Battery pack and powered device

Abstract

The present disclosure provides a battery pack and an electric device. The battery pack comprises a battery and a box. The battery is provided with an explosion-proof valve. The box contains the battery, including a heat exchange plate supporting the battery and comprising an exhaust hole below the explosion-proof valve, and a bottom guard plate below the heat exchange plate and forming an exhaust space with the heat exchange plate, into which the spatter of the explosion-proof valve enters through the exhaust hole when the battery is thermally failed. A protective piece is arranged on the hole rim of the exhaust hole, covering at least part of the hole rim. The protective piece covers and protects at least part of the hole rim, significantly enhancing the high-temperature resistance and ablation resistance of the edge of the exhaust hole, effectively preventing the high-temperature spatter spouted when the battery is out of control from melting through or damaging the heat exchange plate, thereby avoiding leakage of the cooling liquid and improving the overall safety and reliability of the battery pack.

Description

Technical Field

[0001] This disclosure relates to the field of batteries, and in particular, to a battery pack and an electrical device having the battery pack. Background Technology

[0002] A battery pack, comprising a battery and a heat exchange plate, is known to generate heat during normal battery cycling, which is dissipated through heat exchange by the heat exchange plate. In the event of thermal runaway, the battery's explosion-proof valve ejects high-temperature ejected material, which is discharged through pre-designed vents on the heat exchange plate. However, due to the limited high-temperature resistance of the heat exchange plate, the high-temperature ejected material is highly susceptible to ablation or melting through the vent edges as it flows through the vents, leading to localized melting or structural failure of the heat exchange plate, and consequently, internal coolant leakage. Utility Model Content

[0003] In view of this, the present disclosure provides a battery pack to solve the problem that high-temperature ejected material is easily ablated or melted through the vent holes when flowing through them, leading to localized melting of the heat exchange plate or structural failure.

[0004] The battery pack includes a battery and a housing. The battery is equipped with an explosion-proof valve. The housing houses the battery and includes a heat exchange plate and a bottom protective plate. The heat exchange plate supports the battery and includes a vent located below the explosion-proof valve. The bottom protective plate is located below the heat exchange plate and forms a venting space between the bottom protective plate and the heat exchange plate. In the event of battery thermal failure, the ejected material from the explosion-proof valve enters the venting space through the vent. A protective element is provided on the edge of the vent, covering at least a portion of the edge.

[0005] According to the above structure, in the event of battery thermal runaway, high-temperature gas and ejected materials are released from the explosion-proof valve at the bottom of the battery, enter the exhaust space through the vent holes on the heat exchange plate, and are discharged outside the casing via the bottom protective plate, thereby preventing direct impact on other areas of the heat exchange plate. A protective component is provided around the circumference of the vent hole edge, covering and protecting at least a portion of the hole edge. This significantly enhances the high-temperature resistance and ablation resistance of the vent hole edge, effectively preventing the high-temperature ejected materials from melting through or damaging the heat exchange plate during battery thermal runaway. This avoids coolant leakage and reduces the risk of insulation failure and secondary thermal runaway due to coolant leakage, improving the overall safety and reliability of the battery pack.

[0006] This disclosure also provides an electrical appliance. The electrical appliance includes the aforementioned battery pack. Attached Figure Description

[0007] It should be understood that the following figures only illustrate certain embodiments of this disclosure and should not be construed as limiting the scope.

[0008] It should be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements.

[0009] It should be understood that the accompanying drawings are only schematic, and the dimensions and scales of the elements in the drawings are not necessarily precise.

[0010] Figure 1 This is a schematic diagram of the structure of a battery pack according to an embodiment of the present disclosure.

[0011] Figure 2 For along Figure 1 A schematic cross-sectional view of the battery pack.

[0012] Figure 3 for Figure 2 A magnified view of part A in the middle.

[0013] Figure 4 This is a partial cross-sectional view of a battery pack according to another embodiment of the present disclosure.

