Power battery box body, power battery assembly and vehicle

Abstract

The utility model discloses a power battery box body which comprises a plurality of first beam bodies which are connected with one another, and the first beam bodies are made of rolling profiles. The power battery box body disclosed by the utility model is better in compatibility, is beneficial to the structure of product expansion, and can meet the design requirements of different vehicle types, different electric quantities, different thermal management requirements and different installation modes. The utility model further discloses a power battery assembly and a vehicle.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobiles, and specifically relates to a power battery box, a power battery assembly and a vehicle. Background Art

[0002] At present, new energy power battery boxes generally use aluminum profiles, stamping welding, and bending welding. To a certain extent, the above solutions have certain defects and shortcomings, such as high unit cost, high mold cost, and complex process.

[0003] New energy power batteries generally require a thermal management system. The battery cells or modules need to be heated or cooled to ensure that the power battery operates within the appropriate temperature range to ensure product performance and extend service life. The current battery thermal management adopts a liquid cooling system. Generally, the liquid cooling plate is located separately at the bottom of the box and the lower part of the module. Other materials such as aluminum profiles can also be integrated with the lower box. Stamping welding and bending welding both require separate liquid cooling plates. In terms of heating, a separate heating film, PTC plate or liquid cooling plate is required for heating. However, the above structures have poor compatibility with the box, long processing and manufacturing costs and cycles, and poor scalability.

[0004] Chinese patent application number 202311606477.X discloses an integrated power battery system, including an upper box and a lower box. The upper box cover is closed on the lower box to form a battery box. The upper box is provided with an electronic control unit. The electronic control unit is electrically integrated with a connector port of a fast charging platform. The connector port extends out of the upper box through a window opened on the upper box, and is used to provide a circuit interface for equipment outside the box. A battery cell module controlled by the electronic control unit is provided in the lower box. A liquid cooling system fixed on the battery cell module and / or the electronic control unit is provided between the electronic control unit and the battery cell module. The relative surfaces of the liquid cooling system are in contact with the electronic control unit and the battery cell module respectively, and heat exchange can be carried out between the three, thereby improving the heat dissipation efficiency of the power battery system. At the same time, the present invention can also integrate the battery cell module, liquid cooling system and electronic control unit on the same box, reducing the volume of the power battery system and improving the system energy density of the power battery system.

[0005] It is hoped to provide an improved power battery case, particularly with regard to improving the compatibility of the power battery case. Utility Model Content

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a power battery box to improve compatibility.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: the power battery box includes a plurality of connected first beams, and the first beams are made of rolled profiles.

[0008] The cross section of the rolled profile is in the shape of a Japanese character, a Chinese character, an L-shape, a convex shape or a rectangle.

[0009] The two first beams are connected by welding.

[0010] The first beam body is provided with a lifting lug for connecting with the automobile body.

[0011] A second beam body for connecting with a vehicle body is arranged on the first beam body, and a pipe sleeve is arranged on the second beam body.

[0012] The material of the second beam is the same as that of the first beam, and the two are integrally formed.

[0013] The utility model also provides a power battery assembly, comprising a liquid cooling plate and the power battery box, wherein the liquid cooling plate is connected to the power battery box.

[0014] The liquid cooling plate is integrated with a PTC heating plate.

[0015] A PTC heating plate is arranged in the power battery box.

[0016] The utility model also provides a vehicle, comprising the power battery assembly.

