Pressure balance mechanism, battery pack frame, battery pack and electric equipment

Abstract

The utility model belongs to the technical field of battery packs, and provides a pressure balance mechanism, a battery pack frame, a battery pack and electric equipment, the pressure balance mechanism mainly comprises a functional inner cavity and a hollow channel communicating the functional inner cavity with the outside, and the hollow channel is provided with a plurality of first via holes and second via holes; the first via hole is communicated with the outside and the interior of the hollow channel, and a blocking wall is arranged in the hollow channel and directly faces the first via hole; a waterproof ventilation valve is arranged on the first via hole; the second via hole is communicated with the interior of the hollow channel and the functional inner cavity, and the hollow channel forms at least one bend between the first via hole and the second via hole. According to the scheme, damp air is condensed and gathered on the blocking wall after passing through the waterproof ventilation valve, the damp air is prevented from directly reaching the functional inner cavity, and therefore the protection effect is further improved.

Description

Technical Field

[0001] The present application belongs to the technical field of battery packs, and specifically, relates to a pressure balancing mechanism, a battery pack frame, a battery pack and electrical equipment. Background Art

[0002] During the use of the battery pack, there will be changes in altitude and temperature, as well as temperature changes caused by heating or cooling of the battery cells, which will cause the air pressure inside and outside the whole pack to be unequal and need to be balanced to avoid deformation and damage to the box. The commonly used method is to install an explosion-proof air valve, which is embedded in the side wall of the box to directly connect the inside and outside of the whole pack; on the one hand, it is used for ventilation during normal use of the battery pack, and on the other hand, it can be used for rapid exhaust in the event of safety accidents such as thermal runaway in the battery pack. The ventilation function relies on the pore size of the microporous membrane being smaller than the diameter of a water droplet and much larger than the diameter of an air molecule, thereby achieving the function of being breathable and impermeable.

[0003] However, due to the characteristics of air permeability and watertightness, moist air can enter the box. During long-term use, condensation and liquid accumulation will form, which may cause electrical short circuits and other faults in the battery pack, posing a major safety hazard. Utility Model Content

[0004] In order to overcome at least one disadvantage of the above-mentioned prior art, the purpose of the present application is to provide a pressure balancing mechanism, a battery pack frame, a battery pack and an electrical device.

[0005] The technical means adopted by this application to solve the above technical problems are:

[0006] On the one hand, the embodiment of the present application provides a pressure balancing mechanism, including a functional inner cavity, a hollow channel connecting the functional inner cavity with the outside, and a plurality of first through holes and second through holes are provided on the hollow channel;

[0007] The first via hole connects the outside with the inside of the hollow channel, a blocking wall is arranged in the hollow channel facing the first via hole; a waterproof breathable valve is arranged on the first via hole;

[0008] The second via hole communicates with the interior of the hollow channel and the functional inner cavity, and the hollow channel has at least one bend formed between the first via hole and the second via hole.

[0009] In the embodiment scheme of the present application, the functional inner cavity can be connected with the outside world by setting the hollow channel, so as to facilitate the pressure balance between the functional inner cavity and the outside world; by setting the waterproof breathable valve on the first through hole, liquid water can be prevented from entering the functional inner cavity, thereby improving the protection effect of the functional components arranged in the functional inner cavity; by setting the blocking wall and forming at least one bend on the hollow channel, the humid air will condense and gather on the blocking wall after passing through the waterproof breathable valve, thereby preventing the humid air from directly reaching the functional inner cavity, thereby further improving the protection effect.

[0010] On the other hand, an embodiment of the present application provides a battery pack frame, in which the pressure balancing mechanism as described above is disposed.

[0011] In the embodiment of the present application, by applying the pressure balancing mechanism in the battery pack frame, the battery pack frame can not only realize the pressure balancing function, but also have a better application protection effect, thereby improving the safety performance of the battery pack frame in application.

[0012] In some embodiments, a plurality of frame beams are included, and the plurality of frame beams are connected in sequence to enclose the functional inner cavity.

[0013] In the embodiment of the present application, a frame structure of the battery pack frame can be formed by sequentially connecting a number of the frame beams, and the functional inner cavity can be enclosed.

