Battery pack and vehicle

Abstract

The utility model relates to a battery pack and a vehicle, the battery pack comprises a shell, a drain valve and a protective cover, the drain valve comprises a valve body and a plugging piece, the valve body is connected to the shell, the valve body is provided with a drain channel, and the drain channel is used for allowing liquid to flow through so as to drain the liquid from the interior of the shell; the blocking piece can move relative to the valve body so as to close or open the liquid discharging channel. The protective cover is located outside the shell, the orthographic projection of the protective cover on the shell covers at least part of the drain valve, and a drain outlet is formed in the protective cover and / or between the protective cover and the shell. According to the technical scheme, the protective cover is used for covering at least part of the drain valve so as to protect structures such as the valve body and the plugging piece of the drain valve, and therefore the normal drain function of the drain valve is guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular, to a battery pack and a vehicle. Background Art

[0002] During vehicle use, the battery pack needs to be cooled so that it is at a suitable operating temperature to ensure working efficiency. Liquid cooling is currently used as the main means of cooling the battery pack. A small amount of condensed water or internal seepage water will be generated inside the battery pack during the cooling process. In addition, coolant leakage may occur due to damage to the liquid cooling pipe and other reasons. The liquid in the battery pack will cause a short circuit in the battery module, thereby causing the risk of thermal runaway inside the battery pack.

[0003] In the related art, the liquid in the battery pack can be discharged through a drain valve. However, in actual application, the drain valve may have problems such as abnormal opening or failure to open. Utility Model Content

[0004] The purpose of the present disclosure is to provide a battery pack and a vehicle, wherein the drain function of the drain valve of the battery pack can be guaranteed, so as to improve the safety of the battery pack and at least partially solve the above-mentioned technical problems.

[0005] In order to achieve the above object, according to a first aspect of the present disclosure, a battery pack is provided, comprising:

[0006] case;

[0007] A liquid discharge valve, comprising a valve body and a blocking member, wherein the valve body is connected to the housing, the valve body has a liquid discharge channel, the liquid discharge channel is used for liquid to flow through so as to discharge the liquid from the interior of the housing, and the blocking member can move relative to the valve body to close or open the liquid discharge channel; and

[0008] A protective cover is located outside the shell, the orthographic projection of the protective cover on the shell covers at least a portion of the drain valve, and a drain port is provided between the protective cover and / or the protective cover and the shell.

[0009] Optionally, the position of at least one of the drain ports relative to the protective cover is configured to be able to be used to observe the position of the blocking member.

[0010] Optionally, the protective cover includes a connecting portion and a protective portion, the connecting portion is connected to the valve body and / or the shell, the protective portion is connected to the connecting portion, an avoidance gap is provided between the protective portion and the shell, the avoidance gap is used to avoid movement of the blocking member, the drain port is provided on the protective portion, and / or a drain gap is provided between the protective portion and the shell to form the drain port.

[0011] Optionally, the protection part includes a first protection part and a second protection part connected to each other. A liquid discharge gap is formed between the first protection part and the housing, and an avoidance gap is formed between the second protection part and the housing.

[0012] Optionally, the liquid discharge port includes a liquid discharge hole, and at least one of the liquid discharge holes is provided on the first protection part; and / or

[0013] at least one of the liquid discharge holes is provided on the second protection part; and / or

[0014] at least one of the liquid discharge holes is a strip-shaped hole extending from the first protection part to the second protection part.

[0015] Optionally, the housing includes a bottom plate, the bottom plate has a front end and a rear end corresponding to the front-rear direction of the vehicle and a left end and a right end corresponding to the left-right direction of the vehicle. At least one of the liquid discharge valves and the protective cover are respectively provided at the front end and the rear end. The strip-shaped hole of the protective cover located at the front end is on one side of the protective cover facing the rear end or the left end or the right end; the strip-shaped hole of the protective cover located at the rear end is on one side of the protective cover facing the front end or the left end or the right end.

[0016] Optionally, the housing includes a bottom plate, the bottom plate includes a body and a flange connected to the body. The body has a mounting groove recessed towards the flange, the liquid discharge valve passes through the mounting groove, and the protective cover is connected to the flange and at least partially covers the mounting groove in the projection on the bottom plate.

