Battery and electric vehicle

Abstract

The application provides a battery and an electric vehicle. The battery comprises: a shell having a containing cavity, the shell being provided with a pole and an explosion-proof valve; a battery cell assembly located in the containing cavity, the battery cell assembly comprising a battery cell body; a heat insulation piece provided in the containing cavity, and at least part of the heat insulation piece being located between the battery cell body and a top portion of the shell; wherein the heat insulation piece is provided with a guide hole and a relief hole, the position of the guide hole being matched with the position of the explosion-proof valve, and the pole passes through the relief hole to be electrically connected with the battery cell body. The application prevents the shell from being damaged and prevents the problem of non-directional jet flow when the battery cell is in thermal runaway.

Description

Technical Field

[0001] This application relates to a battery and an electric vehicle, belonging to the field of new energy battery technology. Background Technology

[0002] With the continuous improvement of the energy density of lithium-ion batteries (such as the breakthrough of 300Wh / kg in ternary material systems), the risk of thermal runaway is increasing exponentially. High-energy-density batteries have an accumulation of active materials and intense reactions at the electrode / electrolyte interface. Once thermal runaway occurs, a large amount of high-temperature, high-speed airflow will be generated inside the cell, which often leads to melting and cracking of the battery's aluminum casing.

[0003] In the process of conceiving and implementing this application, the applicant discovered at least the following problems: Currently, the main focus is on the directional pressure relief direction of the explosion-proof valve. When the cell experiences thermal runaway, the high-temperature gas generated may diffuse through unexpected paths such as the shell seams and the periphery of the electrode post, causing thermal runaway of adjacent cells and damaging the internal components of the battery, thereby exacerbating the risk of thermal propagation.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Utility Model Content

[0005] This application provides a battery and an electric vehicle that prevents the casing from being damaged and prevents the occurrence of non-directional jetting problems when the battery cell experiences thermal runaway.

[0006] This application provides a battery, comprising:

[0007] The outer casing has a receiving cavity, and the outer casing is equipped with an electrode post and an explosion-proof valve;

[0008] A battery cell assembly is located within a receiving cavity, and the battery cell assembly includes a battery cell body;

[0009] A heat insulation element is disposed within the receiving cavity, and at least a portion of the heat insulation element is located between the cell body and the top of the outer casing;

[0010] The heat insulation component has guide holes and clearance holes. The position of the guide holes matches the position of the explosion-proof valve. The pole passes through the clearance holes to be electrically connected to the battery cell body.

[0011] The beneficial effects of this application are: by setting up the heat insulation component, the impact of high temperature and high speed gas on the outer casing can be isolated when the battery cell is thermally runaway, preventing the outer casing from being damaged, and also preventing the problem of non-directional jetting.

[0012] In some alternative implementations, the projection of the guide hole is located inside the explosion-proof valve along the thickness direction of the battery.

[0013] It should be noted that the projection of the guide hole is precisely matched with the position of the explosion-proof valve, ensuring that in the event of battery thermal runaway, gas can directly enter the explosion-proof valve through the guide hole, reducing gas retention and disturbance inside the battery and improving the efficiency of gas release.

[0014] In some alternative implementations, the explosion-proof valve has an arc-shaped structure;

[0015] The guide hole is an elliptical hole, and its size is 1mm-2mm larger than that of the explosion-proof valve.

[0016] It should be noted that the guide hole size is slightly larger than that of the explosion-proof valve, which allows gas to enter the explosion-proof valve more quickly through the guide hole in the event of thermal runaway, reducing resistance during gas release, improving gas release efficiency, increasing exhaust area, and enhancing heat diffusion.

[0017] In some alternative embodiments, the housing includes a lower housing and an upper cover plate, with an opening in the lower housing and the upper cover plate covering the opening and forming a receiving cavity;

[0018] The pole is located on the upper cover plate.

[0019] It should be noted that by combining the lower housing with the upper cover plate to form a closed cavity, good structural stability is provided, ensuring that the battery cell assembly is well protected inside.

[0020] In some alternative embodiments, the heat insulation element includes a first heat insulation plate located between the top of the cell body and the upper cover plate;

[0021] Both the guide hole and the clearance hole are located on the first heat insulation plate.