[0014] Figure 5 This is a partial cross-sectional view of a battery pack according to another embodiment of the present disclosure.

[0015] Figure 6 This is a partial cross-sectional view of a battery pack according to another embodiment of the present disclosure.

[0016] Figure 7 This is a partial cross-sectional view of a battery pack according to another embodiment of the present disclosure.

[0017] Figure 8 This is a partial cross-sectional view of a battery pack according to another embodiment of the present disclosure.

[0018] Figure 9 for Figure 2 A schematic diagram of the structure of the central exhaust port and protective components.

[0019] Figure 10 This is a schematic diagram of the structure of an electrical device according to an embodiment of the present disclosure.

[0020] Explanation of reference numerals in the attached figures: 100—Battery pack; 10—Battery; 11—Explosion-proof valve; 20—Box body; 21—Heat exchange plate; 211—Exhaust vent; 212—Hole edge; 213—Protective component; 2131—Main body; 2132—Upper part; 2133—Lower part; 214—Flow channel; 22—Bottom guard plate; 23—Exhaust space; 30—Box top cover; 40—Battery management system; 50—Separation beam; 200—Electrical equipment. Detailed Implementation

[0021] Numerous specific details are set forth below to provide an understanding of the structure, function, and use of the embodiments described and illustrated in the specification and figures. It is to be understood that the embodiments described and illustrated herein are non-limiting examples, and thus it will be appreciated that the particular structural and functional details disclosed herein are representative and exemplary. Variations and changes may be made to these embodiments without departing from the scope of the claims.

[0022] <Example Battery Pack> To prevent high-temperature ejected material from melting or damaging the heat exchange plates during battery thermal runaway, one embodiment of this disclosure provides a battery pack 100. (See reference...) Figure 1 The battery pack includes batteries 10, a housing 20, a housing top cover 30, and a battery management system 40, with multiple batteries 10 electrically connected to each other. The housing 20 houses the batteries 10 and the battery management system 40. The batteries 10 are electrically connected to the battery management system 40, enabling the charging and discharging of multiple batteries 10. The batteries 10 and the battery management system 40 are separated by a partition beam 50. The housing 20 and housing top cover 30 serve as external protective structures, typically made of metal or composite materials, and are waterproof, dustproof, and impact-resistant, providing a safe operating environment for the internal components such as the batteries 10 and the battery management system 40.

[0023] The battery pack 100 may also include a battery group composed of multiple batteries 10 connected in series and parallel, and integrate a battery management system 40 (BMS), a thermal management system, an electrical connection system (high-voltage / low-voltage connectors, wiring harnesses, etc.), structural components (casing, brackets, etc.), and protective components 2134. These components are housed within the receiving cavity of the housing 20 and sealed by the housing top cover 30, forming a complete functional unit capable of directly outputting electrical energy. The battery pack 100 can serve as a power source for new energy vehicles, primarily used for storing and providing electrical energy, acting as a rechargeable battery 10.

[0024] refer to Figure 2 The battery 10 is equipped with an explosion-proof valve 11. For example, the explosion-proof valve 11 can be located at the bottom of the battery 10. The housing 20 houses the battery 10 and includes a heat exchange plate 21 and a bottom guard plate 22. The heat exchange plate 21 supports the battery 10 and includes an exhaust port 211 located below the explosion-proof valve 11. The bottom guard plate 22 is located below the heat exchange plate 21 and forms an exhaust space 23 between the bottom guard plate 22 and the heat exchange plate 21. When the battery 10 fails thermally, the ejected material from the explosion-proof valve 11 enters the exhaust space 23 through the exhaust port 211. A protective member 213 is provided on the edge 212 of the exhaust port 211, and the protective member 213 covers at least a portion of the edge 212.