[0017] Optionally, at least part of the surface of the protective cover is provided with a protective layer for protecting the surface of the protective cover covered by the protective layer.

[0018] Optionally, the housing includes a bottom plate, and the number of the liquid discharge valves is set to be multiple and are respectively arranged at the corner ends of the bottom plate.

[0019] According to a second aspect of the present disclosure, a vehicle is provided, including the battery pack as described above.

[0020] Through the above technical solutions, the protective cover is used to cover at least part of the liquid discharge valve, so as to be able to block the impact of foreign objects such as stones on the liquid discharge valve, protect the structures such as the valve body and the plugging member of the liquid discharge valve, ensure the normal liquid discharge function of the liquid discharge valve. At the same time, a liquid discharge port can be provided on the protective cover, and a liquid discharge port can also be formed between the protective cover and the housing, for discharging the liquid discharged from the inside of the battery pack by the liquid discharge valve. While protecting the liquid discharge valve, the liquid discharge function of the liquid discharge valve is realized, reducing the possibility that the liquid stays between the liquid discharge valve and the protective cover and then backflows into the battery pack, so as to reduce the risk of thermal runaway of the battery pack and improve the use safety of the battery pack.

[0021] Other features and advantages of the present disclosure will be described in detail in the following detailed description section. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0023] Figure 1 is a schematic diagram of the overall structure of the battery pack provided in the exemplary embodiment of the present disclosure;

[0024] Figure 2 is a schematic diagram of the overall structure of the battery pack provided in the exemplary embodiment of the present disclosure, where the protective cover is not shown;

[0025] Figure 3 is Figure 1 an enlarged schematic view of part A in;

[0026] Figure 4 is Figure 2 an enlarged schematic view of part B in;

[0027] Figure 5 is a schematic diagram of the structure in which the protective cover is connected to the bottom plate provided in the exemplary embodiment of the present disclosure;

[0028] Figure 6 is an exploded schematic view of the overall structure of the drain valve provided in the exemplary embodiment of the present disclosure.

[0029] DESCRIPTION OF REFERENCE NUMERALS

[0030] 1. Housing; 11. Bottom plate; 111. Body; 112. Flange; 113. Installation groove; 2. Drain valve; 21. Valve body; 211. First valve body; 2111. Limiting portion; 212. Second valve body; 22. Plugging member; 23. Expansion member; 24. Elastic member; 3. Protective cover; 31. Connecting portion; 32. Protective portion; 321. First protective portion; 322. Second protective portion; 4. Drain port; 41. Drain hole; 5. Avoidance gap; 6. Drain gap; 7. Battery pack. DETAILED DESCRIPTION

[0031] The following will describe in detail the specific embodiments of the present disclosure with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present disclosure, and are not used to limit the present disclosure.

[0032] In the present disclosure, unless otherwise stated, "inner" and "outer" refer to the inside and outside of the contour of the corresponding component; "far" and "near" refer to the far and near in the spatial position of the corresponding component relative to another component. In addition, the terms "first", "second", etc. used in the present disclosure are used to distinguish one element from another, and do not have sequentiality and importance. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0033] In the related art, there are problems such as abnormal valve opening or inability to open the drain valve during actual application.

[0034] During the research process, the inventor found that this problem still existed after replacing different types of drain valves. Further research found that since the drain valve is installed on the housing, part of the structure of the drain valve is exposed outside and is easily damaged by external impacts. For example, in the case of vehicle bottoming or stone splashing impact, the drain valve may be damaged, resulting in abnormal valve opening or inability to open the valve, and then problems such as drain function failure or battery pack seal failure may occur.

[0035] To solve the above problems, according to the first aspect of the present disclosure, referring to Figures 1 to 5 , the present disclosure provides a battery pack, including a housing 1, a drain valve 2, and a protective cover 3.

[0036] The drain valve 2 may include a valve body 21 and a plugging member 22. The valve body 21 is connected to the housing 1. The valve body 21 has a drain channel for allowing a liquid to flow through to discharge the liquid from the inside of the housing 1. The plugging member 22 can move relative to the valve body 21 to close or open the drain channel. Among them, the liquid may be coolant or condensed water that accidentally leaks inside the battery pack 7.