[0022] It should be noted that the first heat insulation plate is located between the cell body and the top cover plate, which can effectively isolate the heat generated by the cell and prevent the heat from being directly transferred to the top cover plate, thereby protecting the top cover plate and its components (such as the poles) from high temperature.

[0023] In some alternative implementations, there are at least two terminals, arranged at least two intervals along the length of the battery, and an explosion-proof valve is located between the at least two terminals;

[0024] There are at least two clearance holes, which are spaced apart along the length of the battery, and the guide hole is located between the at least two clearance holes.

[0025] It should be noted that by arranging at least two terminals spaced apart along the length of the battery, a more stable and reliable electrical connection is provided, which can effectively reduce electrical interference and improve battery performance and efficiency.

[0026] In some alternative embodiments, the heat insulation component further includes a second heat insulation plate connected to the first heat insulation plate and located between the side of the cell body and the side wall of the lower housing.

[0027] The extension direction of the second insulation plate forms an angle with the extension direction of the first insulation plate.

[0028] It should be noted that by adding a second heat insulation plate, the sides of the battery cell are also effectively thermally insulated, which can more comprehensively prevent heat transfer to the casing and improve the overall thermal management capability of the battery. By adding heat insulation protection to the sides of the battery cell, the thermal shock to the casing in the event of thermal runaway of the battery cell is further reduced, reducing the risk of damage to the casing material and battery explosion.

[0029] In some alternative embodiments, there are at least two second heat insulation plates, located on opposite sides of the first heat insulation plate along the length of the battery.

[0030] It should be noted that by setting at least two second heat insulation plates on opposite sides of the first heat insulation plate, the sides of the cell body are more comprehensively thermally isolated, effectively preventing heat from being transferred to the casing through the sides and improving the overall thermal management capability of the battery.

[0031] In some alternative embodiments, at least one of the first and second heat insulation plates has a flange extending toward the cell body.

[0032] It should be noted that the flanged design increases the contact area between the first and second heat insulation plates and the cell body, thereby providing more effective thermal insulation, better preventing heat transfer to the casing, and improving the overall thermal management capability of the battery.

[0033] In addition, this application also provides an electric vehicle including the aforementioned battery.

[0034] The battery and electric vehicle provided in this application include the aforementioned battery in the electric vehicle. The battery includes: a casing having a receiving cavity, with terminals and an explosion-proof valve disposed on the casing; a cell assembly located within the receiving cavity, the cell assembly including a cell body; and a heat insulation member disposed within the receiving cavity, with at least a portion of the heat insulation member located between the cell body and the top of the casing; wherein the heat insulation member has a guide hole and a clearance hole, the position of the guide hole matching the position of the explosion-proof valve, and the terminals passing through the clearance hole for electrical connection with the cell body.

[0035] By incorporating thermal insulation components, the impact of high-temperature and high-speed gas on the casing can be isolated during thermal runaway of the battery cell, preventing damage to the casing and preventing non-directional jetting issues. Attached Figure Description

[0036] The above and other objects, features, and advantages of embodiments of this application will become more readily understood through the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application will be described by way of example and non-limitation, wherein:

[0037] Figure 1 This is a schematic diagram of the battery structure provided in an embodiment of this application;

[0038] Figure 2 This is a schematic diagram of the structure of the heat insulation component in the battery provided in the embodiments of this application;

[0039] Figure 3 This is a top view of the heat insulation component in the battery provided in an embodiment of this application.

[0040] Figure label:

[0041] 100-battery;

[0042] 110 - Outer casing;

[0043] 111-Pole Column;

[0044] 112 - Explosion-proof valve;

[0045] 113 - Lower housing;

[0046] 114 - Top cover plate;

[0047] 120 - Battery cell assembly;

[0048] 121 - Battery cell body;

[0049] 130 - Thermal insulation;

[0050] 131 - First insulation board;

[0051] 1311 - Guide hole;

[0052] 1312 - Clearance Hole;

[0053] 132 - Second insulation board;

[0054] 133 - Flip the edge. Detailed Implementation

[0055] 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 and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. All other obtained embodiments are within the scope of protection of this application. In the absence of conflict, the following embodiments and features can be combined with each other.

