Battery device and electric device

Abstract

The application provides a battery device and an electric device. The battery device comprises a battery cell, a box body and a temperature detection assembly. The battery cell has a pressure relief component for relieving the pressure inside the battery cell. The battery cell is accommodated in the box body. The box body has an exhaust passage for guiding the substances discharged from the pressure relief component to the outside of the box body. The temperature detection assembly comprises a protective shell and a temperature detection piece. The temperature detection piece is used for detecting the temperature in the exhaust passage. The protective shell is installed on the passage wall of the exhaust passage. At least part of the protective shell is located in the exhaust passage. At least part of the temperature detection piece is located in the exhaust passage. The temperature detection piece is accommodated in the accommodation cavity of the protective shell, so that the risk of damage of the temperature detection piece can be reduced. The protective shell is installed on the passage wall of the exhaust passage, so that the stability of the temperature detection assembly can be improved, and the ability of the temperature detection assembly to resist external impact can be improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery device and an electrical device. Background Technology

[0002] Batteries are widely used in new energy vehicles, electronic devices, and other fields. As the demand for batteries increases, higher requirements are being placed on their reliability. Utility Model Content

[0003] This application provides a battery device and an electrical device that can improve the reliability of the battery device.

[0004] In a first aspect, embodiments of this application provide a battery device, the battery device including a battery cell, a housing, and a temperature detection component; the battery cell has a pressure relief component for releasing internal pressure of the battery cell; the battery cell is housed in the housing, the housing having an exhaust channel for guiding substances discharged from the pressure relief component to the outside of the housing; the temperature detection component includes a protective shell and a temperature detection element, the temperature detection element for detecting the temperature within the exhaust channel, the protective shell being installed on the channel wall of the exhaust channel, at least a portion of the protective shell being located within the exhaust channel, at least a portion of the temperature detection element being located within the exhaust channel, the protective shell having a receiving cavity, and the temperature detection element being housed within the receiving cavity.

[0005] In the above technical solution, the substances discharged from the battery cells through the pressure relief component can be guided to the outside of the housing through the exhaust channel, which can reduce the internal pressure and temperature of the housing, thereby reducing the risk of fire, explosion, and other problems in the battery device and improving the reliability of the battery device. The temperature detection component detects the temperature within the exhaust channel, enabling timely acquisition of temperature information to determine whether substances are being discharged from the pressure relief component into the exhaust channel. If the temperature within the exhaust channel is higher than a preset range, it indicates that the battery cells are releasing pressure from the pressure relief component, allowing for timely protective measures to be taken, reducing the risk of fire, explosion, and other problems in the battery device and improving its reliability. The temperature detection component also includes a protective shell, in which the temperature detection component is housed. The protective shell protects the temperature detection component, reducing the risk of damage to it. The protective shell is installed on the channel wall of the exhaust channel, improving the stability of the temperature detection component and enhancing its resistance to external impacts.

[0006] In some embodiments of the first aspect of this application, the protective shell is provided with an opening that connects the receiving cavity and the exhaust passage.

[0007] In the above technical solution, by providing an opening in the protective shell, which connects the receiving cavity and the exhaust channel, the gas in the exhaust channel can enter the exhaust channel through the opening, which helps to improve the accuracy of temperature detection.

[0008] In some embodiments of the first aspect of this application, the protective shell extends along a first direction that intersects the extension direction of the exhaust passage, and the protective shell includes a sidewall disposed around an axis extending along the first direction, the sidewall being provided with the opening.

[0009] In the above technical solution, since the extension direction of the exhaust channel intersects with the first direction of the protective shell, and the protective shell has an opening on its side wall arranged around the axis of the extension direction of the first direction, the gas in the exhaust channel can enter the receiving cavity through the opening during the flow of the exhaust channel along the extension direction of the exhaust channel. This can shorten the path of the gas into the receiving cavity and facilitate timely detection of the temperature in the exhaust channel.

[0010] In some embodiments of the first aspect of this application, the opening is provided at least one end of the protective shell along the first direction.

[0011] In the above technical solution, since the protective shell has an opening at at least one end along the first direction, the gas in the exhaust channel can enter the exhaust channel through the opening in the first direction and the opening in the side wall, so that the gas in the exhaust channel can quickly enter the receiving cavity, which is beneficial to improving the accuracy and efficiency of temperature detection.

[0012] In some embodiments of the first aspect of this application, the temperature detection assembly further includes a wire and a connecting terminal. Along the first direction, one end of the protective shell is provided with a lead-out hole, and the other end is provided with the opening. One end of the wire is connected to the temperature detection element, and the other end of the wire passes through the lead-out hole and is connected to the connecting terminal. The connecting terminal is used to connect to a receiving device.

[0013] In the above technical solution, along the first direction, one end of the protective shell is provided with a lead-out hole, and the other end is provided with an opening. The wire can then pass through the protective shell from the opening end along the first direction to the lead-out hole end, facilitating the assembly of the protective shell and the wire. One end of the wire is connected to the temperature sensing element, and the other end of the wire passes through the lead-out hole and connects to a connection terminal. The connection terminal is used to connect to a receiving device, facilitating data transmission.

[0014] In some embodiments of the first aspect of this application, the opening located at the end of the protective shell away from the lead-out hole along the first direction is a first opening; the temperature detection component further includes a covering member located within the receiving cavity and covering the temperature detection member; the receiving cavity includes a first chamber and a second chamber, the second chamber connecting the first chamber and the lead-out hole, the cross-sectional area of ​​the first chamber perpendicular to the first direction being greater than the cross-sectional area of ​​the second chamber perpendicular to the first direction, a stepped surface being formed at the end of the first chamber near the second chamber, at least a portion of the temperature detection member and at least a portion of the covering member being located within the first chamber, in the direction pointing from the first opening to the lead-out hole, a portion of the orthographic projection of the covering member being located within the stepped surface.

[0015] In the above technical solution, by covering the temperature sensor with a protective cover, the risk of damage to the temperature sensor can be reduced, and the reliability of the temperature sensor can be improved. The receiving cavity includes a first chamber and a second chamber. The second chamber connects the first chamber and the outlet hole. The cross-sectional area of ​​the first chamber perpendicular to the first direction is larger than that of the second chamber perpendicular to the first direction. A stepped surface is formed at the end of the first chamber near the second chamber. At least a portion of the temperature sensor and at least a portion of the protective cover are located in the first chamber, so that a large gap can be formed between the outer surface of the portion of the protective cover covering the temperature sensor and the cavity wall of the first receiving cavity. This facilitates the gas in the exhaust channel to surround the outer periphery of the temperature sensor, thereby improving the accuracy of the temperature sensor detection. Along the direction from the first opening to the outlet hole, a portion of the orthographic projection of the protective cover is located within the stepped surface. The protective cover can then abut against the stepped surface, so that the stepped surface restricts the movement of the protective cover and the temperature sensor from the direction from the first opening to the outlet hole, reducing the risk of the temperature sensor detaching from the protective shell and improving the stability and reliability of the temperature sensor.

[0016] In some embodiments of the first aspect of this application, the sidewall is provided with a plurality of openings, which are spaced apart circumferentially along the sidewall.

[0017] In the above technical solution, by providing multiple openings on the sidewall, the efficiency of gas entering the containment cavity of the protective shell in the exhaust channel can be improved, which is beneficial to improving detection efficiency. The multiple openings are spaced circumferentially along the sidewall, allowing the gas entering the containment cavity from the openings to surround the temperature sensing element, which is beneficial to improving detection accuracy.

[0018] In some embodiments of the first aspect of this application, at least one of the openings is oriented parallel to the extension direction of the exhaust passage.

[0019] In the above technical solution, by having at least one opening oriented parallel to the extension direction of the exhaust channel, the gas in the exhaust channel can directly enter the receiving cavity during the flow process, shortening the contact path between the temperature detection element and the gas in the exhaust channel, and facilitating timely detection of the temperature in the exhaust channel.

[0020] In some embodiments of the first aspect of this application, at least a portion of the orthographic projection of the temperature sensing element is located within the opening along its orientation.

[0021] In the above technical solution, by having at least a portion of the orthographic projection of the temperature sensing element located inside the opening along its orientation, the gas in the exhaust channel can directly enter the receiving cavity during its flow, shortening the contact path between the temperature sensing element and the gas in the exhaust channel, and facilitating timely detection of the temperature in the exhaust channel.

[0022] In some embodiments of the first aspect of this application, there is a gap between the temperature sensing element and the inner surface of the sidewall, and the opening provided in the sidewall communicates with the gap.

[0023] In the above technical solution, since there is a gap between the temperature detection element and the inner surface of the side wall, and the opening in the side wall is connected to the gap, the gas in the exhaust channel can enter the gap through the opening, so that the gas can surround the temperature detection element in the receiving cavity, thereby improving the accuracy of temperature detection.

[0024] In some embodiments of the first aspect of this application, the battery device further includes a cover member located within the receiving cavity and covering the temperature sensing element, the gap being formed between the outer surface of the cover member and the inner surface of the sidewall.

[0025] In the above technical solution, by covering the temperature sensor sidewall with a covering, the risk of damage to the temperature sensor can be reduced, and the reliability of the temperature sensor can be improved. By forming a gap between the outer surface of the covering and the inner surface of the sidewall, gas entering the gap from the opening can circulate around the covering within the receiving cavity, thereby indirectly circling the temperature sensor and improving the accuracy of temperature detection.

[0026] In some embodiments of the first aspect of this application, the temperature detection assembly further includes a wire and a connecting terminal, the wire connecting the temperature detection element and the connecting terminal, and the connecting terminal being used for connection with a receiving device; the cover includes a first portion and a second portion, the area enclosed by the outer contour of the cross-section of the first portion being smaller than the area enclosed by the outer contour of the cross-section of the second portion; the temperature detection element includes a detection body and a lead wire, the wire being connected to the lead wire, the detection body being located within the first portion, the connection position of the wire and the lead wire being located in the second portion, and the width of the portion of the gap between the outer surface of the first portion and the inner surface of the sidewall being greater than the width of the portion between the outer surface of the second portion and the inner surface of the sidewall.

