Supporting plate, battery assembly and electric equipment

Abstract

The utility model discloses a supporting plate of a battery assembly, the battery assembly and electric equipment. The supporting plate is suitable for being arranged between the battery and the outer shell, a second anti-explosion hole is formed in the supporting plate, the supporting plate is further provided with an exhaust channel, and the depth of the exhaust channel becomes deep from shallow in the direction close to the second anti-explosion hole. The exhaust channel is formed in the supporting plate, the depth of the exhaust channel is increased from shallow to deep in the direction close to the second anti-explosion hole, so that gas can be guided to the second anti-explosion hole, gas circulation is facilitated, the pressure at the second anti-explosion hole can be increased, the gas can conveniently break through the anti-explosion valve, and the anti-explosion effect is improved. And therefore, the battery is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a support plate, a battery assembly and electrical equipment. Background Art

[0002] In the related art, since the structural strength of the support plate is relatively large, it usually plays a supporting and heat dissipating role. When the battery generates a large amount of high-temperature gas due to thermal runaway, the structure of the support plate will affect the discharge of the high-temperature gas from the explosion-proof valve set on the support plate. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a support plate, which can guide the gas to the second explosion-proof hole to facilitate the flow of the gas, and can increase the pressure at the second explosion-proof hole to facilitate the gas to break through the explosion-proof valve and then be discharged to the outside of the outer shell, thereby protecting the battery.

[0004] The utility model further provides a battery assembly.

[0005] The utility model further provides an electrical device.

[0006] The support plate according to the utility model includes: the support plate is suitable for being arranged between the battery and the outer shell, the support plate is provided with a second explosion-proof hole, and the support plate is also provided with an exhaust channel, and the depth of the exhaust channel changes from shallow to deep in the direction approaching the second explosion-proof hole.

[0007] According to the support plate of the utility model, an exhaust channel is provided on the support plate, and the depth of the exhaust channel changes from shallow to deep in the direction close to the second explosion-proof hole. In this way, the gas can be guided to the second explosion-proof hole to facilitate the circulation of the gas, and the pressure at the second explosion-proof hole can be increased to facilitate the gas to break through the explosion-proof valve and then be discharged to the outside of the outer shell, thereby protecting the battery.

[0008] In some examples of the present invention, the bottom surface of the exhaust channel forms an inclined slope from the direction away from the second explosion-proof hole to the direction adjacent to the second explosion-proof hole, and the depth of the exhaust channel away from the second explosion-proof hole is less than the depth of the exhaust channel adjacent to the second explosion-proof hole; or the exhaust channel includes: a first section and a second section, relative to the first section, the second section is arranged adjacent to the second explosion-proof hole, and the depth of the second section is greater than the depth of the first section.

[0009] In some examples of the present invention, from the direction away from the second explosion-proof hole to the direction adjacent to the second explosion-proof hole, the exhaust channel is constructed in a straight line, a curve or a broken line type, and along the cross-section perpendicular to the surface of the exhaust channel, the cross-sectional shape of the exhaust channel is trapezoidal, square, semicircular or irregular.

[0010] In some examples of the present invention, there is one exhaust channel, which is located on one side of the second explosion-proof hole; or the exhaust channel extends from one end of the support plate to the other end of the support plate, and the second explosion-proof hole is arranged adjacent to the exhaust channel.

[0011] In some examples of the present invention, there are multiple exhaust channels, and the multiple exhaust channels are arranged at intervals on one side of the second explosion-proof hole; or the multiple exhaust channels are respectively arranged on both sides of the second explosion-proof hole.

[0012] In some examples of the present invention, the second explosion-proof hole is suitable for being arranged opposite to the first explosion-proof hole on the outer shell, the area of ​​the first explosion-proof hole is s1, the area of ​​the second explosion-proof hole is s2, and the relationship between s1 and s2 is: 0.2≤s2 / s1≤1.2.

[0013] In some examples of the present invention, the maximum depth of the exhaust channel is h1, the dimension of the support plate in the thickness direction is h2, and the relationship between h1 and h2 is: 0.05≤h1 / h2≤0.95, 0.1mm<h2<15mm.

