Energy storage device

Abstract

An energy storage device, comprising a cabinet body (1), a battery pack (2), a charging converter (3), a charging connector (4), a cooling system (5), and a first heat dissipation device (6). The battery pack (2) is mounted in the cabinet body (1). The charging converter (3) is electrically connected to the battery pack (1). The charging connector (4) is electrically connected to the charging converter (3) so as to transmit electric energy converted by the charging converter. A cooling flow channel of the charging connector (4) and a cooling flow channel of the charging converter (3) are arranged in the cooling system (5). The first heat dissipation device (6) is at least partially arranged in the cooling system (5) so as to cool the charging connector (4) and the charging converter (3). A fan (7) performs heat dissipation on the first heat dissipation device (6) so as to cool the charging converter (3) and the charging connector (5). Therefore, the first heat dissipation device (6) corresponding to the cooling system (5) can be fully used to perform heat dissipation on the charging converter (3) and the charging connector (4) together.

Description

Energy storage device

[0001] Cross-reference to Related Applications

[0002] The present disclosure is based on and claims priority to Chinese Patent Application No. 202421713576.8, filed on July 19, 2024, entitled “Energy storage device”, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of batteries, in particular to an energy storage device. BACKGROUND

[0004] New energy batteries are increasingly widely used in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also increasingly used in the field of energy storage and the like. The battery pack is arranged in the energy storage device to charge the electric equipment such as new energy vehicles through the charging connector. The charging converter and the charging connector in the energy storage device will generate heat and need to be cooled to a certain extent.

[0005] In related technologies, the structure for cooling the charging converter and the charging connector is difficult to fully utilize the corresponding heat dissipation device. SUMMARY

[0006] Therefore, the embodiments of the present disclosure aim to provide an energy storage device, which aims to fully utilize the structure for cooling the charging converter and the charging connector.

[0007] To achieve the above-mentioned purpose, the technical solutions of the embodiments of the present disclosure are as follows:

[0008] The first aspect of the embodiments of the present disclosure provides an energy storage device, comprising:

[0009] a cabinet body;

[0010] a battery pack installed in the cabinet body;

[0011] a charging converter electrically connected with the battery pack, the charging converter being used to convert the electrical energy output or input by the battery pack;

[0012] a charging connector electrically connected with the charging converter to transmit the electrical energy converted by the charging converter;

[0013] a cooling system used to exchange heat with the charging converter and the charging connector;

[0014] a first heat dissipation device arranged in the cooling system;

[0015] at least one fan installed in the cabinet body, the fan being used to dissipate heat from the first heat dissipation device.

[0016] In the scheme of the embodiment of the present disclosure, the cooling flow channel of the charging current transformer and the cooling flow channel of the charging connector are arranged in the cooling system, so that the cooling flow channel of the charging current transformer and the cooling flow channel of the charging connector are in the same cooling system, the first heat dissipation device corresponding to the cooling system is arranged in the first cooling system, and the first heat dissipation device is cooled by the fan to cool the charging current transformer and the charging connector. In the process of charging the electrical equipment through the charging connector, since the cooling flow channel of the charging current transformer and the cooling flow channel of the charging connector are in the same cooling system, the first heat dissipation device corresponding to the cooling system can be fully utilized to dissipate heat of the charging current transformer and the charging connector. Furthermore, in the actual application scenario, the charging current transformer and the charging connector have slightly different but relatively close temperature requirements for the temperature of the temperature regulating medium, so in the same cooling system, the first heat dissipation device and the cooling system can better dissipate heat of the two relatively close temperature requirements of the temperature regulating medium.

[0017] In an embodiment, the energy storage device further includes a first circulating pump, and the cooling system includes:

[0018] a first circulating loop, the first circulating pump and the cooling flow channel of the charging current transformer are all connected in series in the first circulating loop;

[0019] a sub-cooling system, the cooling flow channel of the charging connector is arranged in the sub-cooling system, the sub-cooling system includes a first pipeline, the first pipeline is connected in series with the first circulating pump, the first pipeline is connected in parallel with the cooling flow channel of the charging current transformer, and the first heat dissipation device is arranged in at least one of the first circulating loop and the sub-cooling system to cool the charging connector and the charging current transformer.

