Battery pack supporting structure, battery pack and electric equipment

Abstract

The utility model discloses a battery pack supporting structure, a battery pack and electric equipment. The battery pack supporting structure comprises a supporting part and a liquid guide structure, the supporting part is used for supporting a battery cell structure, the liquid guide structure is arranged on the edge of the supporting part and used for guiding out liquid in the battery pack supporting structure, the liquid guide structure comprises a groove, a flow guide plate and a liquid phase valve, and the groove is located in one side of a battery cell anti-explosion valve; the guide plate is arranged in the groove, is in a shape with a high middle part and two low sides along the length direction of the groove, and can guide liquid in the groove to two ends of the groove; liquid phase valves are arranged at the two ends of the groove, and when liquid at the two ends accumulates and the liquid pressure reaches the opening threshold value of the liquid phase valves, the valve cover is opened to discharge the liquid. The battery pack supporting structure is provided with the liquid guide structure, so that water in the battery pack or an electrolyte sprayed under the condition of thermal runaway can be converged and guided out, the probability that parts are corroded by the water is reduced, and the arc discharge phenomenon caused by the electrolyte is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a battery pack support structure, a battery pack and an electrical device. Background Art

[0002] At present, developed countries in the world are developing new energy vehicles. As the main power source of new energy vehicles, lithium-ion power batteries have attracted extensive attention for their safety performance. On the one hand, my country has frequent rainstorms in summer. If there is water accumulation in the battery pack, it will not only corrode the components in the battery pack, but also seriously affect the performance of the battery pack if the water is not drained in time.

[0003] On the other hand, it is well known that when the battery loses control, a large amount of electrolyte will be ejected from the explosion-proof valve 11, accompanied by high-temperature steam, which is highly flammable; at the same time, the electrolyte will condense and scatter in the battery pack, causing the internal metal parts to be charged, which is very likely to cause arcing. In order to achieve a comprehensive safety design, in addition to conventional insulation protection, the electrolyte must be discharged from the pack to reduce secondary safety problems caused by electrolyte overlap. Utility Model Content

[0004] The utility model aims to solve at least one of the above-mentioned technical problems in the prior art to a certain extent. In a first aspect, the utility model proposes a battery pack support structure 2 for a battery pack, and optionally, the battery pack support structure 2 comprises:

[0005] A support portion 21, wherein the support portion 21 is used to support the battery cell 10;

[0006] The liquid-conducting structure 22 is disposed at the edge of the supporting portion 21 . The liquid-conducting structure 22 includes a groove 30 . The groove 30 is used to conduct liquid in the battery pack supporting structure 2 .

[0007] Optionally, the groove 30 includes a bottom surface 303, and a first end surface 301 and a second end surface 302 that are relatively arranged, the bottom surface 303 is arranged at a preset angle with the first end surface 301 and the second end surface 302, the first end surface 301 is close to the center of the battery pack support structure 2, and the first end surface 301 has a first contact line 3011 on the side close to the battery cell 10, and the first contact line 3011 is flush with the pole end surface of the battery cell 10.

[0008] Optionally, the groove 30 is disposed on one side of the explosion-proof valve 11 , the groove 30 is disposed along the direction in which the explosion-proof valves 11 are arranged, and the explosion-proof valve 11 is close to the groove 30 .

[0009] Optionally, the first end surface 301 and / or the second end surface 302 is a slope surface or a curved surface.

[0010] Optionally, the depth of the groove 30 is 10 mm-15 mm.

[0011] Optionally, the width of the bottom surface 303 is 5 mm-15 mm.

[0012] Optionally, the liquid guiding structure 22 includes a guide plate 31 , and the guide plate 31 is disposed on the bottom surface 303 . The guide plate 31 is high in the middle and low at both ends along the length direction of the groove 30 .

[0013] Optionally, the height of the guide plate 31 is one third to two thirds of the depth of the groove 30 , and the length of the guide plate 31 is equal to the length of the groove 30 .

[0014] Optionally, the guide plate 31 and the groove 30 are integrally formed.

[0015] Optionally, the liquid guiding structure 22 includes a liquid phase valve 40, which is disposed at least at one end of the groove 30, and the liquid phase valve 40 is suitable for discharging liquid from the battery pack support structure 2 when the liquid pressure reaches a predetermined threshold.

