Flow guide assembly, box structure and battery

Abstract

The utility model relates to a flow guide assembly, a box structure and a battery. The flow guide assembly comprises a flow guide main body, the flow guide main body is internally provided with a cavity, an air inlet and an air outlet are formed in the flow guide main body, the air inlet is used for being communicated with a containing space on a box structure of the battery, and the air outlet is used for being communicated with a pressure relief valve port on the box structure of the battery; and the at least two baffles are arranged in the cavity at intervals, a roundabout smoke guide channel is defined by the baffles and the inner wall of the flow guide body, and the smoke guide channel is communicated between the air inlet and the air outlet. According to the diversion assembly, the box structure and the battery provided by the invention, open fire at the pressure release valve port can be reduced, and the safety of the battery is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a flow guide component, a box structure and a battery. Background Art

[0002] Batteries have become widely popular and used in various fields due to their superior fast charging, long life, long battery life, high cost performance, and safety.

[0003] During the process of thermal runaway and exhaust and pressure relief of the battery, the high-temperature smoke is discharged to the outside through the pressure relief valve port on the battery box structure to prevent the internal part of the battery from exploding due to smoke accumulation. However, in traditional batteries, at the pressure relief valve port of the box structure, the high-temperature smoke is easily exposed to sufficient oxygen and can cause open flames, posing a major safety hazard. Utility Model Content

[0004] Based on this, it is necessary to provide a guide component, a box structure and a battery that can reduce the open flame at the pressure relief valve port and improve the safety of the battery in order to address the above problems.

[0005] A flow guide component, the flow guide component comprising:

[0006] A flow guide body having a cavity therein and an air inlet and an air outlet thereon, wherein the air inlet is used to communicate with the accommodation space on the box structure of the battery, and the air outlet is used to communicate with the pressure relief valve port on the box structure of the battery;

[0007] At least two baffles are arranged in the cavity at intervals, and define a circuitous smoke guiding channel with the inner wall of the flow guiding body, and the smoke guiding channel is connected between the air inlet and the air outlet.

[0008] In some embodiments, all of the baffles are arranged along the length direction of the guide body, and among every two adjacent baffles, one baffle is spaced apart from two inner walls of the guide body arranged along the width direction thereof, and the other baffle includes two sub-baffles, and the two sub-baffles are spaced apart along the width direction of the guide body, and the two end surfaces of the two sub-baffles away from each other are respectively in contact with the two inner walls of the guide body arranged along the width direction thereof.

[0009] In some embodiments, the smoke guiding channel has an air outlet area and air inlet areas distributed on opposite sides of the air outlet area along the length direction of the guide body; the air inlet corresponds to and is connected to the air inlet area one by one, and the air outlet is connected to the air outlet area;

[0010] The two surfaces of the first baffle and the last baffle facing each other are bounded together with the inner wall of the guide body to form the air inlet area, and the two surfaces of the two sub-baffles of a baffle located between the first baffle and the last baffle are bounded together with the inner wall of the guide body to form the air outlet area.

[0011] In some embodiments, the first baffle and the last baffle are spaced apart from two inner walls of the guide body arranged along the width direction thereof, and each end surface of the first baffle and the last baffle arranged along the width direction of the guide body defines a turning area with the inner wall of the guide body, and the air inlet area and the turning area defined by the same baffle and the inner wall of the guide body are connected;

[0012] The air inlets each include a main air inlet section and auxiliary air inlet sections arranged at both ends of the main air inlet section, the main air inlet section of the air inlet is connected to the corresponding air inlet area, and the auxiliary air inlet section of the air inlet corresponds to and is connected to the turning area connected to the corresponding air inlet area.

[0013] In some of the embodiments, the middlemost baffle among all the baffles includes two sub-baffles, and two oppositely disposed surfaces of the two sub-baffles of the middlemost baffle define the air outlet area with the inner wall of the guide body.

[0014] In some of the embodiments, at least one of the baffles has a storage cavity therein, and the storage cavity is used to store the phase change medium.

[0015] In some of the embodiments, the storage chamber is used to store a fire suppression medium;

[0016] A first pressure relief hole is provided on at least one of the baffles, the first pressure relief hole and the storage cavity on the same baffle correspond to each other and are connected, and the first pressure relief hole is used to release the phase change medium and the fire suppression medium into the smoke guide channel when the phase change material evaporates; and / or

[0017] A plurality of second pressure relief holes are provided on the guide body, all of which correspond to and are connected with all of the storage cavities of all of the baffles, and the second pressure relief holes are used to release the phase change medium and the fire suppression medium into the accommodation space when the phase change material evaporates.