[0014] In some examples of the present invention, a vent hole is further provided on the support plate, and the vent hole is connected to the exhaust channel; or the vent hole is provided adjacent to the exhaust channel.

[0015] The battery assembly according to the utility model comprises: a battery; an outer shell; and the support plate mentioned above, wherein the support plate is arranged between the battery and the outer shell, and the exhaust passage faces one side of the outer shell.

[0016] In some examples of the present invention, the dimension of the exhaust channel in the length direction is L1, the dimension of the support plate in the length direction is L2, the dimension of the battery in the length direction is L3, and the relationship between L1, L2 and L3 is: L1≤L2≤L3.

[0017] In some examples of the present invention, the area of ​​the first explosion-proof hole is s1, the area of ​​the side of the support plate adjacent to the battery is s3, the area of ​​the side of the battery adjacent to the support plate is s4, and the relationship between s1, s3 and s4 is: 0.02≤s1 / s4≤0.5, 0.5≤s3 / s4≤1.

[0018] In some examples of the present invention, the support plate is at least arranged on one side in the width direction of the battery, and the second explosion-proof hole is at least arranged on the support plate on one side in the width direction of the battery.

[0019] In some examples of the present invention, the battery assembly further includes: an explosion-proof valve, wherein the explosion-proof valve is disposed at the first explosion-proof hole.

[0020] The electric equipment according to the utility model comprises: the battery assembly mentioned above.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 is an exploded view of a battery assembly according to an embodiment of the utility model;

[0024] Figure 2 is a structural schematic diagram of the support plate;

[0025] Figure 3 is a cross-sectional view of the support plate.

[0026] Reference numerals:

[0027] 10. Outer shell; 11. First explosion-proof hole; 20. Support plate; 21. Second explosion-proof hole; 22. Exhaust channel; 23. Vent hole; 2. Battery; 3. Battery assembly. DETAILED DESCRIPTION

[0028] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0029] Reference below Figure 1-Figure 3 The support plate 20 according to the embodiment of the present invention is described below. The support plate 20 is usually arranged outside the battery 2 to mainly protect the battery 2.

[0030] like Figure 1 As shown, the support plate 20 according to the embodiment of the utility model comprises: an outer shell 10 and a support plate 20. The outer shell 10 mainly serves to form the outer structure of the support plate 20, and can protect the battery 2. The support plate 20 mainly serves to support.

[0031] like Figure 1As shown, a first explosion-proof hole 11 is provided on the outer shell 10. The first explosion-proof hole 11 mainly serves to exhaust gas. The first explosion-proof hole 11 is provided on the outer shell 10, which is more reasonable. The gas generated by the battery 2 in the outer shell 10 can be discharged to the outside of the outer shell 10 through the first explosion-proof hole 11, thereby improving the safety of the battery 2.

[0032] like Figure 1-Figure 3 As shown, a second explosion-proof hole 21 is provided on the support plate 20, and the second explosion-proof hole 21 is arranged opposite to the first explosion-proof hole 11, and the support plate 20 is suitable for being provided with an exhaust channel 22 on one side facing the outer shell 10, and the depth of the exhaust channel 22 changes from shallow to deep in the direction close to the second explosion-proof hole 21. Similarly, the second explosion-proof hole 21 also mainly plays the role of exhaust. The second explosion-proof hole 21 is arranged opposite to the first explosion-proof hole 11. It should be noted that the support plate 20 is directly connected to the battery 2, that is, the support plate 20 is arranged between the battery 2 and the outer shell 10, so that the gas generated by the battery 2 usually needs to pass through the support plate 20 first and then be discharged from the outer shell 10. Therefore, the second explosion-proof hole 21 is arranged opposite to the first explosion-proof hole 11, and such an arrangement is more reasonable. The gas generated by the battery 2 can be directly discharged from the first explosion-proof hole 11 after passing through the second explosion-proof hole 21, thereby increasing the speed of gas discharge.

