Battery and battery pack

Abstract

Battery characterized in that it comprises: a housing in which a receiving chamber is formed, wherein an explosion protection valve is provided on a side surface of the housing, and the explosion protection valve is configured to be opened at a preset pressure value; an electrode arrangement that is provided in the recording chamber; a support element provided between the side surface of the housing on which the explosion protection valve is located and the electrode assembly, wherein the support element comprises a support body having an annular shape and a vent channel enclosed and formed by the support body, wherein the vent channel is configured to cover the explosion protection valve, a plurality of projecting sections extending towards the vent channel are provided on two side sections of the support body along a width direction of the support body, and the plurality of projecting sections are arranged at intervals on the same side section along a length direction of the support element.

Description

AREA OF TECHNOLOGY

[0001] The present application relates to the technical field of batteries, in particular a battery and a battery pack. STATE OF THE ART

[0002] As battery technology continues to evolve, users are placing higher demands on batteries. To improve the safety performance of an individual battery cell, it is typically equipped with a pressure relief mechanism. If a malfunction occurs in a battery cell and gas builds up inside, this gas is released through the pressure relief mechanism, preventing explosions and other major safety incidents. An explosion-proof valve, such as the pressure relief mechanism, can be integrated into the battery casing. In a battery with a relatively long length, the explosion-proof valve is usually located on the side of the casing that is relatively long, to ensure a balanced gas flow path.This also avoids having to position the explosion protection valve at the end faces along the longitudinal direction, thus preventing an excessively long gas transport path. However, the limited space between the electrode pack and the inner wall of the housing's side face leads to significant resistance in gas transport within the battery, hindering the rapid escape of the gas contained in the battery and posing a safety risk.

[0003] To solve the above problem, a support element can be provided between the electrode assembly and the side surface of the housing to create a venting space. However, if the support area of ​​the element is too small, the electrode assembly can easily deform due to gravity, which can pose a safety risk. If the support area of ​​the element is too large, the venting space becomes too small, which can also lead to poor gas escape. In other words, the support element cannot simultaneously fulfill the requirements of providing support and gas venting.

[0004] If a battery experiences a short circuit in its internal cells or modules, is subjected to an impact, or if water enters the battery, a large quantity of high-temperature gas can be generated within a very short time and accumulate inside the battery. Therefore, batteries are typically equipped with an explosion-proof valve to release gas if gas is generated inside the battery due to abnormal operation, thus increasing battery safety and preventing major incidents.

[0005] In a relatively long battery, such as a blade battery, the explosion protection valve, intended to shorten the gas transport path in the event of thermal runaway and facilitate gas escape, is typically located on the side of the battery casing. However, the venting space between the casing's side and the cells is relatively small, resulting in greater resistance to gas transport within the battery. This hinders the rapid escape of gas from the battery and poses a safety risk.

[0006] Given the rapid advancements in vehicle technology, consumers are currently placing higher demands on the safety performance of these vehicles. The increased demands for battery capacity, range, and the use of systems with a high nickel content also raise the risk of battery runaway. If a short circuit occurs in the internal electrode assembly, if an impact takes place, or if water enters the battery, a large quantity of high-temperature gas can be generated and accumulate within a very short time. Therefore, to improve battery safety, batteries are typically equipped with an explosion-proof valve. If an abnormal operating condition causes gas to form inside the battery, the gas can be released through the explosion-proof valve, thus preventing major safety incidents.

[0007] In a relatively long battery, such as a blade battery, placing the explosion protection valve on the end cover plate of the battery casing would create a long gas path, hindering gas escape. Therefore, the explosion protection valve is typically located on the side of the battery casing to ensure a balanced gas path in the event of thermal runaway. However, the venting space between the casing side and the electrode assembly is relatively small, which can result in greater resistance to gas flow within the battery, hindering rapid gas escape and posing a safety risk.

[0008] As battery technologies continuously evolve, users are placing higher demands on batteries. To improve the safety performance of an individual battery cell, it is typically equipped with a pressure relief mechanism. If a malfunction occurs in a battery cell and gas builds up inside, this gas is released through the pressure relief mechanism, preventing explosions and other major safety incidents. An explosion-proof valve, like the pressure relief mechanism, can be integrated into the battery casing. For a battery with a relatively long length, the explosion-proof valve is usually located on the side of the casing that has a relatively long length, to ensure a balanced gas flow path.

[0009] This also avoids having to position the explosion protection valve at the end faces along the longitudinal direction, thus preventing an excessively long gas transport path. However, the limited space between the electrode array and the inner wall of the casing's side face results in significant resistance to gas transport within the battery, hindering the rapid escape of the gas. This inability to immediately release the gas from the battery poses a serious safety concern. SUMMARY OF THE INVENTION

[0010] Against this background, the present invention provides a battery and a battery pack to solve the problem that the support element in an existing battery cannot simultaneously meet the requirements of a support effect and the venting of gas.

[0011] According to the first aspect of the present invention, a battery is provided comprising: a housing in which a receiving chamber is formed, wherein an explosion protection valve is provided on a side surface of the housing, and the explosion protection valve is configured to be opened at a preset pressure value; an electrode arrangement which is provided in the receiving chamber;and a support element provided between the side surface of the housing on which the explosion protection valve is located and the electrode assembly, the support element comprising a support body having an annular shape and a vent channel enclosed and formed by the support body, the vent channel being configured to cover the explosion protection valve, a plurality of projecting sections extending towards the vent channel being provided on two side sections of the support body along a width direction of the support body, and the plurality of projecting sections being arranged at intervals on the same side section along a length direction of the support element.

[0012] Advantageous effects: By positioning the support element between the housing and the electrode assembly, the support element is located within the housing's receiving chamber. One side of the support element abuts the inner wall of the housing's side surface where the explosion protection valve is located, and the other side abuts the electrode assembly. This arrangement provides support between the electrode assembly and the housing, maintaining a certain distance between them. Meanwhile, the venting channel connects the space containing the electrode assembly to the explosion protection valve, facilitating gas flow within the receiving chamber, increasing the venting area, and ensuring that gas in the receiving chamber is rapidly released to the location of the explosion protection valve.This ensures that the explosion protection valve opens quickly at the preset pressure, guaranteeing battery safety. Furthermore, projecting sections on the support body increase its surface area, ensuring effective support. The size of these projecting sections is also relatively small compared to the support element itself, minimizing obstruction to gas escape through the vent. This allows the support element to simultaneously fulfill the requirements of providing support and gas venting, preventing the electrode assembly from being compressed or deformed while ensuring smooth gas evacuation.

[0013] In an optional embodiment, the projecting sections, which are located on different side sections, are arranged in an offset manner.

[0014] Advantageous effects: By staggering the protruding sections on opposite side sections, the direct alignment of the protruding sections is avoided, resulting in more venting space, less obstruction of the gas flow, and smoother venting. Compared to a structure where the protruding sections are directly opposite each other, the staggered arrangement of the protruding sections allows for a suitable increase in the lateral dimension of the protruding sections without compromising the smoothness of the gas venting. This arrangement also increases the support area, enabling the support element to provide more effective support for the electrode assembly.

[0015] In an optional embodiment, a total area of ​​the support element is “S”, and an area of ​​the support body is “S1”, where 0.3 ≤ S1 / S ≤ 0.7 is satisfied.

[0016] Advantageous effects: By setting the ratio of the area “S1” of the support body to the total area “S” of the support element between 0.3 and 0.7, both an effective support effect and smooth venting of the gas are ensured, which improves the safety of the battery.

[0017] In an optional embodiment, a dimension of the support element along the width direction is “b”, and a distance between two projecting sections located on different side sections of the support body along the width direction is “e”, where e ≥ 0.1b is satisfied.

[0018] Advantageous effects: By setting “e” to a value greater than or equal to 0.1b, a sufficient venting area of ​​the venting duct is ensured, which guarantees a gas venting effect.

[0019] In an optional embodiment, the dimension “d” of the side section of the support body along the width direction and the dimension “b” of the support element along the width direction satisfy: 0.1 ≤ d / b ≤ 0.2.

[0020] Advantageous effects: By setting the ratio between “d” and “b” in the range of 0.1 - 0.2, the machining and shaping of the support element is facilitated, its strength is increased, its deformation is prevented and a sufficient venting area is ensured, which guarantees smooth venting of the gas.

[0021] In an optional embodiment, a distance “L” between two adjacent projecting sections on the same side section of the support body is in the range of 50 mm - 200 mm.

[0022] Advantageous effects: By setting the distance “L” between two adjacent projecting sections on the same side section of the support body in the range of 50 mm - 200 mm, both smooth venting of the gas and sufficient support effect by the support element are ensured.

[0023] In an optional embodiment, the thickness of the support element is in the range of 0.5 mm - 5 mm.

[0024] Advantageous effects: By setting the thickness of the support element in the range of 0.5 mm - 5 mm, a sufficient venting area is ensured, which guarantees smooth venting of the gas and also improves the energy density of the battery.

[0025] In an optional embodiment, the projecting sections are designed as a semicircle or polygon.

[0026] Advantageous effects: Both semicircles and polygons can achieve the supporting function of the projecting sections, which also offers more alternatives and makes editing easier.

[0027] In an optional embodiment, the polygon comprises one or more of the following: triangle, rectangle, and trapezoid.

[0028] Advantageous effects: Triangles, rectangles and trapezoids are simple shapes that are easy to manufacture, and the production costs are low.

[0029] According to the second aspect of the present invention, a battery pack is further provided, comprising the battery described above. Since the battery pack comprises the battery described above and has the same effects as the battery described above, no further details are given here.

[0030] Against this background, the present invention provides a battery and a battery pack to solve the problem that the limited venting space between the side surface of the housing and the cells leads to a significant obstacle to gas transport in the battery, which is not conducive to the rapid release of the gas contained in the battery and represents a safety risk.

[0031] According to the third aspect of the present invention, a battery is provided comprising: a housing in which a receiving space is formed; an explosion protection valve provided on a side surface of the housing; a cell located in the receiving space; and a support element provided in the receiving space, wherein the support element is located between the side surface of the housing on which the explosion protection valve is located and the cell; wherein the support element comprises an annular main body and a limiting section, the limiting section being configured to support both sides of an inner ring of the annular main body along a width direction of the annular main body;wherein the annular main body has a plurality of thinned sections which are provided at intervals along a circumferential direction of the annular main body, and the plurality of thinned sections are configured to extend along the width direction of the annular main body.

[0032] Advantageous effects: By providing the support element, which is braced between the side surface of the casing and the cell, a venting space is maintained between the casing and the cell. This reduces resistance to gas transport and facilitates the rapid release of gas contained in the battery, thus ensuring battery safety. Furthermore, the limiting section supports both sides of the annular main body within the main body. This prevents the support element from being compressed and deformed laterally, simplifying assembly of the support element and ensuring effective gas venting through a central opening in the main body.By providing the thinned sections on the annular main body, the annular main body ruptures at the thinned sections when a predetermined pressure is reached inside the battery, allowing gas from the external environment of the support element in the receiving space to flow through the ruptured thinned sections into the central opening of the annular main body and be released through the explosion protection valve, thus improving the efficiency of venting the gas contained in the battery.

[0033] In an optional embodiment, one or a plurality of thinned sections are provided on two long sides and / or two short sides of the annular main body.

[0034] Advantageous effects: This arrangement allows the gas to flow rapidly from the outside of the two long sides and the outside of the two short sides of the annular main body into the central opening of the annular main body within the receiving chamber, which can shorten the gas transport path and thus facilitate the venting of the gas.

[0035] In an optional embodiment, the thinned sections located on the long sides of the annular main body are provided to correspond to the position of the explosion protection valve.

[0036] Advantageous effects: This arrangement shortens the transport path of the gas to the explosion protection valve, which allows for rapid venting of the gas.

[0037] In an optional embodiment, two thinned sections are provided at intervals on the short sides of the annular main body, at a center-to-center distance “d” between two thinned sections and with a width “c” of the central opening of the annular main body, where d≥0.5 * c is satisfied.

[0038] Advantageous effects: If two thinned sections tear, the section of the annular main body between the two thinned sections breaks off, forming an opening on the short sides of the annular main body. This arrangement facilitates the entry of gas from the outside of the short sides of the annular main body into the central opening. Furthermore, by setting d ≥ 0.5 * c, a sufficient width of the opening is ensured, which is also advantageous for the gas to flow into the central opening.

[0039] In an optional embodiment, the thickness of the support element is “h”, and the thickness of the thinned section is “e”, where 0.05*h≤e≤0.2*h is satisfied; and / or two explosion protection valves are provided at intervals, wherein the center-to-center distance between the two explosion protection valves is “y”, and the battery length is “L”, where 1 / 3≤y / L≤1 / 2 is satisfied; and / or the battery length is L≥300 mm, and the battery width is D≤30 mm; and / or the battery length is “L”, and the battery width is “D”, where L / D≥10 is satisfied; and / or the housing width is “B”, and the support element width is “b”, where b≥0.5*B is satisfied; and / or a wall thickness of the side surface of the housing on which the explosion protection valve sits is “g”, where g ≥ 0.95 mm is satisfied; and / or a thickness of the support element is “h”, where 0.5 mm≤h≤2 mm is satisfied.