[0025] According to the above structure, in the event of thermal runaway of battery 10, high-temperature gas and ejected material are released from the explosion-proof valve 11 at the bottom of battery 10, enter the exhaust space 23 through the exhaust port 211 on the heat exchange plate 21, and are discharged outside the housing 20 via the bottom protective plate 22, thereby preventing the high-temperature ejected material from directly impacting other areas on the heat exchange plate 21. A protective member 213 is provided circumferentially around the edge 212 of the exhaust port 211, which covers and protects at least a portion of the edge 212. In another embodiment, the protective member 213 may cover the entire edge 212. This enhances the high-temperature resistance and ablation resistance of the edge of the exhaust port 211, effectively preventing the high-temperature ejected material from melting through or damaging the heat exchange plate 21 during thermal runaway of battery 10, thereby preventing coolant leakage and reducing the risk of insulation failure and secondary thermal runaway due to coolant leakage, thus improving the overall safety and reliability of the battery pack.

[0026] refer to Figure 2 and Figure 3 The protective component 213 may include a body portion 2131, which continuously covers the entire circumference of the vent hole 211's edge 212. The vent hole edge 212 is the most vulnerable and susceptible area to high-temperature impact on the heat exchange plate 21. The continuous circumferential coverage of the body portion 2131 provides complete high-temperature protection for the entire circumference of the vent hole 211 when high-temperature ejected material passes through it, thereby improving the reliability of protection for critical weak areas of the heat exchange plate 21.

[0027] Continue to refer to Figure 3The heat exchange plate 21 is provided with a flow channel 214. The orthographic projection of the battery 10 on the heat exchange plate 21 partially overlaps with the flow channel 214. The distance from the hole edge 212 to the flow channel 214 is D1 (in mm), and the distance from the inner periphery of the body part 2131 to the hole edge 212 is D2 (in mm), where 0.01 ≤ D2 / D1 ≤ 2. Preferably, z1a ≤ D2 / D1 ≤ z1b. More preferably, z1c ≤ D2 / D1 ≤ z1d. Alternatively, the ratio D2 / D1 can also be z1e, z1f, z1g, or z1h, etc. The projection of battery 10 onto heat exchange plate 21 partially overlaps with flow channel 214. This means that flow channel 214 on heat exchange plate 21 can exchange heat with the corresponding battery 10. If D2 / D1 is too small (less than 0.01), the protective effect of protective component 213 will be insufficient when battery 10 experiences thermal failure. High-temperature ejected material may still burn the edge of protective component 213 and further melt through the sidewall of flow channel 214 near the hole edge 212, leading to coolant leakage. If D2 / D1 is too large (greater than 2), the body 2131 will excessively encroach on the inner circumferential space of exhaust port 211, potentially causing the outlet of explosion-proof valve 11 to not be aligned with the exhaust port 211 on heat exchange plate 21, affecting the smooth discharge of high-temperature ejected material. Based on the above ratio range, it is ensured that the thermal impact of high-temperature ejected material is sufficiently isolated outside flow channel 214, avoiding coolant leakage due to inadequate protection.

[0028] Further, 1mm ≤ D1 ≤ 10mm. Preferably, 2mm ≤ D1 ≤ 9mm. More preferably, 3mm ≤ D1 ≤ 8mm. Alternatively, the value of D1 can also be 4mm, 5mm, 6mm, or 7mm, etc. Further, 0.1mm ≤ D2 ≤ 2mm. Preferably, 0.4mm ≤ D2 ≤ 1.6mm. More preferably, 0.8mm ≤ D2 ≤ 1.2mm. Alternatively, the value of D2 can also be 0.9mm, 1mm, 1.1mm, or 1.15mm, etc. If D2 is too small, i.e., D2 is less than 0.1mm, the protective effect of the protective component 213 will be insufficient when the battery 10 experiences thermal failure. If D2 is too large, i.e., D2 is greater than 2mm, the body part 2131 will excessively occupy the inner circumferential space of the vent hole 211. According to the above proportional range, the thermal impact of high-temperature ejected material on the flow channel 214 is avoided.

