Energy storage device
By introducing flow guides and a multi-fan system into the energy storage device, combined with sealed connections and heat dissipation channels, the problem of heat accumulation in the battery module is solved, achieving efficient heat dissipation and improved safety.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- XIAMEN AMPACK TECH LTD
- Filing Date
- 2024-12-18
- Publication Date
- 2026-06-25
AI Technical Summary
As the number and size of battery modules increase, the heat accumulation problem in energy storage devices leads to insufficient heat dissipation capacity, affecting safety.
Design an energy storage device that employs a flow guide and fan system. Through a combination of air inlet, opening, heat dissipation channel and air outlet, it utilizes refrigerant for efficient heat dissipation. Furthermore, it uses sealed connections and multiple fans to regulate the refrigerant flow and uniformly cool the battery module.
It improves the heat dissipation efficiency and safety of energy storage devices, ensures uniform battery module temperature, reduces refrigerant loss, and enhances overall energy efficiency.
Smart Images
Figure CN2024140337_25062026_PF_FP_ABST
Abstract
Description
Energy storage devices Technical Field
[0001] This application relates to the field of energy storage technology, and in particular to an energy storage device. Background Technology
[0002] Energy storage devices are used to provide electrical energy to electrical devices. Energy storage devices typically include a housing and multiple battery modules located inside the housing.
[0003] To enhance the energy storage capacity of energy storage devices, the number of battery modules is gradually increasing, and the size of these modules is becoming larger, resulting in more and more heat being generated during operation. Therefore, how to effectively improve the heat dissipation capacity of energy storage devices to enhance their safety has always been a research focus in the industry. Summary of the Invention
[0004] This application provides an energy storage device that improves safety.
[0005] In a first aspect, embodiments of this application provide an energy storage device, including a housing, multiple battery modules, a heat guide, and a fan. The housing has an air inlet and an air outlet. The multiple battery modules are disposed inside the housing and arranged along a first direction. A first heat dissipation channel is located between adjacent battery modules, and the first heat dissipation channel connects the air inlet and the air outlet. The heat guide is disposed inside the housing and includes a base and a side portion connected to the base. The side portion is located on the side of the base facing the battery modules. The base has an opening along a second direction. The base and the battery modules are spaced apart, and the first direction is perpendicular to the second direction. The fan is configured to direct refrigerant through the air inlet, the opening, the first heat dissipation channel, and the air outlet.
[0006] In one or more of the above optional embodiments, the side portion is disposed around the base portion, and the base portion and the side portion form a recess, the recess facing the first heat dissipation channel.
[0007] In one or more of the above alternative embodiments, the side and the battery module are sealed together.
[0008] In one or more of the above optional embodiments, the flow guide includes an extension connected to the side; a seal is provided between the extension and the battery module, and the seal connects the extension and the battery module.
[0009] In one or more of the above optional embodiments, a gap of less than 5 mm is provided between the side portion and the battery module along the second direction.
[0010] In one or more of the above optional embodiments, the housing includes a bottom wall and a top wall disposed opposite to each other along a first direction, a second heat dissipation channel is provided between the battery module and the top wall, and / or a third heat dissipation channel is provided between the battery module and the bottom wall.
[0011] In one or more of the above optional embodiments, the side is sealed to the top wall, the battery module, and the bottom wall.
[0012] In one or more of the above optional embodiments, the flow guide includes an extension connected to the side; the energy storage device includes a seal that connects the extension to the battery module, the extension to the top wall, and the extension to the bottom wall.
[0013] In one or more of the above optional embodiments, a gap of less than 5 mm is provided between the side portion and the battery module along the second direction; and / or a gap of less than 5 mm is provided between the side portion and the top wall along the second direction; and / or a gap of less than 5 mm is provided between the side portion and the bottom wall along the second direction.
[0014] In one or more of the above optional embodiments, the side portion includes a first wall, a second wall, a third wall and a fourth wall that are in contact with each other. The first wall and the third wall are opposite each other along a first direction, and the second wall and the fourth wall are opposite each other along a third direction. The first direction, the second direction and the third direction are perpendicular to each other.
[0015] In one or more of the above optional embodiments, the air guide includes an isolation portion connected to the base and located within the recess, the isolation portion dividing the recess into at least two chambers; multiple fans are provided, each fan communicating with one chamber, and each first heat dissipation channel facing one chamber.
