Battery pack lower box body, battery pack and vehicle

Abstract

The utility model discloses a battery pack lower box body, a battery pack and a vehicle, the battery pack lower box body comprises a liquid cooling plate and a lower box body main body, the lower box body main body is manufactured and formed by a thermoplastic reset material through an integrated forming process, and the lower box body main body is connected with the liquid cooling plate. Namely, according to the lower box body of the battery pack, the lower box body main body can be made of the low-cost thermoplastic composite material by adopting an integrated forming process, and the assembly connection between the liquid cooling plate and the lower box body main body is realized, so that on one hand, the structural integration and the structural strength of the lower box body of the battery pack can be improved; the carbon emission during the manufacturing of the lower box body of the battery pack is reduced, and the overall weight and the manufacturing cost of the lower box body of the battery pack are reduced; and on the other hand, the lower box body of the battery pack has better insulation and heat insulation performance and heat preservation performance so as to meet the use requirements of the battery pack.

Description

Technical Field

[0001] This utility model belongs to the technical field of vehicle power batteries, and in particular relates to a battery pack lower box, a battery pack, and a vehicle. Background Technology

[0002] Currently, the lower casing of battery packs on the market is mainly composed of two materials: extruded aluminum and rolled steel. This results in a relatively heavy overall weight of the lower casing, requiring multiple welding or mechanical connection processes to assemble it into a whole. It also requires anti-corrosion treatments such as electrophoresis and anodizing. In addition, since the lower casing of the battery pack is made of metal, its thermal and electrical conductivity are relatively high. Therefore, additional insulation and heat preservation materials are needed to ensure the insulation safety and heat preservation of the lower casing of the battery pack, which makes the overall manufacturing cost of the lower casing of the battery pack high. Utility Model Content

[0003] In view of this, it is necessary to provide a battery pack lower housing, a battery pack, and a vehicle for solving the above-mentioned technical problems.

[0004] A battery pack lower housing, characterized in that the battery pack lower housing comprises:

[0005] Liquid cooling plate;

[0006] The lower housing body is made of thermoplastic composite material using an integrated molding process, and is connected to the liquid cooling plate.

[0007] Understandably, using low-cost thermoplastic composite materials and an integrated molding process to manufacture the lower housing body, and assembling the liquid cooling plate with the lower housing body, can improve the structural integration and strength of the lower housing of the battery pack, reduce carbon emissions during its manufacturing, and lower the overall weight and manufacturing cost of the lower housing. Furthermore, it can also give the lower housing better insulation and heat preservation properties to meet the usage requirements of the battery pack.

[0008] In one embodiment, the lower housing body includes a lower housing tray, which is formed by a molding process;

[0009] The liquid cooling plate is attached to the lower housing tray, and the lower housing tray and the liquid cooling plate are connected at the contact points.

[0010] It is understandable that the lower housing tray is manufactured using a molding process so that it can be used as the main load-bearing structure of the lower housing of the battery pack.

[0011] In one embodiment, the liquid cooling plate includes a lower flow channel plate and an upper cover plate, the upper cover plate covering the lower flow channel plate so that a liquid cooling flow channel is formed between the lower flow channel plate and the upper cover plate;

[0012] The side of the lower flow channel plate facing away from the upper cover plate is attached to the lower box tray.

[0013] In one embodiment, the lower flow channel plate and the upper cover plate are provided with through holes, and the through holes are provided independently of the liquid cooling flow channel;

[0014] The lower housing body also includes a through connector, which is formed in the through hole by injection molding and is connected to the lower flow channel plate, the upper cover plate and the lower housing tray respectively.

[0015] It is understandable that using one-piece injection molded through connectors to connect the lower flow channel plate, upper cover plate, and lower housing tray can further improve the connection strength when the liquid cooling plate is assembled on the lower housing tray.

[0016] In one embodiment, a cavity is formed between the lower flow channel plate and the lower box tray;

[0017] The cavity is filled with a filling material.

[0018] It is understandable that filling the cavity formed between the lower flow channel plate and the lower housing tray with filler material allows the filler material to provide structural support for the assembly of the lower flow channel plate on the lower housing tray, preventing the lower flow channel plate from deforming under pressure.

[0019] In one embodiment, the lower housing tray surrounds the liquid cooling plate;

[0020] The outer peripheral surface of the liquid cooling plate is attached to the lower housing tray.

[0021] In one embodiment, the lower housing body further includes a honeycomb component, which is injection molded onto the bottom of the lower housing tray.

[0022] It is understandable that a honeycomb component is injection molded at the bottom of the lower box pallet, which can protect the bottom surface of the lower box pallet and improve the rigidity of the main structure of the lower box.

[0023] In one embodiment, the lower housing body further includes a protective component, which is injection molded onto the outer periphery of the lower housing tray.

