Heat dissipation system and energy storage equipment

Abstract

The utility model provides a heat dissipation system and an energy storage device. The heat dissipation system comprises a housing which is provided with a first cold gate hole, a second cold gate hole and a heat extraction gate hole; a first cavity capable of accommodating a battery module is formed in the battery cell bracket, a first air inlet and a first air outlet are formed in the battery cell bracket, and the first cold grid hole, the first air inlet, the first cavity and the first air outlet are sequentially communicated to form a first airflow channel; a second cavity used for containing an electronic device is formed in the first isolation piece, a second air inlet and a second air outlet are formed in the first isolation piece, and the second cold gate hole, the second air inlet, the second cavity and the second air outlet are sequentially communicated to form a second airflow channel; the cooling fan can drive air to flow to the heat extraction grid holes from the first air flow channel and the second air flow channel. According to the heat dissipation system, parallel heat dissipation of the battery module and the electronic device can be realized, so that the battery module meets the high-rate discharge requirement, and the output power of the energy storage equipment is further improved.

Description

Technical Field

[0001] This utility model relates to the field of energy storage equipment technology, and in particular to a heat dissipation system and energy storage equipment. Background Technology

[0002] With the rapid development of new energy technologies, the demand for energy storage equipment is also gradually increasing.

[0003] Currently, small-capacity energy storage devices are typically used in small-scale applications such as photovoltaic power generation. Because of their advantages—low cost, flexible operation, and the ability to store and discharge energy at any time—small-capacity energy storage devices can not only improve users' quality of life but also offer greater convenience, thereby increasing users' energy choices and control, ultimately enabling them to live a low-carbon lifestyle and raising their environmental awareness.

[0004] It should be noted that because small-capacity energy storage devices have a relatively small capacity, their output power is generally also relatively small. Smaller capacity can be understood as fewer individual battery cells making up the battery module. The output power of small-capacity energy storage devices is limited not only by the number of individual battery cells but also by the discharge rate of each individual cell. Specifically, when the number of individual battery cells is fixed, users can increase the output power by forcing each individual cell to meet the high discharge rate requirement.

[0005] Generally speaking, whether a single battery cell can meet the requirements for high-rate discharge depends primarily on whether its heat dissipation performance meets expectations. To elaborate further, when the overall heat dissipation of a small-capacity energy storage device is poor, the heat dissipation performance of individual battery cells cannot meet expectations, thus preventing them from meeting the requirements for high-rate discharge.

[0006] It is understandable that, since the heat source of small-capacity energy storage devices mainly comes from the battery modules and electronic components on the circuit board, the heat dissipation effect of the heat dissipation system in small-capacity energy storage devices on the battery modules and electronic components on the circuit board will affect the overall heat dissipation effect of the small-capacity energy storage devices.

[0007] However, traditional heat dissipation systems cannot achieve parallel heat dissipation between battery modules and electronic components on the circuit board, resulting in poor overall heat dissipation of traditional energy storage devices. Consequently, the heat dissipation of individual battery cells is also poor, which in turn prevents individual battery cells from meeting the requirements for high-rate discharge. Therefore, traditional heat dissipation systems reduce the output power of traditional energy storage devices. Utility Model Content

[0008] The heat dissipation system and energy storage device provided by this utility model aim to solve at least some of the defects of existing heat dissipation systems applicable to energy storage devices.

[0009] In a first aspect, this utility model provides a heat dissipation system. The heat dissipation system includes:

[0010] The outer casing has a first cold grid hole at its bottom in a first direction, and a second cold grid hole and a heat dissipation grid hole on opposite sides in a second direction, wherein the first direction and the second direction are perpendicular to each other.

[0011] A cell support is placed inside the housing and forms a first chamber that can accommodate a battery module. The cell support has a first air inlet and a first air outlet on opposite sides in the first direction. The first cold grid hole, the first air inlet, the first chamber and the first air outlet are sequentially connected to form a first airflow channel in the first direction.

[0012] The first isolator has a second chamber inside it for accommodating electronic devices on the circuit board. The first isolator is located inside the housing and is spaced apart from the cell support in the first direction. The first isolator has a second air inlet and a second air outlet at its two opposite ends in the second direction. The end of the first isolator with the second air inlet abuts against the side of the housing with the second cold grid hole. The second cold grid hole, the second air inlet, the second chamber, and the second air outlet are sequentially connected and form a second airflow channel in the second direction.

[0013] A cooling fan is disposed inside the housing and located at the heat dissipation grid hole. The cooling fan can drive gas to flow from the first airflow channel and the second airflow channel to the heat dissipation grid hole.

