Battery pack and vehicle

Abstract

The utility model discloses a battery pack and a vehicle, and relates to the technical field of battery packs, the battery pack comprises: a box body, the box body forms a mounting cavity with a mounting port; the reinforcing beam is arranged in the mounting cavity, a reinforcing cavity with an opening is formed in the reinforcing beam, and the opening is back to the mounting opening; and the reinforcing body is arranged in the reinforcing cavity. According to the technical scheme provided by the utility model, the technical problem that the existing battery pack is relatively weak in structural strength is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a battery pack and a vehicle. Background Art

[0002] With the advancement of technology and economic development, new energy vehicles have developed rapidly. The power battery system is the core component of new energy vehicles and can provide driving power for new energy vehicles. An important component of the power battery system is the battery pack, which is composed of one or more battery cells (battery cells) connected in series or parallel and fixed in the battery box. Limited by the structure of the existing battery pack, the structural strength of the battery pack is poor and it is easy to crack during vibration, which in turn affects the normal use of the battery pack. Utility Model Content

[0003] The main purpose of the utility model is to provide a battery pack and a vehicle, aiming to solve the technical problem that the existing battery pack has weak structural strength.

[0004] To achieve the above objectives, the present invention provides a battery pack, which includes:

[0005] A box body, wherein the box body forms a mounting cavity having a mounting opening;

[0006] a reinforcing beam disposed in the installation cavity, the reinforcing beam forming a reinforcing cavity having an opening, the opening facing away from the installation opening; and

[0007] The reinforcement body is arranged in the reinforcement cavity.

[0008] In one embodiment, the reinforcement body includes a reinforcement bottom plate and a reinforcement side plate connected to the reinforcement bottom plate, the reinforcement bottom plate is connected to the bottom surface of the installation cavity, and the reinforcement side plate is connected to the side surface of the reinforcement cavity.

[0009] In one embodiment, two reinforcing side plates are provided, and the two reinforcing side plates are arranged on both sides of the reinforcing bottom plate.

[0010] In one embodiment, the two reinforcing side plates extend away from each other at one end of the reinforcing bottom plate.

[0011] In one embodiment, the reinforcement body further includes a reinforcement base, a mounting position is provided on the reinforcement beam, the reinforcement base is arranged corresponding to the mounting position, and the reinforcement base connects the reinforcement beam and the reinforcement side plate.

[0012] In one embodiment, the reinforcing base includes a base plate and a nut seat disposed on the base plate, the base plate connects the reinforcing beam and the reinforcing side plate, and the nut seat faces the opening.

[0013] In one embodiment, the reinforcing side plate is provided with an escape notch for accommodating the nut seat.

[0014] In one embodiment, the reinforcing base and the reinforcing beam are welded; and / or, the reinforcing base and the reinforcing side plate are welded; and / or, the reinforcing bottom plate and the box body are welded; and / or, the reinforcing beam and the box body are bonded by an adhesive.

[0015] In one embodiment, the reinforcement body is disposed near an end of the reinforcement beam;

[0016] And / or, the battery pack further comprises a reinforcing support, which is arranged on a side of the reinforcing beam facing the mounting opening and connects the reinforcing beam and the box body;

[0017] And / or, the reinforcing beam is provided with a flange at one end close to the opening, the flange extends away from the opening, and the flange abuts against the bottom surface of the box body;

[0018] And / or, the box body is formed by stamping or bending sheet metal.

[0019] To achieve the above objectives, an embodiment of the present invention provides a vehicle, which includes the battery pack described above.

[0020] Compared with the prior art, in a technical solution proposed by the utility model, a plurality of battery cells can be combined in the installation cavity by means of a box body, so as to protect the battery cells, prevent the battery cells from being subjected to external impact, and improve the safety of the battery pack. In addition, by means of a reinforcing beam arranged in the installation cavity, the structural rigidity of the box body can be improved, and the modal of the entire battery pack will also be improved accordingly, thereby improving the safety of the battery pack during vibration or collision. At the same time, the reinforcing beam in the present application forms a reinforcing cavity with an opening. It can be understood that the reinforcing beam is a hollow structure, which can reduce the weight of the reinforcing beam, thereby reducing the mass of the entire battery pack structure, meeting the lightweight design requirements, and is conducive to improving the cruising range of electric vehicles. Moreover, a reinforcing body is arranged in the reinforcing cavity, which can improve the structural strength of the reinforcing beam on the one hand, and improve the connection strength between the reinforcing beam and the box body on the other hand, further improving the structural strength of the battery pack, preventing cracking during vibration or collision, and thereby improving the service life of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the structure of a battery pack embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the battery pack embodiment of the utility model after the reinforcing beam is removed;

[0024] Figure 3 This is a schematic diagram of an exploded structure after the box body is removed in the battery pack embodiment of the utility model;

[0025] Figure 4 This is another exploded structural schematic diagram of the battery pack embodiment of the utility model after the box body is removed;

[0026] Figure 5 This is a schematic diagram of the structure of the reinforcing base in the battery pack embodiment of the utility model;

[0027] Figure 6 This is a schematic diagram of the structure at an angle after the box body is removed in the battery pack embodiment of the utility model.

