Battery pack mounting point structure, battery pack and vehicle

Abstract

This utility model relates to the field of battery pack technology, specifically to a battery pack mounting point structure, a battery pack, and a vehicle. It includes: a connecting assembly for connecting to the battery pack crossbeam and the vehicle mounting surface, comprising a sleeve, a reinforcing bracket, a connecting bolt, and a mounting nut; the sleeve has internal and external threads, the internal thread engaging with the connecting bolt, and the external thread engaging with the mounting nut; the reinforcing bracket is connected to the sleeve, and the reinforcing bracket has a welded portion for welding to the battery pack crossbeam; and a sealing element disposed between the sleeve and the battery pack cover. This utility model possesses excellent durability and safety performance, and also features a simple structure and strong manufacturing feasibility.

Description

Technical Field

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

[0002] With the rapid development of the new energy vehicle industry and its widespread adoption in the global market, the safety and overall performance of battery packs, as core components of new energy vehicles, are receiving increasing attention. The central mounting point of the battery pack not only undertakes the crucial task of securely fixing the battery pack to the vehicle chassis, but also effectively improves the rigidity and modal characteristics of the battery pack cover by supporting it, thereby significantly impacting the overall NVH (noise, vibration, and harshness) performance, durability, and safety performance of the vehicle.

[0003] However, the design of the central mounting point in traditional battery packs has many shortcomings. On the one hand, these designs are often structurally complex, requiring numerous components and sophisticated assembly processes, resulting in large space occupation and numerous sealing areas, which not only increases manufacturing costs but also raises production difficulty. On the other hand, although some existing technologies attempt to simplify the structure through non-through designs, they still rely on fasteners such as blind rivets, making the structure less than optimal. Furthermore, during vehicle operation, the connection between the central mounting point and the crossbeam is prone to stress concentration due to dynamic loads, leading to cracking and structural failure of the mounting point, seriously threatening the safety and reliability of the battery pack.

[0004] Therefore, it is necessary to develop a new battery pack mounting point structure, battery pack, and vehicle. Utility Model Content

[0005] The purpose of this utility model is to provide a battery pack mounting point structure, a battery pack, and a vehicle that not only have excellent durability and safety performance, but also have a simple structure and strong manufacturing feasibility.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] Firstly, the battery pack mounting point structure of this utility model includes:

[0008] Connection components for connecting to the battery pack crossbeam and vehicle mounting surface, including sleeves, reinforcing brackets, connecting bolts, and mounting nuts;

[0009] The sleeve is provided with internal threads and external threads. The internal threads are connected to the connecting bolts, and the external threads are connected to the mounting nuts.

[0010] The reinforcing bracket is connected to the sleeve, and the reinforcing bracket is provided with a welding part that is welded to the crossbeam of the battery pack;

[0011] A seal is provided between the sleeve and the battery pack cover.

[0012] Preferably, the sleeve has a circumferential step in the middle, and the sealing element includes a sealing element disposed on the circumferential step, which is in sealing fit with the lower surface of the battery pack cover. By providing a circumferential step and a sealing element in the middle of the sleeve, a sealing fit is formed with the lower surface of the battery pack cover, effectively preventing water, dust and other impurities from entering the battery pack, improving the protection level of the battery pack, and ensuring the safety and reliability of the battery module in harsh environments.

[0013] Preferably, a first annular groove is formed on the circumferential step, the seal is embedded in the first annular groove, and at least a portion of the seal protrudes outside the first annular groove. This enhances the stability of the seal installation.

[0014] Preferably, the battery pack cover has a second annular groove, the seal is embedded in the second annular groove, and at least a portion of the seal protrudes outside the second annular groove. This enhances the stability of the seal installation.

[0015] Preferably, the reinforcing bracket has a U-shaped structure, including a bottom surface, a top surface, and two side surfaces; both the bottom and top surfaces of the reinforcing bracket are welded to the sleeve, and the welded portions are provided at both ends of the bottom surface. This structure has good rigidity and torsional resistance, disperses battery pack vibration or impact loads, avoids breakage at the connection between the sleeve and the reinforcing bracket, and improves the durability of the mounting point.

[0016] Preferably, the sealing element is a sealing foam ring or a rubber sealing ring. Using a sealing foam ring or a rubber sealing ring as the sealing element balances elasticity and corrosion resistance.

[0017] Preferably, the battery pack mounting point structure is a mounting point structure in the middle of the battery pack. This clarifies that the battery pack mounting point structure is a middle mounting point.

