exhausted from the first vent 711 can flow through the auxiliary power supply 81 and dissipate heat, so that heat does not accumulate around the auxiliary power supply 81.

[0134] In some feasible implementations, the electrical component 80 is located outside the first air intake channel 501. The electrical component 80 is not installed inside the first air intake channel 501.

[0135] In some possible implementations, the electrical device 50 includes a first fan 90 disposed within the housing 60. The first fan 90 is configured to drive airflow through a first vent 711 and a first air intake passage 501 and to dissipate heat from the electrical components 80. Figure 5 , Figure 8 and Figure 9 The dashed line in the middle is a simplified schematic diagram of the airflow direction. The airflow is unidirectional within the first air inlet channel 501.

[0136] In some possible implementations, the electrical device 50 includes a first air intake channel 501 located between the isolator 70 and the rear wall 62. The first air intake channel 501 communicates with a first vent 711. The inclined portion 72 can restrict airflow back to the first air intake channel 501, guiding airflow toward the front wall 61, thereby allowing more air to flow toward the electrical components 80 and improving heat dissipation for the electrical components 80.

[0137] Different electrical components 80 generate different amounts of heat. The first fan 90 acts as a turbulence unit within the housing 60, dispersing heat around each electrical component 80 and reducing the likelihood of heat accumulation around any one or several components 80, which could lead to overheating. This ensures that temperature-sensitive components 80 can operate stably and normally. The heat generated by the electrical components 80 can be dissipated to the outside through the housing 60.

[0138] In some possible implementations, the electrical device 50 includes a second fan 100 disposed outside the housing 60. The second fan 100 is configured to dissipate heat from the housing 60. The second fan 100 can increase the airflow velocity outside the housing 60 to improve the efficiency of heat dissipation through the housing 60. Heat inside the housing 60 is dissipated through the housing 60, and the first fan 90 and the second fan 100 cooperate to dissipate heat from the electrical components 80.

[0139] In some feasible ways, the electrical device 50 can be a high-voltage box.

[0140] In the electrical device 50 of this application embodiment, an isolator 70 is provided inside the housing 60. Under the disturbance of the first fan 90, the heat inside the housing 60 is dispersed, reducing the possibility of heat accumulating around any one or more electrical components 80 and causing the temperature of the electrical component 80 to be too high. This allows the temperature-sensitive electrical components 80 to operate stably and normally, improving the working stability and reliability of the electrical device 50. When the first fan 90 disturbs the airflow inside the housing 60, the inclined portion 72 of the isolator 70 can guide the airflow toward the front wall 61, then through the electrical components 80 and back to the first air inlet channel 501. This facilitates the airflow to turbulently disperse the heat around the electrical components 80, allowing the heat to be dispersed within the housing 60. This facilitates heat dissipation to the outside through more areas of the housing 60, improving the heat dissipation efficiency of the housing 60.

[0141] In some possible implementations, auxiliary power supply 81 is configured to provide power to the first fan 90 and the second fan 100.

[0142] The housing 60 is a closed structure. The auxiliary power supply 81 inside the housing 60 can improve the convenience and reliability of powering the first fan 90 and the second fan 100, while reducing the possibility of needing to open a wire passage on the housing 60 due to the use of an external power supply.

[0143] See also some of the possible implementation methods. Figure 8 and Figure 9 As shown, the housing 60 includes a left wall 63 and a right wall 64 spaced apart along a second direction Y. A third direction Z is perpendicular to the second direction Y. An air gap 200 is provided between the inclined portion 72 and the left wall 63. The main body 71 and the right wall 64 are connected. The inclined portion 72 and the rear wall 62 are separate.

[0144] The inclined portion 72 and the left wall 63 are separated, meaning that the inclined portion 72 and the left wall 63 are not connected and a gap is formed for airflow. The inclined portion 72 and the rear wall 62 are separated, meaning that the inclined portion 72 and the rear wall 62 are not connected and a gap is formed for airflow.

[0145] Driven by the first fan 90, the airflow inside the housing 60 can flow towards the front wall 61 from the outlet side of the first vent 711, then change direction to flow towards the left wall 63, and then change direction again to flow towards the rear wall 62. After passing through the electrical components 80, the airflow enters the first air inlet channel 501 and is then blown out from the outlet side of the first vent 711.