[0014] In some embodiments, the hollow channel is disposed within the frame beam.

[0015] In the embodiment of the present application, by setting the hollow channel in the frame beam, the setting of the frame beam can be better utilized to achieve the integrated setting of waterproof and pressure balancing functions on the formed frame structure.

[0016] In some embodiments, the frame beam includes a transverse frame beam and a longitudinal frame beam, and the transverse frame beam and the longitudinal frame beam are connected from ends to form the hollow channel;

[0017] The first through hole is arranged on the transverse frame beam, and the second through hole is arranged on the longitudinal frame beam.

[0018] In the embodiment of the present application, by setting the first through hole on the transverse frame beam and setting the second through hole on the longitudinal frame beam, the setting of each frame beam can be better utilized, and the connection between the transverse frame beam and the longitudinal frame beam can be used as the formed bend.

[0019] In some embodiments, a plurality of the second through holes are arranged sequentially along the length direction of the longitudinal frame beam.

[0020] In the embodiment of the present application, by arranging the second through holes in sequence on the longitudinal frame beam, it is possible to conveniently control the distance from the functional components in the functional inner cavity to the hollow channel.

[0021] In some embodiments, water absorbing strips are provided in the transverse frame beam and / or the longitudinal frame beam.

[0022] In the embodiment of the present application, the water absorption strips are provided to facilitate the collection of condensed and aggregated water droplets.

[0023] In some embodiments, the bottom surface of the inner cavity of the transverse frame beam is lower than the bottom surface of the inner cavity of the longitudinal frame beam.

[0024] In the embodiment of the present application, by designing the bottom height of the inner cavity of different sections of the hollow channel, the protective effect can be further improved.

[0025] On the other hand, an embodiment of the present application provides a battery pack, in which the battery pack frame as described above is disposed.

[0026] In the embodiment scheme of the present application, by applying the battery pack frame as described above in the battery pack, it is possible to easily achieve pressure balance between the inner cavity where the battery module is located and the outside world, and at the same time, it is also possible to avoid potential dangers that may be caused by humid air directly acting on the battery module, thereby improving the application effect of the battery pack.

[0027] On the other hand, an embodiment of the present application provides an electrical device, in which the pressure balancing mechanism as described above is provided;

[0028] Or, a battery pack as described above is arranged therein.

[0029] In the embodiment scheme of the present application, by applying the pressure balancing mechanism or the battery pack to electrical equipment, such as a car, etc., it is convenient to improve the application performance of the electrical equipment, thereby improving market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 This is a schematic diagram of the cross-sectional structure of the transverse frame beam of this application.

[0032] Figure 2 This is a schematic diagram of the cross-sectional structure of the longitudinal frame beam of this application.

[0033] Figure 3 This is a schematic diagram of the internal structure of the battery pack of this application.

[0034] Marking Description:

[0035] 10- Functional cavity;

[0036] 20-hollow channel, 201-first through hole, 202-second through hole, 203-blocking wall, 204-bend;

[0037] 1-Waterproof breathable valve;

[0038] 2-frame beam, 21-transverse frame beam, 22-longitudinal frame beam;

[0039] 3-Battery module. DETAILED DESCRIPTION

[0040] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention, and the embodiments described are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present invention.

[0041] It should be noted that: unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. Similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0042] like Figure 1-3 As shown, this embodiment provides a pressure balancing mechanism, including a functional inner cavity 10 and a hollow channel 20; wherein the functional inner cavity 10 can be used for the installation and setting of functional components, and the hollow channel 20 is used to connect the functional inner cavity 10 with the outside world, so as to achieve internal and external pressure balance.

[0043] As one application example, a plurality of first via holes 201 and a plurality of second via holes 202 are provided on the hollow channel 10. The first via holes 201 are provided on the wall structure located on the outside of the hollow channel 20 to connect the outside with the inside of the hollow channel 20; the second via holes 202 are provided on the wall structure located on the inside of the hollow channel 20 to connect the inside of the hollow channel 20 with the functional inner cavity 10, thereby realizing the connection between the outside and the functional inner cavity 10.

