Cylindrical distributed micro-storage device and energy storage system

Abstract

The invention provides a cylindrical distributed micro-storage device and an energy storage system, and the distributed micro-storage device comprises an air pipe; the air cooling end of the air cooling part is connected with one end of the air pipe, and the air cooling part is used for forming cooling air on the inner side of the air pipe; the annular frame is arranged on the outer side of the air pipe in a sleeving mode, a plurality of cylindrical battery cells distributed in the circumferential direction of the air pipe at intervals are arranged in the annular frame, and the cylindrical battery cells are arranged in the radial direction of the air pipe; wherein the air pipe is provided with a plurality of hot melting areas, and the pressure relief end of the cylindrical battery cell is opposite to the hot melting areas. According to the cylindrical distributed micro-storage device and the energy storage system disclosed by the invention, a two-in-one combined structure of the air cooling channel and the thermal runaway channel is realized, and airflow of thermal explosion of a single cylindrical battery cell can be quickly eliminated while efficient heat dissipation is realized, so that the safety performance of the distributed micro-storage device is effectively improved, and the service life of the distributed micro-storage device is prolonged. And the requirement of safe energy storage is met.

Description

Technical Field

[0001] This disclosure relates to the field of energy storage technology, and in particular to a cylindrical distributed micro energy storage device and energy storage system. Background Technology

[0002] Distributed micro-storage is similar to a micro-energy storage power station, and its operation is not affected by the pressure of urban power supply. During off-peak hours, distributed micro-storage devices can charge themselves for use during peak hours or power outages. In addition to serving as an emergency power source, distributed micro-storage devices can also save on electricity costs by balancing the power load.

[0003] However, in existing distributed micro-energy storage devices, the cells are mostly arranged in a rectangular pattern, resulting in a dispersed structure. This leads to problems such as insufficient heat dissipation and a high risk of thermal runaway, making it difficult to meet the requirements for safe energy storage. Summary of the Invention

[0004] This disclosure aims to at least partially address one of the technical problems in the related art.

[0005] Therefore, the purpose of this disclosure is to provide a cylindrical distributed micro-storage device and energy storage system.

[0006] To achieve the above objectives, the first aspect of this disclosure provides a cylindrical distributed micro-storage device, comprising: a duct; an air-cooling component, wherein the air-cooling end of the air-cooling component is connected to one end of the duct, and the air-cooling component is used to generate cooling air inside the duct; at least one annular frame, the annular frame being sleeved on the outside of the duct, wherein a plurality of cylindrical battery cells are disposed within the annular frame and spaced apart along the circumference of the duct, and the cylindrical battery cells are disposed radially along the duct; wherein the duct is provided with a plurality of hot-melt zones, and the pressure relief end of the cylindrical battery cell is disposed opposite to the hot-melt zone.

[0007] Optionally, the annular frame includes: a support frame, which is sleeved on the outside of the air duct; and a heat dissipation frame, which is sleeved on the outside of the air duct and connected to the support frame; wherein, the support frame is provided with a plurality of first receiving slots spaced apart along the circumference of the air duct on the side near the heat dissipation frame, and the heat dissipation frame is provided with a plurality of second receiving slots spaced apart along the circumference of the air duct on the side near the support frame, the openings of the first receiving slots and the openings of the second receiving slots are arranged opposite to each other to form a receiving cavity, and the cylindrical battery cell is disposed in the receiving cavity.

[0008] Optionally, the support frame includes: a first support ring plate, a second support ring plate, and a plurality of arc-shaped support plates. The first support ring plate is connected to the heat sink frame, and the second support ring plate is sleeved on the outside of the first metal ring plate. The second support ring plate and the side of the first support ring plate away from the heat sink frame are connected. The arc-shaped support plates are arranged radially along the air duct and inside the second support ring plate to form the first receiving groove. The plurality of arc-shaped support plates are distributed circumferentially along the air duct. The second support ring plate is provided with a plurality of through holes distributed circumferentially along the air duct, and the through holes and the end of the receiving cavity away from the air duct are arranged opposite to each other.

[0009] Optionally, the heat dissipation frame includes: a first metal ring plate, a second metal ring plate, and a plurality of arc-shaped metal sheets. The first metal ring plate is sleeved on the outside of the air duct, and the second metal ring plate is sleeved on the outside of the first metal ring plate. The second metal ring plate is connected to the support frame. The arc-shaped metal sheets are arranged radially between the first metal ring plate and the second metal ring plate along the air duct to form the second receiving groove. The plurality of arc-shaped metal sheets are distributed circumferentially along the air duct.

