Battery pack and vehicle

Abstract

The present invention proposes a battery pack and a vehicle having the battery pack, wherein the battery pack includes a box body and a water-absorbing pad, wherein a accommodating space is formed inside the box body, a guide channel is provided on the box body, and the water-absorbing pad is provided in the accommodating space, wherein the water-absorbing pad is used to absorb moisture in the accommodating space, wherein the water-absorbing pad extends to the guide channel so that the moisture absorbed by the water-absorbing pad can be discharged into the guide channel, and wherein the guide channel is used to guide the moisture to a predetermined position, thereby reducing the humidity in the accommodating space, reducing water accumulation, preventing the battery pack from having an internal short circuit due to water accumulation, and improving the safety of the vehicle.

Description

Technical Field

[0001] The present invention relates to the field of electric vehicles, and in particular to a battery pack and a vehicle having the battery pack. Background Art

[0002] The battery pack box needs to meet sealing requirements to prevent water vapor from entering the box and forming water accumulation, which may cause a short circuit in the battery inside the box.

[0003] It is difficult to completely prevent water vapor from entering the box in the prior art, especially when the box structure or sealing material is aged, water vapor is more likely to enter the box and form water accumulation. Water accumulation may also be caused by battery leakage, resulting in safety risks. Summary of the invention

[0004] The present invention aims to solve the technical problem of water accumulation in the box of a battery pack in the prior art.

[0005] In one aspect, the present invention provides a battery pack, comprising:

[0006] A box body, an accommodating space is formed inside, and the box body is provided with a flow guide channel;

[0007] A water-absorbing pad, disposed in the accommodating space and extending to the guide channel, the water-absorbing pad being used to absorb the water in the accommodating space and discharge the water into the guide channel;

[0008] The guide channel is used to guide the moisture to a predetermined position.

[0009] In one embodiment, the box body includes a tray and a cover plate, the tray and the cover plate are enclosed to form the accommodating space, and the guide channel is arranged on the tray;

[0010] The battery pack comprises:

[0011] A battery, disposed on the tray;

[0012] A cooling plate is located in the accommodating space and is arranged on a side of the battery away from the tray;

[0013] The water absorbent pad is at least partially attached to a side of the cooling plate facing away from the battery.

[0014] In one embodiment, the absorbent pad covers a side of the cooling plate facing away from the battery.

[0015] In one embodiment, the guide channel has an inlet communicated with the accommodating space, the inlet is opened on the tray and forms a gap with the battery, and the water absorbent pad extends to the inlet.

[0016] In one embodiment, a guide groove is provided on a side of the water absorbent pad facing away from the cooling plate, and the guide groove extends to the guide channel.

[0017] In one embodiment, the lowest point of the water absorbent pad is located in the flow guiding channel.

[0018] In one embodiment, the diversion channel has an outlet communicating with the outside, and the predetermined position is the outlet.

[0019] In one embodiment, the battery pack is provided with a discharge member, the predetermined position is the discharge member, and the discharge member is used to discharge the moisture out of the box.

[0020] In one embodiment, the discharge member is a one-way valve.

[0021] In one embodiment, the battery pack is further provided with a water pump, and the water pump is connected to the discharge member.

[0022] In one embodiment, the cover plate is further provided with a breathable member, and the breathable member is arranged at an end of the cover plate away from the predetermined position.

[0023] In one embodiment, the breathable member is a waterproof breathable membrane.

[0024] On the other hand, the present invention provides a vehicle, comprising the battery pack.