[0056] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0057] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0059] In the process of conceiving and implementing this application, the applicant discovered at least the following problems: Currently, the main focus is on the directional pressure relief direction of the explosion-proof valve. When the cell experiences thermal runaway, the high-temperature gas generated may diffuse through unexpected paths such as the shell seams and the periphery of the electrode post, causing thermal runaway of adjacent cells and damaging the internal components of the battery, thereby exacerbating the risk of thermal propagation.

[0060] The battery proposed in this application, through the setting of heat insulation components, can isolate the impact of high temperature and high speed gas on the outer casing during thermal runaway of the battery cell, prevent the outer casing from being damaged, and prevent the problem of non-directional jetting.

[0061] The battery provided in this application will be described in detail below with reference to specific embodiments.

[0062] Figure 1 This is a schematic diagram of the battery structure provided in an embodiment of this application. Figure 2 This is a schematic diagram of the structure of the heat insulation component in the battery provided in the embodiments of this application. Figure 3 This is a top view of the heat insulation component in the battery provided in an embodiment of this application.

[0063] like Figures 1 to 3 As shown in the embodiment of this application, a battery 100 is provided, comprising:

[0064] The outer casing 110 has a receiving cavity, and the outer casing 110 is provided with a pole post 111 and an explosion-proof valve 112;

[0065] The battery cell assembly 120 is located within the receiving cavity, and the battery cell assembly 120 includes a battery cell body 121;

[0066] A heat insulation element 130 is disposed within the receiving cavity, and at least a portion of the heat insulation element 130 is located between the cell body 121 and the top of the outer casing 110;

[0067] The heat insulation component 130 has a guide hole 1311 and a clearance hole 1312. The position of the guide hole 1311 matches the position of the explosion-proof valve 112. The pole post 111 passes through the clearance hole 1312 to be electrically connected to the battery cell body 121.

[0068] In some examples, the housing 110 can be a rectangular structure, and the size of the housing 110 can be greater than or equal to the size of the cell assembly 120, so that the housing 110 can support the cell assembly 120.

[0069] It is understandable that the function of the receiving cavity is to house the battery cell assembly 120. It is easy to understand that the receiving cavity is sealed to prevent side reactions from occurring in the internal system of the battery cell assembly 120, which would affect the performance of the battery cell assembly 120.

[0070] For example, the size or shape of the receiving cavity is matched with the size and shape of the battery cell assembly 120. Specifically, it can be adjusted according to the actual situation. This application embodiment does not impose too many limitations here.

[0071] In this embodiment, the battery cell assembly 120 can be configured as a rectangular structure. The battery cell assembly 120 can be located inside the housing 110.

[0072] Understandably, the housing 110 can be used to support the battery cell assembly 120.

[0073] The dimensions of the outer shell 110 can be set according to actual needs, and this embodiment of the application does not impose too many restrictions here.

[0074] In addition, it should be noted that the shape of the outer shell 110 is not limited in this embodiment. For example, the outer shell 110 can be a regular shape such as a cuboid or a cylinder. Of course, the outer shell 110 can also be other irregular shapes.

[0075] In some embodiments, the housing 110 protects the battery cell assembly 120 therein. The housing 110 may be composed of two parts joined together for easy installation. The housing 110 may be a metal housing. Specifically, the material of the housing 110 may be stainless steel, which is sturdy and corrosion-resistant. Of course, the housing 110 may also be made of other materials, and this embodiment does not impose any specific limitations on this.

[0076] In some embodiments, the battery 100 further includes a terminal post 111, which passes through the housing 110 and is electrically connected to the tab of the cell assembly 120. The main function of the terminal post 111 is to conduct the electrical charge on the tab of the cell assembly 120 to the outside of the housing 110 for easy use.

[0077] In some embodiments, the electrode post 111 is generally made of a material with good electrical conductivity, such as copper or aluminum.

[0078] It should be noted that the cell body 121 is the smallest charging and discharging unit. The cell body 121 has a positive electrode, a negative electrode, and a separator disposed between the two, and is formed by winding or stacking.