[0010] Optionally, the distributed micro-storage device further includes: an intermediate frame, which is sleeved on the outside of the air duct; the at least one annular frame includes: a first frame and a second frame, which are respectively sleeved on the outside of the air duct, and the intermediate frame is disposed between the first frame and the second frame, and the first frame and the second frame are symmetrically distributed along the intermediate frame.

[0011] Optionally, the distributed micro-storage device further includes: a base, which is sleeved on the outside of the air duct and located at the end of the air duct away from the air-cooling component. The base and the end of the air duct near the air-cooling component are connected. The intermediate frame is disposed on the inside of the base. The first frame and the second frame are respectively located between the inside of the base and the outside of the air duct.

[0012] Optionally, the base is provided with a plurality of openings spaced apart along the circumference of the air duct, and a sealing body is provided in the opening.

[0013] Optionally, the air-cooling component is disposed inside the air duct; the distributed micro-storage device further includes: a battery management system (BMS) module and an energy storage converter (PCS) module, wherein the PCS module is connected to the charging and discharging terminals of the cylindrical battery cell, and the output terminal of the BMS module is connected to the control terminal of the PCS module; wherein the BMS module and the PCS module are respectively disposed inside the air duct, and the air-cooling component is located between the BMS module and the PCS module.

[0014] Optionally, the diameter of the duct decreases along the direction of the cooling airflow.

[0015] A second aspect of this disclosure provides an energy storage system, including a cylindrical distributed micro-storage device as provided in the first aspect of this disclosure.

[0016] The technical solution provided in this disclosure may include the following beneficial effects:

[0017] Because the annular frame is fitted on the outside of the duct, and multiple cylindrical cells are spaced apart along the circumference of the duct within the annular frame, and arranged radially along the duct, multiple cylindrical cells form an annular arrangement on the outside of the duct. This not only achieves efficient integration of multiple cylindrical cells, thereby improving the energy storage performance of the distributed micro-storage device, but also allows multiple cylindrical cells to achieve balanced and concentrated heat dissipation using the cooling air inside the duct, thus effectively improving the heat dissipation efficiency of the distributed micro-storage device. Furthermore, because the duct has multiple heat-fusion zones, and the pressure relief end of the cylindrical cell is positioned opposite to the heat-fusion zone, when a cylindrical cell experiences thermal runaway and generates a large amount of hot gas, the hot gas can break through the heat-fusion zone and diffuse into the inside of the duct, where it can be quickly discharged using the cooling air inside the duct, thereby reducing the risk of thermal runaway of the distributed micro-storage device. Therefore, by combining components such as air-cooled parts, ring frame, and air duct, a two-in-one combined structure of air-cooled channel and thermal runaway channel is realized. While achieving efficient heat dissipation, it can also quickly remove the airflow of thermal explosion of a single cylindrical cell, thereby effectively improving the safety performance of the distributed micro energy storage device and meeting the requirements of safe energy storage.

[0018] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0020] Figure 1 This is a schematic diagram showing the disassembled cylindrical distributed micro-storage device according to an embodiment of this disclosure;

[0021] Figure 2 This is a schematic diagram showing the disassembled cylindrical distributed micro-storage device according to an embodiment of this disclosure;

[0022] As shown in the figure: 1. Air duct, 2. Air-cooled component;

[0023] 3. Ring frame;

[0024] 31. Bearing frame; 311. First bearing ring plate; 312. Second bearing ring plate; 313. Arc-shaped bearing plate;

[0025] 32. Heat sink bracket; 321. First metal ring plate; 322. Second metal ring plate; 323. Arc-shaped metal sheet;

[0026] 4. Cylindrical battery cell; 5. Intermediate frame; 6. Base; 7. Opening; 8. BMS module; 9. PCS module;

[0027] 100. First frame; 200. Second frame. Detailed Implementation

[0028] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are used only to explain this disclosure, and should not be construed as limiting this disclosure. Rather, embodiments of this disclosure include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0029] like Figure 1 and Figure 2 As shown in the figure, this disclosure proposes a distributed micro-storage device with cylindrical battery cells 4, including: a duct 1, a cooling component 2, and at least one annular frame 3. The cooling end of the cooling component 2 is connected to one end of the duct 1, and the cooling component 2 is used to generate cooling air inside the duct 1. The annular frame 3 is sleeved on the outside of the duct 1, and a plurality of cylindrical battery cells 4 are arranged circumferentially and spaced apart within the annular frame 3, and the cylindrical battery cells 4 are arranged radially along the duct 1. The duct 1 is provided with a plurality of hot-melt zones, and the pressure relief end of the cylindrical battery cell 4 is arranged opposite to the hot-melt zones.