[0027] In the above technical solution, by placing the temperature detection element in the first part and the connection position of the wire and lead wire in the second part, the width of the gap between the outer surface of the first part and the inner surface of the sidewall is greater than the width of the gap between the outer surface of the second part and the inner surface of the sidewall, a larger space is provided for the outer periphery of the detection body, which facilitates the gas to surround the temperature detection element and improves the detection accuracy. It also reduces the space between the second part and the sidewall, which helps to limit the shaking degree of the temperature detection element and improve the stability of the temperature detection assembly.

[0028] In some embodiments of the first aspect of this application, the battery device further includes a cover located within the receiving cavity and covering the temperature sensing element.

[0029] In the above technical solution, the temperature detection component is included in the encapsulation component. The encapsulation component can protect the temperature detection component, reduce the risk of damage to the temperature detection component, and improve the reliability of the temperature detection component.

[0030] In some embodiments of the first aspect of this application, the covering includes an insulating material.

[0031] In the above technical solution, since the temperature detection component is a low-voltage component, the risk of short circuit in the battery device caused by the temperature detection component can be reduced by the covering component including insulating material, thereby improving the reliability of the battery device and the reliability of the temperature detection component.

[0032] In some embodiments of the first aspect of this application, the covering is configured as a structure comprising one or more materials selected from Teflon and epoxy resin.

[0033] In the above technical solution, Teflon and epoxy resin have good heat resistance and cold resistance, and can adapt to environments with large temperature differences. The coating is constructed to include one or more of the following materials: Teflon and epoxy resin. This results in good heat resistance and cold resistance of the coating, which enables the coating to better protect the temperature sensing element and improve the reliability of the temperature sensing element.

[0034] In some embodiments of the first aspect of this application, the minimum wall thickness of the covering is H, where H ≥ 0.6 mm.

[0035] In the above technical solution, by having a minimum wall thickness of 0.6 mm or greater, the cladding component has better protective performance and improves the reliability of the temperature detection component.

[0036] In some embodiments of the first aspect of this application, the protective shell extends along a first direction, which intersects with the extension direction of the exhaust channel, and the length of the covering member along the first direction is L1, where 2mm≤L1≤4mm.

[0037] In the above technical solution, by having a length of 2mm or more along the first direction for the covering component, it is beneficial to have a larger covering area, thereby increasing the covering area of ​​the temperature detection component and improving its reliability. By having a length of 4mm or less along the first direction for the covering component, the space occupied by the covering component can be reduced, which is beneficial to reducing the volume of the temperature detection component and thus reducing the space occupied by the temperature detection component inside the housing, thereby improving the energy density of the battery device. Therefore, 2mm≤L1≤4mm not only increases the covering area of ​​the temperature detection component and improves its reliability, but also reduces the space occupied by the temperature detection component inside the housing, thereby improving the energy density of the battery device.

[0038] In some embodiments of the first aspect of this application, the water absorption rate of the covering is less than or equal to 0.5%.

[0039] In the above technical solution, the water absorption rate of the covering is less than or equal to 0.5%, which makes the water absorption of the covering poor and the waterproof performance of the covering good. This reduces the risk of the temperature detection component being damaged by the liquid inside the box and improves the reliability of the temperature detection component.

[0040] In some embodiments of the first aspect of this application, the temperature detection component further includes a wire and a connecting terminal; the protective housing is also provided with a lead-out hole, the wire passes through the lead-out hole, one end of the wire inside the protective housing is connected to the temperature detection element, and the other end of the wire outside the protective housing is connected to the connecting terminal.

[0041] In the above technical solution, the wire is passed through the lead-out hole of the protective shell. The end of the wire inside the protective shell is connected to the temperature detection element, and the end of the wire outside the protective shell is connected to the connection terminal. This facilitates the connection of the temperature detection element and the connection terminal to the wire and facilitates signal transmission.

[0042] In some embodiments of the first aspect of this application, the battery device further includes a seal that is at least partially located within the lead-out hole and disposed around the wire.

[0043] In the above technical solution, by having the seal at least partially located inside the lead-out hole and surrounding the wire, the seal can seal the connection between the lead-out hole and the wire, thereby improving the sealing performance of the temperature detection component and thus improving the reliability of the temperature detection component.

[0044] In some embodiments of the first aspect of this application, the battery device further includes a cover, the cover being located within the receiving cavity and covering the temperature sensing element; both the cover and the seal cover a portion of a wire, the wire including an exposed section, a first covered section covered by the cover, and a second covered section covered by the seal, the exposed section connecting the first covered section and the second covered section.

[0045] In the above technical solution, the sheathing component includes a portion of the conductor and a temperature sensing element. The sheathing component protects both the conductor and the temperature sensing element, as well as their connection point, reducing the risk of damage to the temperature sensing element and improving the connection strength between the temperature sensing element and the conductor, thus enhancing the reliability of the temperature sensing element. The exposed section of the conductor connects the first and second sheathing sections, allowing for better flexibility in the exposed section of the temperature sensing component, providing a buffering effect and improving its resistance to impact.

[0046] In some embodiments of the first aspect of this application, the length of the exposed section along the extension direction of the conductor is L2, where 1mm ≤ L2 ≤ 3mm.

[0047] In the above technical solution, the exposed section length along the extension direction of the conductor is greater than or equal to 1 mm. This results in a longer exposed section with good flexibility between the sealing and covering components of the temperature sensing component, providing better buffering and improving the impact resistance of the temperature sensing component. Conversely, the exposed section length along the extension direction of the conductor is less than or equal to 3 mm. This results in a smaller uncovered area of ​​the conductor, which is beneficial for improving the conductor's strength and extending its lifespan. Therefore, 1 mm ≤ L² ≤ 3 mm gives the temperature sensing component strong resistance to external impacts and also helps to improve the conductor's strength and extend its service life.

[0048] In some embodiments of the first aspect of this application, a portion of the seal is located within the outlet hole, and another portion of the seal extends out of the outlet hole and is located outside the protective housing, with the portion of the seal extending out of the outlet hole connected to the wire.

[0049] In the above technical solution, a portion of the seal is located inside the outlet hole, while another portion extends out of the outlet hole and is located outside the protective shell. The portion of the seal extending out of the outlet hole connects to the wire. This design not only provides good sealing performance between the protective shell and the wire but also increases the connection area between the wire and the seal, improving the connection stability. When the seal is molded by potting, the fact that a portion of the seal extends out of the outlet hole and is located outside the protective shell eliminates the need for precise control of the potting volume during the potting process, thus reducing the difficulty of potting.

[0050] In some embodiments of the first aspect of this application, the sealant includes a sealant.

[0051] In the above technical solution, the sealing element, including the sealant, can not only provide sealing performance between the protective shell and the wire, but also ensure good connection stability between the sealant and the protective shell, as well as between the sealant and the wire.

[0052] In some embodiments of the first aspect of this application, the channel wall is provided with a mounting hole, the protective shell passes through the mounting hole and extends into the receiving cavity, the protective shell is provided with a mounting part, the mounting part protrudes from the outer peripheral surface of the protective shell, the mounting part is located outside the exhaust channel and connected to the channel wall.

[0053] In the above technical solution, the protective shell passes through the mounting hole provided in the channel wall and extends into the receiving cavity, facilitating the temperature detection element located inside the protective shell to detect the temperature inside the exhaust channel. The mounting part is located outside the exhaust channel and connected to the channel wall, making it easy to install the protective shell onto the channel wall. Furthermore, the mounting part does not occupy space within the exhaust channel, reducing the risk of the temperature detection component interfering with the delivery of substances discharged from the pressure relief component through the exhaust channel.

[0054] In some embodiments of the first aspect of this application, the mounting portion is riveted to the channel wall.

[0055] In the above technical solution, the installation part is riveted to the channel wall, which makes the installation of the installation part and the channel wall more convenient and has better connection stability.

[0056] In some embodiments of the first aspect of this application, the protective shell and the mounting portion form an integrally molded structure.

[0057] In the above technical solution, the protective shell and the mounting part form an integral molded structure, which makes the structure formed by the protective shell and the mounting part have better strength.

[0058] In some embodiments of the first aspect of this application, the receiving cavity contains a plurality of the temperature sensing elements.

[0059] In the above technical solution, the cavity contains multiple temperature sensors, which can simultaneously detect multiple sets of temperature data, thus facilitating accurate assessment of the temperature within the exhaust channel.

[0060] In some embodiments of the first aspect of this application, the protective shell comprises an insulating material.

[0061] In the above technical solution, by including insulating material in the protective shell, the risk of poor insulation between the low-voltage temperature detection device and the channel wall or other metals of the exhaust channel can be effectively reduced, thereby improving the reliability of the temperature detection component and the battery device.

[0062] In some embodiments of the first aspect of this application, the housing has a receiving space for accommodating the battery cell, and the battery device further includes an exhaust component housed within the receiving space, with an exhaust passage formed in the exhaust component.

[0063] In the above technical solution, the battery device also includes an exhaust component housed within the housing space. An exhaust channel is formed within the exhaust component, facilitating its proper arrangement within the housing to smoothly discharge substances released from the pressure relief component. The exhaust channel is positioned on the exhaust component housed within the housing, simplifying its formation.

[0064] Secondly, embodiments of this application also provide an electrical device, including the battery device provided in any embodiment of the first aspect.

[0065] In the above technical solutions, the battery device provided in any embodiment of the first aspect has better reliability, which is beneficial to improving the power reliability of the power-consuming device powered by the battery device. Attached Figure Description

[0066] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0067] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0068] Figure 2 Exploded views of battery devices provided in some embodiments of this application;

[0069] Figure 3 Temperature detection components installed on the channel wall of the exhaust channel are provided in some embodiments of this application;

[0070] Figure 4 This is a schematic diagram from another perspective of a temperature detection assembly installed on the channel wall of an exhaust channel, as provided in some embodiments of this application.