[0146] The inclined portion 72 is connected to the end of the main body 71 away from the right wall 64. Relative to the main body 71, the inclined portion 72 is inclined in a direction away from the rear wall 62. The inclined portion 72 can guide airflow towards the front wall 61, and then the airflow flows through the electrical component 80 before returning to the first air inlet channel 501, reducing the possibility of airflow directly entering the first air inlet channel 501 without passing through the electrical component 80.

[0147] In some feasible ways, the obtuse angle D is 130° to 170°, which helps to improve the obstruction effect of the inclined part 72 on the airflow, reduces the possibility that the airflow will flow back directly to the first air inlet channel 501 after being discharged from the air outlet side of the first vent 711, and enables the inclined part 72 to effectively guide the airflow toward the front wall 61.

[0148] In some examples, the obtuse angle D is one of 130°, 140°, 150°, 160°, or 170°.

[0149] In some examples, the connection between the main body 71 and the right wall 64 includes, but is not limited to, adhesive connection, welding connection or abutment connection, which helps to block airflow from flowing between the main body 71 and the right wall 64 and reduce the possibility of noise caused by airflow flowing between the main body 71 and the right wall 64.

[0150] See also some of the possible implementation methods. Figure 9 As shown, the inclined portion 72 and the left wall 63 are separated, and a gap 200 for air to pass through is formed between the inclined portion 72 and the left wall 63.

[0151] See in some examples Figure 5 , Figure 8 and Figure 9 As shown, the first air inlet channel 501 includes a first sub-channel 5011 and a second sub-channel 5012 that are connected to each other. The main body 71 and the rear wall 62 form the first sub-channel 5011. Along the air inlet direction S1 of the first air inlet channel 501, the first sub-channel 5011 gradually decreases in size.

[0152] Along the air intake direction S1 of the first air intake channel 501, when the airflow flows in the first sub-channel 5011, the airflow velocity increases, which is conducive to the rapid flow of air in the first sub-channel 5011, and makes it easier for the airflow outside the first sub-channel 5011 to enter the first sub-channel 5011 and then be discharged through the first vent 711.

[0153] For example, the main body 71 is a flat portion. The main body 71 is inclined relative to the rear wall 62. The larger end of the first sub-channel 5011 is away from the right wall 64, and the smaller end is close to the right wall 64.

[0154] In some examples, the inclined portion 72 and the rear wall 62 form a second sub-channel 5012. Along the airflow direction S1 of the first air inlet channel 501, the second sub-channel 5012 gradually narrows. After passing through the second sub-channel 5012, the airflow directly enters the first sub-channel 5011.

[0155] Along the air intake direction S1 of the first air intake channel 501, when the airflow flows within the second sub-channel 5012, the airflow velocity increases, which facilitates rapid airflow within the second sub-channel 5012 and makes it relatively easy for airflow outside the second sub-channel 5012 to enter it. The second sub-channel 5012 can provide a first-stage acceleration effect on the airflow, while the first sub-channel 5011 can provide a second-stage acceleration effect. After passing through the various electrical components 80, the airflow smoothly returns to the second sub-channel 5012 and the first sub-channel 5011, which helps improve the airflow circulation effect and allows heat to be distributed throughout the entire space within the housing 60, improving the heat dissipation effect and efficiency of the housing 60.

[0156] For example, the larger end of the second sub-channel 5012 is away from the right wall 64, and the smaller end is close to the right wall 64.

[0157] For example, both the main body 71 and the inclined plate are plate-shaped structures.

[0158] See also some of the possible implementation methods. Figure 5 , Figure 8 and Figure 9 As shown, a first fan 90 is disposed on the main body 71. The first fan 90 is disposed corresponding to the first vent 711 and is located on the air inlet side of the first vent 711. The first fan 90 faces the first vent 711.

[0159] The first fan 90 is located inside the first air inlet channel 501. The first fan 90 can reuse the first air inlet channel 501, reducing the space occupied by the first fan 90 within the housing 60 for installing electrical components 80, improving the space utilization within the housing 60, and reducing the difficulty of arranging the first fan 90 and electrical components 80.

[0160] In some examples, the first fan 90 is detachably connected to the main body 71. For example, the first fan 90 can be connected to the main body 71 by fasteners such as screws, or the first fan 90 can be snapped onto the main body 71.

[0161] In some examples, the main body 71 is provided with two first vents 711 and two first fans 90. The two first fans 90 can enhance the airflow driving force and improve the airflow circulation efficiency. The two first fans 90 are redundantly configured; if one first fan 90 fails and cannot be used, the other first fan 90 can still work normally to achieve turbulence, reducing the possibility of disassembling and repairing the electrical device 50. For example, the two first fans 90 are arranged adjacent to each other along a first direction X. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0162] See also some of the possible implementation methods. Figure 5 and Figure 8 As shown, electrical component 80 includes auxiliary power supply 81. Along the third direction Z, auxiliary power supply 81 is arranged adjacent to the first fan 90 and located on the air outlet side of the first vent 711.