[0018] In some of the embodiments, the flow guide assembly further includes a filter element, the filter element covers the air inlet, and the filter element is used to filter particulate matter in the smoke.

[0019] A box structure is applied to a battery, and the box structure comprises:

[0020] The box body comprises a plurality of profiles, all of which enclose a containing space of the box body, one of the profiles has a cavity inside, and the profiles are provided with pressure relief valve ports which are all connected with the cavity, and the pressure relief valve ports are arranged toward the outside of the box body;

[0021] As described in any one of the above items, the guide component is arranged in the mold cavity, and the air inlet of the guide component is connected to the accommodating space, and the air outlet of the guide component is connected to the pressure relief valve port.

[0022] A battery, characterized in that the battery comprises:

[0023] Battery cells; and

[0024] In the box structure described in the above embodiment, the battery cell is accommodated in the accommodation space.

[0025] The above-mentioned flow guide component, box structure and battery are provided with a flow guide component, and a circuitous smoke guide channel is provided in the flow guide component. Before the smoke is discharged to the pressure relief valve port, the smoke first flows through the circuitous smoke guide channel, so that the flow path and flow time of the smoke are prolonged, so the smoke can fully dissipate heat before being discharged to the pressure relief valve port. When the smoke is discharged to the pressure relief valve port, the temperature of the smoke is reduced, and it is difficult to produce an open flame even if it contacts with the oxygen at the pressure relief valve port, and the safety is relatively high. In addition, during the flow of the smoke in the circuitous smoke guide channel, the smoke collides with the wall surface forming the smoke guide channel, so that the particulate matter in the smoke sinks and remains in the smoke guide channel to form a filtration of the particulate matter, thereby reducing the risk of high-temperature particulate matter rushing to the pressure relief valve port and contacting with oxygen to ignite the smoke, and the possibility of an open flame at the pressure relief valve port is further reduced, and safety is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 An exploded diagram of a battery in one embodiment of the present application;

[0027] Figure 2 for Figure 1 An exploded view of a flow guide assembly in a battery is shown;

[0028] Figure 3 for Figure 2 The schematic diagram of the structure of the guide assembly after removing the cover is shown.

[0029] Figure Number:

[0030] 1.Battery;

[0031] 10. flow guide assembly; 30. profile;

[0032] 11. flow guide body; 13. baffle; 15. filter element;

[0033] 111, air inlet; 111a, first air inlet; 111b, second air inlet; 111c, main air inlet section; 111d, auxiliary air inlet section; 112, air outlet; 113, smoke guide channel; 113a, first air inlet area; 113b, second air inlet area; 113c, first turning area; 113d, second turning area; 113e, third turning area; 113f, fourth turning area; 113g, air outlet area; 114, second pressure relief hole; 115, main body; 116, cover; 117, first inner wall; 118, second inner wall; 119, third inner wall; 121, fourth inner wall;

[0034] 131, first baffle; 132, second baffle; 132a, first sub-baffle; 132b, second sub-baffle; 133, storage chamber; 134, first pressure relief hole;

[0035] 31. Cavity; 32. Pressure relief valve port;

[0036] X, the length direction of the guide body; Y, the width direction of the guide body. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0043] Please also read Figure 1 and Figure 2 At present, from the perspective of market development, the application of battery 1 is becoming more and more extensive. Battery 1 is not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of battery 1, its market demand is also constantly expanding.

[0044] The battery 1 includes a box structure and a battery cell. A storage space is formed in the box structure, and the battery cell is stored in the storage space of the box structure. The box structure is used to isolate the internal environment of the battery 1 from the external environment, and the battery cell is used to store and provide electrical energy.

[0045] Specifically, a pressure relief valve port 32 is provided on the box structure. When thermal runaway occurs, the battery cell releases a large amount of high-temperature smoke, which is discharged through the pressure relief valve port 32 to achieve pressure relief. In the conventional battery 1, the pressure relief valve port 32 of the box structure is prone to open flames during the pressure relief process, which poses a great safety hazard.