[0025] In summary, the present invention provides a battery pack and a vehicle having the battery pack, wherein the battery pack includes a box body and a water-absorbing pad, a accommodating space is formed inside the box body, a guide channel is provided on the box body, and the water-absorbing pad is provided in the accommodating space, the water-absorbing pad is used to absorb moisture in the accommodating space, the water-absorbing pad extends to the guide channel, so that the moisture absorbed by the water-absorbing pad can be discharged into the guide channel, and the guide channel is used to guide the moisture to a predetermined position, thereby reducing the humidity in the accommodating space, reducing water accumulation, preventing the battery pack from internal short circuit due to water accumulation, and improving the safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 A front view of a battery pack according to an embodiment of the present invention;

[0028] Figure 2 for Figure 1 The internal meaning diagram of the battery pack shown;

[0029] Figure 3A schematic diagram of an absorbent pad according to an embodiment of the present invention.

[0030] Reference numerals:

[0031] Battery pack 1;

[0032] Shell 10, tray 101, cover plate 103, accommodating space 11, flow guide channel 13, inlet 131, outlet pipe 133, battery 15, cooling plate 17;

[0033] Water absorption pad 20, guide groove 21;

[0034] A discharge member 30, a discharge member first end 31, and a discharge member second end 32;

[0035] Breathable member 40;

[0036] Humidity monitoring build 50. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which 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.

[0038] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", etc. 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] Before describing the embodiments in detail, it should be understood that the present invention is not limited to the detailed structure or component arrangement described below or in the accompanying drawings in this application. The present invention may be an embodiment implemented in other ways. In addition, it should be understood that the words and terms used herein are only used for descriptive purposes and should not be interpreted restrictively. The words "including", "comprising", "having" and the like used herein are intended to include the items listed thereafter, their equivalents and other additional items. In particular, when describing "a certain element", the present invention does not limit the number of the element to one, but may also include multiple elements.

[0040] The present invention provides a battery pack for a vehicle, which can supply power to the vehicle. The vehicle can be an electric vehicle, and the battery pack is placed on the chassis of the vehicle to stably provide sufficient power for the electric vehicle, and has good safety performance.

[0041] like Figures 1 to 3As shown, the battery pack 1 includes a box body 10 and a water-absorbing pad 20. The box body 10 has a receiving space 11 formed therein. The box body 10 is provided with a guide channel 13. The water-absorbing pad 20 is arranged in the receiving space 11 and extends to the guide channel 13. The water-absorbing pad 20 is used to absorb the moisture in the receiving space 11 to discharge the moisture into the guide channel 13. It should be understood that the water-absorbing pad 20 can be made of sponge, polyester and other materials. The present invention is not limited to this, as long as the water-absorbing pad 20 can absorb water vapor and / or liquid water. The guide channel 13 is used to guide the moisture to a predetermined position.

[0042] The water-absorbing pad 20 can be attached to the inner surface of the housing 10 to absorb the water condensed on the inner surface of the housing 10. Figure 2 In the illustrated embodiment, the box 10 includes a tray 101 and a cover plate 103, the tray 101 and the cover plate 103 enclose a receiving space 11, and the guide channel 13 is arranged on the tray 101. The battery pack 1 includes a battery 15 and a cooling plate 17 located in the receiving space 11. It should be understood that the receiving space 11 can accommodate a plurality of batteries 15 connected in series and in parallel, or only one battery 15. The battery 15 is arranged on the tray 101. Preferably, one side of the battery 15 is fixed to the tray 101 to prevent the battery 15 from shaking relative to the box 10, thereby improving the structural stability of the battery pack 1.

[0043] The cooling plate 17 is disposed on the side of the battery 15 away from the tray 101, that is, the battery 15 is located between the cooling plate 17 and the tray 101, so that the cooling plate 17 can transfer heat with the battery 15 to cool the battery 15. It should be understood that the cooling plate 17 can transfer heat by contacting the side of the battery 15 away from the tray 101, or by providing a thermal conductive adhesive between the cooling plate 17 and the battery 15. The present invention is not limited to this, as long as the cooling plate 17 is disposed on the side of the battery 15 away from the tray 101 and can transfer heat with the battery 15.

[0044] In this embodiment, the cooling plate 17 is a liquid cooling plate, and the heat of the battery 15 is removed by using the internal coolant as a medium. However, this is only one implementation of the present invention, and the present invention does not limit the type of the cooling plate 17.