[0044] In some embodiments, a waterproof breathable valve 1 is provided on the first through hole 201, and the waterproof breathable valve 1 can be an explosion-proof breathable valve. The waterproof breathable valve 1 can prevent liquid water from entering the hollow channel 20 and then entering the functional inner cavity 10, thereby improving the protection effect of the functional components provided in the functional inner cavity 10.

[0045] In some embodiments, a blocking wall 203 is provided in the hollow channel 20 opposite to the first via hole 201; for example, when the width of the hollow channel 20 is relatively large, the blocking wall 203 can be installed in a detachable manner so as to be installed in the hollow channel 20; and when the width of the hollow channel 20 meets the application requirements, the inner side wall relative to the side wall where the first via hole 201 is located can serve as the blocking wall 203.

[0046] By setting the blocking wall 203, the moist air will first condense and gather on the blocking wall 203 after passing through the waterproof breathable valve 1, thereby preventing the moist air from directly reaching the functional inner cavity 10, thereby further improving the protection effect.

[0047] In some embodiments, the hollow channel 20 is formed with at least one bend 204 between the first through hole 201 and the second through hole 202. The bend 204 can further extend the distance from the first through hole 201 to the second through hole 202 after the humid air enters, thereby reducing the influence of the humid air on the functional components disposed in the functional cavity 10.

[0048] In addition, this embodiment provides a battery pack frame, and the pressure balancing mechanism as described above is arranged in the battery pack frame. By applying the pressure balancing mechanism in the battery pack frame, the battery pack frame can not only realize the pressure balancing function, but also play a better application protection effect, thereby improving the safety performance of the battery pack frame in the application.

[0049] As an example of one application, Figure 3As shown, the battery pack frame includes a plurality of frame beams 2, and the plurality of frame beams 2 are connected in sequence to form a frame structure and enclose the functional inner cavity 10; at this time, a battery module 3 can be arranged in the enclosed functional inner cavity 10, and the formed frame structure serves as a lateral enclosure for the battery module 3.

[0050] As one application example, the hollow channel 20 is arranged in the frame beam 2. By arranging the hollow channel 20 in the frame beam 2, the arrangement of the frame beam 2 can be better utilized to achieve the integrated arrangement of waterproof and pressure balancing functions on the frame structure.

[0051] In some embodiments, the frame beam 2 includes a transverse frame beam 21 and a longitudinal frame beam 22 , and the transverse frame beam 21 is connected to the longitudinal frame beam 22 from ends to form the hollow channel 20 therein.

[0052] In some embodiments, the hollow channel 20 can be formed based on a transverse frame beam 21 and a longitudinal frame beam 22. At this time, the transverse frame beam 21 and the longitudinal frame beam 22 are connected to form an "L" shape, and the formed hollow channel 20 is also "L" shaped.

[0053] In some embodiments, the hollow channel 20 can be formed based on one transverse frame beam 21 and two longitudinal frame beams 22. In this case, the transverse frame beam 21 and the longitudinal frame beam 22 are connected to form a "U" shape, and the hollow channel 20 formed is also "U" shaped. In addition, it is convenient to realize the symmetrical arrangement of the hollow channel 20.

[0054] In some embodiments, the hollow channel 20 may be formed based on the entire frame structure, so that the formed hollow channel 20 is ring-shaped.

[0055] As one application example, a plurality of first through holes 201 are provided on the outer wall of the transverse frame beam 21 to connect the outside with the inner cavity of the transverse frame beam 21. At this time, the inner wall of the transverse frame beam 21 acts as the blocking wall 203. Figure 1 As shown; a plurality of second through holes 202 are provided on the inner wall of the longitudinal frame beam 22 to connect the inner cavity of the longitudinal frame beam 22 with the functional inner cavity 10; at the connection between the transverse frame beam 21 and the longitudinal frame beam 22, the inner cavities of the two are connected, and the bend 204 is formed at the connection, as shown Figure 3 shown.

[0056] At this time, the waterproof breathable valve 1 is arranged on the transverse frame beam 21, and when the humid air enters the inner cavity of the transverse frame beam 21 from the waterproof breathable valve 1, it will contact the inner wall of the transverse frame beam 21, thereby condensing and gathering, and when the humid air continues to move forward, it will contact the outer wall of the inner cavity of the longitudinal frame beam 22, and continue to condense and gather. Therefore, the path of the humid space to reach the functional inner cavity 10 can be effectively extended, thereby reducing or even avoiding the influence of humid air on the functional components in the functional inner cavity 10, and the design is ingenious.