[0040] Advantageous effects: By specifying 0.05*h≤e≤0.2*h, sufficient strength of the support element is ensured, while allowing the thinned sections to rupture under predetermined pressure. By 1 / 3 <y / L<1 / 2 festgelegt wird, ist sichergestellt, dass Gas an allen Stellen im Aufnahmeraum das Explosionsschutzventil über einen relativ kurzen Transportweg erreichen kann. Indem L≥300 mm, D≤30 mm und / oder L / D≥10 festgelegt werden, ist es möglich, dass das Stützelement mit einer relativ langen Länge und einer relativ kurzen Breite auf eine Batterie angewendet wird, was in einem ringförmigen Hauptkörper mit einer relativ langen Länge und einer relativ kurzen Breite resultiert. Die Mittenposition des ringförmigen Hauptkörpers entlang seiner Längenrichtung neigt dazu, nach innen eingedrückt und verformt zu werden. Daher ist ein begrenzender Abschnitt vorgesehen, um den ringförmigen Hauptkörper zu stützen und ein Verformen des ringförmigen Hauptkörpers zu verhindern.By setting b≥0.5*B, the support element provides effective support between the cell and the housing, effectively reducing the obstacle to gas transport. By setting g≥0.95 mm, the installation strength of the explosion protection valve is ensured. By setting 0.5 mm≤h≤2 mm, sufficient support strength of the support element is ensured while simultaneously preventing the support element from occupying excessive space inside the battery, thus improving the battery's energy density.

[0041] In an optional embodiment, the limiting section comprises a first subsection and a second subsection, a first end of the first subsection being connected to one side of the inner ring of the annular main body, and a first end of the second subsection being connected to the other side of the inner ring of the annular main body. The second end of the first subsection and the second end of the second subsection are positioned close to each other.

[0042] Advantageous effects: The proximity of the first and second subsections ensures the overall support of the limiting section on the annular main body. Due to a gap between the second end of the first subsection and the second end of the second subsection, during the gas venting process, when the gas reaches the predetermined pressure, the first and second subsections can be displaced along their length. This allows the central openings on both sides of the limiting section to connect, enabling effective venting of the gas towards the explosion protection valve.

[0043] In an optional embodiment, the gap between the second end of the first subsection and the second end of the second subsection is less than 0.5 mm.

[0044] Advantageous effects: While ensuring that the first and second sections are movable under predetermined pressure, the supporting effect of the first and second sections on the ring-shaped main body is also guaranteed.

[0045] And / or an angle “α” between the side wall of the first subsection and the inner ring of the annular main body is greater than or equal to 120° and an angle “α” between the side wall of the second subsection and the inner ring of the annular main body is greater than or equal to 120°.

[0046] Advantageous effects: This arrangement prevents turbulence from forming in the gas at the connection between the side wall of the first section and the inner ring of the annular body, as well as at the connection between the side wall of the second section and the inner ring of the annular body, thus ensuring smooth gas transfer.

[0047] And / or the side wall of the first subsection is temporarily connected to the second end of the first subsection via an arc-shaped structure, and the side wall of the second subsection is temporarily connected to the second end of the second subsection via an arc-shaped structure.

[0048] Advantageous effects: This arrangement reduces the obstructive effect of the first and second sections on the gas, allowing the gas to flow smoothly between the central openings located on both sides of the limiting section.

[0049] In an optional embodiment, the support element further comprises a projecting section that is connected to the inner wall of the annular main body and extends towards the central opening of the annular main body.

[0050] Advantageous effects: While the ventilation space of the central opening of the ring-shaped main body is ensured, the support area of ​​the support element between the housing and the cell is increased.

[0051] In an optional embodiment, the total area of ​​the side of the support element facing the explosion protection valve is “S”, and a sum of the areas of the annular main body and the projecting section facing the explosion protection valve is “S1”, where 0.2 ≤ S1 / S ≤ 0.8 is satisfied; and / or a width of the support element is “b”, and a distance between two projecting sections along a width direction of the support element is “f”, where f ≥ 0.25 * b is satisfied.

[0052] Advantageous effects: By setting 0.2 ≤ S1 / S ≤ 0.8, it is ensured that the support element has a sufficient support area while simultaneously allowing the glass to flow smoothly through the central opening. By setting f ≥ 0.25 * b, a smooth gas flow along the longitudinal direction in the central opening is ensured.

[0053] According to the fourth aspect of the present invention, a battery pack is further provided which comprises the battery described above.

[0054] Against this background, the present invention provides a battery and a battery pack to solve the problem that a limited venting space between the side surface of the housing and the electrode arrangement leads to a significant obstacle to gas transport in the battery, hindering the rapid release of gas and posing a safety risk.

[0055] According to the fifth aspect of the present invention, a battery is provided comprising: a housing in which a receiving space is formed; an explosion protection valve provided on a side surface of the housing; an electrode arrangement located in the receiving space; and a support element provided in the receiving space, wherein the support element is located between the side surface of the housing on which the explosion protection valve is located and the electrode arrangement; wherein the support element comprises an annular main body and a limiting section, the limiting section being configured to support both sides of an inner ring of the annular main body along a width direction of the annular main body.

[0056] By providing the support element, which is braced between the side surface of the housing and the electrode assembly, a venting space is maintained between the housing and the electrode assembly. This reduces the obstruction to gas transport and facilitates the rapid release of gas from the battery, thus ensuring battery safety. Furthermore, the limiting section supports both sides of the annular main body within the main body. This prevents the support element from being compressed or deformed laterally, facilitates assembly of the support element, and ensures effective gas venting through the central opening of the annular main body.

[0057] In an optional embodiment, the limiting section comprises a first subsection and a second subsection. A first end of the first subsection is connected to one side of the inner ring of the annular main body, and a first end of the second subsection is connected to the other side of the inner ring of the annular main body. The second end of the first subsection and the second end of the second subsection are positioned close to each other. The proximity of the first and second subsections ensures the overall support effect of the limiting section on the annular main body. Due to a gap existing between the second end of the first subsection and the second end of the second subsection, during the gas venting process, when the gas reaches a predetermined pressure, the first subsection and the second subsection can be displaced.the second section is shifted along the longitudinal direction, which allows the central openings on both sides of the limiting section to connect with each other, enabling effective venting of the gas towards the explosion protection valve.

[0058] In an optional embodiment, the gap between the second end of the first subsection and the second end of the second subsection is less than 0.5 mm. While ensuring that the first and second subsections are displaceable under the predetermined pressure, the supporting effect of the first and second subsections on the annular main body is also guaranteed.

[0059] In an optional embodiment, an angle “α” between the side wall of the first subsection and the inner ring of the annular main body is greater than or equal to 120°, and an angle “α” between the side wall of the second subsection and the inner ring of the annular main body is greater than or equal to 120°. This arrangement prevents turbulence from forming in the gas at the junction between the side wall of the first subsection and the inner ring of the annular body, as well as at the junction between the side wall of the second subsection and the inner ring of the annular body, thus ensuring smooth gas transfer.

[0060] In an optional embodiment, the side wall of the first subsection is temporarily connected to the second end of the first subsection via an arc-shaped structure, and / or the side wall of the second subsection is temporarily connected to the second end of the second subsection via an arc-shaped structure. This arrangement therefore reduces the obstructive effect of the first and second subsections on the gas, allowing the gas to flow smoothly between the central openings located on both sides of the bounding section.

[0061] In an optional embodiment, a limiting section is provided that corresponds to the central position of the annular main body along one of its longitudinal directions. Alternatively, a plurality of limiting sections are provided at intervals along the longitudinal direction of the annular main body. This arrangement ensures both a suitable venting space at the central opening of the annular main body and effective support from the limiting sections.

[0062] In an optional arrangement, the battery length "L" is greater than or equal to 300 mm, and the battery width "D" is less than or equal to 30 mm. Therefore, the support element, with its relatively long length and relatively short width, is applied to the battery, resulting in an annular main body with a relatively long length and relatively short width. The central position of the annular main body along its length tends to be indented and deformed. Therefore, by providing the limiting section, the support element is positioned on the annular main body, preventing deformation of the annular main body.

[0063] In an optional embodiment, the central opening of the annular main body is designed to correspond to the explosion protection valve. Therefore, the gas contained in the battery can directly reach the position of the explosion protection valve after passing through the central opening of the annular main body, thus facilitating the venting of the gas.

[0064] In an optional embodiment, the support element further comprises a projecting section that is connected to the inner wall of the annular main body and extends towards the central opening of the annular main body. This arrangement ensures adequate ventilation space for the central opening of the annular main body, while increasing the support area of ​​the support element between the housing and the electrode assembly.

[0065] According to the sixth aspect of the present invention, a battery pack is provided comprising the battery described above.

[0066] Against this background, the present invention provides a battery and a battery pack to solve the problem that the venting of gas from the interior of existing batteries does not occur quickly.

[0067] According to the seventh aspect of the present invention, a battery is provided comprising: a housing in which a receiving chamber is formed, an explosion protection valve formed on a side surface of the housing, wherein the explosion protection valve is configured to be opened at a first preset pressure value; an electrode arrangement provided in the receiving chamber;and a support element located between the side surface of the housing on which the explosion protection valve is seated and the electrode assembly, the support element being provided with at least one fracture zone, wherein at least one section of the fracture zone is designed as a thinned section, the thickness of the thinned section being less than the thickness of the main body of the support element, the thinned section being configured to fracture at a second preset pressure value in order to connect the receiving chamber and the explosion protection valve, the second preset pressure value being lower than the first preset pressure value.

[0068] Advantageous effects: By providing a support element between the housing and the electrode assembly, located in the housing's receiving chamber, and by configuring one side of the support element to abut the inner wall of the housing's side surface where the explosion protection valve is located, and the other side to abut the electrode assembly, the support element serves to brace the electrode assembly between the housing and the housing, thus ensuring a certain distance between the electrode assembly and the housing. Furthermore, by creating a fracture zone on the support element, the thinned section of the fracture zone ruptures before the explosion protection valve opens, thereby connecting the explosion protection valve to the receiving chamber containing the electrode assembly.This arrangement increases the venting space and allows gas in the receiving chamber to be rapidly released to the location of the explosion protection valve, ensuring that all gas in the battery escapes through the explosion protection valve so quickly that the safety of the battery is guaranteed.

[0069] In an optional embodiment, the thickness of the thinned section is “H1”, and the thickness of the main body of the support element is “H”, where 0.05 ≤ H1 / H ≤ 0.5 is satisfied.

[0070] Advantageous effects: By setting the ratio of the thickness “H1” of the thinned section to the thickness “H” of the support body in the range of 0.05 - 0.5, sufficient strength of the support element is ensured, which prevents deformation of the thinned section, and excessive strength of the thinned section is prevented, which ensures that the thinned section breaks quickly.

[0071] In an optional embodiment, each fracture zone comprises at least two thinned sections arranged at intervals.

[0072] Advantageous effects: By providing at least two thinned sections at intervals, the region between the thinned sections can be completely separated from the support body after their failure, resulting in a larger fracture zone. This arrangement increases the gas flow space, facilitating the flow of gas from the external environment of the support element into the vent channel, thus promoting rapid gas release. Furthermore, the arrangement of at least two intermittently provided thinned sections reduces the size of each thinned section, preventing insufficient strength of the support body due to excessively large individual thinned sections, thereby improving structural stability.

[0073] In an optional embodiment, the support element comprises an annular support body and a vent channel enclosed and formed by the support body. The fracture zone is located on the support body, and the thinned section is connected between an inner and an outer ring of the support body.

[0074] Advantageous effects: The support body supports the electrode assembly and the housing, ensuring a certain distance between the electrode assembly and the housing. Furthermore, the vent channel connects the space containing the electrode assembly to the explosion protection valve, facilitating gas flow within the receiving chamber and increasing the venting area. This allows gas at the electrode assembly location in the receiving chamber to be rapidly released through the vent channel to the explosion protection valve. Additionally, the thinned section breaks before the explosion protection valve opens, creating a gap in the support body that connects the space outside the support element to the vent channel.This arrangement ensures that gas outside the support element can flow rapidly into the vent channel and be released at the location of the explosion protection valve, which ensures that gas at any point in the battery can be rapidly released through the explosion protection valve, thus guaranteeing the safety of the battery.

[0075] In an optional embodiment, the support element has a shape resembling the Chinese character “ "or a form in the manner of interlocking rectangles, and the support body comprises two first side sections located at both ends in the longitudinal direction of the support element, and two second side sections located at both end sections in the lateral direction of the

[0076] support element located.

[0077] Advantageous effects: The structure in the form in the style of the Chinese character “ " is easy to manufacture and can be adapted to the space in the housing.

[0078] In an optional embodiment, each first side section is provided with a fracture zone, wherein the fracture zone comprises two interval-provided thinned sections. A distance between the two thinned sections is “L1”, and a dimension of the vent channel in the width direction is “L”, where 0.2 ≤ L1 / L ≤ 1 is satisfied.

[0079] Advantageous effects: By setting the ratio between the distance “L1” between two thinned sections and the dimension “L” of the vent channel in the width direction in the range of 0.2 - 1, it is ensured that after damage to the thinned sections, the cross-sectional area of ​​a gas-conducting channel formed by the fracture zone is sufficiently large, which ensures that gas located around the support element can flow smoothly into the vent channel.