[0020] In the scheme of the embodiment of the present disclosure, the energy storage device further includes a first circulating pump, the cooling system includes a first circulating loop and a sub-cooling system, the sub-cooling system includes a first pipeline, the charging current transformer is arranged in the first circulating loop, and the first heat dissipation device is arranged in at least one of the first circulating loop and the sub-cooling system. The charging current transformer and the charging connector are arranged on different pipelines, so that the arrangement of the cooling system can be facilitated, and the arrangement of the first circulating loop and the sub-cooling system can be not limited by the relative positions of the charging current transformer and the charging connector. After the first circulating loop and the sub-cooling system are arranged, the first heat dissipation device can cool the charging connector and the charging current transformer. Furthermore, since the cooling temperatures of the charging connector and the charging current transformer are different, the sub-cooling system and the first circulating loop can adjust the flow rates of different temperature regulating media to meet different cooling requirements.

[0021] In an embodiment, the sub-cooling system further includes:

[0022] a first heat exchanger, one of the heat exchange flow channels of the first heat exchanger is arranged in the first pipeline;

[0023] a second circulating pump;

[0024] The second circulating loop, the cooling flow channel of the charging connector, the second circulating pump and the other heat exchange flow channel of the first heat exchanger are connected in series in the second circulating loop, the second circulating loop is isolated from the first pipeline, and the first heat dissipation device is arranged in at least one of the first circulating loop, the heat exchange flow channel of the first heat exchanger and the second circulating loop.

[0025] In the scheme of the embodiment of the present disclosure, one of the heat exchange flow channels of the first heat exchanger is arranged in the first pipeline, and the other heat exchange flow channel is connected in series in the second circulating loop, and the first pipeline and the second circulating loop are isolated from each other. The first circulating loop and the second circulating loop can correspondingly set different temperature adjustment mediums according to the characteristics of the charging converter and the charging connector, thereby increasing the adaptability of the energy storage device and providing a better experience for the user.

[0026] In an embodiment, the temperature adjustment medium in the first circulating loop is water, and the temperature adjustment medium in the second circulating loop is oil.

[0027] In the scheme of the embodiment of the present disclosure, the temperature adjustment medium in the first circulating loop is water, the cooling capacity required by the charging converter is higher, the specific heat capacity of water is larger, and the charging converter can be better cooled to better meet the cooling requirements of the charging converter. The temperature adjustment medium in the second circulating loop is oil, the oil has the performance of being difficult to conduct electricity, the energy storage device needs to be discharged through the charging connector, and in the process of cooling the charging connector, the risk of electric shock or short circuit caused by leakage of the temperature adjustment medium is alleviated, and the energy storage device is safer.

[0028] In an embodiment, the cooling flow channel of the first heat dissipation device is arranged in the first circulating loop, and the cooling flow channel of the first pipeline and the charging converter are connected in series with the corresponding cooling flow channel of the first heat dissipation device.

[0029] In the scheme of the embodiment of the present disclosure, the cooling flow channel of the first pipeline and the cooling flow channel of the charging converter are connected in series with the corresponding cooling flow channel of the first heat dissipation device. In the process of cooling the charging connector, the first circulating pump needs to be started to make the temperature adjustment medium flow in the first circulating loop, thereby providing power for cooling the charging converter, and the first heat dissipation device can cool the charging connector and the charging converter together.

[0030] In an embodiment, the first heat dissipation device is a cooling container for containing the temperature adjustment medium, the space in the cooling container for containing the temperature adjustment medium is arranged in the cooling system, and the fan is used to drive air to flow through the first heat dissipation device to dissipate heat from the first heat dissipation device.

[0031] In the scheme of the embodiment of the present disclosure, the first heat dissipation device is a cooling container for containing temperature regulating medium, and the fan is used for blowing air to the cooling container. In an actual use scenario, the temperature requirement of the charging converter and the charging connector for the temperature regulating medium is higher than the ambient temperature, and the cooling capacity requirement of the charging converter and the charging connector is weaker, and the cooling requirement of the charging converter and the charging connector can be better met by the fan, and the manufacturing cost of the energy storage device is lower.

[0032] In an embodiment, the cooling container is located above the battery pack.

[0033] In the scheme of the embodiment of the present disclosure, the battery pack generates a large amount of heat during operation, and the battery pack has a large heat dissipation requirement, and the temperature regulating medium can transfer the heat of the charging converter and the charging connector to the cooling container. Hot air usually floats upwards, and the cooling container located above the battery pack can alleviate the transfer of heat from the cooling container to the battery pack, so as to increase the heat dissipation capacity of the battery pack to a certain extent.

[0034] In an embodiment, the cooling container is located above the fan.

[0035] In the scheme of the embodiment of the present disclosure, the cooling container is located above the fan, the fan blows air upwards, and the generated wind acts on the cooling container, which can remove the heat of the cooling container upwards, and the heat dissipation effect is good. If the cooling container is placed below the fan, the fan blows air downwards, and the generated wind carrying the heat generated by the cooling container moves downwards for a distance and then moves upwards, so as to act on the cooling container again, and the heat dissipation effect is poor.

