Battery pack box body and battery pack

Abstract

The utility model provides a battery pack box body and a battery pack. The battery pack box body comprises a box body and a drainage structure, a containing cavity is formed in the box body and used for containing a battery module, a pole is arranged on the outer wall of the box body, and one end of the pole penetrates through the box body and is used for being electrically connected with the battery module; the liquid discharging structure is arranged on the outer wall of the box body, the liquid discharging structure and the pole are located on the same side of the box body, the liquid discharging structure comprises a liquid discharging flow channel formed in the outer wall of the box body, and the liquid discharging flow channel extends in the direction away from the pole and discharges accumulated water on the outer wall of the box body; therefore, accumulated water on the battery pack box body can be discharged, the stable work of the battery pack can be ensured, and poor contact of the battery pack can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, specifically to a battery pack housing and a battery pack. Background Technology

[0002] Most new energy vehicles on the market currently use 12V batteries. 12V battery packs lack drainage structures and rely on their own sealing properties and placement to achieve waterproofing. Typically, battery packs are avoided in locations with a high risk of water ingress, such as areas prone to condensation from the air conditioning system. However, as battery packs are used over time, the likelihood of water exposure increases due to condensation from the air conditioning system, rain, snow, or wading. When the battery pack comes into contact with water and there is water accumulation on top, there is a risk of water corroding the terminal metal and flowing into the battery pack. Utility Model Content

[0003] The present invention provides a battery pack housing and a battery pack that can drain water from the battery pack housing, which not only ensures the stable operation of the battery pack, but also prevents poor contact of the battery pack.

[0004] In a first aspect, embodiments of the present invention provide a battery pack housing, comprising:

[0005] A housing with an internal cavity for housing a battery module; an electrode post is provided on the outer wall of the housing, one end of which passes through the housing and is used for electrical connection with the battery module; and...

[0006] A drainage structure is provided on the outer wall of the housing and is located on the same side of the housing as the electrode post. The drainage structure includes a drainage channel formed on the outer wall of the housing. The drainage channel extends in a direction away from the electrode post and drains the water accumulated on the outer wall of the housing in a direction away from the electrode post.

[0007] In one embodiment, the drainage structure includes a guide plate disposed on the outer wall of the housing and on the same side of the housing as the electrode post. The guide plate has a guide surface facing away from the housing, and the guide surface is inclined toward one side of the housing in the direction facing away from the electrode post.

[0008] The drainage channel is located on the guide surface.

[0009] In one embodiment, the angle between the guide surface and the outer wall of the box is set to 2° to 5°.

[0010] In one embodiment, the drainage structure includes a plurality of protruding ribs on the outer wall of the box, the plurality of ribs being arranged side by side, each rib extending in a direction away from the pole post, and a drainage channel being formed between two adjacent ribs.

[0011] In one embodiment, the electrode post includes a positive electrode post and a negative electrode post arranged side by side in a first direction;

[0012] The plurality of ribs are located on one side of the pole in the second direction, the plurality of ribs are arranged side by side in the first direction, and each rib extends along the second direction.

[0013] In one embodiment, the cross-sectional profile of the rib is arc-shaped, and on the side near the outer wall of the box, the sidewall of the rib and the adjacent sidewall of the rib are smoothly connected, so that the cross-sectional profile of the drainage channel is arc-shaped.

[0014] In one embodiment, the drain channel has a drain end that is away from the electrode post;

[0015] Near the drain end, the height of the rib gradually decreases in the direction away from the pole post.

[0016] In one embodiment, the width of the drainage channel is set to 3mm to 6mm in the arrangement direction of the plurality of ribs.

[0017] In one embodiment, the battery pack housing further includes a liquid collection structure, which is disposed on the outer wall of the housing and located around the electrode post. The liquid collection structure forms a liquid collection tank, which is used to collect water accumulated on the battery pack when the battery pack is exposed to water. The liquid collection structure is provided with a drain port communicating with the liquid collection tank.

[0018] The drainage structure is located inside the collection tank, and the drainage channel is connected to the drainage port to drain the accumulated water in the collection tank from the drainage port.

[0019] In one embodiment, the liquid collection structure includes a plurality of liquid collection plates, which protrude from the outer wall of the housing and enclose the liquid collection trough. The plurality of liquid collection plates include a first plate closest to the pole post.

[0020] The drain outlet is located on any of the liquid collection plates other than the first plate.