[0030] It is understandable that, since the annular frame 3 is fitted on the outside of the air duct 1, and multiple cylindrical battery cells 4 are arranged at intervals along the circumference of the air duct 1 inside the annular frame 3, and the cylindrical battery cells 4 are arranged radially along the air duct 1, the multiple cylindrical battery cells 4 form an annular columnar arrangement structure on the outside of the air duct 1. This not only achieves efficient integration of multiple cylindrical battery cells 4, thereby improving the energy storage performance of the distributed micro energy storage device, but also enables multiple cylindrical battery cells 4 to achieve balanced and concentrated heat dissipation by utilizing the cooling air inside the air duct 1, thereby effectively improving the heat dissipation efficiency of the distributed micro energy storage device.

[0031] Furthermore, since the air duct 1 is equipped with multiple hot melt zones, and the pressure relief end of the cylindrical battery cell 4 is positioned opposite to the hot melt zones, when the cylindrical battery cell 4 experiences thermal runaway and generates a large amount of hot gas, the hot gas can break through the hot melt zones and diffuse into the inside of the air duct 1. This allows for rapid exhaust using the cooling air inside the air duct 1, thereby reducing the risk of thermal runaway in the distributed micro-storage device.

[0032] Therefore, by utilizing the combination of components such as the air-cooled component 2, the ring frame 3, and the air duct 1, a combined structure of air-cooled channel and thermal runaway channel is realized. While achieving efficient heat dissipation, it can also quickly remove the airflow caused by the thermal explosion of the single cylindrical cell 4, thereby effectively improving the safety performance of the distributed micro-storage device and meeting the requirements of safe energy storage.

[0033] It should be noted that cylindrical cell 4 is a cell with a cylindrical structure, such as a round cell. The specific type of cylindrical cell 4 can be set according to actual needs and there are no restrictions on it. For example, the positive terminal and pressure relief valve of cylindrical cell 4 are located at one end of cylindrical cell 4, and the negative terminal of cylindrical cell 4 is located at the other end of cylindrical cell 4. The model of cylindrical cell 4 can be 46800.

[0034] The ring frame 3 is used to support multiple cylindrical battery cells 4 to achieve efficient integration of multiple cylindrical battery cells 4 on the outside of the air duct 1. At the same time, through the structural arrangement of the cylindrical battery cells 4, the air-cooling channel and the thermal runaway channel are combined into one design. The specific type of the ring frame 3 can be set according to actual needs and there are no restrictions on it.

[0035] The distributed micro-storage device includes multiple cylindrical cells 4. The distributed micro-storage device uses the integrated cylindrical cells 4 for charging during off-peak hours and discharging during peak hours or power outages. The specific application scenarios of the distributed micro-storage device can be set according to actual needs, and there are no restrictions on this.

[0036] The air duct 1 is used to realize the flow of cooling air using the air-cooling component 2, so as to realize the heat dissipation of the distributed micro-storage device. At the same time, the hot air of the cylindrical cell 4 is passed through the air duct 1 through the hot air using the hot air to realize the rapid discharge of the hot air. The specific type of air duct 1 can be set according to actual needs and there is no limitation. For example, the air duct 1 is a near-tubular channel structure. The air duct 1 is integrally injection molded from plastic and other materials, which not only helps to reduce costs, but also reduces the weight of the distributed micro-storage device. At the same time, plastic and other materials are easily broken through by hot melting, thus avoiding the need for separate fabrication of the hot melting area on the air duct 1.

[0037] The air-cooled component 2 is used to generate cooling air inside the air duct 1. The specific type of the air-cooled component 2 can be set according to actual needs and is not limited thereto. For example, the air-cooled component 2 can be a fan with the air inlet facing the outside of the air duct 1 and the air outlet facing the inside of the air duct 1.