[0046] In order to alleviate the above-mentioned problems, the applicant has designed a guide component 10 and a box structure including the guide component 10 after in-depth research. The guide component 10 includes a guide body 11 and at least two baffles 13. The guide body 11 has a cavity therein, and an air inlet 111 and an air outlet 112 are provided on the guide body 11. The air inlet 111 is used to communicate with the accommodating space of the box structure, and the air outlet 112 is used to communicate with the pressure relief valve port 32 of the box structure. At least two baffles 13 are arranged at intervals in the cavity, and define a circuitous smoke guide channel 113 with the inner wall of the guide body 11, and the smoke guide channel 113 is connected between the air inlet 111 and the air outlet 112.

[0047] The flow guide body 11 includes a main body 115 and a cover 116. The main body 115 is a hollow structure with one end open and the other end closed. The cover 116 can be detachably covered at the opening of the main body 115 and enclosed with the main body 115 to form a cavity. During actual assembly, the baffle 13 is first arranged in the main body 115, and then the cover 116 is assembled and connected with the main body 115 to complete the assembly of the flow guide assembly 10.

[0048] The shape of the smoke guiding channel 113 formed by all the baffles 13 and the inner wall of the flow guiding body 11 may be an "S" shape, a "Z" shape, etc., which is not specifically limited here.

[0049] In the conventional box structure, the smoke in the accommodation space is directly discharged through the pressure relief valve port 32. Since the high-temperature smoke is not cooled sufficiently during the discharge process, it is easy to catch fire when it encounters sufficient oxygen at the pressure relief valve port 32. In addition, the high-temperature smoke also carries particulate matter, which is also easy to ignite the smoke when it comes into contact with oxygen when discharged to the valve port.

[0050] In the present application, a flow guide assembly 10 is provided in the box structure, and a circuitous smoke guide channel 113 is provided in the flow guide assembly 10. Before the smoke is discharged to the pressure relief valve port 32, the smoke first flows through the circuitous smoke guide channel 113, so that the flow path and flow time of the smoke are extended, so that the smoke can fully dissipate heat before being discharged to the pressure relief valve port 32. When the smoke is discharged to the pressure relief valve port 32, the temperature of the smoke is reduced, and it is difficult to produce an open flame even if it contacts the oxygen of the pressure relief valve port 32, and the safety is relatively high. In addition, during the flow of the smoke in the circuitous smoke guide channel 113, the smoke collides with the wall surface forming the smoke guide channel 113, so that the particulate matter in the smoke sinks and remains in the smoke guide channel 113 to form a filtration of the particulate matter, thereby reducing the risk of high-temperature particulate matter rushing to the pressure relief valve port 32 and contacting with oxygen to ignite the smoke, and the possibility of an open flame at the pressure relief valve port 32 is further reduced, and the safety is improved.

[0051] Please refer again Figure 1 and Figure 2 , and also see Figure 3 In some optional embodiments, all baffles 13 are arranged in a staggered manner along the length direction X of the flow guide body 11, and each two adjacent baffles 13 are respectively attached to the two inner walls of the flow guide body 11 arranged along the width direction Y thereof. This method of forming the smoke guide channel 113 is simple and easy to operate, and is convenient for forming the smoke guide channel 113.

[0052] Specifically, all baffles 13 are defined as two types, one of which is the first baffle 131, and the other is the second baffle 132. The guide body 11 has a first inner wall 117 and a second inner wall 118 that are opposite to each other and spaced apart in the flue gas width direction Y. In this embodiment, the first baffle 131 refers to a baffle 13 whose surface facing the first inner wall 117 is in contact with the first inner wall 117, and whose surface away from the first inner wall 117 is spaced apart from the second inner wall 118. The second baffle 132 refers to a baffle 13 whose surface facing the first inner wall 117 is spaced apart from the first inner wall 117, and whose surface away from the first inner wall 117 is in contact with the second inner wall 118.

[0053] During actual operation, the smoke in the smoke guiding channel 113 alternately flows through the gap between the first baffle 131 and the second inner wall 118 , the gap between the first baffle 131 and the second baffle 132 , and the gap between the second baffle 132 and the first inner wall 117 .

[0054] In some optional embodiments, all baffles 13 are arranged along the length direction X of the guide body 11. Among every two adjacent baffles 13, one baffle 13 is spaced apart from two inner walls of the guide body 11 along its width direction Y, and the other baffle 13 includes two sub-baffles 13. The two sub-baffles 13 are spaced apart along the width direction Y of the guide body 11, and the two end surfaces of the two sub-baffles 13 far away from each other are respectively fitted with the two inner walls of the guide body 11 along its width direction Y.