[0016] In one or more of the above optional embodiments, the isolation portion includes a first isolation portion and a second isolation portion, which divide the recess to form a first sub-chamber, a second sub-chamber, and a third sub-chamber; the opening includes a first opening, a second opening, and a third opening, the first opening communicating with the first sub-chamber, the second opening communicating with the second sub-chamber, and the third opening communicating with the third sub-chamber; the fan includes a first fan, a second fan, and a third fan, the first fan being configured to allow refrigerant to pass through an air inlet, a first opening, a first sub-chamber, a first heat dissipation channel, and an air outlet, the second fan being configured to allow refrigerant to pass through an air inlet, a second opening, a second sub-chamber, a first heat dissipation channel, and an air outlet, and the third fan being configured to allow refrigerant to pass through an air inlet, a third opening, a third sub-chamber, a first heat dissipation channel, and an air outlet.
[0017] In one or more of the above optional embodiments, the operating output power of the second fan is greater than that of the first fan, and the operating output power of the second fan is greater than that of the third fan.
[0018] In one or more of the above optional embodiments, the housing includes a front wall and a rear wall disposed opposite to each other along a second direction; the front wall is disposed opposite to the air guide and the air inlet is disposed on the front wall; the air inlet is disposed opposite to the fan and the fan is fixed to the air guide; the air outlet is disposed on the rear wall.
[0019] In one or more of the above optional embodiments, the battery module has a pressure relief section facing the rear wall and disposed opposite to the air outlet.
[0020] In one or more of the above optional embodiments, the battery module has a first protrusion and a second protrusion spaced apart along a third direction, the first protrusion and the second protrusion being located within a first heat dissipation channel; the projection of the first protrusion along a second direction and the projection of the second protrusion along a second direction are located on both sides of the projection of the guide member along the second direction.
[0021] In one or more of the above optional embodiments, among the adjacent battery modules, the first protrusion and the second protrusion of one battery module are connected to the other battery module.
[0022] In one or more of the above optional embodiments, the length of the first heat dissipation channel along the first direction is 5 mm to 20 mm.
[0023] In one or more of the above optional embodiments, the battery module includes a housing: a plurality of battery cells disposed inside the housing, the battery cells being spaced apart along a third direction.
[0024] In one or more of the above optional embodiments, the energy storage device includes an electrical module located outside the housing and electrically connected to the battery module. Attached Figure Description
[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application.
[0026] Figure 1 is a schematic diagram of the structure of an energy storage device provided in some embodiments of this application;
[0027] Figure 2 is another structural schematic diagram of the energy storage device provided in some embodiments of this application;
[0028] Figure 3 is an exploded view of an energy storage device provided in some embodiments of this application;
[0029] Figure 4 is a schematic diagram of the flow guide structure of an energy storage device provided in some embodiments of this application;
[0030] Figure 5 is yet another exploded view of the energy storage device provided in some other embodiments of this application;
[0031] Figure 6 is yet another structural schematic diagram of the flow guide of the energy storage device provided in some other embodiments of this application;
[0032] Figure 7 shows another structural schematic diagram of the energy storage device provided in some embodiments of this application;
[0033] Figure 8 is a schematic diagram of the structure of the battery module of the energy storage device provided in some embodiments of this application;
[0034] Figure 9 is a layout diagram of the battery module of the energy storage device provided in some embodiments of this application;
[0035] Figure 10 is a schematic diagram of the internal structure of the battery module of the energy storage device provided in some embodiments of this application.
[0036] The reference numerals in the detailed embodiments are as follows: 1. Outer casing; 11. Front wall; 111. Air inlet; 12. Rear wall; 121. Air outlet; 13. Top wall; 14. Bottom wall; 2. Battery module; 2a. Battery module; 2b. Battery module; 21. Battery cell; 22. Casing; 23. Pressure relief section; 24. First protrusion; 25. Second protrusion; 31. First heat dissipation channel; 32. Second heat dissipation channel; 33. Third heat dissipation channel; 4. Guide component; 41. Base; 411. Opening; 411a. First opening; 411b. Second opening; 411c. Third opening; 42. Side; 421. First wall; 422. Second wall; 423. Third wall; 424. Fourth wall; 43. Extension; 431. First extension; 432. Second extension; 433. Third extension; 434. Fourth extension; 44. Recess; 441. First sub-chamber; 442. Second sub-chamber; 443. Third sub-chamber; 45. Isolation section; 451. First isolation section; 452. Second isolation section; 5. Fan; 51. First fan; 52. Second fan; 53. Third fan; 6. Electrical module; X. First direction; Y. Second direction; Z. Third direction. Detailed Implementation
[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.
[0038] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.
[0039] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.
[0040] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0041] In the embodiments of this application, "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering. For example, if the angle between two directions is 80° to 90°, the two directions can be considered perpendicular; if the angle between two directions is 0° to 10°, the two directions can be considered parallel.