[0016] Optionally, the liquid guiding structure 22 includes a liquid phase valve 40, which is arranged at both ends of the groove 30, and the liquid phase valve 40 is suitable for discharging liquid from the battery pack support structure 2 when the liquid pressure at both ends of the groove 30 reaches a predetermined threshold.

[0017] Optionally, the battery pack support structure 2 is configured as a multi-layer structure, the support portion 21 and the liquid guide structure 22 are located in the lower layer of the battery pack support structure 2, and the battery pack support structure 2 also includes a tray 50, which is located above the support portion 21 and is used to support the upper battery cell 10, and the edge of the tray 50 is bent downward to form a guide surface, and the guide surface is located above the groove 30, and is used to guide the liquid in the tray 50 to the groove 30.

[0018] In the second aspect, the present application proposes a battery pack, which includes the battery pack support structure 2 and the multiple battery cells 10 provided in any of the above embodiments, and an explosion-proof valve 11 is arranged on the pole end face of the battery cell 10, and the groove 30 is arranged on one side of the explosion-proof valve 11, which is used to drain the moisture in the battery pack support structure 2 or the electrolyte flowing out of the explosion-proof valve 11.

[0019] In a third aspect, the present application proposes an electrical device, which includes the battery pack and electrical appliance provided in the above embodiments.

[0020] The utility model provides a liquid guiding structure 22 on the inner edge of the battery pack support structure 2, the liquid guiding structure 22 includes a groove 30, the groove 30 is located on one side of the explosion-proof valve 11 of the battery cell 10, and the liquid guiding structure 22 is used to converge and discharge the liquid inside the battery pack. When there is water accumulated inside the battery pack, the groove 30 can converge and discharge the accumulated water. In addition, in the case of thermal runaway of the battery pack, the electrolyte will be sprayed and scattered from the explosion-proof valve 11. Since the groove 30 is located on one side of the explosion-proof valve 11 of the battery cell 10, the electrolyte sprayed from the explosion-proof valve 11 can be largely converged to the groove 30 of the battery pack support structure 2, and the groove 30 then guides the electrolyte to the outside of the battery pack, thereby reducing the probability of arcing caused by the electrolyte. The electrolyte is discharged from the battery pack body in time, which can reduce the secondary safety risks caused by electrolyte overlap. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The battery pack provided by the embodiment of the utility model;

[0022] Figure 2 It is a schematic diagram of a guide plate with a slope provided according to an embodiment of the utility model;

[0023] Figure 3 It is a schematic diagram of a curved guide plate provided according to an embodiment of the utility model;

[0024] Figure 4 It is a structural schematic diagram of a liquid guide plate provided according to an embodiment of the utility model;

[0025] Figure 5 It is a structural schematic diagram of a liquid phase valve provided according to an embodiment of the utility model;

[0026] Figure 6 is a schematic diagram of a multi-layer battery pack support structure provided according to an embodiment of the utility model;

[0027] Figure 7 It is a structural schematic diagram of a tray provided according to an embodiment of the utility model.

[0028] Reference numerals:

[0029] 1-battery pack; 10-battery cell; 11-explosion-proof valve; 2-battery pack support structure; 21-support portion; 22-liquid guide structure; 30-groove; 301-first end surface; 302-second end surface; 303-bottom surface; 3011-first contact line; 31-guide plate; 40-liquid phase valve; 400-first channel; 401-valve cover; 402-second channel; 403-support rod; 404-third channel; 405-spring; 50-tray. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" 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.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Reference Figure 1 As shown, the utility model provides a battery pack support structure 2, the battery pack support structure 2 includes a support portion 21, and the support portion 21 is used to support the battery cell 10 structure;

[0035] The liquid-conducting structure 22 is disposed at the edge of the support portion 21 . The liquid-conducting structure 22 includes a groove 30 . The groove 30 is used to discharge the liquid inside the battery pack support structure 2 .

