Battery pack box and battery pack

Abstract

The utility model relates to battery technology field discloses battery package box and battery package, include: frame, the containment space is enclosed and is formed, including along the first direction extension setting's first side beam, inner beam, set up in the containment space, and inner beam along the second direction extension setting and have in the first end portion of second direction, connecting piece, connect first side beam and first end portion, along third direction, the top end of connecting piece exceeds the top surface of inner beam, reinforcing member, set up in the top surface of inner beam, and with inner beam and connecting piece connection. The utility model connects the first end portion of inner beam with first side beam with connecting piece, and it is convenient to realize the connecting fixed between inner beam and first side beam, and, set up reinforcing member in the top surface of inner beam, make reinforcing member connect with inner beam and connecting piece all simultaneously, can improve the connecting strength between first side beam and inner beam, avoid the connection failure caused after being subjected to the vibration, guarantee the overall structural strength of battery package box, prolong the service life of battery package box.

Description

Technical Field

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

[0002] With the development of electric vehicles, the power battery system, as one of the core components of electric vehicles, faces increasingly higher challenges in terms of safety and reliability. The battery pack housing typically consists of interconnected frame frames and internal beams. Because the battery pack is frequently subjected to vibration during use, the frame frames and internal beams are prone to connection failure under long-term vibration, leading to a weakening of the overall structural strength of the battery pack housing and making it susceptible to damage under vibration. Utility Model Content

[0003] In view of this, the present invention provides a battery pack housing and a battery pack to solve the problem that the frame and inner beam of the battery pack housing are prone to connection failure under long-term vibration in the prior art.

[0004] In a first aspect, the present invention provides a battery pack housing, comprising: a frame that encloses a circumferential space to form an accommodating space, the frame including a first side beam extending along a first direction; an inner beam disposed within the accommodating space, the inner beam extending along a second direction and having a first end in the second direction; a connector connecting the first side beam and the first end, the top end of the connector extending beyond the top surface of the inner beam along a third direction; wherein the first direction, the second direction, and the third direction are mutually perpendicular; and a reinforcing member disposed on the top surface of the inner beam and connected to the inner beam and the connector.

[0005] Beneficial effects: The first end of the inner beam is connected to the first side beam by a connector, which facilitates the connection and fixation between the inner beam and the first side beam. Furthermore, a reinforcing member is provided on the top surface of the inner beam, which is connected to both the inner beam and the connector. Therefore, the connection strength between the first side beam and the inner beam can be improved, avoiding connection failure caused by vibration. This ensures the overall structural strength of the battery pack housing and extends the service life of the battery pack housing.

[0006] Secondly, this utility model also provides a battery pack, including: the aforementioned battery pack housing; and a battery module disposed within the battery pack housing.

[0007] Beneficial effects: By improving the overall structural strength of the battery pack housing, damage to the battery pack housing when subjected to vibration is prevented, thereby ensuring the limiting and protection function of the battery pack housing for the battery modules and guaranteeing the safety performance of the battery pack. Attached Figure Description

[0008] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the overall structure of a battery pack housing according to an embodiment of the present utility model;

[0010] Figure 2 for Figure 1 A magnified view of part A in the diagram;

[0011] Figure 3 for Figure 1 The top view of the battery pack housing shown;

[0012] Figure 4 for Figure 3 A magnified view of part B in the diagram;

[0013] Figure 5 for Figure 3 A cross-sectional view along the CC direction;

[0014] Figure 6 for Figure 5 A magnified view of part of D;

[0015] Figure 7 This is a schematic diagram of the structure of an inner beam according to an embodiment of the present utility model;

[0016] Figure 8 This is a structural schematic diagram of a connector according to an embodiment of the present utility model.

[0017] Explanation of reference numerals in the attached figures:

[0018] 1. Frame; 101. First side beam; 102. Second side beam; 2. Inner beam; 201. First end; 202. First hole; 203. Enclosing plate; 2031. Cavity; 20311. Dividing cavity; 2032. First plate; 2033. Second plate; 2034. Third plate; 2035. Fourth plate; 204. Partition plate; 2041. Third hole; 3. Connector; 301. Sheet; 302. Protrusion; 3021. Second hole; 4. Reinforcing member; 401. Notch; 5. First weld; 6. Second weld; 7. Third weld; 8. First fastener; 9. Base plate; 10. Fourth weld; 11. Fifth weld; 12. Second fastener; 13. Sixth weld. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] The following is combined Figures 1 to 8 The following describes embodiments of the present invention.