[0029] refer to Figure 2 and Figure 4The protective component 213 may further include an upper portion 2132 connected to the top of the main body 2131, the upper portion 2132 extending upward and protruding beyond the aperture 212. The upwardly protruding upper portion 2132 can provide additional protection height when the high-temperature ejected material vertically impacts the surface of the heat exchange plate 21, preventing the high-temperature ejected material from scorching the aperture 212 of the exhaust port 211 when passing through it, effectively blocking the direct high-temperature erosion of the area surrounding the aperture 212 by the ejected material. The upper portion 2132 may extend towards the battery 10.

[0030] Continue to refer to Figure 4 The height of the upper part 2132 extending beyond the edge of the hole 212 is H1 (in mm), and the thickness of the edge of the hole 212 is T1 (in mm), where 0.01 ≤ H1 / T1 ≤ 2. Preferably, 0.1 ≤ H1 / T1 ≤ 1.9. More preferably, 0.5 ≤ H1 / T1 ≤ 1.5. Alternatively, the ratio H1 / T1 can also be 0.7, 0.9, 1.1, or 1.3, etc. The thickness in this disclosure can be a distance perpendicular to the direction of the base plate. If H1 / T1 is too small, i.e., H1 / T1 is less than 0.01, it indicates that the protrusion height of the upper part 2132 is insufficient, making it difficult to effectively block and guide the ejected high-temperature ejected material. Some of the ejected material may pass over the protective member 213 and directly splash onto the plane of the heat exchange plate 21 around the edge of the hole 212, causing ablation. If H1 / T1 is too large, i.e., H1 / T1 is greater than 2, the excessively high protrusion will cause gaps or poor contact between the battery 10 and the heat exchange plate 21, disrupting the heat conduction path and weakening the normal heat dissipation effect of the heat exchange plate 21 on the battery 10. Based on the above ratio range, ensure that the thermal impact of the high-temperature ejected material is adequately isolated outside the flow channel 214 to avoid coolant leakage due to inadequate protection.

[0031] Further, 0.1mm ≤ H1 ≤ 2mm. Preferably, 0.3mm ≤ H1 ≤ 1.8mm. More preferably, 0.5mm ≤ H1 ≤ 1.5mm. Alternatively, the value of H1 can also be 0.7mm, 0.9mm, 1.1mm, or 1.3mm, etc. If H1 is too small, i.e., H1 is less than 0.1mm, the upper part 2132 will have difficulty effectively blocking and guiding the ejected high-temperature ejected material. If H1 is too large, i.e., H1 is greater than 2mm, the upper part 2132 may encroach on the space layout of the battery 10. Further, 1mm ≤ T1 ≤ 10mm. Preferably, 2mm ≤ T1 ≤ 9mm. More preferably, 3mm ≤ T1 ≤ 8mm. Alternatively, the value of T1 can also be 4mm, 5mm, 6mm, or 7mm, etc.

[0032] refer to Figure 2 and Figure 5 The upper part 2132 can extend outward beyond the aperture 212 and cover at least a portion of the top surface of the heat exchange plate 21, the top surface being... Figure 2In the X+ direction. That is, the upper part 2132 of the protective member 213, while protruding upwards, extends horizontally outwards, and the upper part 2132 can cover and enclose at least a portion of the top surface of the heat exchange plate 21 around the aperture 212. This provides protection for the area around the exhaust port 211, effectively preventing direct ablation and thermal damage to the top surface of the heat exchange plate 21 from ejected material. In another embodiment, the upper part 2132 may also cover the entire top surface of the heat exchange plate 21.