[0018] Secondly, the battery pack of the present invention includes a battery module, a battery pack cover and at least one battery pack crossbeam, characterized in that it further includes at least one battery pack mounting point structure as described in the present invention.

[0019] The reinforcing bracket is welded to the upper end face of the battery pack crossbeam via a welding section;

[0020] The battery pack cover is provided with a first mounting hole, and the upper end of the sleeve passes through the first mounting hole and is connected to the mounting nut through an external thread;

[0021] The connecting bolt passes through the second mounting hole on the vehicle mounting surface and is connected to the internal thread of the sleeve.

[0022] Preferably, the battery pack crossbeam comprises a first layer, a second layer, and a third layer from top to bottom. The bottom surface of the reinforcing bracket has welding portions at both ends, and the bottom surface of the reinforcing bracket is welded to the first layer via two welding portions. A battery heating film is located below the third layer. Placing the battery heating film in the space below the third layer of the battery pack crossbeam improves the space utilization of the battery pack housing, while also achieving weight reduction and lower manufacturing costs.

[0023] Thirdly, the vehicle described in this utility model includes a vehicle body and a battery pack as described in this utility model, the battery pack being mounted on the vehicle body.

[0024] This utility model has the following beneficial effects:

[0025] (1) This utility model reduces the number of parts (such as eliminating the core-pulling rivet) by integrating the sleeve and the reinforcing bracket, simplifying the assembly process and reducing manufacturing costs.

[0026] (2) The battery pack mounting point structure described in this utility model only utilizes the space above the battery pack crossbeam and below the battery pack cover. The battery pack mounting point does not penetrate the battery pack crossbeam, bottom guard plate and cold plate, saving the internal space of the battery pack, providing conditions for the integration of battery heating film and other components, and improving space utilization.

[0027] (3) Compared with the traditional central mounting point, the present invention only has a sealing area between the battery pack cover and the circumferential step of the sleeve, so the sealing area is small, which reduces the manufacturing cost and production difficulty.

[0028] (4) The reinforcing bracket in this utility model is U-shaped, and the top and bottom surfaces of the reinforcing bracket are welded to the sleeve. At the same time, the two ends of the bottom surface of the reinforcing bracket are fixed to the first layer of the battery pack beam through the welding part. This structure has good rigidity and torsional resistance, which can disperse the vibration or impact load of the battery pack, effectively avoid the breakage at the connection between the sleeve and the reinforcing bracket, and improve the durability of the mounting point.

[0029] (5) The space saved by the non-through mounting point design of this utility model is used for the layout of the battery pack heating film, which avoids interference between the battery pack heating film and the mounting point structure and improves the integration of the thermal management system.

[0030] (6) The battery pack mounting point structure described in this utility model also supports the battery pack cover by installing nuts, which effectively improves the rigidity and modality of the battery pack cover, thereby significantly affecting the NVH performance, durability and safety performance of the whole vehicle. Attached Figure Description

[0031] Figure 1This is a schematic diagram of the power battery mounting point structure described in the embodiments of this application (excluding connecting bolts and mounting nuts);

[0032] Figure 2 This is a schematic diagram of the power battery mounting point structure set on the crossbeam of the housing as described in the embodiments of this application (excluding connecting bolts and mounting nuts);

[0033] Figure 3 This is a schematic diagram of the overall structure of the power battery mounting point structure in the battery pack in the embodiments of this application;

[0034] Figure 4 This is a schematic diagram of the vehicle structure in an embodiment of this application;

[0035] In the diagram: 1. Sleeve, 1a. Circumferential step, 2. Seal, 3. Reinforcing bracket, 3a. Top surface, 3b. Side surface, 3c. Bottom surface, 4. Battery pack crossbeam, 4a. First layer, 4b. Second layer, 4c. Third layer, 5. Battery heating film, 6. Vehicle mounting surface, 6a. Second mounting hole, 7. Mounting nut, 8. Battery pack top cover, 8a. First mounting hole, 9. Connecting bolt, 10. Vehicle body, 11. Battery pack. Detailed Implementation

[0036] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the invention. It should be understood that the preferred embodiments are only for illustrating the invention and not for limiting the scope of protection of this utility model.

[0037] In the embodiments of this application, in order to clearly describe the technical solutions of the embodiments of this application, the terms "first" and "second" are used to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different. The technical features described by "first" and "second" have no sequential or size order.