[0037] The protective cover 3 is located outside the housing 1. The orthographic projection of the protective cover 3 on the housing 1 can cover at least part of the drain valve 2. There is a drain port 4 between the protective cover 3 and / or the protective cover 3 and the housing 1. Among them, the drain valve 2 is installed at the bottom of the battery pack 7. Therefore, the orthographic projection of the protective cover 3 on the housing 1 is the projection of the protective cover 3 along the direction from the bottom to the top of the battery pack 7. In this way, the drain valve 2 can be covered by the protective cover 3 to reduce the possibility of structural damage to the drain valve 2 caused by external objects outside the battery pack 7 hitting the drain valve 2, ensure the integrity of the structure of the drain valve 2, and ensure the normal drain function of the drain valve 2.

[0038] Through the above technical solution, the protective cover 3 is used to cover at least a part of the drain valve 2 to prevent the impact of foreign objects such as stones on the drain valve 2, so as to protect the structures such as the valve body 21 and the plugging member 22 of the drain valve 2, ensure the normal liquid drainage function of the drain valve 2. At the same time, a drain port 4 can be provided on the protective cover 3, and a drain port 4 can also be formed between the protective cover 3 and the housing 1 to discharge the liquid discharged from the drain valve 2 from inside the battery pack 7. While protecting the drain valve 2, it cooperates to realize the liquid drainage function of the drain valve 2, reduce the possibility that the liquid stays between the drain valve 2 and the protective cover 3 and then backflows into the battery pack 7, so as to reduce the risk of thermal runaway of the battery pack 7 and improve the use safety of the battery pack 7.

[0039] In some embodiments, referring to Figure 1 、 Figure 3 and Figure 5 , the position of at least one drain port 4 relative to the protective cover 3 is configured to be able to observe the position of the plugging member 22. In this way, the opening and closing state of the drain valve 2 can be judged by observing the position of the plugging member 22, and it can be observed without disassembling the protective cover 3. Thus, the opening and closing state of the drain valve 2 can be simply and preliminarily judged.

[0040] For example, when it is observed that the position of the plugging member 22 makes the drain passage open, but no liquid is discharged through the drain passage and the drain port 4, at this time, the drain valve 2 needs to be detected and repaired to reduce the possibility that the external liquid of the battery pack 7 backflows into the battery pack 7 due to the mis-opening of the drain valve 2, and ensure the use safety of the battery pack 7.

[0041] For the convenience of understanding, the present disclosure first describes the structure and application process of the drain valve 2 exemplarily. The drain valve 2 can be applied to the battery pack 7, as shown in Figure 2 and Figure 4 , referring to Figure 6 , the valve body 21 includes a first valve body 211 and a second valve body 212. The first valve body 211 has a limiting portion 2111. The second valve body 212 is sleeved on the first valve body 211. The second valve body 212 and the limiting portion 2111 are used to clamp the bottom wall of the housing 1 so as to install the drain valve 2 on the housing 1 of the battery pack 7. In addition, the drain valve 2 further includes an expansion member 23 and an elastic member 24 connected between the first valve body 211 and the plugging member 22.

[0042] The second valve body 212 is located inside the battery pack 7, and a part of the limiting portion 2111 is located outside the battery pack 7. The first valve body 211 penetrates through the bottom wall of the housing 1 of the battery pack 7 so that the liquid inlet of the liquid discharge channel is located inside the battery pack 7. In this way, after the liquid inside the battery pack 7 leaks, it flows through the bottom wall of the housing 1 of the battery pack 7, and then flows into the liquid discharge channel through the liquid inlet. The expansion member 23 absorbs liquid and expands to drive the blocking member 22 to move away from the first valve body 211 to open the liquid discharge channel. Therefore, the liquid can be discharged from inside the battery pack 7 to the outside of the battery pack 7 through the liquid discharge channel. After the liquid discharge is completed, the elastic member 24 drives the blocking member 22 to move towards the first valve body 211 to close the liquid discharge channel.