[0036] When water enters the battery pack 1, the present application sets a liquid guide structure 22 on the inner edge of the battery pack support structure 2. The liquid guide structure 22 includes a groove 30, which can converge the water and discharge it from the battery pack, reducing the water in the battery pack from corroding the components in the battery pack support structure 2, thereby affecting the overall performance of the battery pack. In addition, in the event of thermal runaway, the electrolyte sprays everywhere, which can easily cause the metal parts inside the battery pack support structure 2 to be charged, causing arcing, and causing secondary safety problems. In the present application, the groove 30 is set below the explosion-proof valve 11 of the battery cell 10, and the inner side of the groove 30 is close to the explosion-proof valve 11. In the event of thermal runaway, the electrolyte is sprayed out from the explosion-proof valve 11, and the bottom of the explosion-proof valve 11 is close to the inner side of the groove 30. The sprayed electrolyte can flow into the groove 30, converge through the liquid guide structure 22, and be discharged to the battery pack support structure 2. It is worth noting that the liquid-conducting structure 22 discharges water accidentally entering the battery pack or other waste liquids such as electrolyte sprayed out due to thermal runaway, and is not a certain liquid intentionally provided in the battery pack to achieve a certain function.

[0037] In one embodiment, the groove 30 includes a bottom surface 303, and a first end surface 301 and a second end surface 302 that are arranged opposite to each other. The bottom surface 303 is arranged at a preset angle with the first end surface 301 and the second end surface 302. The first end surface 301 is close to the center of the battery pack support structure 2. The first end surface 301 has a first contact line 3011 close to the battery cell 10, and the first contact line 3011 is flush with the end surface of the pole of the battery cell 10. It can be understood that the first contact line 3011 of the groove 30 coincides with the boundary line between the side surface of the battery cell 10 and the end surface of the pole in the vertical direction, so that there is no other gap between the battery cell 10 and the groove 30, which can effectively reduce the ejected electrolyte or water remaining on the battery shell or the battery pack support structure 2, and maximize the convergence of liquids such as electrolyte into the groove 30.

[0038] In one embodiment, the groove 30 is located on one side of the explosion-proof valve 11 of the battery cell 10, and the groove 30 is arranged along the direction in which the explosion-proof valve 11 is arranged. The side of the battery cell 10 with the explosion-proof valve 11 is close to the groove 30. Specifically, in order to converge the electrolyte ejected from the explosion-proof valve 11, the groove 30 needs to be as close to the explosion-proof valve 11 as possible. The explosion-proof valve 11 is generally arranged on one side of the end face of the pole of the battery cell 10, so the groove 30 can be arranged along the direction in which the explosion-proof valve 11 is arranged. In addition, in order to reduce the electrolyte from being sprayed everywhere and reduce the confluence time, the battery cell 10 with the explosion-proof valve 11 is placed close to the groove 30, which can reduce the electrolyte from being scattered everywhere.

[0039] In one embodiment, the first end surface 301 and / or the second end surface 302 is a slope or a curved surface.

[0040] Specifically, Figure 2As shown, the first end face 301 and / or the second end face of the groove 30 are sloped surfaces, and the upper end face of the slope is in close contact with the end face of the pole of the battery cell 10. An explosion-proof valve 11 is arranged on the end face of the battery cell 10. When the battery pack 1 is thermally runaway, the electrolyte will be sprayed out through the explosion-proof valve 11. The slope of the groove 30 helps to guide the electrolyte sprayed everywhere to the bottom of the groove 30 and discharge it.

[0041] Optionally, when the first end surface and / or the second end surface 302 is an arc surface, the arc surface of the groove 30 also helps the convergence and timely discharge of the liquid.

[0042] Alternatively, if Figure 3 As shown, the longitudinal section of the groove is arc-shaped, which is convenient for the convergence of liquid.

[0043] In one embodiment, the depth of the groove 30 is 10mm-15mm. It is understandable that, considering the protective strength of the battery pack support structure 2 and the fluidity of the liquid, if the groove 30 is too shallow, it will easily cause the liquid to be retained in the groove 30 and difficult to discharge. Therefore, the present application recommends setting the depth of the groove 30 to be greater than or equal to 10mm. In addition, if the groove 30 is too deep, it will affect the protective strength of the battery pack support structure 2. Therefore, the present application recommends setting the depth of the groove 30 to be less than or equal to 15mm. Other schemes comprehensively consider the depth of the groove 30 based on the material and size of the battery pack support structure 2, but it must ensure the fluidity of the liquid while ensuring the protective strength of the battery pack support structure 2.

