Power battery assembly and automobile

Abstract

The utility model provides a power battery assembly and an automobile, the power battery assembly comprises a power battery, a cross beam assembly, a protection plate and a plurality of bolts, the power battery comprises a bottom plate, the cross beam assembly is connected with the peripheral side of the power battery, the protection plate is arranged on the outer side of the bottom plate, and the bolts are arranged on the cross beam assembly. A plurality of fixing holes are formed in the peripheral side of the protection plate at intervals, and the bolts penetrate through the fixing holes and are in threaded connection with the cross beam assembly. The protection plate is arranged on the outer side of the power battery bottom plate, so that when the bottom of the new energy automobile is collided, the possibility that the power battery bottom plate is collided due to the fact that the protection plate is damaged is small, and the protection effect of the power battery bottom plate is improved.

Description

Technical Field

[0001] This application relates to the technical field of the automotive industry, and specifically relates to a power battery assembly. Background Art

[0002] The bottom plate of a power battery is usually made of high-strength steel. If the bottom plate is exposed to air, it is prone to rust after being knocked, which will reduce the strength and lifespan of the bottom plate of the power battery and also affect the airtightness of the power battery. In related technologies, a PVC (polyvinyl chloride) coating with a thickness of 0.8 mm - 1.3 mm is usually sprayed on the bottom plate of the power battery, and its weight is about 3.1 kg. The PVC coating will wrap the bottom plate of the power battery, thereby reducing the possibility of rust on the battery bottom plate. However, the power battery is installed at the bottom of a new energy vehicle. When the bottom of the new energy vehicle is knocked, the bottom plate of the power battery will be knocked, and the PVC coating at the knocked position is likely to fall off, thereby causing rust on the bottom plate of the power battery. Utility Model Content

[0003] In order to overcome the problems existing in the above-mentioned prior art, the main purpose of this application is to provide a power battery assembly and an automobile that can improve the protection effect of the bottom plate of the power battery.

[0004] To achieve the above purpose, this application specifically adopts the following technical solutions:

[0005] This application provides a power battery assembly, and the power battery assembly includes: [[ID=**20**]] [[ID=**21**]]

[0006] [[ID=**22**]]A power battery, and the power battery includes a bottom plate; [[ID=**23**]] [[ID=**24**]]

[0007] [[ID=**25**]]A crossbeam assembly, and the crossbeam assembly is connected to the periphery of the power battery; [[ID=**26**]] [[ID=**27**]]

[0008] [[ID=**28**]]A protection plate, and the protection plate is arranged on the outer side of the bottom plate, and a plurality of fixing holes are arranged at intervals on the periphery of the protection plate; [[ID=**29**]] [[ID=**30**]]

[0009] [[ID=**31**]]A plurality of bolts, and the plurality of bolts respectively pass through the plurality of fixing holes and are threadedly connected to the crossbeam assembly. [[ID=**32**]] [[ID=**33**]]

[0010] [[ID=**34**]]In some embodiments, the power battery has a first side, a second side, a third side, and a fourth side. The power battery assembly further includes a plug-in component, and the plug-in component is arranged on the fourth side, and the crossbeam assembly is arranged on the first side, the second side, the third side, and the fourth side. [[ID=**35**]] [[ID=**36**]]

[0011] [[ID=**37**]]In some embodiments, the crossbeam assembly includes a plurality of first crossbeams, and the cross-sections of the plurality of first crossbeams are respectively in a "day" - shaped structure, and the plurality of first crossbeams are respectively connected to the first side, the second side, and the third side; [[ID=**38**]]

[0012] The power battery assembly further includes a plurality of nuts, which are respectively mounted on the plurality of first beams, and a plurality of bolts respectively pass through the fixing holes and are threadedly connected to the nuts.

[0013] In some embodiments, the second crossbeam includes a first portion and a second portion, the second portion is connected to the first portion so that the cross section of the second crossbeam is an "L"-shaped structure, and the first portion is connected to the fourth side portion;

[0014] The power battery assembly also includes a plurality of lifting ears, which are respectively connected to the second part. The protective plate includes a fixing portion, which is provided with a plurality of fixing holes. The plurality of bolts respectively pass through the fixing holes and are threadedly connected to the lifting ears.

[0015] In some embodiments, the middle area of ​​the protective plate is connected to the bottom plate by bonding.