[0033] Continue to refer to Figure 5 The heat exchange plate 21 is provided with a flow channel 214. The orthographic projection of the battery 10 on the heat exchange plate 21 partially overlaps with the flow channel 214. The distance from the hole edge 212 to the flow channel 214 is D1 (in mm), and the distance from the outer periphery of the upper part 2132 to the hole edge 212 is D3 (in mm), where 0.1 ≤ D3 / D1 ≤ 10. Preferably, 0.5 ≤ D3 / D1 ≤ 9. More preferably, 1 ≤ D3 / D1 ≤ 8. Alternatively, the ratio D3 / D1 can also be 2, 3, 5, or 7. If D3 / D1 is too small, i.e., D3 / D1 is less than 0.1, it indicates that the coverage area extending outward from the upper part 2132 is too small, and it cannot effectively protect the top surface area of ​​the heat exchange plate 21 most susceptible to thermal shock around the hole edge 212. High-temperature ejected material may still erode the flow channel 214. If D3 / D1 is too large, i.e., D3 / D1 is greater than 10, the excessively large protective component 213 will overly cover the surface of the heat exchange plate 21, hindering the contact heat exchange between the heat exchange plate 21 and the battery 10, and affecting the overall heat dissipation performance of the heat exchange plate 21. According to the above ratio range, it is ensured that the thermal impact of the high-temperature ejected material is fully isolated outside the flow channel 214 to avoid coolant leakage due to inadequate protection.

[0034] Further, 1mm ≤ D3 ≤ 10mm. Preferably, 2mm ≤ D3 ≤ 9mm. More preferably, 3mm ≤ D3 ≤ 8mm. Alternatively, the value of D3 can also be 4mm, 5mm, 6mm, or 7mm, etc. If D3 is too small, i.e., D3 is less than 1mm, the upper part 2132 cannot effectively protect the top surface area of ​​the heat exchange plate 21 around the hole edge 212, which is most susceptible to thermal shock. If D3 is too large, i.e., D3 is greater than 10mm, the upper part 2132 may hinder the contact heat exchange between the heat exchange plate 21 and the battery 10.

[0035] refer to Figure 2 and Figure 6 The protective component 213 may further include a lower portion 2133 connected to the bottom end of the main body 2131, the lower portion 2133 extending downward and protruding beyond the bore edge 212. The downwardly protruding lower portion 2133 can further guide the high-temperature ejected material downwards, reducing the scorching of the ejected material on the bottom surface of the heat exchange plate 21. The bottom surface can be... Figure 2 In the X-direction.

[0036] Continue to refer to Figure 6 The height of the lower part 2133 extending beyond the edge of the hole 212 is H2 (in mm), and the thickness of the edge of the hole 212 is T1 (in mm), with 0.01 ≤ H2 / T1 ≤ 2. Preferably, 0.1 ≤ H2 / T1 ≤ 1.8. More preferably, 0.5 ≤ H2 / T1 ≤ 1.5. Alternatively, the ratio H2 / T1 can also be 0.7, 0.9, 1.1, or 1.3. If H2 / T1 is too small, i.e., H2 / T1 is less than 0.01, it indicates that the downward protrusion height of the lower part 2133 is insufficient, and the high-temperature ejected material may not be smoothly guided downwards and discharged, but instead diffuses near the exhaust hole 211, increasing the risk of thermal shock to the bottom surface of the heat exchange plate 21. If H2 / T1 is too large, i.e., H2 / T1 is greater than 0.01, it indicates that the downward protrusion of the lower part 2133 is too large, which may lead to contact or collision with the underbody protection plate 22 below. Especially under vehicle vibration or impact conditions, this could damage the underbody protection plate 22 or the protective component 213 itself, or even affect the protective function of the underbody protection plate 22. Based on the above ratio range, it is ensured that the lower part 2133 of the protective component 213 can effectively guide and protect the airflow without interfering with exhaust or causing structural problems.