[0021] In one embodiment, the plurality of liquid collection plates further includes a second plate disposed opposite to the first plate, wherein the direction from the first plate to the second plate is defined as a first direction, and the extending direction of the second plate is defined as a second direction;

[0022] The drain outlet is located on the second plate.

[0023] The plurality of drainage channels are arranged along the second direction, and each of the drainage channels extends along the first direction.

[0024] In one embodiment, the drainage channel has a drainage end near the drainage port, and the total width of the plurality of drainage ends is less than or equal to the width of the drainage port.

[0025] In one embodiment, the height of the liquid collection plate is set to 3mm to 6mm.

[0026] In one embodiment, the housing includes:

[0027] A base having a receiving groove with an opening on one side for placing a battery module; and,

[0028] A cover body, which is disposed on the base body and covers the opening of the receiving groove to form a sealed receiving cavity;

[0029] The pole post is located on the side of the cover that is away from the base.

[0030] The drainage structure is located on the side of the cover opposite to the seat.

[0031] Secondly, embodiments of the present invention provide a battery pack, comprising:

[0032] The aforementioned battery pack housing; and,

[0033] A battery module is disposed within the receiving cavity of the battery pack housing and is electrically connected to the terminals on the battery pack housing.

[0034] The beneficial effects of the embodiments of this utility model are as follows:

[0035] In an embodiment of this utility model, the battery pack housing includes a housing and a drainage structure. The housing contains a cavity for housing the battery modules. The outer wall of the housing is provided with terminals electrically connected to the battery modules. The drainage structure on the outer wall of the housing forms drainage channels. When the battery pack encounters water or drips water, there is a risk of water accumulation on the outer wall of the battery pack housing. By providing the drainage structure, the accumulated water can be discharged from the drainage channels, thus preventing water accumulation on the outer wall of the battery pack housing and preventing water from flowing into the battery pack housing. Simultaneously, the drainage channels extend away from the terminals, discharging the accumulated water away from the terminals, thereby preventing water from flowing to the terminals and causing metal corrosion. This ensures stable operation of the battery pack and prevents poor contact. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a first axial side view of the battery pack housing provided in an embodiment of the present invention;

[0038] Figure 2 This is a second axial side view of the battery pack housing provided in an embodiment of the present invention;

[0039] Figure 3 This is a top view of the battery pack housing provided in an embodiment of this utility model;

[0040] Figure 4 yes Figure 1 Sectional view along the middle AA;

[0041] Figure 5 yes Figure 1 A sectional view along the middle edge BB;

[0042] Figure 6 yes Figure 5 A magnified schematic diagram of part C in the image;

[0043] Figure 7 This is an axial view of the drainage structure provided in an embodiment of this utility model;

[0044] Figure 8 for Figure 7 A front view of the drainage structure in the middle;

[0045] Figure 9 for Figure 7 A sectional view along the middle DD;

[0046] Figure 10 This is a schematic diagram of the battery pack provided in an embodiment of the present invention.

[0047] The names of the components corresponding to the corresponding reference numerals in the figure are:

[0048] 1000 battery pack;

[0049] 100 Battery pack housing; 1 Housing; 11 Receiving cavity; 12 Outer wall; 13 Base; 131 Receiving groove; 14 Cover; 2 Terminal post; 21 Positive terminal post; 22 Negative terminal post; 3 Drainage structure; 31 Drainage channel; 311 Drainage end; 32 Guide plate; 321 Guide surface; 33 Rib; 331 Side wall; 4 Liquid collection structure; 41 Liquid collection trough; 42 Drainage port; 43 Liquid collection plate; 431 First plate; 432 Second plate;

[0050] 200 battery module;

[0051] F1 is the first direction; F2 is the second direction; Detailed Implementation

[0052] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0053] Firstly, this utility model provides a battery pack housing 100. (See also...) Figure 1 , Figure 2 and Figure 9 The battery pack housing 100 is used for the battery pack 1000. The battery pack housing 100 includes a housing 1 and a drainage structure 3. The housing 1 has a receiving cavity 11 for placing the battery module 200. The outer wall 12 of the housing 1 is provided with a terminal post 2. One end of the terminal post 2 passes through the housing 1 and is used for electrical connection with the battery module 200. The drainage structure 3 is provided on the outer wall 12 of the housing 1 and is located on the same side of the housing 1 as the terminal post 2. The drainage structure 3 includes a drainage channel 31 formed on the outer wall 12 of the housing 1. The drainage channel 31 extends in a direction away from the terminal post 2 and drains the water accumulated on the outer wall 12 of the housing 1 in a direction away from the terminal post 2.