[0033] The exhaust channel 22 mainly plays the role of guiding the flow of gas. The exhaust channel 22 is arranged on the side of the support plate 20 that is suitable for facing the outer shell 10. This arrangement is more reasonable and can make the exhaust channel 22 closer to the first explosion-proof hole 11, so that the gas can be directly discharged from the first explosion-proof hole 11 after being guided by the exhaust channel 22. In the direction close to the second explosion-proof hole 21, the depth of the exhaust channel 22 changes from shallow to deep, that is, the depth of the exhaust channel 22 at different positions is different. Specifically, the closer the exhaust channel 22 is to the second explosion-proof hole 21, the deeper the depth is, and the farther the exhaust channel 22 is from the second explosion-proof hole 21, the shallower the depth is. In this way, the exhaust channel 22 can store more gas at a position close to the second explosion-proof hole 21, thereby increasing the pressure at the second explosion-proof hole 21, making it easier for the gas to break through the explosion-proof valve and then be discharged to the outside of the outer shell 10.

[0034] Therefore, by setting the exhaust channel 22 on the support plate 20, and the depth of the exhaust channel 22 changes from shallow to deep in the direction approaching the second explosion-proof hole 21, the gas can be guided to the second explosion-proof hole 21, which is convenient for the circulation of the gas, and the pressure at the second explosion-proof hole 21 can be increased, which is convenient for the gas to break through the explosion-proof valve and then be discharged to the outside of the outer shell 10, thereby protecting the battery 2.

[0035] In addition, if Figure 2 and Figure 3As shown, from the direction away from the second explosion-proof hole 21 to the direction adjacent to the second explosion-proof hole 21, the bottom surface of the exhaust channel 22 forms an inclined slope, the depth of the exhaust channel 22 away from the second explosion-proof hole 21 is less than the depth of the exhaust channel 22 adjacent to the second explosion-proof hole 21, or the exhaust channel 22 includes: a first section and a second section, relative to the first section, the second section is arranged adjacent to the second explosion-proof hole 21, and the depth of the second section is greater than the depth of the first section. That is to say, the cross-sectional shape of the exhaust channel 22 in the depth direction can have a variety of structural forms. For example: in the direction away from the second explosion-proof hole 21 to the direction adjacent to the second explosion-proof hole 21, the bottom surface of the exhaust channel 22 forms an inclined surface inclined toward the side away from the outer shell 10, that is, in the direction adjacent to the second explosion-proof hole 21, the depth of the exhaust channel 22 is continuously increased, which can make the flow of gas smoother and facilitate the flow of gas.

[0036] Alternatively, the exhaust passage 22 may be divided into several sections, for example, when the exhaust passage 22 is set to two sections, the first section is set away from the second explosion-proof hole 21, the second section is set close to the second explosion-proof hole 21, and the depth of the second section is greater than the depth of the first section. It should be noted that the depths at the first section are the same and the depths at the second section are also the same, that is, the first section and the second section can form a stepped structure.

[0037] In addition, if Figure 1-Figure 3 As shown, from the direction away from the second explosion-proof hole 21 to the direction adjacent to the second explosion-proof hole 21, the exhaust channel 22 is constructed in a straight line, a curve or a broken line. When viewed along a cross section perpendicular to the surface of the exhaust channel 22, the cross-sectional shape of the exhaust channel 22 is a trapezoid, a square, a semicircle or a special shape. In other words, the exhaust channel 22 can be in a variety of structural shapes. For example, the exhaust channel 22 can be constructed in a straight line, so that the length of the exhaust channel 22 can be relatively as small as possible, thereby shortening the flow path of the gas and facilitating the rapid discharge of the gas. The exhaust channel 22 can also be constructed in a curve or a broken line, so that the flow path of the exhaust channel 22 on the support plate 20 can be relatively increased, so that more gas can enter the exhaust channel 22, thereby facilitating the guidance of the gas. Of course, the exhaust channel 22 can also be in other suitable shapes.

[0038] In addition, viewed from a cross section perpendicular to the surface of the exhaust channel 22, the cross-sectional shape of the exhaust channel 22 can be constructed in a variety of shapes, for example, the cross-sectional shape of the exhaust channel 22 can be trapezoidal, square or semicircular. Of course, the cross-sectional shape of the exhaust channel 22 can also be other suitable shapes.