[0037] Further, 0.1mm ≤ H2 ≤ 2mm. Preferably, 0.3mm ≤ H2 ≤ 1.8mm. More preferably, 0.5mm ≤ H2 ≤ 1.5mm. Alternatively, the value of H2 can also be 0.7mm, 0.9mm, 1.1mm, or 1.3mm, etc. If H2 is too small, i.e., H2 is less than 0.1mm, the high-temperature ejected material may not be able to be smoothly guided downwards and discharged, thus impacting the heat exchange plate 21. If H2 is too large, i.e., H2 is greater than 2mm, the underbody protection plate 22 may be damaged under vehicle vibration or impact conditions.

[0038] refer to Figure 2 and Figure 7 The lower portion 2133 extends outward beyond the aperture 212 and covers at least a portion of the bottom surface of the heat exchange plate 21. In other words, the lower portion 2133 of the protective member 213, in addition to its downward protrusion, extends horizontally outward, covering and enveloping at least a portion of the bottom surface of the heat exchange plate 21 surrounding the aperture 212. This provides protection for the area around the exhaust port 211 on the heat exchange plate 21, effectively preventing direct ablation and thermal damage to the bottom surface of the heat exchange plate 21 from ejected material. In another embodiment, the lower portion 2133 may also cover the entire bottom surface of the heat exchange plate 21.

[0039] Continue to refer to Figure 7The heat exchange plate 21 is provided with a flow channel 214. The orthographic projection of the battery 10 on the heat exchange plate 21 partially overlaps with the flow channel 214. The distance from the hole edge 212 to the flow channel 214 is D1 (mm), and the distance from the outer periphery of the lower part 2133 to the hole edge 212 is D4 (mm). 0.1≤D4 / D1≤1. Preferably, 0.2≤D4 / D1≤0.9. More preferably, 0.3≤D4 / D1≤0.8. Alternatively, the ratio D4 / D1 can also be 0.4, 0.5, 0.6, or 0.7, etc. If D4 / D1 is too small, i.e., D4 / D1 is less than 0.1, it indicates that the horizontally extended coverage area of ​​the lower part 2133 is too small, and it cannot effectively protect the bottom surface area of ​​the heat exchange plate 21 most vulnerable to impact from high-temperature ejected materials around the hole edge 212. The high-temperature ejected materials may still ablate the unprotected sidewall of the flow channel 214. If D4 / D1 is too large, i.e., D4 / D1 is greater than 1, it indicates that the horizontally extended coverage area of ​​the lower part 2133 is too large, which may encroach on the layout space of the flow channel 214 inside the heat exchange plate 21, causing local compression of the flow channel 214. Alternatively, under vehicle vibration or impact conditions, the excessive extension may collide or compress with the flow channel 214 due to structural interference, thereby damaging the structure of the flow channel 214. Based on the above ratio range, it is ensured that the thermal impact of high-temperature ejected materials is sufficiently isolated outside the flow channel 214, avoiding coolant leakage due to inadequate protection.

[0040] Further, 1mm ≤ D4 ≤ 10mm. Preferably, 2mm ≤ D4 ≤ 9mm. More preferably, 3mm ≤ D4 ≤ 8mm. Alternatively, the value of D4 can also be 4mm, 5mm, 6mm, or 7mm, etc. If D4 is too small, i.e., D4 is less than 1mm, the lower part 2133 cannot effectively protect the bottom surface of the heat exchange plate 21, which is most susceptible to impact from high-temperature ejected materials, around the hole edge 212. If D4 is too large, i.e., D4 is greater than 10mm, the lower part 2133 may encroach on the layout space of the internal flow channel 214 of the heat exchange plate 21.