[0080] In an optional embodiment, the support element comprises an explosion protection zone corresponding to the explosion protection valve, and the fracture zone is provided on the second side section of the explosion protection zone. The fracture zone comprises at least two thinned sections arranged at intervals.

[0081] Advantageous effects: By providing an explosion protection zone on the support element, corresponding to the explosion protection valve, and by providing a fracture zone on the second side section of the explosion protection zone, if the thinned section in the fracture zone breaks, the gas channel formed on the fracture zone can direct the gas directly from the external environment of the support element to the position corresponding to the explosion protection valve, thus reducing the distance over which the gas is directed and thus rapidly releasing the gas from the external environment of the support element, which further improves the safety of the battery.

[0082] In an optional embodiment, a distance between two adjacent thinned sections on the second side section is “L2”, and a dimension of the explosion protection valve along the longitudinal direction of the support element is “L3”, where 0.1 ≤ L2 / L3 ≤ 1.2 is satisfied.

[0083] Advantageous effects: By setting the ratio between the distance “L2” between two adjacent thinned sections on the second side section and the length “L3” of the explosion protection valve in the range of 0.8 - 1.2, both a sufficient venting area after the break and an effective support effect of the electrode arrangement by the support body are ensured.

[0084] In an optional embodiment, the second side section of the support body is provided with a plurality of projecting sections extending in the direction of the vent channel, and the plurality of projecting sections on every second side section are arranged at intervals along the longitudinal direction of the support element.

[0085] Advantageous effects: By providing protruding sections on the second side section, the surface area of ​​the support body is increased, ensuring good support performance. Furthermore, the small dimensions of the protruding sections mean minimal obstruction to the venting channel, allowing the support element to simultaneously fulfill the requirements of providing support and gas venting. This prevents the electrode assembly from being compressed and deformed, while ensuring smooth gas venting.

[0086] According to the eighth aspect of the present invention, a battery pack is further provided, comprising the battery described above. Since the battery pack comprises the battery described above and has the same effects as the battery described above, no further details are given here. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] To more clearly illustrate the embodiments of the present invention or the prior art technical solutions, the drawings used in the description of the specific prior art embodiments are briefly introduced below. Obviously, the drawings described below represent some embodiments of the present invention. It is apparent to those skilled in the art that other drawings can be derived from these without any creative effort. Fig. Figure 1 is a schematic representation of the structure of the battery according to one embodiment of the present invention; Fig. 2 is a front view of the battery, which is in Fig. 1 is shown; Fig. 3 is a sectional view along line “AA” in Fig. 2; Fig. Figure 4 is a partially enlarged schematic representation of section “A” in Fig. 2; Fig. Figure 5 is a structural schematic exploded view of the battery, which is located in Fig. 1 is shown; Fig. Figure 6 is a schematic representation of the electrode arrangement and the support element according to an embodiment of the present invention; Fig. Figure 7 is a schematic representation of the structure of the support element according to an embodiment of the present invention; Fig. Figure 8 is a top view of the support element located in Fig. 7 is shown; Fig. Figure 9 is a partially enlarged schematic representation of section "B" in Fig. 8; Fig. Figure 10 is a partially enlarged schematic representation of section “C” in Fig. 8; Fig. Figure 11 is a schematic representation of the housing and the explosion protection valve according to an embodiment of the present invention; Fig. Figure 12 is a schematic representation of the insulating protective layer according to an embodiment of the present application; Fig. 13 is a schematic representation of an overall structure of the battery according to an embodiment of the present invention; Fig. 14 is a schematic representation of the structure of the battery as an exploded view according to an embodiment of the present invention; Fig. Figure 15 is a schematic representation of the structure of the housing and the explosion protection valve according to an embodiment of the present invention; Fig. 16 is a top view of the battery, which is located in Fig. 13 is shown; Fig. Figure 17 is a schematic representation of the structure of the cell and the support element according to an embodiment of the present invention; Fig. Figure 18 is a schematic representation of the structure of the support element according to an embodiment of the present invention; Fig. 19 is a schematic representation of the front view of Fig. 17; Fig. Figure 20 is a schematic representation of the partial structure of a part of the support element according to an embodiment of the present invention; Fig. Figure 21 is a schematic representation of the partial structure of a further part of the support element according to an embodiment of the present invention; Fig. Figure 22 is a schematic representation of the structure in a sectional view along the line "BB" in Fig. 19; Fig. Figure 23 is a schematic representation of the partial structure of the limiting section according to an embodiment of the present invention; Fig. Figure 24 is a schematic representation of the structure in a sectional view along the line "AA" in Fig. 16; Fig. Figure 25 is a schematic representation of the structure of the battery as an exploded view according to an embodiment of the present invention; Fig. Figure 26 is a schematic representation of the structure of the electrode arrangement and the support element according to an embodiment of the present invention; Fig. Figure 27 is a schematic representation of the structure of the support element according to an embodiment of the present invention; Fig. 28 is a schematic representation of the front view of Fig. 27; Fig. Figure 29 is a schematic representation of the partial structure of the limiting section according to an embodiment of the present invention; Fig. 30 is a sectional view along line “AA” in Fig. 2; Fig. 31 is a structural exploded view of the battery, which is in Fig. 1 is shown; Fig. Figure 32 is a structural representation of the electrode arrangement and the support element according to an embodiment of the present invention; Fig. 33 is a structural representation of the support element according to an embodiment of the present invention; Fig. Figure 34 is a top view of the support element located in Fig. 33 is shown; Fig. Figure 35 is a partially enlarged schematic representation of section "B" in Fig. 34; Fig. Figure 36 is a partially enlarged schematic representation of the explosion protection zone in Fig. 34; Fig. Figure 37 is a partially enlarged schematic representation of section “C” in Fig. 34; Fig. Figure 38 is a side view of the support element located in Fig. 33 is shown; Fig. Figure 39 is a schematic representation of the structure of the housing and the explosion protection valve according to an embodiment of the present invention. Reference symbol:

[0088] 1. Housing; 101. Explosion protection valve; 102. Jacket; 103. Cover plate; 104. Insulating protective layer; 2. Electrode assembly; 3. Support element; 301. Support body; 3011. Projecting section; 302. Vent duct; 303. Bounding section; 3031. First bounding section; 3032. Second bounding section. 11. Housing; 1101. Receiving chamber; 1102. Jacket; 1103. Cover plate; 1104. Insulating protective layer; 12. Explosion protection valve; 13. Cell; 14. Support element; 1401. Annular main body; 14011. Thinned zone; 14012. Central opening; 1402. Bounding section; 14021. First subsection; 14022. Second subsection; 1403. Projecting section. 2102. Housing; 2103. Cover plate; 2104. Insulating layer; 22. Explosion protection valve; 23. Electrode assembly; 24. Support element; 2401. Annular main body; 24011. Central opening; 2402. Bounding section; 24021. First subsection; 24022. Second subsection; 2403. Projecting section. 3101, Explosion protection valve; 3102, Jacket; 3103, Cover plate; 3104, Insulating protective layer; 32, Electrode assembly; 33, Support element; 3301, Support body; 33011, First side section; 33012, Second side section; 33013, Projecting section; 3302, Venting channel; 3303, Fracture zone; 33031, Thinned section; 3304, Explosion protection corresponding zone; 3305, Limiting section; 33051, First limiting section; 33052, Second limiting section. DETAILED DESCRIPTION OF THE EXECUTION FORMS

[0089] To clarify the tasks, technical solutions, and advantages of the embodiments of the present invention, the technical solutions of the embodiments of the present invention are described clearly and completely below with reference to the accompanying drawings. It is evident that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments that skilled persons achieve without creative effort fall within the scope of protection of the present invention.

[0090] The embodiments of the present invention are described below with reference to the Fig. 1 to 12 described.

[0091] According to one embodiment of the present invention, a battery is provided comprising: a housing 1, an electrode assembly 2, and a support element 3. In particular, a receiving chamber is formed in the housing 1, an explosion protection valve 101 is provided on a side surface of the housing 1, and the explosion protection valve 101 is configured to open at a preset pressure value. The electrode assembly 2 is provided in the cavity; the support element 3 is provided between the side surface of the housing 1, on which the explosion protection valve 101 is located, and the electrode assembly 2. The support element 3 comprises a support body 302, which has an annular shape, and a vent channel 302, which is enclosed and formed by the support body 301, the vent channel 302 being configured to cover the explosion protection valve 101.A plurality of projecting sections 301, extending in the direction of the vent channel 302, are provided on two side sections of the support body 301 along a width direction of the support body 301, and the plurality of projecting sections 3011 on the same side section are arranged at intervals along a length direction of the support element 3.

[0092] In the battery of the present embodiment, the support element 3 is located within the receiving chamber of the housing 1 by being positioned between the housing 1 and the electrode assembly 2. One side of the support element 3 abuts the inner wall of the side surface of the housing 1, where the explosion protection valve 101 is located, and the other side abuts the electrode assembly 2. This arrangement provides support between the electrode assembly 2 and the housing 1, ensuring a certain distance between the electrode assembly 2 and the housing 1. Meanwhile, the vent channel 302 connects the space containing the electrode assembly 2 to the explosion protection valve 101, which facilitates gas flow within the receiving chamber, increases the venting area, and ensures that gas in the receiving chamber is rapidly released to the location of the explosion protection valve 101.This ensures that the explosion protection valve 101 opens immediately at the preset pressure value, thus guaranteeing battery safety. Furthermore, the provision of projecting sections 3011 on the support body 301 increases its surface area, ensuring good support performance for the support element 3. The dimensions of the projecting sections 3011 are relatively small compared to those of the support element 3, minimizing obstruction to gas venting through the vent channel 302. In this way, the support element 3 simultaneously fulfills the requirements of providing support and gas venting, preventing the electrode assembly 2 from being compressed and deformed while ensuring smooth gas venting.

[0093] It should be noted that the side surface of housing 1 refers to the surface extending along the "longitudinal direction" indicated by the arrow in Fig. 1 is indicated, preferably one of the narrower side faces. The preset pressure value is a predetermined value. When the gas pressure in the battery reaches the preset pressure value, the explosion protection valve 101 opens to prevent the battery from exploding due to excessive internal gas pressure. If the gas pressure in the battery is too high, the gas in the receiving chamber flows through the vent channel 302 on the support element 3 to the explosion protection valve 101. The explosion protection valve 101 bursts due to the high-pressure gas, and the gas in the battery can be released through the open explosion protection valve 101. The lateral direction refers to the "lateral direction" indicated in Fig. 8 is indicated by the arrow. The direction of length refers to the "direction of length" shown in the Fig. 1 and Fig. 8 is indicated by the arrows.

[0094] In particular, the shape of the support element 3 is adapted to the side surface of the housing 1 on which the explosion protection valve 101 is located. The support element 3 is in a shape resembling the Chinese character “ "produced, which can be formed by stamping, resulting in a cost-effective and uncomplicated form of production.

[0095] In particular, one or a multitude of explosion protection valves 101 can be provided. The specific number of explosion protection valves 101 can be determined according to the design-specific requirements.

[0096] In one embodiment, the housing 1 is a closed structure that encloses and forms a receiving chamber. In particular, the housing 1 comprises a jacket 102 and a cover plate 103. The jacket 102 has openings at both ends, and two cover plates 103 are provided, each closing an opening at one end of the jacket 102. The cover plates 103 are electrically connected to the electrode arrangement 2.

[0097] Furthermore, in other embodiments, the sheath 102 has an opening at one end and is closed at the other end, and a cover plate 103 is provided to close the opening at one end of the sheath 102.

[0098] In one embodiment, further referring to Fig. 5. The housing 1 further comprises an insulating layer 104, which is provided between the inner surface of the jacket 102 and the electrode assembly 2 to insulate the electrode assembly 2 from the jacket 102. In particular, the insulating layer 104 is provided on the outside of the support element 3, that is, the support element 3 is provided between the insulating layer 104 and the electrode assembly 2. When the battery needs to be vented, it is under high temperature and high pressure. In this case, the venting of the gas is not affected by the placement of the insulating layer 104.

[0099] In an optional embodiment, the projecting sections 3011, located on different side sections, are arranged in an offset configuration. It should be noted that "different side sections" refers to the two side sections that are arranged opposite each other along the width direction of the support element 3. By offsetting the projecting sections 3011 on the opposite side sections, the projecting sections 3011 are not directly opposite each other, resulting in a more sufficient venting space, less obstruction of the gas flow, and smoother gas venting.In comparison to a structure where the two projecting sections 3011 are directly opposite each other, the offset arrangement of the projecting sections 3011 allows the dimension of the projecting sections 3011 in the lateral direction to be appropriately increased without compromising the smooth venting of the gas. Furthermore, this arrangement also increases the support area, enabling the support element 3 to provide more effective support for the electrode arrangement 2.