[0038] like Figure 1As shown, in some embodiments, the annular frame 3 includes a support frame 31 and a heat sink 32. The support frame 31 is sleeved on the outside of the air duct 1, and the heat sink 32 is sleeved on the outside of the air duct 1, and the heat sink 32 and the support frame 31 are connected. The support frame 31 has a plurality of first receiving slots spaced apart along the circumference of the air duct 1 on the side near the heat sink 32, and the heat sink 32 has a plurality of second receiving slots spaced apart along the circumference of the air duct 1 on the side near the support frame 31. The openings of the first and second receiving slots are arranged opposite each other to form a receiving cavity, and a cylindrical battery cell 4 is disposed within the receiving cavity.

[0039] It is understandable that, since the support frame 31 is provided with a plurality of first receiving slots spaced apart along the circumference of the air duct 1 on the side near the heat sink 32, and the heat sink 32 is provided with a plurality of second receiving slots spaced apart along the circumference of the air duct 1 on the side near the support frame 31, after the openings of the first receiving slots and the openings of the second receiving slots are arranged opposite each other to form a receiving cavity, not only can the cylindrical battery cell 4 be supported and arranged using the receiving cavity, but also the separate arrangement of the heat sink 32 and the support frame 31 facilitates the disassembly and replacement of the cylindrical battery cell 4, thereby making the use of the distributed micro-storage device more flexible and convenient.

[0040] The heat dissipation efficiency of the cylindrical cell 4 can be further improved by utilizing the heat dissipation bracket 32, thereby ensuring the high heat dissipation performance of the distributed micro-storage device.

[0041] It should be noted that the support frame 31 is used to support the cylindrical battery cell 4 and works with the heat sink 32 to realize the positioning and arrangement of the cylindrical battery cell 4. The specific type of the support frame 31 can be set according to actual needs and there are no restrictions on it.

[0042] The heat sink 32 is used for heat dissipation of the cylindrical battery cell 4 and works with the support frame 31 to realize the positioning and arrangement of the cylindrical battery cell 4. The specific type of heat sink 32 can be set according to actual needs and there are no restrictions on it.

[0043] like Figure 2 As shown, in some embodiments, the support frame 31 includes: a first support ring plate 311, a second support ring plate 312, and a plurality of arc-shaped support plates 313. The first support ring plate 311 is connected to the heat sink 32, and the second support ring plate 312 is sleeved on the outside of the first metal ring plate 321. The second support ring plate 312 and the side of the first support ring plate 311 away from the heat sink 32 are connected. The arc-shaped support plates 313 are arranged radially along the air duct 1 on the inner side of the second support ring plate 312 and form a first receiving groove. The plurality of arc-shaped support plates 313 are distributed circumferentially along the air duct 1. The second support ring plate 312 is provided with a plurality of through holes distributed circumferentially along the air duct 1, and the through holes and the end of the receiving cavity away from the air duct 1 are arranged opposite to each other.

[0044] It is understandable that, since the first bearing ring plate 311 is connected to the heat sink 32, and the second bearing ring plate 312 is connected to the side of the first bearing ring plate 311 away from the heat sink 32, the arc-shaped bearing plate 313 is arranged radially along the air duct 1 inside the second bearing ring plate 312 and forms a first receiving groove, so that the first bearing ring plate 311, the second bearing ring plate 312 and the arc-shaped bearing plate 313 cooperate to form a bearing structure supporting the cylindrical battery cell 4, thereby ensuring the stable arrangement of the cylindrical battery cell 4 on the outside of the air duct 1.

[0045] Meanwhile, since the second bearing ring plate 312 is provided with multiple through holes spaced apart along the circumference of the air duct 1, and the through holes and the end of the receiving cavity away from the air duct 1 are arranged opposite each other, the cylindrical battery cell 4 can be arranged in the receiving cavity while the through holes are used to realize wiring, pressure release, etc., thus making the use of the distributed micro storage device safer and more convenient.

[0046] It should be noted that the first bearing ring plate 311 is used to support the second bearing ring plate 312 and connect the heat sink 32. The specific type of the first bearing ring plate 311 can be set according to actual needs and there is no limitation. For example, the first bearing ring plate 311 is a ring-shaped plate structure. The first bearing ring plate 311 can be provided with slots, protrusions and other structures to facilitate detachable connection with structural components such as the heat sink 32.

[0047] The second bearing ring plate 312 is used to support the arc-shaped bearing plate 313 and connects to the first bearing ring plate 311. The specific type of the second bearing ring plate 312 can be set according to actual needs and there is no restriction. For example, the second bearing ring plate 312 is a ring-shaped plate structure. The second bearing ring plate 312 can be set on the first bearing ring plate 311 by welding or other methods.