[0055] Specifically, all baffles 13 are defined as two types, one of which is the first baffle 131, and the other is the second baffle 132. In this embodiment, the first baffle 131 refers to a baffle 13 that is spaced apart from the first inner wall 117 and the second inner wall 118, and the second baffle 132 refers to a baffle 13 including two sub-baffles 13. In the second baffle 132, the two sub-baffles 13 are defined as a first sub-baffle 132a and a second sub-baffle 132b, respectively. The first sub-baffle 132a and the second sub-baffle 132b are arranged along the width direction Y of the guide body 11, and the first sub-baffle 132a is closer to the first inner wall 117 than the second sub-baffle 132b, the end face of the first sub-baffle 132a away from the second sub-baffle 132b is in contact with the first inner wall 117, and the end face of the second sub-baffle 132b away from the first sub-baffle 132a is in contact with the second inner wall 118.

[0056] In this embodiment, multiple smoke flow paths are formed in the smoke guiding channel 113, such as, the smoke alternately flows through the gap between the first baffle 131 and the first inner wall 117, the gap between the first baffle 131 and the second baffle 132, and the gap between the first sub-baffle 132a and the second sub-baffle 132b, or, the smoke alternately flows through the gap between the first baffle 131 and the second inner wall 118, the gap between the first baffle 131 and the second baffle 132, and the gap between the first sub-baffle 132a and the second sub-baffle 132b.

[0057] It can be seen that in this embodiment, the smoke entering the smoke guiding channel 113 can flow to the pressure relief valve port 32 through multiple smoke flow paths, and the flow mode of the smoke in the smoke guiding channel 113 is flexible and diverse, ensuring that the smoke can flow smoothly to the pressure relief valve port 32.

[0058] Further, in some optional embodiments, the smoke guide channel 113 has an air outlet area 113g and air inlet areas distributed on opposite sides of the air outlet area 113g along the length direction X of the guide body 11; the air inlet 111 corresponds to and is connected to the air inlet area, and the air outlet 112 is connected to the air outlet area 113g. The two surfaces of the first baffle 13 and the last baffle 13 that are away from each other are bounded with the inner wall of the guide body 11 to form an air inlet area, and the two surfaces of the two sub-baffles 13 of a baffle 13 located between the first baffle 13 and the last baffle 13 that are disposed opposite to each other are bounded with the inner wall of the guide body 11 to form an air outlet area 113g.

[0059] The two air inlet areas are defined as the first air inlet area 113a and the second air inlet area 113b, and the two air inlets 111 are defined as the first air inlet 111a and the second air inlet 111b. The first air inlet area 113a is connected to the first air inlet 111a, and the second air inlet area 113b is connected to the second air inlet 111b. The surface of the first baffle 13 away from the last baffle 13 and the inner wall of the guide body 11 define the first air inlet area 113a, and the surface of the last baffle 13 away from the first baffle 13 and the inner wall of the guide body 11 define the second air inlet area 113b. The first baffle 13 and the last baffle 13 are either the first baffle 131 or the second baffle 132, and the first baffle 13 and the last baffle 13 can be the same or different. For the convenience of description, the following embodiments are described by taking the first baffle 13 and the last baffle 13 as the same and the first baffle 131 as an example.

[0060] In actual operation, smoke enters from the first air inlet area 113a and the second air inlet area 113b located at both ends of the flow guide body 11, flows to the air outlet area 113g in opposite directions, and finally flows out from the pressure relief valve port 32. In this case, the first air inlet area 113a and the second air inlet area 113b can be inlet at the same time, increasing the air intake amount and air intake path of the smoke guide channel 113, so that smoke can quickly enter the smoke guide channel 113 through different flow paths, which is conducive to pressure relief.

[0061] Of course, in some other embodiments, the method of forming the air inlet area and the air outlet area 113g is not limited to the above-mentioned one. For example, the two surfaces of the first baffle 13 and the second baffle 13 that are opposite to each other and the inner wall of the guide body 11 define the first air inlet area 113a, and the two surfaces of the second to last baffle 13 and the last baffle 13 that are opposite to each other and the inner wall of the guide body 11 define the second air inlet area 113b.

[0062] For example, in some other embodiments, the air inlet area and the air outlet area 113g are both one, the two surfaces of the first baffle 13 and the second baffle 13 that are opposite to each other and the inner wall of the guide body 11 define the air inlet area, and the surface of the last baffle 13 that is away from the first baffle 13 and the inner wall of the guide body 11 define the air inlet area.