[0036] In an embodiment, the charging converter is a direct current converter.

[0037] In the scheme of the embodiment of the present disclosure, the current output by the battery pack can adjust the parameters of the current through the direct current converter, so as to adapt to the parameters of the input current of more electric equipment. The adaptability of the energy storage device is higher.

[0038] In an embodiment, the charging converter is located inside the cabinet.

[0039] In the scheme of the embodiment of the present disclosure, the charging converter located inside the cabinet can alleviate the influence of the charging converter on the external environment, and is more convenient in the process of transferring the energy storage device.

[0040] Inventive effect:

[0041] In this embodiment of the scheme, the cooling channels of the charging converter and the charging connector are both located in the cooling system, making them part of the same cooling system. A first heat dissipation device corresponding to the cooling system is located in the first cooling system, and a fan dissipates heat from the first heat dissipation device to cool the charging converter and the charging connector. During the charging of the electrical equipment through the charging connector, since the cooling channels of the charging converter and the charging connector are in the same cooling system, the first heat dissipation device corresponding to the cooling system can be fully utilized to dissipate heat from both the charging converter and the charging connector. Furthermore, in practical applications, the temperature requirements of the temperature-regulating medium for the charging converter and the charging connector are slightly different but relatively close. Therefore, within the same cooling system, the first heat dissipation device and the cooling system can effectively dissipate heat from the two relatively similar temperature requirements of the temperature-regulating medium. Attached Figure Description

[0042] 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 disclosure. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0043] Figure 1 is a simplified structural diagram of an energy storage device according to a first embodiment of this disclosure;

[0044] Figure 2 is a simplified structural diagram of the energy storage device according to the second embodiment of this disclosure;

[0045] Figure 3 is a simplified structural diagram of an energy storage device according to a third embodiment of this disclosure;

[0046] Figure 4 is a structural schematic diagram of the energy storage device according to the fourth embodiment of this disclosure.

[0047] Explanation of reference numerals in the attached drawings: 1. Cabinet; 2. Battery pack; 3. Charging converter; 4. Charging connector; 5. Cooling system; 50. First circulation loop; 51. Sub-cooling system; 510. First pipeline; 511. Second circulation loop; 512. First heat exchanger; 513. Second circulation pump; 6. First heat dissipation device; 60. Cooling container; 61. Fan; 7. First circulation pump; 8. Temperature control system; 800. Third circulation loop; 81. Second heat exchanger; 9. Second heat dissipation device; 10. Third circulation pump. Detailed Implementation

[0048] The embodiments of the technical solutions disclosed herein will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solutions disclosed herein and are therefore intended to limit the scope of protection of this disclosure.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure; the terms “comprising” and “having”, and any variations thereof, in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0050] In the description of the embodiments of this disclosure, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary or secondary relationship of the indicated technical features. In the description of the embodiments of this disclosure, "a plurality of" means two or more, unless otherwise explicitly defined.

[0051] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0052] In the description of the embodiments of this disclosure, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0053] In the description of the embodiments of this disclosure, the technical terms "top," "bottom," "upper," "lower," 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 disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated, or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this disclosure.

[0054] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0055] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0056] In related technologies, the battery pack of an energy storage device supplies power to a charging connector via a charging converter, enabling the charging connector to power electrical devices such as electric vehicles. The cooling channels for the charging converter and the charging connector are located in two independent cooling systems. These two independent cooling systems are thermally separated; that is, there is no heat exchanger between them, and heat exchange cannot occur between them. During charging via the charging connector, the cooling devices of each of the two independent cooling systems must separately dissipate heat from the charging converter and the charging connector, making it difficult to fully utilize the cooling devices of just one cooling system to achieve common cooling for both the charging connector and the charging converter.

[0057] In the embodiments of this disclosure, the cooling system 5 is used to cool the charging inverter 3 and the charging connector 4. Specifically, the cooling channels for the charging inverter 3 and the charging connector 4 are located within the same cooling system. The cooling system 5 and the corresponding first heat dissipation device 6 cool the charging inverter 3 and the charging connector 4. By using the first heat dissipation device 6 corresponding to the cooling system 5 to cool the charging inverter 3 and the charging connector 4, sufficient heat dissipation can be achieved for both during the charging process.

[0058] Battery pack 2 refers to a device capable of outputting electrical energy. For example, electrical energy can be output from battery pack 2, which consists of individual battery cells. Alternatively, electrical energy can be output from battery pack 2, which consists of battery modules composed of individual battery cells.

[0059] This disclosure also provides a battery pack 2, which includes a mounting housing and battery units disposed inside the mounting housing.