[0028] Description of Figure Numbers:

[0029] 100, box body; 110, installation cavity; 200, reinforcement beam; 300, reinforcement body; 310, reinforcement bottom plate; 320, reinforcement side plate; 330, reinforcement base; 331, base plate; 332, nut seat; 400, reinforcement support; 500, flange;

[0030] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the utility model.

[0032] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the embodiments of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0035] In addition, the technical solutions between the various embodiments of the present utility model can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the embodiments of the present utility model.

[0036] The power battery system is the core component of new energy vehicles and can provide driving power for new energy vehicles. An important component of the power battery system is the battery pack, which is composed of one or more battery cells (battery cells) connected in series or parallel and fixed in the battery box. The battery pack is prone to cracking during vibration.

[0037] In view of this, an embodiment of the utility model provides a battery pack and a vehicle, in which a reinforcement body is arranged in the reinforcement cavity of the reinforcement beam, which can improve the structural strength of the reinforcement beam on the one hand, and improve the connection strength between the reinforcement beam and the box body on the other hand, thereby further improving the structural strength of the battery pack, preventing cracking during vibration or collision, and thereby improving the service life of the battery pack.

[0038] In order to better understand the above technical solution, the above technical solution is described in detail below with reference to the accompanying drawings.

[0039] like Figure 1 and Figure 2 As shown, the embodiment of the utility model provides a battery pack, the battery pack comprising:

[0040] The box body 100 forms a mounting cavity 110 with a mounting opening;

[0041] A reinforcing beam 200 is disposed in the installation cavity 110, and the reinforcing beam 200 forms a reinforcing cavity with an opening, and the opening faces away from the installation opening; and

[0042] The reinforcement body 300 is disposed in the reinforcement cavity.

[0043] In the technical solution adopted in this embodiment, through the case 100, multiple battery cells can be combined in the installation cavity 110 to protect the battery cells, prevent the battery cells from being hit by external impact, and improve the safety of the battery pack. In addition, by setting the reinforcing beam 200 in the installation cavity 110, the structural rigidity of the case 100 can be improved, and the modal of the entire battery pack will also be improved accordingly, thereby improving the safety of the battery pack during vibration or collision. At the same time, the reinforcing beam 200 in the present application forms a reinforcing cavity with an opening. It can be understood that the reinforcing beam 200 is a hollow structure, which can reduce the weight of the reinforcing beam 200, thereby reducing the mass of the entire battery pack structure, meeting the lightweight design requirements, and is conducive to improving the cruising range of electric vehicles. Moreover, a reinforcing body 300 is set in the reinforcing cavity, which can improve the structural strength of the reinforcing beam 200 on the one hand, and improve the connection strength between the reinforcing beam 200 and the case 100 on the other hand, further improving the structural strength of the battery pack, preventing cracking during vibration or collision, and thus improving the service life of the battery pack.

[0044] As an optional method, the reinforcement body 300 can be a rib plate, connecting at least two side walls of the reinforcement cavity and connected to the box body 100, so that the connection strength between the reinforcement beam 200 and the box body 100 can be improved on the basis of adding the reinforcement beam 200. In one embodiment, a plurality of reinforcement bodies 300 can be arranged at intervals along the length direction of the reinforcement beam 200, so that support can be provided at multiple different positions of the reinforcement beam 200, further increasing the structural rigidity of the reinforcement beam 200, and thus improving the modality of the entire battery pack.

[0045] During the vibration of the battery pack, the connection between the side wall of the box body 100 and the end of the reinforcing beam 200 is weak and prone to cracking. For this reason, in one embodiment of the present application, the reinforcing body 300 is arranged near the end of the reinforcing beam 200, that is, the reinforcing body 300 is arranged near the connection between the side wall of the box body 100 and the end of the reinforcing beam 200. This can improve the connection strength between the side wall of the box body 100 and the end of the reinforcing beam 200, prevent cracking in the connection area, and help improve the structural strength of the battery pack. As an optional method, a reinforcing body 300 is respectively provided at both ends of the reinforcing beam 200 along the length direction.

[0046] In one embodiment of the present invention, referring to Figure 3 and Figure 4 The reinforcement body 300 includes a reinforcement bottom plate 310 and a reinforcement side plate 320 connected to the reinforcement bottom plate 310 . The reinforcement bottom plate 310 is connected to the bottom surface of the installation cavity 110 , and the reinforcement side plate 320 is connected to the side surface of the reinforcement cavity.