[0014] In some embodiments, the first isolation member includes: a top air duct plate and a pair of side air duct plates;

[0015] The top air duct plate and the cell support are arranged vertically along the first direction. A pair of side air duct plates are arranged between the top air duct plate and the cell support. One end of each side air duct plate abuts against the top air duct plate, and the other end of each side air duct plate abuts against the circuit board on which the electronic device is deployed.

[0016] In some embodiments, the heat dissipation system further includes: a second insulating element;

[0017] The second isolator extends around the periphery of the first air outlet of the cell bracket and is used to support the first isolator located on the circuit board. The perimeter of the second isolator is smaller than the perimeter of the first air outlet.

[0018] In some embodiments, the circumferential edge of the circuit board and the inner wall surface of the second isolation member form an isolation region, and the isolation region allows the first airflow channel and the second airflow channel to be independent of each other, so as to restrict the gas in the first airflow channel from entering the second airflow channel.

[0019] In some embodiments, the cell support is provided with a third air inlet on the side of the cell support that is close to the second cold grid hole in the first direction;

[0020] A portion of the gas flowing in from the second cold grid hole is guided to the electronic device by the second airflow channel, while another portion flows into the first chamber through the third air inlet.

[0021] In some embodiments, the heat dissipation system further includes:

[0022] A dustproof net is installed between the lower surface of the battery cell bracket where the first air inlet is located and the bottom surface of the outer casing. It can cover the first cold grid hole and the first air inlet to restrict external impurities from entering the first chamber.

[0023] In some embodiments, the heat dissipation system further includes:

[0024] A plurality of foot pads; all of the foot pads are disposed at the bottom of the housing and located on the outside of the housing;

[0025] The foot pad has a preset target height in the first direction, so that gas can flow into the first chamber from the first cold grid hole through the first air inlet under preset conditions.

[0026] In some embodiments, the battery cell support is provided with a plurality of mounting posts, all of which protrude from the surface of the battery cell support where the first air outlet is provided, and all of which are located within the second insulating member;

[0027] The circuit board is fixed on several mounting posts, and there is a preset target distance between the circuit board and the upper surface of the battery cell bracket where the first air outlet is located.

[0028] Secondly, this utility model provides an energy storage device. The energy storage device includes:

[0029] Battery module, circuit board with electronic components, and the aforementioned heat dissipation system;

[0030] The battery module is housed in the first chamber of the cell support in the heat dissipation system, and the gas flowing through the first airflow channel of the heat dissipation system carries away the heat of the battery module.

[0031] The electronic device is housed in the second chamber of the first isolation member in the heat dissipation system, and the gas flowing through the second airflow channel of the heat dissipation system can carry away the heat of the electronic device.

[0032] In some embodiments, the battery module includes: at least one layer of battery pack stacked along a first direction of the heat dissipation system;

[0033] Each layer of the battery pack consists of several individual battery cells arranged along the second direction of the heat dissipation system at a preset target spacing.

[0034] At least one beneficial effect of the heat dissipation system energy storage device provided by this utility model embodiment is that: by incorporating a first airflow channel, a second airflow channel and a first isolation component, the heat dissipation system can achieve parallel heat dissipation between the battery module and the electronic devices on the circuit board, which can effectively improve the overall heat dissipation efficiency of the energy storage device, thereby enabling the heat dissipation effect of the battery module to meet the expected requirements, so that the battery module can meet the requirements of high-rate discharge, and thus improve the output power of the energy storage device. Attached Figure Description

[0035] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are designated as the same elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0036] Figure 1 This is an exploded view of the energy storage device provided in an embodiment of the present utility model;

[0037] Figure 2 A cross-sectional schematic diagram of the energy storage device provided in the embodiment of this utility model;

[0038] Figure 3 A schematic diagram of airflow in an energy storage device provided in an embodiment of this utility model;

[0039] Figure 4 A schematic diagram of the energy storage device provided in this embodiment of the utility model, excluding the upper shell, front panel, and first insulating component;

[0040] Figure 5 An exploded view of the dustproof net, battery cell, cell support, and second separator provided in the embodiments of this utility model;

[0041] Figure 6 A schematic diagram of the outer shell provided for an embodiment of this utility model;

[0042] Figure 7 Provided for the embodiments of this utility model Figure 2 A magnified view of a portion at point A;

[0043] Figure 8 Provided for the embodiments of this utility model Figure 2 A magnified view of a section at point B.