[0100] In one embodiment, the total area of ​​the support element 3 is “S” and the area of ​​the support body 301 is “S1”, where 0.3 ≤ S1 / S ≤ 0.7 is satisfied. It should be noted that the total area “S” of the support element 3 refers to the sum of the area of ​​the support body 301 and the area of ​​the vent channel 302. The support body 301 is supported between the electrode assembly 2 and the sheath 102. If the area “S1” of the support body 301 is less than 0.3S, the area of ​​the support body 301 will be insufficient to effectively support the electrode assembly 2. This could pose a risk of the electrode assembly 2 deforming and sagging towards the side surface where the explosion protection valve 101 is located, thus blocking the vent channel 302 and preventing rapid venting of the gas.If the area “S1” of the support body 301 is greater than 0.7S, the support element 3 can effectively support the electrode arrangement 2; however, the area of ​​the vent channel 302 decreases, resulting in insufficient venting space and increased resistance to gas venting, which poses a safety risk. Therefore, the ratio of the area “S1” of the support body 301 to the total area “S” of the support element 3 is set between 0.3 and 0.7. This arrangement ensures that the support body 301 provides effective support while simultaneously ensuring smooth gas venting, thus improving battery safety. Preferably, the area “S1” of the support body 301 is S1 = 0.5S.

[0101] In one embodiment, the dimension of the support element 3 along its width direction is “b”, and the distance between the two projecting sections 3011, which are located on different side sections of the support body 301 along the width direction, is “e”, where e ≥ 0.1b. Furthermore, with reference to the Fig. 8 and Fig. 9. The latitude direction refers to the "latitude direction" indicated by the arrows in the Fig. 8 and Fig. Figure 9 is shown. The distance “e” along the width direction between the projecting sections 3011 on the two opposite side sections of the support body 301 along the width direction is the minimum dimension of the vent channel 302 along the width direction. The value of “e” directly affects the venting effect of the vent channel 302. If “e” is less than 0.1b, the area of ​​the vent channel 302 is too small, the venting space is insufficient, the resistance to gas release is high, and the gas cannot escape in time, which poses a safety risk. Therefore, setting “e” to a value greater than or equal to 0.1b ensures that the vent channel 302 has a sufficient venting area, thus ensuring the venting effect. Preferably, e = 0.35b.

[0102] In one embodiment, the dimension “d” of the side section of the support body 301 along the width direction and the dimension “b” of the support element 3 along the width direction satisfy: 0.1 ≤ d / b ≤ 0.2. Furthermore, with reference to the Fig. 8 and Fig. 9. If the ratio of dimension “d” of the side section of the support body 301 along the width direction to dimension “b” of the support element 3 along the width direction is less than 0.1b, the side section of the support body 301 is too small, causing difficulties in manufacturing the support element 3 and making it susceptible to indentation and deformation. If the ratio of “d” to “b” is greater than 0.2b, the side section of the support body 301 is too large, correspondingly reducing the area of ​​the vent channel 302, resulting in an insufficient venting area and preventing rapid gas escape, thus posing a safety risk.Therefore, by setting the ratio between "d" and "b" in the range of 0.1 - 0.2, the machining and shaping of the support element 3 is facilitated, the strength of the support element 3 is increased, its deformation is prevented, and a sufficient venting area is ensured to guarantee smooth venting. Preferably d = 0.15b.

[0103] In one embodiment, the distance “L” between two adjacent projecting sections 3011 on the same side section of the support body 301 is between 50 mm and 200 mm. Furthermore, with reference to the Fig. 8 and Fig. 9. “The same side section” refers to any one of the two side sections of the support body 301 along its width direction. A plurality of projecting sections 3011 on the same side section are arranged at intervals. If the distance “L” between two adjacent projecting sections 3011 is less than 50 mm, the number of projecting sections 3011 on the support body 301 is too high, resulting in an excessive density of projecting sections 3011. This would unduly restrict the area of ​​the vent channel 302, reducing its area and affecting the smooth venting of the gas. Furthermore, the weight of the support body 301 would increase accordingly, resulting in a lower energy density of the battery. If the distance “L” between two adjacent projecting sections 3011 is greater than 200 mm, the number of projecting sections 3011 on the support body 301 is too small.This results in an insufficient contact area of ​​the support body 301 with the electrode arrangement 2, meaning that there is no effective support for the electrode arrangement 2. This could cause the electrode arrangement 2 to deform and sag towards the side surface where the explosion protection valve 101 is located, blocking the vent channel 302 and preventing rapid gas venting. Therefore, the distance “L” between two adjacent projecting sections 3011 on the same side section of the support body 301 is set in a range between 50 mm and 200 mm. This arrangement ensures both smooth gas venting and sufficient support for the support element 3. Preferably, the distance “L” between two adjacent projecting sections 3011 on the same side section of the support body 301 is 120 mm.

[0104] In one embodiment, the thickness of the support element 3 is in the range of 0.5 mm to 5 mm. It should be noted that the thickness of the support element 3 refers to the dimension of the support element 3 along the "vertical direction" indicated by the arrow in Fig. 5 is shown. The thickness of the support element 3 determines the distance between the electrode assembly 2 and the sheath 102, which directly affects the size of the venting space. If the thickness of the support element 3 is less than 0.5 mm, it is too thin, resulting in insufficient space between the electrode assembly 2 and the sheath 102 along the vertical direction. This leads to an inadequate venting space in the vent channel 302, resulting in increased resistance to gas venting and preventing rapid gas evacuation, which poses a safety risk. If the thickness of the support element 3 is greater than 5 mm, it is too thick, occupying too much space in the sheath 102. This reduces the height of the electrode assembly 2, decreases the battery's energy capacity, and hinders improvements in battery performance.Therefore, by setting the thickness of the support element 3 in the range of 0.5 mm - 5 mm, a sufficient venting area is ensured, which guarantees smooth venting of the gas and also improves the energy density of the battery.

[0105] In one embodiment, the projecting sections 3011 are designed as a semicircle or polygon. Both semicircles and polygons can fulfill the supporting function of the projecting section, offering a wide range of possibilities and simple manufacturing.

[0106] In one embodiment, the polygon comprises one or more triangles, rectangles, and trapezoids, and the projecting section 3011 is configured as one or more triangles, rectangles, and trapezoids. The aforementioned shape structure is simple, straightforward to manufacture, and can be produced at low cost. In particular, when the projecting section 3011 is configured as one or more triangles, rectangles, and trapezoids, the corners of the shape are designed as smoothly intersecting arcs to reduce stress and improve stability. It is understood that the shape of the projecting section 3011 can also be configured as polygons other than triangles, rectangles, and trapezoids.

[0107] In one embodiment, the support body 301 further comprises at least one limiting section 303, which is supported between two side sections of the support body 301 along the width direction of the support body 301. By providing the limiting section 303, the two side sections of the support body 301 are supported within the support body 301, which prevents the support element 3 from being pressed in or deformed in the width direction. This increases the overall strength of the support element 3, facilitates the assembly of the support element 3, and ensures the gas venting effect of the vent channel 302. It should be noted that the limiting section 303 is formed integrally with the support body 301, which can be achieved by stamping or injection molding. At least one limiting section 303 divides the vent channel 302 into at least two regions, each region corresponding to at least one explosion protection valve 101.The limiting section 303 will not obstruct the explosion protection valve 101, thus preventing the opening of the explosion protection valve 101 from being affected.

[0108] In particular, the limiting section 303 comprises a first limiting section 3031 and a second limiting section 3032. The first end of the first limiting section 3031 is connected to one side of the inner ring of the support body 301, and the first end of the second limiting section 3032 is connected to the other side of the inner ring of the support body 301. The second end of the first limiting section 3031 and the second end of the second limiting section 3032 are arranged close to each other. By arranging the first limiting section 3031 and the second limiting section 3032 close to each other, the overall support effect of the limiting section 303 on the support body 301 is ensured.

[0109] According to another aspect of the embodiment of the present invention, a battery pack is further provided which comprises the battery described above.

[0110] The embodiments of the present invention are described below with reference to the Fig. 13 to 24 described.

[0111] According to one aspect of an embodiment of the present invention, a battery is provided comprising a housing 11, an explosion protection valve 12, a cell 13, and a support element 14. A receiving chamber 1101 is formed in the housing 11. The explosion protection valve 12 is provided on a side surface of the housing 11, and the cell 13 is provided in the receiving chamber 1101. The support element 14 is arranged in the receiving chamber 1101 and is located between the side surface of the housing 11, on which the explosion protection valve 12 is located, and the cell 13. The support element 14 comprises an annular main body 1401 and a limiting section 1402, and the limiting section 1402 supports both sides of the inner ring of the annular main body 1401 along the width direction of the annular main body 1401.A large number of thinned zones 14011 are provided on the annular main body 1401, which are provided at intervals circumferentially along the annular main body 1401 and extend along the width direction of the annular main body 1401.

[0112] By providing the support element 14, which is supported between the side surface of the housing 11 and the cell 13, a venting space is maintained between the housing 11 and the cell 13. This reduces resistance to the gas flow and facilitates the rapid release of the gas contained in the battery, thus ensuring battery safety. Furthermore, by providing a limiting section 1402, both sides of the annular main body 1401 are supported within the annular main body 1401. This prevents the support element 14 from being compressed and deformed in the lateral direction, which facilitates the assembly of the support element 14 and ensures effective gas venting through the central opening 14012 of the annular main body 1401.By providing thinned zones 14011 on the annular main body 1401, the annular main body 1401 ruptures at the thinned zones 14011 when the battery reaches a predetermined pressure, which makes it possible for gas from the external environment of the support element 14 in the receiving space 1101 to flow through the ruptured thinned zones 14011 into the central opening 14012 of the annular main body 1401 and be released through the explosion protection valve 12, thus improving the efficiency of gas venting in the battery.

[0113] It should be noted that the thinned zones 14011 provided on the annular main body 1401 refer to the reduced thickness at a predetermined position on the annular main body 1401, thereby forming the thinned zones 14011.

[0114] It should be noted that the gas contained in the battery passes through the central opening 14012 of the annular main body 1401 and is released through the explosion protection valve 12.

[0115] It should be noted that in the case of a battery with a relatively long length and relatively narrow width, such as a blade battery, the support element 14 is designed to conform to the side surface of the battery, resulting in the support element 14 also having a structure with a relatively long length and relatively narrow width. If the support element 14 is manufactured by injection molding, this is not only expensive but also requires segmented injection molding due to process limitations, which makes assembly significantly more difficult. Therefore, the support element 14 can be shaped in the manner of the Chinese character " "(i.e., a ring-shaped structure) can be stamped, which is cost-effective and easy to produce. However, because the support element 14 is relatively long, the central part of the support element 14 becomes concave in the longitudinal direction, which complicates the assembly of the support element 14. Therefore, in the present embodiment, the limiting section 1402 can support the ring-shaped main body 1401 and prevent deformation.

[0116] In one embodiment as described in the Fig. As shown in Figures 18 to 21, the multiple rarefed zones 14011 are provided on both the two long sides and the two short sides of the annular main body 1401. This arrangement allows the gas in the receiving chamber 1101, which corresponds to the outer surfaces of the two long sides and the two short sides of the annular main body 1401, to flow rapidly into the central opening 14012 of the annular main body 1401, thus shortening the gas transport path and facilitating gas venting. That is, if the rarefed zones 14011 rupture, all the gas surrounding cell 13 can flow into the central opening 14012 of the annular main body 1401.

[0117] In one embodiment as in Fig. As shown in Figure 19, the diluted zones 14011, located on the long side of the annular main body 1401, are positioned at locations corresponding to the explosion protection valve 12. This arrangement shortens the gas transport path to the explosion protection valve 12, enabling rapid venting of the gas.

[0118] In one embodiment as described in the Fig. 20 and Fig. As shown in Figure 22, two thinned zones 14011 are provided at intervals on the short side of the annular main body 1401. The center-to-center distance between the two thinned zones 14011 is "d", and the width of the central opening 14012 of the annular main body 1401 is "c", where d ≥ 0.5 * c is satisfied. When the two thinned zones 14011 rupture, the section of the annular main body 1401 located between the two thinned zones 14011 breaks, forming an opening on the short side of the annular main body 1401. This arrangement facilitates the entry of gas from the outside of the short side of the annular main body 1401 into the central opening 14012. Furthermore, by setting d≥0.5 * c, the width of the opening is ensured, which also facilitates the flow of gas into the central opening 14012.

[0119] In one embodiment as in Fig. As shown in Figure 22, the thickness of the support element 14 is “h” and the thickness of the thinned zone 14011 is “e”, where 0.05 * h ≤ e ≤ 0.2 * h is satisfied. By specifying 0.05*h ≤ e ≤ 0.2*h, sufficient strength for the support element 14 is ensured, while allowing the thinned zones 14011 to rupture under predetermined pressure. In particular, if e < 0.05*h, the thinned zones 14011 become too thin, making them difficult to fabricate on the annular main body 1401, resulting in lower yield and high production costs for the support element 14. Furthermore, excessively thin dilute zones 14011 lead to insufficient overall structural strength of the support element 14, making it susceptible to deformation at the dilute zones 14011 and hindering the feeding process. If e > 0.2*h, the dilute zones 14011 become too thick, resulting in excessive resistance.This prevents the thinned zones 14011 from rupturing under the predetermined pressure, which would lead to structural failures.

[0120] It should be noted that the explosion protection valve 12 can be opened when the gas pressure reaches a first preset pressure “P1”, and the diluted zones 14011 can rupture when the gas pressure reaches a second preset pressure “P2”, where “P2” is lower than “P1”.