[0071] Figure 5 for Figure 4 A sectional view along line A1-A1;

[0072] Figure 6 This is a schematic diagram of the structure of the protective shell provided in some embodiments of this application;

[0073] Figure 7 A schematic diagram from another perspective of the protective shell provided in some embodiments of this application;

[0074] Figure 8 for Figure 7 A sectional view along line A2-A2;

[0075] Figure 9 This is a schematic diagram of the structure of a temperature detection component provided in some embodiments of this application;

[0076] Figure 10 This is a schematic diagram of the structure of a temperature detection component provided in some embodiments of this application from another perspective;

[0077] Figure 11 for Figure 10 A sectional view along line A3-A3;

[0078] Figure 12 This is a structural schematic diagram from another perspective of the temperature detection component provided in some embodiments of this application;

[0079] Figure 13 for Figure 12 A sectional view along line A3-A3;

[0080] Figure 14 This application provides schematic diagrams of the assembled cover, temperature sensing element, and seal for some embodiments;

[0081] Figure 15 Cross-sectional views of an exhaust component are provided for some embodiments of this application.

[0082] Icons: 1000 - Vehicle; 100 - Battery assembly; 10 - Housing; 11 - First housing; 12 - Second housing; 20 - Battery cell; 30 - Temperature detection component; 31 - Protective shell; 311 - Receiving cavity; 3111 - First chamber; 3112 - Second chamber; 3113 - Stepped surface; 3114 - First chamber wall; 3115 - Second chamber wall; 312 - Opening; 312' - First opening; 313 - Side wall; 314 - Lead-out hole; 32 - Temperature detection component; 321 - Detection body; 322 - Lead wire; 33 - Conductor wire; 331 - First covering section; 332 - Second covered section; 333 - Exposed section; 34 - Connecting terminal; 35 - Covering component; 351 - First part; 352 - Second part; 36 - Seal; 361 - First sealing part; 362 - Second sealing part; 37 - Mounting part; 371 - First fixing hole; 40 - Exhaust component; 41 - Exhaust passage; 42 - Passage wall; 421 - Mounting hole; 422 - Second fixing hole; 50 - Connector; 200 - Controller; 300 - Motor; X - First direction; Y - Extension direction of exhaust passage; Q - Gap; Q1 - First gap; Q2 - Second gap; M - Accommodation space. Detailed Implementation

[0083] 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 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.

[0084] 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.

[0085] 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.

[0086] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" 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 communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0087] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0088] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0089] In this application, "multiple" means two or more (including two).

[0090] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0091] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0092] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, reduces the risk of short circuits while allowing active ions to pass through.

[0093] In some embodiments, the positive electrode can be a positive electrode sheet, which may include a positive current collector and a positive active material disposed on at least one surface of the positive current collector.

[0094] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0095] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, it can be aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium, etc. Composite current collectors can include a polymer material base layer and a metal layer. Composite current collectors can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0096] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials in battery cells may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium phosphate may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), lithium iron phosphate and carbon composites, lithium manganese phosphate (such as LiMnPO4), lithium manganese phosphate and carbon composites, lithium iron manganese phosphate, and lithium iron manganese phosphate and carbon composites. Examples of lithium transition metal oxide may include, but are not limited to, lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, and lithium nickel cobalt manganese oxide (such as LiNi). 1 / 3 Co 1 / 3Mn 1 / 3 O2 (also known as NCM) 333 LiNi 0.5 Co 0.2 Mn 0.3 O2 (also known as NCM) 523 LiNi 0.5 Co 0.25 Mn 0.25 O2 (also known as NCM) 211 LiNi 0.6 Co 0.2 Mn 0.2 O2 (also known as NCM) 622 LiNi 0.8 Co 0.1 Mn 0.1 O2 (also known as NCM) 811 ), lithium nickel cobalt aluminum oxide (such as LiNi) 0.85 Co 0.15 Al 0.05At least one of O2 and its modified compounds.

[0097] In some embodiments, the positive electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloys, etc. When foamed metal is used as the positive electrode, the surface of the foamed metal may or may not contain a positive electrode active material. As an example, lithium source material, potassium metal, or sodium metal can also be filled and / or deposited within the foamed metal, where the lithium source material is lithium metal and / or a lithium-rich material.

[0098] In some embodiments, the negative electrode can be a negative electrode sheet, and the negative electrode sheet can include a negative current collector.

[0099] As an example, the negative electrode current collector can be a metal foil, a foamed metal, or a composite current collector. For example, as a metal foil, it can be aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium, etc. Foamed metal can be nickel foam, copper foam, aluminum foam, foam alloy, etc. Composite current collectors can include a polymer material base layer and a metal layer. Composite current collectors can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0100] As an example, the negative electrode sheet may include a negative current collector and a negative active material disposed on at least one surface of the negative current collector.

[0101] As an example, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0102] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cells. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this application is not limited to these materials, and other conventional materials that can be used as negative electrode active materials in battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0103] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0104] In some embodiments, the separator is a separator membrane. The separator membrane can be any known porous structure separator membrane with good chemical and mechanical stability.

[0105] As an example, the material of the separator may include at least one of glass fiber, nonwoven fabric, polyethylene, polypropylene, and polyvinylidene fluoride. The separator may be a single-layer film or a multi-layer composite film. When the separator is a multi-layer composite film, the materials of each layer may be the same or different. The separator may be a separate component located between the positive and negative electrodes, or it may be attached to the surfaces of the positive and negative electrodes.

[0106] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0107] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The electrolyte can be liquid, gel-like, or solid. Liquid electrolytes include electrolyte salts and solvents.

[0108] In some embodiments, the electrolyte salt may include at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalate borate, lithium dioxalate borate, lithium difluorodioxalate phosphate, and lithium tetrafluorooxalate phosphate.

[0109] In some embodiments, the solvent may include at least one selected from ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butyl carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent may also be an ether solvent. Ether solvents may include one or more selected from ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyl tetrahydrofuran, diphenyl ether, and crown ethers.

[0110] Among them, the gel electrolyte includes a polymer as the electrolyte backbone network, combined with an ionic liquid - lithium salt.

[0111] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0112] As an example, polymer solid electrolytes can be polyether (polyoxyethylene), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids-lithium salts, cellulose, etc.

[0113] As an example, inorganic solid electrolytes may include one or more of the following: oxide solid electrolytes (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON thin film), sulfide solid electrolytes (crystalline lithium superconducting ion conductor (lithium germanium phosphate sulfide, silver sulfide germanium ore), amorphous sulfides), halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes.

[0114] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0115] In some embodiments, the electrode assembly is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0116] In some implementations, the electrode assembly is a stacked structure.

[0117] As an example, multiple positive and negative electrode plates can be set, and multiple positive and multiple negative electrode plates can be stacked alternately.

[0118] As an example, multiple positive electrode sheets can be set, and negative electrode sheets are folded to form multiple stacked folded segments, with a positive electrode sheet sandwiched between adjacent folded segments.

[0119] As an example, both the positive and negative electrode sheets are folded to form multiple stacked folded segments.

[0120] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0121] As an example, the separator can be continuously arranged between any adjacent positive or negative electrode plates by folding or rolling.

[0122] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0123] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0124] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0125] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells.

[0126] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0127] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging multiple battery cells and fixing them together to form an independent module.

[0128] As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0129] In some embodiments, the battery device may be a battery pack, which may include a housing and one or more individual battery cell assemblies housed within the housing.

[0130] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0131] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0132] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0133] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0134] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0135] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0136] The battery pack includes a housing and individual battery cells, with the individual cells housed within the housing. Each battery cell includes a pressure relief component. This component releases pressure within the cell when it becomes excessive, reducing the risk of explosion due to overpressure. After pressure relief, the high-temperature gases inside the cell are exhausted to the outside of the housing through an exhaust channel. Therefore, temperature detection within the exhaust channel is required. Existing temperature sensors are located within the exhaust channel to detect the temperature. However, these sensors are structurally fragile and prone to damage during installation or when the battery pack is subjected to impact, thus affecting their reliability and consequently the reliability of the entire battery pack.

[0137] Based on the above considerations, in order to improve the reliability of the battery device, this application provides a battery device including a battery cell, a housing, and a temperature detection component; the battery cell has a pressure relief component for releasing the pressure inside the battery cell; the battery cell is housed in the housing, which has an exhaust channel for guiding substances discharged from the pressure relief component to the outside of the housing; the temperature detection component includes a protective shell and a temperature detection element for detecting the temperature inside the exhaust channel, the protective shell is installed on the channel wall of the exhaust channel, at least a portion of the protective shell is located inside the exhaust channel, at least a portion of the temperature detection element is located inside the exhaust channel, the protective shell has a receiving cavity, and the temperature detection element is housed in the receiving cavity.

[0138] Substances discharged from the battery cells through the pressure relief component are guided to the outside of the casing via the exhaust channel. This reduces internal pressure and temperature, lowering the risk of fire or explosion and improving the reliability of the battery system. The temperature detection component monitors the temperature within the exhaust channel, allowing for timely assessment of whether substances are being released from the pressure relief component. If the temperature exceeds a preset range, it indicates pressure relief from the battery cells, enabling immediate protective measures to further reduce the risk of fire or explosion and enhance reliability. The temperature detection component also includes a protective shell, housing the temperature sensor within its cavity. The shell protects the sensor, reducing the risk of damage. The protective shell, mounted on the exhaust channel wall, enhances the stability and resistance to external impacts of the temperature detection component.

[0139] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells and battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0140] For ease of explanation, the following embodiments will use a vehicle 1000 as an example of electrical equipment.

[0141] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 may be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000.

[0142] The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0143] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0144] Please refer to Figure 2 , Figure 2 The exploded view of a battery device 100 provided in some embodiments of this application shows that the battery device 100 may include a housing 10 and a battery cell 20, wherein the housing 10 is used to house the battery cell 20.

[0145] The housing 10 has an enclosed space inside for accommodating the battery cells 20. The housing 10 can have various structures. In some embodiments, the housing 10 may include a first housing 11 and a second housing 12, which are interlocked. The first housing 11 and the second housing 12 can have various shapes, such as cuboids or cylinders. The first housing 11 can be a hollow structure open on one side, and the second housing 12 can also be a hollow structure open on one side. The open side of the second housing 12 interlocks with the open side of the first housing 11, thus forming a housing 10 with an enclosed space. Alternatively, the first housing 11 can be a hollow structure open on one side, and the second housing 12 can be a plate-like structure, with the second housing 12 interlocked with the open side of the first housing 11, thus forming a housing 10 with an accommodating space M.