[0048] The arc-shaped support plate 313 is used to form the first receiving groove to cooperate with the second receiving groove to realize the receiving and bearing of the cylindrical battery cell 4. The specific type of the arc-shaped support plate 313 can be set according to actual needs and there is no restriction. For example, the cross section of the arc-shaped support plate 313 is arc-shaped, and the length direction of the arc-shaped support plate 313 is located in the radial direction of the air duct 1. The arc-shaped support plate 313 can be set on the second support ring plate 312 by welding or other methods.

[0049] like Figure 2As shown, in some embodiments, the heat dissipation frame 32 includes: a first metal ring plate 321, a second metal ring plate 322, and a plurality of arc-shaped metal sheets 323. The first metal ring plate 321 is sleeved on the outside of the air duct 1, and the second metal ring plate 322 is sleeved on the outside of the first metal ring plate 321. The second metal ring plate 322 is connected to the support frame 31. The arc-shaped metal sheets 323 are arranged radially between the first metal ring plate 321 and the second metal ring plate 322 along the air duct 1 and form a second receiving groove. The plurality of arc-shaped metal sheets 323 are distributed at intervals along the circumference of the air duct 1.

[0050] Understandably, since the first metal ring plate 321 is sleeved on the outside of the air duct 1, and the second metal ring plate 322 is sleeved on the outside of the first metal ring plate 321, the arc-shaped metal sheet 323 is arranged radially along the air duct 1 between the first metal ring plate 321 and the second metal ring plate 322 to form a second receiving groove. This allows the first metal ring plate 321, the second metal ring plate 322 and the arc-shaped metal sheet 323 to cooperate to form a supporting structure and heat dissipation structure for the cylindrical battery cell 4, thereby ensuring the stable arrangement of the cylindrical battery cell 4 on the outside of the air duct 1, and further improving the heat dissipation performance of the cylindrical battery cell 4.

[0051] It should be noted that the first metal ring plate 321 is used to support the arc-shaped metal sheet 323 and for heat conduction. The specific type of the first metal ring plate 321 can be set according to actual needs and is not limited thereto. For example, the first metal ring plate 321 can be a ring plate made of metal material.

[0052] The second metal ring plate 322 is used to support the arc-shaped metal sheet 323 and for heat conduction. The specific type of the second metal ring plate 322 can be set according to actual needs and is not limited thereto. For example, the second metal ring plate 322 can be a ring plate made of metal material. The diameter of the second metal ring plate 322 is larger than the diameter of the first metal ring plate 321. The second metal ring plate 322 can be connected to the first bearing ring plate 311 by means of snap-fit, fastening or other detachable methods.

[0053] The arc-shaped metal sheet 323 is used to form a second receiving groove to cooperate with the first receiving groove to realize the receiving and bearing of the cylindrical battery cell 4. At the same time, the arc-shaped metal sheet 323 is also used for heat conduction. The specific type of the arc-shaped metal sheet 323 can be set according to actual needs and there is no limitation. For example, the arc-shaped metal sheet 323 is made of metal material with an arc-shaped cross section. The length direction of the arc-shaped metal sheet 323 is located in the radial direction of the air duct 1. The arc-shaped metal sheet 323 can be set between the first bearing ring plate 311 and the second bearing ring plate 312 by welding or other methods.

[0054] like Figure 1 and Figure 2As shown, in some embodiments, the distributed micro-storage device further includes: an intermediate frame 5, which is sleeved on the outside of the air duct 1; at least one annular frame 3 includes: a first frame 100 and a second frame 200, which are respectively sleeved on the outside of the air duct 1, and the intermediate frame 5 is disposed between the first frame 100 and the second frame 200, and the first frame 100 and the second frame 200 are symmetrically distributed along the intermediate frame 5.

[0055] It is understandable that by setting up the first frame 100 and the second frame 200, multiple cylindrical cells 4 form a double-layer arrangement structure on the outside of the air duct 1. This enables efficient integration of multiple cylindrical cells 4 while facilitating balanced and centralized heat dissipation and rapid exhaust and diffusion of thermal runaway heat flow, thereby ensuring the high energy storage performance of the distributed micro-storage device.