[0121] In one embodiment as in Fig. As shown in Figure 13, the battery length L ≥ 300 mm and the battery width D ≤ 30 mm. The battery length is “L” and the battery width is “D” where L / D ≥ 10 is satisfied. Thus, it is possible for the support element 14, with a relatively long length and a relatively short width, to be applied to a battery, resulting in an annular main body 1401 with a relatively long length and a relatively short width. The central position of the annular main body 1401 along its length tends to be indented and deformed. Therefore, by providing the limiting section 1402, support can be provided for the annular main body 1401 to prevent deformation of the annular main body 1401.

[0122] In one embodiment as in Fig. As shown in Figure 24, the width of the housing 11 is “B” and the width of the support element 14 is “b”, where b ≥ 0.5 * B. By setting b ≥ 0.5 * B, it is possible for the support element 14 to provide effective support between the cell 13 and the housing 11, thereby effectively reducing resistance to the gas flow. In particular, if b < 0.5 * B, the effective support area of ​​the support element 14 for the cell 13 is insufficient, leading to unstable support of the cell 13, which causes the electrode to tilt or slip. Furthermore, the smaller the width “b” of the support element 14, the greater the pressure at the contact point between the cell 13 and the support element 14, assuming a constant weight of the cell 13. This makes deformation more likely, potentially causing the slurry to detach from the positive and negative electrodes in cell 13, which impairs the capacity and safety of cell 13.Furthermore, if b < 0.5 * B, even if the space between the two sides of the support element 14 and the inner wall of the housing 11 can be used for gas transport, the area of ​​the central opening 14012 of the support element 14 decreases significantly. This presents an excessive obstacle when gas escapes through the central opening 14012 of the support element 14, thereby reducing the amount of gas released per unit time and preventing smooth gas venting.

[0123] In one embodiment as in Fig. As shown in Figure 24, the wall thickness of the side surface of the housing 11, on which the explosion protection valve 12 is mounted, is “g”, where g ≥ 0.95 mm. To ensure the installation strength of the explosion protection valve 12, the wall thickness “g” should be ≥ 0.95 mm. It should be noted that the specific value of the wall thickness “g” is determined by the capabilities of common welding processes. Specifically, the typical weld thickness of the explosion protection valve 12 in related technologies is 0.5 mm. If the wall thickness g < 0.95 mm, the mounting hole of the explosion protection valve 12 is prone to deformation during machining, resulting in a low yield. Furthermore, this places high demands on the machining process and the service life of the cutting tools or molds, leading to high machining costs.Furthermore, a high penetration depth is required between the explosion protection valve 12 and the housing 11, with laser welding allowing for a greater tolerance in terms of penetration depth. If the wall thickness "g" is too small, burn-through or a weak weld joint can easily occur, affecting the airtightness of the welded area.

[0124] It should be noted, with reference to Fig. 24, that the wall thickness of the surface of the housing 11 without the explosion protection valve 12 is “s”, where s < g is satisfied.

[0125] In one embodiment as in Fig. As shown in Figure 24, the thickness of the support element 14 is "h", where 0.5 mm ≤ h ≤ 2 mm is satisfied. By specifying 0.5 mm ≤ h ≤ 2 mm, sufficient support strength of the support element 14 is ensured while simultaneously preventing the support element 14 from occupying excessive space within the battery, thus improving the battery's energy density. Specifically, when h < 0.5 mm, the central opening 14012 of the support element 14 does not have sufficient vertical space, resulting in a small cross-sectional area along both the width and height directions. This leads to increased resistance to gas venting, reducing the amount of gas released per unit time and increasing the risk of cell 13 "bursting" due to gas expansion.If h > 2 mm and a fixed internal receiving space 1101 is given in the housing 11, then the larger the proportion of the receiving space 1101 occupied by the support element 14 in the vertical direction, the smaller the height of the cell 13, which consequently reduces the energy of a single cell 13 and lowers the energy density of the battery.

[0126] In one embodiment as in Fig. As shown in Figure 23, the limiting section 1402 comprises a first subsection 14021 and a second subsection 14022. The first end of the first subsection 14021 is connected to one side of the inner ring of the annular main body 1401, and the first end of the second subsection 14022 is connected to the other side of the inner ring of the annular main body 1401. The second ends of the first subsection 14021 and the second end of the second subsection 14022 are positioned close to each other. This proximity of the first subsection 14021 and the second subsection 14022 ensures the overall support effect of the limiting section 1402 on the annular main body 1401. There is a gap between the second end of the first subsection 14021 and the second end of the second subsection 14022. During the gas venting process, when the gas reaches a predetermined pressure, the first subsection 14021 and the second subsection 14022 can be opened.the second subsection 14022 is moved along the longitudinal direction, thereby connecting the central openings 14012 on both sides of the limiting section 1402, making it possible to effectively release gas to the explosion protection valve 12.

[0127] It should be noted that if the pressure of the gas flowing into the central opening 14012 of the annular main body 1401 is relatively high, the gas exerts force on the first subsection 14021 and the second subsection 14022, causing the first subsection 14021 and the second subsection 14022 to shift along their length. This increases the distance between the first subsection 14021 and the second subsection 14022, thereby connecting the central openings 14012 on both sides of the bounding section 1402.

[0128] It should be noted that the explosion protection valve 12 can be opened when the gas pressure reaches a first preset pressure “P1”, and the first subsection 14021 and the second subsection 14022 can be moved when the gas pressure reaches a third preset pressure “P3”, where “P3” is lower than “P1”.

[0129] In one embodiment, the gap between the second end of the first subsection 14021 and the second end of the second subsection 14022 is less than 0.5 mm. This arrangement ensures that the first subsection 14021 and the second subsection 14022 are displaceable under a predetermined pressure, while also guaranteeing the supporting effect of the first subsection 14021 and the second subsection 14022 on the annular main body 1401.

[0130] It should be noted that if the distance between the first subsection 14021 and the second subsection 14022 is too large, no effective support effect on both sides of the annular main body 1401 is possible, which leads to a significant deformation of the annular main body 1401.

[0131] In one embodiment as in Fig. As shown in Figure 23, the angle “α” between the side wall of the first subsection 14021 and the inner ring of the annular main body 1401 is greater than or equal to 120°, and the angle “α” between the side wall of the second subsection 14022 and the inner ring of the annular main body 1401 is greater than or equal to 120°. This arrangement prevents turbulence from forming at the connection between the side wall of the first subsection 14021 and the inner ring of the annular body 1401, as well as at the connection between the side wall of the second subsection 14022 and the inner ring of the annular body 1401, thus ensuring smooth gas transfer.

[0132] It should be noted that with regard to the Fig. 19 and Fig. 23, if the angle “α” is less than 120° and gas flows into the right central opening 14012 from the left central opening 14012 or flows into the left central opening 14012 from the right central opening 14012, the limiting sections 1402 (the first subsection 14021 and the second subsection 14022) significantly impede the gas flow, causing turbulence to form at the angles, which affects the gas circulation.

[0133] In one embodiment as in Fig. As shown in Figure 23, the side wall of the first subsection 14021 is temporarily connected to the second end of the first subsection 14021 via an arc-shaped structure, and the side wall of the second subsection 14022 is temporarily connected to the second end of the second subsection 14022 via an arc-shaped structure. This arrangement reduces the obstructive effect of the first subsection 14021 and the second subsection 14022 on the gas, allowing the gas to flow smoothly between the central openings 14012 located on both sides of the bounding section 1402.

[0134] In one embodiment as described in the Fig. 18 and Fig. As shown in Figure 19, a limiting section 1402 is provided, which is located at the central position along the longitudinal direction of the annular main body 1401. That is, a first subsection 14021 and a second subsection 14022 are each provided, with the first subsection 14021 being located at the central position of one side of the inner ring of the annular main body 1401 and the second subsection 14022 being located at the central position of the other side of the inner ring of the annular main body 1401, which makes it possible for the first subsection 14021 and the second subsection 14022 to be located opposite each other.

[0135] It is understood that in alternative embodiments, a plurality of limiting sections 1402 may be provided at intervals along the longitudinal direction of the annular main body 1401. This arrangement ensures the supporting effect of the limiting section 1402 on the annular main body 1401, while guaranteeing the ventilation space of the central opening 14012 of the annular main body 1401.

[0136] It should be noted that one or a multitude of limiting sections 1402 are provided which correspond to the weak points of the annular main body 1401, thereby providing a supporting role.

[0137] In one embodiment, referring to the Fig. 19 and Fig. 23, the first subsection 14021 and the second subsection 14022 are provided symmetrically along the transverse centerline of the ring-shaped main body 1401.

[0138] In one embodiment, referring to the Fig. 13 to 19, the central opening 14012 of the annular main body 1401 is designed to correspond to the explosion protection valve 12. Therefore, the gas in the battery can directly reach the explosion protection valve 12 after passing through the central opening 14012 of the annular main body 1401, which facilitates the venting of the gas.

[0139] In one embodiment as described in the Fig. As shown in Figures 18 to 21, the support element 14 further comprises a projecting section 1403 which is connected to the inner wall of the annular main body 1401 and extends towards the central opening 14012 of the annular main body 1401. This arrangement ensures adequate ventilation space for the central opening 14012 of the annular main body 1401, while increasing the support area of ​​the support element 14 between the housing 11 and the cell 13.

[0140] It should be noted that if the support area of ​​the support element 14 is too small, the support force of the support element 14 will be insufficient, and a stable venting space between the housing 11 and the cell 13 cannot be guaranteed. However, if the support area of ​​the support element 14 is increased, i.e., if the ring width of the annular main body 1401 is increased, the total area of ​​the central opening 14012 decreases, which is not conducive to gas venting. Therefore, in the present embodiment, a plurality of projecting sections 1403 are provided successively at intervals along the longitudinal direction of the inner ring of the annular main body 1401 to increase the support area. Furthermore, the total area of ​​the central opening 14012 is not reduced, which ensures the venting effect. Furthermore, with reference to Fig. 19, a plurality of projecting sections 1403 located on one side of the inner ring of the annular main body 1401 are arranged offset from a plurality of projecting sections 1403 located on the other side of the inner ring of the annular main body 1401, thereby preventing obstruction of the gas by two projecting sections 1403 arranged opposite each other.

[0141] It should be noted that the shape of the projecting sections 1403 can be semicircular, rectangular, trapezoidal, triangular, etc.

[0142] In one embodiment, the total area of ​​the side of the support element 14 facing the explosion protection valve 12 is “S”, and the sum of the areas of the sides of the annular main body 1401 and the projecting sections 1403 facing the explosion protection valve 12 is “S1”, satisfying 0.2 ≤ S1 / S ≤ 0.8. By specifying 0.2 ≤ S1 / S ≤ 0.8, it is ensured that the support element 14 has a sufficient support area while simultaneously allowing the glass to flow smoothly through the central opening 14012. Specifically, “S” represents the total area of ​​the large surface of the support element 14, including the area occupied by the central opening 14012. “S1” represents the effective support area of ​​the support element 14, that is, the area that can support the space between the housing 11 and the cell 13.If S1 / S < 0.2, the effective support area becomes too small, resulting in unstable support for cell 13, which can cause the electrodes to tilt or slip. If S1 / S > 0.8, the area of ​​the central opening 14012 becomes too small, hindering smooth gas flow.

[0143] In one embodiment as in Fig. As shown in Figure 21, the width of the support element 14 is “b”, and the distance between the two projecting sections 1403 along the width direction of the support element 14 is “f”, where f ≥ 0.25 * b is satisfied. By setting f ≥ 0.25 * b, a smooth gas flow along the length direction in the central opening 14012 is ensured.

[0144] In one embodiment as in Fig. As shown in Figure 16, two explosion protection valves 12 are provided at intervals, with a center-to-center distance “y” between the two explosion protection valves 12, and the length of the battery is “L”, where 1 / 3 ≤ y / L ≤ 1 / 2 is satisfied. This arrangement ensures that gas can reach the explosion protection valve 12 at all points in the receiving chamber 1101 via a shorter transport path.

[0145] It should be noted that the two explosion protection valves 12 are provided such that they each correspond to the two central openings 14012 which are arranged on both sides of the limiting section 1402.

[0146] It is understood that alternative embodiments may provide a different number of explosion protection valves 12, for example one, two, three, four, etc. The number of explosion protection valves 12 can be specifically selected based on the design-specific requirements.

[0147] It should be noted that if one or a plurality of explosion protection valves 12 are provided, the diluted zone 14011, which is located on the long side of the annular main body 1401, must be provided according to the position of the explosion protection valve 12.

[0148] In one embodiment as in Fig. As shown in Figure 13, the housing 11 is a closed structure that encloses and forms the receiving chamber 1101. Specifically, the housing 11 comprises a jacket 1102 and a cover plate 1103. The jacket 1102 has openings at both ends. Two cover plates 1103 are provided, each configured to close one of the openings at one end of the jacket 1102.

[0149] In other alternative embodiments, the sheath 1102 has an opening at one end and is closed at the other end. A cover plate 1103 is provided which is configured to close the opening at one end of the sheath 1102.

[0150] It should be noted that the cover plate 1103 is electrically connected to cell 13.