[0054] In an embodiment of this utility model, the battery pack housing 100 includes a housing 1 and a drainage structure 3. The housing 1 has a cavity 11 for housing the battery module 200. An electrode post 2 electrically connected to the battery module 200 is provided on the outer wall 12 of the housing 1. The drainage structure 3 has a drainage channel 31 formed on the outer wall 12 of the housing 1. When the battery pack 1000 comes into contact with water or drips water, there is a risk of water accumulation on the outer wall 12 of the battery pack housing 100. This risk is mitigated by the design of the drainage structure 3. The drainage structure 3 allows accumulated water to be discharged from the drainage channel 31, thereby preventing water accumulation on the outer wall 12 of the battery pack housing 100 and preventing water from flowing into the interior of the battery pack housing 100. At the same time, the drainage channel 31 extends away from the terminal post 2, allowing accumulated water to be discharged away from the terminal post 2, thereby preventing water from flowing to the terminal post 2 and causing metal corrosion. In this way, the stable operation of the battery pack 1000 can be ensured, and poor contact of the battery pack 1000 can be avoided.

[0055] As is known in related technologies, since the battery pack 1000 lacks a drainage structure, waterproofing relies on its own sealing properties and adjustments to its placement. Typically, the battery pack 1000 is avoided in locations with a high risk of water ingress, thus limiting its placement within the vehicle. However, in this application, because the outer wall 12 of the battery pack housing 100 is equipped with a drainage channel 31 for discharging accumulated water, the risk of water accumulation on the outer wall 12 of the battery pack housing 100 is reduced. This allows for more flexible placement of the battery pack 1000, resulting in a more rational arrangement within the vehicle.

[0056] In one embodiment, please refer to Figures 4 to 8 The drainage structure 3 includes a guide plate 32, which is disposed on the outer wall 12 of the housing 1 and on the same side of the housing 1 as the pole 2. The guide plate 32 has a guide surface 321 facing away from the housing 1. In the direction facing away from the pole 2, the guide surface 321 is inclined toward the side of the housing 1. The drainage channel 31 is disposed on the guide surface 321.

[0057] In this embodiment, the outer wall 12 of the housing 1 is provided with the guide plate 32, the guide plate 32 has a guide surface 321 facing away from the housing 1, and the drain channel 31 is provided on the guide surface 321. When the battery pack 1000 comes into contact with water or when there is dripping water on the battery pack 1000, the drain channel 31 can discharge the accumulated water in a direction away from the terminal post 2; at the same time, the inclined guide surface 321 causes the accumulated water on the guide surface 321 to flow in a direction away from the terminal post 2 due to its own gravity, thereby realizing the rapid directional discharge of accumulated water.

[0058] This application does not impose specific limitations on the tilt angle of the guide surface 321. In one embodiment, the angle θ between the guide surface 321 and the outer wall 12 of the housing 1 is set to 2° to 5°; thus, the water accumulated on the guide surface 321 is accelerated by its own gravity and flows away from the pole 2, thereby achieving rapid drainage of the water.

[0059] In one embodiment, please refer to Figures 4 to 8 The drainage structure 3 includes a plurality of protruding ribs 33 protruding from the outer wall 12 of the housing 1. The plurality of protruding ribs 33 are arranged side by side, and each protruding rib 33 extends in a direction away from the pole post 2. A drainage channel 31 is formed between two adjacent protruding ribs 33.

[0060] In this embodiment, a plurality of ribs 33 are provided on the outer wall 12 of the housing 1. Each rib 33 extends in a direction away from the pole post 2, and a drain channel 31 is formed between two adjacent ribs 33. In this way, when the battery pack 1000 comes into contact with water or when there is dripping water on the battery pack 1000, the water will flow into the drain channel 31 and be discharged.

[0061] In one embodiment, the drainage structure 3 includes a guide plate 32, which is disposed on the outer wall 12 of the housing 1 and on the same side as the pole post 2. The guide plate 32 has a guide surface 321 facing away from the housing 1. In the direction facing away from the pole post 2, the guide surface 321 is inclined toward the housing 1. A plurality of ribs 33 protrude from the guide surface 321.