[0042] The energy storage device of this application is described below with reference to the accompanying drawings.
[0043] As shown in Figures 1 to 3, this application provides an energy storage device, which includes a housing 1 and multiple battery modules 2. The multiple battery modules 2 are disposed inside the housing 1 and are arranged along a first direction X. The housing 1 is provided with an air inlet 111 and an air outlet 121.
[0044] In some embodiments, the energy storage device includes a first heat dissipation channel 31, which is located between adjacent battery modules 2. Optionally, a first heat dissipation channel 31 is provided between all adjacent battery modules 2. Optionally, a first heat dissipation channel 31 is provided between some adjacent battery modules 2. The first heat dissipation channel 31 connects the air inlet 111 and the air outlet 121; refrigerant can enter the first heat dissipation channel 31 through the air inlet 111 and flow out through the air outlet 121 to cool the battery modules 2.
[0045] Alternatively, the refrigerant may be cooled air, ambient air, or other ambient or cooled gases other than air.
[0046] In some embodiments, the energy storage device includes a flow guide 4 disposed within the housing 1. The flow guide 4 is located between the battery module 2 and the air inlet 111. The flow guide 4 includes a base 41 and a side portion 42 connected to the base 41. The side portion 42 is located on the side of the base 41 facing the battery module 2 and extends in a direction close to the battery module 2. The base 41 has an opening 411 that penetrates the base 41. After entering the housing 1 through the air inlet 111, the refrigerant passes through the opening 411 and reaches the space between the flow guide 4 and the battery module 2. The flow guide 4 can concentrate the refrigerant entering the housing 1, reduce the refrigerant from entering other gaps, increase the refrigerant flow rate into the first heat dissipation channel 31, and improve the heat dissipation effect on the battery module 2.
[0047] In some embodiments, the energy storage device includes a fan 5, which is configured to allow refrigerant to pass through an air inlet 111, an opening 411, a first heat dissipation channel 31, and an air outlet 121. By setting up the fan, the flow rate of the refrigerant can be increased, thereby improving the heat dissipation effect on the battery module 2.
[0048] Optionally, the fan 5 can promote the flow of refrigerant by blowing air or by absorbing air. In this embodiment, blowing air is used as an example for illustration.
[0049] As shown in Figures 3 to 6, in some embodiments, the side portion 42 is disposed around the base portion 41, and the base portion 41 and the side portion 42 together form a recess 44, which faces the first heat dissipation channel 31. By providing the recess 44, the volume of the space between the guide member 4 and the battery module 2 for collecting the refrigerant can be increased, providing space for the collection of the refrigerant. Optionally, the side portion 42 is disposed around the edge of the base portion 41. The fan 5 includes fan blades, which are the air supply elements of the fan 5. The refrigerant is transported by the rotation of the fan blades. The fan blades are located in the recess 44, which can promote the flow of refrigerant into the recess 44. After flowing through the space between the guide member 4 and the battery module 2, the refrigerant enters the first heat dissipation channel 31 to cool the battery module 2.
[0050] In some embodiments, the side portion 42 has a rectangular ring structure and includes a first wall 421, a second wall 422, a third wall 423, and a fourth wall 424 that are in contact. The first wall 421, the second wall 422, the third wall 423, and the fourth wall 424 are connected to the base portion 41. The third wall 423 and the first wall 421 are arranged opposite each other along a first direction X, and the fourth wall 424 and the second wall 422 are arranged opposite each other along a third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.
[0051] In some embodiments, the first wall 421, the second wall 422, the third wall 423, the fourth wall 424 and the base 41 surround to form a recess 44.
[0052] In some embodiments, the first wall 421, the second wall 422, the third wall 423, the fourth wall 424 and the base 41 are integrally formed, which has good structural strength.
[0053] In some embodiments, the side portion 42 and the battery module 2 are sealed together, further reducing the loss of refrigerant entering the housing 1.
[0054] In some embodiments, the side portion 42 and the battery module 2 are provided with a seal (not shown), and the side portion 42 and the battery module 2 are sealed together by the seal. The seal includes, but is not limited to, adhesive, sealing rings, compressed elastic elements, such as silicone sealing rings, or foam.
[0055] In some embodiments, the side portion 42 and the battery module 2 are in contact connection to achieve a sealed connection.
[0056] As shown in Figures 4 and 6, in some embodiments, the flow guide 4 includes an extension 43 connected to the side portion 42. A seal 46 is provided between the extension 43 and the battery module 2, connecting the extension 43 and the battery module 2. The side portion 42 and the battery module 2 are sealed together by the extension 43 and the seal 46. The seal 46 includes, but is not limited to, adhesive, sealing rings, and compressed elastic elements, such as silicone sealing rings or foam. Optionally, the seal 46 is bonded to the extension 43 and to the battery module 2 to improve the sealing effect between the flow guide 4 and the battery module 2. In other embodiments, the seal 46 is in contact with the extension 43 and the battery module 2, and the seal 46 is in a compressed state.