[0163] The auxiliary power supply 81 is relatively sensitive to temperature. The airflow on the outlet side of the first vent 711 has a relatively low temperature and a relatively fast flow rate, which allows the airflow to dissipate the heat around the auxiliary power supply 81, reducing the possibility of heat accumulation around the auxiliary power supply 81 and causing the temperature of the auxiliary power supply 81 to be too high, so that the temperature-sensitive auxiliary power supply 81 can work stably.

[0164] See also some of the possible implementation methods. Figure 5 and Figure 8 As shown, the housing 60 includes a left wall 63 and a right wall 64 spaced apart along the second direction Y. The third direction Z is perpendicular to the second direction Y.

[0165] In some possible implementations, electrical component 80 includes a DC conversion assembly 82. The DC conversion assembly 82 includes a fuse 821. Along the second direction Y, the distance between the fuse 821 and the left wall 63 is less than the distance between the fuse 821 and the right wall 64. The fuse 821 is positioned closer to the left wall 63 relative to the right wall 64.

[0166] The fuse 821 is located in the gas circulation path within the housing 60. Airflow from the outlet side of the first vent 711 flows towards the front wall 61, then changes direction upon obstruction, flowing towards the left wall 63, and then changes direction again upon obstruction, flowing towards the rear wall 62. As the airflow flows towards the rear wall 62, it passes through the fuse 821.

[0167] The fuse 821 itself generates relatively a large amount of heat. The airflow velocity is relatively fast in the areas near the front wall 61 and the left wall 63. The way the fuse 821 is positioned close to the left wall 63 allows the airflow to dissipate heat more quickly, reducing the possibility of heat accumulation around the fuse 821 and causing the fuse 821 to overheat. This ensures that the fuse 821 can operate stably and reduces the possibility of false alarms due to improper heat dissipation of the fuse 821.

[0168] In some examples, the DC conversion assembly 82 includes a wiring section located outside the front wall 61. The wiring section of the DC conversion assembly 82 is configured to connect to a device (e.g., battery device 30, power converter 40) outside the electrical device 50.

[0169] See in some examples Figure 5 and Figure 8 As shown, electrical component 80 includes AC conversion assembly 83. AC conversion assembly 83 includes conductive sheet 831. Conductive sheet 831 is located on the air outlet side of first vent 711. Along the third direction Z, conductive sheet 831 is located between isolator 70 and front wall 61.

[0170] The conductive sheet 831 of the AC conversion component 83 transmits AC power. The conductive sheet 831 itself generates relatively a lot of heat. The airflow on the outlet side of the first vent 711 has a relatively low temperature and a relatively fast flow rate, which allows the airflow to disperse the heat around the conductive sheet 831, reducing the possibility of heat accumulation around the conductive sheet 831 and causing the conductive sheet 831 to overheat, thus enabling the AC conversion component 83 to operate stably and normally.

[0171] In some examples, the conductive sheet 831 can be a copper busbar.

[0172] In some examples, the AC conversion assembly 83 includes a wiring section located outside the front wall 61. The wiring section of the AC conversion assembly 83 is configured to connect to an external device. For example, the external device may include a power converter 40, a power grid, or a load.

[0173] In some possible implementations, the housing 60 includes a left wall 63 and a right wall 64 spaced apart along a second direction Y, and a top wall 65 and a bottom wall 66 spaced apart along a first direction X. The left wall 63, right wall 64, top wall 65, bottom wall 66, front wall 61, and rear wall 62 are interconnected to form a closed receiving space. The housing 60 has waterproof properties, for example, meeting an IP65 protection rating, so that the housing 60 can protect the electrical components 80 inside the housing 60. The receiving space inside the housing 60 is not connected to the external environment and is an independent space. No heat dissipation openings are provided on the housing 60.

[0174] In some feasible embodiments, both the top wall 65 and the bottom wall 66 are connected to the isolator 70, which helps to block airflow between the isolator 70 and the top wall 65 and between the isolator 70 and the bottom wall 66, thereby reducing the possibility of noise generated by airflow between the isolator 70 and the top wall 65 and between the isolator 70 and the bottom wall 66.