[0057] In some embodiments, a plurality of the second vias 202 are arranged in sequence along the length direction of the longitudinal frame beam 22; so that when thermal runaway occurs in the battery module 3 in the functional cavity 10, the thermal runaway products can enter the corresponding second vias 202 nearby, and then enter the hollow channel 20, and finally be output from the waterproof breathable valve 1; at this time, the residence time of the thermal runaway products in the functional cavity 10 can be reduced, thereby reducing the thermal runaway propagation rate and gaining more reaction time.

[0058] As an optional application example, a water absorption strip may be provided in the inner cavity of the transverse frame beam 21 and / or the longitudinal frame beam 22. The water absorption strip may facilitate the collection of condensed and aggregated water droplets.

[0059] In some embodiments, the inner cavity bottom surface of the transverse frame beam 21 can be set to be lower than the inner cavity bottom surface of the longitudinal frame beam 22. After the humid air condenses and gathers on the inner wall of the transverse frame beam 21, it will be concentrated on the inner cavity bottom surface of the transverse frame beam 21, thereby preventing water droplets from flowing to the inner cavity bottom surface of the longitudinal frame beam 22, and shortening the distance between the water vapor and the second through hole 202.

[0060] Furthermore, the present embodiment provides a battery pack, in which the battery pack frame as described above is provided. By applying the battery pack frame as described above in the battery pack, it is easy to achieve pressure balance between the inner cavity where the battery module is located and the outside, and it is also possible to avoid potential dangers that may be caused by humid air directly acting on the battery module, thereby improving the application effect of the battery pack.

[0061] On the other hand, this embodiment also provides an electric device, in which the pressure balancing mechanism or the battery pack as described above is arranged. By applying the pressure balancing mechanism or the battery pack to electric devices, such as automobiles, etc., it is convenient to improve the application performance of the electric device, thereby improving market competitiveness.

[0062] The above description is only a specific implementation mode of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should also be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection of the claims.

[0063] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A pressure balancing mechanism, characterized in that: It includes a functional inner cavity and a hollow channel connecting the functional inner cavity with the outside, and the hollow channel is provided with a plurality of first through holes and second through holes; The first via hole connects the outside with the inside of the hollow channel, a blocking wall is arranged in the hollow channel facing the first via hole; a waterproof breathable valve is arranged on the first via hole; The second via hole communicates with the interior of the hollow channel and the functional inner cavity, and the hollow channel has at least one bend formed between the first via hole and the second via hole.

2. A battery pack frame, characterized in that: A pressure balancing mechanism as claimed in claim 1 is arranged therein.

3. The battery pack frame according to claim 2, characterized in that: It comprises a plurality of frame beams which are connected in sequence to enclose the functional inner cavity.

4. The battery pack frame according to claim 3, characterized in that: The hollow channel is disposed within the frame beam.

5. The battery pack frame according to claim 4, characterized in that: The frame beam comprises a transverse frame beam and a longitudinal frame beam, and the transverse frame beam and the longitudinal frame beam are connected from ends to form the hollow channel; The first through hole is arranged on the transverse frame beam, and the second through hole is arranged on the longitudinal frame beam.

6. The battery pack frame according to claim 5, characterized in that: A plurality of the second through holes are arranged in sequence along the length direction of the longitudinal frame beam.

7. The battery pack frame according to claim 5, characterized in that: Water absorbing strips are arranged inside the transverse frame beam and / or the longitudinal frame beam.

8. The battery pack frame according to claim 5 or 7, characterized in that: The inner cavity bottom surface of the transverse frame beam is lower than the inner cavity bottom surface of the longitudinal frame beam.

9. A battery pack, characterized in that: A battery pack frame as described in any one of claims 2 to 8 is arranged therein.

10. An electrical device, characterized in that: A pressure balancing mechanism as described in claim 1 is arranged therein; Or, a battery pack as described in claim 9 is arranged therein.

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