[0057] In some embodiments, a gap of less than 5 mm is provided between the side portion 42 and the battery module 2 along the second direction Y to reduce the outflow of refrigerant from the gap.
[0058] As shown in Figures 4 and 6, in some embodiments, the flow guide 4 includes an isolation portion 45, which is connected to the base 41 and located within the recess 44. The isolation portion 45 divides the recess 44 into at least two sub-chambers. By dividing the recess 44 into at least two sub-chambers, the accumulation of refrigerant within the recess 44 and the resulting turbulence can be reduced. This is beneficial for improving the pressure balance of the refrigerant after it accumulates between the flow guide 4 and the battery module 2, resulting in a more uniform flow rate of the refrigerant into each of the first heat dissipation channels 31, thereby improving the heat dissipation uniformity of the battery module 2.
[0059] Multiple fans 5 are provided, and each fan 5 is configured to supply refrigerant into the interior of a sub-chamber. Each first heat dissipation channel 31 faces a sub-chamber, and the refrigerant entering each sub-chamber flows into the connected first heat dissipation channel 31 to dissipate heat from the battery module 2. For example, two first heat dissipation channels 31 may face the same sub-chamber.
[0060] By dividing the recess 44 into at least two sub-chambers, the speed of each fan 5 can be adjusted individually, thereby adjusting the total amount of refrigerant entering each sub-chamber, and adjusting the flow rate of the refrigerant in the corresponding first heat dissipation channel 31 to meet the heat dissipation requirements of different parts of the battery module 2.
[0061] As shown in Figures 4 and 6, in some embodiments, the isolation portion 45 includes a first isolation portion 451 and a second isolation portion 452. The first isolation portion 451 and the second isolation portion 452 divide the recess 44 to form a first sub-chamber 441, a second sub-chamber 442 and a third sub-chamber 443. The first sub-chamber 441, the second sub-chamber 442 and the third sub-chamber 443 are arranged along a first direction X.
[0062] As shown in Figures 3 to 6, in some embodiments, the opening 411 includes a first opening 411a, a second opening 411b, and a third opening 411c. The first opening 411a is connected to the first sub-chamber 441, the second opening 411b is connected to the second sub-chamber 442, and the third opening 411c is connected to the third sub-chamber 443.
[0063] In some embodiments, as shown in Figures 3 and 5, fan 5 includes a first fan 51, a second fan 52, and a third fan 53. The first fan 51 is configured to allow refrigerant to pass through an air inlet 111, a first opening 411a, a first sub-chamber 441, a first heat dissipation channel 31, and an air outlet 121. The second fan 52 is configured to allow refrigerant to pass through an air inlet 111, a second opening 411b, a second sub-chamber 442, the first heat dissipation channel 31, and an air outlet 121. The third fan 53 is configured to allow refrigerant to pass through an air inlet 111, a third opening 411c, a third sub-chamber 443, the first heat dissipation channel 31, and an air outlet 121.
[0064] As shown in Figure 5, the first fan 51 is also configured to allow refrigerant to pass through the air inlet 111, the first opening 411a, the first sub-chamber 441, the third heat dissipation channel 33 and the air outlet 121, and the third fan 53 is also configured to allow refrigerant to pass through the air inlet 111, the third opening 411c, the third sub-chamber 443, the second heat dissipation channel 32 and the air outlet 121.
[0065] In some embodiments, by adjusting the speed of the first fan 51, the total amount of refrigerant flowing into the first sub-chamber 441 can be adjusted, thereby controlling the flow rate of refrigerant in the first heat dissipation channel 31 connected to the first sub-chamber 441.
[0066] In some embodiments, by adjusting the speed of the second fan 52, the total amount of refrigerant flowing into the second sub-chamber 442 can be adjusted, thereby controlling the flow rate of the refrigerant in the first heat dissipation channel 31 connected to the second sub-chamber 442.
[0067] In some embodiments, by adjusting the speed of the third fan 53, the total amount of refrigerant flowing into the third sub-chamber 443 can be adjusted, thereby controlling the flow rate of the refrigerant in the first heat dissipation channel 31 connected to the third sub-chamber 443.
[0068] Based on the heat generation at various points in the energy storage device, the cooling scheme was adjusted to improve the cooling effect on battery module 2 while simultaneously increasing energy efficiency.