[0044] In one embodiment, according to the drainage requirement of the battery pack 1, the width of the bottom surface 303 is 5mm-15mm. It is understandable that in the event of thermal runaway of the battery, there may be some solid particles in the ejected electrolyte. If the width of the groove 30 is too narrow, the solid particles will easily block the flow channel, so the width of the groove 30 should be greater than or equal to 5mm. On the other hand, the space of the battery pack structure must also be considered comprehensively. If the groove 30 is too wide, it will affect the placement space of the battery cell 10, and its energy density will be reduced. Therefore, the width of the groove 30 is set to be less than or equal to 15mm. Other schemes can also comprehensively consider the drainage requirements of the battery pack and the space utilization rate, and comprehensively determine the range of the width of the groove 30.

[0045] In one embodiment, if Figure 4As shown, the liquid guide structure 22 includes a guide plate 31, which is arranged on the bottom surface 303 of the groove 30. The guide plate 31 is high in the middle and low at both ends along the length direction of the groove 30, that is, along the length direction of the guide plate 31, the guide plate 31 has a certain slope from the middle to the two ends. At this time, there is water or electrolyte inside the groove 30. If there is no guide plate 31, the water will accumulate inside the battery pack support structure 2 and it will not be easy to discharge in time, or the discharge will not be clean enough and thorough enough, and there will still be some residual water or electrolyte. The residual water or electrolyte will also affect the safety performance of the battery pack. Therefore, the groove 30 of the present application is designed to be high in the middle and low at both ends, and the liquid converging in the groove 30 is guided to the two ends of the groove 30, which is conducive to the liquid converging to the groove 30 to be discharged from the battery pack in time, and reduce the water or electrolyte remaining inside the groove 30.

[0046] In one embodiment, the height of the guide plate 31 is one-third to two-thirds of the depth of the groove 30, and the length of the guide plate 31 is equal to the length of the groove 30. Specifically, the guide plate 31 is high in the middle and low on both sides, and is an isosceles triangle. The guide plate 31 is set on the bottom surface 303 of the groove 30 for diversion. If it is too low, the slope will be insufficient and it will be difficult to divert. If the slope is too high, it will occupy too much space in the groove 30. Considering the space utilization rate, the height of the middle of the guide plate 31 is set to one-third to two-thirds of the depth of the groove 30. In addition, the guide plate 31 is arranged inside the groove 30. When the length of the guide plate 31 is shorter than the length of the groove 30, liquid will accumulate at the end of the guide plate 31. For example, when the length of the guide plate 31 is only one-half of the length of the groove 30, there is still one-quarter of the length at both ends of the groove 30. If the length of the battery pack 1 along the direction of the battery cell 10 is long enough, one-quarter of the length at both ends of the groove 30 is flat without a slope, and the liquid will be retained here and difficult to discharge. Therefore, the present application recommends setting the length of the guide plate 31 to be equal to or slightly less than the length of the groove 30. At this time, the liquid converges at both ends of the groove 30, which is easy to form a large liquid pressure, and the liquid phase valve 40 at both ends of the groove 30 is opened to discharge the liquid in time.

[0047] In one embodiment, the guide plate 31 and the groove 30 are integrally formed. Compared with a structure in which the guide plate 31 is independently and detachably disposed in the groove 30, the integrally formed guide plate 31 and the groove 30 can reduce the situation in which water or electrolyte remains in the gap between the guide plate 31 and the groove 30, and can effectively reduce the corrosion of the residual water or electrolyte to the battery pack components, thereby improving its safety. In addition, the guide plate 31 and the groove 30 are integrally formed, the preparation process is simpler, and the stability of the connection is better.

[0048] In one embodiment, the liquid guiding structure 22 further includes a liquid phase valve 40, which is disposed at the ends of the groove 30. When liquid accumulates at the ends of the groove 30 and its pressure reaches a predetermined threshold, the liquid phase valve 40 is opened to discharge the liquid out of the battery pack support structure 2.

[0049] In one embodiment, the liquid guiding structure 22 includes a liquid phase valve 40, and a guide plate 31 is also provided in the groove 30. The guide plate is set to be higher in the middle and lower on both sides, so as to guide the liquid in the groove to both ends of the groove, which helps the liquid to converge to both ends of the groove. When the amount of liquid is constant, the guide plate helps to increase the liquid pressure at both ends of the groove, making it easier to open the liquid phase valve to discharge the liquid from the battery pack.