[0024] It is understandable that protective components are injection molded on the outer periphery of the lower box pallet. This can protect the lower box pallet from side collisions and improve the rigidity of the main structure of the lower box.

[0025] This application also claims protection for a battery pack, including the lower housing of the battery pack described above.

[0026] This application also seeks protection for a vehicle including the aforementioned battery pack underbox.

[0027] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0028] The battery pack lower housing, battery pack, and vehicle claimed in this application are manufactured using a low-cost thermoplastic composite material and injection molding process. The liquid cooling plate is assembled and connected to the lower housing body. This improves the structural integration and strength of the battery pack lower housing and reduces carbon emissions during its manufacture, thus reducing the overall weight and manufacturing cost. Furthermore, it provides better insulation and heat preservation properties to meet the usage requirements of the battery pack. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a structural schematic diagram of the lower casing of the battery pack provided in this application.

[0031] Figure 2 This is a partial sectional view of the lower casing of the battery pack provided in this application from another perspective.

[0032] Reference numerals: 100, lower housing of battery pack; 101, cavity; 10, liquid cooling plate; 11, lower flow channel plate; 12, upper cover plate; 110, liquid cooling flow channel; 120, through hole; 20, main body of lower housing; 21, lower housing tray; 22, through connector; 23, honeycomb component; 24, protective component; 30, filler. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that when a component is said to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or may have an intervening component.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] like Figure 1 As shown, an embodiment of this application provides a battery pack lower housing 100, including a liquid cooling plate 10 and a lower housing body 20. The lower housing body 20 is formed from a thermoplastic resilient material using an integrated molding process, and the lower housing body 20 is connected to the liquid cooling plate 10. In other words, the battery pack lower housing 100 can be manufactured as a whole using the liquid cooling plate 10 as an insert, using an integrated molding process.

[0037] As can be seen from the above, the lower housing 100 of the battery pack in this application can be manufactured using a low-cost thermoplastic composite material with an integrated molding process to form the lower housing body 20, and to achieve the assembly connection between the liquid cooling plate 10 and the lower housing body 20. This can improve the structural integration and structural strength of the lower housing 100 of the battery pack and reduce the carbon emissions during the manufacturing of the lower housing 100 of the battery pack, thus reducing the overall weight and manufacturing cost of the lower housing 100 of the battery pack. On the other hand, it can also give the lower housing 100 of the battery pack better insulation and heat insulation performance to meet the usage requirements of the battery pack.

[0038] like Figure 2As shown, in one embodiment, the liquid cooling plate 10 includes a lower flow channel plate 11 and an upper cover plate 12. The upper cover plate 12 covers the lower flow channel plate 11, so that a liquid cooling flow channel 110 is formed between the lower flow channel plate 11 and the upper cover plate 12. Here, both the lower flow channel plate 11 and the upper cover plate 12 are made of metal. It should be noted that the specific structure of the lower flow channel plate 11 and the upper cover plate 12, and how they cooperate to form the liquid cooling flow channel 110, can all adopt existing conventional methods, and will not be elaborated here.

[0039] like Figure 1 , Figure 2 As shown, in one embodiment, the lower housing body 20 includes a lower housing tray 21, which is formed by molding to serve as the main load-bearing structure of the battery pack lower housing 100. Here, the material of the lower housing tray 21 can specifically be a continuous glass fiber reinforced thermoplastic composite. It is understood that in other embodiments, the material of the lower housing tray 21 can also be a continuous carbon fiber composite material, which will not be elaborated upon here.

[0040] like Figure 1 , Figure 2 As shown, in this embodiment, the liquid cooling plate 10 is attached to the lower housing tray 21, and the parts of the lower housing tray 21 and the liquid cooling plate 10 that are in contact are connected. That is, all the contacting parts of the lower housing tray 21 and the liquid cooling plate 10 are connected together.

[0041] like Figure 2 As shown, in this embodiment, the side of the lower flow channel plate 11 facing away from the upper cover plate 12 is attached to the lower box tray 21, thereby realizing the assembly connection between the lower flow channel plate 11 and the lower box tray 21.

[0042] like Figure 2 As shown, a cavity 101 is formed between the lower flow channel plate 11 and the lower housing tray 21, and a filler 30 is provided in the cavity 101. The filler 30 provides structural support for the assembly of the lower flow channel plate 11 on the lower housing tray 21, preventing the lower flow channel plate 11 from deforming under pressure. Here, the filler 30 is a foam component, rubber component, etc.

[0043] like Figure 1 As shown, in this embodiment, the lower housing tray 21 surrounds the liquid cooling plate 10; and the outer peripheral surface of the liquid cooling plate 10 is attached to the lower housing tray 21, thereby realizing the assembly connection between the flow channel lower plate 11 and the lower housing tray 21.