[0039] Furthermore, if Figure 1As shown, there is one exhaust channel 22, and the exhaust channel 22 is located on one side of the second explosion-proof hole 21, or the exhaust channel 22 extends from one end of the support plate 20 to the other end of the support plate 20, and the second explosion-proof hole 21 is arranged adjacent to the exhaust channel 22. In other words, the number of the exhaust channel 22 can be one, and when the number of the exhaust channel 22 is one, the exhaust channel 22 can be arranged only on one side of the second explosion-proof hole 21, so that the exhaust channel 22 can guide the heat generated on one side of the battery 2.

[0040] Alternatively, both ends of the exhaust channel 22 may extend to both sides of the support plate 20, that is, both ends of the exhaust channel 22 are located on both sides of the second explosion-proof hole 21, so that the depth of the exhaust channel 22 near the second explosion-proof hole 21 is deeper, and the depth of the exhaust channel 22 away from both ends of the second explosion-proof hole 21 is relatively shallow. It should be noted that in order to shorten the exhaust path of the gas in the battery 2, the second explosion-proof hole 21 is usually set near the middle of the support plate 20.

[0041] In addition, there are multiple exhaust channels 22, and the multiple exhaust channels 22 are arranged at intervals on one side of the second explosion-proof hole 21; and / or the multiple exhaust channels 22 are respectively arranged on both sides of the second explosion-proof hole 21. In other words, the number of exhaust channels 22 can also be multiple, and multiple exhaust channels 22 are arranged, so that the guiding area of ​​the exhaust channels 22 can be increased, so that more gas can enter the exhaust channels 22, which is convenient for gas circulation, and the amount of gas in the exhaust channels 22 close to the second explosion-proof hole 21 can be increased, so that the air pressure at the second explosion-proof hole 21 can be increased, which is convenient for breaking the explosion-proof valve.

[0042] A plurality of exhaust channels 22 are arranged at intervals on one side of the second explosion-proof hole 21, so that the plurality of exhaust channels 22 can be arranged on one side of the second explosion-proof hole 21 more comprehensively and reasonably, and while the gas on one side of the second explosion-proof hole 21 is quickly and comprehensively guided, interference between adjacent exhaust channels 22 can be avoided. Alternatively, a plurality of exhaust channels 22 are arranged on both sides of the second explosion-proof hole 21, so that the plurality of exhaust channels 22 can be arranged on the support plate 20 more comprehensively, so that the heat generated by the battery 2 can be comprehensively and quickly guided. Moreover, interference between adjacent exhaust channels 22 can also be avoided.

[0043] In addition, if Figure 1As shown, the area of ​​the first explosion-proof hole 11 is s1, the area of ​​the second explosion-proof hole 21 is s2, and the relationship between s1 and s2 is: 0.2≤s2 / s1≤1.2. In other words, the ratio of the second explosion-proof hole 21 to the first explosion-proof hole 11 needs to meet a certain range, and the ratio of the second explosion-proof hole 21 to the first explosion-proof hole 11 needs to be greater than or equal to 0.2, so as to avoid the first explosion-proof hole 11 being too large relative to the second explosion-proof hole 21, affecting the flow rate of the gas at the first explosion-proof hole 11. The ratio of the second explosion-proof hole 21 to the first explosion-proof hole 11 also needs to be less than or equal to 1.2, so as to avoid the second explosion-proof hole 21 being too large relative to the first explosion-proof hole 11, so that the first explosion-proof hole 11 will hinder the flow of the gas flowing out of the second explosion-proof hole 21. It should be noted that when the ratio of the second explosion-proof hole 21 to the first explosion-proof hole 11 is 1, that is, when the area of ​​the second explosion-proof hole 21 is the same as that of the first explosion-proof hole 11, the effect is best.