[0038] In the embodiments of this application, at least one can also be described as one or more, and multiple can be two, three, four or more, and this application does not impose any restrictions.

[0039] like Figure 1 and Figure 2As shown in this embodiment, a battery pack mounting point structure includes a connecting assembly and a sealing element 2. The connecting assembly is used to connect with the battery pack crossbeam 4 and the vehicle mounting surface 6. The connecting assembly includes a sleeve 1, a reinforcing bracket 3, a connecting bolt 9, and a mounting nut 7. The sleeve 1 has internal and external threads. The internal thread mates with the connecting bolt 9, and the external thread mates with the mounting nut 7. The reinforcing bracket 3 is welded to the sleeve 1, and the reinforcing bracket 3 has a welded portion that is welded to the battery pack crossbeam 4. The sealing element 2 is disposed between the sleeve 1 and the battery pack cover 8.

[0040] like Figure 3 As shown, in one possible embodiment, the sleeve 1 has a circumferential step 1a in the middle, and the seal 2 is disposed on the circumferential step 1a, with the seal 2 sealingly engaging with the lower surface of the battery pack cover 8. By providing the circumferential step 1a and the seal 2 in the middle of the sleeve 1, a sealing engagement is formed with the lower surface of the battery pack cover 8, effectively preventing water, dust, and other impurities from entering the battery pack, improving the protection level of the battery pack, and ensuring the safety and reliability of the battery module (not shown in the figure) in harsh environments.

[0041] In one possible embodiment, a first annular groove (not shown in the figure) is formed on the circumferential step 1a, and the seal 2 is embedded in the first annular groove, with at least a portion of the seal 2 protruding outside the first annular groove. This enhances the stability of the seal 2 installation, further improves the sealing effect, and reduces the risk of seal failure due to vibration or temperature changes.

[0042] In one possible embodiment, a second annular groove (not shown in the figure) is formed on the battery pack cover 8, and the seal 2 is embedded in the second annular groove, with at least a portion of the seal 2 protruding outside the second annular groove. This enhances the stability of the seal 2 installation, further improves the sealing effect, and reduces the risk of seal failure due to vibration or temperature changes.

[0043] like Figure 1 As shown, in one possible embodiment, the reinforcing bracket 3 has a U-shaped structure, including a bottom surface 3c, a top surface 3a, and two side surfaces 3b. Both the bottom surface 3c and the top surface 3a of the reinforcing bracket 3 are welded to the sleeve 1, and both ends of the bottom surface 3c are provided with welded portions. This reinforcing bracket 3 has good rigidity and torsional resistance, can disperse battery pack vibration or impact loads, effectively avoids breakage at the connection between the sleeve 1 and the reinforcing bracket 3, and improves the durability of the mounting point.

[0044] In one possible embodiment, the seal 2 is a sealing foam ring or a rubber sealing ring. Using a sealing foam ring or a rubber sealing ring for the seal 2 provides both elasticity and corrosion resistance.

[0045] like Figure 2As shown, in one possible embodiment, the battery pack mounting point structure is a mounting point structure in the middle of the battery pack.

[0046] like Figure 3 As shown in the embodiment of this application, a battery pack includes a battery module, a battery pack cover 8, and at least one battery pack crossbeam 4, and also includes at least one battery pack mounting point structure as described in this embodiment. A reinforcing bracket 3 is welded to the upper surface of the battery pack crossbeam 4 via a welding portion. The battery pack cover 8 has a first mounting hole 8a, through which the upper end of the sleeve 1 passes and is connected to the mounting nut 7 via an external thread. A connecting bolt 9 passes through a second mounting hole 6a on the vehicle mounting surface 6 and is connected to the internal thread of the sleeve 1. The reinforcing bracket 3 is generally U-shaped, and is welded to the battery pack crossbeam 4 via a welding portion on its bottom surface 3c, distributing the stress on the sleeve 1 to the battery pack crossbeam 4, thus preventing cracking due to stress concentration at the connection between the battery pack mounting point structure and the battery pack crossbeam 4. In addition, the battery pack mounting point structure also supports the battery pack cover 8 through the installation nut 7, which effectively improves the rigidity and modal characteristics of the battery pack cover 8, thereby significantly affecting the NVH performance, durability and safety performance of the whole vehicle.