[0050] Specifically, Figure 5 As shown, the liquid phase valve 40 is arranged at both ends of the groove 30 along the length direction, and can be directly or indirectly connected to the outside of the battery pack. When the liquid pressure at both ends of the groove 30 reaches a predetermined threshold, the liquid phase valve 40 opens to discharge the liquid to the outside of the battery pack. The liquid phase valve 40 includes three channels, the first channel 400 is connected to the end of the groove 30; the third channel 404 can be directly or indirectly connected to the outside of the battery pack support structure 2; a switch assembly is arranged in the second channel 402, the switch assembly includes a support rod 403, a valve cover 401 connected to the support rod 403, and a spring 405402 arranged outside the support rod 403. The valve cover 401 is arranged on the end face of the second channel 402 close to the first channel 400, and the end face of the second channel 402 away from the first channel 400 is provided with a cover plate. In order to ensure that the liquid phase valve 40 is relatively sealed and prevent foreign impurities and dust from entering, the spring 405 is arranged between the valve cover 401 and the cover plate, and abuts against the cover plate and the valve cover 401.

[0051] The working principle of the liquid phase valve 40 is as follows: when there is no liquid or the amount of liquid in the first channel 400 is small, and its pressure does not reach the threshold value for opening the liquid phase valve 400, the valve cover 401 covers the junction of the second channel 402 and the first channel 400, so that the first channel 400 and the second channel 402 are separated, the liquid phase valve 40 is closed, and the liquid remains in the groove 30. When the liquid in the first channel 400 accumulates and its pressure reaches the threshold value for opening the liquid phase valve 400, the valve cover 401 drives the support rod 403 to move obliquely upward to open the first channel 400, and the liquid in the first channel 400 flows into the third channel 404 and is discharged to the outside of the battery pack support structure 2. At this time, the spring 405 is compressed under the action of the liquid pressure. When the liquid in the first channel 400 is discharged, its pressure drops to the predetermined threshold value for opening the liquid phase valve 40, the valve cover 401 is reset, the spring 405 returns to its original shape, and the first channel 400 is closed. The predetermined threshold value for opening the liquid phase valve 40 is closely related to properties such as the elastic coefficient of the spring 405 provided in the second channel 402 .

[0052] Optionally, the length of the support rod 403 is greater than the length of the second channel 402, that is, the end of the support rod 403 away from the valve cover 401 is located outside the second channel 402. Optionally, a handle is provided at the end of the support rod 403 away from the valve cover 401, and the handle is perpendicular to the support rod 403. It can be understood that when the liquid pressure has not reached the threshold for opening the liquid phase valve 400, the valve cover 401 can be opened to discharge the liquid by pulling the handle or holding the end of the support rod 403 away from the valve cover 401.

[0053] In one embodiment, if Figure 6 As shown, in the battery pack structure with a module layered design, the battery pack support structure 2 is set to a multi-layer structure, the support portion 21 and the liquid guide structure 22 are located in the lower layer of the battery pack support structure 2, and the battery pack support structure 2 also includes a tray 50, which is located above the support portion 21 and is used to support the battery cell 10 in the upper layer. The structural schematic diagram of the tray is shown in Figure 7 As shown, the edge of the tray 50 is bent downward to form a guide surface, which is located above the groove 30 and is used to guide the liquid in the tray 50 to the groove 30. The bent end surface is located above the groove 30 in the vertical direction. When the upper tray 50 is immersed in water or the upper battery cell 10 sprays out electrolyte due to thermal runaway, the water or electrolyte can drip into the groove 30 through the guide surface at the edge of the tray 50, and then be guided by the guide plate 31, and the liquid is discharged to the battery pack support structure 2 through the liquid phase valve 40.

[0054] The embodiment of the utility model also provides a battery pack, which includes a battery pack support structure 2 and a plurality of battery cells 10 provided in any of the above embodiments, wherein a support portion 21 supports the plurality of battery cells 10, an explosion-proof valve 11 is provided on the pole end face of the battery cell 10, and a groove 30 is provided on one side of the explosion-proof valve 11, and the groove 30 is used to converge and guide the water in the battery pack support structure 2 or the electrolyte flowing out from the explosion-proof valve 11 during thermal runaway to the battery pack. The unnecessary water in the battery pack can be timely converged and guided out, and the water accumulation in the battery pack is reduced, which has an adverse effect on the electrical and mechanical properties of the battery pack. During thermal runaway, the electrolyte will spray and scatter from the explosion-proof valve 11, and at this time, the electrolyte will easily react with the metal to produce arcing in a high temperature state. Now, the groove 30 is provided on one side of the explosion-proof valve 11 to converge the electrolyte to the greatest extent, reduce the degree of its scattering in the battery pack, and reduce the probability of its arcing, thereby improving the safety performance of the battery pack.