[0060] In this embodiment of the disclosure, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0061] In this embodiment of the disclosure, the battery cell can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and this embodiment of the disclosure is not limited to this.

[0062] For example, a battery cell includes a housing and an electrode assembly disposed within the housing.

[0063] In some embodiments, the housing can be a sealed structure or a non-sealed structure. As an example, when the housing is a non-sealed structure, the housing serves to protect the electrode assembly, and a sealing bag is included between the housing and the electrode assembly to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating component or an aluminum-plastic film.

[0064] This disclosure also provides an energy storage device, as shown in Figures 1 to 4. The energy storage device includes a cabinet 1, a battery pack 2, a charging converter 3, a charging connector 4, a cooling system 5, a first heat dissipation device 6, and at least one fan 61. The battery pack 2 is installed inside the cabinet 1. The charging converter 3 is electrically connected to the battery pack 2 and is used to convert the electrical energy output or input of the battery pack 2. The charging connector 4 is electrically connected to the charging converter 3 to transmit the electrical energy converted by the charging converter 3. The cooling system 5 is used for heat exchange with the charging converter 3 and the charging connector 4. The first heat dissipation device 6 is disposed in the cooling system 5. The fan 61 is installed in the cabinet 1 and is used to dissipate heat from the first heat dissipation device 6.

[0065] For example, the cooling channels of the charging connector 4 and the charging converter 3 are both provided in the cooling system 5.

[0066] The charging converter 3 refers to the converter that is electrically connected between the battery pack 2 and the charging connector 4, and is used to convert the electrical energy output or input of the battery pack 2.

[0067] An inverter is an electrical device that changes the voltage, frequency, number of phases, and other electrical quantities or characteristics of a power supply system. Charging connector 4 is an electrical device used for electrical connection to electrical equipment, enabling the transfer of electrical energy from the battery pack 2 to the equipment.

[0068] For example, the charging connector 4 is a charging gun.

[0069] For example, the charging connector 4 is a structure used to charge new energy vehicles.

[0070] For example, the energy storage device is a new energy charging pile.

[0071] It should be noted that cooling system 5 is a regulating system with cooling function.

[0072] It should be noted that the different control systems are thermally separated, meaning that there is no heat exchange between the different control systems, and the heat exchangers are not installed between the two different control systems.

[0073] It should be noted that within the same control system, when the flow channels within the system are interconnected, the temperature-regulating medium can circulate to each flow channel. Conversely, when there are isolated flow channels within the same system, these isolated flow channels are housed in heat exchangers, which span across these isolated flow channels. The temperature-regulating medium within these isolated flow channels can then exchange heat through the heat exchangers. In other words, within the same control system, either the cooling flow channels are interconnected, or if isolated flow channels exist, heat exchange occurs through a heat exchanger.

[0074] It should be explained that in two isolated flow channels, the temperature-regulating medium in one flow channel will not flow to the other isolated flow channel.

[0075] It should be explained that a heat exchanger is a structure that enables heat exchange between different, isolated flow channels.

[0076] For example, temperature and pressure sensors are provided on the cooling channels of both the charging inverter 3 and the charging connector 4.

[0077] For example, at an ambient temperature of approximately 45°C, the maximum allowable temperature of the temperature regulating medium of the charging converter 3 is approximately 63°C to 65°C.

[0078] For example, at an ambient temperature of approximately 45°C, the maximum allowable temperature of the temperature regulating medium of the charging connector 4 is approximately 85°C.

[0079] In this embodiment, the cooling channels of the charging converter 3 and the charging connector 4 are both located in the cooling system 5, placing them within the same system. A first heat dissipation device 6, corresponding to the cooling system 5, is located within the same system. A fan 61 dissipates heat from the first heat dissipation device 6 to cool the charging converter 3 and the charging connector 4. During charging of the device via the charging connector 4, the shared cooling system allows for efficient heat dissipation from both the charging converter 3 and the charging connector 4 by utilizing the first heat dissipation device 6. Furthermore, in practical applications, the temperature requirements of the temperature-regulating medium for the charging converter 3 and the charging connector 4 are slightly different but relatively close. Therefore, within the same cooling system, the first heat dissipation device 6 and the cooling system 5 effectively dissipate heat from the two similar temperature-regulating medium requirements.

[0080] For example, the number of first heat dissipation devices 6 is one.

[0081] In one embodiment, referring to FIG1, the energy storage device further includes a first circulating pump 7, and a cooling system 5 including a first circulating loop 50 and a sub-cooling system 51. The cooling channels of the first circulating pump 7 and the charging converter 3 are both connected in series in the first circulating loop 50. The sub-cooling system 51 includes a first pipe 510, which is connected in series with the first circulating pump 7 and in parallel with the cooling channel of the charging converter 3. A first heat dissipation device 6 is disposed in at least one of the first circulating loop 50 and the sub-cooling system 51 to cool the charging connector 4 and the charging converter 3.