[0069] In some embodiments, opening 411 can be an opening through which the first fan 51, the second fan 52, and the third fan 53 deliver refrigerant to the first heat dissipation channel 31.
[0070] In some embodiments, the operating output power of the second fan 52 is greater than that of the first fan 51. The operating output power of the second fan 52 is greater than that of the third fan 53. Each of the first heat dissipation channels 31 communicating with the second sub-chamber 442 is formed between the battery modules 2 located at the middle position of the outer casing 1 along the first direction X. The heat of the battery modules 2 at this location is not easily dissipated, and the temperature is relatively high. Therefore, the operating output power of the second fan 52 is greater than that of the first fan 51, and the operating output power of the second fan 52 is greater than that of the third fan 53. This can improve the heat dissipation efficiency of each battery module 2 at this location and improve the overall safety of the energy storage device.
[0071] This application uses the air supply of fan 5 as an example for explanation. The operating output power of the second fan 52 is greater than that of the first fan 51, and the operating output power of the second fan 52 is greater than that of the third fan 53. This can be understood as the air supply volume of the second fan 52 being greater than that of the first fan 51, and the air supply volume of the second fan 52 being greater than that of the third fan 53.
[0072] As shown in Figure 7, in some embodiments, the outer casing 1 includes a front wall 11 and a rear wall 12 disposed opposite to each other along the second direction Y. An air inlet 111 may be formed on the front wall 11, penetrating the front wall 11 along the second direction Y. An air outlet 121 is formed on the rear wall 12, penetrating the rear wall along the second direction Y, allowing refrigerant to circulate. Optionally, when the air inlet 111 is formed on the front wall 11, a dust filter is provided at the air inlet 111. Optionally, when the air outlet 121 is formed on the rear wall 12, a dust filter is provided at the air outlet 121. By providing a dust filter, dust and impurities from the external environment can be reduced from entering the interior of the outer casing 1, maintaining the cleanliness of the interior of the outer casing 1.
[0073] In some embodiments, the front wall 11 is disposed opposite to the air guide 4, the fan 5 is fixed to the air guide 4, and the air inlet 111 is disposed opposite to the fan 5, so that the refrigerant passes through the air inlet 111 and the opening 411 on the front wall 11 to reach the space between the air guide 4 and the battery module 2.
[0074] As shown in Figure 2, in some embodiments, the first fan 51 is exposed through the first opening 411a, the second fan 52 is exposed through the second opening 411b, and the third fan 53 is exposed through the third opening 411c.
[0075] As shown in Figures 5 and 6, which illustrate another embodiment, the outer casing 1 includes a bottom wall 14 and a top wall 13 arranged opposite each other along a first direction X. A second heat dissipation channel 32 is provided between the battery module 2 and the top wall 13, wherein the battery module 2 is the uppermost battery module 2a. When the refrigerant flows through the second heat dissipation channel 32, it can dissipate heat from the battery module 2 near the top wall 13.
[0076] As shown in Figures 5 and 6, in some embodiments, a third heat dissipation channel 33 is provided between the battery module 2 and the bottom wall 14, wherein the battery module 2 is the bottommost battery module 2b. When the refrigerant flows through the third heat dissipation channel 33, it can dissipate heat from the battery module 2 near the bottom wall 14.
[0077] In some embodiments, fan 5 includes a first fan 51, a second fan 52, and a third fan 53. The first fan 51 is configured to allow refrigerant to pass through an air inlet 111, a first opening 411a, a first sub-chamber 441, a first heat dissipation channel 31, a third heat dissipation channel 33, and an air outlet 121. The second fan 52 is configured to allow refrigerant to pass through an air inlet 111, a second opening 411b, a second sub-chamber 442, a first heat dissipation channel 31, and an air outlet 121. The third fan 53 is configured to allow refrigerant to pass through an air inlet 111, a third opening 411c, a third sub-chamber 443, a first heat dissipation channel 31, a second heat dissipation channel 32, and an air outlet 121.
[0078] In some embodiments, by adjusting the speed of the first fan 51, the total amount of refrigerant flowing into the first sub-chamber 441 can be adjusted, thereby controlling the flow rate of refrigerant in the first heat dissipation channel 31 and the third heat dissipation channel 33 connected to the first sub-chamber 441.
[0079] In some embodiments, by adjusting the speed of the second fan 52, the total amount of refrigerant flowing into the second sub-chamber 442 can be adjusted, thereby controlling the flow rate of the refrigerant in the first heat dissipation channel 31 connected to the second sub-chamber 442.
[0080] In some embodiments, by adjusting the speed of the third fan 53, the total amount of refrigerant flowing into the third sub-chamber 443 can be adjusted, thereby controlling the flow rate of the refrigerant in the first heat dissipation channel 31 and the second heat dissipation channel 32 connected to the third sub-chamber 443.