[0151] In one embodiment as in Fig. As shown in Figure 14, the housing 11 further comprises an insulating layer 1104. The insulating layer 1104 is provided between the inner surface of the casing 1102 and the side surface of the cell 13 in order to insulate the cell 13 from the casing 1102.

[0152] It should be noted, with reference to Fig. 14, that the insulating protective layer 1104 is provided on the outside of the support element 14.

[0153] It should also be noted that if the battery needs to vent, it will be under high temperature and high pressure. In this case, the venting of the gas will not be affected by the placement of the insulating layer 1104.

[0154] According to another aspect of the embodiment of the present invention, a battery pack is provided which comprises the battery described above.

[0155] The embodiments of the present invention are described below with reference to the Fig. described in sections 25 to 29.

[0156] According to one aspect of an embodiment of the present invention, a battery is provided comprising a housing 11, an explosion protection valve 22, an electrode assembly 23, and a support element 24. A receiving space 1101 is formed in the housing 11. The explosion protection valve 22 is provided on a side surface of the housing 11, and the electrode assembly 23 is arranged in the receiving space 1101. The support element 24 is arranged in the receiving space 1101, which is located between the side surface of the housing 11, on which the explosion protection valve 22 is located, and the electrode assembly 23. The support element 14 comprises an annular main body 2401 and a limiting section 2402, and the limiting section 2402 supports both sides of the inner ring of the annular main body 2401 along the width direction of the annular main body 2401.

[0157] By providing the support element 24, which is supported between the side surface of the housing 11 and the electrode assembly 23, a venting space is maintained between the housing 11 and the electrode assembly 23. This reduces resistance to the gas flow and facilitates the rapid release of the gas contained in the battery, thus ensuring battery safety. Furthermore, by providing the limiting section 2402, both sides of the annular main body 2401 are supported within the annular main body 2401. This prevents the support element 24 from being pressed in and deformed in the lateral direction, which facilitates the assembly of the support element 24 and ensures effective venting of the gas through the central opening 24011 of the annular main body 2401.

[0158] It should be noted that the gas contained in the battery passes through the central opening 24011 of the annular main body 2401 and is released through the explosion protection valve 22.

[0159] It should be noted that in the case of a battery with a relatively long length and relatively narrow width, such as a blade battery, the support element 24 is designed to conform to the side surface of the battery, resulting in the support element 24 also having a structure with a relatively long length and relatively narrow width. If the support element 24 is manufactured by injection molding, this is not only expensive but also requires segmented injection molding due to process limitations, which makes assembly significantly more difficult. Therefore, the support element 24 can be shaped in the manner of the Chinese character “ "(i.e., a ring-shaped structure) can be stamped, which is cost-effective and easy to produce. However, because the support element 24 is relatively long, the central part of the support element 24 becomes concave in the longitudinal direction, which complicates the assembly of the support element 24. Therefore, in the present embodiment, the limiting section 2402 can support the ring-shaped main body 2401, thus preventing deformation.

[0160] In one embodiment as described in the Fig. As shown in Figures 27 to 29, the limiting section 2402 comprises a first subsection 24021 and a second subsection 24022. The first end of the first subsection 24021 is connected to one side of the inner ring of the annular main body 2401, and the first end of the second subsection 24022 is connected to the other side of the inner ring of the annular main body 2401. The second ends of the first subsection 24021 and the second end of the second subsection 24022 are positioned close to each other.

[0161] This proximity of the first subsection 24021 and the second subsection 24022 ensures the overall supporting effect of the limiting section 2402 on the annular main body 2401. A gap is formed between the second end of the first subsection 24021 and the second end of the second subsection 24022. During the gas venting process, when the gas reaches a predetermined pressure, the first subsection 24021 or the second subsection 24022 can be displaced along its length, thereby connecting the central openings 24012 on both sides of the limiting section 2402, thus enabling the gas to be effectively released to the explosion protection valve 22.

[0162] It should be noted that when the pressure of the gas flowing into the central opening 24011 of the annular main body 2401 is high, the gas exerts force on the first subsection 24021 and the second subsection 24022, causing the first subsection 24021 and the second subsection 24022 to shift along their length. This arrangement increases the distance between the first subsection 24021 and the second subsection 24022, thereby connecting the central openings 24011 on both sides of the bounding section 2402.

[0163] It should be noted that the explosion protection valve 22 can be opened when the gas pressure reaches a first preset pressure “P1”, and the first subsection 24021 and the second subsection 24022 can be moved when the gas pressure reaches a third preset pressure “P2”, where “P2” is lower than “P1”.

[0164] In one embodiment, the gap between the second end of the first subsection 24021 and the second end of the second subsection 24022 is less than 0.5 mm. This arrangement ensures that the first subsection 24021 and the second subsection 24022 are displaceable under a predetermined pressure, while also guaranteeing the supporting effect of the first subsection 24021 and the second subsection 24022 on the annular main body 2401.

[0165] It should be noted that if the distance between the first subsection 24021 and the second subsection 24022 is too large, no effective support effect on both sides of the annular main body 2401 is possible, which leads to a significant deformation of the annular main body 2401.

[0166] In one embodiment as in Fig. As shown in Figure 29, an angle “α” between the side wall of the first subsection 24021 and the inner ring of the annular main body 2401 is greater than or equal to 120°, and an angle “α” between the side wall of the second subsection 24022 and the inner ring of the annular main body 2401 is greater than or equal to 120°. This arrangement prevents turbulence from forming at the connection between the side wall of the first subsection 24021 and the inner ring of the annular body 2401, as well as at the connection between the side wall of the second subsection 24022 and the inner ring of the annular body 2401, thus ensuring smooth gas transfer.

[0167] It should be noted that with regard to the Fig. 28 and Fig. 29, if the angle “α” is less than 120° and gas flows into the right central opening 24011 from the left central opening 24011 or flows into the left central opening 24011 from the right central opening 24011, the limiting sections 2402 (the first subsection 24021 and the second subsection 24022) significantly impede the gas flow, causing turbulence to form at the angles, which affects the gas circulation.

[0168] In one embodiment as in Fig. As shown in Figure 29, the side wall of the first subsection 24021 is temporarily connected to the second end of the first subsection 24021 via an arc-shaped structure, and the side wall of the second subsection 24022 is temporarily connected to the second end of the second subsection 24022 via an arc-shaped structure. This arrangement reduces the obstructive effect of the first subsection 24021 and the second subsection 24022 on the gas, allowing the gas to flow smoothly between the central openings 24011 located on both sides of the bounding section 2402.

[0169] In one embodiment as described in the Fig. 27 and Fig. As shown in Figure 28, a limiting section 2402 is provided, which is positioned along the longitudinal direction of the annular main body 2401. That is, a first subsection 24021 and a second subsection 24022 are each provided, with the first subsection 24021 being located at the central position on one side of the inner ring of the annular main body 2401 and the second subsection 24022 being located at the central position on the other side of the inner ring of the annular main body 2401, which makes it possible for the first subsection 24021 and the second subsection 24022 to be positioned opposite each other.

[0170] It is understood that in alternative embodiments, a plurality of limiting sections 2402 may be provided at intervals along the longitudinal direction of the annular main body 2401. This arrangement ensures the supporting effect of the limiting section 2402 on the annular main body 2401, while guaranteeing the ventilation space of the central opening 24012 of the annular main body 2401.

[0171] It should be noted that one or a multitude of limiting sections 2402 are provided which correspond to the weak points of the annular main body 2401, thereby providing a supporting role.

[0172] In one embodiment, referring to the Fig. 28 and Fig. 29, the first subsection 24021 and the second subsection 24022 are provided symmetrically along the transverse centerline of the annular main body 2401.

[0173] In this arrangement, the battery length “L” is greater than or equal to 300 mm, and the battery width “D” is less than or equal to 30 mm. Therefore, the support element 24, with its relatively long length and relatively short width, is applied to the battery, resulting in an annular main body 2401 with a relatively long length and relatively short width. The central position of the annular main body 2401 along its length tends to be indented and deformed. Therefore, by providing the limiting section 2402, a support can be provided on the annular main body 2401 to prevent deformation of the annular main body 2401.

[0174] In one embodiment, referring to the Fig. 13, Fig. 25, Fig. 15, Fig. 26, the central opening 24011 of the annular main body 2401 is designed to correspond to the explosion protection valve 22. Therefore, the gas in the battery can directly reach the explosion protection valve 22 after passing through the central opening 14012 of the annular main body 2401, which facilitates the escape of the gas.

[0175] In one embodiment as described in the Fig. 27 and Fig. As shown in Figure 28, the support element 24 further comprises a projecting section 2403 which is connected to the inner wall of the annular main body 2401 and extends towards the central opening 24011 of the annular main body 2401. This arrangement ensures adequate ventilation space in the central opening 24011 of the annular main body 2401, while increasing the support area of ​​the support element 24 between the housing 11 and the electrode assembly 23.

[0176] It should be noted that if the support area of ​​the support element 24 is too small, the support force of the support element 24 will be insufficient, and a stable venting space between the housing 11 and the electrode assembly 23 cannot be guaranteed. However, if the support area of ​​the support element 24 is increased, i.e., if the ring width of the annular main body 2401 is increased, the total area of ​​the central opening 24011 decreases, which is not conducive to venting. Therefore, in the present embodiment, a plurality of projecting sections 2403 are provided successively at intervals along the longitudinal direction of the inner ring of the annular main body 2401 to increase the support area. Furthermore, the overall area of ​​the central opening 24011 is not reduced, which ensures the venting effect. Furthermore, with reference to Fig. 28, a plurality of projecting sections 2403 located on one side of the inner ring of the annular main body 2401 are arranged offset from a plurality of projecting sections 2403 located on the other side of the inner ring of the annular main body 2401, thereby preventing obstruction of the gas by two projecting sections 2403 arranged opposite each other.

[0177] In one embodiment as described in the Fig. 12, Fig. 25, Fig. As shown in Figure 15, two explosion protection valves 22 are provided. The two explosion protection valves 12 are designed to correspond to the two central openings 14012, which are arranged on both sides of the limiting section 1402.

[0178] It is understood that alternative embodiments may provide a different number of explosion protection valves 22, for example one, two, three, four, etc. The number of explosion protection valves 22 can be specifically selected based on the design-specific requirements.

[0179] In one embodiment as in Fig. As shown in Figure 13, the housing 11 is a closed structure that encloses and forms the receiving chamber 1101. Specifically, the housing 11 comprises a jacket 2102 and a cover plate 2103. The jacket 2102 has openings at both ends. Two cover plates 2103 are provided, each configured to close one of the two openings at either end of the jacket 2102.

[0180] In other alternative embodiments, the sheath 2102 has an opening at one end and is closed at the other end. A cover plate 2103 is provided which is configured to close the opening at one end of the sheath 2102.

[0181] It should be noted that the cover plate 2103 is electrically connected to the electrode arrangement 23.

[0182] In one embodiment as in Fig. As shown in Figure 25, the housing 11 further comprises an insulating layer 2104. The insulating layer 2104 is provided between the inner surface of the sheath 2102 and the side surface of the electrode arrangement 23 in order to insulate the electrode arrangement 23 from the sheath 2102.

[0183] It should be noted, with reference to Fig. 25, the insulating protective layer 2104 is provided on the outside of the support element 24.

[0184] It should also be noted that if the battery needs to vent, it will be under high temperature and high pressure. In this case, the venting of the gas will not be affected by the placement of the insulating layer 2104.

[0185] According to another aspect of the embodiment of the present invention, a battery pack is provided which comprises the battery described above.

[0186] The embodiments of the present invention are described below with reference to the Fig. 1, 2, 4, 12 and 30 to 39 are described.

[0187] According to one embodiment of the present invention, a battery is provided comprising: a housing 1, an electrode assembly 32, and a support element 33. A receiving chamber is formed in the housing 1, and an explosion protection valve 3101 is provided on a side surface of the housing 1. The explosion protection valve 3101 is configured to open at a first preset pressure value. The electrode assembly 32 is provided in the cavity. The support element 33 is provided between the side surface of the housing 1, on which the explosion protection valve 3101 is located, and the electrode assembly 32. The support element 33 is provided with at least one fracture zone 3303, wherein at least one section of the fracture zone 3303 is designed as a thinned section 33031. The thickness of the thinned section 33031 is less than the thickness of the main body of the support element 33.The diluted section 33031 is configured to rupture at a second preset pressure value to connect the receiving chamber and the explosion protection valve 3101. The second preset pressure value is lower than the first preset pressure value.

[0188] In the battery of the present embodiment, a support element 33 is provided between the housing 1 and the electrode assembly 32. The support element 33 is located in the receiving chamber of the housing 1. One side of the support element 33 abuts the inner wall of the side surface of the housing 1, on which the explosion protection valve 3101 is located, and the other side abuts the electrode assembly 32. The support element 33 provides support between the electrode assembly 32 and the housing 1, ensuring a certain distance between the electrode assembly 32 and the housing 1. Furthermore, by providing a fracture zone 3303 on the support element 33, the thinned section 33031 of the fracture zone 3303 fractures before the explosion protection valve 3101 opens, thereby connecting the explosion protection valve 3101 to the receiving chamber in which the electrode assembly 32 is located.This arrangement increases the venting space, which allows gas in the receiving chamber to be quickly released to the location of the explosion protection valve 3101, ensuring that all gas in the battery escapes quickly through the explosion protection valve 3101, thus guaranteeing the safety of the battery.