[0043] In some embodiments, referring to Figure 1 , Figure 3 and Figure 5 , the protective cover 3 includes a connecting portion 31 and a protective portion 32. The connecting portion 31 is connected to the valve body 21 and / or the housing 1, and the protective portion 32 is connected to the connecting portion 31. There is a clearance 5 between the protective portion 32 and the housing 1. In this way, when there is an accidental leakage of the coolant or a large amount of condensed water generated inside the battery pack 7, etc., the expansion member 23 absorbs liquid and expands to drive the blocking member 22 to move relative to the valve body 21 to open the liquid discharge channel. At this time, the clearance 5 is used to avoid the movement of the blocking member 22, so as to be able to protect the liquid discharge valve 2 through the protective portion 32 without affecting the normal liquid discharge function of the liquid discharge valve 2. Then, the liquid inside the battery pack 7 is discharged to the outside of the battery pack 7 through the liquid discharge channel and the liquid discharge port 4. Among them, the protective cover 3 can be connected to the housing 1 or the valve body 21, so as to cover the liquid discharge valve 2 to play a protective role and not affect the movement of the blocking member 22 relative to the valve body 21, that is, it does not affect the normal liquid discharge function of the liquid discharge valve 2. In the exemplary embodiment of the present disclosure, the protective cover 3 is connected to the housing 1. In some other possible embodiments not shown in the drawings, the protective cover 3 can be connected to the valve body 21 through the connecting portion 31, or the protective cover 3 can also be connected to both the housing 1 and the valve body 21 through the connecting portion 31. The present disclosure does not make specific limitations on this.

[0044] In addition, when the protective portion 32 is deformed, such as by impact, etc., the clearance 5 can serve as a buffer space for the deformation of the protective portion 32, so that the deformed part of the protective portion 32 does not directly act on the structures of the liquid discharge valve 2, such as the valve body 21 and the blocking member 22 of the liquid discharge valve 2, and reduces the damage to the structures of the liquid discharge valve 2.

[0045] It can be understood that, in combination with the above related descriptions, the position of the liquid discharge port 4 can be set according to actual needs. In one embodiment, the liquid discharge port 4 can be provided on the protection part 32. The liquid discharge port 4 can be configured as a plurality of through holes formed in the protection part 32 for discharging liquid from the buffer space to the outside of the battery pack 7. Among them, the number and size of the through holes can be selected according to actual needs, and the present disclosure does not make specific limitations thereon. In another embodiment, there can be a liquid discharge gap 6 for forming the liquid discharge port 4 between the protection part 32 and the housing 1. In this way, the liquid in the buffer space can flow out of the battery pack 7 through the liquid discharge gap 6. In addition, the liquid discharge gap 6 can also reduce the assembly difficulty when the protective cover 3 is installed on the housing 1, that is, the tolerance gap existing between the protective cover 3 and the housing 1 during installation can be configured as the above-mentioned liquid discharge gap 6.

[0046] It should be noted that the above embodiments of providing the liquid discharge port 4 on the protection part 32 and forming the liquid discharge gap 6 between the protection part 32 and the housing 1 can be adopted simultaneously, and the present disclosure is not limited thereto.

[0047] In some embodiments, referring to Figure 1 、 Figure 3 and Figure 5 ,the protection part 32 can include a connected first protection part 321 and a second protection part 322. A liquid discharge gap 6 is formed between the first protection part 321 and the housing 1. In this way, the protective cover 3 is connected to the housing 1 through the connection part 31. The housing 1 can include a bottom plate 11. Exemplarily, the connection part 31 can be configured as a connecting plate body. Therefore, for example, fastening bolts during the self-assembly process of the battery pack 7 can be passed through the connecting plate body together to install the protective cover 3 on the bottom plate 11.

[0048] Among them, the first protection part 321 is connected to the connecting plate body and protrudes away from the bottom plate 11 to form a liquid discharge gap 6 with the bottom plate 11. It can be understood that, according to actual use requirements, both the distance between the first protection part 321 and the bottom plate 11 and the size of the first protection part 321 can be adjusted adaptively to be able to adjust the size of the liquid discharge gap 6 adaptively. In addition, the second protection part 322 is connected to the first protection part 321 and protrudes outward away from the bottom plate 11 to be able to form an avoidance gap 5 between the second protection part 322 and the bottom plate 11. The avoidance gap 5 can avoid the movement of the plugging member 22 to ensure the normal liquid discharge function of the liquid discharge valve 2.