[0079] The positive electrode sheet includes a positive current collector and a positive active material layer, which can be one or two layers; that is, the positive active material layer is located on one side of the positive current collector, or the positive active material layer is located on opposite sides of the positive current collector.

[0080] For example, the positive current collector can be made of metal materials such as aluminum foil, nickel foil, or stainless steel, or a composite foil formed by combining metal and insulating materials.

[0081] For example, the positive electrode active material layer includes a positive electrode active material, a conductive agent, a binder, etc., and the positive electrode active material includes one or more lithium-containing positive electrode active materials such as lithium iron phosphate, ternary materials containing nickel, cobalt, and manganese, and lithium manganese iron phosphate.

[0082] Similarly, the negative electrode sheet includes a negative current collector and a negative active material layer, which can be one or two layers; that is, the negative active material layer is located on one side of the negative current collector, or the negative active material layer is located on opposite sides of the negative current collector.

[0083] For example, the negative electrode current collector can be made of metal materials such as copper foil, aluminum foil, or stainless steel, or it can be a composite foil material formed by combining metal and insulating materials.

[0084] For example, the negative electrode active material layer includes a negative electrode active material, a conductive agent, a binder, etc., and the negative electrode active material includes one or more of the following: artificial graphite, natural graphite, silicon carbide, silicon oxide, lithium titanate, etc.

[0085] The tab serves as the current output terminal of the battery cell. The tab is either integrated with or separately connected to the positive or negative electrode.

[0086] The separator, as an insulating layer, is used to prevent short circuits inside the battery cell 100 caused by contact between the positive and negative electrode plates. As a semi-permeable layer, the separator prevents larger molecules from passing through while allowing smaller charged ions to pass through.

[0087] It should be noted that the presence of the heat insulation component 130 effectively isolates the high temperature generated by the battery cell during thermal runaway, preventing the high temperature from being directly transferred to the outer casing 110, thereby reducing the risk of damage to the outer casing 110 material due to high temperature. The heat insulation component 130 also prevents high-speed gas from directly impacting the outer casing 110, reducing the possibility of damage to the outer casing 110 and maintaining the structural integrity of the battery 100.

[0088] In addition, to ensure that the ejected material from the battery cell body 121 is only ejected from the explosion-proof valve 112, the heat insulation component 130 needs to reserve the position of the guide hole 1311 to ensure the directional jet of the battery cell.

[0089] It should be noted that the heat insulation component 130 has the characteristic of high temperature resistance. When the battery cell body 121 experiences thermal runaway, the high temperature mixture inside the battery cell body 121 is ejected from the guide hole 1311 and then ejected by the explosion-proof valve 112 to achieve directional discharge.

[0090] In some embodiments, the heat insulation element 130 is connected to the housing 110 in the form of, but not limited to, coating, bonding, etc.

[0091] In some embodiments, the material of the heat insulation component 130 should be a substance that is resistant to high temperature, corrosion, and insulation, insoluble in electrolyte and does not react with electrolyte, including but not limited to sheets or coatings made of mica sheets, alumina ceramics, silicon dioxide, ceramic oxides, silicates, aluminum silicate fibers, etc., and the thickness of the heat insulation component 130 should be less than 2 mm.

[0092] With the above-mentioned configuration, namely, with the configuration of the heat insulation component 130, the impact of high temperature and high speed gas on the outer casing 110 can be isolated when the battery cell is thermally runaway, preventing the outer casing 110 from being damaged, and also preventing the problem of non-directional jetting.

[0093] Because the large surfaces of the battery cell body 121 are closely arranged with each other, they provide a certain degree of protection for the outer shell 110 of the large surface of the battery cell body 121. Furthermore, the bottom of the battery cell body 121 is in contact with the liquid cooling plate, which provides heat dissipation and constraint.

[0094] Therefore, there is no need to install heat insulation components 130 on the large surface of the battery 100 and the bottom of the cell body 121. In addition, the aluminum shell has a high thermal conductivity, and reserving a certain non-insulated area can ensure the heat dissipation of the cell. The non-directional jet battery 100 that suppresses thermal runaway has low manufacturing cost, strong operability, and ensures both protection effect and cooling performance.

[0095] In some alternative embodiments, the projection of the guide hole 1311 along the thickness direction of the battery 100 is located within the explosion-proof valve 112.