[0021] According to an embodiment of the present invention, a battery pack housing is provided, comprising: a frame 1, which encloses a circumferential space to form an accommodating space, the frame 1 including a first side beam 101 extending along a first direction; an inner beam 2 disposed within the accommodating space, the inner beam 2 extending along a second direction and having a first end 201 in the second direction; a connector 3 connecting the first side beam 101 and the first end 201, the top end of the connector 3 extending beyond the top surface of the inner beam 2 along a third direction; wherein the first direction, the second direction, and the third direction are mutually perpendicular; and a reinforcing member 4 disposed on the top surface of the inner beam 2 and connected to the inner beam 2 and the connector 3.

[0022] In the battery pack housing of this embodiment, the first end 201 of the inner beam 2 is connected to the first side beam 101 by the connector 3, which facilitates the connection and fixation between the inner beam 2 and the first side beam 101. Furthermore, a reinforcing member 4 is provided on the top surface of the inner beam 2, so that the reinforcing member 4 is connected to both the inner beam 2 and the connector 3. Therefore, the connection strength between the first side beam 101 and the inner beam 2 can be improved, avoiding connection failure caused by vibration, thereby ensuring the overall structural strength of the battery pack housing and extending the service life of the battery pack housing.

[0023] It should be noted that in this embodiment, the reinforcing member, the inner beam, and the connecting member are all welded together. Of course, in other alternative embodiments, other methods can be used to connect the reinforcing member to the inner beam and the connecting member.

[0024] Specifically, in this embodiment, such as Figure 1 and Figure 3 As shown, the frame 1 also includes a second side beam 102 extending along the second direction. Furthermore, there are two first side beams 101 spaced apart from each other in the second direction, and the second side beam 102 is connected between the two first side beams 101.

[0025] It is worth noting that in this embodiment, please refer to... Figure 3The first direction is the length direction of the battery pack housing, and the second direction is the width direction of the battery pack housing. That is, the length of the first side beam 101 is greater than the length of the second side beam 102. Therefore, when the battery pack housing is subjected to vibration, the middle region of the first side beam 101 along the length direction (first direction) will vibrate the most violently. In this embodiment, by setting an inner beam 2 to support the two first side beams 101, preferably, the inner beam 2 can be set in the middle region along the length direction of the first side beam 101, thereby improving the structural strength of the first side beam 101 and reducing the impact of vibration on the first side beam 101; and by setting a reinforcing member 4, the connection strength between the inner beam 2 and the connecting member 3 is improved, which can also improve the connection reliability between the inner beam 2 and the first side beam 101, and avoid the connection failure of the inner beam 2 under the action of large vibration in the middle region of the first side beam 101.

[0026] It should be noted that you should refer to [link / reference]. Figure 1 Along the first direction, there are several inner beams 2 spaced apart. That is, except for the middle area of ​​the first side beam 101 along the first direction, inner beams 2 can also be set in other areas.

[0027] Of course, in other alternative embodiments, the first direction can also be the width direction of the battery pack housing, and correspondingly, the second direction is the width direction of the battery pack housing. In this case, the length of the first side beam 101 is less than the length of the second side beam 102. Alternatively, the length of the first side beam 101 can also be equal to the length of the second side beam 102, so that the battery pack housing has a square structure.

[0028] It is understood that the inner beam 2 has two first ends 201 arranged opposite to each other in the second direction, and the two first ends 201 are respectively arranged corresponding to the two first side beams 101.

[0029] It should be noted that, as Figure 1 As shown, the battery pack housing also includes a base plate 9, which is connected to the frame 1. When the battery is placed in the housing space, the base plate 9 supports the battery. Along a third direction, one side of the inner beam 2 faces the base plate 9, which is the bottom surface of the inner beam 2, and the other side of the inner beam 2 faces away from the base plate 9, which is the top surface of the inner beam 2.

[0030] It is worth noting that, for commercial vehicle battery packs, the battery pack housing typically includes an upper housing and a lower housing stacked along a third direction. Both the upper and lower housings include structures such as a frame 1 and an inner beam 2. The connection method of the frame 1 and the inner beam 2 in this embodiment can be applied to both the upper and lower housings.