[0056] Meanwhile, since the first frame 100 and the second frame 200 are respectively fitted on the outside of the air duct 1, and the intermediate frame 5 is set between the first frame 100 and the second frame 200, the first frame 100 and the second frame 200 are symmetrically distributed along the intermediate frame 5, so that the first frame 100 and the second frame 200 can be stably arranged on the outside of the air duct 1 by using the intermediate frame 5, thereby ensuring the stable operation of the distributed micro storage device.

[0057] It should be noted that both the first frame 100 and the second frame 200 are annular frames 3. The first frame 100 and the second frame 200 are stably fitted onto the outside of the air duct 1 through the intermediate frame 5. The specific type of the intermediate frame 5 can be set according to actual needs and is not limited thereto. For example, the intermediate frame 5 can be an annular plate structure, and the two sides of the intermediate frame 5 are respectively provided with slots. The first bearing ring plate 311 of the first frame 100 and the first bearing ring plate 311 of the second frame 200 are respectively engaged in the slots on both sides of the intermediate frame 5.

[0058] like Figure 1 and Figure 2 As shown, in some embodiments, the distributed micro-storage device further includes: a base 6, which is sleeved on the outside of the air duct 1 and located at the end of the air duct 1 away from the air-cooling component 2. The base 6 and the end of the air duct 1 near the air-cooling component 2 are connected. An intermediate frame 5 is disposed on the inside of the base 6. The first frame 100 and the second frame 200 are respectively located between the inside of the base 6 and the outside of the air duct 1.

[0059] It is understandable that, since the base 6 is fitted on the outside of the air duct 1 and is located at the end of the air duct 1 away from the air-cooling component 2, and the base 6 is connected to the end of the air duct 1 near the air-cooling component 2, the base 6 forms a stable support and protection structure on the outside of the air duct 1. Furthermore, since the intermediate frame 5 is located on the inside of the base 6, and the first frame 100 and the second frame 200 are located between the inside of the base 6 and the outside of the air duct 1, the first frame 100 and the second frame 200 can be stably arranged on the outside of the air duct 1 using the intermediate frame 5 and the base 6, thereby ensuring the stable operation of the distributed micro-storage device.

[0060] It should be noted that the base 6 is used to support the intermediate frame 5 on the outside of the air duct 1, and to protect the first frame 100 and the second frame 200. The specific type of the base 6 can be set according to actual needs and is not limited thereto. For example, the base 6 can be a cylindrical structure. One end of the base 6 is provided with a first ring plate. The inner ring of the first ring plate is connected to the end of the air duct 1 away from the air-cooling component 2. The end of the air duct 1 close to the air-cooling component 2 is provided with a second ring plate. The end of the base 6 away from the first ring plate is connected to the second ring plate. Thus, a chamber structure for accommodating the first frame 100 and the second frame 200 is formed between the inner side of the base 6 and the outer side of the air duct 1.

[0061] Among them, structural components such as the intermediate frame 5 and the base 6 can all be made of plastic or other materials to reduce the overall cost.

[0062] like Figure 1 and Figure 2 As shown, in some embodiments, the base 6 is provided with a plurality of openings 7 spaced apart along the circumference of the air duct 1, and a sealing body (not shown in the figure) is provided in the opening 7.

[0063] Understandably, since the base 6 is provided with multiple openings 7 spaced apart along the circumference of the air duct 1, and the openings 7 are provided with sealing bodies, the cylindrical cells 4 in the first frame 100 and the second frame 200 can be protected by the sealing bodies, while also being able to relieve pressure and reduce weight by using the openings 7, thus making the use of the distributed micro-storage device safer and more convenient.

[0064] It should be noted that the sealing body is used to seal the opening 7 of the base 6. The specific type of sealing body can be set according to actual needs and there is no restriction. For example, the sealing body can be a rubber pad, etc. When the gas generated by the thermal runaway of the cylindrical cell 4 cannot be discharged from the air duct 1, it can be discharged from the opening 7 by breaking through the sealing body.

[0065] like Figure 1 and Figure 2As shown, in some embodiments, the air-cooling component 2 is disposed inside the air duct 1; the distributed micro-storage device further includes: a BMS (Battery Management System) module 8 and a PCS (Power Conversion System) module 9. The PCS module 9 is connected to the charging and discharging terminals of the cylindrical battery cell 4, and the output terminal of the BMS module 8 is connected to the control terminal of the PCS module 9. The BMS module 8 and the PCS module 9 are respectively disposed inside the air duct 1, and the air-cooling component 2 is located between the BMS module 8 and the PCS module 9.