[0049] In some other possible alternative embodiments not shown in the drawings, the protection part 32 may also include a third protrusion. The third protrusion is connected to the connection part 31 and forms a drainage gap 6 between the third protrusion and the housing 1. At the same time, an avoidance gap 5 is also formed between the third protrusion and the housing 1. Similarly, by providing the third protrusion, the drainage valve 2 can be protected without affecting the normal drainage function of the drainage valve 2. It can be understood that in a further alternative embodiment, if it is considered that external impurities are likely to penetrate through the drainage gap 6 and enter the avoidance gap 5. For example, solid impurities may impact and damage the drainage valve 2 or block the drainage channel, affecting the normal function of the drainage valve 2, and liquid impurities are likely to backflow into the battery pack 7, affecting the use safety of the battery pack 7. Therefore, at this time, the drainage gap 6 can be sealed by a seal and a drainage port 4 can be provided on the third protrusion to reduce the possibility of external impurities entering the avoidance gap 5 and affecting the normal use of the drainage valve 2. The present disclosure is not limited to this.

[0050] In some embodiments, referring to Figure 1 , Figure 3 and Figure 5 , the drainage port 4 may include a drainage hole 41. The drainage hole 41 can be constructed in any suitable manner. In one embodiment, the number of drainage holes 41 can be set to one or more, and at least one drainage hole 41 is provided on the first protection part 321. In this way, the liquid is discharged from the inside of the battery pack 7 through the drainage valve 2, then flows through the avoidance gap 5 and flows to between the first protection part 321 and the housing 1, and finally is discharged from the drainage hole 41. In another embodiment, similarly, the number of drainage holes 41 can be set to one or more, and at least one drainage hole 41 is provided on the second protection part 322. In this way, the liquid is discharged from the inside of the battery pack 7 through the drainage valve 2, then flows through the avoidance gap 5 and is discharged through the drainage hole 41. Of course, the drainage holes 41 can also be provided on both the first protection part 321 and the second protection part 322 at the same time. Among them, the drainage holes 41 can be through holes such as square or circular, and the present disclosure does not make specific limitations on this.

[0051] In some other embodiments, the number of drainage holes 41 can be set to one or more, and at least one drainage hole 41 can be a strip-shaped hole extending from the first protection part 321 to the second protection part 322. The size of the strip-shaped hole is relatively large. In this way, the drainage efficiency of discharging the liquid from the avoidance gap 5 to the outside of the battery pack 7 can be improved through the strip-shaped hole, and at the same time, the position of the plugging member 22 can be observed more clearly through the strip-shaped hole to judge the opening and closing condition of the drainage valve 2. It can be understood that the strip-shaped hole can be provided alone or can be provided at the same time as the drainage holes 41 provided on the first protection part 321 and the second protection part 322, and the present disclosure is not limited to this. In addition, for observing the plugging member 22 through the drainage port 4 mentioned above, the drainage port 4 can be at least one of the strip-shaped hole, the drainage hole 41 and the drainage gap 6.

[0052] In some embodiments, referring to Figure 1 , Figure 3 and Figure 5 , the housing 1 may include a bottom plate 11, and the bottom plate 11 has a front end and a rear end corresponding to the front-rear direction of the vehicle and a left end and a right end corresponding to the left-right direction of the vehicle. Herein, the front-rear direction of the vehicle and the left-right direction of the vehicle are regarded as the front-rear direction and the left-right direction when the driver drives the vehicle forward normally. In addition, at least one drain valve 2 and a protective cover 3 are respectively arranged at the front end and the rear end. The strip-shaped holes of the protective cover 3 located at the front end are on one side of the protective cover 3 facing the rear end, the left end or the right end, and the strip-shaped holes of the protective cover 3 located at the rear end are on one side of the protective cover 3 facing the front end, the left end or the right end. In this way, by arranging the drain valve 2, when there is accidental leakage of the coolant or a large amount of condensed water generated inside the battery pack 7, etc., the liquid inside the battery pack 7 can be discharged to the outside of the battery pack 7, reducing the risk of thermal runaway of the battery pack 7 and improving the use safety of the battery pack 7. At the same time, the protective cover 3 is arranged to protect the drain valve 2 and ensure the normal liquid discharge function of the drain valve 2.