[0146] In the battery device 100, there can be one or more battery cells 20. If there are multiple battery cells 20, they can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel. Alternatively, multiple battery cells 20 can be first connected in series, parallel, or in a mixed configuration to form a battery module, and then multiple battery modules can be connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing 10. Another option is that all battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the whole consisting of all battery cells 20 is housed within the housing 10.

[0147] In some embodiments, the battery device 100 may further include a busbar (not shown in the figure), through which multiple battery cells 20 can be electrically connected to each other to achieve series, parallel, or mixed connection of multiple battery cells 20. The busbar can be a metal conductor, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0148] like Figures 2-5 As shown, the battery device 100 includes a battery cell 20, a housing 10, and a temperature detection assembly 30. The battery cell 20 has a pressure relief component (not shown) for releasing the pressure inside the battery cell 20. The battery cell 20 is housed within the housing 10, which has an exhaust channel 41 for guiding substances discharged from the pressure relief component to the outside of the housing 10. The temperature detection assembly 30 includes a protective shell 31 and a temperature detection element 32 for detecting the temperature inside the exhaust channel 41. The protective shell 31 is mounted on the channel wall 42 of the exhaust channel 41, with at least a portion of the protective shell 31 located inside the exhaust channel 41. At least a portion of the temperature detection element 32 is located inside the exhaust channel 41. The protective shell 31 has a receiving cavity 311, in which the temperature detection element 32 is housed.

[0149] The pressure relief component can be an element or part that is actuated to release internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold. This threshold design varies depending on design requirements. The threshold may depend on one or more materials of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 20. The pressure relief component can take the form of an explosion-proof valve, explosion-proof disc, gas valve, pressure relief valve, or safety valve, and can specifically employ pressure-sensitive or temperature-sensitive elements or structures. That is, when the internal pressure or temperature of the battery cell 20 reaches the predetermined threshold, the pressure relief component actuates or a weak structure within the pressure relief component is damaged, thereby forming an opening or channel for the release of internal pressure or temperature.

[0150] The term "actuation" as used in this application refers to the activation or actuation of the pressure relief component to a certain state, thereby releasing the internal pressure and temperature of the battery cell 20. The action of the pressure relief component may include, but is not limited to, at least a portion of the pressure relief component rupturing, breaking, tearing, or opening. When the pressure relief component is actuated, the high-temperature, high-pressure substances inside the battery cell 20 are discharged outwards from the actuated portion. This method allows for pressure and temperature relief of the battery cell 20 under controllable pressure or temperature, thereby preventing potentially more serious accidents.

[0151] The channel wall 42 of the exhaust channel 41 is a wall portion that surrounds the exhaust channel 41. The exhaust channel 41 may be formed on the wall portion of the housing 10, in which case the channel wall 42 of the exhaust channel 41 is part of the wall portion of the housing 10. The exhaust channel 41 may also be formed on other components housed within the housing 10. Exemplarily, the battery device 100 further includes an exhaust component 40, on which the exhaust channel 41 is formed.

[0152] The protective shell 31 is a structure with a certain degree of hardness and strength, so that the protective shell 31 has a certain ability to resist external forces.

[0153] The protective housing 31 can be directly installed on the channel wall 42. The protective housing 31 can also be indirectly installed on the channel wall 42.

[0154] At least a portion of the protective housing 31 is located within the exhaust passage 41, at least a portion of the receiving cavity 311 of the protective housing 31 is located within the exhaust passage 41, and at least a portion of the temperature sensing element 32 is located within the receiving cavity 311. Thus, at least a portion of the temperature sensing element 32 is located within the exhaust passage 41 to facilitate the detection of the temperature within the exhaust passage 41.

[0155] Temperature sensing element 32 may include thermocouples, resistance temperature detectors (RTDs), thermistors, etc. For example, temperature sensing element 32 may include a thermistor ceramic.

[0156] The channel wall 42 can be equipped with one temperature detection component 30 or multiple temperature detection components 30, such as two temperature detection components 30, three temperature detection components 30, four or more temperature detection components 30. Figure 5 The diagram shows a case where the channel wall 42 is equipped with two temperature sensing components 30.

[0157] The material discharged from the pressure relief component by the battery cell 20 can be guided to the outside of the housing 10 through the exhaust channel 41, which can reduce the internal pressure and temperature of the housing 10, reduce the risk of fire or explosion of the battery device 100, and improve the reliability of the battery device 100. The temperature of the exhaust channel 41 is detected by the temperature detection element 32 of the temperature detection component 30, which can obtain the temperature information of the exhaust channel 41 in a timely manner, thereby determining whether the material is discharged from the pressure relief component into the exhaust channel 41. If the temperature of the exhaust channel 41 is higher than the preset range value, it means that the battery cell 20 is relieving pressure from the pressure relief component, and protective measures can be taken in time to reduce the risk of fire or explosion of the battery device 100 and improve the reliability of the battery device 100. The temperature detection component 30 also includes a protective shell 31, and the temperature detection element 32 is housed in the receiving cavity 311 of the protective shell 31. The protective shell 31 protects the temperature detection element 32 and can reduce the risk of damage to the temperature detection element. The protective shell 31 is installed on the channel wall 42 of the exhaust channel 41, which can improve the stability of the temperature detection component 30 and improve the ability of the temperature detection component 30 to resist external impact.

[0158] like Figures 5-8 As shown, in some embodiments, the protective shell 31 is provided with an opening 312, which connects the receiving cavity 311 and the exhaust passage 41.

[0159] The opening 312 extends through the wall of the protective shell 31 to connect the receiving cavity 311 and the exhaust passage 41. The protective shell 31 may have one opening 312 or multiple openings 312.

[0160] By providing an opening 312 in the protective shell 31, which connects the receiving cavity 311 and the exhaust channel 41, the gas in the exhaust channel 41 can enter the exhaust channel 41 through the opening 312, which helps to improve the accuracy of temperature detection.

[0161] like Figures 5-8 As shown, in some embodiments, the protective shell 31 extends along a first direction X, which intersects with the extension direction Y of the exhaust passage. The protective shell 31 includes a sidewall 313 disposed around an axis extending along the first direction X, and the sidewall 313 is provided with an opening 312.

[0162] The protective shell 31 extends along the first direction X, thus its size along the first direction X is the largest. The sidewall 313 is a closed structure surrounding an axis extending along the first direction X. The shape of the cross-section of the sidewall 313 perpendicular to the first direction X can be various, such as circular, rectangular, elliptical, etc. For example, as shown... Figure 6As shown, the cross-sectional shape of the sidewall 313 perpendicular to the first direction X is circular. The sidewall 313 is provided with an opening 312, which penetrates the sidewall 313 along the direction perpendicular to the first direction X.

[0163] The side wall 313 can be provided with one opening 312 or multiple openings 312.

[0164] Since the exhaust channel extends in the Y direction and intersects with the first direction X of the protective shell 31, and the protective shell 31 has an opening 312 on its side wall 313 which is arranged around the axis of the first direction X, the gas in the exhaust channel 41 can enter the receiving cavity 311 through the opening 312 as it flows along the extension direction Y of the exhaust channel. This shortens the path of the gas into the receiving cavity 311 and is beneficial for timely detection of the temperature in the exhaust channel 41.

[0165] like Figure 6 , Figure 8 As shown, in some embodiments, at least one end of the protective shell 31 is provided with an opening 312 along the first direction X.

[0166] Along the first direction X, the protective shell 31 may have an opening 312 at one end, and the protective shell 31 may have openings 312 at both opposite ends. In some embodiments, the opening 312 at one end of the protective shell 31 along the first direction X may serve as the inlet for the temperature sensing element 32 to enter the receiving cavity 311.

[0167] In an embodiment where an opening 312 is provided at least one end of the protective shell 31 along the first direction X, the protective shell 31 may only have an opening 312 at at least one end in the first direction X, or the protective shell 31 may have an opening 312 at at least one end in the first direction X, or it may also have an opening 312 on the side wall 313.

[0168] With an opening 312 provided at least at one end of the protective shell 31 along the first direction X, the gas in the exhaust channel 41 can enter the exhaust channel 41 through the opening 312 on the first direction X and the opening 312 on the side wall 313, so that the gas in the exhaust channel 41 can quickly enter the receiving cavity 311, which is beneficial to improving the accuracy and efficiency of temperature detection.

[0169] like Figures 9-11 As shown, in some embodiments, the temperature detection component 30 further includes a wire 33 and a connection terminal 34. Along the first direction X, one end of the protective shell 31 is provided with a lead-out hole 314 and the other end is provided with an opening 312. One end of the wire 33 is connected to the temperature detection element 32, and the other end of the wire 33 passes through the lead-out hole 314 and is connected to the connection terminal 34. The connection terminal 34 is used to connect to a receiving device (not shown in the figure).

[0170] The wire 33 connects the temperature sensor 32 and the connecting terminal 34, enabling signal transmission between them. The temperature signal detected by the temperature sensor 32 can be transmitted to the receiving device via the wire 33 and the connecting terminal 34. The connecting terminal 34 can have various structural forms, such as a male plug, a female plug, or an aircraft clip. The receiving device can be a circuit board, a control system, etc.

[0171] In some embodiments, the temperature sensing element 32 includes a sensing body 321 and a lead wire 322, the lead wire 322 connecting the sensing body 321 and the wire 33. Exemplarily, the sensing body 321 may be a thermistor ceramic.

[0172] A lead-out hole 314 and an opening 312 are disposed opposite to each other at both ends of the protective shell 31 along the first direction X. The cross-sectional area of ​​the opening 312 opposite to the lead-out hole 314 can be larger than the cross-sectional area of ​​the other openings 312, so that the temperature sensing element 32 and the wire 33 can enter the receiving cavity 311 from the opening 312 opposite to the lead-out hole 314.

[0173] Of course, the opening 312 opposite to the outlet hole 314 can also be the same as other openings 312 of the protective shell 31.