[0082] For example, the first circulation pump 7 is an electronic pump.

[0083] In this embodiment of the scheme, the energy storage device further includes a first circulating pump 7, and the cooling system 5 includes a first circulating loop 50 and a sub-cooling system 51. The sub-cooling system 51 includes a first pipeline 510. The charging converter 3 is disposed in the first circulating loop 50, and the first heat dissipation device 6 is disposed in at least one of the first circulating loop 50 and the sub-cooling system 51. The charging converter 3 and the charging connector 4 are disposed on different pipelines, which facilitates the arrangement of the cooling system 5. The arrangement of the first circulating loop 50 and the sub-cooling system 51 is not limited by the relative positions of the charging converter 3 and the charging connector 4. After the first circulating loop 50 and the sub-cooling system 51 are arranged, the first heat dissipation device 6 can cool the charging connector 4 and the charging converter 3. Furthermore, since the cooling temperatures of the charging connector 4 and the charging converter 3 are different, the sub-cooling system 51 and the first circulating loop 50 can adjust the flow rates of different temperature-regulating media accordingly to meet different cooling requirements.

[0084] It is understood that the embodiments of this disclosure are not limited to the cooling system 5 including the first circulation loop 50 and the sub-cooling system 51, the charging converter 3 being disposed in the first circulation loop 50, and the charging connector 4 being disposed in the sub-cooling system 51. Exemplarily, the cooling channel of the charging connector 4 is disposed in the first pipe 510, and the cooling channel of the charging converter 3 is disposed in the first circulation loop 50.

[0085] In one embodiment, referring to FIG1, the sub-cooling system 51 further includes a first heat exchanger 512, a second circulating pump 513, and a second circulating loop 511. One heat exchange channel of the first heat exchanger 512 is disposed in the first pipeline 510. The cooling channel of the charging connector 4, the second circulating pump 513, and the other heat exchange channel of the first heat exchanger 512 are connected in series in the second circulating loop 511. The second circulating loop 511 is isolated from the first pipeline 510. The first heat dissipation device 6 is disposed in at least one of the first circulating loop 50, the heat exchange channel of the first heat exchanger 512, and the second circulating loop 511.

[0086] For example, the second circulation pump 513 is an electronic pump.

[0087] The first heat exchanger 512 refers to a heat exchanger capable of exchanging heat between the first pipeline 510 and the second circulation loop 511.

[0088] The isolation between the second circulation loop 511 and the first pipeline 510 means that the temperature regulating medium in the first pipeline 510 will not flow into the second circulation loop 511, and the temperature regulating medium in the second circulation loop 511 will not flow into the first pipeline 510.

[0089] For example, the two heat exchange channels of the first heat exchanger are isolated from each other, but can exchange heat with each other.

[0090] In this embodiment of the present disclosure, one heat exchange channel of the first heat exchanger 512 is disposed in the first pipeline 510, and the other heat exchange channel is connected in series in the second circulation loop 511. The first pipeline 510 and the second circulation loop 511 are isolated from each other. The first circulation loop 50 and the second circulation loop 511 can be configured with different temperature regulating media according to the characteristics of the charging converter 3 and the charging connector 4, thereby increasing the adaptability of the energy storage device and improving the user experience.

[0091] It is understood that the embodiments of this disclosure are not limited to the isolation of the first pipeline 510 and the second circulation loop 511. Exemplarily, the second circulation loop 511 is interconnected with the first pipeline 510, and the charging connector 4 and the charging converter 3 are connected in parallel.

[0092] It is understandable that when the second circulation loop 511 is connected to the first pipeline 510, the sub-cooling system 51 does not need to be equipped with a first heat exchanger. The first circulation loop 50 and the second circulation loop 511 can share the first circulation pump 7 to drive the flow of the temperature regulating medium, or multiple circulation pumps can be set to accelerate the flow of the temperature regulating medium.

[0093] In one embodiment, the temperature-regulating medium in the first circulation loop 50 is water; the temperature-regulating medium in the second circulation loop 511 is oil.

[0094] For example, the temperature-regulating medium in the first circulation loop 50 can also be a water-glycol solution.

[0095] For example, the temperature regulating medium in the second circulation loop 511 is silicone oil.