[0016] In some embodiments, the protective plate includes a plate body and a plurality of ribs, the plate body is arranged on the outer side of the base plate, and the peripheral side of the plate body is connected to the crossbeam assembly, the ribs are connected to the plate body and are located on the side of the plate body facing the base plate, so that there is a distance between at least part of the plate body and the base plate.

[0017] In some embodiments, the protective plate includes a steel plate layer and a coating layer, wherein the coating layer is coated on an outer surface of the steel plate layer.

[0018] In some embodiments, the protective plate includes a steel plate layer, a first glass fiber layer, a second glass fiber layer and a third glass fiber layer. The first glass fiber layer is arranged on the side of the steel plate layer facing the base plate, the second glass fiber layer is arranged on the side of the steel plate layer facing away from the base plate, and the third glass fiber layer is arranged on the peripheral side of the steel plate layer and is located between the first glass fiber and the second glass fiber.

[0019] In some embodiments, the thickness of the first fiberglass layer is less than the thickness of the second fiberglass layer.

[0020] Correspondingly, the present application also provides a car, which includes a body, wheels and a power battery assembly as described in any of the above embodiments, the wheels are arranged at the bottom of the body, and the power battery is arranged inside the body.

[0021] The power battery assembly of the present application includes a power battery, a crossbeam assembly, a protective plate, and multiple bolts. The power battery includes a base plate. The crossbeam assembly is connected to the periphery of the power battery. The protective plate is disposed on the outside of the base plate, and multiple fixing holes are spaced apart along the periphery of the protective plate. Multiple bolts pass through the multiple fixing holes and are threadedly connected to the crossbeam assembly. Compared to the prior art, the present application provides a protective plate on the outside of the power battery base plate. This reduces the likelihood of the protective plate being damaged and causing the power battery base plate to collide with the bottom of the new energy vehicle, thereby improving the protection of the power battery base plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A partial exploded view of the power battery assembly provided in an embodiment of the present application.

[0023] Figure 2 A three-dimensional view of the protective plate provided in an embodiment of the present application.

[0024] Figure 3 A schematic structural diagram of the base plate in the power battery provided in an embodiment of the present application.

[0025] Figure 4 Schematic diagram of the connection structure between the first crossbeam and the power battery provided in an embodiment of the present application.

[0026] Figure 5 A partially enlarged view of a power battery assembly provided in another embodiment of the present application.

[0027] Figure 6 This is an exploded view of a protective plate provided in another embodiment of the present application.

[0028] Figure ID:

[0029] 1. Power battery; 101. First side; 102. Second side; 103. Third side; 104. Fourth side; 105. First mounting hole; 11. Bottom plate; 111. Avoidance groove; 2. Beam assembly; 21. First beam; 3. Protective plate; 30a. Fixing hole; 30b. Second mounting hole; 31. Plate body; 32. Rib; 33. Steel plate layer; 34. First glass fiber layer; 35. Second glass fiber layer; 36. Third glass fiber layer; 37. Fixing part; 4. Connector; 5. Nut; 6. Lifting ear. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0031] In the description of this application, unless otherwise specified or limited, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "plurality" refers to two or more; the terms "connected" and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0032] In the description of this specification, it should be understood that the directional words such as "upper" and "lower" described in the embodiments of the present application are described from the perspectives shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also indirectly connected to the other element "on" or "under" through an intermediate element.

[0033] Reference Figure 1 As shown, the embodiment of the present application discloses a power battery assembly, which can be installed on the bottom of a new energy vehicle to provide power for the new energy vehicle. The power battery assembly includes a power battery 1, a crossbeam assembly 2 and a protective plate 3. The power battery 1 includes a bottom plate 11 ( Figure 3 The upper shell and the battery body are connected to the bottom plate 11, forming a storage cavity, which contains the battery body. The crossbeam assembly 2 is provided around and connected to the periphery of the power battery 1. The protective plate 3 is provided on the outside of the bottom plate 11, and the periphery of the protective plate 3 is detachably connected to the crossbeam assembly 2.

[0034] In this embodiment, a protective plate 3 is provided on the outer side of the bottom plate 11 of the power battery 1. Therefore, when a collision occurs on the bottom of the new energy vehicle, the possibility of the protective plate 3 being damaged and causing the collision with the bottom plate 11 of the power battery 1 is reduced, which is beneficial to improving the protection effect of the bottom plate 11 of the power battery 1.