[0017] The power battery box of the present invention has good compatibility and a structure that is conducive to product expansion, and can meet the design requirements of different vehicle models, different power levels, different thermal management needs, and different installation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an exploded view of the power battery box;

[0019] Figure 2 It is a cross-sectional view of different profiles;

[0020] Figure 3 This is a structural diagram of the profile and the fixing nuts on the profile;

[0021] Figure 4 It is the structure and cross-section diagram of the liquid cooling plate;

[0022] Figure 5 This is the structure and cross-sectional diagram of the PTC heating plate;

[0023] Figure 6 This is the structure and cross-sectional diagram of the liquid cooling plate integrated with the PTC heating plate;

[0024] Figure 7 It is the fixing structure of the bottom plate of the box (bolt installation, welding fixation);

[0025] Figure 8This is a schematic diagram of the box and vehicle installation structure Figure 1 ;

[0026] Figure 9 This is a schematic diagram of the box and vehicle installation structure Figure 2 ;

[0027] Figure 10 This is a schematic diagram of the box and vehicle installation structure Figure 3 ;

[0028] The markings in the above figures are: 1. lower base plate; 2. power battery box; 3. liquid cooling plate; 4. first beam; 5. second beam. DETAILED DESCRIPTION

[0029] The following is a further detailed description of the specific implementation methods of the present invention by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and to facilitate its implementation.

[0030] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower" and similar expressions used in this article are for illustrative purposes only.

[0031] It should be noted that, in the following embodiments, the "first" and "second" do not represent an absolute distinction in structure and / or function, nor do they represent a sequence of execution, but are merely for the convenience of description.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which the present invention pertains. The terminology used herein in the specification of the present invention is for the purpose of describing specific embodiments and is not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0033] like Figures 1 to 10 As shown, the utility model provides a power battery box, including a plurality of connected first beams, and the first beams are made of rolled profiles.

[0034] Specifically, if Figure 1 As shown, the power battery box is a rectangular structure, and there are four first beams in total. The four first beams are arranged opposite to each other in pairs, and two adjacent first beams are vertically connected, and the two connected first beams are welded.

[0035] The power battery case adopts a profile structure design. Under certain cross-sectional conditions, it can achieve flexible design and development of the case to meet different design fixing methods, different sizes, and installation requirements without changing the mold. Different cases can be flexibly developed by using several common cross-sectional profiles.

[0036] The power battery box can be compatible with different thermal management design requirements, including liquid cooling plates, PTC heating plates, and integrated liquid cooling plates and PTCs. The box can also eliminate the above cooling or heating structures, which fully demonstrates the advantages of flexible development of power battery boxes.

[0037] Different profile structures can meet the installation requirements of different module structures. The module is fixed by long bolts passing through the module end plate and locked on the profile beam. The profile beam is provided with rivets or welded nuts to play a fixing role.

[0038] The power battery box and vehicle body can be installed in a variety of ways, either through adapter brackets or by welding profile spacers. All of these can be achieved without modifying the mold, reflecting the flexible design requirements of the power battery box. Flexible development and design can shorten development cycles and costs, accelerate product development iterations to a certain extent, and facilitate product upgrades and performance upgrades.

[0039] The advantage of the above innovations is that various power battery solutions can be combined through profiles with different cross-sections and different thermal management systems, which fully reflects the requirements of flexible design, reduces development costs, and shortens the development cycle; the profile is a closed-section design, which can reduce the material thickness to a certain extent, reduce the weight of the box, and achieve the purpose of weight reduction.

[0040] Through the closed cross-section design of the profile, the overall structural strength of the power battery box is also greatly enhanced, which improves the strength and rigidity of the box and enhances the safety of the power battery system.

[0041] Rolled profiles are formed by rolling rolled strips and laser welding, which can save raw materials and increase processing speed.

[0042] like Figure 2 As shown, the cross-section of the rolled profile is closed and can be shaped like a Japanese character, a Chinese character, an L-shaped character, a convex character, or a rectangle. This structural design can meet the installation and fixturing requirements of different components, providing a certain degree of expansion and compatibility. The power battery case can be customized to the length and width required by different battery packs without changing the profile mold, simply by adjusting the welding fixture to meet the expansion needs of different battery sizes.

[0043] According to different installation requirements, the battery pack external mounting point and the vehicle body can be connected and fixed; the connection and fixation can be a separate lifting lug adapter to achieve the connection between the vehicle body and the battery; or it can be made into an integrated connection with the box profile. This connection method requires adding a pipe sleeve to the box side beam profile to play a role in strengthening and sealing.