[0044] Reference numerals: 100, Energy storage device; 1001, First direction; 1002, Second direction; 1003, Third direction; 1004, First cold airflow; 1005, Second cold airflow; 1006, Second hot airflow; 1007, Battery module hot airflow; 1008, Total hot airflow; 1009, Electronic device cold airflow; 1010, Battery module cold airflow; 1, Housing; 11, Upper housing; 12, Lower housing; 101, First cold grid hole; 102, Second cold grid hole; 103, Heat dissipation grid hole; 104, Support frame; 105, Joint edge; 106, Mounting port; 111, Handle; 1041. First support part; 1042, Second support part; 1043, Lower bottom surface; 1044, Upper bottom surface; 21, Cell bracket; 22, Battery cell; 211, Mounting post; 2101, First air inlet; 2102, First air outlet; 2103, Third air inlet; 31, Circuit board; 32, Electronic components; 301, Screw; 4, Cooling fan; 401, First side; 402, Second side; 5, First isolation component; 51, Top air duct plate; 52, Side air duct plate; 6, Second isolation component; 61, First baffle; 62, Second baffle; 7, Foot pad; 8, Dustproof net; 9, Foam; 10, Front panel. Detailed Implementation

[0045] The present invention will now be described in detail with reference to specific embodiments. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.

[0046] It should be noted that, unless otherwise explicitly specified and limited, the terms "first direction," "second direction," "third direction," "along," "towards," etc., used in this specification 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 this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "installation," "fitting," "connection," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixing" can be bolt fixing, snap-fit ​​fixing, or glue fixing. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," and "third" may explicitly or implicitly include one or more of that feature. "A plurality" or "several" means two or more. In addition, "and / or" includes any and all combinations of one or more of the related listed items. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0047] To make the objectives, technical solutions, and advantages of this utility model clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] Figure 1 An exploded view of the energy storage device provided in an embodiment of this utility model. Figure 2 This is a cross-sectional schematic diagram of an energy storage device provided in an embodiment of the present utility model. Figure 3 A schematic diagram of airflow in an energy storage device provided for an embodiment of this utility model. Figure 4 The energy storage device provided in this embodiment of the present invention does not include the upper shell, front panel and first isolation component.

[0049] Figure 5 An exploded view of the dustproof net, battery cell, cell support, and second separator provided in this embodiment of the utility model. Figure 6 A schematic diagram of the outer shell provided for an embodiment of this utility model. Figure 7 Provided for the embodiments of this utility model Figure 2 A magnified view of a portion at point A. Figure 8 Provided for the embodiments of this utility model Figure 2 A magnified view of a section at point B.

[0050] Please see Figures 1-8The heat dissipation system includes a housing 1, a cell support 21, a cooling fan 4, and a first insulating component 5.

[0051] Specifically, the outer casing 1 is provided with a first cold grid hole 101 at the bottom in the first direction 1001, and the outer casing 1 is provided with a second cold grid hole 102 and a heat dissipation grid hole 103 on opposite sides in the second direction 1002.

[0052] It should be noted that the first direction 1001 and the second direction 1002 are perpendicular to each other. When the cell support 21 is fixed at the bottom of the outer casing 1, the first direction 1001 is parallel to the height direction of the cell support 21, and the second direction 1002 is parallel to the length direction of the cell support 21.

[0053] It is understood that the cell support 21 is placed inside the outer casing 1, and the interior of the cell support 21 forms a first chamber that can accommodate the battery module (the battery module is composed of at least one layer of battery pack stacked along the first direction 1001, and each layer of battery pack is composed of several battery cells 22 arranged along the second direction 1002 at a preset target spacing). The cell support 21 has a first air inlet 2101 and a first air outlet 2102 respectively opened on opposite sides of the first direction 1001. The first cold grid hole 101, the first air inlet 2101, the first chamber and the first air outlet 2102 are sequentially connected and form a first airflow channel in the first direction 1001.

[0054] To further explain, the first cold airflow 1004 enters the first chamber through the first cold grid hole 101, passing through the dustproof mesh 8 and the first air inlet 2101. At this time, the first cold airflow 1004 can come into contact with the battery module and form the first hot airflow. In summary, this heat dissipation system adopts a bottom-up air supply method. Moreover, the second cold airflow 1005 (which can be divided into electronic device cold airflow 1009 and battery module cold airflow 1010) enters the second chamber through the second cold grid hole 102 and the second air inlet. The electronic device cold airflow 1009 can come into contact with at least one electronic device 32 and form the second hot airflow 1006. In addition, the battery module cold airflow 1010 can enter the first chamber through the third air inlet 2103 and come into contact with the battery module to form the third hot airflow. Specifically, the first hot airflow and the third hot airflow are mixed to form the battery module hot airflow 1007 that is discharged from the first air outlet into the first chamber.

[0055] The first isolator 5 has a second chamber inside it for accommodating electronic devices 32 on the circuit board 31. The first isolator 5 is located inside the outer casing 1 and is spaced apart from the cell support 21 in the first direction 1001. The two opposite ends of the first isolator 5 in the second direction 1002 are respectively provided with a second air inlet (the second cold airflow 1005 flowing in from the second cold grid hole 102 can pass through the second air inlet) and a second air outlet (the second hot airflow 1006 is discharged from the second air outlet to the second chamber). The end of the first isolator 5 with the second air inlet abuts against the side of the outer casing 1 with the second cold grid hole 102. The second cold grid hole 102, the second air inlet, the second chamber, and the second air outlet are sequentially connected and form a second airflow channel in the second direction 1002.

