Battery box body and battery pack

Abstract

The utility model provides a battery box body and a battery pack, at least two side edges of the battery box body are supported on a battery cluster support, the battery box body comprises a frame assembly, a cold plate and a reinforcing assembly, the frame assembly and the cold plate define an accommodating space for accommodating a battery cell, and the cold plate is clamped between the frame assembly and the reinforcing assembly; the reinforcing assembly comprises a first reinforcing rib, and the first reinforcing rib is configured to extend in the length and / or width direction of the cold plate; the first reinforcing rib is at least provided with a concave part and a connecting part, the top face of the connecting part is connected with the bottom face of the cold plate, the concave part is concave in the direction away from the cold plate, and the bottom of the concave part is used for abutting against the battery cluster support. Therefore, according to the battery box body, the bearing capacity of the cold plate can be effectively improved, a battery cell or a battery pack with larger capacity can be stably arranged on the battery box body, the energy density of a battery pack is improved, the service life of the battery pack is prolonged, the liquid leakage phenomenon caused by bending of the cold plate can be avoided, and the use safety of the battery pack is improved.

Description

Technical Field

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

[0002] Currently, the battery housing of energy storage battery packs mainly consists of battery cells, cold plates, and frame assemblies. The cold plates and frame assemblies form a cavity for housing the batteries, with the battery cells placed on top of the cold plates. However, as the requirements for battery energy density increase, the cold plates are prone to deformation when bearing increasingly larger battery cells. This not only significantly affects the battery pack's range and lifespan but may also cause leakage, affecting the safety of the battery pack. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a battery box that can not only effectively improve the load-bearing capacity of the cold plate, thereby improving the energy density and service life of the battery pack, but also improve the safety of the battery pack.

[0004] Another objective of this invention is to provide a battery pack.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A battery housing has at least two sides supported on a battery cluster support. The battery housing includes a frame assembly, a cold plate, and a reinforcing assembly. The frame assembly and the cold plate form a receiving space for accommodating battery cells. The cold plate is sandwiched between the frame assembly and the reinforcing assembly.

[0007] The reinforcing component includes a first reinforcing rib, which is configured to extend along the length and / or width direction of the cold plate.

[0008] The first reinforcing rib is provided with at least a recessed portion and a connecting portion. The top surface of the connecting portion is connected to the bottom surface of the cold plate. The recessed portion is recessed in a direction away from the cold plate, and the bottom of the recessed portion is used to abut against the battery cluster bracket.

[0009] As can be seen from the above technical solutions, the battery housing disclosed in this utility model can support the cold plate by setting the first reinforcing rib of the reinforcing component. Before setting the reinforcing component, the edge of the cold plate would directly abut against the battery cluster support. Due to the small contact area between the two and the large overall weight of the battery pack, deformation would occur at the contact point between the cold plate and the battery cluster support, causing the cold plate to bend downwards, which could lead to breakage, leakage, etc. By setting the recessed part and the connecting part of the first reinforcing rib, the stress area of ​​the cold plate can be increased, the local pressure can be reduced, and the stress on the cold plate can be kept within a suitable range. In addition, the strength of the first reinforcing rib can be effectively improved, especially the strength of the contact point between the first reinforcing rib and the battery cluster support, making the placement of the battery pack more stable.

[0010] Therefore, the aforementioned battery housing can not only effectively improve the load-bearing capacity of the cold plate, allowing for the stable arrangement of larger capacity cells or battery packs on the battery housing, thus increasing the energy density and service life of the battery pack, but also prevent leakage caused by bending of the cold plate, thereby improving the safety of the battery pack. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0012] Figure 1 This is a three-dimensional structural diagram of the battery box disclosed in the embodiment of this utility model;

[0013] Figure 2 This is a front view of the battery box disclosed in the embodiment of this utility model;

[0014] Figure 3 This is a schematic diagram of the installation structure of the battery box and battery cluster support disclosed in the embodiments of this utility model;

[0015] Figure 4 This is a schematic diagram of the arrangement structure of the reinforcing components on the cold plate as disclosed in the embodiments of this utility model;

[0016] Figure 5 This is a schematic diagram of the cooperative structure of the first reinforcing rib, the cold plate, and the battery cluster support disclosed in the embodiment of this utility model;