[0096] In this embodiment, the temperature-regulating medium in the first circulation loop 50 is water. Since the charging converter 3 requires high cooling capacity, water, with its large specific heat capacity, effectively cools the charging converter 3, thus meeting its cooling requirements. The temperature-regulating medium in the second circulation loop 511 is oil. Oil has poor electrical conductivity. Since the energy storage device needs to discharge through the charging connector 4, oil is used to cool the charging connector 4, mitigating the risk of electric shock or short circuit due to leakage of the temperature-regulating medium, making the energy storage device safer.

[0097] It is understood that the embodiments of this disclosure are not limited to water as the temperature-regulating medium in the first circulation loop 50 and oil as the temperature-regulating medium in the second circulation loop 511. Exemplarily, the temperature-regulating medium in both the first circulation loop 50 and the second circulation loop 511 is water.

[0098] In one embodiment, referring to FIG1, the cooling channel of the first heat dissipation device 6 is disposed in the first circulation loop 50, and the cooling channels of the first pipeline 510 and the charging converter 3 are connected in series with the corresponding cooling channels of the first heat dissipation device 6.

[0099] In the embodiment of this disclosure, the cooling channels of the first pipeline 510 and the charging converter 3 are connected in series with the corresponding cooling channels of the first heat dissipation device 6. During the cooling process of the charging connector 4, the first circulation pump 7 needs to be started to make the temperature regulating medium flow in the first circulation loop 50, thereby providing power for the cooling of the charging converter 3. The first heat dissipation device 6 can cool the charging connector 4 and the charging converter 3 together.

[0100] It is understood that this disclosure is not limited to the cooling channels of the first pipe 510 and the charging converter 3 being connected in series with the corresponding cooling channels of the first heat dissipation device 6. Exemplarily, the cooling channels of the first pipe 510 and the charging converter 3 are isolated from the corresponding cooling channels of the first heat dissipation device 6.

[0101] In one embodiment, referring to FIG1, the first heat dissipation device 6 is a cooling container 60 for containing a temperature regulating medium. The space inside the cooling container 60 for containing the temperature regulating medium is provided in the cooling system 5. The fan 61 is used to drive air to flow through the first heat dissipation device 6 to dissipate heat from the first heat dissipation device 6.

[0102] For example, when the first heat dissipation device 6 is installed in the first circulation loop 50, the cooling container 60 is connected in series with the first circulation loop 50, and the temperature regulating medium in the cooling container 60 is water. When the first heat dissipation device 6 is installed in the second circulation loop 511, the cooling container 60 is connected in series with the second circulation loop 511, and the temperature regulating medium in the cooling container 60 is oil.

[0103] It is understood that this disclosure does not limit the relationship between the cooling container 60 and the cabinet 1. The cooling container 60 can be installed inside the cabinet 1 or outside the cabinet 1, and the temperature regulating medium can flow to the cooling container 60 through the circulation loop of the first heat dissipation device 6.

[0104] In the embodiments of this disclosure, the first heat dissipation device 6 is a cooling container 60 for containing the temperature-regulating medium, and the fan 61 is used to blow air onto the cooling container 60. In practical applications, the charging converter 3 and the charging connector 4 require a higher temperature for the temperature-regulating medium than the ambient temperature, and their cooling capacity requirements are relatively low. By using the fan 61 to drive air from the surrounding environment to flow through the cooling container 60 for air cooling, the cooling requirements of the charging connector 4 and the charging converter 3 can be basically met, resulting in lower manufacturing costs for the energy storage device.

[0105] It is understood that the embodiments of this disclosure are not limited to the first heat dissipation device 6 being a cooling container 60 for containing a temperature-regulating medium. Exemplarily, the first heat dissipation device 6 is a refrigerator.

[0106] In one embodiment, the cooling container 60 is located above the battery pack 2.

[0107] In the embodiments of this disclosure, the battery pack 2 generates a large amount of heat during operation, and has a significant heat dissipation requirement. The temperature regulating medium carries the heat from the charging inverter 3 and the charging connector 4 to the cooling container 60. Hot air typically rises, and the cooling container 60, located above the battery pack 2, can alleviate the transfer of heat from the cooling container 60 to the battery pack 2, thus increasing the heat dissipation capacity of the battery pack 2 to a certain extent.

[0108] It is understood that the embodiments of this disclosure are not limited to the cooling container 60 being located above the battery pack 2. Exemplarily, the cooling container 60 is located below the battery pack 2.

[0109] In one embodiment, the cooling container 60 is located above the fan 61.

[0110] In this embodiment of the present disclosure, the cooling container 60 is located above the fan 61. The fan 61 blows air upwards, and the resulting airflow acts on the cooling container 60, effectively dissipating the heat from the cooling container 60 upwards, resulting in better heat dissipation. If the cooling container 60 is placed below the fan 61, the fan 61 blows air downwards, and the resulting airflow carries the heat generated by the cooling container 60 downwards for a certain distance before moving upwards again, thus acting on the cooling container 60 again, resulting in poorer heat dissipation.