[0031] In one embodiment, such as Figure 2 and Figure 6As shown, the first end 201 is welded to the connector 3 at the top surface of the inner beam 2 to form a first weld 5. The reinforcing member 4 has a notch 401, which corresponds to the first weld 5. By setting the notch 401, interference between the reinforcing member 4 and the first weld 5 is avoided during installation, thereby ensuring the fit between the reinforcing member 4 and the top surface of the inner beam 2 and the connector 3, and thus ensuring the welding effect between the reinforcing member 4 and the inner beam 2 and the connector 3. Furthermore, it also prevents the reinforcing member 4 from overlapping with the first weld 5 when welding to the inner beam 2 and the connector 3, thereby avoiding any impact on the welding effect of the first weld 5 and ensuring the welding strength of the first weld 5.

[0032] It is worth noting that in this embodiment, by welding a reinforcing member 4 between the top surface of the inner beam 2 and the connecting member 3, the stress at the first weld 5 can be dispersed, thereby avoiding the problem that the first weld 5 is prone to cracking under long-term vibration.

[0033] In one embodiment, such as Figure 2 As shown, the reinforcing member 4 is welded to the inner beam 2 to form a second weld 6 extending in a second direction, and the reinforcing member 4 is welded to the connecting member 3 to form a third weld 7 extending in a third direction. The length of the second weld 6 is greater than the length of the third weld 7. This arrangement can further ensure the connection strength between the reinforcing member 4 and the inner beam 2 and the connecting member 3, thereby further improving the structural strength of the battery pack housing.

[0034] It is worth noting that the dimension of the first side beam 101 along the third direction is much smaller than the dimension of the inner beam 2 along the second direction. Therefore, the space left on the connector 3 for welding with the reinforcing member 4 is small, while the dimension available for welding on the inner beam 2 is larger. Thus, the welding dimension between the reinforcing member 4 and the inner beam 2 can be increased, thereby ensuring the welding reliability of the reinforcing member 4.

[0035] It should be noted that, as can be seen from the above, by setting a notch 401 in the reinforcing member 4, the overlap of the first weld 5, the second weld 6, and the third weld 7 can be avoided, thereby avoiding the impact on the welding effect of the first weld 5 when the second weld 6 and the third weld 7 are formed.

[0036] It is worth noting that the reinforcing member 4 has a second weld 6 at the connection points with the corresponding inner beam 2 on both sides of the first direction, and a third weld 7 at the connection points with the corresponding connecting member 3 on both sides of the first direction. Furthermore, as... Figure 2 As shown, a fourth weld 10 is provided at the connection position between the reinforcing member 4 and the connecting member 3 on one side in the second direction, and a fifth weld 11 is provided at the connection position between the reinforcing member 4 and the top surface of the inner beam 2 on the other side in the second direction. It can be understood that both the fourth weld 10 and the fifth weld 11 extend along the first direction.

[0037] In one embodiment, such as Figure 4 As shown, along the first direction, the width of the inner beam 2 is 'a', and the width of the reinforcing member 4 is 'b', satisfying 0.75 ≤ b / a ≤ 1. This arrangement facilitates welding of the reinforcing member 4 to the inner beam 2 while ensuring the connection strength between the reinforcing member 4 and the inner beam 2.

[0038] It is worth noting that if the value of b / a is too small, the connection effect of the reinforcing member 4 between the inner beam 2 and the connecting member 3 will not be obvious, and the connection strength between the inner beam 2 and the connecting member 3 will still be low, and there is still a risk of connection failure when subjected to vibration. If the value of b / a is too large, the reinforcing member 4 may easily extend beyond the inner beam 2 in the first direction, making it difficult to weld the reinforcing member 4 and the inner beam 2.

[0039] Optionally, b / a can be any value from 0.75, 0.78, 0.8, 0.82, 0.85, 0.88, 0.9, 0.92, 0.95, 0.98, 1, or a value between any two values.

[0040] Specifically, in one embodiment, the width 'a' of the inner beam 2 satisfies 20mm ≤ a ≤ 30mm. This configuration ensures the structural strength of the battery pack housing while improving the space utilization of the battery pack.

[0041] It is worth noting that if the value of 'a' is too small, the structural strength of the inner beam 2 will be weak, and the supporting effect of the inner beam 2 between the two first side beams 101 will be insufficient, resulting in a weak overall structural strength of the battery pack housing. If the value of 'a' is too large, the inner beam 2 will occupy too much space, resulting in a reduction in the remaining space available to accommodate the battery, affecting the space utilization rate and energy density of the battery pack.

[0042] Optionally, the value of 'a' can be any value among 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, and 30mm, or a value between any two of these values.

[0043] Specifically, in one embodiment, the width b of the reinforcing member 4 satisfies 15mm ≤ b ≤ 30mm. This arrangement facilitates welding of the reinforcing member 4 to the inner beam 2 while ensuring the connection strength between the reinforcing member 4 and the inner beam 2.