[0017] Figure 6 This is a cross-sectional schematic diagram of the first reinforcing rib disclosed in the embodiment of this utility model;

[0018] Figure 7This is a schematic diagram of the installation structure of the battery cluster support and battery pack disclosed in the embodiments of this utility model;

[0019] Figure 8 This is an exploded structural diagram of the battery pack disclosed in the embodiments of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 100-Border component,

[0022] 200-Cold Plate,

[0023] 300 - Reinforcing component, 301 - First reinforcing rib, 3011 - Recessed portion, 3012 - Connecting portion, 302 - Second reinforcing rib, 303 - Third reinforcing rib.

[0024] 400-Fasteners

[0025] 500-battery cluster bracket,

[0026] 600 - Battery pack, 601 - Battery cell, 602 - Top cover. Detailed Implementation

[0027] In view of this, the core of this utility model is to provide a battery housing that can not only effectively improve the load-bearing capacity of the cold plate, improve the battery pack's range and service life, but also improve the battery pack's safety in use.

[0028] Another key aspect of this invention is that it provides a battery pack.

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Please refer to... Figures 1 to 8 .

[0030] Please refer to Figure 1 and Figure 4 The battery housing disclosed in this embodiment of the present invention has at least two sides supported on the battery cluster support 500. The battery housing includes a frame assembly 100, a cold plate 200 and a reinforcing assembly 300. The frame assembly 100 and the cold plate 200 form a receiving space for accommodating the battery cell 601. The cold plate 200 is sandwiched between the frame assembly 100 and the reinforcing assembly 300.

[0031] The reinforcing component 300 includes a first reinforcing rib 301, which is configured to extend along the length and / or width of the cold plate 200. The first reinforcing rib 301 is provided with at least a recessed portion 3011 and a connecting portion 3012. The top surface of the connecting portion 3012 is connected to the bottom surface of the cold plate 200. The recessed portion 3011 is recessed in a direction away from the cold plate 200, and the bottom of the recessed portion 3011 is used to abut against the battery cluster support 500.

[0032] The battery housing disclosed in this embodiment of the present invention supports the cold plate 200 by providing the first reinforcing rib 301 of the reinforcing component 300. Before the reinforcing component 300 is provided, the edge of the cold plate 200 directly abuts against the battery cluster support 500. Due to the small contact area and the large overall weight of the battery pack 600, deformation can occur at the contact point between the cold plate 200 and the battery cluster support 500, causing the cold plate 200 to bend downwards, potentially leading to breakage or leakage. The recessed portion 3011 and connecting portion 3012 of the first reinforcing rib 301 increase the stress-bearing area of ​​the cold plate 200, reducing localized pressure and maintaining the stress on the cold plate 200 within a suitable range. Furthermore, it effectively improves the strength of the first reinforcing rib 301, especially the strength at the contact point between the first reinforcing rib 301 and the battery cluster support 500, making the placement of the battery pack 600 more stable.

[0033] Therefore, the aforementioned battery housing can not only effectively improve the load-bearing capacity of the cold plate 200, allowing for the stable arrangement of larger capacity cells 601 or battery packs on the battery housing, thereby increasing the energy density and service life of the battery pack 600, but also prevent leakage of the cold plate 200 due to bending, thus improving the safety of the battery pack 600.

[0034] It should be noted that the first reinforcing rib 301 can be a straight structure, for example, when the first reinforcing rib 301 extends along the length or width direction of the cold plate 200; the first reinforcing rib 301 can also be an L-shaped structure, for example, when the first reinforcing rib 301 extends along the length and width direction of the cold plate 200.

[0035] Generally, when the battery cluster bracket 500 abuts against the cold plate 200 in its length direction, it is preferable to set the first reinforcing rib 301 along the length direction of the cold plate 200; when the battery cluster bracket 500 abuts against the cold plate 200 in its width direction, it is preferable to set the first reinforcing rib 301 along the width direction of the cold plate 200.