[0041] refer to Figure 2 and Figure 8The protective component 213 may also include an upper part 2132 connected to the top of the main body 2131 and a lower part 2133 connected to the lower end of the main body 2131. The upper part 2132 extends upward and protrudes beyond the hole edge 212, and the lower part 2133 extends downward and protrudes beyond the hole edge 212. The upper part 2132 extends outward beyond the hole edge 212, and the lower part 2133 extends outward beyond the hole edge 212. The height of the upper part 2132 beyond the hole edge 212 is H1 (in mm), and the height of the lower part 2133 beyond the hole edge 212 is H2 (in mm). The distance from the outer periphery of the upper part 2132 to the hole edge 212 is D3 (in mm), and the distance from the outer periphery of the lower part 2133 to the hole edge 212 is D4 (in mm). H1 < H2, D3 < D4. In other words, the upward extension of the upper part 2132 of the protective component 213 is less than the downward extension of the lower part 2133, and the lateral extension of the upper part 2132 is less than the lateral extension of the lower part 2133. This avoids excessive protrusion affecting the contact and heat dissipation between the battery 10 and the heat exchange plate 21. After the high-temperature ejected material is discharged, it needs sufficient space in the exhaust channel for expansion and flow. The longer lower part 2133 can form a better flow channel, effectively preventing the ejected material from flowing turbulently in the exhaust channel, thereby better protecting the bottom protective plate 22.

[0042] refer to Figure 9 The aperture 212 may include a monoid shape surrounded by two straight segments 2121 and two arc segments 2122. The protective member 213 includes two protective portions 2134, which respectively cover the two straight segments 2121, while the two arc segments 2122 are exposed. The area of ​​the straight segments 2121 is closer to the sidewall of the adjacent cooling channel 214, and is at higher risk of thermal damage when impacted by high-temperature ejected material, making it more likely for the channel 214 to be burned through. The arc segments 2122 are farther from the sidewall of the channel 214, and have a lower risk of burning through. According to the above structure, critical weak areas can be protected, effectively preventing the cooling channel 214 from melting through and leaking. At the same time, the amount of protective material used can also be reduced.

[0043] The protective component 213 is made of one of the following materials: foam, ceramic, mica, and aerogel. All of these materials have extremely high melting points or decomposition temperatures, effectively resisting the high-temperature ejections generated during thermal runaway of the battery 10 and preventing self-melting failure. Simultaneously, these materials have extremely low thermal conductivity, effectively blocking heat transfer to the heat exchange plate 21 and preventing the flow channel 214 from melting due to overheating, thus avoiding the risk of coolant leakage.

[0044] <Example Electrical Equipment> This utility model embodiment also provides an electrical device 200, which may include the battery pack 100 described above.

[0045] By way of example only, electrical equipment 200 can be, but is not limited to, vehicles, ships, aircraft, household appliances, and industrial equipment. For example, vehicles can be passenger cars, trucks, construction vehicles, etc.

[0046] In addition, the electrical equipment 200 can also be used for the storage, conversion and release of recyclable electrical energy.

[0047] In a non-restrictive example, refer to Figure 10 The electrical equipment 200 can be an electric vehicle 200, and the battery pack 100 can be used as a power source to provide power to the electric vehicle 200.

[0048] It should be noted that the elements described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0049] It should be understood that multiple components and / or parts can be provided by a single integrated component or part. Alternatively, a single integrated component or part can be divided into multiple separate components and / or parts. The use of the public designation "a" or "an" to describe a component or part does not imply the exclusion of other components or parts.

[0050] The basic principles of this disclosure have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this disclosure are merely examples and not limitations, and should not be considered as essential features of each embodiment of this disclosure. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the scope of this disclosure to the necessity of employing the aforementioned specific details for implementation.

[0051] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A battery pack, characterized in that, include: The battery is equipped with an explosion-proof valve; and The housing, which houses the battery, includes a heat exchange plate and a bottom protective plate. The heat exchange plate supports the battery and includes an exhaust port located below the explosion-proof valve. The bottom protective plate is located below the heat exchange plate and forms an exhaust space between the bottom protective plate and the heat exchange plate. When the battery fails thermally, the ejected material from the explosion-proof valve enters the exhaust space through the exhaust port. The vent hole has a protective element on its edge, which covers at least a portion of the edge.

2. The battery pack according to claim 1, characterized in that, The protective component includes a body portion that continuously covers the entire circumference of the vent hole along its circumference.