[0047] like Figure 3 As shown, in one possible embodiment, the battery pack crossbeam 4 includes a first layer 4a, a second layer 4b, and a third layer 4c from top to bottom. The bottom surface 3c of the reinforcing bracket 3 has welding portions at both ends, and the bottom surface 3c of the reinforcing bracket 3 is welded to the first layer 4a through two welding portions. A battery heating film 5 is located below the third layer 4c. This battery pack mounting point structure utilizes only the space above the battery pack crossbeam 4 and below the battery pack cover 8. That is, the battery pack mounting point does not penetrate the battery pack crossbeam 4, nor the bottom protective plate (not shown) and cold plate (not shown) located below the battery pack crossbeam 4, thus saving internal space in the battery pack and providing conditions for the integration of the battery heating film 5 and other components, improving space utilization. Simultaneously, arranging the battery heating film 5 in the space below the third layer 4c of the battery pack crossbeam 4 not only improves the space utilization of the battery pack housing but also achieves lightweighting and reduced manufacturing costs.

[0048] like Figure 4 As shown in the embodiments of this application, a vehicle includes a body 10 and a battery pack 11 as shown in the embodiments of this application, the battery pack 11 being mounted on the body 10.

[0049] The vehicle can be, but is not limited to, a pure electric vehicle (PEV / BEV), a hybrid electric vehicle (HEV), a range-extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), or a new energy vehicle.

[0050] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0051] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A battery pack mounting point structure, characterized in that, include: The connecting assembly, used for connecting to the battery pack crossbeam (4) and the vehicle mounting surface (6), includes a sleeve (1), a reinforcing bracket (3), a connecting bolt (9), and a mounting nut (7). The sleeve (1) is provided with internal thread and external thread. The internal thread is connected to the connecting bolt (9), and the external thread is connected to the mounting nut (7). The reinforcing bracket (3) is connected to the sleeve (1), and the reinforcing bracket (3) is provided with a welding part that is welded to the battery pack beam (4); A sealing element (2) is provided between the sleeve (1) and the battery pack cover (8).

2. The battery pack mounting point structure according to claim 1, characterized in that: The sleeve (1) has a circumferential step (1a) in the middle, and the sealing element (2) is disposed on the circumferential step (1a). The sealing element (2) is sealed to the lower surface of the battery pack cover (8).

3. The battery pack mounting point structure according to claim 2, characterized in that: The circumferential step (1a) has a first annular groove, the sealing member (2) is embedded in the first annular groove, and at least a portion of the sealing member (2) protrudes out of the first annular groove.

4. The battery pack mounting point structure according to claim 2, characterized in that: The battery pack cover (8) has a second annular groove, the sealing member (2) is embedded in the second annular groove, and at least a part of the sealing member (2) protrudes out of the second annular groove.

5. The battery pack mounting point structure according to claim 1, characterized in that: The reinforcing bracket (3) has a U-shaped structure, including a bottom surface (3c), a top surface (3a) and two side surfaces (3b); the bottom surface (3c) and the top surface (3a) of the reinforcing bracket (3) are both welded to the sleeve (1), and the welding part is provided at both ends of the bottom surface (3c).

6. The battery pack mounting point structure according to claim 1, characterized in that: The sealing element (2) is a sealing foam ring or a rubber sealing ring.

7. The battery pack mounting point structure according to claim 1, characterized in that: The battery pack mounting point structure is a mounting point structure in the middle of the battery pack.

8. A battery pack, comprising a battery module, a battery pack cover (8), and at least one battery pack crossbeam (4), characterized in that, It also includes at least one battery pack mounting point structure as described in any one of claims 1 to 7; The reinforcing bracket (3) is welded to the upper end face of the battery pack beam (4) via a welding part; The battery pack cover (8) is provided with a first mounting hole (8a), and the upper end of the sleeve (1) passes through the first mounting hole (8a) and is connected to the mounting nut (7) by external thread; The connecting bolt (9) passes through the second mounting hole (6a) of the vehicle mounting surface (6) and is connected to the internal thread of the sleeve (1).

9. The battery pack according to claim 8, characterized in that: The battery pack crossbeam (4) includes a first layer (4a), a second layer (4b) and a third layer (4c) from top to bottom. The bottom surface (3c) of the reinforcing bracket (3) is provided with welding parts at both ends. The bottom surface (3c) of the reinforcing bracket (3) is welded to the first layer (4a) through two welding parts respectively. A battery heating film (5) is provided below the third layer (4c).

10. A vehicle, comprising a body (10), characterized in that, It also includes a battery pack (11) as described in claim 8 or 9, the battery pack (11) being mounted on the vehicle body (10).

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