[0096] It should be noted that the projection of the guide hole 1311 is precisely matched with the position of the explosion-proof valve 112, ensuring that in the event of thermal runaway of the battery 100, the gas can directly enter the explosion-proof valve 112 through the guide hole 1311, reducing the retention and disturbance of gas inside the battery 100 and improving the efficiency of gas release.

[0097] It should be noted that X represents the length direction of battery 100, and Z represents the thickness direction of battery 100.

[0098] By ensuring that the gas is released along a predetermined path, the risk of gas buildup inside the battery 100 is reduced, thereby reducing the likelihood of the battery 100 exploding or other dangerous situations.

[0099] The precise positioning of the guide hole 1311 allows for more efficient use of the internal space of the battery 100, avoiding space waste caused by unnecessary gas flow paths.

[0100] In some alternative embodiments, the explosion-proof valve 112 has an arc-shaped structure;

[0101] The guide hole 1311 is an elliptical hole, and the size of the guide hole 1311 is 1mm-2mm larger than the size of the explosion-proof valve 112.

[0102] It should be noted that the guide hole 1311 is slightly larger than the explosion-proof valve 112, so that in the event of thermal runaway, the gas can enter the explosion-proof valve 112 more quickly through the guide hole 1311, reducing the resistance during the gas release process, improving the efficiency of gas release, increasing the exhaust area, and enhancing the diffusion of heat.

[0103] Since the guide hole 1311 is slightly larger than the explosion-proof valve 112, even if there are minor alignment errors during manufacturing and assembly, the gas can still pass smoothly through the guide hole 1311, which improves the system's fault tolerance and reduces the risk of functional failure due to assembly errors.

[0104] In addition, the combination of the arc-shaped explosion-proof valve 112 and the elliptical guide hole 1311 helps to evenly distribute the stress during gas release, reduces the damage to the material caused by local stress concentration, and extends the service life of the battery 100.

[0105] For example, the size of the guide hole 1311 is 1 mm larger, or 1.5 mm larger, or 2 mm larger than the size of the explosion-proof valve 112.

[0106] In some alternative embodiments, the housing 110 includes a lower housing 113 and an upper cover plate 114, with an opening in the lower housing 113 and the upper cover plate 114 covering the opening and forming a receiving cavity;

[0107] The pole post 111 is located on the upper cover plate 114.

[0108] It should be noted that by combining the lower housing 113 with the upper cover 114 to form a closed receiving cavity, good structural stability is provided, ensuring that the battery cell assembly 120 is well protected inside.

[0109] The design of the top cover 114 makes the assembly and maintenance of the battery 100 more convenient. The battery cell assembly 120 can be installed, inspected or replaced by simply removing the top cover 114, which improves maintenance efficiency.

[0110] For example, the terminal post 111 is placed on the upper cover plate 114, which makes the electrical connection of the battery 100 more convenient and reliable. The position design of the terminal post 111 facilitates the connection of external circuits and reduces the complexity of electrical connection.

[0111] In some alternative embodiments, the heat insulation element 130 includes a first heat insulation plate 131 located between the top of the cell body 121 and the upper cover plate 114.

[0112] Both the guide hole 1311 and the clearance hole 1312 are provided on the first heat insulation plate 131.

[0113] It should be noted that the first heat insulation plate 131 is located between the cell body 121 and the upper cover plate 114, which can effectively isolate the heat generated by the cell and prevent the heat from being directly transferred to the upper cover plate 114, thereby protecting the upper cover plate 114 and its components (such as the pole post 111) from high temperature.

[0114] The guide hole 1311 and the clearance hole 1312 ensure that gas can be released through a predetermined path in the event of thermal runaway of the battery cell. The guide hole 1311 is matched with the position of the explosion-proof valve 112 to ensure that gas can be released smoothly through the explosion-proof valve 112, while the clearance hole 1312 provides the necessary space for the pole post 111 to ensure the stability of the electrical connection.

[0115] By setting a first heat insulation plate 131 between the cell body 121 and the upper cover plate 114, the physical impact generated during thermal runaway of the cell can be effectively buffered, protecting the upper cover plate 114 and the outer casing 110 structure, and extending the service life of the battery 100.