[0062] This application does not impose specific restrictions on the arrangement of the ribs 33, as long as the ribs 33 extend in a direction away from the pole post 2, so that the drainage channel 31 between two adjacent ribs 33 can discharge the accumulated water in a direction away from the pole post 2.

[0063] Specifically, please refer to Figure 1 and Figure 4The terminal post 2 includes a positive terminal post 21 and a negative terminal post 22 arranged side by side in the first direction F1; a plurality of ribs 33 are located on one side of the terminal post 2 in the second direction F2, and the plurality of ribs 33 are arranged side by side in the first direction F1, with each rib 33 extending along the second direction F2; in this configuration, when the battery pack 1000 comes into contact with water or has dripping water, the drainage channel 31 can drain the accumulated water, thereby preventing water from accumulating on the outer wall 12 of the battery pack housing 100 and preventing water from flowing into the interior of the battery pack housing 100; at the same time, the drainage channel 31 extends in a direction away from the terminal post 2, thereby discharging the accumulated water away from the terminal post 2, thereby preventing the accumulated water from flowing to the terminal post 2 and causing metal corrosion to the terminal post 2.

[0064] This application does not impose specific limitations on the shape of the protruding rib 33. The cross-sectional outline of the protruding rib 33 can be square, arc-shaped, or irregular. In one embodiment, please refer to... Figures 7 to 9 The cross-sectional outline of the rib 33 is arc-shaped. On the side near the outer wall 12 of the box body 1, the side wall 331 of the rib 33 and the adjacent side wall 331 of the rib 33 are smoothly connected so that the cross-sectional outline of the drain channel 31 is arc-shaped.

[0065] It is understood that the cross-sectional outline of the rib 33 is arc-shaped. When there is water dripping on the battery pack 1000, the water droplets can easily slide down the side wall 331 of the rib 33 into the drain channel 31. At the same time, when the water is discharged along the drain channel 31, since the cross-sectional outline of the drain channel 31 is arc-shaped, all the water in the drain channel 31 can be discharged, avoiding water residue at the corners of the drain channel 31.

[0066] Furthermore, the drainage channel 31 has a drainage end 311 facing away from the pole post 2; near the drainage end 311, the height of the rib 33 gradually decreases in the direction facing away from the pole post 2. In this embodiment, accumulated water is discharged from the drainage end 311. Since the height of the rib 33 gradually decreases near the drainage end 311, when the accumulated water flows to the drainage end 311, the water in the multiple drainage channels 31 converges, thereby accelerating the drainage of the accumulated water.

[0067] It is known that when water droplets fall onto the outer wall 12 of the housing 1, the diameter of the water droplets is usually about 2.5 mm. In one embodiment, by setting the width W1 of the drainage channel 31 to 3 mm to 6 mm in the arrangement direction of the plurality of protruding ribs 33, the water droplets can adhere to the drainage channel 31, preventing the water droplets from flowing randomly between the drainage channels 31, thereby achieving directional discharge of accumulated water.

[0068] Please see Figures 1 to 3 The battery pack housing 100 also includes a liquid collection structure 4, which is disposed on the outer wall 12 of the housing 1 and located around the pole post 2. The liquid collection structure 4 forms a liquid collection tank 41, which is used to collect water accumulated on the battery pack 1000 when it encounters water. The liquid collection structure 4 is provided with a drain port 42 that communicates with the liquid collection tank 41. The drain structure 3 is located inside the liquid collection tank 41, and the drain channel 31 communicates with the drain port 42 to discharge the water accumulated in the liquid collection tank 41 from the drain port 42.

[0069] Although the drainage structure 3 is provided on the outer wall 12 of the housing 1, when there is a lot of water on the outer wall 12 of the housing 1, there is a risk that the water will flow to the pole 2. In this embodiment, by providing the liquid collection structure 4, the water can be collected in the liquid collection tank 41 and flow out from the liquid outlet 42 through the drainage channel 31, thereby preventing the water from flowing to the pole 2 and causing metal corrosion to the pole 2.

[0070] Specifically, the liquid collection structure 4 includes a plurality of liquid collection plates 43, which protrude from the outer wall 12 of the housing 1 and enclose to form the liquid collection trough 41. Among the plurality of liquid collection plates 43, there is a first plate 431 closest to the pole post 2. The drain port 42 is provided on any of the liquid collection plates 43 except for the first plate 431.