[0063] For example, in some other embodiments, the surface of the first baffle 13 facing away from the second baffle 13 and the inner wall of the guide body 11 define an air inlet area, and the two surfaces of the second to last baffle 13 and the last baffle 13 that are opposite to each other and the inner wall of the guide body 11 define an air outlet area 113g.

[0064] Further, in some optional embodiments, the first baffle 13 and the last baffle 13 are arranged with intervals between the two inner walls of the guide body 11 arranged along the width direction Y thereof, and each end surface of the first baffle 13 and the last baffle 13 arranged along the width direction Y of the guide body 11 defines a turning area with the inner wall of the guide body 11, and the air intake area and the turning area defined by the same baffle 13 and the inner wall of the guide body 11 are connected. The air inlet 111 includes a main air intake section 111c and auxiliary air intake sections 111d arranged at both ends of the main air intake section 111c, the main air intake section 111c of the air inlet 111 is connected to the corresponding air intake area, and the auxiliary air intake section 111d of the air inlet 111 corresponds to and is connected to the turning area connected to the corresponding air intake area.

[0065] The first baffle 13 and the last baffle 13 are both spaced apart from two inner walls of the guide body 11 arranged along the width direction Y thereof. That is, the first baffle 13 and the last baffle 13 are both first baffles 131 .

[0066] Each end surface of the first baffle 13 and the last baffle 13 arranged along the width direction Y of the guide body 11 defines a turning area with the inner wall of the guide body 11. Specifically, the end surface of the first baffle 13 facing the first inner wall 117 defines a first turning area 113c with the first inner wall 117 of the guide body 11, the end surface of the first baffle 13 facing the second inner wall 118 defines a second turning area 113d with the second inner wall 118 of the guide body, the end surface of the last baffle 13 facing the first inner wall 117 defines a third turning area 113e with the first inner wall 117 of the guide body 11, and the end surface of the last baffle 13 facing the second inner wall 118 defines a fourth turning area 113f with the second inner wall 118 of the guide body.

[0067] The air intake area and the turning area defined by the same baffle 13 and the inner wall of the guide body 11 are connected. It can be understood that the first air intake area 113a is connected to the first turning area 113c and the second turning area 113d, and the second air intake area 113b is connected to the third turning area 113e and the fourth turning area 113f.

[0068] The air inlet 111 includes a main air inlet section 111c and auxiliary air inlet sections 111d arranged at both ends of the main air inlet section 111c. The main air inlet section 111c of the air inlet 111 is connected to the corresponding air inlet area, and the auxiliary air inlet section 111d of the air inlet 111 corresponds to and is connected to the turning area connected to the corresponding air inlet area. It can be understood that the main air inlet section 111c of the first air inlet 111a is connected to the first air inlet area 113a, and the auxiliary air inlet section 111d of the first air inlet 111a is connected to the turning area 113a. The auxiliary air intake section 111d is connected to the first turning zone 113c, another auxiliary air intake section 111d of the first air inlet 111a is connected to the second turning zone 113d, the main air intake section 111c of the second air inlet 111b is connected to the second air intake zone 113b, an auxiliary air intake section 111d of the second air inlet 111b is connected to the third turning zone 113e, and another auxiliary air intake section 111d of the second air inlet 111b is connected to the fourth turning zone 113f.

[0069] In this embodiment, the first air inlet 111a and the second air inlet 111b have a large cross-sectional area, and smoke can enter the first air inlet area 113a, the second air inlet area 113b, the first turning area 113c, the second turning area 113d, the third turning area 113e and the fourth turning area 113f from the first air inlet 111a and the second air inlet 111b at the same time. This design increases the air intake of the smoke guide channel 113, which is conducive to pressure relief.

[0070] In some optional embodiments, the middle baffle 13 among all the baffles 13 includes two sub-baffles 13, and the surfaces of the two sub-baffles 13 of the middle baffle 13 that are arranged opposite to each other define an air outlet area 113g with the inner wall of the guide body 11.

[0071] Specifically, taking the case where the number of baffles 13 in the smoke guiding channel 113 is an odd number as an example, there is only one middle baffle 13, which is the second baffle 132. Taking the case where the number of baffles 13 in the smoke guiding channel 113 is an even number as an example, there are two middle baffles 13, one of which is the first baffle 131, and the other is the second baffle 132.