[0044] Furthermore, the maximum depth of the exhaust channel 22 is h1, the dimension of the support plate 20 in the thickness direction is h2, and the relationship between h1 and h2 is: 0.05≤h1 / h2≤0.95, 0.1mm<h2<15mm. In other words, the thickness of the support plate 20 needs to meet a certain range, that is, the thickness of the support plate 20 needs to be greater than 0.1mm, so that the support plate 20 can have good structural strength and can better support the battery 2. The thickness of the support plate 20 also needs to be less than 15mm, so as to avoid excessive strength of the support plate 20, resulting in material waste, and also increasing the weight of the support plate 20.

[0045] At the same time, the ratio between h1 and h2 also needs to meet a certain range, that is, h1 / h2 needs to be greater than or equal to 0.05, so as to avoid the exhaust channel 22 being too shallow, which will affect the gas diversion effect. h1 / h2 also needs to be less than or equal to 0.95, so as to avoid the exhaust channel 22 being too deep, thereby affecting the structural strength of the support plate 20.

[0046] In addition, if Figure 1-Figure 3As shown, a vent 23 is also provided on the support plate 20, and the vent 23 is connected to the exhaust channel 22; or the vent 23 is arranged adjacent to the exhaust channel 22. Among them, the vent 23 mainly plays the role of ventilation. The vent 23 is arranged on the support plate 20, so that the gas generated by the battery 2 can be discharged to the side of the support plate 20 facing the outer shell 10 through the vent 23, so as to be discharged from the first explosion-proof hole 11. Specifically, when the vent 23 is connected to the exhaust channel 22, the gas discharged from the vent 23 can be directly guided to the first explosion-proof hole 11 through the exhaust channel 22, so as to facilitate the guidance of the gas. Of course, the vent 23 can also be arranged adjacent to the exhaust channel 22, so that the gas discharged from the vent 23 can be quickly passed into the exhaust channel 22, and then guided to the first explosion-proof hole 11 by the exhaust channel 22 for discharge.

[0047] The battery assembly 3 according to the embodiment of the utility model comprises: a battery 2 and the support plate 20 described in the above embodiment, wherein the support plate 20 is arranged between the battery 2 and the outer shell 10. The support plate 20 is arranged between the battery 2 and the outer shell 10, so that the support plate 20 can be fixed, making the arrangement of the support plate 20 more secure and stable, and the support plate 20 can better support the battery 2.

[0048] In addition, if Figure 1 As shown, the dimension of the exhaust channel 22 in the length direction is L1, the dimension of the support plate 20 in the length direction is L2, and the dimension of the battery 2 in the length direction is L3. The relationship between L1, L2 and L3 is: L1≤L2≤L3. In other words, the length of the support plate 20 needs to meet a certain range, that is, the length of the support plate 20 must be greater than or equal to the length of the exhaust channel 22, which is convenient for the setting of the exhaust channel 22 and can provide a larger space for the setting of the exhaust channel 22. At the same time, it can also ensure that the length of the support plate 20 can meet the support requirements for the battery 2. The length of the support plate 20 also needs to be less than or equal to the length of the battery 2, which can avoid the length of the support plate 20 being too long, resulting in material waste and increasing the volume and weight of the battery assembly 3.

[0049] In addition, if Figure 1As shown, the area of ​​the first explosion-proof hole 11 is s1, the area of ​​the side of the support plate 20 adjacent to the battery 2 is s3, and the area of ​​the side of the battery 2 adjacent to the support plate 20 is s4. The relationship between s1, s3 and s4 is: 0.02≤s1 / s4≤0.5, 0.5≤s3 / s4≤1. In other words, the ratio between the area of ​​the first explosion-proof hole 11 and the area of ​​the side of the battery 2 adjacent to the support plate 20 needs to meet a certain range, that is, s1 / s4 needs to be greater than or equal to 0.02, so as to avoid the first explosion-proof hole 11 being too small relative to the area of ​​the side of the battery 2 adjacent to the support plate 20, hindering the discharge of gas, so that the internal gas can be discharged smoothly. s1 / s4 also needs to be less than or equal to 0.5, so as to avoid the first explosion-proof hole 11 being too large relative to the area of ​​the side of the battery 2 adjacent to the support plate 20, which affects the overall structural strength of the support plate 20.