[0071] In this embodiment, by setting multiple liquid collecting plates 43, the liquid collecting tank 41 is formed by enclosing the multiple liquid collecting plates 43, which has a simple structure and is easy to assemble.

[0072] This application does not impose specific restrictions on the connection method of the multiple liquid collection plates 43. Preferably, two adjacent liquid collection plates 43 are fixed together by welding.

[0073] In one embodiment, the plurality of liquid collection plates 43 further include a second plate 432 disposed opposite to the first plate 431, the direction from the first plate 431 to the second plate 432 is set as a first direction F1, and the extension direction of the second plate 432 is set as a second direction F2; wherein, the drain port 42 is disposed on the second plate 432; the plurality of drain channels 31 are arranged along the second direction F2, and each drain channel 31 extends along the first direction F1.

[0074] Accumulated water flows out of the drain outlet 42 through multiple drainage channels 31. To ensure rapid drainage, in one embodiment, each drainage channel 31 has a drainage end 311 near the drain outlet 42, and the total width of the multiple drainage ends 311 is less than or equal to the width of the drain outlet 42. By setting the width of the drain outlet 42 to be greater than the width of the drainage ends 311, the accumulated water flowing out of the drainage ends 311 can be quickly discharged from the drain outlet 42.

[0075] In one embodiment, the second plate 432 is directly removed, thereby forming an opening on the liquid collection structure 4 that is opposite to the pole post 2, which is used to form the drain port 42, thus enabling rapid drainage of accumulated water.

[0076] As mentioned above, when water droplets fall onto the outer wall 12 of the housing 1, the diameter of the water droplets is usually about 2.5mm. By setting the height of the liquid collection plate 43 to 3mm to 6mm, it can be ensured that the liquid collection tank 41 can bear the dripping water droplets, preventing the water from flowing back across the liquid collection plate 43, thereby preventing the water from flowing back to the electrode 2 and causing metal corrosion to the electrode 2.

[0077] In one embodiment, the height of the rib 33 is less than the height of the liquid collection plate 43. In this way, even if there is a lot of water and it overflows the drain channel 31, it will not cross the liquid collection plate 43, thereby preventing the water from flowing back to the electrode 2 and causing metal corrosion to the electrode 2.

[0078] In one embodiment, please refer to Figure 1 The housing 1 includes a base 13 and a cover 14; the base 13 has a receiving groove 131 with an opening on one side for placing a battery module 200; the cover 14 is disposed on the base 13 and covers the opening of the receiving groove 131 to form a sealed receiving cavity 11; wherein, the terminal post 2 is disposed on the side of the cover 14 away from the base 13; the drain structure 3 is disposed on the side of the cover 14 away from the base 13.

[0079] In this embodiment, the base 13 and the cover 14 together form the sealed receiving cavity 11. The battery module 200 is placed in the receiving cavity 11. When the battery pack 1000 comes into contact with water or drips water, the sealing performance of the battery pack housing 100 itself can achieve waterproofing, preventing water from entering the receiving cavity 11 of the battery pack housing 100, thereby ensuring the stable operation of the battery pack 1000.

[0080] Secondly, embodiments of this application also provide a battery pack 1000. Please refer to... Figure 10The battery pack 1000 includes a battery pack housing 100 and a battery module 200. The battery module 200 is disposed within the receiving cavity 11 of the battery pack housing 100 and is electrically connected to the terminal post 2 on the battery pack housing 100. It should be noted that the battery pack housing 100 is configured as described above; that is, the battery pack housing 100 possesses all the technical features of the aforementioned battery pack housing 100, and thus, the battery pack 1000 includes all embodiments of the aforementioned battery pack housing 100.

[0081] When the battery pack 1000 comes into contact with water or drips water, there is a risk of water accumulating on the outer wall 12 of the battery pack housing 100. By providing a drainage structure 3 on the outer wall 12 of the battery pack housing 100, the accumulated water can be discharged from the drainage channel 31, thereby preventing water from accumulating on the outer wall 12 of the battery pack housing 100 and preventing water from flowing into the interior of the battery pack housing 100. At the same time, the drainage channel 31 extends away from the terminal post 2, which can discharge the accumulated water away from the terminal post 2, thereby preventing the accumulated water from flowing to the terminal post 2 and causing metal corrosion to the terminal post 2. In this way, on the one hand, the stable operation of the battery pack 1000 can be guaranteed, and on the other hand, poor contact of the battery pack 1000 can be avoided.