[0047] Specifically, the reinforcement body 300 includes a reinforcement bottom plate 310 and a reinforcement side plate 320. The reinforcement bottom plate 310 is arranged in the reinforcement cavity and connected to the bottom surface of the installation cavity 110. The reinforcement side plate 320 is arranged on the side of the reinforcement bottom plate 310 away from the bottom surface of the box body 100. It can be understood that one end of the reinforcement side plate 320 is connected to the reinforcement bottom plate 310, and the other end of the reinforcement side plate 320 is connected to the side of the reinforcement cavity. In this way, the reinforcement beam 200 and the box body 100 are connected and fixed together, which improves the connection strength between the reinforcement beam 200 and the box body 100, and further improves the rigidity and overall mode of the battery pack. As an optional method, the reinforcement side plate 320 and the reinforcement bottom plate 310 are bent and formed as a whole, which can save the number of connecting parts used and improve the connection reliability of the reinforcement side plate 320 and the reinforcement bottom plate 310. In one embodiment, the reinforcement side plate 320 is welded to the side of the reinforcement cavity, which can ensure the connection strength of the reinforcement side plate 320 and the reinforcement beam 200. Optionally, the reinforcing bottom plate 310 is welded or bonded to the bottom surface of the mounting cavity 110 , which is not limited here.

[0048] In an embodiment of the present invention, two reinforcing side panels 320 are provided, and the two reinforcing side panels 320 are provided on both sides of the reinforcing bottom plate 310. In this way, the two reinforcing side panels 320 can form a more stable frame structure together with the reinforcing bottom plate 310 and the reinforcing beam 200, effectively improving the bending moment and torsion resistance of the overall structure, making the structure of the battery pack more durable and not easy to deform or crack.

[0049] In one embodiment of the utility model, the two reinforcing side plates 320 extend in a direction away from each other at one end away from the reinforcing bottom plate 310. In this way, after the reinforcing side plates 320 and the reinforcing bottom plate 310 are assembled in the reinforcing cavity of the reinforcing beam 200, the distance between the end of the reinforcing side plate 320 close to the reinforcing bottom plate 310 and the side of the reinforcing cavity is large, which facilitates welding of the reinforcing side plates 320 and the reinforcing beam 200, thereby improving welding efficiency.

[0050] In one embodiment of the present invention, referring to Figure 3 and Figure 4 The reinforcement body 300 also includes a reinforcement base 330 . A mounting position is provided on the reinforcement beam 200 . The reinforcement base 330 is arranged corresponding to the mounting position. The reinforcement base 330 connects the reinforcement beam 200 and the reinforcement side plate 320 .

[0051] In the actual application of the battery pack, mounting positions such as mounting holes are usually set on the reinforcing beam 200 to facilitate connection and fixation with other components. The reinforcing beam 200 has greater strength near the mounting position and is prone to cracking when subjected to greater force. For this reason, a reinforcing base 330 is provided in one embodiment of the present application. The reinforcing base 330 is provided corresponding to the mounting position, thereby increasing the structural strength of the reinforcing beam 200 near the mounting position and preventing cracking in the mounting position area. As an optional method, the reinforcing base 330 is disposed in the reinforcing cavity and is connected to the reinforcing side plate 320. The reinforcing base 330 abuts against the inner surface of the reinforcing beam 200.

[0052] In one embodiment of the present invention, referring to Figure 5 The reinforcing base 330 includes a base plate 331 and a nut seat 332 disposed on the base plate 331 . The base plate 331 connects the reinforcing beam 200 and the reinforcing side plate 320 , and the nut seat 332 faces the opening.

[0053] Specifically, the reinforcing base 330 includes a base plate 331 and a nut seat 332, wherein the base plate 331 abuts against the inner surface of the reinforcing beam 200 and is connected to the reinforcing side plate 320, and the nut seat 332 is arranged on the side of the base plate 331 facing the reinforcing bottom plate 310 and is connected to the base plate 331. The surface area of ​​the nut seat 332 is smaller than the surface area of ​​the base plate 331, so that the overall weight of the reinforcing base 330 is reduced on the basis of ensuring the connection strength between the reinforcing base 330 and the reinforcing beam 200. As an optional method, the base plate 331 and the inner surface of the reinforcing beam 200 are spot welded. It can be understood that the reinforcing base 330 and the reinforcing beam 200 are fixed by welding. Of course, the reinforcing base 330 and the reinforcing side plate 320 can also be fixed by welding, which is not limited here.

[0054] In one embodiment, the reinforcing side plate 320 is provided with two pieces, referring to Figure 3Each reinforced side plate 320 is provided with a corresponding reinforced base 330; Figure 4 Alternatively, two reinforced side panels 320 may correspond to the same reinforced base 330, which is not limited here.