[0174] Along the first direction X, one end of the protective housing 31 is provided with a lead-out hole 314, and the other end is provided with an opening 312. The wire 33 can pass through the protective housing 31 from the end with the opening 312 along the first direction X to the lead-out hole 314, facilitating the assembly of the protective housing 31 and the wire 33. One end of the wire 33 is connected to the temperature sensing element 32, and the other end of the wire 33 passes through the lead-out hole 314 and connects to the connection terminal 34. The connection terminal 34 is used to connect to the receiving device, facilitating data transmission.

[0175] like Figures 11-13 As shown, in some embodiments, along the first direction X, an opening 312 disposed at the end of the protective shell 31 away from the outlet hole 314 is the first opening 312; the temperature detection assembly 30 also includes a covering 35, which is located in the receiving cavity 311 and covers the temperature detection element 32; the receiving cavity 311 includes a first chamber 3111 and a second chamber 3112, the second chamber 3112 connects the first chamber 3111 and the outlet hole 314, the cross-sectional area of ​​the first chamber 3111 perpendicular to the first direction X is greater than the cross-sectional area of ​​the second chamber 3112 perpendicular to the first direction X, a stepped surface 3113 is formed at the end of the first chamber 3111 near the second chamber 3112, at least a portion of the temperature detection element 32 and at least a portion of the covering 35 are located in the first chamber 3111, along the direction from the first opening 312 to the outlet hole 314, a portion of the orthographic projection of the covering 35 is located in the stepped surface 3113.

[0176] The covering element 35 covers the temperature sensing element 32. The covering element 35 is at least partially located within the receiving cavity 311. The covering element 35 may be entirely located within the receiving cavity 311, or it may be partially located within the receiving cavity 311. The temperature sensing element 32 may be entirely covered by the covering element 35, or it may be partially covered by the covering element 35.

[0177] The cover 35 can be made of an insulating material to reduce the risk of a short circuit in the battery device 100 caused by the temperature detection element 32. The cover 35 can have a low water absorption rate to provide good waterproof performance and improve the reliability of the temperature detection element 32.

[0178] The first chamber 3111 and the second chamber 3112 are connected along a first direction X. The first chamber 3111 has a first chamber wall 3114 and a stepped surface 3113. The first chamber wall 3114 is arranged around an axis extending along the first direction X. Along the first direction X, the stepped surface 3113 is connected to one end of the first chamber wall 3114, and a first opening 312 is formed at the end of the first chamber wall 3114 opposite to the stepped surface 3113. The shape of the cross-section of the first chamber 3111 perpendicular to the first direction X can be circular, rectangular, elliptical, etc. The area of ​​the cross-section of the first chamber 3111 perpendicular to the first direction X is the area enclosed by the intersection of the first chamber wall 3114 and the plane perpendicular to the first direction X.

[0179] The second chamber 3112 extends from the stepped surface 3113 in a direction away from the first chamber 3111. The first chamber 3111 has a second chamber wall 3115, which is arranged around an axis extending along a first direction X. Along the first direction X, the stepped surface 3113 is connected to one end of the second chamber wall 3115, connecting the first chamber wall and the second chamber wall 3115. An outlet hole 314 is formed at the end of the second chamber wall 3115 opposite to the stepped surface 3113. The shape of the cross-section of the second chamber 3112 perpendicular to the first direction X can be circular, rectangular, elliptical, etc. The area of ​​the cross-section of the second chamber 3112 perpendicular to the first direction X is the area enclosed by the intersection of the second chamber wall 3115 and the plane perpendicular to the first direction X.

[0180] The shape of the first chamber 3111 and the shape of the second chamber 3112 can be the same, for example, as shown in the figure. Figure 11 , Figure 13 As shown, the first chamber 3111 and the second chamber 3112 are both circular. Of course, the shapes of the first chamber 3111 and the second chamber 3112 can be different; for example, the first chamber 3111 can be circular and the second chamber 3112 can be rectangular.

[0181] The temperature sensing element 32 can be partially housed within the first chamber 3111 or can be located entirely within the first chamber 3111. Figure 11 , Figure 13 The diagram shows the case where the temperature sensing element 32 is completely located in the first chamber 3111.

[0182] The covering 35 can be partially contained within the first chamber 3111 or can be completely located within the first chamber 3111. Figure 11 , Figure 13 The diagram shows the case where the covering 35 is completely located in the first chamber 3111.

[0183] The dimension of the cross section of the cover 35 perpendicular to the first direction X in at least one direction is greater than the dimension of the end of the first chamber 3111 located on the stepped surface 3113 in that direction, so that a portion of the orthographic projection of the cover 35 along the direction from the first opening 312 to the outlet hole 314 lies within the stepped surface 3113. In some embodiments, the orthographic projection of the outer contour of the cross section of the cover 35 perpendicular to the first direction X in the direction from the first opening 312 to the outlet hole 314 lies within the stepped surface 3113.

[0184] By covering the temperature sensor 32 with the cover 35, the risk of damage to the temperature sensor 32 can be reduced, and the reliability of the temperature sensor 32 can be improved. The receiving cavity 311 includes a first chamber 3111 and a second chamber 3112. The second chamber 3112 connects the first chamber 3111 and the outlet hole 314. The cross-sectional area of ​​the first chamber 3111 perpendicular to the first direction X is larger than the cross-sectional area of ​​the second chamber 3112 perpendicular to the first direction X. A stepped surface 3113 is formed at the end of the first chamber 3111 near the second chamber 3112. At least a portion of the temperature sensor 32 and at least a portion of the cover 35 are located in the first chamber 3111, so that a large gap Q can be formed between the outer surface of the portion of the cover 35 covering the temperature sensor 32 and the cavity wall surface of the first receiving cavity 311. This facilitates the gas in the exhaust channel 41 to surround the outer periphery of the temperature sensor 32, thereby improving the accuracy of the temperature sensor 32. If a portion of the orthographic projection of the covering 35 is located within the stepped surface 3113 along the direction from the first opening 312 to the outlet hole 314, then the covering 35 can abut against the stepped surface 3113, thereby restricting the movement of the covering 35 and the temperature sensing element 32 from the direction from the first opening 312 to the outlet hole 314, reducing the risk of the temperature sensing element 32 detaching from the protective shell 31, and improving the stability and reliability of the temperature sensing element 32.

[0185] In other embodiments, the area of ​​any cross section of the receiving cavity 311 perpendicular to the first direction X can be the same, reducing the manufacturing difficulty of the protective shell 31 and facilitating the manufacturing and shaping of the protective shell 31.

[0186] like Figure 6 , Figure 8 As shown, in some embodiments, the sidewall 313 is provided with a plurality of openings 312, which are spaced apart circumferentially along the sidewall 313.

[0187] Understandably, the plurality of openings 312 are circumferentially spaced along an axis parallel to the first direction X. The plurality of openings 312 may be equally spaced.

[0188] For example, such as Figure 6 , Figure 8 As shown, the side wall 313 is provided with two openings 312, which are spaced apart on the side wall 313 and located on opposite sides of the temperature sensing element 32 in the direction perpendicular to the first direction X.

[0189] By providing multiple openings 312 on the sidewall 313, the efficiency of gas entering the receiving cavity 311 of the protective shell 31 in the exhaust channel 41 can be improved, which is beneficial to improving detection efficiency. The multiple openings 312 are arranged circumferentially along the sidewall 313, so that the gas entering the receiving cavity 311 from the openings 312 can surround the temperature detection element 32, which is beneficial to improving detection accuracy.

[0190] like Figure 6 , Figure 8 As shown, in some embodiments, at least one opening 312 is oriented parallel to the extending direction Y of the exhaust passage.

[0191] The orientation of the opening 312 refers to the direction from the receiving cavity 311 to the outside of the protective shell 31 in the through direction of the opening 312.

[0192] The orientation of the opening 312 is parallel to the extension direction Y of the exhaust passage. The orientation of the opening 312 can be the same as the direction of gas flow in the exhaust passage 41, or it can be opposite to the direction of gas flow in the exhaust passage 41.

[0193] For example, such as Figure 8 As shown, the wall is provided with two openings 312 along the extension direction Y of the exhaust channel. The two openings 312 on the side wall 313 are respectively provided on opposite sides of the temperature sensing element 32. The orientation of one opening 312 is the same as the direction of gas flow in the exhaust channel 41, and the orientation of the other opening 312 is opposite to the direction of gas flow in the exhaust channel 41.

[0194] With at least one opening 312 oriented parallel to the extension direction Y of the exhaust channel, the gas in the exhaust channel 41 can directly enter the receiving cavity 311 during the flow process, shortening the contact path between the temperature detection element 32 and the gas in the exhaust channel 41, and facilitating timely detection of the temperature in the exhaust channel 41.

[0195] Of course, in other embodiments, the orientation of the opening 312 provided on the side wall 313 may also be set at an angle to the extension direction Y of the exhaust passage.

[0196] like Figures 10-13 As shown, in some embodiments, at least a portion of the orthographic projection of the temperature sensing element 32 is located within the opening 312 along the orientation of the opening 312.

[0197] When viewed along the orientation of the opening 312, at least a portion of the projection of the temperature sensing element 32 is located within the opening 312. Depending on the size of the opening 312, when viewed along the orientation of the opening 312, the projection of the temperature sensing element 32 may be partially located within the opening 312, or the entire projection of the temperature sensing element 32 may be located within the opening 312.

[0198] By ensuring that at least a portion of the orthographic projection of the temperature sensor 32 is located within the opening 312 along the orientation of the opening 312, the gas in the exhaust channel 41 can directly enter the receiving cavity 311 during its flow, thus shortening the contact path between the temperature sensor 32 and the gas in the exhaust channel 41 and facilitating timely detection of the temperature within the exhaust channel 41.

[0199] like Figures 10-13 As shown, in some embodiments, there is a gap Q between the temperature sensing element 32 and the inner surface of the sidewall 313, and the opening 312 provided in the sidewall 313 communicates with the gap Q.

[0200] A gap Q is provided between the outer peripheral surface of the temperature sensing element 32 and the inner surface of the side wall 313, and an opening 312 provided in the side wall 313 connects the gap Q and the exhaust channel 41.

[0201] Since there is a gap Q between the temperature sensing element 32 and the inner surface of the side wall 313, and the opening 312 provided in the side wall 313 is connected to the gap Q, the gas in the exhaust channel 41 can enter the gap Q through the opening 312, so that the gas can surround the temperature sensing element 32 in the receiving cavity 311, thereby improving the accuracy of temperature detection.

