A battery pack and an electric device

Abstract

The utility model relates to battery pack technical field discloses a kind of battery pack and electrical equipment, battery pack includes: border beam, including the first plate part and second plate part arranged along second direction, and the other end of first plate part and the other end of second plate part are interval arranged to form opening;First plate part and second plate part between have cavity with opening communication;Baffle, extend along second direction and connect in the one end of first plate part close to opening;Guard plate, with the one end of second plate part close to opening is connected, and baffle and guard plate form collection cavity between;And sealing element, have avoidance groove;Second plate part has shielding part and the projection along second direction at least part is located in avoidance groove.The battery pack and electrical equipment of the utility model, opening and sealing element overlap arrangement reduce the space required by border beam end face, and by the setting of shielding part, even if size is smaller still can keep sealing effect after sealing element opens avoidance groove and avoids opening.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a battery pack and an electrical device. Background Technology

[0002] Battery packs require defined venting channels to promptly release high-temperature, high-pressure gases in the event of a single battery cell valve explosion. Because the explosion-proof valves are located on the side beams, existing battery pack enclosures typically utilize the internal space of the side beams as part of the venting channel, while simultaneously providing another venting channel extending from the middle of the battery pack to the side beams and connecting to their internal space. Therefore, a separate opening is often created at the top or bottom of the side beams to connect the two venting channels, sacrificing some area in that region. Furthermore, the top or bottom of the side beams is also the sealing connection point with the cover or bottom panel; to ensure airtightness, the sealing strip must be wide enough, necessitating a sufficiently large area to accommodate both the sealing strip and the opening, which is detrimental to the utilization of battery pack space. Utility Model Content

[0003] The purpose of this invention is to provide a battery pack and electrical equipment that can ensure the overall sealing effect of the electrical equipment even when the size of the sealing component is reduced.

[0004] To achieve the above objectives, in a first aspect, this utility model provides a battery pack having a first direction and a second direction perpendicular to each other, comprising:

[0005] The side beam includes a first plate portion and a second plate portion arranged along the second direction. Along the first direction, one end of the first plate portion and one end of the second plate portion are connected to each other, and an opening is formed between the other ends of the first plate portion and the other ends of the second plate portion at intervals. A cavity communicating with the opening is provided between the first plate portion and the second plate portion.

[0006] A partition extends along the second direction and is connected to one end of the first plate near the opening;

[0007] A protective plate, extending along the second direction and disposed on one side of the partition along the first direction, is connected to the end of the second plate near the opening, and a collection cavity is formed between the partition and the protective plate; and

[0008] The seal has a clearance groove;

[0009] The sealing element is located between the protective plate and the second plate, and the clearance groove is correspondingly provided with the opening so that the cavity communicates with the collection cavity;

[0010] The second plate portion has a blocking portion at one end along the first direction, and along the second direction, the blocking portion and the clearance groove at least partially overlap in their orthogonal projections onto a reference plane; wherein the reference plane is perpendicular to the second direction.

[0011] In some embodiments, the shielding portion is connected to the seal, and along the second direction, the orthographic projection of the shielding portion on the reference plane completely covers the orthographic projection of the clearance groove on the reference plane.

[0012] In some embodiments, the device further includes fasteners that are sequentially disposed on the protective plate, the seal, and the second plate portion; and the fasteners are spaced apart from the clearance groove and the shielding portion.

[0013] In some embodiments, the number of fasteners is multiple and arranged along the periphery of the guard plate, and the opening is located between two adjacent fasteners along the fastener arrangement direction.

[0014] In some embodiments, the number of openings is multiple; the openings and the fasteners are alternately arranged along the fastener arrangement direction.

[0015] In some embodiments, along the first direction, the height of the shielding portion is less than or equal to the thickness of the seal.

[0016] In some embodiments, the first plate portion, the second plate portion, and the shielding portion are integrally formed.

[0017] In some embodiments, the orthographic projection of the shielding portion along the first direction is at least partially located on the protective plate.