[0066] It is understandable that, since the PCS module 9 and the cylindrical cell 4 are connected to each other for charging and discharging, and the output terminal of the BMS module 8 is connected to the control terminal of the PCS module 9, the cylindrical cell 4 can be charged and discharged using the PCS module 9 under the control of the BMS module 8, thereby meeting the energy storage requirements.

[0067] Meanwhile, since BMS module 8 and PCS module 9 are respectively located inside the air duct 1, and air-cooled component 2 is located between BMS module 8 and PCS module 9, air-cooled component 2, BMS module 8 and PCS module 9 are efficiently integrated inside the air duct 1, thereby effectively reducing the volume of the distributed micro storage device and improving the assembly flexibility of the distributed micro storage device.

[0068] It should be noted that the BMS module 8 is used in conjunction with the equipment that monitors the status of the cylindrical battery cells 4. Its main purpose is to intelligently manage and maintain each cylindrical battery cell 4, prevent overcharging and over-discharging of the cylindrical battery cells 4, and extend the service life of the cylindrical battery cells 4. The specific type of the BMS module 8 can be set according to actual needs and there are no restrictions on it.

[0069] PCS module 9 is used to control the converter to charge or discharge the cylindrical battery cell 4 according to the sign and magnitude of the power command under the control of BMS module 8, so as to realize the regulation of the active and reactive power of the power grid. The specific type of PCS module 9 can be set according to actual needs and there are no restrictions on it.

[0070] Among them, distributed micro-storage devices can use high-voltage systems, which helps to reduce current and lower the temperature generated by the current, thereby improving the performance of distributed micro-storage devices. Furthermore, high-voltage systems have a more mature BMS product market and offer better cost performance than low-voltage systems.

[0071] In some embodiments, a gas detector may also be installed inside the duct 1 to realize closed-loop control of electrical components such as the air-cooled component 2 using the gas signal detected by the gas detector.

[0072] In some embodiments, the diameter of the duct 1 decreases along the direction of the cooling airflow.

[0073] Understandably, because the diameter of the duct 1 decreases along the direction of the cooling air, the cooling air can be gradually compressed as it flows through the duct 1, thereby effectively reducing the temperature of the cooling air and improving the heat dissipation efficiency of the cooling air on the cylindrical battery cell 4, ensuring that the distributed micro-storage device has high safety performance.

[0074] It should be noted that the diameter of duct 1 can decrease linearly along the direction of the cooling air or decrease intermittently, and there is no restriction on this.

[0075] This disclosure also proposes an energy storage system, including a distributed micro-storage device of cylindrical battery cell 4 as described in this disclosure.

[0076] It is understandable that, since the annular frame 3 is fitted on the outside of the air duct 1, and multiple cylindrical battery cells 4 are arranged at intervals along the circumference of the air duct 1 inside the annular frame 3, and the cylindrical battery cells 4 are arranged radially along the air duct 1, the multiple cylindrical battery cells 4 form an annular arrangement structure on the outside of the air duct 1. This not only achieves efficient integration of multiple cylindrical battery cells 4, thereby improving the energy storage performance of the distributed micro energy storage device, but also enables multiple cylindrical battery cells 4 to achieve balanced and concentrated heat dissipation by utilizing the cooling air inside the air duct 1, thereby effectively improving the heat dissipation efficiency of the distributed micro energy storage device.

[0077] Furthermore, since the air duct 1 is equipped with multiple hot melt zones, and the pressure relief end of the cylindrical battery cell 4 is positioned opposite to the hot melt zones, when the cylindrical battery cell 4 experiences thermal runaway and generates a large amount of hot gas, the hot gas can break through the hot melt zones and diffuse into the inside of the air duct 1. This allows for rapid exhaust using the cooling air inside the air duct 1, thereby reducing the risk of thermal runaway in the distributed micro-storage device.

[0078] Therefore, by utilizing the combination of components such as the air-cooled component 2, the ring frame 3, and the air duct 1, a combined structure of air-cooled channel and thermal runaway channel is realized. While achieving efficient heat dissipation, it can also quickly remove the airflow caused by the thermal explosion of the single cylindrical cell 4, thereby effectively improving the safety performance of the distributed micro-storage device and meeting the requirements of safe energy storage.