[0045] In this embodiment, the water absorbent pad 20 is at least partially attached to the side of the cooling plate 17 away from the battery 15, and extends to the guide channel 13. The temperature of the cooling plate 17 is low, and the water vapor in the accommodating space 11 forms condensed water after encountering the cooling plate 17. The water absorbent pad 20 can absorb the condensed water under the action of capillary suction, and discharge the condensed water into the guide channel 13 at a lower position under the action of gravity, so as to prevent the water vapor from forming water accumulation on the liquid cooling plate 17.

[0046] In this embodiment, the water absorbent pad 20 covers the side of the cooling plate 17 away from the battery 15, which can not only prevent the formation of water accumulation on the surface of the cooling plate 17 away from the battery 15, but also play a role in heat insulation for the cooling plate 17, preventing the ambient temperature from affecting the cooling effect of the cooling plate 17 on the battery 15. It should be understood that the water absorbent pad 20 covers the side of the cooling plate 17 away from the battery 15, which is only an embodiment of the present invention. In one embodiment, the water absorbent pad 20 only covers part of the cooling plate 17, and the cooling plate 17 is designed to be inclined toward the part covered by the water absorbent pad 20, so that the condensed water formed on the part of the cooling plate 17 not covered by the water absorbent pad 20 flows to the water absorbent pad 20 under the action of gravity. Further, the part of the side of the cooling plate 17 away from the battery 15 that is not covered by the water absorbent pad 20 is provided with a collecting groove (not shown), and the condensed water is guided to the water absorbent pad 20 through the collecting groove. The present invention does not limit the arrangement of the water absorbent pad 20 on the cooling plate 17 , as long as the water absorbent pad 20 is at least partially attached to the side of the cooling plate 17 away from the battery 15 and can absorb the condensed water on the cooling plate 17 .

[0047] In the illustrated embodiment, the guide channel 13 is formed in the tray 101, and the guide channel 13 has an inlet 131 connected to the accommodating space 11. The inlet 131 is opened on the tray 101 and is spaced from the battery 15 to prevent the battery from covering the inlet 131. The absorbent pad 20 extends to the inlet 131, so as to discharge the absorbed water into the guide channel 13. The absorbent pad 20 extends to the inlet 131, and the lowest point of the absorbent pad 20 can be located above the inlet 131, or the lowest point of the absorbent pad 20 can be flush with the inlet 131. The water absorbed by the absorbent pad 20 forms water droplets through the action of gravity and drips into the guide channel 13.

[0048] It should be understood that “the water absorbent pad 20 extends to the inlet 131” is only one embodiment of “the water absorbent pad 20 extends to the guide channel 13”, and “the water absorbent pad 20 extends to the guide channel 13” also includes that the lowest point of the water absorbent pad 20 is located in the guide channel 13. The present invention is not limited to this, as long as the water absorbed by the water absorbent pad 20 can be discharged into the guide channel 13 under the action of gravity.

[0049] like Figure 3As shown, a guide groove 21 is provided on the side of the water absorbent pad 20 facing away from the cooling plate 17, and the guide groove 21 extends to the guide channel 13. A plurality of guide grooves 21 may be provided, and the plurality of guide grooves 21 are connected in a direction perpendicular to the extension direction of the water absorbent pad 20. Condensed water may condense on the inner surface of the cover plate 103, and the condensed water may drip on the upper surface of the water absorbent pad 20 (i.e., the surface of the water absorbent pad 20 facing away from the cooling plate 17). Part of the condensed water is absorbed by the water absorbent pad 20, and the other part that is not absorbed may be collected in the guide groove 21. The guide groove 21 may guide the unabsorbed condensed water into the guide channel 13, thereby playing a guiding role.