[0018] In some embodiments, an explosion-proof valve is further included; the second plate portion has a pressure relief hole extending along the second direction, the pressure relief hole communicating with the cavity, and the explosion-proof valve is installed in the pressure relief hole.

[0019] In a second aspect, this utility model provides an electrical device, including the battery pack provided in the first aspect.

[0020] This utility model provides a battery pack and an electrical device, which have the following advantages compared with the prior art:

[0021] The side beam includes a first plate portion and a second plate portion arranged along the second direction, the first plate portion and the second plate portion being connected to each other at one end along the first direction, and the other ends of the two portions being spaced apart to form an opening; a cavity communicating with the opening is provided between the first plate portion and the second plate portion; a partition plate extending along the second direction and connected to the end of the first plate portion near the opening; a guard plate extending along the second direction and disposed on one side of the partition plate along the first direction, the guard plate being connected to the end of the second plate portion near the opening, and a collection cavity being formed between the partition plate and the guard plate; and a sealing member having a clearance groove; wherein the sealing member is located between the guard plate and the second plate portion, and the clearance groove is correspondingly disposed with the opening so that the cavity communicates with the collection cavity; the second plate portion has a blocking portion at one end along the first direction, and along the second direction, the orthographic projection of the blocking portion on a reference plane perpendicular to the first direction at least partially overlaps with the orthographic projection of the clearance groove on the reference plane. In this way, the collection chamber is connected to the cavity through the clearance groove and the opening to form an exhaust channel. By directly opening the clearance groove on the seal to avoid the opening, it is equivalent to the opening overlapping the seal. Compared with the method of setting the seal and the opening separately, the required end face area of ​​this part of the side beam can be reduced, thereby improving the space utilization of the battery pack. In addition, the shielding part can cover the area of ​​the seal that is narrowed due to the clearance groove, which can minimize the impact of the external environment on this area and cause the sealing effect to weaken and the life of the battery pack to decline, thus ensuring the overall sealing effect of the battery pack. Attached Figure Description

[0022] Figure 1 This is a top view of the battery pack provided in an embodiment of the present invention.

[0023] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure along direction A.

[0024] Figure 3 for Figure 2 A partially enlarged front view of the central beam.

[0025] Figure 4 for Figure 2 A partially enlarged axial side structural diagram of the middle beam.

[0026] Figure 5 This is a partial three-dimensional magnified structural diagram of the battery pack provided in an embodiment of the present utility model, viewed from below.

[0027] In the diagram: 1. Side beam; 11. First plate; 12. Second plate; 121. Shielding part; 122. Pressure relief hole; 13. Cavity; 14. Opening; 2. Partition; 3. Protective plate; 31. Collection chamber; 4. Seal; 41. Circumvention groove; 5. Fastener; 6. Explosion-proof valve; Z, First direction; X, Second direction. Detailed Implementation

[0028] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0029] It should be understood that in the description of this application, the terms "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. That is, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Furthermore, unless otherwise stated, "a plurality of" means two or more.

[0030] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0031] like Figures 1-5 As shown, the battery pack of some embodiments of this utility model has a first direction Z and a second direction X perpendicular to each other. The battery pack includes: a side beam 1, a partition 2, a protective plate 3, and a sealing member 4. The side beam 1 includes a first plate portion 11 and a second plate portion 12 arranged along the second direction X. Along the first direction Z, one end of the first plate portion 11 and one end of the second plate portion 12 are connected to each other. The other ends of the first plate portion 11 and the other ends of the second plate portion 12 are spaced apart to form openings 14. A cavity 13 communicating with the opening 14 is provided between the first plate portion 11 and the second plate portion 12. The cavity 13 serves as a section of the battery pack's exhaust channel.