[0056] Specifically, the second airflow channel allows the cold airflow 1009 of the electronic device to pass more concentratedly through the electronic device 32 on the circuit board 31, thereby more effectively dissipating heat from several electronic devices 32 and improving the heat dissipation effect of the electronic device 32 on the circuit board 31.

[0057] In addition, the cooling fan 4 is installed inside the housing 1 and located at the heat dissipation grid hole 103. The cooling fan 4 can drive gas to flow from the first airflow channel and the second airflow channel to the heat dissipation grid hole 103.

[0058] In addition, the cooling fan 4 mentioned above is a suction fan, and the cooling fan 4 is located above the cell support 21. The cooling fan 4 can be used to force the pressure inside the housing 1 to be less than the pressure outside the housing 1, so as to form a negative pressure above the cell support 21.

[0059] It should be noted that when a negative pressure is formed above the cell support 21, the first cold airflow 1004 can be drawn into the first chamber more effectively, the second cold airflow 1005 can be drawn to the electronic device 32 more effectively, and the second hot airflow 1006 and the battery module hot airflow 1007 can be discharged to the outside of the casing 1 more effectively.

[0060] In some embodiments, such as Figure 1 and Figure 2 As shown, the first isolation element 5 includes: a top air duct plate 51 and a pair of side air duct plates 52.

[0061] In this embodiment, the top air duct plate 51 and the cell support 21 are arranged vertically along the first direction 1001. A pair of side air duct plates 52 are arranged between the top air duct plate 51 and the cell support 21. One end of each side air duct plate 52 abuts against the top air duct plate 51, and the other end of each side air duct plate 52 abuts against the circuit board 31 on which the electronic device 32 is deployed.

[0062] In some embodiments, combined with Figure 1 , Figure 4 and Figure 5 It can be seen that the heat dissipation system also includes: the second isolation component 6.

[0063] Specifically, the second isolator 6 extends around the first air outlet 2102 of the cell support 21 and is used to support the first isolator 5 located on the circuit board 31. The perimeter of the second isolator 6 is smaller than the perimeter of the first air outlet 2102.

[0064] In some embodiments, refer to Figure 1 , Figure 4 and Figure 5 It can be seen that the circumferential edge of the circuit board 31 and the inner wall surface of the second isolation member 6 form an isolation area, and the isolation area can make the first airflow channel and the second airflow channel independent of each other, so as to restrict the gas in the first airflow channel from entering the second airflow channel.

[0065] In this embodiment, the heat dissipation system has independent first and second airflow channels, which allows the battery module and the electronic devices 32 on the circuit board 31 to dissipate heat independently. This avoids the mixing or crosstalk between the battery module hot airflow 1007 that carries away heat from the battery module and the second hot airflow that carries away heat from the electronic devices 32, thereby improving the overall heat dissipation efficiency and reliability of the energy storage device 100. This ensures that each battery cell 22 in the battery module can meet the high-rate discharge requirements, thereby increasing the output power of the energy storage device 100.

[0066] In summary, the cooling fan 4 can simultaneously dissipate heat from the battery module and the electronic components 32 on the circuit board 31, thereby achieving parallel heat dissipation of the battery module and the electronic components 32 on the circuit board 31, which in turn gives the energy storage device 100 a good heat dissipation effect. At this time, the energy storage device 100 has the advantage of simple structure.

[0067] It should be noted that the second isolator 6 can be used to position the circuit board 31, and can also be used to prevent crosstalk between the hot airflow 1007 of the battery module and the second cold airflow 1005, thereby avoiding the impact of the heat dissipation effect of the energy storage device 100 due to the chaotic flow field.

[0068] In some embodiments, the second isolation member 6 includes a first baffle 61 and a pair of second baffles 62.

[0069] The first baffle 61 and the pair of second baffles 62 both protrude from the upper surface of the cell support 21 where the first air outlet 2102 is provided, and the two ends of the first baffle 61 are respectively connected to the pair of second baffles 62.

[0070] In addition, the first dimension of the pair of second baffles in the length direction of the cell support 21 is smaller than the second dimension of the cell support 21 in the length direction.

[0071] In some embodiments, according to Figure 3 and Figure 5 It can be seen that the cell support 21 has a third air inlet 2103 on the side of the first direction 1001 near the second cold grid hole 102.

[0072] It should be noted that a portion of the gas flowing in from the second cold gate hole 102 flows to the electronic device 32 under the guidance of the second airflow channel, while another portion flows into the first chamber through the third air inlet 2103.