[0202] like Figures 10-13 As shown, in some embodiments, the battery device 100 further includes a cover 35 located within the receiving cavity 311 and covering the temperature sensing element 32, with a gap Q formed between the outer surface of the cover 35 and the inner surface of the sidewall 313.

[0203] At least a portion of the outer surface of the cover 35 does not contact the inner surface of the sidewall 313, so that a gap Q is formed between the outer surface of the cover 35 and the inner surface of the sidewall 313.

[0204] By enclosing the temperature sensor 32 with the cover 35, the risk of damage to the temperature sensor 32 can be reduced, and the reliability of the temperature sensor 32 can be improved. By forming a gap Q between the outer surface of the cover 35 and the inner surface of the sidewall 313, gas entering the gap Q from the opening 312 can circulate around the cover 35 within the receiving cavity 311, thereby indirectly circling the temperature sensor 32 and improving the accuracy of temperature detection.

[0205] like Figures 9-14 As shown, in some embodiments, the temperature detection assembly 30 further includes a wire 33 and a connection terminal 34. The wire 33 connects the temperature detection element 32 and the connection terminal 34, and the connection terminal 34 is used to connect to a receiving device. The cover 35 includes a first part 351 and a second part 352. The area enclosed by the outer contour of the cross-section of the first part 351 is smaller than the area enclosed by the outer contour of the cross-section of the second part 352. The temperature detection element 32 includes a detection body 321 and a lead wire 322. The wire 33 is connected to the lead wire 322. The detection body 321 is located inside the first part 351. The connection position of the wire 33 and the lead wire 322 is located in the second part 352. The width of the gap Q located between the outer surface of the first part 351 and the inner surface of the sidewall 313 is greater than the width of the gap Q located between the outer surface of the second part 352 and the inner surface of the sidewall 313.

[0206] In this embodiment, the detector 321 is completely covered by the first part 351, a part of the lead 322 is covered by the first part 351, and the other part of the lead 322 is covered by the second part 352.

[0207] The width of the gap Q located between the outer surface of the first portion 351 and the inner surface of the sidewall 313 refers to the distance between the outer surface of the first portion 351 and the inner surface of the sidewall 313. In the embodiment where the temperature sensing element 32 is completely located in the first chamber 3111, the width of the gap Q located between the outer surface of the first portion 351 and the inner surface of the sidewall 313 is the distance between the outer surface of the first portion 351 and the first chamber wall 3114.

[0208] The width of the gap Q located between the outer surface of the second portion 352 and the inner surface of the sidewall 313 refers to the distance between the outer surface of the second portion 352 and the inner surface of the sidewall 313. In the embodiment where the temperature sensing element 32 is completely located in the first chamber 3111, the width of the gap Q located between the outer surface of the second portion 352 and the inner surface of the sidewall 313 is the distance between the outer surface of the second portion 352 and the first chamber wall 3114.

[0209] The portion of gap Q located between the outer surface of the first part 351 and the inner surface of the side wall 313 is the first gap Q1, and the width of the first gap Q1 is H1. The portion of gap Q located between the outer surface of the second part 352 and the inner surface of the side wall 313 is the second gap Q2, and the width of the second gap Q2 is H2. Therefore, H1 > H2.

[0210] By placing the temperature sensing element 32 within the first part 351 and the connection point of the wire 33 and the lead wire 322 within the second part 352, the width of the gap Q between the outer surface of the first part 351 and the inner surface of the side wall 313 is greater than the width of the gap Q between the outer surface of the second part 352 and the inner surface of the side wall 313. This provides a larger space around the sensing element 321, facilitating gas envelopment of the temperature sensing element 32 and improving detection accuracy. It also reduces the space between the second part 352 and the side wall 313, which helps limit the degree of shaking of the temperature sensing element 32 and improves the stability of the temperature sensing assembly 30.

[0211] like Figure 11 , Figure 12 As shown, in some embodiments, the battery device 100 further includes a cover 35 located within the receiving cavity 311 and covering the temperature sensing element 32.

[0212] The temperature sensing element 32 is included in the cover 35. The cover 35 can protect the temperature sensing element 32, reduce the risk of damage to the temperature sensing element 32, and improve the reliability of the temperature sensing element 32.

[0213] In some embodiments, the cover 35 includes an insulating material.

[0214] That is, the covering 35 is a structure made of insulating material. For example, the covering 35 can be an encapsulating adhesive.

[0215] Since the temperature sensing element 32 is a low-voltage component, the use of insulating material in the covering element 35 can reduce the risk of the temperature sensing component 30 causing a short circuit in the battery device 100, thereby improving the reliability of both the battery device 100 and the temperature sensing element 32.

[0216] In some embodiments, the cover 35 is configured to include one or more materials selected from Teflon and epoxy resin.

[0217] The cladding 35 can be a structure formed from Teflon. The cladding 35 can also be a structure formed from epoxy resin. Alternatively, the cladding 35 can be a structure formed from both Teflon and epoxy resin.

[0218] Teflon and epoxy resin have good heat resistance and cold resistance, and can adapt to environments with large temperature differences. The covering 35 is constructed to include one or more of the following materials: Teflon and epoxy resin. This makes the covering 35 have good heat resistance and cold resistance, so that the covering 35 can better protect the temperature detection element 32 and improve the reliability of the temperature detection element 32.

[0219] like Figure 9 , Figure 13 , Figure 14 As shown, in some embodiments, the minimum wall thickness of the covering 35 is H, where H ≥ 0.6 mm.

[0220] The wall thickness of the cover 35 refers to the distance between the outer surface of the temperature sensing element 32 and the outer surface of the cover 35. Since the temperature sensing element 32 has an irregular structure, the wall thickness of the cover 35 can be different at different positions. For example, if the diameters of the sensing body 321 and the lead wire 322 are different, the wall thickness of the cover 35 at the position corresponding to the sensing body 321 is less than the wall thickness of the cover 35 at the position corresponding to the lead wire 322.

[0221] The minimum wall thickness H of the covering 35 is ≥ 0.6 mm. Understandably, the wall thickness of the covering 35 at any position is not less than 0.6 mm.

[0222] For example, H can be 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, etc.

[0223] By ensuring that the minimum wall thickness of the covering 35 is greater than or equal to 0.6 mm, the covering 35 has better protective performance and improves the reliability of the temperature detection element 32.

[0224] like Figure 14 As shown, in some embodiments, the protective shell 31 extends along a first direction X, which intersects with the extension direction Y of the exhaust channel. Along the first direction X, the length of the covering 35 is L1, where 2mm ≤ L1 ≤ 4mm.

[0225] If the protective shell 31 extends along the first direction X, then the size of the protective shell 31 along the first direction X is larger than the size of the protective shell 31 in other directions.

[0226] The length L1 of the covering member 35 along the first direction X is the distance between the two farthest ends of the covering member 35 along the first direction X. For example, L1 can be 2mm, 2.2mm, 2.4mm, 2.5mm, 2.6mm, 2.8mm, 3mm, 3.2mm, 3.4mm, 3.5mm, 3.6mm, 3.8mm, 4mm, etc.

[0227] By ensuring that the length of the covering component 35 along the first direction X is greater than or equal to 2 mm, it is beneficial for the covering component 35 to have a larger coverage area, thereby increasing the coverage area of ​​the temperature detection component 32 and improving the reliability of the temperature detection component 32. By ensuring that the length of the covering component 35 along the first direction X is less than or equal to 4 mm, the space occupied by the covering component 35 can be reduced, which is beneficial for reducing the volume of the temperature detection assembly 30, thereby reducing the space occupied by the temperature detection component 32 inside the housing 10 and improving the energy density of the battery device 100. Therefore, 2 mm ≤ L1 ≤ 4 mm not only increases the coverage area of ​​the temperature detection component 35 on the temperature detection component 32 and improves the reliability of the temperature detection component 32, but also reduces the space occupied by the temperature detection assembly 30 inside the housing 10, thereby improving the energy density of the battery device 100.

[0228] In some embodiments, the water absorption rate of the cover 35 is less than or equal to 0.5%.

[0229] The water absorption rate of the covering 35 can refer to the ability of the covering 35 to absorb moisture. The water absorption rate of the covering 35 can be 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, 0.5%, etc.

[0230] With the water absorption rate of the covering 35 being less than or equal to 0.5%, the water absorption of the covering 35 is poor, and the water resistance of the covering 35 is good. This reduces the risk of the temperature detection element 32 being damaged by the liquid inside the housing 10 and improves the reliability of the temperature detection element 32.

[0231] like Figures 9-13 As shown, in some embodiments, the temperature detection component 30 further includes a wire 33 and a connection terminal 34; the protective housing 31 is also provided with a lead-out hole 314, through which the wire 33 passes, with one end of the wire 33 inside the protective housing 31 connected to the temperature detection element 32, and the other end of the wire 33 outside the protective housing 31 connected to the connection terminal 34.

[0232] One end of the wire 33 extends into the receiving cavity 311 and connects to the lead 322 of the temperature sensing element 32. The other end of the wire 33 passes through the lead-out hole 314 to the outside of the protective housing 31 and connects to the connection terminal 34.

[0233] The wire 33 passes through the lead-out hole 314 of the protective shell 31. One end of the wire 33 inside the protective shell 31 is connected to the temperature detection element 32, and the other end of the wire 33 outside the protective shell 31 is connected to the connection terminal 34. This facilitates the connection of the temperature detection element 32 and the connection terminal 34 to the wire 33 and also facilitates signal transmission.

[0234] like Figures 9-13As shown, in some embodiments, the battery device 100 further includes a seal 36, which is at least partially located within the lead-out hole 314 and is disposed around the wire 33.

[0235] The seal 36 may be entirely located within the outlet hole 314, or it may be partially located within the outlet hole 314. Within the outlet hole 314, the seal 36 is arranged around the wire 33 and connects the hole wall of the outlet hole 314 and the outer peripheral surface of the wire 33.

[0236] The seal 36 can be a sealing ring, sealing strip, sealant, etc.