[0111] It is understood that the embodiments of this disclosure are not limited to the cooling container 60 being located above the fan 61. Exemplarily, the cooling container 60 is located below or to the side of the fan 61.

[0112] In one embodiment, referring to Figure 1, the charging inverter 3 is located inside the cabinet 1.

[0113] In the embodiment of this disclosure, the charging converter 3 is located inside the cabinet 1, which can alleviate the influence of the external environment on the charging converter 3 and make it more convenient to transfer the energy storage device.

[0114] It is understood that the embodiments of this disclosure are not limited to the charging inverter 3 being located inside the cabinet 1. Exemplarily, the charging inverter 3 is located outside the cabinet 1.

[0115] In one embodiment, the charging connector 4 is partially located outside the cabinet 1.

[0116] In the embodiments of this disclosure, the charging connector 4 is partially located outside the cabinet 1, which allows the user to easily move the charging connector 4 to charge the electrical equipment.

[0117] In one embodiment, the charging converter 3 is a DC converter.

[0118] A DC converter is a converter whose input current and output current are both direct current.

[0119] In the embodiments of this disclosure, since most new energy vehicles and other electrical devices currently use direct current for charging, the current output by the battery pack 2 can be adjusted through a DC converter to adapt to the input current parameters of various electrical devices. This results in high adaptability of the energy storage device.

[0120] In one embodiment, referring to Figures 1 and 2, the energy storage device further includes a temperature control system 8 and a second heat dissipation device 9. The temperature control channel of the battery pack 2 is disposed in the temperature control system 8, and the temperature control system 8 is thermally separated from the cooling system 5. The second heat dissipation device 9 is at least partially disposed in the temperature control system 8 to cool the battery pack 2.

[0121] It should be noted that the temperature control system 8 is a regulating system with both cooling and heating functions.

[0122] The thermal separation of the temperature control system 8 and the cooling system 5 means that the temperature control medium in the temperature control system 8 will not flow into the cooling system 5, and the temperature control medium in the cooling system 5 will not flow into the temperature control system 8, and no heat exchanger will be installed in the cooling system 5 and the temperature control system 8 for heat exchange.

[0123] For example, the temperature control channel of battery pack 2 is provided with a temperature and pressure sensor.

[0124] In the embodiments of this disclosure, the temperature requirements of the temperature regulating medium for the charging inverter 3 and the charging connector 4 are different from those for the temperature regulating medium for the battery pack 2. Using the temperature regulating system 8 and the second heat dissipation device 9 to regulate the temperature of the battery pack 2 enables the energy storage device to better meet the temperature requirements of the battery pack 2, while having minimal impact on the cooling of the charging inverter 3 and the charging connector 4.

[0125] It is understood that the embodiments of this disclosure do not limit the cooling method of the battery pack 2. Exemplarily, the temperature regulating channel of the battery pack 2 is provided in the cooling system 5.

[0126] In one embodiment, the second heat dissipation device 9 includes a cooler and a second heat exchanger 81, the second heat exchanger 81 being disposed across the cooler and the temperature control system 8.

[0127] The second heat exchanger 81 refers to a heat exchanger that can exchange heat between the temperature control system 8 and the refrigerator.

[0128] For example, the temperature regulation medium of battery pack 2 requires a temperature of approximately 20°C.

[0129] In the embodiments of this disclosure, the second heat dissipation device 9 includes a cooler and a second heat exchanger 81, which can exchange heat between the cooler and the temperature control system 8. Based on the actual operating environment of the battery pack 2, the required temperature of the temperature control medium for the battery pack 2 is lower than the ambient temperature, resulting in a lower cooling temperature for the battery pack 2. Therefore, the cooler can effectively meet the cooling requirements of the battery pack 2.

[0130] It is understood that the embodiments of this disclosure are not limited to the second heat dissipation device 9 including a cooler. Exemplarily, the second heat dissipation device 9 includes a cooling container 60 capable of containing a temperature-regulating medium.

[0131] For example, the temperature control system 8 includes a third circulation loop 800 and a third circulation pump 10, and the heat dissipation channel corresponding to the second heat dissipation device 9, the temperature control channel of the battery pack 2 and the third circulation pump 10 are connected in series in the third circulation loop 800.

[0132] In one embodiment, the refrigerator includes a compressor, a condenser, an evaporator, and an expansion valve connected sequentially. The condenser dissipates heat through a fan, projected along the air outlet direction of the fan 61, and the projected area of ​​the condenser is offset from the projected area of ​​the first heat dissipation device 6. A second heat exchanger is installed across the evaporator and the temperature control system.