[0035] Reference Figure 2 and Figure 3 As shown, the protective plate 3 is provided with multiple fixing holes 30a at intervals around its perimeter, and the base plate 11 of the power battery 1 is provided with multiple escape grooves 111 at intervals around its perimeter. The positions of the escape grooves 111 correspond to the positions of the multiple fixing holes 30a. The power battery assembly also includes multiple bolts, which pass through the multiple fixing holes 30a and threadably engage the crossbeam assembly 2, connecting the protective plate 3 to the crossbeam assembly 2. The escape grooves 111 are used to avoid the bolts connecting the protective plate 3 and the crossbeam assembly 2.

[0036] To enhance the stability of the connection between the protective plate 3 and the power battery 1, the central region of the protective plate 3 is also bonded to the base plate 11, thereby improving the stability of the protective plate 3 after installation on the power battery 1. For example, the central region of the protective plate 3 can be bonded to the base plate 11 of the power battery 1 using 3M adhesive. 3M adhesive is a widely used adhesive manufactured by 3M and includes various forms and types of adhesives, such as tapes, structural adhesives, and sealants.

[0037] Continue to refer to Figure 2 As shown, in this embodiment, the protective plate 3 includes a plate body 31 and a plurality of ribs 32. The plate body 31 is disposed on the outside of the base plate 11, and the circumferential side of the plate body 31 is connected to the crossbeam assembly 2. The ribs 32 are connected to the plate body 31 and are located on the side of the plate body 31 facing the base plate 11, thereby ensuring a gap between at least a portion of the protective plate 3 and the base plate 11. By providing the plurality of ribs 32 on the plate body 31 of the protective plate 3 in this embodiment, the strength of the protective plate 3 is enhanced, while the gap between the protective plate 3 and the base plate 11 of the power battery 1 is increased. This reduces the possibility of deformation of the protective plate 3 and scratching the base plate 11 of the power battery 1 in the event of a collision with the bottom of the new energy vehicle.

[0038] Continue to compare Figure 1 As shown, the power battery 1 has a first side portion 101, a second side portion 102, a third side portion 103, and a fourth side portion 104. The first side portion 101 and the second side portion 102 are disposed opposite each other, and the third side portion 103 and the fourth side portion 104 are disposed opposite each other. The crossbeam assembly 2 is respectively connected to the first side portion 101, the second side portion 102, the third side portion 103, and the fourth side portion 104. The power battery assembly also includes a connector 4, which is disposed on the fourth side portion 104 for connecting to other devices.

[0039] Reference Figure 4As shown, the crossbeam assembly 2 includes a plurality of first crossbeams 21 and second crossbeams (not shown in the figure). The cross-sections of the plurality of first crossbeams 21 are respectively in the shape of a Chinese character 'Ri', so that the interior of the first crossbeam 21 has a cavity, and the plurality of first crossbeams 21 are respectively connected to the first side portion 101, the second side portion 102, and the third side portion 103. The power battery assembly further includes a plurality of nuts 5, and the nuts 5 can be, for example, rivet nuts. The plurality of nuts 5 are respectively installed on the plurality of first crossbeams 21, and a plurality of bolts respectively pass through the fixing holes 30a and are threadedly connected to the respective nuts 5 to fix the protection plate 3 to the box body of the power battery 1. The second crossbeam is connected to the fourth side portion 104, and at least a portion of the second crossbeam corresponding to the position of the plug-in connector 4 is provided in an 'L' shape. The 'L'-shaped second crossbeam includes a first part and a second part connected to each other. The first part of the second crossbeam is connected to the fourth side portion; a plurality of bolts respectively pass through the fixing holes 30a and are threadedly connected to the second part of the second crossbeam. In this embodiment, by setting the cross-section of the first crossbeam 21 in the shape of a Chinese character 'Ri', the bolts for connecting the protection plate 3 and the first crossbeam 21 extend into the cavity inside the first crossbeam 21, which does not affect the airtightness inside the box body of the power battery 1; at the same time, the cross-section of the portion of the second crossbeam corresponding to the position of the plug-in connector 4 is set in an 'L' shape to facilitate the connection between the plug-in connector 4 and the internal battery cells of the power battery 1.