[0036] For further embodiments, please refer to the following: Figure 5The depth h of the recess 3011 disclosed in this embodiment of the present invention satisfies 0.5cm≤h≤5cm. For example, h can be 2cm, 3cm or 4cm. This setting can avoid the recess 3011 being too deep and encroaching on the distance in the thickness direction of the battery pack 600, which would reduce the thickness of the battery cell 601 or battery pack that can be installed in the battery pack 600. It can also avoid the recess 3011 being too shallow and affecting the strength of the first reinforcing rib 301.

[0037] For further embodiments, please refer to the following: Figure 6 In this embodiment of the invention, the angle R between the edge of the recessed portion 3011 and the cold plate 200 satisfies 15°≤R≤70°. For example, R can be 30°, 40°, or 55°. This setting avoids the connection between the recessed portion 3011 and the connecting portion 3012 becoming too sharp due to an angle R that is too small, thus protecting the cold plate 200 from damage. It also avoids the first reinforcing rib 301 becoming insufficiently strong due to an angle R that is too large.

[0038] In order to improve the connection strength between the first reinforcing rib 301 and the cold plate 200 and the frame assembly 100, the connection part 3012 disclosed in this embodiment of the present invention is preferably two, and is respectively disposed on both sides of the recessed part 3011.

[0039] In order to further improve the connection strength between the first reinforcing rib 301 and the cold plate 200 and the frame assembly 100, the width n of the connection part 3012 near the edge of the cold plate 200 of the battery box disclosed in this embodiment of the utility model needs to satisfy 1cm≤n≤10cm, for example, n can be 3cm, 6cm or 8cm.

[0040] In order to improve the connection strength with the battery cluster bracket 500, the first reinforcing rib 301 disclosed in this embodiment of the utility model is configured as at least two ribs along the length or width direction of the cold plate 200, and is respectively disposed opposite to each other on the two edge areas of the cold plate 200.

[0041] When the battery cluster bracket 500 abuts against the cold plate 200 in its length direction, the two first reinforcing ribs 301 need to be arranged opposite each other in the length direction of the cold plate 200; when the battery cluster bracket 500 abuts against the cold plate 200 in its width direction, the two first reinforcing ribs 301 need to be arranged opposite each other in the width direction of the cold plate 200.

[0042] For further embodiments, please refer to the following: Figure 4In this embodiment of the invention, the contact length between the first reinforcing rib 301 and the cold plate 200 along the length direction is P, and the total length of the cold plate 200 is Q. The ratio of P / Q satisfies 0.75 ≤ P / Q ≤ 1, and the units of P and Q are the same, preferably cm. For example, P / Q can be 0.8, 0.85, or 0.9. This arrangement avoids the situation where the contact length P between the first reinforcing rib 301 and the cold plate 200 is too small, resulting in an insufficient supporting area for the cold plate and thus failing to effectively support the cold plate 200.

[0043] As a further embodiment, please refer to Figure 5 In the battery housing disclosed in this embodiment of the present invention, when the first reinforcing rib 301 is configured to extend along the length direction of the cold plate 200, the total length of the first reinforcing rib 301 in contact with the cold plate 200 in the width direction is L, and the total width of the cold plate 200 is M. The ratio of L / M satisfies 0.05 ≤ L / M ≤ 0.5, and the units of L and M are the same, preferably cm. For example, the ratio of L / M can be 0.1, 0.2, or 0.3. The longer the length L, the better the support effect on the bottom of the cold plate 200. However, if the length L is too long, it may cause the first reinforcing rib 301 to be too heavy, thereby increasing the overall weight of the battery pack 600, which is detrimental to the transportation and installation of the battery pack 600. Therefore, the above-mentioned L / M ratio range will neither cause the first reinforcing rib 301 to be too heavy nor improve the support effect on the bottom of the cold plate 200.

[0044] As a further embodiment, the reinforcing component 300 disclosed in this utility model embodiment also includes a second reinforcing rib 302, wherein the second reinforcing rib 302 is disposed in the middle region of the cold plate 200 along the length direction of the cold plate 200.

[0045] The L / M ratio further satisfies 0.05 ≤ L / M ≤ 0.3, for example, the L / M ratio is 0.1, 0.15 or 0.25.