[0189] It should be noted that the side surface of housing 1 refers to the surface extending along the "longitudinal direction" indicated by the arrow in Fig. As indicated in Figure 1, preferably one of the narrower side faces. The first preset pressure is the critical pressure value for opening the explosion protection valve 3101, and the second pressure value is the critical pressure value for rupturing the diluted section 33031. The second pressure value is slightly lower than the first. The fact that the second pressure value is lower than the first ensures that the fracture zone 3303 ruptures before the explosion protection valve 3101 opens. The projection of the fracture zone 3303 on the side face of the housing 1 covers the explosion protection valve 3101. If the gas pressure in the battery is too high, the pressurized gas ruptures, the explosion protection valve 3101 opens, and the gas in the battery can escape.The fact that the thickness of the thinned section 33031 is less than the thickness of the main body of the support element 33 means that the thickness of the thinned section 33031 is less than the thickness of the solid section of the support element 33, excluding the thinned section 33031. Since the thinned section 33031 is thinner, it has lower strength than other sections and may break first. Here, thickness refers to the measurement along the "thickness direction" indicated by the arrow in . Fig. 38 is displayed, which is also the measurement along the "vertical direction" indicated by the arrow in Fig. 30 is displayed.

[0190] In particular, one or a multitude of explosion protection valves 3101 can be provided and the exact number can be determined according to the design-specific requirements.

[0191] In one embodiment, the thickness of the thinned section 33031 is “H1” and the thickness of the main body of the support element 33 is “H”, where 0.05 ≤ H1 / H ≤ 0.5.

[0192] Furthermore, with reference to Fig. 38, it is true that the smaller the thickness of the thinned section 33031, the lower its strength. If “H1 / H” is less than 0.05, the thickness of the thinned section 33031 is too small, which makes manufacturing difficult, and the overall support structure 33 has insufficient strength, making it prone to deformation at the thinned section 33031. If “H1 / H” is greater than 0.5, the thickness of the thinned section 33031 is too large, the strength of the thinned section 33031 is too high, the thinned section 33031 cannot break under the second preset pressure, and the fracture zone 3303 does not rupture. If the structure does not rupture in time, the gas in the receiving chamber cannot be rapidly released to the explosion protection valve 3101, which reduces the safety of the battery. Therefore, the ratio of the thickness “H1” of the thinned section 33031 to the thickness “H” of the main body of the support element 33 is set between 0.05 and 0.5.This ensures that the support element 33 has sufficient strength to prevent deformation at the thinned section 33031, which also prevents the thinned section 33031 from having excessive strength, thus ensuring that the thinned section 33031 can break in time.

[0193] In one embodiment, each fracture zone 3303 comprises at least two thinned sections 33031 arranged at intervals. By providing at least two thinned sections 33031 at intervals, the area between the at least two thinned sections 33031 can be completely separated from the support element 33 after the fracture of one thinned section 33031, forming a larger fracture zone 3303. This enlarges the gas flow space and facilitates the rapid escape of gas from the receiving chamber to the explosion protection valve 3101. Furthermore, the arrangement of at least two thinned sections 33031 at intervals reduces the size of each thinned section 33031, preventing insufficient strength of the support body 3301 due to an excessively large size of a single thinned section 33031, thereby improving structural stability.Preferably, each fracture zone 3303 comprises two thinned sections 33031 for easier processing.

[0194] In other embodiments, each fracture zone 3303 may comprise only one thinned section 33031. The size of the thinned section 33031 may be relatively large, or the entire fracture zone 3303 may be a thinned section 33031. After a thinned section 33031 fractures, the entire area containing the thinned section 33031 serves as a gas channel, directing the gas in the receiving chamber to the explosion protection valve 3101.

[0195] In one embodiment, the support element 33 comprises an annular support body 3301 and a vent channel 3302, which is enclosed and formed by the support body 3301. The fracture zone 3303 is provided on the support body 3301. The thinned section 33031 is connected between an inner ring and an outer ring of the support body 3301. The thickness of the thinned section 33031 is less than the thickness of the support body 3301. After the thinned section 33031 fractures, it connects the external environment of the support element 33 to the vent channel 3302. The support body 3301 is configured to support the electrode assembly 32 and the housing 1, thereby ensuring a certain distance between the electrode assembly 32 and the housing 1.Furthermore, the vent channel 3302 connects the space containing the electrode assembly 32 to the explosion protection valve 3101, facilitating gas flow in the receiving chamber and increasing the venting area. This ensures that gas at the electrode assembly 32 location in the receiving chamber can be immediately released through the vent channel 3302 to the explosion protection valve 3101. Additionally, after the diluted section 33031 ruptures, before the explosion protection valve 3101 opens, the space outside the support element 33 is connected to the vent channel 3302. This ensures that gas outside the support element 33 can immediately flow into the vent channel 3302 and from there be released to the explosion protection valve 3101. This ensures that gas at any location within the battery can be immediately released through the explosion protection valve 3101, thus guaranteeing battery safety.It should be noted that the support body 3301 is the main body of the support element 33. The support body 3301 has an annular shape, with the inner ring referring to the ring closer to its center and the outer ring referring to the ring farther from the center. The outer environment of the support element 33 refers to the space in the direction extending away from the center of the outer ring. The projection of the vent channel 3302 on the side of the housing 1 covers the explosion protection valve 3101.

[0196] In other embodiments, the support element 33 comprises only the support body 3301. The support element 33 is a long, strip-shaped support plate. The fracture zone 3303 is located on the plate-shaped support body 3301. The thinned section 33031 is connected between the two longer sides of the support body 33. If the thinned section 33031 fractures, the resulting gap can connect the area in which the electrode assembly 32 is located to the explosion protection valve 3101, allowing the gas in the receiving chamber to be directed to the explosion protection valve 3101 and released from the battery through the explosion protection valve 3101, thus ensuring battery safety.

[0197] In one embodiment, the support element 33 has a shape resembling the Chinese character “ "and the support body 3301 comprises two side sections 33011 located at both ends of the support element 33 in the longitudinal direction, and two second side sections 33012 located at both ends of the support element 33 in the width direction. The longitudinal direction refers to the "longitudinal direction" indicated by the arrow in Fig. 34 is displayed, and the latitude direction refers to the "latitude direction" indicated by the arrow in Fig. Figure 34 is shown. The shape of the support element 33 is adapted to the side surface of the housing 1 on which the explosion protection valve 3101 is located. The structure is shaped in the manner of the Chinese character “ " is easy to manufacture and can be adapted to the space in housing 1. In particular, the support element 33 can be formed by stamping, which is cost-effective and easy to shape.

[0198] In one embodiment, each of the side sections 33011 is provided with a fracture zone 3303. The fracture zone 3303 has two thinned sections 33031 arranged at intervals. The distance between the two thinned sections 33031 is “L1”, and the dimension of the vent channel 3302 along the width direction is “L”, where 0.2 ≤ L1 / L ≤ 1. Furthermore, with reference to Fig. In reference 35, the distance “L1” between two diluted sections 33031 refers to a center-to-center distance between the two diluted sections 33031. The dimension “L” of the vent channel 3302 along the lattice direction is the distance between the two second side sections 33012. When the diluted section 33031 breaks, the section between the two diluted sections 33031 is completely separated from the support body 3301 to form a channel that conducts the gas. The maximum distance “L1” between the two diluted sections 33031 does not exceed the dimension “L” of the vent channel 3302 along the lattice direction.If “L1 / L” is less than 0.2, then the distance between the two thinned sections 33031 is too small, resulting in an insufficient cross-sectional area of ​​the gas-conducting channel and increased resistance for the gas flowing from the external environment of the support element 33 into the vent channel 3302, which is detrimental to gas venting. Therefore, the ratio of the distance “L1” between the two thinned sections 33031 and the width “L” of the vent channel 3302 is set between 0.2 and 1. This ensures that, after damage to the thinned section 33031, the cross-sectional area of ​​the gas-conducting channel formed by the fracture zone 3303 is sufficiently large to allow the gas to flow smoothly from the external environment of the support element 33 into the vent channel 3302.

[0199] In one embodiment, the support element 33 has an explosion protection zone 3304, corresponding to the explosion protection valve 3101. A fracture zone 3303 is provided on the second side section 33012 in the explosion protection zone 3304, and the fracture zone 3303 has at least two interval-provided diluted sections 33031. It should be noted that the explosion protection zone 3304 comprises two second side sections 33012, each of which is provided with a fracture zone 3303.By providing explosion protection zone 3304 on the support element 33, corresponding to the explosion protection valve 3101, and by providing the rupture zone 3303 on the second side section 33012 in explosion protection zone 3304, if the thinned section 33031 ruptures in rupture zone 3303, the gas channel formed at rupture zone 3303 can direct the gas directly from the external environment of the support element 33 to the position corresponding to the explosion protection valve 3101. This reduces the distance to the gas flow and thus rapidly releases the gas from the external environment of the support element 33, further improving battery safety. Specifically, each explosion protection valve 3101 corresponds to explosion protection zone 3304, and multiple rupture zones 3303 can be present in explosion protection zone 3304.There are no special requirements regarding the arrangement of the fracture zones 3303.

[0200] In one embodiment, the distance between two adjacent thinned sections 33031 on the second side section 33012 is “L2”, and the dimension of the explosion protection valve 3101 along the length of the support element 33 is “L3”, where 0.1 ≤ L2 / L3 ≤ 1.2. Furthermore, with reference to the Fig. 34, Fig. 36 and Fig. 39 is the distance “L2” between two adjacent thinned sections 33031 in the explosion protection zone 3304 near the length “L3” of the explosion protection valve 3101. If the ratio of “L2” to “L3” is less than 0.1, the distance between two adjacent thinned sections 33031 is too small. If the thinned section 33031 is damaged, the cross-sectional area of ​​the air inlet in the fracture zone 3303 is insufficient, resulting in higher resistance for the gas flowing from the external environment of the support element 33 into the vent channel 3302, which is not conducive to gas venting. If the ratio of “L2” to “L3” is greater than 1.2, it is possible to ensure a sufficient air inlet area. The area of ​​the fracture zone 3303 that is cut off is relatively large, which reduces the remaining support section of the support body 3301 for the electrode arrangement 32.This reduces its effectiveness with regard to the electrode assembly 32, causing it to sag and pose a risk to the venting channel 3302. Therefore, the ratio of the distance “L2” between two adjacent thinned sections 33031 on the second side section 33012 to the length “L3” of the explosion protection valve 3101 is set between 0.1 and 1.2, which ensures that after the fracture zone 3303 breaks, a sufficient venting area is formed, which also guarantees an effective support effect of the support body 3301 for the electrode assembly 32.

[0201] In one embodiment, the second side section 33012 of the support body 3301 has a plurality of projecting sections 33013 extending towards the vent channel 3302, each projecting section 33013 being arranged at intervals along the length of the support element 33 on the second side section 33012. By providing a projecting section 33013 on the second side section 33012, the surface area of ​​the support body 3301 is increased, ensuring that the support element 33 provides good support. Furthermore, the projecting section 33013 is small, which minimally obstructs the vent channel 3302. This allows the support element 33 to simultaneously meet the requirements of supporting and venting the gas, preventing the electrode arrangement 32 from being compressed and deformed while ensuring smooth venting of the gas.

[0202] In an optional embodiment, the projecting sections 33013, located on different side sections, are arranged in an offset configuration. It should be noted that the different side sections refer to two side sections 33012 that are arranged opposite each other along the width direction of the support element 33. The projecting sections 33013 on the two opposing second side sections 33012 are arranged in an offset configuration, which prevents the two projecting sections 33013 from being directly opposite each other. This results in more venting space, less obstruction of the gas flow, and smoother release. Compared to a structure in which the two projecting sections 33013 are directly opposite each other, the offset arrangement of the projecting sections 33013 allows for a suitable increase in the width direction of the projecting sections 33013 without affecting the gas flow.It also increases the support area, so that the support element 33 can provide a more effective support effect for the electrode arrangement 32.

[0203] In one embodiment, the thickness of the support element 33 is in the range of 0.5 mm to 5 mm. It should be noted that the thickness of the support element 33 refers to its dimension along the "vertical direction" indicated by the arrow in Fig. The thickness of the support element 33 determines the distance between the electrode assembly 32 and the sheath 3102, which directly affects the size of the venting space. If the thickness of the support element 33 is less than 0.5 mm, it is too thin, resulting in insufficient space between the electrode assembly 32 and the sheath 3102 along the vertical direction. This leads to an inadequate venting space in the vent channel 3302, resulting in increased resistance to gas venting and a potential safety hazard. If the thickness of the support element 33 is greater than 5 mm, it is too thick, occupying too much space in the sheath 3102. This reduces the height of the electrode assembly 32, decreases the battery's energy capacity, and hinders improvements in battery performance.Therefore, by setting the thickness of the support element 33 in the range of 0.5 mm - 5 mm, a sufficient venting area is ensured, which guarantees smooth venting of the gas and also improves the energy density of the battery.