[0073] In summary, since the circuit board 31 is provided above the battery cell 22 on the side where the second cold grid hole 102 is located, the first cold airflow 1004 will encounter greater wind resistance when passing through the several battery cells 22 corresponding to the circuit board 31, resulting in a large temperature difference between the several battery cells 22 corresponding to the circuit board 31. Therefore, by opening a third air inlet 2103 on the right side of the cell support 21 (the right side is the side where the second cold grid hole 102 is located), the cold airflow 1010 of the battery module can pass through the right side of the cell support 21, thereby increasing the heat dissipation area of ​​each battery cell 22 and further improving the heat dissipation effect of each battery cell 22.

[0074] In some embodiments, by Figure 5 It can be seen that the heat dissipation system also includes: dust filter 8.

[0075] It is understood that the dustproof net 8 is installed between the lower surface of the cell support 21 where the first air inlet 2101 is located and the bottom surface of the outer casing 1, and can cover the first cold grid hole 101 and the first air inlet 2101 to restrict external impurities from entering the first chamber.

[0076] In this embodiment, the dustproof mesh 8 can effectively prevent foreign objects or dust from entering the interior of the housing 1 through the first cold grid hole 101 and affecting the battery module, circuit board 31 and electronic device 32 housed inside the housing 1.

[0077] In some embodiments, please refer to Figure 1 and Figure 2 The cooling system also includes: several feet 7.

[0078] Several foot pads 7 are disposed at the bottom of the outer casing 1 and are located on the outside of the outer casing 1.

[0079] In addition, the foot pad 7 has a preset target height in the first direction 1001 so that gas can flow into the first chamber from the first cold grid hole 101 through the first air inlet 2101 under preset conditions.

[0080] Furthermore, when several foot pads 7 are installed on the bottom of the housing 1 and the energy storage device 100 is placed on a flat surface such as a table or the ground, the foot pads 7 can raise the housing 1 so that there is a target height of 3mm to 8mm between the bottom of the housing 1 and the flat surface such as the table or the ground. This target height is conducive to the first cold airflow 1004 entering the interior of the cell support 21 from the bottom of the housing 1.

[0081] In some embodiments, such as Figure 2 and Figure 5 As shown, the battery cell support 21 is provided with a number of mounting posts 211, all of which protrude from the surface of the battery cell support 21 where the first air outlet 2102 is provided, and all of which are located within the second isolation member 6.

[0082] In this embodiment of the application, the circuit board 31 is fixed on a plurality of mounting posts 211, and there is a preset target distance between the circuit board 31 and the upper surface of the battery cell bracket 21 where the first air outlet 2102 is provided.

[0083] Specifically, with a target distance in the range of 10mm to 12mm, the wind resistance of the first cold airflow 1004 and the first hot airflow can be reduced during their flow to the cooling fan 4. This allows the first cold airflow 1004 to pass more smoothly through the battery cell 22 and the first hot airflow formed thereafter to flow more smoothly to the cooling fan 4. This can effectively improve the heat dissipation effect on each battery cell 22, so that each battery cell 22 can meet the requirements of high-rate discharge, thereby enabling the energy storage device 100 to obtain greater output power.

[0084] In this embodiment of the application, the first cold grid hole 101 is formed by a number of through holes with a preset diameter evenly arranged, and the preset diameter is in the range of Φ2mm to Φ5mm. This design allows the first cold airflow 1004 to more accurately carry away heat through the battery cell 22.

[0085] In some embodiments, the cooling fan 4 has a first side 401 and a second side 402 opposite to each other, and the first side 401 is close to the cell support 21.

[0086] It should be noted that there is a preset first dimension between the first side 401 and the second side 402 of the cooling fan 4, and there is a preset second dimension between the first side 401 and the lower surface of the circuit board 31.

[0087] Understandably, the second size is one-quarter to one-third the size of the first size.

[0088] In summary, one-quarter to one-third of the cooling fan 4 is recessed below the circuit board 31, meaning that the circuit board 31 can divide the cooling fan 4 into two parts. This allows the cooling fan 4 to not only draw out the hot airflow 1007 from the battery module to cool each battery cell 22 in the battery module, but also draw out a second hot airflow 1006 to cool several electronic devices 32, thereby achieving parallel heat dissipation of the battery module and the electronic devices 32 on the circuit board 31.

[0089] Combination Figures 1-8 It is understood that the energy storage device 100 includes: a battery module, a circuit board 31 with electronic devices 32, and the aforementioned heat dissipation system.

[0090] The battery module is housed in the first chamber of the cell support 21 in the heat dissipation system, and the gas flowing through the first airflow channel of the heat dissipation system carries away the heat from the battery module.