[0046] This configuration, combining the first reinforcing rib 301 with the second reinforcing rib 302, not only increases the supporting parts for the cold plate 200, but also increases the supporting area for the cold plate 200, thus resulting in a better supporting effect.

[0047] For further embodiments, please refer to the following: Figure 4 and Figure 5 The first reinforcing rib 301 disclosed in this embodiment of the present invention is configured to extend along the length and width directions of the cold plate 200.

[0048] Wherein, the length of the first reinforcing rib 301 in contact with the cold plate 200 in the width direction is L, and the total width of the cold plate 200 is M, wherein the ratio of L / M satisfies 0.05≤L / M≤0.25, for example, the ratio of L / M is 0.1, 0.16 or 0.2.

[0049] With this configuration, first reinforcing ribs 301 are provided around the edges of the cold plate 200, which can increase the support area for the edges of the cold plate 200 and thus improve the support effect.

[0050] As a further embodiment, the reinforcing component 300 disclosed in this utility model embodiment also includes a second reinforcing rib 302, wherein the second reinforcing rib 302 is disposed in the middle region of the cold plate 200 along the length direction of the cold plate 200.

[0051] Under the above conditions, the L / M ratio satisfies 0.05 ≤ L / M ≤ 0.23, for example, the L / M ratio is 0.1, 0.15 or 0.22.

[0052] With this configuration, the support area at the bottom of the cold plate 200 can be increased by combining the second reinforcing rib 302 with the first reinforcing rib 301, resulting in a better support effect.

[0053] As a further embodiment, the reinforcing component 300 disclosed in this utility model embodiment also includes a third reinforcing rib 303, which is disposed in the middle region of the cold plate 200 along the width direction of the cold plate 200.

[0054] The L / M ratio further satisfies 0.05 ≤ L / M ≤ 0.2. For example, the L / M ratio can be 0.08, 0.12, or 0.18. This configuration provides support for multiple parts of the bottom of the cold plate 200. Under the support of the first reinforcing rib 301, the second reinforcing rib 302, and the third reinforcing rib 303, the cold plate 200 can be supported more effectively.

[0055] The frame assembly 100, cold plate 200 and connecting part 3012 disclosed in this embodiment of the utility model are connected by fastener 400.

[0056] In order to ensure the installation space of the fastener 400, the width of the connecting portion 3012 near the edge of the cold plate 200 disclosed in this embodiment of the present invention is greater than the diameter of the fastener 400.

[0057] Among them, fastener 400 is preferably a rivet screw.

[0058] As a further embodiment, the cold plate 200 disclosed in this utility model embodiment includes a refrigerant flow channel, and the projection of the connecting part 3012 in the vertical direction of the cold plate 200 is misaligned with the refrigerant flow channel. With this arrangement, the position supporting the cold plate 200 does not coincide with the refrigerant flow channel, thereby avoiding damage to the cold plate 200 caused by pressure on the refrigerant flow channel.

[0059] This utility model embodiment does not limit the specific arrangement of the recessed portion 3011. Any structure that meets the usage requirements of this utility model is within the protection scope of this utility model.

[0060] As one embodiment, please refer to Figures 2 to 4 The recessed portion 3011 disclosed in this embodiment of the present invention may be one, and extends from one end of the first reinforcing rib 301 to the other end.

[0061] As another specific embodiment, the recessed portion 3011 disclosed in this utility model embodiment is at least two, and is spaced apart along the length or width direction of the first reinforcing rib 301.

[0062] When the recessed portion 3011 is arranged along the length direction of the first reinforcing rib 301, the cross-section of the first reinforcing rib 301 can be a multi-segment structure; when the recessed portion 3011 is arranged along the width direction of the first reinforcing rib 301, the cross-section of the first reinforcing rib 301 can be a wave-like structure.

[0063] This utility model embodiment also discloses a battery pack 600, please refer to... Figure 7 and Figure 8 The battery pack 600 includes a battery housing, a battery cell 601, and a top cover 602. The top cover 602 is disposed on the battery housing, and the battery cell 601 is installed inside the battery housing. The battery housing is the battery housing disclosed in any of the above embodiments.