[0072] When the two surfaces of the two sub-baffles 13 of the second baffle 132 in the middle are arranged opposite to each other and define the outlet area 113g with the inner wall of the smoke guide channel 113, the length of the path through which the smoke flows from the first air inlet area 113a to the outlet area 113g is substantially equal to the length of the path through which the smoke flows from the second air inlet area 113b to the outlet area 113g. In this way, the smoke flowing from the first air inlet area 113a and the second air inlet area 113b to the outlet area 113g can dissipate heat evenly, which is conducive to reducing the risk of open fire at the pressure relief valve port 32.

[0073] In some optional embodiments, at least one baffle 13 has a storage cavity 133, and the storage cavity 133 is used to store the phase change medium. For example, each baffle 13 has a storage cavity 133, and the storage cavity 133 on each baffle 13 stores the phase change medium. For example, the baffle 13 having the first sub-baffle 132a and the second sub-baffle 132b, the first sub-baffle 132a and the second sub-baffle 132b have storage cavities 133.

[0074] Specifically, the storage cavity 133 may be an open cavity or a sealed cavity.

[0075] The phase change medium can absorb a large amount of heat from the smoke flowing through the smoke guide channel 113 during the phase change process, which can effectively improve the cooling effect of the smoke and further reduce the risk of open flames.

[0076] In some optional embodiments, the storage chamber 133 is used to store a fire suppression medium (for example, perfluorohexanone); a first pressure relief hole 134 is provided on at least one baffle plate 13, the first pressure relief hole 134 and the storage chamber 133 on the same baffle plate 13 correspond to each other and are connected, and the first pressure relief hole 134 is used to release the phase change medium and the fire suppression medium into the smoke guide channel 113 when the phase change material evaporates; and / or, a plurality of second pressure relief holes 114 are provided on the flow guide body 11, all the second pressure relief holes 114 correspond to each other and are connected to all the storage chambers 133 of all baffle plates 13, and the second pressure relief holes 114 are used to release the phase change medium and the fire suppression medium into the accommodation space when the phase change material evaporates. For the convenience of explanation, the following is an example in which the first pressure relief hole 134 is provided on at least one baffle plate 13, and a plurality of second pressure relief holes 114 are provided on the flow guide body 11.

[0077] As an example, the first pressure relief hole 134 is provided on the first baffle plate 13 and the last baffle plate 13. The first pressure relief hole 134 on the first baffle plate 13 is connected to the smoke guide channel 113 and the storage chamber 133 on the first baffle plate 13, and the first pressure relief hole 134 on the last baffle plate 13 is connected to the smoke guide channel 113 and the storage chamber 133 on the last baffle plate 13. In this way, when the phase change material in the first baffle plate 13 and the last baffle plate 13 evaporates and releases the phase change medium and the fire suppression medium into the accommodation space, the smoke can be suppressed when the smoke just enters the first air inlet area 113a and the second air inlet area 113b of the smoke guide channel 113. As an example, taking the second baffle 132 including the first sub-baffle 132a and the second sub-baffle 132b, the first sub-baffle 132a and the second sub-baffle 132b are both provided with a storage cavity 133 and a first pressure relief hole 134, the storage cavity 133 on the first sub-baffle 132a is connected to the first pressure relief hole 134 on the first sub-baffle 132a, and the storage cavity 133 on the second sub-baffle 132b is connected to the first pressure relief hole 134 on the second sub-baffle 132b.

[0078] As an example, taking the example that each first baffle plate 131, each first sub-baffle plate 132a and each second sub-baffle plate 132b are provided with a storage cavity 133, the total number of the storage cavities 133 of all the first baffle plates 131, the storage cavities 133 of all the first sub-baffle plates 132a, and the storage cavities 133 of all the second sub-baffle plates 132b is the same as the total number of all the second pressure relief holes 114, and correspond one to one.

[0079] The storage chamber 133 stores a phase change medium and a fire suppression medium at the same time. The phase change medium absorbs heat and evaporates to rush out of the storage chamber 133, and enters the smoke guide channel 113 through the first pressure relief hole 134, and enters the accommodation space through the second pressure relief hole 114. During this process, the fire suppression medium follows the phase change medium to enter the smoke guide channel 113 and the accommodation space at the same time, and suppresses the smoke in the smoke guide channel 113 and the accommodation space, thereby further reducing the risk of open flames.

[0080] It is worth mentioning that the phase change medium and the fire suppression medium can be two separately formed mediums, or the phase change medium and the fire suppression medium can also be formed into one medium in a composite manner.