[0091] In addition, the electronic device 32 is housed in the second chamber of the first isolation member 5 of the heat dissipation system, and the gas flowing through the second airflow channel of the heat dissipation system can carry away the heat of the electronic device 32.

[0092] In some embodiments, refer to Figure 2 and Figure 5 It is known that the battery module includes: at least one layer of battery pack stacked along the first direction 1001 of the heat dissipation system.

[0093] In addition, each battery pack consists of several individual battery cells 22 arranged at a preset target spacing along the second direction 1002 of the heat dissipation system.

[0094] Specifically, the target spacing is in the range of 2mm to 5mm, which can reduce the wind resistance of the first cold airflow 1004 between each battery cell 22, so that the first cold airflow 1004 can pass through each battery cell 22 evenly, thereby ensuring the consistency of temperature rise of each battery cell 22, which can help improve the life and stability of the battery cell 22.

[0095] It should be noted that this energy storage device 100 is a small-capacity energy storage device, and therefore its output power is also relatively small. In order to increase the output power of the small-capacity energy storage device while keeping the number of battery cells 22 unchanged, users usually force the battery cells 22 to meet the high-rate discharge requirements. In other words, when each battery cell 22 in the battery module can meet the high-rate discharge requirements, the output power of this energy storage device 100 will be increased accordingly.

[0096] In this embodiment of the application, the user can improve the heat dissipation effect of each battery cell 22 by improving the overall heat dissipation effect of the energy storage device 100, so that the heat dissipation effect of the battery cell 22 can meet the expected requirements, thereby enabling the battery cell 22 to meet the requirements of high discharge rate.

[0097] It is understandable that the heat source of this energy storage device 100 mainly comes from the battery module and the electronic devices 32 on the circuit board 31. Therefore, parallel heat dissipation of the battery module and the electronic devices 32 on the circuit board 31 can effectively improve the overall heat dissipation effect of this energy storage device 100, thereby improving the heat dissipation effect of each battery cell 22 (the heat dissipation effect of each battery cell 22 will be improved along with the overall heat dissipation effect of this energy storage device 100). This will enable each battery cell 22 to better meet the requirements of high-rate discharge.

[0098] Since the capacity of this energy storage device 100 is small, the number of battery cells 22 used is small. At this time, the battery cells 22 can be placed flat. In other words, each layer of battery pack is composed of several battery cells 22 laid flat along the second direction 1002, and multi-layer battery packs can be stacked along the first direction 1001.

[0099] When the battery module contains only one layer of battery pack, the airflow speed between each battery cell 22 is uniform and sufficiently high; the airflow speed between each battery cell 22 is between 2.4 m / s and 2.9 m / s; in addition, the temperature distribution between each battery cell 22 is also relatively uniform; furthermore, the average temperature of the battery module containing only one layer of battery pack is 46.78℃, the lowest temperature of the battery module containing only one layer of battery pack is 46.3℃, and the highest temperature of the battery module containing only one layer of battery pack is 47.49℃, so the maximum temperature difference of the battery module containing only one layer of battery pack is 1.19℃.

[0100] When the battery module contains two or more battery packs, the airflow velocity between each battery cell 22 is sufficiently high; specifically, the airflow velocity between each battery cell 22 is between 1.5 m / s and 3 m / s. Furthermore, the airflow velocity between each battery cell 22 in the upper battery pack is lower than that between each battery cell 22 in the lower battery pack. Additionally, the airflow velocity between each battery cell 22 at the location corresponding to the circuit board 31 in the multi-layer battery pack is 0.1 m / s to 1.0 m / s lower than in other locations. Moreover, the temperature distribution between each battery cell 22 is basically uniform. The average temperature of the battery module containing two or more battery packs is approximately 45.94℃, the lowest temperature is 44.7℃, and the highest temperature is 47.87℃. Therefore, the maximum temperature difference of the battery module containing two or more battery packs is 3.17℃.

[0101] In summary, since the maximum temperature difference of a battery module containing only one battery pack is greater than that of a battery module containing two or more battery packs, we can conclude that "the more layers of the battery pack, the greater the temperature difference of the battery module." This is because the first cold airflow 1004 passes through multiple battery packs from bottom to top. The higher the battery pack, the greater the air resistance to the first cold airflow 1004. This leads to uneven heat dissipation between the battery packs, resulting in a decrease in the airflow speed of the first cold airflow 1004 as it rises. Consequently, the higher the battery pack, the worse its heat dissipation effect. At this point, the temperature of the higher battery pack will be higher. Therefore, the more layers of the battery pack, the greater the temperature difference of the battery module.

[0102] Specifically, in order to solve the problem of increased temperature difference caused by the increase in the number of battery layers, an external fan can be installed at the bottom of the casing 1 to effectively increase the wind speed of the first cold airflow 1004 between each battery cell 22, thereby improving the heat exchange efficiency of each battery cell 22 and reducing the temperature difference of the battery module.