[0081] Based on the heat generation at various points in the energy storage device, the cooling scheme was adjusted to improve the cooling effect on battery module 2 while simultaneously increasing energy efficiency.
[0082] As shown in Figures 5 and 6, in some embodiments, side 42 is sealed to top wall 13, sealed to battery module 2, and sealed to bottom wall 14. This further reduces the loss of refrigerant entering the housing 1.
[0083] The side portion 42 can be simultaneously connected to the battery module 2, the bottom wall 14, and the top wall 13 by adjusting the length of the guide member 4 along the first direction X. For example, when the side portion 42 is only connected to the battery module 2, the length of the guide member 4 along the first direction X is H1, and when the side portion 42 is simultaneously connected to the battery module 2, the bottom wall 14, and the top wall 13, the length of the guide member 4 along the first direction X is H2, where H2 is greater than H1.
[0084] In some embodiments, the side portion 42 and the battery module 2 are provided with a seal (not shown), and the side portion 42 and the battery module 2 are sealed together by the seal. The seal includes, but is not limited to, adhesive, sealing rings, compressed elastic elements, such as silicone sealing rings, or foam.
[0085] In some embodiments, the side portion 42 and the battery module 2 are in contact connection to achieve a sealed connection.
[0086] In some embodiments, the side portion 42 and the top wall 13 are provided with seals (not shown), and the side portion 42 and the top wall 13 are sealed together by the seals. The seals include, but are not limited to, adhesives, sealing rings, compressed elastic elements, such as silicone sealing rings, or foam.
[0087] In some embodiments, the side portion 42 and the top wall 13 are in contact to achieve a sealed connection.
[0088] In some embodiments, the side portion 42 and the bottom wall 14 are provided with seals (not shown), and the side portion 42 and the bottom wall 14 are sealed together by the seals. The seals include, but are not limited to, adhesives, sealing rings, compressed elastic elements, such as silicone sealing rings, or foam.
[0089] In some embodiments, the side portion 42 and the bottom wall 14 are in contact to achieve a sealed connection.
[0090] In some embodiments, the flow guide 4 includes an extension 43 connected to the side portion 42. The energy storage device includes a seal 46 connecting the extension 43 to the battery module 2, connecting the extension 43 to the top wall 13, and connecting the extension 43 to the bottom wall 14. The seal 46 includes, but is not limited to, adhesive, sealing rings, and compressed elastic elements, such as silicone sealing rings or foam.
[0091] In some embodiments, the seal 46 is bonded and fixed to the extension 43, the seal 46 is bonded and fixed to the battery module 2, the seal 46 is bonded and fixed to the top wall 13, and the seal 46 is bonded and fixed to the bottom wall 14, so as to improve the sealing effect between the guide 4 and the battery module 2 and between the guide 4 and the outer casing 1.
[0092] In some embodiments, the seal 46 is in contact with the extension 43, the seal 46 is in contact with the battery module 2, the seal 46 is in contact with the top wall 13, the seal 46 is in contact with the bottom wall 14, and the seal 46 is in a compressed state.
[0093] As shown in Figures 4 and 6, in some embodiments, the extension 43 includes a first extension 431, a second extension 432, a third extension 433, and a fourth extension 434. The first extension 431 is connected to the first wall 421, the second extension 432 is connected to the second wall 422, the third extension 433 is connected to the third wall 423, and the fourth extension 434 is connected to the fourth wall 424.
[0094] In some embodiments, the first extension 431, the second extension 432, the third extension 433 and the fourth extension 434 are connected in sequence to form an annular sheet structure.
[0095] In some embodiments, the first extension 431, the second extension 432, the third extension 433 and the fourth extension 434 are arranged independently and spaced apart from each other.
[0096] In some embodiments, the base 41 is generally perpendicular to the second direction Y, and the side portion 42 is connected to the periphery of the side portion 42. The side portion 42 and the extension 43 can be a polygonal annular structure or a circular annular structure. The extension 43 is connected to the side portion 42 near the battery module 2.
[0097] In some embodiments, the extension 43 is integrally formed with the side portion 42, and the extension 43 is formed by folding the side portion 42 away from the base portion 41.
[0098] In some embodiments, referring to Figures 4 and 6, when viewed along the second direction Y, the extension 43 is located inside the recess 44. In other embodiments, when viewed along the second direction Y, the extension 43 is located outside the recess 44.
[0099] Please refer to Figure 3. The first extension 431 is sealed to the uppermost battery module 2a. The third extension 433 is sealed to the lowermost battery module 2b. The second extension 432 is sealed to each battery module 2. The fourth extension 434 is sealed to each battery module 2.