[0082] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery pack housing, characterized in that, include: A housing with an internal cavity for housing a battery module; an electrode post is provided on the outer wall of the housing, one end of which passes through the housing and is used for electrical connection with the battery module; and... A drainage structure is provided on the outer wall of the housing and is located on the same side of the housing as the electrode post. The drainage structure includes a drainage channel formed on the outer wall of the housing. The drainage channel extends in a direction away from the electrode post and drains the water accumulated on the outer wall of the housing in a direction away from the electrode post.

2. The battery pack housing according to claim 1, characterized in that, The drainage structure includes a guide plate, which is disposed on the outer wall of the housing and on the same side of the housing as the electrode post. The guide plate has a guide surface facing away from the housing, and the guide surface is inclined toward one side of the housing in the direction away from the electrode post. The drainage channel is located on the guide surface.

3. The battery pack housing according to claim 2, characterized in that, The angle between the guide surface and the outer wall of the box is set to 2° to 5°.

4. The battery pack housing according to claim 1, characterized in that, The drainage structure includes multiple ribs protruding from the outer wall of the box. The multiple ribs are arranged side by side, and each rib extends in a direction away from the pole post. A drainage channel is formed between two adjacent ribs.

5. The battery pack housing according to claim 4, characterized in that, The electrode includes a positive electrode and a negative electrode arranged side by side in a first direction; The plurality of ribs are located on one side of the pole in the second direction, the plurality of ribs are arranged side by side in the first direction, and each rib extends along the second direction.

6. The battery pack housing according to claim 4, characterized in that, The cross-sectional outline of the rib is arc-shaped. On the side near the outer wall of the box, the sidewall of the rib and the sidewall of the adjacent rib are smoothly connected so that the cross-sectional outline of the drainage channel is arc-shaped.

7. The battery pack housing according to claim 4, characterized in that, The drain channel has a drain end that is away from the electrode post; Near the drain end, the height of the rib gradually decreases in the direction away from the pole post.

8. The battery pack housing according to any one of claims 4 to 7, characterized in that, In the arrangement direction of the plurality of ribs, the width of the drainage channel is set to 3mm to 6mm.

9. The battery pack housing according to claim 1, characterized in that, The battery pack housing also includes a liquid collection structure, which is disposed on the outer wall of the housing and located around the electrode post. The liquid collection structure forms a liquid collection tank, which is used to collect water accumulated on the battery pack when the battery pack is exposed to water. The liquid collection structure is provided with a drain port that communicates with the liquid collection tank. The drainage structure is located inside the collection tank, and the drainage channel is connected to the drainage port to drain the accumulated water in the collection tank from the drainage port.

10. The battery pack housing according to claim 9, characterized in that, The liquid collection structure includes multiple liquid collection plates, which protrude from the outer wall of the housing and enclose to form the liquid collection trough. Among the multiple liquid collection plates, there is a first plate closest to the pole post. The drain outlet is located on any of the liquid collection plates other than the first plate.

11. The battery pack housing according to claim 10, characterized in that, The plurality of liquid collection plates also include a second plate disposed opposite to the first plate, wherein the direction from the first plate to the second plate is defined as a first direction, and the extending direction of the second plate is defined as a second direction; The drain outlet is located on the second plate. The plurality of drainage channels are arranged along the second direction, and each of the drainage channels extends along the first direction.

12. The battery pack housing according to claim 11, characterized in that, The drainage channel has a drainage end near the drainage port, and the total width of the plurality of drainage ends is less than or equal to the width of the drainage port.

13. The battery pack housing according to any one of claims 10 to 12, characterized in that, The height of the liquid collection plate is set to 3mm to 6mm.

14. The battery pack housing according to claim 1, characterized in that, The enclosure includes: A base having a receiving groove with an opening on one side for placing a battery module; and, A cover body, which is disposed on the base body and covers the opening of the receiving groove to form a sealed receiving cavity; The pole post is located on the side of the cover that is away from the base. The drainage structure is located on the side of the cover opposite to the seat.

15. A battery pack, characterized in that, include: Battery pack housing as described in any one of claims 1-14; as well as, A battery module is disposed within the receiving cavity of the battery pack housing and is electrically connected to the terminals on the battery pack housing.

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