[0103] This energy storage device 100 not only improves the cooling performance of each battery cell 22, but also keeps the temperature of battery cells 22 in different locations uniform, reducing the temperature difference between different layers of battery packs within the battery module, or in other words, reducing the temperature difference between individual battery cells 22. This can effectively extend the cycle life of the battery cells 22 and increase the energy density of the battery cells 22 (when each battery cell can meet the high-rate discharge requirements, the energy density of the battery cells 22 will be improved), thereby improving the various performance characteristics of this energy storage device 100.

[0104] In some embodiments, such as Figure 1 , Figure 2 and Figure 5As shown, the outer shell 1 includes an upper shell 11 and a lower shell 12; a handle 111 is provided on the upper shell 11, which can be held by the user to make the energy storage device 100 easy to carry, thereby improving the portability of the energy storage device 100; a first cold grid hole 101 penetrates the inner bottom surface and the outer bottom surface of the lower shell 12, and several feet 7 are provided on the outer bottom surface of the lower shell 12.

[0105] In some embodiments, according to Figure 1 , Figure 2 and Figure 5 It is known that a support frame 104 is provided inside the outer shell 1, and the support frame is located at the corresponding position of the heat dissipation grid hole 103; and the support frame 104 is divided into two parts at the joint edge 105 of the upper shell 11 and the lower shell 12. One part of the support frame located in the upper shell 11 is called the first support part 1041, and the other part of the support frame located in the lower shell 12 is called the second support part 1042.

[0106] Combination Figures 1-8 It can be seen that the structural assembly of this energy storage device 100 includes, but is not limited to, the following steps:

[0107] (1) A number of battery cells 22 are evenly arranged along the second direction 1002 at a preset target spacing to form a battery pack, and at least one battery pack is stacked inside the cell support 21 along the first direction 1001 to form a battery module.

[0108] (2) Fix the dustproof net 8 to the lower surface of the battery cell bracket 21, and at least part of the dustproof net 8 can cover the first air inlet 2101.

[0109] (3) The circuit board 31 with several electronic devices 32 is fixedly assembled on the mounting post 211 by several screws 301. At this time, the lower surface of the circuit board 31 abuts against the end of the mounting post 211 away from the first air outlet 2102.

[0110] (4) Fix one end of a pair of side air duct plates 52 to the upper surface of the circuit board 31, and cover the other end of the pair of side air duct plates 52 with the top air duct plate 51.

[0111] (5) Install the cell bracket 21 on the inner bottom surface of the lower shell 12, and install the circuit board 31 with the first isolation member 5 and electronic device 32 on the mounting post 211 of the cell bracket 21, and the first air inlet 2101 corresponds to the first cold grid hole 101. At this time, at least a part of the dustproof net 8 can cover the first cold grid hole 101.

[0112] (6) Place the cooling fan 4 on the second support 1042. At this time, the second side 402 of the cooling fan 4 abuts against the bottom surface 1043 of the second support 1042 away from the joint edge 105 of the upper shell 11 and the lower shell 12 in the first direction 1001; then attach foam 9 to the first side 401 of the cooling fan 4.

[0113] (7) The upper shell 11 is placed on the lower shell 12. At this time, the first support part 1041 presses the foam 9 on the upper bottom surface 1044 away from the joint edge 105 of the upper shell 11 and the lower shell 12 in the first direction.

[0114] In summary, the energy storage device 100 can be assembled after the above steps.

[0115] It should be noted that, since the foam 9 has a preset interference amount, the upper bottom surface 1044 of the first support part 1041, which is away from the joint edge 105 of the upper shell 11 and the lower shell 12 in the first direction, squeezes the foam 9 so that the cooling fan 4 can be more stably and reliably fixed on the support frame 104.

[0116] It is understood that the outer casing 1 has a mounting port 106 for fixing and assembling the front panel 10 on the side of the third direction 1003 away from the handle 111; wherein the third direction 1003, the second direction 1002 and the first direction 1001 are orthogonal to each other.

[0117] For ease of understanding and explanation, since both the first and third hot air flows out from the first air outlet 2102, the hot air mixed with the first and third hot air can be called the battery module hot air 1007; since the cooling fan 4 can discharge both the battery module hot air 1007 and the second hot air 1006 from the heat dissipation grid hole 103, the hot air drawn out by the cooling fan 4 can be called the combined hot air 1008; the portion of the second cold air 1005 flowing to the electronic device 32 is called the electronic device cold air 1009 (this electronic device cold air 1009 can remove the heat from the electronic device 32); the portion of the second cold air 1005 flowing to the third air inlet 2103 is called the battery module cold air 1010 (this battery module cold air 1010 can further remove the heat from the battery cell 22).