[0044] like Figure 2As shown, in one embodiment, the lower flow channel plate 11 and the upper cover plate 12 are perforated by through holes 120. These through holes 120 are independent of the liquid cooling flow channel 110, meaning they are positioned away from it. Correspondingly, the lower housing body 20 also includes a through connector 22, which is injection molded into the through hole 120 and connected to the lower flow channel plate 11, the upper cover plate 12, and the lower housing tray 21. In other words, the liquid cooling plate 10 can also be fixed to the lower housing tray 21 using the through connector 22 passing through the through hole 120, thus further improving the connection strength of the liquid cooling plate 10 when assembled on the lower housing tray 21. Here, there are multiple through holes 120. It should be noted that the number of through holes 120 and their arrangement on the liquid cooling plate 10 can be specifically configured according to the application requirements, and will not be elaborated upon here.

[0045] like Figure 1 , Figure 2 As shown, in one embodiment, the lower housing body 20 further includes a honeycomb component 23, which is injection molded onto the bottom of the lower housing tray 21. In other words, the honeycomb component 23 can protect the bottom surface of the lower housing tray 21 and improve the structural rigidity of the lower housing body 20.

[0046] like Figure 1 , Figure 2 As shown, in one embodiment, the lower box body 20 further includes a protective member 24, which is injection molded onto the outer periphery of the lower box tray 21. In other words, the protective member 24 can protect the lower box tray 21 from lateral impacts and improves the structural rigidity of the lower box body 20.

[0047] It should be noted that the aforementioned through-connector 22, honeycomb component 23, and protective component 24 can be integrally injection molded onto the lower housing tray 21 using a discontinuous glass fiber reinforced thermoplastic restoring material. It is understood that in other embodiments, the materials of the aforementioned through-connector 22, honeycomb component 23, and protective component 24 can also be discontinuous carbon fiber composite materials, which will not be elaborated upon here.

[0048] In summary, when manufacturing the lower housing 100 of the battery pack of this application, the lower housing tray 21 can be first formed in a mold using a continuous glass fiber reinforced thermoplastic reset material through a molding process. Then, the liquid cooling plate 10 is placed into the lower housing tray 21. After that, the above-mentioned through connector 22, honeycomb component 23 and protective component 24 are obtained by injection molding, and finally the lower housing 100 of the battery pack is obtained.

[0049] This application also provides a battery pack, including the lower housing 100 of the battery pack described above.

[0050] In addition, this application also claims protection for a vehicle including the aforementioned battery pack lower housing 100.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any appropriate changes and variations made to the above embodiments within the scope of the essential spirit of the present utility model shall fall within the scope of protection claimed by the present utility model.

Claims

1. A battery pack lower case characterized by comprising: The lower housing (100) of the battery pack includes: Liquid cooling plate (10); The lower housing body (20) is made of thermoplastic composite material using an integrated molding process, and the lower housing body (20) is connected to the liquid cooling plate (10); The lower housing body (20) includes a lower housing tray (21), which is formed by molding process; wherein, the liquid cooling plate (10) is attached to the lower housing tray (21), and the lower housing tray (21) and the liquid cooling plate (10) are connected at the part that is attached to each other. The liquid cooling plate (10) includes a lower flow channel plate (11) and an upper cover plate (12). The upper cover plate (12) covers the lower flow channel plate (11) so that a liquid cooling flow channel (110) is formed between the lower flow channel plate (11) and the upper cover plate (12). The side of the lower flow channel plate (11) facing away from the upper cover plate (12) is attached to the lower box tray (21).

2. The battery pack lower case according to claim 1, characterized by, The lower plate (11) of the flow channel and the upper cover plate (12) are provided with through holes (120), and the through holes (120) are provided independently of the liquid cooling flow channel (110); The lower housing body (20) also includes a through connector (22), which is formed in the through hole (120) by injection molding and is connected to the lower flow channel plate (11), the upper cover plate (12) and the lower housing tray (21) respectively.

3. The battery pack lower case according to claim 1, characterized by, A cavity (101) is formed between the lower flow channel plate (11) and the lower box tray (21). The cavity (101) is filled with a filler (30).

4. The lower housing of the battery pack according to claim 1, characterized in that, The lower housing tray (21) is arranged to surround the liquid cooling plate (10); The outer peripheral surface of the liquid cooling plate (10) is attached to the lower housing tray (21).

5. The battery pack lower case of claim 1, wherein, The lower box body (20) also includes a honeycomb component (23), which is formed on the bottom of the lower box tray (21) by injection molding.

6. The battery pack lower case of claim 1, wherein, The lower box body (20) also includes a protective component (24), which is formed on the outer periphery of the lower box tray (21) by injection molding.

7. A battery pack, characterized by, Includes the lower housing (100) of the battery pack as described in any one of claims 1 to 6.

8. A vehicle characterized by comprising: Includes the lower housing (100) of the battery pack as described in any one of claims 1 to 7.

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