[0053] In addition, it can be understood that during the normal driving process of the vehicle, the side of the vehicle directly facing the airflow relative to the driving direction is the windward side, and the windward side will directly contact the air and bear the wind resistance. During the normal driving process of the vehicle, the side of the vehicle not directly facing the airflow relative to the driving direction is the leeward side. When the vehicle is driving, the leeward side is in the "wind shadow area" of the vehicle itself and is less affected by the direct airflow. Therefore, arranging the strip-shaped holes on the leeward side of the vehicle can reduce the possibility that external impurities enter the avoidance gap 5 through the strip-shaped holes and damage the structure of the drain valve 2, affecting the normal liquid discharge of the drain valve 2. Exemplarily, when the vehicle is driving forward normally, the front end of the vehicle, that is, the front end of the bottom plate 11, is the windward side. Therefore, at this time, the strip-shaped holes of the protective cover 3 located at the front end are on one side of the protective cover 3 facing the rear end, the left end or the right end; when the vehicle is driving backward, the rear end of the vehicle, that is, the rear end of the bottom plate 11, is the windward side. Therefore, at this time, the strip-shaped holes of the protective cover 3 located at the rear end are on one side of the protective cover 3 facing the front end, the left end or the right end. Of course, the number of the above strip-shaped holes can also be set to be multiple and can be arranged at any position on the leeward side, and the present disclosure does not make specific limitations thereon.

[0054] It should be noted that during the normal driving process of the vehicle, the airflow mainly flows from both sides of the vehicle. Therefore, when the vehicle is driving forward normally, the strip-shaped holes on the side of the protective cover 3 located at the rear end facing the front end are also in the "wind shadow area", that is, on the leeward side of the vehicle. Similarly, when the vehicle is driving backward normally, the strip-shaped holes on the side of the protective cover 3 located at the front end facing the rear end are also in the "wind shadow area", that is, on the leeward side of the vehicle.

[0055] In some embodiments, referring toFigure 1 , Figure 3 and Figure 5 , the housing 1 may include a bottom plate 11. The bottom plate 11 may include a main body 111 and a flange 112 connected to the main body 111. The flange 112 is used to connect with the rest of the housing 1 so as to cooperate with the rest of the housing 1 through the main body 111 to form an installation space for the internal structure for accommodating the battery pack 7. Wherein, the main body 111 has an installation groove 113 concave towards the flange 112, and the drain valve 2 passes through the installation groove 113. In this way, at least a part of the drain valve 2 located outside the battery pack 7 is located in the installation groove 113, so as to be able to protect at least a part of the drain valve 2 through the groove wall of the installation groove 113.

[0056] In addition, the protective cover 3 may be connected to the flange 112 and the projection of the protective cover 3 on the housing 1 covers at least a part of the installation groove 113. Wherein, the flange 112 may be connected to the rest of the housing 1 through fastening bolts. In this way, the fastening bolts can pass through the connecting portion 31 of the protective cover 3 to be able to connect the protective cover 3 to the flange 112. At this time, the projection of the protective cover 3 on the housing 1 covers at least a part of the installation groove 113, that is, the first protective portion 321 and the second protective portion 322 of the protective cover 3 cover at least a part of the installation groove 113 and at least a part of the drain valve 2, so as to protect the drain valve 2 and ensure the normal drainage function of the drain valve 2. In some other possible implementation manners not shown in the drawings, the protective cover 3 may also be connected to the main body 111 or the flange 112 of the bottom plate 11 by other means such as welding or clamping, as long as it can cover the drain valve 2. The present disclosure does not make specific limitations on this.

[0057] In some embodiments, at least a part of the surface of the protective cover 3 may be provided with a protective layer. Exemplarily, the protective layer may be, for example, a PVC (polyvinyl chloride) coating. The PVC coating has good corrosion resistance and wear resistance. Spraying on the surface of the protective cover 3 can form the above-mentioned protective layer to prevent the protective cover 3 from being eroded by environmental factors such as moisture, chemicals, ultraviolet rays, etc., and the impact of solid impurities such as stones, so as to be able to extend the service life of the protective cover 3. In addition, PVC coatings are usually easy to spray, have a fast drying speed, can form a continuous and uniform coating, and have high spraying efficiency on the protective cover 3. It can be understood that the protective layer may also be, for example, an epoxy resin coating or a polyurethane coating, etc. The present disclosure is not limited thereto.