[0044] It is worth noting that if the value of b is too small, the connection effect of the reinforcing member 4 between the inner beam 2 and the connecting member 3 will not be obvious, and the connection strength between the inner beam 2 and the connecting member 3 will still be low, and there is still a risk of connection failure when subjected to vibration. If the value of b is too large, the reinforcing member 4 may easily extend beyond the inner beam 2 in the first direction, making it difficult to weld the reinforcing member 4 and the inner beam 2.

[0045] Optionally, the value of b can be any value among 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, and 30mm, or a value between any two of these values.

[0046] In one embodiment, such as Figure 6 As shown, the connector 3 includes a sheet 301 and a protrusion 302. One side of the sheet 301 is fitted and connected to the inner wall of the first side beam 101, and the protrusion 302 is connected to the other side of the sheet 301. The protrusion 302 is inserted into the inner beam 2 from the first end 201. By providing the protrusion 302 and inserting it into the inner beam 2, the connection strength between the connector 3 and the inner beam 2 can be improved.

[0047] Specifically, in one embodiment, such as Figure 2 As shown, the battery pack housing also includes a second fastener 12, which penetrates the sheet 301 and is fastened to the first side beam 101, thereby connecting the connector 3 and the first side beam 101. Furthermore, several second fasteners 12 are spaced apart to improve the connection reliability between the connector 3 and the first side beam 101.

[0048] It should be noted that the inner wall of the first side beam 101 is the side wall of the first side beam 101 facing the accommodating space.

[0049] Furthermore, in one embodiment, such as Figure 2 As shown, the first end 201 is welded to the sheet 301 on both opposite sides of the inner beam 2 along the first direction, forming a sixth weld 13. Furthermore, the sixth weld 13 extends along a third direction.

[0050] In one embodiment, such as Figures 6 to 8 As shown, the top surface of the inner beam 2 has a first hole 202, and the protrusion 302 has a second hole 3021. The first hole 202 and the second hole 3021 are arranged opposite to each other. The battery pack housing also includes a first fastener 8, which passes through the first hole 202 and the second hole 3021. The first fastener 8 is used to connect the inner beam 2 and the protrusion 302, further improving the connection reliability between the inner beam 2 and the connector 3.

[0051] It is worth noting that the first fastener 8 can be a bolt, which extends along a third direction, passes through the first hole 202, enters the second hole 3021, and is fastened in the second hole 3021.

[0052] Furthermore, in one embodiment, such as Figure 7As shown, the first hole 202 is an elongated hole, and its length is set along the second direction. This design facilitates the installation of the first fastener 8 with the first hole 202 and the second hole 3021.

[0053] Furthermore, in one embodiment, such as Figure 2 and Figure 6 As shown, the reinforcing member 4 covers the first hole 202. This arrangement protects the location of the first fastener 8, preventing the environment inside the battery pack from corroding the connection between the first fastener 8 and the protrusion 302, thus further ensuring the reliability of the connection between the first fastener 8 and the protrusion 302.

[0054] In one embodiment, such as Figures 6 to 8 As shown, the inner beam 2 includes a surrounding plate 203 and a partition plate 204. The surrounding plate 203 encloses and forms a cavity 2031. The partition plate 204 is disposed in the cavity 2031 and connected to the surrounding plate 203, dividing the cavity 2031 into several sub-cavities 20311 along a third direction. The partition plate 204 has a third hole 2041, which is opposite to the second hole 3021. Several protrusions 302 are spaced apart along a third direction, and the protrusions 302 are respectively inserted into the several sub-cavities 20311. The first fastener 8 passes through both the second hole 3021 and the third hole 2041 of the protrusions 302. This arrangement increases the number of connection points between the inner beam 2 and the protrusions 302, thereby further improving the connection reliability between the inner beam 2 and the connector 3.

[0055] Specifically, in this embodiment, such as Figure 7 As shown, the enclosing plate 203 includes a first plate 2032 and a second plate 2033 spaced apart along a third direction, and a third plate 2034 and a fourth plate 2035 spaced apart along a first direction. The first plate 2032 is connected between the third plate 2034 and the fourth plate 2035, and the second plate 2033 is also connected between the third plate 2034 and the fourth plate 2035. The first plate 2032, the second plate 2033, the third plate 2034, and the fourth plate 2035 enclose and form a cavity 2031. The first plate 2032 forms the top surface of the inner beam 2, and a first hole 202 is formed in the first plate 2032. The partition plate 204 is connected to the third plate 2034 and the fourth plate 2035 on opposite sides along the first direction, and the partition plate 204 is parallel to the first plate 2032 and the second plate 2033. The partition plate 204 can be provided in one or more ways, thereby dividing the cavity 2031 into at least two sub-cavities 20311.