[0050] Similarly, the ratio of the area of ​​the side of the support plate 20 adjacent to the battery 2 to the area of ​​the side of the battery 2 adjacent to the support plate 20 also needs to meet a certain range, that is, s3 / s4 needs to be greater than or equal to 0.5, so as to avoid the area of ​​the side of the support plate 20 adjacent to the battery 2 being too small, making it difficult to support the battery 2. s3 / s4 also needs to be less than or equal to 1, so as to avoid the area of ​​the side of the support plate 20 adjacent to the battery 2 being too large, resulting in material waste and increasing the volume and weight of the battery assembly 3.

[0051] Furthermore, if Figure 1 As shown, the support plate 20 is at least arranged on one side in the width direction of the battery 2, and the second explosion-proof hole 21 is at least arranged on the support plate 20 on one side in the width direction of the battery 2. In other words, the number of the support plate 20 is at least one, and the support plate 200 is arranged on the side in the width direction of the battery 2, so that the support plate 200 can better support the battery 2, making the arrangement of the battery 2 more secure and stable, and the battery 2 can work better. The second explosion-proof hole 21 is at least arranged on the support plate 20 on one side in the width direction of the battery 2, that is, the second explosion-proof hole 21 can be arranged on the support plate 20 on one side, or the second explosion-proof hole 21 can be arranged on the support plates 20 on both sides at the same time. It should be noted that the explosion-proof hole on the support plate 20 can be one or more, and the arrangement of multiple explosion-proof holes can speed up the gas discharge speed.

[0052] It should be noted that the support plates 20 are respectively arranged on both sides of the width direction of the battery 2. Compared with setting the support plates 20 on both sides of the length direction of the battery 2, the positions of the first explosion-proof hole 11 and the second explosion-proof hole 21 are closer to the middle position of the battery 2, thereby shortening the gas discharge path and facilitating the gas discharge.

[0053] In addition, the battery assembly 3 also includes an explosion-proof valve, which is arranged at the first explosion-proof hole 11. Among them, the explosion-proof valve mainly plays a sealing role. The explosion-proof valve is arranged at the first explosion-proof hole 11, which is more reasonable. When the battery 2 is working normally, the explosion-proof valve can prevent external impurities from entering the interior of the outer shell 10 through the first explosion-proof hole 11. When the battery 2 has a thermal runaway and produces a large amount of gas, a large amount of gas will be concentrated at the explosion-proof valve through the exhaust channel 22. When the pressure at the explosion-proof valve reaches a certain value, the gas will break through the explosion-proof valve, so that the gas inside the outer shell 10 can be discharged, thereby protecting the battery 2.

[0054] It should be noted that the exhaust channel 22 can be constructed in the form of a groove structure or a notch structure, and when the length of the support plate 20 is less than the length of the battery 2, the gas generated by the battery 2 at the part not covered by the support plate 20 will be directly guided by the exhaust channel 22 to the first explosion-proof hole 11.

[0055] As an optional embodiment, a notch can be provided at the position of the first explosion-proof hole 11 on the outer shell 10 to replace the design of the first explosion-proof hole 11. Since the structural strength at the notch is less than the structural strength at a location without a notch, when the gas pressure concentrated at the notch reaches a certain value, the structure at the notch can be broken through, thereby discharging the gas.

[0056] The electrical equipment according to the embodiment of the utility model includes: the battery assembly 3 described in the above embodiment.

[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0058] In the description of the present utility model, "first feature" and "second feature" may include one or more of the features. In the description of the present utility model, "plurality" means two or more. In the description of the present utility model, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. In the description of the present utility model, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0060] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A support plate (20), characterized in that: The support plate (20) is suitable for being arranged between the battery (2) and the outer shell (10), the support plate (20) is provided with a second explosion-proof hole (21), and the support plate (20) is also provided with an exhaust channel (22), and the depth of the exhaust channel (22) increases from shallow to deep in a direction approaching the second explosion-proof hole (21).