[0032] The separator 2 extends along the second direction X and is connected to the end of the first plate portion 11 near the opening 14. The protective plate 3 extends along the second direction X and is disposed on the side of the separator 2 along the first direction Z. The protective plate 3 is connected to the end of the second plate portion 12 near the opening 14, and a collection cavity 31 is formed between the separator 2 and the protective plate 3. In use, the battery cell is disposed on the side of the separator 2 away from the protective plate 3, and the separator 2 has through holes, through which emissions generated by the battery cell pass into the collection cavity 31.

[0033] In this embodiment, the side beam 1 has an opening 14 communicating with the cavity 13 on the side facing the guard plate 3. The opening 14 is located between the first plate portion 11 and the second plate portion 12. The sealing member 4 is located between the guard plate 3 and the second plate portion 12. The sealing member 4 has a relief groove 41, and the relief groove 41 is correspondingly arranged with the opening 14 so that the cavity 13 communicates with the collection cavity 31. The second plate portion 12 has a blocking portion 121 at one end along the first direction Z, and along the second direction X, the orthographic projection of the blocking portion 121 on the reference plane at least partially overlaps with the orthographic projection of the relief groove 41 on the reference plane; wherein, the reference plane (not shown) is a plane perpendicular to the second direction X. Since the relief groove 41 narrows the width of the sealing member 4 along the second direction X, the seal in this section may fail due to the reduced thickness of the sealing member 4. The blocking portion 121 provides protection for this section to ensure that the sealing member 4 has a stable sealing effect.

[0034] Specifically, when the vehicle carrying the battery pack is running on a wet road surface, water outside the side beam 1 will splash due to the vehicle's driving. In cases where the water is deep, the rapid water flow will directly impact the seal 4, causing water to seep into the battery pack. The area outside the relief groove 41 of the seal 4 has sufficient thickness to effectively seal it. The area of ​​the relief groove 41 uses the shielding part 121 as a water-blocking structure, which can effectively block the water flow impacting the side beam 1, reduce the rapid water flow directly acting on this area, effectively alleviate the severe working conditions borne by the seal 4, extend the continuous effect of the seal 4, and enhance its service life and safety.

[0035] During thermal runaway, the emissions generated by the battery cells enter the collection chamber 31, pass through the clearance groove 41 and the opening 14 in sequence, and then enter the cavity 13, and are discharged into the external space. The seal 4 keeps the protective plate 3 and the second plate 12 sealed, preventing external moisture from entering the interior and preventing emissions from leaking from the connection between the protective plate 3 and the second plate 12.

[0036] Based on the above structure, the collection cavity 31 is connected to the cavity 13 through the avoidance groove 41 and the opening 14 to form an exhaust channel. By directly opening the avoidance groove 41 on the seal 4 to avoid the opening 14, it is equivalent to the opening 14 and the seal 4 overlapping. Compared with the method of setting the seal 4 and the opening 14 separately, the end face of the side beam 1 along the first direction Z can be set narrower, avoiding the sacrifice of too much area due to the simultaneous setting of the opening 14 and the seal 4, and further improving the space utilization of the battery pack. Moreover, the shielding part 121 can cover the area of ​​the seal 4 whose width is reduced due to the opening of the avoidance groove 41, which can minimize the impact of the external environment on this area and prevent the sealing effect from weakening and the lifespan from decreasing. It avoids the problem of sealing failure due to the reduction in width in this area, thereby ensuring the overall sealing effect of the battery pack when the size of the seal is reduced.

[0037] like Figure 4 and Figure 5 As shown, in some embodiments, the shielding portion 121 is connected to the seal 4, and along the second direction X, the orthographic projection of the shielding portion 121 on the reference plane completely covers the orthographic projection of the relief groove 41 on the reference plane. Thus, the portion of the seal 4 with the relief groove 41 can be completely shielded and protected by the shielding portion 121, further improving the sealing effect of the seal 4. Furthermore, the absence of gaps between the shielding portion 121 and the seal 4 also enhances the sealing effect of the seal 4.