[0055] In one embodiment of the utility model, a relief notch for escaping the nut seat 332 is provided on the reinforcing side plate 320. In this way, a relief space can be provided for the nut seat 332, so that the nut seat 332 can extend toward the reinforcing bottom plate 310.

[0056] In one embodiment of the utility model, the reinforcing beam 200 and the box body 100 are bonded by an adhesive. The interior of the reinforcing beam 200 is a hollow structure, and the adhesive can be filled in at least part of the position in the reinforcing cavity, and the reinforcing beam 200 and the box body 100 are bonded and fixed together by the adhesive, which is simple and convenient to operate and has high reliability.

[0057] In one embodiment of the present invention, referring to Figure 1 , Figure 3 as well as Figure 4 The battery pack further includes a reinforcing support 400, which is disposed on the side of the reinforcing beam 200 facing the installation opening and connects the reinforcing beam 200 and the box body 100, so that the connection strength between the reinforcing beam 200 and the side of the box body 100 can be improved, and can withstand a large collision force to prevent cracking;

[0058] and / or, refer to Figure 1 and Figure 6 , a flange 500 is provided at one end of the reinforcing beam 200 close to the opening, the flange 500 extends away from the opening, and the flange 500 abuts against the bottom surface of the box body 100, thereby increasing the contact area between the reinforcing beam 200 and the box body 100, and improving the connection reliability between the reinforcing beam 200 and the box body 100. As an optional method, the flange 500 and the box body 100 can be fixed by welding or bonding, which is not limited here;

[0059] And / or, the box body 100 is formed by stamping or bending a sheet metal, so that it can adapt to the design changes of different battery cells, has high flexibility, and effectively reduces the production cost.

[0060] To achieve the above purpose, the embodiment of the utility model provides a vehicle, which includes the battery pack described above. Specifically, the specific structure of the battery pack refers to the above embodiment. Since the vehicle adopts all the technical solutions of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0061] The above description is only an exemplary implementation of the present invention, and does not limit the patent scope of the embodiments of the present invention. All equivalent structural changes made by using the description and drawings of the embodiments of the present invention under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the embodiments of the present invention.

Claims

1. A battery pack, characterized in that: The battery pack comprises: A box body, wherein the box body forms a mounting cavity having a mounting opening; a reinforcing beam disposed in the installation cavity, the reinforcing beam forming a reinforcing cavity having an opening, the opening facing away from the installation opening; and A reinforcing body is arranged in the reinforcing cavity. A plurality of reinforcing bodies are arranged at intervals along the length direction of the reinforcing beam. The reinforcing body includes a reinforcing bottom plate and a reinforcing side plate connected to the reinforcing bottom plate. The reinforcing bottom plate is connected to the bottom surface of the mounting cavity, and the reinforcing side plate is connected to the side surface of the reinforcing cavity.

2. The battery pack according to claim 1, characterized in that: The reinforced side plates are provided with two pieces, and the two reinforced side plates are arranged on both sides of the reinforced bottom plate.

3. The battery pack according to claim 2, characterized in that: One end of the two reinforcing side plates away from the reinforcing bottom plate extends in directions away from each other.

4. The battery pack according to claim 1, wherein: The reinforcement body also includes a reinforcement base. A mounting position is provided on the reinforcement beam. The reinforcement base is arranged corresponding to the mounting position. The reinforcement base connects the reinforcement beam and the reinforcement side plate.

5. The battery pack according to claim 4, characterized in that: The reinforcing base includes a base plate and a nut seat arranged on the base plate, the base plate connects the reinforcing beam and the reinforcing side plate, and the nut seat faces the opening.

6. The battery pack according to claim 5, characterized in that: The reinforcing side plate is provided with an escape notch for escaping the nut seat.

7. The battery pack according to any one of claims 4 to 6, characterized in that: The reinforcing base and the reinforcing beam are welded; and / or, the reinforcing base and the reinforcing side plate are welded; and / or, the reinforcing bottom plate and the box body are welded; and / or, the reinforcing beam and the box body are bonded by an adhesive.

8. The battery pack according to claim 1, wherein: The reinforcement body is arranged close to the end of the reinforcement beam; And / or, the battery pack further comprises a reinforcing support, which is arranged on a side of the reinforcing beam facing the mounting opening and connects the reinforcing beam and the box body; And / or, the reinforcing beam is provided with a flange at one end close to the opening, the flange extends away from the opening, and the flange abuts against the bottom surface of the box body; And / or, the box body is formed by stamping or bending sheet metal.

9. A vehicle, characterized in that: The vehicle comprises the battery pack according to any one of claims 1 to 8.

Images