[0116] In addition, the presence of the heat insulation panel not only provides thermal protection, but also prevents the generation of non-directional airflow through reasonable hole design, reducing the safety risks caused by improper gas release.

[0117] In some alternative embodiments, there are at least two pole posts 111, and at least two pole posts 111 are spaced apart along the length of the battery 100, with the explosion-proof valve 112 located between the at least two pole posts 111;

[0118] There are at least two clearance holes 1312. Along the length of the battery 100, at least two clearance holes 1312 are spaced apart, and a guide hole 1311 is located between the at least two clearance holes 1312.

[0119] It should be noted that by arranging at least two terminals 111 spaced apart along the length of the battery 100, a more stable and reliable electrical connection is provided, which can effectively reduce electrical interference and improve the performance and efficiency of the battery 100.

[0120] The explosion-proof valve 112 is located between the poles 111, and the guide hole 1311 is located between the clearance hole 1312. This arrangement ensures that in the event of thermal runaway of the battery cell, the gas can be effectively released through the guide hole 1311 to the explosion-proof valve 112, reducing the retention and disturbance of gas inside the battery 100 and lowering the risk of explosion.

[0121] In some alternative embodiments, the heat insulation member 130 further includes a second heat insulation plate 132, which is connected to the first heat insulation plate 131 and is located between the side of the cell body 121 and the side wall of the lower housing 113.

[0122] The extension direction of the second heat insulation plate 132 is at an angle to the extension direction of the first heat insulation plate 131.

[0123] It should be noted that by adding a second heat insulation plate 132, the side of the cell body 121 is also effectively thermally isolated, which can more comprehensively prevent heat from being transferred to the casing 110 and improve the overall thermal management capability of the battery 100. By adding heat insulation protection to the side of the cell, the thermal shock to the casing 110 in the event of thermal runaway of the cell is further reduced, reducing the risk of damage to the casing 110 material and battery 100 explosion.

[0124] The second heat insulation plate 132 forms an angle with the first heat insulation plate 131, providing additional mechanical support, enhancing the stability of the internal components of the battery 100, and reducing the risk of component displacement or damage due to vibration or impact.

[0125] The reasonable angle design ensures the effective use of internal space, avoids unnecessary space waste, and at the same time ensures the functional integration and performance optimization of Battery 100.

[0126] In some embodiments, the first heat insulation plate 131 and the second heat insulation plate 132 are integrated into a single design, which simplifies the manufacturing and assembly process, reduces the number of components and assembly steps, and improves production efficiency.

[0127] In some alternative embodiments, there are at least two second heat insulation plates 132, located on opposite sides of the first heat insulation plate 131 along the length of the battery 100.

[0128] It should be noted that by providing at least two second heat insulation plates 132 on opposite sides of the first heat insulation plate 131, the side of the cell body 121 is more comprehensively thermally isolated, effectively preventing heat from being transferred to the casing 110 through the side, and improving the overall thermal management capability of the battery 100.

[0129] The symmetrically arranged second heat insulation plate 132 helps to evenly distribute the mechanical and thermal stress inside the battery 100, enhances the structural stability of the battery 100, and reduces the risk of component displacement or damage caused by external impact or vibration.

[0130] By adding thermal insulation protection on both sides of the battery cell, the thermal shock to the casing 110 during thermal runaway of the battery cell is further reduced, thereby reducing the risk of damage to the casing 110 material and explosion of the battery 100.

[0131] In some alternative embodiments, at least one of the first heat insulation plate 131 and the second heat insulation plate 132 has a flange 133 extending toward the cell body 121.

[0132] It should be noted that the design of the flange 133 increases the contact area between the first heat insulation plate 131 and the second heat insulation plate 132 and the cell body 121, thereby providing more effective thermal isolation, which can better prevent heat from being transferred to the casing 110 and improve the overall thermal management capability of the battery 100.

[0133] The flange 133 provides additional mechanical support, enhancing the rigidity and stability of the first insulation plate 131 and the second insulation plate 132.