[0081] In order to reduce the leakage of phase change medium and fire suppression medium, sealing components such as rivets and hot pressing films can be used to seal each first pressure relief hole 134 and each second pressure relief hole 114. When thermal runaway exhaust occurs, the phase change material absorbs the heat of the flue gas, evaporates through phase change, and opens the sealing components at the first pressure relief hole 134 and the second pressure relief hole to release the pressure.

[0082] In some optional embodiments, the flow guide assembly 10 further includes a filter 15, which covers the air inlet 111 and is used to filter particulate matter in the smoke. For example, the filter 15 is a filter net.

[0083] It can be understood that primary filtration is performed when the flue gas flows through the filter element 15, and secondary filtration is performed when the flue gas flows through the smoke guide channel 113. In this way, the flue gas has a better filtering effect, further reducing the risk of particulate matter causing open flames when it is discharged with the flue gas to the pressure relief valve port 32.

[0084] It is worth mentioning that in the present application, in order to reduce the thermal runaway of the battery 1 and the ejection of more particulate matter, which may cause the filter mesh of the filter element 15 to be blocked, a filter element 15 with a larger filter mesh diameter can be used. In this case, the filter element 15 is combined with the design of the smoke guide channel 113, which can also ensure that the smoke has a better filtering effect.

[0085] The present application also provides a box structure, which includes a box body and a flow guide assembly 10. The box body includes a plurality of profiles 30. All the profiles 30 enclose a storage space of the box body. A profile 30 has a cavity 31 inside, and the profile 30 is provided with a pressure relief valve port 32 which is connected to the cavity 31. The pressure relief valve port 32 is arranged toward the outside of the box body. The flow guide assembly 10 is arranged in the cavity 31, and the air inlet 111 of the flow guide assembly 10 is connected to the storage space, and the air outlet 112 of the flow guide assembly 10 is connected to the pressure relief valve port 32. In this way, when exhausting due to thermal runaway, the smoke in the storage space can enter the smoke guide channel 113 of the flow guide assembly 10 from the air inlet 111, and be discharged through the air outlet 112 and the pressure relief valve port 32 in sequence.

[0086] The box structure in the present application has the effects brought by any of the above-mentioned embodiments, so it will not be described in detail here.

[0087] In addition, it is worth mentioning that the guide assembly 10 is disposed in the cavity 31 , and the guide assembly 10 does not occupy the space of the box structure, which is beneficial to improving the space utilization rate of the box structure.

[0088] The present application also provides a battery 1, which includes a battery cell and the box structure described in the above embodiment. The battery cell is accommodated in the accommodating space of the box structure and is used to store and provide electrical energy.

[0089] The battery 1 in the present application has the effects brought by any of the above embodiments, so it will not be described in detail here.

[0090] The above-mentioned flow guide component 10, box structure and battery 1 are provided with a flow guide component 10, and a circuitous smoke guide channel 113 is provided in the flow guide component 10. Before the smoke is discharged to the pressure relief valve port 32, the smoke first flows through the circuitous smoke guide channel 113, so that the flow path and flow time of the smoke are extended, so the smoke can fully dissipate heat before being discharged to the pressure relief valve port 32. When the smoke is discharged to the pressure relief valve port 32, the temperature of the smoke is reduced, and it is difficult to produce an open flame even if it contacts with the oxygen of the pressure relief valve port 32, and the safety is relatively high. In addition, during the flow of the smoke in the circuitous smoke guide channel 113, the smoke collides with the wall surface forming the smoke guide channel 113, so that the particulate matter in the smoke sinks and remains in the smoke guide channel 113 to form a filtration of the particulate matter, thereby reducing the risk of high-temperature particulate matter rushing to the pressure relief valve port 32 and contacting with oxygen to ignite the smoke, and the possibility of an open flame at the pressure relief valve port 32 is further reduced, and the safety is improved.

[0091] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A flow guide component, characterized in that: The flow guide assembly comprises: A flow guide body (11) having a cavity therein and provided with an air inlet (111) and an air outlet (112), wherein the air inlet (111) is used to communicate with a receiving space on a battery box structure, and the air outlet (112) is used to communicate with a pressure relief valve port (32) on the battery box structure; At least two baffles (13) are arranged at intervals in the cavity and define a circuitous smoke guiding channel (113) with the inner wall of the flow guiding body (11); the smoke guiding channel (113) is connected between the air inlet (111) and the air outlet (112).