[0040] In this embodiment, the protection plate 3 includes a steel plate layer and a coating layer, and the coating layer is sprayed on the outer surface of the steel plate layer. Among them, the material of the steel plate layer can be a steel plate of model DP780, the thickness of the steel plate layer can be 0.7 mm to 0.9 mm, for example, it can be 0.7 mm, 0.8 mm, 0.9 mm, etc., and the weight of the steel plate layer can be 14 kg to 15 kg, for example, it can be 14 kg, 14.7 kg, 15 kg, etc., so that the protection plate 3 has a strong ability to withstand external impacts. At the same time, the material of the coating layer can be PVC (polyvinyl chloride), the thickness of the coating layer can be 1 mm to 1.2 mm, for example, it can be 1 mm, 1.1 mm, 1.2 mm, etc., and the weight of the coating layer can be 3.0 kg to 3.2 kg, for example, it can be 3.0 kg, 3.1 kg, 3.2 kg, etc., so that the coating layer can reduce the possibility that the surface of the steel plate layer is corroded when exposed to air, which is beneficial to improving the service life of the protection plate 3.

[0041] Continue to refer to Figure 1 As shown, the power battery 1 is provided with a first mounting hole 105, and the protection plate 3 is provided with a second mounting hole 30b, and the position of the second mounting hole 30b is correspondingly set with the first mounting hole 105. When the power battery assembly is installed on an automobile, a long bolt can pass through the first mounting hole 105, the second mounting hole 30b and be connected to the vehicle body, so as to fix the power battery assembly to the vehicle body.

[0042] Based on the above embodiments, the present application also discloses another specific embodiment. The difference between this embodiment and the above embodiments is as follows. Refer to Figure 5 and Figure 6 As shown, in this embodiment, the cross-sections of multiple first crossbeams 21 are set as "day" - shaped structures, and the multiple first crossbeams 21 are respectively connected to the first side portion 101, the second side portion 102, and the third side portion 103. Multiple nuts 5 are respectively installed on the multiple first crossbeams 21, and multiple bolts respectively pass through the fixing holes 30a and are threadedly connected to the respective nuts 5 to fix the protection plate 3 to the battery cell 1 housing. The second crossbeam includes a first part and a second part connected to each other, so that the overall cross-section of the second crossbeam is in an "L" - shaped structure, and the first part of the second crossbeam is connected to the fourth side portion 104. The battery assembly further includes multiple lifting lugs 6, and the multiple lifting lugs 6 are respectively connected to the second part of the second crossbeam by welding. The protection plate 3 includes a fixing portion 37 protruding outward, and the fixing portion 37 is provided with multiple fixing holes 30a. Multiple bolts respectively pass through the fixing holes 30a and are threadedly connected to the respective lifting lugs 6, thereby fixing the protection plate 3 to the battery cell 1 while reducing the possibility of affecting the airtightness of the battery cell 1.

[0043] In this embodiment, the protection plate 3 includes a steel plate layer 33, a first fiberglass layer 34, a second fiberglass layer 35, and a third fiberglass layer 36. The first fiberglass layer 34 is provided on the side of the steel plate layer 33 facing the bottom plate 11 and contacts the bottom plate 11 of the battery cell 1. The second fiberglass layer 35 is provided on the side of the steel plate layer 33 facing away from the bottom plate 11 and facing the ground, and the thickness of the first fiberglass layer 34 is less than the thickness of the second fiberglass layer 35. The third fiberglass layer 36 is provided on the periphery of the steel plate layer 33 and is located between the first fiberglass layer 34 and the second fiberglass layer 35.

[0044] In this embodiment, the first fiberglass layer 34 and the second fiberglass layer 35 can sandwich the steel plate layer 33 between the two fiberglass layers, and the third fiberglass layer 36 surrounds the steel plate layer 33 on all sides. After the three fiberglass layers are laminated, the third fiberglass layer 36 can limit the position of the steel plate layer 33 in the horizontal direction. When a collision occurs at the bottom of a new energy vehicle, the impact on the first fiberglass layer 34 is small, and the small thickness of the first fiberglass layer 34 can reduce the weight of the protection plate 3. The impact on the second fiberglass layer 35 is large, and the large thickness of the second fiberglass layer 35 can reduce the possibility of its damage, which is beneficial to improving the reliability of the protection plate 3.

[0045] The fixing portion 37 of this embodiment is locked with the lifting lug 6 by bolts, so that the three fiberglass layers can clamp the steel plate layer 33 without driving the bolts into the battery cell 1, reducing the probability of airtightness failure problems caused by the position of the bolts due to reasons such as the bottom of the vehicle being bumped.