[0175] In some examples, both the top wall 65 and the bottom wall 66 are connected to the main body 71. Exemplarily, the connection methods of the top wall 65 and the bottom wall 66 include, but are not limited to, adhesive connection, welding connection, or abutment connection.

[0176] In some examples, both the top wall 65 and the bottom wall 66 are connected to the inclined portion 72. Exemplarily, the connection methods between the top wall 65 and the bottom wall 66 and the inclined portion 72 include, but are not limited to, adhesive connection, welding connection, or abutment connection.

[0177] See also some of the possible implementation methods. Figure 10 and Figure 11 As shown, the electrical device 50 includes a flow guide 110. The flow guide 110 is disposed outside the housing 60 and connected to the housing 60. A second air inlet channel 502 is formed between the flow guide 110 and the housing 60.

[0178] The airflow guide 110 includes a second vent 1101 that communicates with the second air inlet channel 502. Airflow flows within the second air inlet channel 502. The second fan 100 is configured to drive airflow through the second air inlet channel 502 and the second vent 1101. The second air inlet channel 502 and the second vent 1101 are airflow circulation channels outside the housing 60. The second air inlet channel 502 and the internal space of the housing 60 are independent of each other and are not interconnected.

[0179] See in some examples Figure 11 As shown, the second air inlet channel 502 includes a third sub-channel 5021 and a fourth sub-channel 5022. A guide member 110 is connected to the bottom wall 66, forming the third sub-channel 5021. The guide member 110 is connected to the rear wall 62, forming the fourth sub-channel 5022. The second vent 1101 communicates with the fourth sub-channel 5022.

[0180] See also some of the possible implementation methods. Figure 10 and Figure 11 As shown, the rear wall 62 and the second fan 100 are arranged along the third direction Z, with the second fan 100 located behind the rear wall 62.

[0181] In some feasible implementations, the second fan 100 is located within the fourth sub-channel 5022. This enhances heat dissipation from the rear wall 62.

[0182] In some feasible implementations, the second vent 1101 is an air outlet, and the rear wall 62 and the second vent 1101 are arranged along a third direction Z, with the second vent 1101 located behind the rear wall 62. The air intake direction S2 of the second air intake channel 502 is towards the rear wall 62, and the airflow on the exhaust side of the first vent 711 is towards the front wall 61. The airflow near the front wall 61 in the second air intake channel 502 is cold air, while the airflow near the front wall 61 in the exhaust side of the first vent 711 is hot air. This helps to reduce the temperature of the airflow inside the housing 60 and improves the heat dissipation of the electrical components 80.

[0183] Electrical components 80 are connected and fixed to the bottom wall 66. The heat generated by electrical components 80 can be dissipated relatively quickly through the bottom wall 66, resulting in a relatively high temperature for the bottom wall 66. The way in which the guide member 110 forms a third sub-channel 5021 with the bottom wall 66 allows the third sub-channel 5021 to contact the bottom wall 66 and exchange heat, which helps to improve the heat dissipation efficiency of the housing 60 and enhance the heat dissipation effect.

[0184] The airflow in the fourth sub-channel 5022 can exchange heat with the rear wall 62 of the housing 60, which can reduce the airflow temperature in the first air inlet channel 501 and further improve the heat dissipation of electrical components 80.

[0185] The second fan 100 is located within the fourth sub-channel 5022. The airflow guide 110 can protect the second fan 100, reducing the possibility of structural damage to the second fan 100 due to impact or compression.

[0186] See also some of the possible implementation methods. Figure 11 As shown, the electrical device 50 includes heat exchange fins 120. The heat exchange fins 120 are disposed within the second air inlet channel 502. The heat exchange fins 120 can increase the heat transfer area, enhance the heat transfer process, and improve the heat exchange efficiency between the airflow within the housing 60 and the second air inlet channel 502.

[0187] In some examples, the heat exchange fins 120 may be attached to the bottom wall 66 of the housing 60. Exemplarily, the heat exchange fins 120 may be bonded to the bottom wall 66 with thermally conductive adhesive. Alternatively, the heat exchange fins 120 may be welded to the bottom wall 66.

[0188] In some examples, the second air inlet channel 502 includes a third sub-channel 5021 and a fourth sub-channel 5022. The third sub-channel 5021 has an air inlet near the front wall 61. Heat exchange fins 120 are positioned near the air inlet of the third sub-channel 5021. Exemplarily, along the third direction Z, the size of the heat exchange fins 120 is smaller than the size of the third sub-channel 5021. Alternatively, the heat exchange fins 120 may be disposed throughout the entire third sub-channel 5021.