[0118] In summary, the heat dissipation system and energy storage device provided by this utility model embodiment are novel. By incorporating a first airflow channel, a second airflow channel, and a first insulating component, the heat dissipation system enables parallel heat dissipation between the battery module and the electronic components on the circuit board, effectively improving the overall heat dissipation efficiency of the energy storage device. This ensures the battery module achieves the expected heat dissipation performance, enabling it to meet high-rate discharge requirements and thus increasing the output power of the energy storage device. Therefore, the heat dissipation system and energy storage device provided by this utility model embodiment are novel compared to traditional heat dissipation systems and energy storage devices.

[0119] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and all of these fall within the protection scope of the present invention.

Claims

1. A heat dissipation system, characterized in that, include: The outer casing has a first cold grid hole at its bottom in a first direction, and a second cold grid hole and a heat dissipation grid hole on opposite sides in a second direction, wherein the first direction and the second direction are perpendicular to each other. A cell support is placed inside the housing and forms a first chamber that can accommodate a battery module. The cell support has a first air inlet and a first air outlet on opposite sides in the first direction. The first cold grid hole, the first air inlet, the first chamber and the first air outlet are sequentially connected to form a first airflow channel in the first direction. The first isolator has a second chamber inside it for accommodating electronic devices on the circuit board. The first isolator is located inside the housing and is spaced apart from the cell support in the first direction. The first isolator has a second air inlet and a second air outlet at its two opposite ends in the second direction. The end of the first isolator with the second air inlet abuts against the side of the housing with the second cold grid hole. The second cold grid hole, the second air inlet, the second chamber, and the second air outlet are sequentially connected and form a second airflow channel in the second direction. A cooling fan is disposed inside the housing and located at the heat dissipation grid hole. The cooling fan can drive gas to flow from the first airflow channel and the second airflow channel to the heat dissipation grid hole.

2. The heat dissipation system according to claim 1, characterized in that, The first isolation element includes: a top air duct plate and a pair of side air duct plates; The top air duct plate and the cell support are arranged vertically along the first direction. A pair of side air duct plates are arranged between the top air duct plate and the cell support. One end of each side air duct plate abuts against the top air duct plate, and the other end of each side air duct plate abuts against the circuit board on which the electronic device is deployed.

3. The heat dissipation system of claim 1, wherein, The heat dissipation system further includes: a second isolation component; The second isolator extends around the periphery of the first air outlet of the cell bracket and is used to support the first isolator located on the circuit board. The perimeter of the second isolator is smaller than the perimeter of the first air outlet.

4. The heat dissipation system according to claim 3, characterized in that, The circumferential edge of the circuit board and the inner wall of the second isolation member form an isolation area, and the isolation area allows the first airflow channel and the second airflow channel to be independent of each other, so as to restrict the gas in the first airflow channel from entering the second airflow channel.

5. The heat dissipation system according to claim 1, characterized in that, The cell support has a third air inlet on the side of the cell support that is close to the second cold grid hole in the first direction; A portion of the gas flowing in from the second cold grid hole is guided to the electronic device by the second airflow channel, while another portion flows into the first chamber through the third air inlet.

6. The heat dissipation system of claim 1, wherein, Also includes: A dustproof net is installed between the lower surface of the battery cell bracket where the first air inlet is located and the bottom surface of the outer casing. It can cover the first cold grid hole and the first air inlet to restrict external impurities from entering the first chamber.

7. The heat dissipation system according to claim 1, characterized in that, Also includes: A plurality of foot pads; all of the foot pads are disposed at the bottom of the housing and located on the outside of the housing; The foot pad has a preset target height in the first direction, so that gas can flow into the first chamber from the first cold grid hole through the first air inlet under preset conditions.

8. The heat dissipation system according to claim 3, characterized in that, The battery cell support is provided with a plurality of mounting posts, all of which protrude from the surface of the battery cell support where the first air outlet is provided, and all of which are located within the second insulating member; The circuit board is fixed on several mounting posts, and there is a preset target distance between the circuit board and the upper surface of the battery cell bracket where the first air outlet is located.

9. An energy storage device, characterized by, include: A battery module, a circuit board with electronic components, and a heat dissipation system as described in any one of claims 1-8; The battery module is housed in the first chamber of the cell support in the heat dissipation system, and the gas flowing through the first airflow channel of the heat dissipation system carries away the heat of the battery module. The electronic device is housed in the second chamber of the first isolation member in the heat dissipation system, and the gas flowing through the second airflow channel of the heat dissipation system can carry away the heat of the electronic device.

10. The energy storage device of claim 9, wherein, The battery module includes: at least one layer of battery pack stacked along a first direction of the heat dissipation system; Each layer of the battery pack consists of several individual battery cells arranged along the second direction of the heat dissipation system at a preset target spacing.

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