[0237] By having a seal 36 at least partially located within the lead-out hole 314 and surrounding the wire 33, the seal 36 can seal the connection between the lead-out hole 314 and the wire 33, thereby improving the sealing performance of the temperature sensing assembly 30 and thus improving the reliability of the temperature sensing element 32.

[0238] Combined with reference Figure 11 , Figure 12 , Figure 14 In some embodiments, the battery device 100 further includes a cover 35 located within the receiving cavity 311 and covering the temperature sensing element 32; both the cover 35 and the seal 36 cover a portion of the wire 33, the wire 33 including an exposed section 333, a first covered section 331 covered by the cover 35, and a second covered section 332 covered by the seal 36, the exposed section 333 connecting the first covered section 331 and the second covered section 332.

[0239] The first covered section 331 is connected to the temperature sensing element 32, and the connection point between the wire 33 and the temperature sensing element 32 is covered by the covered section 35. The covered section 35 and the sealing element 36 are spaced apart along the extension direction of the wire 33. The exposed section 333 is the portion located between the sealing element 36 and the covered section 35 that is not covered by either the sealing element 36 or the covered section 35. The exposed section 333 may be completely located within the receiving cavity 311, or it may be partially located within the receiving cavity 311 with the other part located within the outlet hole 314.

[0240] The sheathing 35, comprising a portion of the conductor 33 and the temperature sensing element 32, protects both the conductor 33 and the temperature sensing element 32, as well as their connection point. This reduces the risk of damage to the temperature sensing element 32 and enhances the connection strength between the two, thereby improving the reliability of the temperature sensing element 32. The exposed section 333 of the conductor 33 connects the first sheathing section 331 and the second sheathing section 332, providing better flexibility and cushioning for the temperature sensing assembly 30 in the exposed section 333, thus improving its impact resistance.

[0241] like Figure 14 As shown, in some embodiments, the length of the exposed section 333 along the extension direction of the conductor 33 is L2, 1mm≤L2≤3mm.

[0242] Along the extension direction of the conductor 33, the length L2 of the exposed section 333 can also be the distance between the covering 35 and the sealing member 36. For example, L2 can be 1mm, 1.2mm, 1.4mm, 1.5mm, 1.6mm, 1.8mm, 2mm, 2.2mm, 2.4mm, 2.5mm, 2.6mm, 2.8mm, 3mm, etc.

[0243] Along the extension direction of the conductor 33, the length of the exposed section 333 is greater than or equal to 1 mm. This results in a longer exposed section 333 of the temperature sensing component 30 with better flexibility between the seal 36 and the cover 35, providing better cushioning and improving the impact resistance of the temperature sensing component 30. Along the extension direction of the conductor 33, the length of the exposed section 333 is less than or equal to 3 mm. This results in a smaller uncovered area of ​​the conductor 33, which is beneficial for improving the strength and extending the lifespan of the conductor 33. Therefore, 1 mm ≤ L2 ≤ 3 mm gives the temperature sensing component 30 strong resistance to external impacts and also helps to improve the strength and extend the service life of the conductor 33.

[0244] like Figure 11 , Figure 13 and Figure 14 As shown, in some embodiments, a portion of the seal 36 is located inside the outlet hole 314, and another portion of the seal 36 extends out of the outlet hole 314 and is located outside the protective housing 31. The portion of the seal 36 extending out of the outlet hole 314 is connected to the wire 33.

[0245] The seal 36 includes a first sealing portion 361 and a second sealing portion 362 connected together. The first sealing portion 361 is located inside the outlet hole 314, which can be completely filled by the first sealing portion 361, or the first sealing portion 361 can fill only a portion of the outlet hole 314. The second sealing portion 362 can connect the wire 33 and the protective shell 31.

[0246] The first sealing part 361 and the second sealing part 362 can be separately configured and connected.

[0247] The first sealing part 361 and the second sealing part 362 can be integrally formed, that is, the sealing element 36 can be an integrally formed structure.

[0248] With a portion of the seal 36 located inside the outlet hole 314 and another portion extending out of the outlet hole 314 and outside the protective shell 31, and the portion of the seal 36 extending out of the outlet hole 314 connected to the wire 33, this design not only provides good sealing performance between the protective shell 31 and the wire 33, but also increases the connection area between the wire 33 and the seal 36, improving the connection stability between the seal 36 and the wire 33. When the seal 36 is molded by potting, with a portion of the seal 36 extending out of the outlet hole 314 and outside the protective shell 31, the potting process does not require overly precise control of the potting volume, thus reducing the potting difficulty.

[0249] In some embodiments, seal 36 includes sealant.

[0250] The sealant not only has good sealing performance, but also serves to connect the protective shell 31 and the wire 33.

[0251] The sealant can be applied to the outlet hole 314 by potting.

[0252] The sealant 36, which includes a sealant, provides a seal between the protective housing 31 and the wire 33, and also ensures good connection stability between the sealant and the protective housing 31, as well as between the sealant and the wire 33.

[0253] Combined with reference Figures 5-8 , Figure 15 In some embodiments, the channel wall 42 is provided with a mounting hole 421, the protective shell 31 passes through the mounting hole 421 and extends into the receiving cavity 311, the protective shell 31 is provided with a mounting part 37, the mounting part 37 protrudes from the outer peripheral surface of the protective shell 31, the mounting part 37 is located outside the exhaust channel 41 and is connected to the channel wall 42.

[0254] Mounting hole 421 penetrates through channel wall 42, and connects exhaust channel 41 and internal space of housing 10. Mounting part 37 can be circumferentially arranged around an axis extending along the first direction X.

[0255] The mounting part 37 and the protective shell 31 can be separate components that are then connected, such as by welding, bonding, or screwing.

[0256] The protective shell 31 is indirectly connected to the channel wall 42 via the mounting part 37. The mounting part 37 and the channel wall 42 can be fixedly connected, such as by welding or bonding. Alternatively, the mounting part 37 and the channel wall 42 can be detachably connected, such as by screws. Figure 5 , Figure 6As shown, the mounting part 37 is provided with a first fixing hole 371, and the channel wall 42 is provided with a second fixing hole 422. The first fixing hole 371 and the second fixing hole 422 are provided in a one-to-one correspondence. The connector 50 passes through the first fixing hole 371 and the second fixing hole 422 in sequence to connect the mounting part 37 and the channel wall 42. The connector 50 can be a bolt, screw, rivet, etc. Each mounting part 37 can be provided with one first fixing hole 371 or multiple first fixing holes 371.

[0257] The protective housing 31 passes through the mounting hole 421 provided in the channel wall 42 and extends into the receiving cavity 311, facilitating the temperature detection element 32 located inside the protective housing 31 to detect the temperature inside the exhaust channel 41. The mounting part 37 is located outside the exhaust channel 41 and connected to the channel wall 42, facilitating the installation of the protective housing 31 onto the channel wall 42. Furthermore, the mounting part 37 does not occupy space within the exhaust channel 41, reducing the risk that the temperature detection component 30 will interfere with the delivery of substances discharged from the pressure relief component through the exhaust channel 41.

[0258] In some embodiments, the mounting portion 37 is riveted to the channel wall 42.

[0259] Mounting section 37 and channel wall 42 can be riveted together with plastic rivets, i.e., connector 50 is a rivet. This reduces the risk of short circuits.

[0260] The mounting part 37 is riveted to the channel wall 42, making the installation of the mounting part 37 and the channel wall 42 more convenient and providing better connection stability.

[0261] In some embodiments, the protective shell 31 and the mounting part 37 form an integrally molded structure.

[0262] The protective shell 31 and the mounting part 37 are structures formed by an integral molding method, such as injection molding or stamping.

[0263] The protective shell 31 and the mounting part 37 form an integral structure, which makes the structure formed by the protective shell 31 and the mounting part 37 have better strength.

[0264] In some embodiments, the protective housing 31 includes an insulating material.

[0265] For example, the material of the protective shell 31 can be PPA plastic (high temperature resistant nylon), polyphenylene sulfide, PA66 (Polyadiohexylenediamine, commonly known as nylon-66), etc.

[0266] In the above technical solution, by including insulating material in the protective shell 31, the risk of poor insulation between the low-voltage temperature detection element 32 and the channel wall 42 of the exhaust channel 41 or other metals can be effectively reduced, thereby improving the reliability of the temperature detection component 30 and the battery device 100.

[0267] In some embodiments, the receiving cavity 311 contains a plurality of temperature sensing elements 32.

[0268] The cavity 311 can be equipped with two, three, four or more temperature sensing elements 32.

[0269] The cavity 311 contains multiple temperature sensors 32, which can simultaneously detect multiple sets of temperature data, thus facilitating accurate assessment of the temperature within the exhaust channel 41.

[0270] like Figures 3-5 , Figure 15 As shown, in some embodiments, the housing 10 has a receiving space M for accommodating the battery cell 20, and the battery device 100 further includes an exhaust component 40, which is received within the receiving space M, and an exhaust passage 41 is formed in the exhaust component 40.

[0271] The exhaust component 40 can be connected to the wall of the housing 10. The exhaust component 40 can be fixedly connected to the housing 10 to improve connection stability, for example, by welding or bonding the exhaust component 40 to the housing 10. The exhaust component 40 can also be detachably connected to the housing 10 to facilitate installation, maintenance, and replacement, for example, by connecting the exhaust component 40 to the housing 10 with screws.

[0272] The battery device 100 also includes an exhaust component 40, which is housed within the housing space M. An exhaust channel 41 is formed on the exhaust component 40, facilitating the proper arrangement of the exhaust component 40 within the housing 10 to smoothly discharge substances released from the pressure relief component. The exhaust channel 41 is positioned on the exhaust component 40 housed within the housing 10, simplifying the formation of the exhaust channel 41.

[0273] This application also provides an electrical device, which includes the battery device 100 provided in any of the above embodiments.

[0274] The battery device 100 provided in any of the above embodiments has good reliability, which is beneficial to improving the power reliability of the electrical device powered by the battery device 100.