[0079] It should be noted that in the description of this disclosure, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0080] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of preferred embodiments of this disclosure includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this disclosure pertain.

[0081] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0082] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A cylindrical distributed micro-storage device, characterized in that, include: Air ducts; An air-cooled component, wherein the air-cooled end of the air-cooled component is connected to one end of the air duct, and the air-cooled component is used to generate cooling air inside the air duct; At least one annular frame is sleeved on the outside of the air duct, and a plurality of cylindrical battery cells are arranged in the annular frame at intervals along the circumference of the air duct, and the cylindrical battery cells are arranged along the radial direction of the air duct. The air duct is provided with multiple heat-fusion zones, and the pressure relief end of the cylindrical battery cell is arranged opposite to the heat-fusion zones.

2. The cylindrical distributed micro-storage device according to claim 1, characterized in that, The ring frame includes: A support frame, which is sleeved on the outside of the air duct; A heat dissipation frame is sleeved on the outside of the air duct, and the heat dissipation frame is connected to the support frame; The support frame has a plurality of first receiving slots spaced apart along the circumference of the air duct on the side near the heat sink frame, and the heat sink frame has a plurality of second receiving slots spaced apart along the circumference of the air duct on the side near the support frame. The openings of the first receiving slots and the openings of the second receiving slots are arranged opposite each other to form a receiving cavity, and the cylindrical battery cell is disposed in the receiving cavity.

3. The cylindrical distributed micro-storage device according to claim 2, characterized in that, The support frame includes: The system comprises a first bearing ring plate, a second bearing ring plate, and multiple arc-shaped bearing plates. The first bearing ring plate is connected to the heat sink frame, and the second bearing ring plate is sleeved on the outside of the first metal ring plate. The second bearing ring plate is connected to the side of the first bearing ring plate away from the heat sink frame. The arc-shaped bearing plates are arranged radially along the air duct and inside the second bearing ring plate to form the first receiving groove. The multiple arc-shaped bearing plates are distributed circumferentially along the air duct. The second bearing ring plate is provided with a plurality of through holes spaced apart along the circumference of the air duct, and the through holes and the end of the receiving cavity away from the air duct are arranged opposite each other.

4. The cylindrical distributed micro-storage device according to claim 2, characterized in that, The heat sink includes: A first metal ring plate, a second metal ring plate, and a plurality of arc-shaped metal sheets are provided. The first metal ring plate is sleeved on the outside of the air duct, and the second metal ring plate is sleeved on the outside of the first metal ring plate. The second metal ring plate is connected to the support frame. The arc-shaped metal sheets are arranged radially between the first metal ring plate and the second metal ring plate to form the second receiving groove. The plurality of arc-shaped metal sheets are distributed circumferentially along the air duct.

5. The cylindrical distributed micro-storage device according to claim 1, characterized in that, The distributed micro-storage device further includes: an intermediate frame, which is sleeved on the outside of the air duct; The at least one annular frame includes: a first frame and a second frame, the first frame and the second frame being respectively sleeved on the outside of the air duct, and the intermediate frame being disposed between the first frame and the second frame, the first frame and the second frame being symmetrically distributed along the intermediate frame.

6. The cylindrical distributed micro-storage device according to claim 5, characterized in that, The distributed micro-storage device also includes: A base is fitted onto the outside of the air duct and is located at the end of the air duct away from the air-cooling component. The base and the end of the air duct near the air-cooling component are connected. An intermediate frame is disposed on the inside of the base. The first frame and the second frame are respectively located between the inside of the base and the outside of the air duct.

7. The cylindrical distributed micro-storage device according to claim 6, characterized in that, The base is provided with multiple openings spaced apart along the circumference of the air duct, and a sealing body is provided in each opening.

8. The cylindrical distributed micro-storage device according to claim 1, characterized in that, The air-cooled component is located inside the air duct; The distributed micro-storage device further includes: a battery management system (BMS) module and an energy storage converter (PCS) module. The PCS module is connected to the charging and discharging terminals of the cylindrical battery cell, and the output terminal of the BMS module is connected to the control terminal of the PCS module. The BMS module and the PCS module are respectively located inside the air duct, and the air-cooled component is located between the BMS module and the PCS module.

9. The cylindrical distributed micro-storage device according to claim 1, characterized in that, The diameter of the air duct decreases along the direction of the cooling air.

10. An energy storage system, characterized in that, include: The cylindrical distributed micro-storage device as described in any one of claims 1-9.

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