2. The flow guide assembly according to claim 1, characterized in that: All the baffles (13) are arranged along the length direction (X) of the flow guide body (11); of each two adjacent baffles (13), one baffle (13) is arranged at intervals from two inner walls of the flow guide body (11) arranged along the width direction (Y) thereof, and the other baffle (13) comprises two sub-baffles (13); the two sub-baffles (13) are arranged at intervals from each other along the width direction (Y) of the flow guide body (11), and two end surfaces of the two sub-baffles (13) that are far away from each other are respectively in contact with two inner walls of the flow guide body (11) arranged along the width direction (Y) thereof.

3. The flow guide assembly according to claim 2, characterized in that: The smoke guiding channel (113) comprises an air outlet area (113g) and air inlet areas distributed on two opposite sides of the air outlet area (113g) along the length direction (X) of the guide body (11); the air inlet (111) corresponds to and is connected to the air inlet area one by one, and the air outlet (112) is connected to the air outlet area (113g); The two surfaces of the first baffle (13) and the last baffle (13) facing away from each other are bounded together with the inner wall of the flow guide body (11) to form the air inlet area, and the two surfaces of the two sub-baffles (13) of a baffle (13) located between the first baffle (13) and the last baffle (13) are opposed to each other and bounded together with the inner wall of the flow guide body (11) to form the air outlet area (113g).

4. The flow guide assembly according to claim 3, characterized in that: The first baffle (13) and the last baffle (13) are both spaced apart from two inner walls of the flow guide body (11) arranged along the width direction (Y) thereof, and each end surface of the first baffle (13) and the last baffle (13) arranged along the width direction (Y) of the flow guide body (11) defines a turning area with the inner wall of the flow guide body (11), and the air inlet area and the turning area defined by the same baffle (13) and the inner wall of the flow guide body (11) are in communication; The air inlet (111) comprises a main air inlet section (111c) and auxiliary air inlet sections (111d) arranged at both ends of the main air inlet section (111c); the main air inlet section (111c) of the air inlet (111) is connected to the corresponding air inlet area; the auxiliary air inlet section (111d) of the air inlet (111) corresponds to and is connected to the turning area connected to the corresponding air inlet area.

5. The flow guide assembly according to claim 3, characterized in that: The middle baffle (13) among all the baffles (13) comprises two sub-baffles (13), and two surfaces of the two sub-baffles (13) of the middle baffle (13) arranged opposite to each other define the air outlet area (113g) with the inner wall of the flow guide body (11).

6. The flow guide assembly according to any one of claims 1 to 5, characterized in that: At least one of the baffles (13) has a storage cavity (133) therein, and the storage cavity (133) is used to store a phase change medium.

7. The flow guide assembly according to claim 6, characterized in that: The storage chamber (133) is used to store the fire suppression medium; At least one of the baffles (13) is provided with a first pressure relief hole (134), the first pressure relief hole (134) and the storage cavity (133) on the same baffle (13) correspond to each other and are connected, and the first pressure relief hole (134) is used to release the phase change medium and the fire suppression medium into the smoke guide channel (113) when the phase change material evaporates; and / or The flow guide body (11) is provided with a plurality of second pressure relief holes (114), all of the second pressure relief holes (114) correspond one-to-one to and are in communication with all of the storage chambers (133) of all of the baffles (13), and the second pressure relief holes (114) are used to release the phase change medium and the fire suppression medium into the accommodation space when the phase change material evaporates.

8. The flow guide assembly according to any one of claims 1 to 5, characterized in that: The flow guide component further comprises a filter element (15), the filter element (15) covers the air inlet (111), and the filter element (15) is used to filter particulate matter in the smoke.

9. A box structure, applied to a battery, characterized in that: The box structure comprises: A box body, comprising a plurality of profiles (30), all of the profiles (30) enclosing a storage space of the box body, one of the profiles (30) having a cavity (31) inside, and the profiles (30) being provided with a pressure relief valve port (32) in communication with the cavity (31), the pressure relief valve port (32) being arranged toward the outside of the box body; As described in any one of claims 1 to 8 above, the guide component is arranged in the cavity (31), and the air inlet (111) of the guide component is connected to the accommodating space, and the air outlet (112) of the guide component is connected to the pressure relief valve port (32).

10. A battery, characterized in that: The battery comprises: Battery cells; and According to the box structure of claim 9, the battery cell is accommodated in the accommodation space.

Images