[0134] With the design of the flange 133, the first heat insulation plate 131 and the second heat insulation plate 132 can better cover the edge of the cell body 121, further reducing the thermal shock to the casing 110 when the cell thermal runaway occurs, and reducing the risk of damage to the casing 110 material and battery 100 explosion.

[0135] In some embodiments, the flange 133 extends 1-2 mm into the larger surface of the cell body 121, thereby strengthening the protection of the narrow side of the upper cover 114 and the lower housing 113.

[0136] The battery provided in this application embodiment includes: a casing having a receiving cavity, with terminals and an explosion-proof valve disposed on the casing; a cell assembly located within the receiving cavity, the cell assembly including a cell body; and a heat insulation component disposed within the receiving cavity, with at least a portion of the heat insulation component located between the cell body and the top of the casing; wherein the heat insulation component has a guide hole and a clearance hole, the position of the guide hole matching the position of the explosion-proof valve, and the terminals passing through the clearance hole for electrical connection with the cell body.

[0137] By incorporating thermal insulation components, the impact of high-temperature and high-speed gas on the casing can be isolated during thermal runaway of the battery cell, preventing damage to the casing and preventing non-directional jetting issues.

[0138] In addition, this application embodiment also provides an electric vehicle, including the battery 100 described above.

[0139] It should be noted that the specific structure of battery 100 will not be discussed in detail here; please refer to the above.

[0140] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0141] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0142] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery (100), characterized in that, include: The outer casing (110) has a receiving cavity, and the outer casing (110) is provided with a pole (111) and an explosion-proof valve (112); A battery cell assembly (120) is located within the receiving cavity, and the battery cell assembly (120) includes a battery cell body (121); A heat insulation element (130) is disposed within the receiving cavity, and at least a portion of the heat insulation element (130) is located between the top of the cell body (121) and the outer casing (110); The heat insulation component (130) has a guide hole (1311) and a clearance hole (1312). The position of the guide hole (1311) matches the position of the explosion-proof valve (112). The pole (111) passes through the clearance hole (1312) to be electrically connected to the battery cell body (121).

2. The battery (100) according to claim 1, characterized in that, Along the thickness direction of the battery (100), the projection of the guide hole (1311) is located inside the explosion-proof valve (112).

3. The battery (100) according to claim 2, characterized in that, The explosion-proof valve (112) has an arc-shaped structure; The guide hole (1311) is an elliptical hole, and the size of the guide hole (1311) is 1mm-2mm larger than the size of the explosion-proof valve (112).

4. The battery (100) according to any one of claims 1 to 3, characterized in that, The outer shell (110) includes a lower shell (113) and an upper cover plate (114). An opening is provided on the lower shell (113), and the upper cover plate (114) covers the opening and forms the receiving cavity. The pole post (111) is located on the upper cover plate (114).

5. The battery (100) according to claim 4, characterized in that, The heat insulation component (130) includes a first heat insulation plate (131), which is located between the top of the battery cell body (121) and the upper cover plate (114). Both the guide hole (1311) and the clearance hole (1312) are formed on the first heat insulation plate (131).

6. The battery (100) according to claim 5, characterized in that, There are at least two pole posts (111), and at least two pole posts (111) are spaced apart along the length of the battery (100), and the explosion-proof valve (112) is located between at least two pole posts (111); There are at least two clearance holes (1312). Along the length of the battery (100), at least two clearance holes (1312) are spaced apart, and the guide hole (1311) is located between the at least two clearance holes (1312).

7. The battery (100) according to claim 5, characterized in that, The heat insulation component (130) further includes a second heat insulation plate (132), which is connected to the first heat insulation plate (131) and is located between the side of the battery cell body (121) and the side wall of the lower housing (113). The extension direction of the second heat insulation plate (132) is at an angle to the extension direction of the first heat insulation plate (131).

8. The battery (100) according to claim 7, characterized in that, There are at least two second heat insulation plates (132), and along the length of the battery (100), at least two second heat insulation plates (132) are located on opposite sides of the first heat insulation plate (131).

9. The battery (100) according to claim 7, characterized in that, At least one of the first heat insulation plate (131) and the second heat insulation plate (132) has a flange (133) extending toward the cell body (121).

10. An electric vehicle, characterized in that, Includes the battery (100) as described in any one of claims 1 to 9.

Images