[0055] The embodiment of the utility model further provides an electrical device, which includes the battery pack and the electrical device provided in the above embodiment, and the battery pack provides electrical energy for the electrical device.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0057] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A battery pack support structure, characterized in that: The battery pack support structure comprises: A supporting portion (21), wherein the supporting portion (21) is used to support the battery cell (10); A liquid conducting structure (22) is arranged at the edge of the support portion (21), and the liquid conducting structure (22) comprises a groove (30), and the groove (30) is used to conduct liquid in the battery pack support structure (2).

2. The battery pack support structure according to claim 1, characterized in that: The groove (30) comprises a bottom surface (303), and a first end surface (301) and a second end surface (302) arranged opposite to each other; the bottom surface (303) is arranged at a preset angle with the first end surface (301) and the second end surface (302); the first end surface (301) is close to the center of the battery pack support structure (2); a side of the first end surface (301) close to the battery cell (10) has a first contact line (3011); the first contact line (3011) is flush with the end surface of the pole of the battery cell (10).

3. The battery pack support structure according to claim 1, characterized in that: The groove (30) is arranged on one side of the explosion-proof valve (11) of the battery cell (10), the groove (30) is arranged along the direction in which the explosion-proof valve (11) is arranged, and the explosion-proof valve (11) is close to the groove (30).

4. The battery pack support structure according to claim 2, characterized in that: The first end surface (301) and / or the second end surface (302) are sloped surfaces or curved surfaces.

5. The battery pack support structure according to claim 1, characterized in that: The depth of the groove (30) is 10 mm to 15 mm.

6. The battery pack support structure according to claim 1 or 5, characterized in that: The groove comprises a bottom surface (303), and the width of the bottom surface (303) is 5 mm-15 mm.

7. The battery pack support structure according to claim 1, characterized in that: The liquid guide structure (22) comprises a guide plate (31), the groove comprises a bottom surface (303), the guide plate (31) is arranged on the bottom surface (303), and the guide plate (31) presents a shape with a high middle and low ends along the length direction of the groove (30).

8. The battery pack support structure according to claim 7, characterized in that: The height of the guide plate (31) is one third to two thirds of the depth of the groove (30), and the length of the guide plate (31) is equal to the length of the groove (30).

9. The battery pack support structure according to claim 7 or 8, characterized in that: The guide plate (31) and the groove (30) are integrally formed.

10. The battery pack support structure according to claim 1, characterized in that: The liquid guiding structure (22) comprises a liquid phase valve (40), wherein the liquid phase valve (40) is arranged at least at one end of the groove (30), and the liquid phase valve (40) is suitable for discharging liquid from the battery pack support structure (2) when the liquid pressure reaches a predetermined threshold.

11. The battery pack support structure according to claim 7, characterized in that: The liquid guiding structure (22) comprises a liquid phase valve (40), wherein the liquid phase valve (40) is arranged at both ends of the groove (30), and the liquid phase valve (40) is suitable for discharging liquid from the battery pack support structure (2) when the liquid pressure at both ends of the groove (30) reaches a predetermined threshold.

12. The battery pack support structure according to claim 1, characterized in that: The battery pack support structure is configured as a multi-layer structure, the support portion (21) and the liquid guide structure (22) are located in the lower layer of the battery pack support structure (2), the battery pack support structure (2) further comprises a tray (50), the tray (50) is located above the support portion (21) and is used to support the upper battery cell (10), the edge of the tray (50) is bent downward to form a guide surface, the guide surface is located above the groove (30) and is used to guide the liquid in the tray (50) to the groove (30).

13. A battery pack, comprising the battery pack support structure and the plurality of battery cells (10) according to any one of claims 1 to 12, an explosion-proof valve (11) being arranged on the pole end face of the battery cell (10), and the groove (30) being arranged on one side of the explosion-proof valve (11) for draining out moisture in the battery pack support structure (2) or electrolyte flowing out of the explosion-proof valve (11).

14. An electrical device, comprising the battery pack and the electrical device according to claim 13.

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