[0056] It is worth noting that the first plate 2032 is welded to the sheet 301 to form the first weld 5, and the third plate 2034 and the fourth plate 2035 are both welded to the sheet 301 to form two sixth welds 13.

[0057] Furthermore, in one embodiment, such as Figure 6 As shown, each cavity 20311 has a protrusion 302 inserted inside, so that each partition plate 204 is sandwiched between two adjacent protrusions 302.

[0058] According to an embodiment of the present invention, another aspect provides a battery pack, comprising: the aforementioned battery pack housing; and a battery module disposed within the battery pack housing.

[0059] The battery pack using this embodiment improves the overall structural strength of the battery pack housing, preventing damage to the battery pack housing when subjected to vibration. This ensures the limiting and protective function of the battery pack housing for the battery modules, thereby guaranteeing the safety performance of the battery pack.

[0060] Furthermore, the battery pack housing includes an upper housing and a lower housing stacked along a third direction. Correspondingly, the battery module includes an upper module and a lower module, with the upper module disposed in the upper housing and the lower module disposed in the lower housing.

[0061] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery pack case characterized by, include: A frame (1) is formed by enclosing a accommodating space along the circumferential direction. The frame (1) includes a first side beam (101) extending along a first direction. An inner beam (2) is disposed within the accommodating space, the inner beam (2) extending along a second direction and having a first end (201) in the second direction; A connector (3) connects the first side beam (101) and the first end (201). Along a third direction, the top end of the connector (3) extends beyond the top surface of the inner beam (2). The first direction, the second direction, and the third direction are perpendicular to each other. A reinforcing member (4) is disposed on the top surface of the inner beam (2) and connected to the inner beam (2) and the connecting member (3).

2. The battery pack enclosure of claim 1, wherein, The first end (201) is welded to the connector (3) at the top surface of the inner beam (2) to form a first weld (5). The reinforcing member (4) is provided with a notch (401), which is provided corresponding to the first weld (5).

3. The battery pack housing according to claim 1 or 2, characterized in that, The reinforcing member (4) is welded to the inner beam (2) to form a second weld (6) extending in a second direction, and the reinforcing member (4) is welded to the connecting member (3) to form a third weld (7) extending in a third direction. The length of the second weld (6) is greater than the length of the third weld (7).

4. The battery pack enclosure of claim 1 or 2, wherein, Along the first direction, the width of the inner beam (2) is a, and the width of the reinforcing member (4) is b, satisfying 0.75≤b / a≤1.

5. The battery pack enclosure of claim 4, wherein, The width a of the inner beam (2) satisfies 20mm ≤ a ≤ 30mm; and / or, The width b of the reinforcing member (4) satisfies 15mm≤b≤30mm.

6. The battery pack housing according to claim 1 or 2, characterized in that, The connector (3) includes a sheet (301) and a protrusion (302). One side of the sheet (301) is fitted and connected to the inner wall of the first side beam (101). The protrusion (302) is connected to the other side of the sheet (301). The protrusion (302) is inserted into the inner beam (2) from the first end (201).

7. The battery pack enclosure of claim 6, wherein, The top surface of the inner beam (2) is provided with a first hole (202), and the protrusion (302) is provided with a second hole (3021). The first hole (202) and the second hole (3021) are arranged opposite to each other. The battery pack housing also includes a first fastener (8), which passes through the first hole (202) and the second hole (3021).

8. The battery pack enclosure of claim 7, wherein, The reinforcing member (4) is provided to cover the first hole (202).

9. The battery pack enclosure of claim 7, wherein, The inner beam (2) includes a surrounding plate (203) and a partition plate (204). The surrounding plate (203) encloses to form a cavity (2031). The partition plate (204) is disposed in the cavity (2031) and connected to the surrounding plate (203) to divide the cavity (2031) into several sub-cavities (20311) along a third direction. The partition plate (204) has a third hole (2041) which is disposed opposite to the second hole (3021). Several protrusions (302) are spaced apart along a third direction. Several protrusions (302) are inserted into several sub-cavities (20311). The first fastener (8) passes through the second hole (3021) and the third hole (2041) of several protrusions (302).

10. A battery pack, characterized by, include: Battery pack housing as claimed in any one of claims 1 to 9; The battery module is housed within the battery pack housing.

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