[0038] like Figure 3 As shown, in some embodiments, a fastener 5 is also included, which is sequentially inserted through the protective plate 3, the seal 4, and the second plate portion 12; and the fastener 5 is spaced apart from the shielding portion 121 and the clearance groove 41. Thus, the fastener 5 fixes the protective plate 3 to the second plate portion 12, allowing the seal 4 to be clamped between the protective plate 3 and the second plate portion 12, improving the stability of the connection structure and enhancing the sealing performance of the seal 4. The fastener 5 avoids the clearance groove 41, ensuring that the ventilation function of the clearance groove 41 is not affected, and the spaced arrangement of the fastener 5 and the shielding portion 121 prevents interference between the fastener 5 and the shielding portion 121, thus avoiding assembly issues.

[0039] In some embodiments, there are multiple fasteners 5 arranged along the periphery of the protective plate 3, and the opening 14 is located between two adjacent fasteners 5 along the arrangement direction of the fasteners 5. This allows the fasteners 5 to be properly installed, and the fasteners 5 ensure that both sides of the opening 14 and both sides of the clearance groove 41 are sealed by the seals 4, preventing leakage from occurring on both sides of the opening 14 and the clearance groove 41. It should be noted that the aforementioned leakage includes the leakage of battery cell emissions from the collection chamber 31 through the sealing area of ​​the seals 4 into the external space, and also includes water impacted by external forces entering the battery pack through the sealing area of ​​the seals 4.

[0040] In some embodiments, there are multiple openings 14, and multiple clearance grooves 41 are also provided, each corresponding to one of the openings 14; along the arrangement direction of the fasteners 5, the openings 14 and the fasteners 5 are alternately arranged. In this way, by providing multiple openings 14, the exhaust efficiency of the side beam 1 can be improved, and the alternation of openings 14 and fasteners 5 can meet the sealing requirements of the outer periphery of the openings 14 and the outer periphery of the clearance grooves 41.

[0041] like Figure 4 and Figure 5 As shown, in some embodiments, along the first direction Z, the height of the shielding portion 121 is less than or equal to the thickness of the seal 4. Thus, after assembly, the thickness of the seal 4, compressed between the guard plate 3 and the second plate portion 12, is still greater than the height of the shielding portion 121, ensuring that the seal 4 tightly abuts against both. This is beneficial for improving the sealing effect of the seal 4, as the latter case, where the height of the shielding portion 121 is greater than the thickness of the seal 4, which may result in the seal 4 not being fully compressed.

[0042] like Figure 3 and 4 As shown, in some embodiments, the first plate portion 11, the second plate portion 12, and the shielding portion 121 are integrally formed. Specifically, the first plate portion 11, the second plate portion 12, and the shielding portion 121 are integrally formed by metal die casting or extrusion processes, thereby achieving high overall structural strength.

[0043] like Figure 4 and Figure 5 As shown, in some embodiments, the orthographic projection of the shielding portion 121 along the first direction Z is at least partially located on the guard plate 3. It should be noted that if the size of the guard plate 3 is smaller than the size of the side beam 1, i.e., the shielding portion 121 is on the outside of the guard plate 3, then there are higher requirements for the size of the guard plate 3. If the size of the guard plate 3 is too large, it will not fit into the side beam 1; if the size of the guard plate 3 is too small, it will be difficult to close the opening 14 of the side beam 1. The fact that the orthographic projection of the shielding portion 121 along the first direction Z is at least partially located on the guard plate 3 means that the area formed by the guard plate 3 relative to the side beam is larger, which is beneficial for the tolerance control and assembly of the guard plate 3.

[0044] Of course, in other embodiments, the orthographic projection of the shielding part 121 along the first direction Z has no overlapping area with the protective plate 3, that is, the shielding part 121 is disposed around the outer periphery of the protective plate 3, and the shielding part 121 is disposed at least around the portion of the protective plate 3.

[0045] like Figure 3 and 4 As shown, in some embodiments, the battery pack also includes an explosion-proof valve 6. The second plate portion 12 has a pressure relief hole 122 extending along a second direction X, which communicates with the cavity 13 and is used to install the explosion-proof valve 6. In this way, emissions generated by individual batteries are discharged from the cavity 13 to the external space along the explosion-proof valve 6.