[0058] In some embodiments, referring to Figure 1 , Figure 3 and Figure 5, the housing 1 may include a bottom plate 11. The number of the liquid discharge valves 2 may be set to be multiple and are respectively arranged at the corner ends of the bottom plate 11. In this way, when the vehicle is in different postures, such as driving, parking, going uphill, going downhill or rolling, if the coolant inside the battery pack 7 leaks accidentally, the coolant can be discharged in time through at least one liquid discharge valve 2, so as to meet the timely discharge of the coolant in different postures of the vehicle, reduce the possibility of short-circuit thermal runaway inside the battery pack 7 affected by the coolant, and improve the use safety of the battery pack 7. Exemplarily, the number of the liquid discharge valves 2 is set to be four, and the four liquid discharge valves 2 are respectively arranged at the four corner ends of the bottom plate 11. In addition, the number of the liquid discharge valves 2 may also be set to be five or six, etc. Among them, the four liquid discharge valves 2 are respectively arranged at the four corner ends of the bottom plate 11, and the other liquid discharge valves 2 may be arranged at the center of the bottom plate 11 or the installation positions of the liquid discharge valves 2 may be set according to actual requirements. The present disclosure is not limited thereto.

[0059] According to a second aspect of the present disclosure, a vehicle is provided, including the battery pack 7 as above. The vehicle has all the beneficial effects of the above battery pack 7. Among them, the vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. The embodiments of the present application do not make special restrictions on the above vehicles.

[0060] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0061] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure does not explain various possible combination manners separately.

[0062] In addition, any combination can be made between various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A battery pack, characterized in that: include: case; A liquid discharge valve, comprising a valve body and a blocking member, wherein the valve body is connected to the housing, the valve body has a liquid discharge channel, the liquid discharge channel is used for liquid to flow through so as to discharge the liquid from the interior of the housing, and the blocking member can move relative to the valve body to close or open the liquid discharge channel; as well as A protective cover is located outside the shell, the orthographic projection of the protective cover on the shell covers at least a portion of the drain valve, and a drain port is provided between the protective cover and / or the protective cover and the shell.

2. The battery pack according to claim 1, characterized in that: The position of at least one of the drain ports relative to the protective cover is configured to be used to observe the position of the blocking member.

3. The battery pack according to claim 1 or 2, characterized in that: The protective cover includes a connecting portion and a protective portion, the connecting portion is connected to the valve body and / or the shell, the protective portion is connected to the connecting portion, an avoidance gap is provided between the protective portion and the shell, the avoidance gap is used to avoid the movement of the blocking member, the protective portion is provided with the drain port, and / or a drain gap is provided between the protective portion and the shell to form the drain port.

4. The battery pack according to claim 3, characterized in that: The protection part comprises a first protection part and a second protection part which are connected to each other. The liquid discharge gap is formed between the first protection part and the shell, and the avoidance gap is formed between the second protection part and the shell.

5. The battery pack according to claim 4, characterized in that: The drain port comprises a drain hole, at least one of the drain holes being arranged on the first protective portion; and / or At least one of the drainage holes is arranged on the second protective part; and / or At least one of the drainage holes is a strip-shaped hole extending from the first protection portion to the second protection portion.

6. The battery pack according to claim 5, characterized in that: The shell includes a bottom plate, which has a front end and a rear end corresponding to the front-to-rear direction of the vehicle and a left end and a right end corresponding to the left-to-right direction of the vehicle, and the front end and the rear end are each provided with at least one drain valve and the protective cover, and the strip hole of the protective cover located at the front end is located on the side of the protective cover facing the rear end or the left end or the right end; the strip hole of the protective cover located at the rear end is located on the side of the protective cover facing the front end or the left end or the right end.

7. The battery pack according to claim 1, characterized in that: The shell includes a bottom plate, the bottom plate includes a main body and a flange connected to the main body, the main body has a mounting groove concave toward the flange, the drain valve is inserted into the mounting groove, and the protective cover is connected to the flange and its projection on the bottom plate covers at least a portion of the mounting groove.

8. The battery pack according to claim 1, characterized in that: At least a portion of the surface of the protective cover is provided with a protective layer for protecting the surface of the protective cover covered by the protective layer.

9. The battery pack according to claim 1, characterized in that: The housing comprises a bottom plate, and the number of the liquid discharge valves is multiple and respectively arranged at the corner ends of the bottom plate.

10. A vehicle, characterized in that: A battery pack comprising any one of claims 1 to 9.

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