2. A support plate (20) according to claim 1, characterized in that: From a direction away from the second explosion-proof hole (21) to a direction adjacent to the second explosion-proof hole (21), the bottom surface of the exhaust passage (22) forms an inclined slope, and the depth of the exhaust passage (22) away from the second explosion-proof hole (21) is smaller than the depth of the exhaust passage (22) adjacent to the second explosion-proof hole (21); or The exhaust passage (22) comprises a first section and a second section. Relative to the first section, the second section is arranged adjacent to the second explosion-proof hole (21), and the depth of the second section is greater than the depth of the first section.

3. A support plate (20) according to claim 1, characterized in that: From the direction away from the second explosion-proof hole (21) to the direction adjacent to the second explosion-proof hole (21), the exhaust passage (22) is constructed in a straight line, a curve or a broken line shape, and along a cross section perpendicular to the surface of the exhaust passage (22), the cross-sectional shape of the exhaust passage (22) is a trapezoid, a square, a semicircle or a special shape.

4. A support plate (20) according to claim 3, characterized in that: There is one exhaust passage (22), and the exhaust passage (22) is located on one side of the second explosion-proof hole (21); or The exhaust passage (22) extends from one end of the support plate (20) to the other end of the support plate (20), and the second explosion-proof hole (21) is arranged adjacent to the exhaust passage (22).

5. A support plate (20) according to claim 3, characterized in that: There are a plurality of exhaust passages (22), and the plurality of exhaust passages (22) are arranged at intervals on one side of the second explosion-proof hole (21); or The plurality of exhaust passages (22) are respectively arranged on both sides of the second explosion-proof hole (21).

6. A support plate (20) according to claim 1, characterized in that: The second explosion-proof hole (21) is suitable for being arranged opposite to the first explosion-proof hole (11) on the outer shell (10), the area of ​​the first explosion-proof hole (11) is s1, the area of ​​the second explosion-proof hole (21) is s2, and the relationship between s1 and s2 is: 0.2≤s2 / s1≤1.

2.

7. A support plate (20) according to claim 1, characterized in that: The maximum depth of the exhaust channel (22) is h1, the dimension of the support plate (20) in the thickness direction is h2, and the relationship between h1 and h2 is: 0.05≤h1 / h2≤0.95, 0.1mm<h2<15mm.

8. A support plate (20) according to claim 1, characterized in that: The support plate (20) is further provided with a vent hole (23), and the vent hole (23) is connected to the exhaust channel (22); or The vent hole (23) is arranged adjacent to the exhaust passage (22).

9. A battery assembly (3), characterized in that: include: Batteries (2); An outer shell (10); The support plate (20) according to any one of claims 1 to 8, wherein the support plate (20) is arranged between the battery (2) and the outer shell (10), and the exhaust channel (22) faces one side of the outer shell (10).

10. A battery assembly (3) according to claim 9, characterized in that: The exhaust channel (22) has a length dimension L1, the support plate (20) has a length dimension L2, the battery (2) has a length dimension L3, and the relationship among L1, L2 and L3 is: L1≤L2≤L3.

11. A battery assembly (3) according to claim 9, characterized in that: The outer shell (10) is provided with a first explosion-proof hole (11), the area of ​​the first explosion-proof hole (11) is s1, the area of ​​the side of the support plate (20) adjacent to the battery (2) is s3, the area of ​​the side of the battery (2) adjacent to the support plate (20) is s4, and the relationship between s1, s3 and s4 is: 0.02≤s1 / s4≤0.5, 0.5≤s3 / s4≤1.

12. A battery assembly (3) according to claim 9, characterized in that: The support plate (20) is at least arranged on one side of the battery (2) in the width direction, and the second explosion-proof hole (21) is at least arranged on the support plate (20) on one side of the battery (2) in the width direction.

13. A battery assembly (3) according to claim 9, characterized in that: Also includes: An explosion-proof valve, wherein the outer shell (10) is provided with a first explosion-proof hole (11), and the explosion-proof valve is arranged at the first explosion-proof hole (11).

14. An electrical device, characterized in that: include: The battery assembly (3) according to any one of claims 9 to 13.

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