[0100] Please refer to Figure 5. The first extension 431 is sealed to the top wall 13, the third extension 433 is sealed to the bottom wall 14, the second extension 432 is sealed to each battery module 2, and the fourth extension 434 is sealed to each battery module 2.
[0101] In some embodiments, a gap of less than 5 mm is provided between the side portion 42 and the battery module 2 along the second direction Y to reduce the outflow of refrigerant from the gap.
[0102] In some embodiments, a gap of less than 5 mm is provided between the side portion 42 and the top wall 13 along the second direction Y to reduce the outflow of refrigerant from the gap.
[0103] In some embodiments, a gap of less than 5 mm is provided between the side portion 42 and the bottom wall 14 along the second direction Y to reduce the outflow of refrigerant from the gap.
[0104] As shown in Figure 8, in some embodiments, the battery module 2 has a pressure relief section 23, which faces the rear wall 12 and is disposed opposite to the air outlet 121. The pressure relief section 23 is mainly used to protect the battery module 2 under abnormal conditions. When dangerous situations such as overpressure, overheating, or overcharging occur in the battery module 2, the pressure relief section 23 will open and release the gas and heat inside the battery module 2, thereby reducing safety problems caused by excessive internal pressure of the battery module 2. By aligning the pressure relief section 23 with the rear wall 12 and distributing it opposite to the air outlet 121, when the pressure relief section 23 automatically opens to relieve pressure, the released gas and heat can be directly discharged to the outside of the outer casing 1 through the air outlet 121, improving the safety of the energy storage device.
[0105] As shown in Figures 8 and 9, in some embodiments, the battery module 2 has a first protrusion 24 and a second protrusion 25 spaced apart along a third direction Z, and the first protrusion 24 and the second protrusion 25 are located within a first heat dissipation channel 31. The projections of the first protrusion 24 and the second protrusion 25 along the second direction Y are located on both sides of the projection of the guide member 4 along the second direction Y, reducing the outflow of refrigerant in the third direction Z, wherein the third direction Z includes the third direction Z and the direction opposite to the third direction Z.
[0106] As shown in Figure 9, in some embodiments, among adjacent battery modules 2, the first protrusion 24 and the second protrusion 25 of one battery module 2 are connected to the other battery module 2. For example, the first protrusion 24 and the second protrusion 25 of one battery module 2 are bonded to the other battery module 2, thereby fixing the relative position between the two adjacent battery modules 2 and sealing both sides of the first heat dissipation channel 31 along the third direction Z, further reducing the loss of refrigerant when it flows along the first heat dissipation channel 31, and further improving the cooling effect on the battery module 2.
[0107] In some embodiments, the length of the first heat dissipation channel 31 along the first direction X is 5 mm to 20 mm, so that the refrigerant can flow between the battery modules 2 along the first heat dissipation channel 31 and exchange heat with the battery modules 2. The length of the first heat dissipation channel 31 can be adjusted according to the length of the battery modules 2.
[0108] As shown in Figure 10, in some embodiments, the battery module 2 includes a housing 22 and a plurality of battery cells 21. The battery cells 21 are disposed inside the housing 22 and are arranged at intervals along the third direction Z. In this way, when the refrigerant flows through the first heat dissipation channel 31, each battery cell 21 can be cooled down at the same time, reducing the temperature difference between different positions of the same battery cell 21 and improving the safety of the battery module 2.
[0109] In some embodiments, the energy storage device further includes an electrical module 6, which is disposed outside the housing 1 and electrically connected to the battery module 2. Disposing of the electrical module 6 outside the housing 1 facilitates heat dissipation, reduces the impact of heat generated by the electrical module 6 on the battery module 2, and minimizes the impact of the refrigerant on the electrical module 6.
[0110] In some implementations, the electrical module 6 includes a plurality of electrical components, and the electrical module 6 controls the charging and discharging of the plurality of battery modules 2.
[0111] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. An energy storage device, comprising: The outer casing is equipped with an air inlet and an air outlet; Multiple battery modules are disposed within the housing and arranged along a first direction; A first heat dissipation channel is located between adjacent battery modules, and the first heat dissipation channel connects the air inlet and the air outlet. A flow guide is disposed within the housing. The flow guide includes a base and a side portion connected to the base. The side portion is located on the side of the base facing the battery module. The base has an opening along a second direction. The base and the battery module are spaced apart. The first direction is perpendicular to the second direction. A fan is configured to direct refrigerant through the air inlet, the opening, the first heat dissipation channel, and the air outlet.