[0044] like Figure 7 and Figure 8 As shown, the first beam body is provided with a plurality of lifting eyes for connecting with the automobile body.

[0045] like Figure 9 and Figure 10 As shown, a second beam body for connecting to the automobile body is provided on the first beam body, a plurality of pipe sleeves are provided on the second beam body, and the material of the second beam body is the same as that of the first beam body, and the two are integrally formed.

[0046] like Figure 1 As shown, the present invention also provides a power battery assembly, including a lower base plate, a liquid cooling plate and a power battery box of the above structure, wherein the liquid cooling plate is connected to the power battery box.

[0047] like Figure 1 As shown, the liquid cooling plate is a structure formed by stamping and brazing, which is fixed to the profile at the bottom of the power battery box from the bottom, and then the lower base plate is installed; the liquid cooling plate can also be fixed to the box bottom plate and assembled and fixed from the inside.

[0048] Preferably, the liquid cooling plate is integrated with PTC heating, and the PTC heating plate can be integrated into the bottom of the liquid cooling plate and fixed in the same manner as described above.

[0049] As a variant implementation scheme, a PTC heating plate is provided in the power battery case. The PTC heating plate is not integrated into the liquid cooling plate. The PTC heating plate can be fixed separately in the power battery case in the same manner as described above.

[0050] As another variant implementation, the liquid cooling plate or the liquid cooling plate with integrated PTC heating plate can be fixed to the bottom of the power battery case by bolts or by blind rivets.

[0051] like Figure 1 As shown, the power battery box of the above structure needs to be provided with a bottom plate to achieve the sealing and structural strength requirements of the box. The fixing method between the lower bottom plate and the power battery box can be through bolt connection, welding, etc. The lower bottom plate is fixed to the bottom of the power battery box, and a sealing gasket is provided between the lower bottom plate and the power battery box to achieve a sealing effect.

[0052] The present invention also provides a vehicle, including a power battery assembly of the above structure, the power battery assembly including a power battery box of the above structure. The specific structure of the power battery box can be referred to Figures 1 to 10 Since the vehicle of the present invention includes the power battery box in the above embodiment, it has all the advantages of the above power battery box.

[0053] The advantages of the above structure are that various power battery solutions can be combined using profiles of varying cross-sections and different thermal management systems, fully embodying the requirements of flexible design, reducing development costs, and shortening development cycles. The closed-section design of the profiles can reduce material thickness and box weight to a certain extent, achieving the goal of weight reduction. The closed-section design of the profiles also significantly enhances the overall structural strength of the box, improving its strength and rigidity, and enhancing the safety of the power battery system. Rolled profiles are formed by roll-forming rolled strips and then laser-welded, saving raw materials and increasing processing speed.

[0054] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. Power battery box, characterized by: It comprises a plurality of connected first beam bodies, wherein the first beam bodies are made of rolled profiles; A second beam body for connecting to the vehicle body is provided on the first beam body, and a plurality of pipe sleeves are provided on the second beam body; The material of the second beam body is the same as that of the first beam body, and the two are integrally formed.

2. The power battery box according to claim 1, characterized in that: The cross section of the rolled profile is in the shape of a Japanese character, a Chinese character, an L-shape, a convex shape or a rectangle.

3. The power battery box according to claim 1, characterized in that: The two first beams are connected by welding.

4. The power battery box according to any one of claims 1 to 3, characterized in that: The first beam body is provided with a lifting lug for connecting with the automobile body.

5. Power battery assembly, characterized by: It comprises a liquid cooling plate and a power battery box according to any one of claims 1 to 4, wherein the liquid cooling plate is connected to the power battery box.

6. The power battery assembly according to claim 5, characterized in that: The liquid cooling plate is integrated with a PTC heating plate.

7. The power battery assembly according to claim 5, characterized in that: A PTC heating plate is arranged in the power battery box.

8. A vehicle, characterized in that: A power battery assembly comprising any one of claims 5 to 7.

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