[0275] This application embodiment also provides a battery device 100, which includes a housing 10, a battery cell 20, an exhaust component 40, and a plurality of temperature detection components 30; the battery cell 20 and the exhaust component 40 are both housed within the housing 10. The exhaust component 40 forms an exhaust channel 41. The exhaust channel 41 is used to guide substances discharged from the pressure relief component of the battery cell 20 to the outside of the housing 10. The temperature detection components 30 include a protective shell 31, a temperature detection element 32, a covering element 35, a wire 33, an electrode terminal, and a sealing element 36. The temperature detection element 32 is used to detect the temperature inside the exhaust channel 41. The exhaust channel 41 is provided with a mounting hole 421, which connects the exhaust channel 41 and the interior of the housing 10. The protective shell 31 passes through the mounting hole 421, and a portion of the protective shell 31 is housed within the exhaust channel 41. A mounting portion 37 protrudes from the outer periphery of the protective shell 31, and the mounting portion 37 is located outside the exhaust component 40 and riveted to the exhaust component 40. The protective housing 31 has a receiving cavity 311, in which a temperature sensing element 32 is received, such that at least a portion of the temperature sensing element 32 is located within an exhaust passage 41. A covering member 35 covers the temperature sensing element 32. The protective housing 31 extends along a first direction X, which intersects the extending direction Y of the exhaust passage. The protective housing 31 includes a sidewall 313 arranged around an axis extending in the first direction X. The sidewall 313 has two openings 312, which are arranged opposite each other perpendicular to the first direction X. One end of the protective housing 31 along the first direction X has an opening 312 (the first opening 312), and the other end has a lead-out hole 314. One end of a wire 33 is located within the receiving cavity 311 and connected to the temperature sensing element 32. The other end of the wire 33 passes through the lead-out hole 314 and exits the protective housing 31, connecting to a connecting terminal 34. The sealing member 36 is a sealant. A portion of the seal 36 is located within the outlet hole 314 to seal the connection between the outlet hole 314 and the wire 33; another portion of the seal 36 extends out of the outlet hole 314 and is located outside the protective shell 31, connecting the wire 33 and the protective shell 31. Both the covering 35 and the protective shell 31 are made of insulating materials. The protective shell 31 is cylindrical. The receiving cavity 311 includes a first chamber 3111 and a second chamber 3112, both of which are cylindrical spaces.The second chamber 3112 connects the first chamber 3111 and the outlet hole 314. The diameter of the first chamber 3111 is larger than the diameter of the second chamber 3112, so that the cross-sectional area of ​​the first chamber 3111 perpendicular to the first direction X is larger than the cross-sectional area of ​​the second chamber 3112 perpendicular to the first direction X. A stepped surface 3113 is formed at the end of the first chamber 3111 near the second chamber 3112. The temperature sensing element 32 and the covering element 35 are located in the first chamber 3111, pointing towards the outlet hole 314 along the first opening 312. A portion of the orthographic projection of the covering element 35 is located in the stepped surface 3113. The end of the covering element 35 away from the first opening 312 can abut against the stepped surface 3113. The covering 35 includes a first part 351 and a second part 352. The area enclosed by the outer contour of the cross section of the first part 351 is smaller than the area enclosed by the outer contour of the cross section of the second part 352. The temperature detection element 32 includes a detection body 321 and a lead wire 322. The wire 33 is connected to the lead wire 322. The detection body 321 is located inside the first part 351. The connection position of the wire 33 and the lead wire 322 is located in the second part 352. The width of the gap Q between the outer surface of the first part 351 and the inner surface of the sidewall 313 is greater than the width of the gap Q between the outer surface of the second part 352 and the inner surface of the sidewall 313.

[0276] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0277] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, include: A battery cell has a pressure relief component, which is used to release the pressure inside the battery cell. The housing contains the individual battery cells and has an exhaust channel for guiding substances discharged from the pressure relief component to the outside of the housing. A temperature detection assembly includes a protective housing and a temperature detection element, the temperature detection element being used to detect the temperature within the exhaust channel, the protective housing being installed on the channel wall of the exhaust channel, at least a portion of the protective housing being located within the exhaust channel, at least a portion of the temperature detection element being located within the exhaust channel, the protective housing having a receiving cavity, and the temperature detection element being received within the receiving cavity.

2. The battery device as claimed in claim 1, characterized in that, The protective shell is provided with an opening, which connects the receiving cavity and the exhaust passage.

3. The battery device as claimed in claim 2, characterized in that, The protective shell extends along a first direction, which intersects the extension direction of the exhaust channel. The protective shell includes a sidewall disposed around an axis extending along the first direction, and the sidewall is provided with the opening.

4. The battery device as claimed in claim 3, characterized in that, Along the first direction, at least one end of the protective shell is provided with the opening.

5. The battery device as claimed in claim 4, characterized in that, The temperature detection component further includes a wire and a connecting terminal. Along the first direction, one end of the protective shell is provided with a lead-out hole, and the other end is provided with the opening. One end of the wire is connected to the temperature detection element, and the other end of the wire passes through the lead-out hole and is connected to the connecting terminal. The connecting terminal is used to connect to a receiving device.

6. The battery device as claimed in claim 5, characterized in that, Along the first direction, the opening located at the end of the protective shell away from the outlet hole is the first opening; The temperature detection component further includes a covering element located within the receiving cavity and covering the temperature detection component; The receiving cavity includes a first chamber and a second chamber, the second chamber connecting the first chamber and the outlet hole. The cross-sectional area of ​​the first chamber perpendicular to the first direction is greater than the cross-sectional area of ​​the second chamber perpendicular to the first direction. A stepped surface is formed at one end of the first chamber near the second chamber. At least a portion of the temperature sensing element and at least a portion of the covering element are located in the first chamber, pointing towards the outlet hole along the first opening. A portion of the orthographic projection of the covering element is located within the stepped surface.

7. The battery device as claimed in claim 3, characterized in that, The sidewall is provided with a plurality of openings, which are spaced apart circumferentially along the sidewall.

8. The battery device as claimed in claim 7, characterized in that, At least one of the openings is oriented parallel to the extension direction of the exhaust passage.

9. The battery device as claimed in claim 3, characterized in that, At least a portion of the orthographic projection of the temperature sensing element is located within the opening, along the orientation of the opening.

10. The battery device as claimed in claim 3, characterized in that, There is a gap between the temperature sensing element and the inner surface of the sidewall, and the opening in the sidewall communicates with the gap.

11. The battery device as claimed in claim 10, characterized in that, The battery device further includes a cover, which is located within the receiving cavity and covers the temperature sensing element, and the gap is formed between the outer surface of the cover and the inner surface of the sidewall.

12. The battery device as claimed in claim 11, characterized in that, The temperature detection component further includes a wire and a connecting terminal, the wire connecting the temperature detection element and the connecting terminal, and the connecting terminal being used to connect to a receiving device; The covering includes a first part and a second part, wherein the area enclosed by the outer contour of the cross section of the first part is smaller than the area enclosed by the outer contour of the cross section of the second part. The temperature sensing element includes a sensing body and a lead wire. The lead wire is connected to the sensing body. The sensing body is located in the first part. The connection position between the lead wire and the lead wire is located in the second part. The width of the gap between the outer surface of the first part and the inner surface of the sidewall is greater than the width of the gap between the outer surface of the second part and the inner surface of the sidewall.

13. The battery device as claimed in claim 1, characterized in that, The battery device further includes a cover, which is located within the receiving cavity and covers the temperature sensing element.

14. The battery device as claimed in claim 13, characterized in that, The covering includes insulating material.

15. The battery device as claimed in claim 13, characterized in that, The covering is constructed to include one or more materials selected from Teflon and epoxy resin.

16. The battery device as claimed in claim 13, characterized in that, The minimum wall thickness of the covering is H, where H ≥ 0.6 mm.

17. The battery device as claimed in claim 13, characterized in that, The protective shell extends along a first direction, which intersects with the extension direction of the exhaust channel. Along the first direction, the length of the covering is L1, where 2mm ≤ L1 ≤ 4mm.

18. The battery device as claimed in claim 13, characterized in that, The water absorption rate of the coating is less than or equal to 0.5%.

19. The battery device according to any one of claims 1-18, characterized in that, The temperature detection component also includes wires and connecting terminals; The protective shell is also provided with an outlet hole, through which the wire passes. One end of the wire inside the protective shell is connected to the temperature detection element, and the other end of the wire outside the protective shell is connected to the connection terminal.

20. The battery device as claimed in claim 19, characterized in that, The battery device also includes a seal, which is at least partially located within the outlet hole and surrounding the wire.

21. The battery device as claimed in claim 20, characterized in that, The battery device further includes a cover, which is located within the receiving cavity and covers the temperature detection element; Both the covering and the sealing member cover a portion of the wire. The wire includes an exposed section, a first covered section covered by the covering member, and a second covered section covered by the sealing member. The exposed section connects the first covered section and the second covered section.

22. The battery device as claimed in claim 21, characterized in that, Along the extension direction of the conductor, the length of the exposed section is L2, where 1mm ≤ L2 ≤ 3mm.

23. The battery device as claimed in claim 20, characterized in that, A portion of the seal is located inside the outlet hole, and another portion of the seal extends out of the outlet hole and is located outside the protective shell. The portion of the seal extending out of the outlet hole is connected to the wire.

24. The battery device as claimed in claim 20, characterized in that, The sealant includes a sealant.

25. The battery device according to any one of claims 1-18, characterized in that, The channel wall is provided with mounting holes, the protective shell passes through the mounting holes and extends into the receiving cavity, the protective shell is provided with a mounting part, the mounting part protrudes from the outer peripheral surface of the protective shell, the mounting part is located outside the exhaust channel and is connected to the channel wall.

26. The battery device as claimed in claim 25, characterized in that, The mounting part is riveted to the channel wall.

27. The battery device as claimed in claim 25, characterized in that, The protective shell and the mounting part form an integral molded structure.

28. The battery device according to any one of claims 1-18, characterized in that, The cavity contains multiple temperature sensors.

29. The battery device according to any one of claims 1-18, characterized in that, The protective shell includes insulating material.

30. The battery device according to any one of claims 1-18, characterized in that, The housing has a receiving space for accommodating the individual battery cells. The battery device also includes an exhaust component, which is housed within the receiving space, and an exhaust channel is formed in the exhaust component.

31. An electrical device, characterized in that, Includes the battery device as described in any one of claims 1-30.

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