[0133] A compressor is a structure in a refrigerant circuit that compresses and drives the refrigerant.

[0134] A condenser is a structure that can convert gas or vapor into liquid and transfer heat from the pipes to the nearby air in a relatively fast manner.

[0135] An evaporator is a structure that utilizes the easy evaporation of a liquid low-temperature refrigerant under low pressure to turn it into steam, and absorbs the heat of the medium being regulated to achieve the purpose of refrigeration.

[0136] An expansion valve is a structure that allows liquid refrigerant to pass through it and become low-temperature, low-pressure wet vapor, which then absorbs heat in the evaporator to achieve a cooling effect.

[0137] The projection area of ​​the condenser and the projection area of ​​the first heat dissipation device 6 are offset from each other, meaning that there is no overlap between the projection area of ​​the condenser and the projection area of ​​the first heat dissipation device 6, but the outlines of the projection areas can overlap.

[0138] In this embodiment, the projection area of ​​the condenser and the projection area of ​​the first heat dissipation device 6 are offset from each other along the air outlet direction of the fan 61. During the airflow driven by the fan 61, the heat generated by the condenser and the first heat dissipation device 6 has minimal interaction, thus increasing the heat dissipation effect of the fan 61 to a certain extent.

[0139] It is understood that the embodiments of this disclosure are not limited to projection along the air outlet direction of the fan 61, and the projection area of ​​the condenser is offset from the projection area of ​​the first heat dissipation device 6. Exemplarily, when projected along the air outlet direction of the fan 61, the projection area of ​​the condenser and the projection area of ​​the first heat dissipation device 6 at least partially overlap.

[0140] The above are merely preferred embodiments of this disclosure and are not intended to limit the scope of this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. An energy storage device, comprising: a cabinet body; a battery pack installed in the cabinet body; a charging converter electrically connected to the battery pack, the charging converter being configured to convert electrical energy outputted or inputted by the battery pack; a charging connector electrically connected to the charging converter to transmit the electrical energy converted by the charging converter; a cooling system configured to exchange heat with the charging converter and the charging connector; a first heat dissipation device disposed in the cooling system; at least one fan installed in the cabinet body, the fan being configured to dissipate heat from the first heat dissipation device.

2. The energy storage device of claim 1, wherein, The energy storage device further comprises a first circulating pump, and the cooling system comprises: a first circulating loop, the first circulating pump and a cooling flow passage of the charging converter being connected in series in the first circulating loop; a sub-cooling system, a cooling flow passage of the charging connector being disposed in the sub-cooling system, the sub-cooling system comprising a first pipeline, the first pipeline being connected in series with the first circulating pump, the first pipeline being connected in parallel with the cooling flow passage of the charging converter, and the first heat dissipation device being disposed in at least one of the first circulating loop and the sub-cooling system to cool the charging connector and the charging converter.

3. The energy storage device of claim 2, wherein, The sub-cooling system further comprises: a first heat exchanger, one heat exchange flow passage of the first heat exchanger being disposed in the first pipeline; a second circulating pump; a second circulating loop, the cooling flow passage of the charging connector, the second circulating pump and another heat exchange flow passage of the first heat exchanger being connected in series in the second circulating loop, the second circulating loop being isolated from the first pipeline, and the first heat dissipation device being disposed in at least one of the first circulating loop, the heat exchange flow passage of the first heat exchanger and the second circulating loop.

4. The energy storage device of claim 3, wherein, The temperature regulating medium in the first circulating loop is water, and the temperature regulating medium in the second circulating loop is oil.

5. The energy storage device according to any one of claims 2 to 4, wherein The cooling flow passage of the first heat dissipation device is disposed in the first circulating loop, and the first pipeline and the cooling flow passage of the charging converter are connected in series with the corresponding cooling flow passage of the first heat dissipation device.

6. The energy storage device according to any one of claims 1 to 5, wherein The first heat dissipation device is a cooling container for containing the temperature regulating medium, a space in the cooling container for containing the temperature regulating medium is disposed in the cooling system, and the fan is configured to drive air to flow through the first heat dissipation device to dissipate heat from the first heat dissipation device.

7. The energy storage device of claim 6, wherein, The cooling container is located above the battery pack.

8. The energy storage device of claim 6 or 7, wherein, The cooling container is located above the fan.

9. The energy storage device according to any one of claims 1 to 8, wherein The charging converter is a direct current converter.

10. The energy storage device according to any one of claims 1 to 9, wherein The charging converter is located inside the cabinet body.

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