[0204] In one embodiment, the projecting section 33013 is configured as one or more semicircles, triangles, rectangles, and trapezoids. These shapes are simple structures, easy to fabricate, and inexpensive to manufacture. In particular, when the projecting section 33013 is configured as one or more triangles, rectangles, and trapezoids, the corners are designed as smoothly transitioning arcs to reduce stress and improve stability.

[0205] In one embodiment, the support body 3301 further comprises at least one limiting section 3305, which is supported between two second side sections 33012. By providing the limiting section 3305 in the support body 3301 to support the two side sections 33012, it is possible to prevent the support element 33 from being pressed in or deformed in the lateral direction. This increases the overall strength of the support element 33, facilitates the assembly of the support element 33, and ensures the gas venting effect of the vent channel 3302. It should be noted that the limiting section 3305 is formed integrally with the support body 3301, which can be achieved by punching. At least one limiting section 3305 divides the vent channel 3302 into at least two regions, each region corresponding to at least one explosion protection valve 3101.The limiting section 3305 will not obstruct the explosion protection valve 3101, thus preventing the opening of the explosion protection valve 3101 from being affected.

[0206] In particular, the limiting section 3305 comprises a first limiting section 33051 and a second limiting section 33052. The first end of the first limiting section 33051 is connected to one side of the inner ring of the support body 3301, and the first end of the second limiting section 33052 is connected to the other side of the inner ring of the support body 3301. The second end of the first limiting section 33051 and the second end of the second limiting section 33052 are arranged close to each other to ensure the overall support effect of the limiting section 3305 on the support body 3301.

[0207] In one embodiment, the housing 1 is a closed structure that encloses and forms a receiving chamber. In particular, the housing 1 comprises a sheath 3102 and a cover plate 3103. The sheath 3102 has openings at both ends, and two cover plates 3103 are provided, each configured to close one of the two openings at either end of the sheath 3102. The cover plates 3103 are electrically connected to the electrode assembly 32.

[0208] In other embodiments, the sheath 3102 has an opening at one end and a closed end at the other end, with a single cover plate 3103 configured to close the opening at one end of the sheath 3102.

[0209] In one embodiment as described in the Fig. 31 and Fig.As shown in Figure 12, the housing 1 further comprises an insulating layer 3104. The insulating layer 3104 is provided between the inner surface of the jacket 3102 and the electrode assembly 32 to insulate the electrode assembly 32 from the jacket 3102. In particular, the insulating layer 3104 is provided on the outside of the support element 33, that is, the support element 33 is arranged between the insulating layer 3104 and the electrode assembly 32. When the battery needs to be vented, it is under high temperature and high pressure, and the placement of the insulating layer 3104 does not affect the release of the gas.

[0210] According to another aspect of the embodiment of the present invention, a battery pack is further provided which comprises the battery described above.

[0211] Although embodiments of the present invention are described here with reference to the accompanying drawings, it is understood that skilled persons may make various changes or variants without deviating from the spirit and scope of protection of the invention, and all such changes and variants fall within the scope of the accompanying claims.

Claims

[1] Battery, characterized by , that it includes: a housing in which a receiving chamber is formed, wherein an explosion protection valve is provided on a side surface of the housing, and the explosion protection valve is configured to open at a preset pressure value; an electrode arrangement that is provided in the recording chamber; a support element provided between the side surface of the housing on which the explosion protection valve is located and the electrode assembly, wherein the support element comprises a support body having an annular shape and a vent channel enclosed and formed by the support body, wherein the vent channel is configured to cover the explosion protection valve, a plurality of projecting sections extending towards the vent channel are provided on two side sections of the support body along a width direction of the support body, and the plurality of projecting sections are arranged at intervals on the same side section along a length direction of the support element. [2] Battery according to claim 1, characterized by that the projecting sections, which are located on different side sections, are arranged in an offset manner. [3] Battery according to claim 1, characterized by, that a total area of ​​the support element “S” is and an area of ​​the support body “S1” is, where 0.3 ≤ S1 / S ≤ 0.7 is satisfied. [4] Battery according to claim 1, characterized by , that a dimension of the support element along the width direction is “b” and a distance between two projecting sections located on different side sections of the support body along the width direction is “e”, where e ≥ 0.1b is satisfied. [5] Battery according to claim 3, characterized by , that a dimension “d” of the side section of the support body along the width direction and a dimension “b” of the support element along the width direction satisfy: 0.1 ≤ d / b ≤ 0.

2. [6] Battery according to claim 1, characterized by , that a distance “L” between two adjacent projecting sections on the same side section of the support body is in the range of 50 mm - 200 mm. [7] Battery according to any one of claims 1-6, characterized by, that the thickness of the support element is in the range of 0.5 mm - 5 mm. [8] Battery according to any one of claims 1-6, characterized by that the projecting sections are shaped as a semicircle or polygon. [9] Battery according to claim 8, characterized by , that the polygon consists of one or more: triangle, rectangle and trapezoid. [10] Battery pack, characterized by that it comprises the battery according to any one of claims 1 to 9. [11] Battery, characterized by , that it includes: a housing in which a recording chamber is formed; an explosion protection valve provided on a side surface of the housing; a cell located in the recording room; a support element provided in the receiving space, wherein the support element is located between the side surface of the housing on which the explosion protection valve is seated and the cell; wherein the support element comprises an annular main body and a limiting section, the limiting section being configured to support both sides of an inner ring of the annular main body along a width direction of the annular main body; wherein the annular main body has a plurality of thinned sections provided at intervals along a circumferential direction of the annular main body, and the plurality of thinned sections being configured to extend along the width direction of the annular main body. [12] Battery according to claim 11, characterized by that one or a multitude of thinned sections are provided on two long sides and / or two short sides of the annular main body. [13] Battery according to claim 12, characterized by , that the thinned sections located on the long sides of the annular main body are designed to correspond to the position of the explosion protection valve. [14] Battery according to claim 12, characterized by , that two thinned sections are provided at intervals on the short sides of the annular main body, at a center-to-center distance “d” between the two thinned sections, and with a width “c” of the central opening of the annular main body, where d≥0.5 * c is satisfied. [15] Battery according to any one of claims 11 to 14, characterized by , that the thickness of the support element is “h” and the thickness of the thinned section is “e”, where 0.05*h≤e≤0.2*h is satisfied; and / or two explosion protection valves are provided at intervals, the center-to-center distance between the two explosion protection valves is “y”, and the battery length is “L”, where 1 / 3 ≤ y / L ≤ 1 / 2 is satisfied; and / or the battery length L≥300 mm and the battery width D≤30 mm; and / or a length of the battery “L” and a width of the battery “D”; where L / D≥10; and / or a width of the housing “B” and a width of the support element “b”, where b≥0.5*B is satisfied; and / or a wall thickness of the side surface of the housing on which the explosion protection valve is located, “g”, where g≥0.95 mm is satisfied; and / or a thickness of the support element “h” where 0.5 mm≤h≤2 mm is satisfied. [16] Battery according to any one of claims 11 to 14, characterized by, that the limiting section comprises a first subsection and a second subsection, a first end of the first subsection is connected to one side of the inner ring of the annular main body and a first end of the second subsection is connected to the other side of the inner ring of the annular main body, and the second end of the first subsection and the second end of the second subsection are positioned close to each other. [17] Battery according to claim 16, characterized by , that the gap between the second end of the first subsection and the second end of the second subsection is less than 0.5 mm; and / or an angle “α” between the side wall of the first subsection and the inner ring of the annular main body is greater than or equal to 120° and an angle “α” between the side wall of the second subsection and the inner ring of the annular main body is greater than or equal to 120°; and / or the side wall of the first subsection is temporarily connected to the second end of the first subsection via an arc-shaped structure, and the side wall of the second subsection is temporarily connected to the second end of the second subsection via an arc-shaped structure. [18] Battery according to any one of claims 11 to 14, characterized by , that the supporting element further comprises a projecting section which is connected to the inner wall of the annular main body and extends in the direction of the central opening of the annular main body. [19] Battery according to claim 18, characterized by, that a total area of ​​the side of the support element facing the explosion protection valve is “S”, and a sum of the areas of the annular main body and the projecting section facing the explosion protection valve is “S1”, where 0.2 ≤ S1 / S ≤ 0.8 is satisfied; and / or a width of the support element is “b”, and a distance between two projecting sections along a width direction of the support element is “f”, where f ≥ 0.25 * b is satisfied. [20] Battery pack, characterized by , that it comprises the battery according to any one of claims 11 to 19. [21] Battery, characterized by , that it includes: a housing in which a recording chamber is formed; an explosion protection valve provided on a side surface of the housing; an electrode array located in the recording space; a support element provided in the receiving space, wherein the support element is located between the side surface of the housing on which the explosion protection valve is seated and the electrode assembly; wherein the support element comprises an annular main body and a limiting section, the limiting section being configured to support both sides of an inner ring of the annular main body along a width direction of the annular main body. [22] Battery according to claim 21, characterized by, that the limiting section comprises a first subsection and a second subsection, a first end of the first subsection is connected to one side of the inner ring of the annular main body and a first end of the second subsection is connected to the other side of the inner ring of the annular main body, and the second end of the first subsection and the second end of the second subsection are positioned close to each other. [23] Battery according to claim 22, characterized by , that the gap between the second end of the first subsection and the second end of the second subsection is less than 0.5 mm. [24] Battery according to claim 22 or 23, characterized by, that an angle “α” between the side wall of the first subsection and the inner ring of the annular main body is greater than or equal to 120° and / or an angle “α” between the side wall of the second subsection and the inner ring of the annular main body is greater than or equal to 120°. [25] Battery according to claim 22 or 23, characterized by , that the side wall of the first subsection is temporarily connected to the second end of the first subsection via an arc-shaped structure, and / or that the side wall of the second subsection is temporarily connected to the second end of the second subsection via an arc-shaped structure. [26] Battery according to any one of claims 21 to 23, characterized by, that a limiting section is provided which corresponds to the mean position of the annular main body along a longitudinal direction of the annular main body; or that a plurality of limiting sections are provided at intervals along the longitudinal direction of the annular main body. [27] Battery according to any one of claims 21 to 23, characterized by , that the length “L” of the battery is greater than or equal to 300 mm, and the width “D” of the battery is less than or equal to 30 mm. [28] Battery according to any one of claims 21 to 23, characterized by , that the central opening of the annular main body is designed to correspond to the explosion protection valve. [29] Battery according to any one of claims 21 to 23, characterized by, that the supporting element further comprises a projecting section which is connected to the inner wall of the annular main body and extends in the direction of the central opening of the annular main body. [30] Battery pack, characterized by , that it comprises the battery according to one of claims 21 to 29. [31] Battery, characterized by , that it includes: a housing in which a receiving chamber is formed, an explosion protection valve provided on a side surface of the housing, wherein the explosion protection valve is configured to open at a preset pressure value; an electrode arrangement that is provided in the recording chamber; a support element located between the side surface of the housing on which the explosion protection valve is seated and the electrode assembly, wherein the support element is provided with at least one fracture zone, at least one section of the fracture zone is designed as a thinned section, the thickness of the thinned section is less than the thickness of the main body of the support element, the thinned section is configured to break at a second preset pressure value in order to connect the receiving chamber and the explosion protection valve, the second preset pressure value being lower than the first preset pressure value. [32] Battery according to claim 31, characterized by , that the thickness of the thinned section is “H1” and the thickness of the main body of the support element is “H”, where 0.05 ≤ H1 / H ≤ 0.5 is satisfied. [33] Battery according to claim 32, characterized bythat each fracture zone comprises at least two thinned sections, provided at intervals. [34] Battery according to any one of claims 31 to 33, characterized by , that the support element comprises a support body which has an annular shape, and a vent channel which is enclosed and formed by the support body, the fracture zone is provided on the support body and the thinned section is connected between an inner ring and an outer ring of the support body. [35] Battery according to claim 34, characterized by that the supporting element has a shape in the style of the Chinese character “ "or has a shape in the form of nested rectangles, and the support body comprises two first side sections located at both ends in the longitudinal direction of the support element, and two second side sections located at both end sections in the width direction of the support element. [36] Battery according to claim 35, characterized by , that each first side section is provided with a fracture zone, the fracture zone comprises two intervalally provided thinned sections, a distance between the two thinned sections is “L1”, and a measure of the vent channel in the width direction is “L”, where 0.2 ≤ L1 / L ≤ 1 is satisfied. [37] Battery according to claim 35, characterized by , that the support element includes an explosion protection zone corresponding to the explosion protection valve, and the fracture zone is provided on the second side section of the explosion protection zone, the fracture zone comprising at least two intervalally provided diluted sections. [38] Battery according to claim 37, characterized by, that a distance between two adjacent thinned sections on the second side section is “L2”, and a measure of the explosion protection valve along the longitudinal direction of the support element is “L3”, where 0.1 ≤ L2 / L3 ≤ 1.2 is satisfied. [39] Battery according to claim 35, characterized by , that the second side section of the support body is provided with a plurality of projecting sections extending in the direction of the vent channel, and the plurality of projecting sections are arranged at intervals along the longitudinal direction of the support element on every second side section. [40] Battery pack, characterized by that it comprises the battery according to one of claims 31 to 39.

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