3. The battery pack according to claim 2, characterized in that, The heat exchange plate is provided with a flow channel. The orthographic projection of the battery on the heat exchange plate partially overlaps with the flow channel. The distance from the edge of the hole to the flow channel is D1, in mm. The distance from the inner periphery of the body to the edge of the hole is D2, in mm. 0.01≤D2 / D1≤2.

4. The battery pack according to claim 3, characterized in that, 1mm≤D1≤10mm, and / or, 0.1mm≤D2≤2mm.

5. The battery pack according to claim 2, characterized in that, The protective component also includes an upper part connected to the top of the body portion, the upper part extending upward and protruding beyond the edge of the hole.

6. The battery pack according to claim 5, characterized in that, The height of the upper part extending beyond the edge of the hole is H1, in mm, and the thickness of the edge of the hole is T1, in mm, where 0.01 ≤ H1 / T1 ≤ 2.

7. The battery pack according to claim 6, characterized in that, 0.1mm≤H1≤2mm, and / or, 1mm≤T1≤10mm.

8. The battery pack according to claim 5, characterized in that, The upper portion extends outward beyond the edge of the hole and covers at least a portion of the top surface of the heat exchange plate.

9. The battery pack according to claim 8, characterized in that, The heat exchange plate is provided with a flow channel. The orthographic projection of the battery on the heat exchange plate partially overlaps with the flow channel. The distance from the edge of the hole to the flow channel is D1, in mm. The distance from the outer periphery of the upper part to the edge of the hole is D3, in mm. 0.1≤D3 / D1≤10.

10. The battery pack according to claim 9, characterized in that, 1mm≤D3≤10mm.

11. The battery pack according to claim 2, characterized in that, The protective component also includes a lower portion connected to the bottom end of the main body, the lower portion extending downward and protruding beyond the edge of the hole.

12. The battery pack according to claim 11, characterized in that, The height of the lower part extending beyond the edge of the hole is H2, in mm, and the thickness of the edge of the hole is T1, in mm, where 0.01 ≤ H2 / T1 ≤ 2.

13. The battery pack according to claim 12, characterized in that, 0.1mm≤H2≤2mm.

14. The battery pack according to claim 11, characterized in that, The lower portion extends outward beyond the edge of the hole and covers at least a portion of the bottom surface of the heat exchange plate.

15. The battery pack according to claim 8, characterized in that, The heat exchange plate is provided with a flow channel. The orthographic projection of the battery on the heat exchange plate partially overlaps with the flow channel. The distance from the edge of the hole to the flow channel is D1 in mm. The distance from the lower outer periphery to the edge of the hole is D4 in mm. 0.1≤D4 / D1≤1.

16. The battery pack according to claim 9, characterized in that, 1mm≤D4≤10mm.

17. The battery pack according to claim 2, characterized in that, The protective component further includes an upper part connected to the top end of the main body and a lower part connected to the bottom end of the main body. The upper part extends upward and protrudes beyond the edge of the hole, the lower part extends downward and protrudes beyond the edge of the hole, the upper part extends outward beyond the edge of the hole, and the lower part extends outward beyond the edge of the hole. The height of the upper part beyond the edge of the hole is H1 (in mm), the height of the lower part beyond the edge of the hole is H2 (in mm), the distance from the outer periphery of the upper part to the edge of the hole is D3 (in mm), and the distance from the outer periphery of the lower part to the edge of the hole is D4 (in mm). H1 < H2, D3 < D4.

18. The battery pack according to claim 1, characterized in that, The hole edge includes a monolithic shape surrounded by two straight segments and two arc segments. The protective member includes two protective parts, which respectively cover the two straight segments and expose the two arc segments.

19. The battery pack according to any one of claims 1 to 18, characterized in that, The material of the protective component is selected from one of foam, ceramic, mica and aerogel.

20. An electrical appliance, characterized in that, Includes the battery pack according to any one of claims 1 to 19.

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