[0064] Since the battery pack 600 disclosed in this embodiment of the present invention adopts the battery housing disclosed in any of the above embodiments, the battery pack 600 disclosed in this embodiment of the present invention also has the technical advantages of the battery housing disclosed in the above embodiments, and this embodiment of the present invention will not elaborate on them one by one.

[0065] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0066] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0067] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery housing, wherein at least two sides are supported on a battery cluster bracket, characterized in that, The battery housing includes a frame assembly, a cold plate, and a reinforcing assembly. The frame assembly and the cold plate form a receiving space for accommodating the battery cells, and the cold plate is sandwiched between the frame assembly and the reinforcing assembly. The reinforcing component includes a first reinforcing rib, which is configured to extend along the length and / or width direction of the cold plate. The first reinforcing rib is provided with at least a recessed portion and a connecting portion. The top surface of the connecting portion is connected to the bottom surface of the cold plate. The recessed portion is recessed in a direction away from the cold plate, and the bottom of the recessed portion is used to abut against the battery cluster bracket.

2. The battery housing according to claim 1, characterized in that, The depth h of the recessed portion satisfies 0.5cm≤h≤5cm.

3. The battery housing according to claim 1, characterized in that, The angle R between the edge of the recess and the cold plate satisfies 15°≤R≤70°.

4. The battery housing according to claim 1, characterized in that, There are two connecting parts, which are respectively located on both sides of the recessed part.

5. The battery housing according to claim 1, characterized in that, The width n of the connection part near the edge of the cold plate satisfies 1cm≤n≤10cm.

6. The battery housing according to claim 1, characterized in that, The first reinforcing rib is configured as at least two ribs along the length or width direction of the cold plate, and is respectively disposed opposite to each other on the two edge regions of the cold plate.

7. The battery housing according to claim 1, characterized in that, The contact length between the first reinforcing rib and the cold plate along the length direction is P, and the total length of the cold plate is Q, wherein the ratio of P / Q satisfies 0.75≤P / Q≤1, and P and Q have the same unit.

8. The battery housing according to claim 1, characterized in that, The first reinforcing rib is configured to extend along the length direction of the cold plate; The first reinforcing rib contacts the cold plate for a length L in the width direction of the cold plate, and the total width of the cold plate is M, wherein the ratio of L / M satisfies 0.05≤L / M≤0.5, and L and M have the same unit.

9. The battery housing according to claim 8, characterized in that, The reinforcing component further includes a second reinforcing rib, which is disposed in the middle region of the cold plate along the length direction of the cold plate; The L / M ratio satisfies 0.05 ≤ L / M ≤ 0.

3.

10. The battery housing according to claim 1, characterized in that, The first reinforcing rib is configured to extend along the length and width directions of the cold plate; The first reinforcing rib contacts the cold plate for a length L in the width direction of the cold plate, and the total width of the cold plate is M, wherein the ratio of L / M satisfies 0.05≤L / M≤0.

25.

11. The battery housing according to claim 10, characterized in that, The reinforcing component further includes a second reinforcing rib, which is disposed in the middle region of the cold plate along the length direction of the cold plate; The L / M ratio satisfies 0.05 ≤ L / M ≤ 0.

23.

12. The battery housing according to claim 11, characterized in that, The reinforcing component further includes a third reinforcing rib, which is disposed in the middle region of the cold plate along the width direction of the cold plate. The L / M ratio satisfies 0.05 ≤ L / M ≤ 0.

2.

13. The battery housing according to claim 1, characterized in that, The frame assembly, the cold plate, and the connecting part are connected by fasteners; The width of the connection portion near the edge of the cold plate is greater than the diameter of the fastener.

14. The battery housing according to claim 1, characterized in that, The cold plate includes a refrigerant channel, and the projection of the connecting part in the vertical direction of the cold plate is misaligned with the refrigerant channel.

15. The battery housing according to claim 1, characterized in that, The recess is a single portion, extending from one end of the first reinforcing rib to the other end, or... There are at least two recesses, which are spaced apart along the length or width of the first reinforcing rib.

16. A battery pack, characterized in that, The battery includes a battery housing, battery cells, and a top cover, wherein the top cover is disposed on the battery housing, the battery cells are installed inside the battery housing, and the battery housing is the battery housing as described in any one of claims 1-15.

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