[0050] like Figure 1 In the illustrated embodiment, the battery pack is provided with a discharge member 30, the discharge member 30 having a first end 31 and a second end 32, the first end 31 being an end of the discharge member 30 connected to the guide channel 13, the second end being an end of the discharge member 30 connected to the outside, the predetermined position being the discharge member 30, and the discharge member 30 being used to discharge the moisture (including vapor water and liquid water) guided through the guide channel 13 out of the box body 10.

[0051] In this embodiment, the discharge member 30 is a one-way valve, so that gas and liquid can be discharged from the first end 31 of the discharge member 30 to the outside of the housing 10, while the gas and liquid outside the housing 10 cannot enter the accommodating space 11 from the second end 32 of the discharge member 30. Figure 1 , an outlet pipe 133 extends outward from the shell 10, the outlet pipe 133 is connected to the guide channel 13, and the discharge member 30 is installed to the end of the outlet pipe 133 away from the shell 10, so that the first end 31 of the discharge member 30 is connected to the outlet pipe 133, thereby realizing the communication between the discharge member 30 and the guide channel 13. It should be understood that the connection between the guide channel 13 and the discharge member 30 through the outlet pipe 133 is only an embodiment of the present invention. In other embodiments, the outlet pipe 133 may not be provided. For example, the guide channel 13 has an outlet (not shown) opened on the shell 10 facing the outside, and the discharge member 30 is provided on the shell 10 to cover the outlet and directly communicated with the guide channel 13. The present invention does not limit the specific way of how the discharge member 30 and the guide channel 13 are connected.

[0052] In the illustrated embodiment, the battery pack is further provided with a water pump (not shown), which is connected to the second end 32 of the discharge member 30. The water pump can pump out the gas and liquid in the accommodating space 11 through the guide channel 13 through the discharge member 30. Under the action of the water pump, the water in the accommodating space 11 is more efficiently discharged. However, this is only one embodiment of the present invention. In other embodiments, the battery pack 1 may not be provided with a one-way valve 30 and a water pump, so that the guide channel 13 has an outlet connected to the outside (not shown), and the predetermined position is the outlet, and the water in the guide channel 13 can also be guided to the outlet for discharge. The present invention does not limit the way in which the guide channel 13 is discharged outward.

[0053] In the illustrated embodiment, the tray 101 is sealedly connected to the cover plate 103. In order to guide the gas and / or liquid in the accommodating space 11 to the predetermined position (such as the above-mentioned outlet and discharge member) through the guide channel 13, the cover plate 103 is further provided with a breathable member 40. The breathable member 40 is arranged at one end of the cover plate 103 away from the predetermined position, so that there is a long distance between the breathable member 40 and the predetermined position, which can improve the effect of discharging moisture in the accommodating space 11. Preferably, the breathable member 40 and the predetermined position are respectively located at the two ends of the housing 10 in the length direction, such as Figure 1 As shown, the air permeable member 40 and the discharge member 30 are respectively located at both ends of the shell 10 in length, and the air permeable member 40 is located on the cover plate 103, while the discharge member 30 is located at the bottom of the shell 10, so that the moisture in the accommodating space 11 can be discharged more thoroughly.

[0054] In this embodiment, the breathable member 40 is a waterproof breathable membrane, such as a polytetrafluoroethylene microporous membrane, so that water is prevented from entering the accommodating space 11 from the breathable member 40 while ensuring that the gas and / or liquid in the accommodating space 11 can be discharged from the above-mentioned outlet or discharge member 30.

[0055] In order to more effectively drain the moisture in the accommodating space 11, the battery pack 1 also includes a water level monitoring component (not shown), which is arranged in the diversion channel 13 or the outlet pipe 133 to monitor the amount of liquid in the diversion channel 13 and to provide timely warning. The water level monitoring component can be constructed as a water level sensor. The water level monitoring component is connected to the battery management system for communication. When the amount of liquid in the diversion channel 13 exceeds the preset water level warning value, the battery management system controls the discharge member 30 to open, and then controls the water pump to work, while pumping water and air.