[0046] Other embodiments of the present invention include electrical devices, including battery packs of some embodiments.

[0047] Based on the above structure, the collection chamber 31 is connected to the cavity 13 in sequence through the clearance groove 41 and the opening 14 to form an exhaust channel. The end face of the side beam 1 along the first direction Z is relatively narrow. The end face needs to be provided with both the opening 14 and the connection position with the guard plate 3. The clearance groove 41 opened by the sealing member 4 allows the cavity 13 and the collection chamber 31 to communicate. The shielding part 121 can cover the area where the width of the sealing member 4 is reduced due to the clearance groove 41, avoiding the problem of sealing failure due to the reduction in width of this area, thereby ensuring the overall sealing effect of the battery pack under the condition that the size of the sealing member is reduced.

[0048] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A battery pack having a first direction (Z) and a second direction (X) perpendicular to each other, characterized in that, include: The side beam (1) includes a first plate portion (11) and a second plate portion (12) arranged along the second direction (X). Along the first direction (Z), one end of the first plate portion (11) and one end of the second plate portion (12) are connected to each other, and the other ends of the first plate portion (11) and the other ends of the second plate portion (12) are spaced apart to form an opening (14). A cavity (13) communicating with the opening (14) is provided between the first plate portion (11) and the second plate portion (12). A partition (2) extends along the second direction (X) and is connected to one end of the first plate portion (11) near the opening (14); A protective plate (3) extends along the second direction (X) and is disposed on one side of the partition (2) along the first direction (Z). The protective plate (3) is connected to the end of the second plate portion (12) near the opening (14), and a collection cavity (31) is formed between the partition (2) and the protective plate (3). The seal (4) has a relief groove (41); The sealing element (4) is located between the guard plate (3) and the second plate (12), and the clearance groove (41) is correspondingly provided with the opening (14) so ​​that the cavity (13) communicates with the collection cavity (31); The second plate portion (12) has a blocking portion (121) at one end along the first direction (Z), and along the second direction (X), the blocking portion (121) and the clearance groove (41) at least partially overlap in their orthogonal projections onto a reference plane; wherein the reference plane is perpendicular to the second direction (X).

2. The battery pack according to claim 1, characterized in that, The shielding part (121) is connected to the seal (4), and along the second direction (X), the orthographic projection of the shielding part (121) on the reference plane completely covers the orthographic projection of the relief groove (41) on the reference plane.

3. The battery pack according to claim 1, characterized in that, It also includes fasteners (5), which are sequentially inserted through the guard plate (3), the seal (4) and the second plate (12); and the fasteners (5) are spaced apart from the clearance groove (41) and the shield (121).

4. The battery pack according to claim 3, characterized in that, The fasteners (5) are numerous and arranged along the periphery of the guard plate (3). Along the arrangement direction of the fasteners (5), the opening (14) is located between two adjacent fasteners (5).

5. The battery pack according to claim 4, characterized in that, The number of openings (14) is multiple; along the arrangement direction of the fasteners (5), the openings (14) and the fasteners (5) are alternately arranged.

6. The battery pack according to claim 1, characterized in that, Along the first direction (Z), the height of the shield (121) is less than or equal to the thickness of the seal (4).

7. The battery pack according to claim 1 or 6, characterized in that, The first plate portion (11), the second plate portion (12), and the shielding portion (121) are integrally formed.

8. The battery pack according to claim 7, characterized in that, The orthographic projection of the shielding portion (121) along the first direction (Z) is at least partially located on the protective plate (3).

9. The battery pack according to claim 8, characterized in that, It also includes an explosion-proof valve (6); the second plate (12) has a pressure relief hole (122) extending along the second direction (X), the pressure relief hole (122) is connected to the cavity (13), and the explosion-proof valve (6) is installed in the pressure relief hole (122).

10. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1-9.

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