2. The energy storage device according to claim 1, characterized in that, The side portion is disposed around the base portion, and the base portion and the side portion form a recess, the recess facing the first heat dissipation channel.
3. The energy storage device according to claim 2, characterized in that, The side portion and the battery module are sealed together.
4. The energy storage device according to claim 3, characterized in that, The flow guide includes an extension that is connected to the side portion; A sealing element is provided between the extension and the battery module, and the sealing element connects the extension and the battery module.
5. The energy storage device according to claim 2, characterized in that, Along the second direction, there is a gap between the side portion and the battery module, the gap being less than 5 mm.
6. The energy storage device according to claim 2, characterized in that, The outer casing includes a bottom wall and a top wall disposed opposite to each other along the first direction, a second heat dissipation channel is provided between the battery module and the top wall, and / or a third heat dissipation channel is provided between the battery module and the bottom wall.
7. The energy storage device according to claim 6, characterized in that, The side portion is sealed to the top wall, the battery module, and the bottom wall.
8. The energy storage device according to claim 7, characterized in that, The flow guide includes an extension that is connected to the side portion; The energy storage device includes a seal that connects the extension to the battery module, the extension to the top wall, and the extension to the bottom wall.
9. The energy storage device according to claim 6, characterized in that, Along the second direction, there is a gap between the side portion and the battery module, the gap being less than 5 mm; And / or, along the second direction, there is a gap between the side portion and the top wall, the gap being less than 5 mm; And / or, along the second direction, there is a gap between the side portion and the bottom wall, the gap being less than 5 mm.
10. The energy storage device according to any one of claims 2 to 9, characterized in that, The side portion includes a first wall, a second wall, a third wall, and a fourth wall that are in contact with each other. The first wall and the third wall are opposite to each other along the first direction, and the second wall and the fourth wall are opposite to each other along the third direction. The first direction, the second direction, and the third direction are perpendicular to each other.
11. The energy storage device according to any one of claims 2 to 10, characterized in that, The flow guide includes an isolation section connected to the base and located within the recess, the isolation section dividing the recess into at least two chambers; The fan is provided in multiple ways, each fan is connected to one of the chambers, and each of the first heat dissipation channels faces one of the chambers.
12. The energy storage device according to claim 11, characterized in that, The isolation section includes a first isolation section and a second isolation section, which divide the recess into a first sub-chamber, a second sub-chamber and a third sub-chamber. The opening includes a first opening, a second opening, and a third opening. The first opening communicates with the first sub-chamber, the second opening communicates with the second sub-chamber, and the third opening communicates with the third sub-chamber. The fan includes a first fan, a second fan, and a third fan. The first fan is configured to allow refrigerant to pass through the air inlet, the first opening, the first sub-chamber, the first heat dissipation channel, and the air outlet. The second fan is configured to allow refrigerant to pass through the air inlet, the second opening, the second sub-chamber, the first heat dissipation channel, and the air outlet. The third fan is configured to allow refrigerant to pass through the air inlet, the third opening, the third sub-chamber, the first heat dissipation channel, and the air outlet.
13. The energy storage device according to claim 12, characterized in that, The second fan has a higher operating output power than the first fan, and the second fan has a higher operating output power than the third fan.
14. The energy storage device according to any one of claims 1 to 13, characterized in that, The housing includes a front wall and a rear wall disposed opposite to each other along the second direction; The front wall is disposed opposite to the air guide, and the air inlet is disposed on the front wall; the air inlet is disposed opposite to the fan, and the fan is fixed to the air guide; The air outlet is located on the rear wall.
15. The energy storage device according to claim 14, characterized in that, The battery module has a pressure relief section, which faces the rear wall and is positioned opposite the air outlet.
16. The energy storage device according to any one of claims 1 to 15, characterized in that, The battery module has a first protrusion and a second protrusion spaced apart along a third direction, and the first protrusion and the second protrusion are located within the first heat dissipation channel; The projections of the first protrusion along the second direction and the second protrusion along the second direction are located on both sides of the projection of the guide member along the second direction.
17. The energy storage device according to claim 16, characterized in that, In the adjacent battery modules, the first protrusion and the second protrusion of one battery module are connected to the other battery module.
18. The energy storage device according to any one of claims 1 to 18, characterized in that, Along the first direction, the length of the first heat dissipation channel is 5mm to 20mm.
19. The energy storage device according to any one of claims 1 to 19, characterized in that, The battery module includes: case: Multiple battery cells are disposed inside the housing, and the battery cells are spaced apart along a third direction.
20. The energy storage device according to any one of claims 1 to 20, characterized in that, The energy storage device includes an electrical module located outside the housing and electrically connected to the battery module.