[0056] Furthermore, the battery pack 1 further includes a humidity monitoring component 50 that is communicatively connected to the battery management system, and the humidity monitoring component 50 is used to monitor the humidity in the accommodating space 11. Figure 1As shown, the humidity monitoring component 50 is disposed on the cover plate 103. When the humidity of the accommodating space 11 monitored by the humidity monitoring component 50 exceeds the humidity warning value, the humidity monitoring component 50 transmits a signal to the battery management system, thereby issuing an early warning. The battery management system controls the discharge member 30 and the water pump to work, dehumidify and ventilate.

[0057] Under the action of the water pump, external air enters the accommodating space 11 through the air permeable member 40, and prevents external moisture from entering the accommodating space 11. The water pump extracts moisture or accumulated water in the accommodating space 11, speeding up the air flow in the accommodating space 11 to dry and take away the water vapor in the accommodating space 11. When the warnings of the humidity monitoring component 50 and the water level monitoring component are eliminated at the same time, the battery management system issues a command to control the discharge member 30 and the water pump to be turned off.

[0058] The present invention also includes a vehicle (not shown) comprising the battery pack 1 described above.

[0059] According to the vehicle of the present invention, the water absorbent pad 20 can collect the moisture in the accommodating space 11 into the guide channel 13, effectively reducing the humidity in the accommodating space 11, avoiding internal short circuit of the battery pack 1 due to water accumulation, and improving the safety performance of the vehicle.

[0060] The concepts described herein may be implemented in other forms without departing from their spirit and characteristics. The specific embodiments invented should be considered illustrative rather than restrictive. Therefore, the scope of the present invention is determined by the appended claims rather than by the preceding description. Any changes within the literal meaning and equivalent scope of the claims should fall within the scope of these claims.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0062] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A battery pack, characterized in that: include: A box body, the box body comprising a tray and a cover plate, the tray and the cover plate enclose a containing space, and a guide channel is provided on the tray; A water-absorbing pad, disposed in the accommodating space and extending to the guide channel, the water-absorbing pad being used to absorb the water in the accommodating space and discharge the water into the guide channel; The guide channel is used to guide the water to a predetermined position; A battery, disposed on the tray; A cooling plate is located in the accommodating space and is arranged on a side of the battery away from the tray; The water absorbent pad is at least partially attached to a side of the cooling plate facing away from the battery; A guide groove is provided on a side of the water-absorbing pad facing away from the cooling plate, and the guide groove extends to the guide channel; The guide grooves are provided in plurality, and the plurality of guide grooves are connected along a direction perpendicular to the extending direction of the water absorbent pad.

2. The battery pack according to claim 1, characterized in that: The absorbent pad covers a side of the cooling plate facing away from the battery.

3. The battery pack according to claim 1, wherein: The guide channel has an inlet communicated with the accommodating space, the inlet is opened on the tray and forms a gap with the battery, and the water absorption pad extends to the inlet.

4. The battery pack according to claim 1, wherein: The lowest point of the water-absorbing pad is located in the flow-guiding channel.

5. The battery pack according to claim 1, wherein: The guide channel has an outlet communicating with the outside, and the predetermined position is the outlet.

6. The battery pack according to claim 1, wherein: The battery pack is provided with a discharge member, the predetermined position is the discharge member, and the discharge member is used to discharge the moisture from the box body.

7. The battery pack according to claim 6, characterized in that: The discharge member is a one-way valve.

8. The battery pack according to claim 6, wherein: The battery pack is also provided with a water pump, and the water pump is communicated with the discharge member.

9. The battery pack according to claim 1, characterized in that: The cover plate is also provided with a breathable member, and the breathable member is arranged at one end of the cover plate away from the predetermined position.

10. The battery pack according to claim 9, characterized in that: The breathable member is a waterproof breathable membrane.

11. A vehicle, characterized in that: A battery pack comprising the battery pack as claimed in any one of claims 1 to 10.

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