[0189] In some examples, the material of the heat exchange fins 120 may include, but is not limited to, aluminum or aluminum alloys.

[0190] See also some of the possible implementation methods. Figure 10 and Figure 11 As shown, the flow guide 110 includes a base 1102 and a side portion 1103 connected to the base 1102. The base 1102 is connected to the bottom wall 66 and forms a third sub-channel 5021, and the side portion 1103 is connected to the rear wall 62 and forms a fourth sub-channel 5022. Along the third direction Z, the base 1102 extends beyond the bottom wall 66.

[0191] See also some of the possible implementation methods. Figure 2 and Figure 12 As shown, the cabinet 20 includes a front door panel 203 and a rear door panel 204 spaced apart along a third direction Z. The front door panel 203 includes a first heat dissipation hole 2031, and the rear door panel 204 includes a second heat dissipation hole 2041.

[0192] Airflow with a relatively low external temperature can enter the cabinet 20 through the first heat dissipation hole 2031. The airflow can exchange heat with the electrical device 50 and then exit through the second heat dissipation hole 2041 to dissipate heat from the electrical device 50. The arrangement of the electrical device 50 between the first heat dissipation hole 2031 and the second heat dissipation hole 2041 along the third direction Z helps to improve heat dissipation efficiency.

[0193] Airflow through the first heat dissipation hole 2031 can quickly enter the second air intake channel 502, and airflow discharged from the second vent 1101 can quickly exit from the second heat dissipation hole 2041, which helps to improve the heat dissipation efficiency of the electrical device 50.

[0194] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An energy storage device, characterized in that, include: Cabinet; A battery device is located inside the cabinet, and the battery device includes multiple battery modules; An electrical device includes a housing and a DC conversion component, an AC conversion component, and an auxiliary power supply disposed within the housing, wherein the auxiliary power supply provides electrical energy to the AC conversion component; The power converter is located inside the cabinet but outside the housing. Multiple wiring harnesses are provided, and the electrical device is electrically connected to the battery device via a portion of the wiring harnesses, and the electrical device is electrically connected to the power converter via a portion of the wiring harnesses.

2. The energy storage device according to claim 1, characterized in that, The DC conversion component includes a first wiring section and a third wiring section, and the battery device includes a total positive electrode and a total negative electrode. The wiring harness includes a first positive wiring harness and a first negative wiring harness. The first positive wiring harness is connected to the main positive electrode and the first terminal, and the first negative wiring harness is connected to the main negative electrode and the first terminal.

3. The energy storage device according to claim 2, characterized in that, The AC conversion component includes a second wiring section and a fifth wiring section, wherein the second wiring section is configured to be connected to external AC power of the energy storage device; The power converter includes a fourth wiring section and a sixth wiring section; The wiring harness includes a second positive wire harness, a second negative wire harness, and a third wire harness; The second positive wire harness connects the third terminal and the fourth terminal, and the second positive wire harness transmits DC power. The second negative wire harness connects the third terminal and the fourth terminal, and the second negative wire harness transmits DC power. The third wiring harness connects the fifth terminal and the sixth terminal, and the third wiring harness transmits AC power.

4. The energy storage device according to any one of claims 1 to 3, characterized in that, Along the first direction, the battery device, the electrical device, and the power converter are arranged sequentially.

5. The energy storage device according to claim 4, characterized in that, The cabinet includes a first side panel and a second side panel arranged opposite to each other along a second direction, wherein the first direction is perpendicular to the second direction. The battery device includes a total positive electrode and a total negative electrode. Along the second direction, the distance between the total positive electrode and the first side plate is less than the distance between the total positive electrode and the second side plate, and the distance between the total negative electrode and the first side plate is less than the distance between the total negative electrode and the second side plate.

6. The energy storage device according to claim 5, characterized in that, The battery module includes a positive electrode and a negative electrode. Along the second direction, the distance between the positive electrode and the first side plate is less than the distance between the positive electrode and the second side plate, and the distance between the negative electrode and the first side plate is less than the distance between the negative electrode and the second side plate. The wiring harness includes a fourth wiring harness, through which the positive and negative terminals of adjacent battery modules are connected.

7. The energy storage device according to claim 3, characterized in that, The electrical device includes a shielding member, which is connected to the housing to form a first chamber. The first wiring section, the second wiring section, the third wiring section, and the fifth wiring section are all located in the first cavity.

8. The energy storage device according to claim 7, characterized in that, At least one of the shielding member and the housing is provided with a through hole, the through hole communicating with the first chamber, and the first wiring portion and the third wiring portion are arranged facing the through hole; The cabinet includes a first side panel and a second side panel arranged opposite to each other along a second direction, and the through hole is provided facing the first side panel.

9. The energy storage device according to any one of claims 1 to 8, characterized in that, The auxiliary power supply includes a DC auxiliary power supply, which is connected to the DC conversion component and obtains power from the DC conversion component. The DC auxiliary power supply provides power to the AC conversion component.

10. The energy storage device according to any one of claims 1 to 9, characterized in that, The auxiliary power supply includes an AC auxiliary power supply, which is connected to the AC conversion component. The AC auxiliary power supply is configured to obtain electrical energy from outside the energy storage device and provide electrical energy to the AC conversion component.

11. The energy storage device according to any one of claims 1 to 10, characterized in that, The housing includes a front wall and a rear wall spaced apart along a third direction; The electrical device includes: An isolation component is disposed within and connected to the housing. The isolation component includes a main body and an inclined portion. The main body is provided with a first vent. The included angle between the main body and the inclined portion is an obtuse angle, and the obtuse angle is located on the air outlet side of the first vent. The first air inlet channel is located between the isolation component and the rear wall, and is connected to the first ventilation opening; The auxiliary power supply is located on the air outlet side of the first vent. A first fan is disposed within the housing and is configured to drive air through the first vent and the first air intake channel.

12. The energy storage device according to claim 11, characterized in that, The electrical device includes a second fan disposed outside the housing, the second fan being configured to dissipate heat from the housing.

13. The energy storage device according to claim 11 or 12, characterized in that, The housing includes a left wall and a right wall spaced apart along a second direction, wherein the third direction is perpendicular to the second direction; A gap for air passage is provided between the inclined portion and the left wall, the main body is connected to the right wall, the inclined portion is separated from the rear wall, and the obtuse angle is 130° to 170°.

14. The energy storage device according to claim 13, characterized in that, The inclined portion and the left wall are separated.

15. The energy storage device according to any one of claims 11 to 14, characterized in that, The first air inlet channel includes a first sub-channel and a second sub-channel. The main body and the rear wall form the first sub-channel. Along the air inlet direction of the first air inlet channel, the first sub-channel gradually becomes smaller. The inclined portion and the rear wall form the second sub-channel, which gradually decreases in size along the air intake direction of the first air intake channel.

16. The energy storage device according to any one of claims 11 to 15, characterized in that, The housing includes a left wall and a right wall spaced apart along a second direction, wherein the third direction is perpendicular to the second direction; The DC conversion assembly includes a fuse, and along the second direction, the distance between the fuse and the left wall is less than the distance between the fuse and the right wall.

17. The energy storage device according to any one of claims 11 to 16, characterized in that, The housing includes a left wall and a right wall spaced apart along a second direction, and a top wall and a bottom wall spaced apart along a first direction; The left wall, the right wall, the top wall, the bottom wall, the front wall, and the rear wall are interconnected and form a closed receiving space.

18. The energy storage device according to any one of claims 11 to 17, characterized in that, The electrical device includes a flow guide, which is disposed outside the housing and connected to the housing, forming a second air inlet channel between the flow guide and the housing. The air guide includes a second vent that communicates with the second air intake channel, and the electrical device includes a second fan configured to drive air through the second air intake channel and the second vent.

19. The energy storage device according to claim 18, characterized in that, The housing includes a top wall and a bottom wall spaced apart along a first direction, wherein the third direction is perpendicular to the first direction. The second air inlet channel includes a third sub-channel and a fourth sub-channel. The guide member is connected to the bottom wall and forms the third sub-channel. The guide member is connected to the rear wall and forms the fourth sub-channel. The second fan is located on the rear side of the rear wall. The second vent is an air outlet and is located on the rear side of the rear wall.

20. The energy storage device according to claim 19, characterized in that, The flow guide includes a base and a side portion connected to the base. The base is connected to the bottom wall and forms the third sub-channel, and the side portion is connected to the rear wall and forms the fourth sub-channel. Along the third direction, the base extends beyond the bottom wall.

21. The energy storage device according to any one of claims 1 to 20, characterized in that, The cabinet includes a front door panel and a rear door panel spaced apart along a third direction. The front door panel includes a first heat dissipation hole, and the rear door panel includes a second heat dissipation hole.

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