[0046] The steel plate layer 33 may be made of DP780 steel plate, and may have a thickness of 0.7 mm to 0.9 mm, such as 0.7 mm, 0.8 mm, or 0.9 mm. The steel plate layer 33 may weigh 14.5 kg to 15.5 kg, such as 14.5 kg, 15 kg, or 15.5 kg. The first, second, and third glass fiber layers 34, 35, and 36 may be made of PP (polypropylene). The first glass fiber layer 34 may have a thickness of 0.7 mm to 0.9 mm, such as 0.7 mm, 0.8 mm, or 0.9 mm. The second glass fiber layer 35 may have a thickness of 0.9 mm to 1.1 mm, such as 0.9 mm, 1 mm, or 1.1 mm.

[0047] This embodiment provides three layers of glass fiber layers to wrap the steel plate layer 33, which can reduce the possibility of the steel plate layer 33 being corroded. In addition, the glass fiber layer has good ductility and is not easily damaged when the bottom of the new energy vehicle is bumped. This can improve the protection effect of the bottom plate 11 of the power battery 1 and also increase the service life of the protective plate 3.

[0048] In this embodiment, the edges of the three fiberglass layers in the protective plate 3 are provided with fixing holes 30a, and the bolts can pass through the fixing holes 30a on the three fiberglass layers in turn to connect with the nuts 5 or the lugs 6. After the bolts are tightened, the three fiberglass layers can be clamped, so that the three fiberglass layers wrap the steel plate layer 33, reducing the possibility of rusting of the steel plate.

[0049] Correspondingly, an embodiment of the present application further discloses a car, which includes a body, wheels, and a power battery assembly as described in any of the above embodiments, wherein the wheels are arranged at the bottom of the body, and the power battery assembly is arranged inside the body.

[0050] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A power battery assembly, characterized in that: Comprising: A power battery, the power battery including a bottom plate; A crossbeam assembly, the crossbeam assembly being connected to the peripheral side of the power battery; A protective plate, the protective plate being disposed outside the bottom plate, and a plurality of fixing holes being provided at intervals on the peripheral side of the protective plate; A plurality of bolts, the plurality of bolts respectively passing through the plurality of fixing holes and being threadedly connected to the crossbeam assembly.

2. The power battery assembly according to claim 1, characterized in that: The power battery has a first side, a second side, a third side and a fourth side, the power battery assembly further including a plug-in member, the plug-in member being disposed on the fourth side, and the crossbeam assembly being disposed on the first side, the second side, the third side and the fourth side.

3. The power battery assembly according to claim 2, characterized in that: The crossbeam assembly includes a plurality of first crossbeams, the cross-sections of the plurality of first crossbeams respectively presenting a "day" - shaped structure, and the plurality of first crossbeams being respectively connected to the first side, the second side and the third side; The power battery assembly further includes a plurality of nuts, the plurality of nuts being respectively mounted on the plurality of first crossbeams, and the plurality of bolts respectively passing through the respective fixing holes and being threadedly connected to the respective nuts.

4. The power battery assembly according to claim 3, characterized in that: The crossbeam assembly further includes a second crossbeam, the second crossbeam including a first part and a second part, the second part being connected to the first part, making the cross-section of the second crossbeam present an "L" - shaped structure, and the first part being connected to the fourth side; The power battery assembly further includes a plurality of lifting lugs, the plurality of lifting lugs being respectively connected to the second part, the protective plate including a fixing portion, the fixing portion having the plurality of fixing holes, and the plurality of bolts respectively passing through the respective fixing holes and being threadedly connected to the respective lifting lugs.

5. The power battery assembly according to claim 1, characterized in that: The middle region of the protective plate is connected to the bottom plate by an adhesive means.

6. The power battery assembly according to claim 1, characterized in that: The protective plate includes a plate body and a plurality of ribs, the plate body being disposed outside the bottom plate, and the peripheral side of the plate body being connected to the crossbeam assembly, the ribs being connected to the plate body and located on the side of the plate body facing the bottom plate, so that there is a spacing between at least a part of the plate body and the bottom plate.

7. The power battery assembly according to any one of claims 1 to 6, characterized in that: The protective plate includes a steel plate layer and a coating layer, the coating layer being coated on the outer surface of the steel plate layer.

8. The power battery assembly according to any one of claims 1 to 6, characterized in that: The protective plate includes a steel plate layer, a first fiberglass layer, a second fiberglass layer and a third fiberglass layer, the first fiberglass layer being disposed on the side of the steel plate layer facing the bottom plate, the second fiberglass layer being disposed on the side of the steel plate layer facing away from the bottom plate, and the third fiberglass layer being disposed on the peripheral side of the steel plate layer and located between the first fiberglass and the second fiberglass.

9. The power battery assembly according to claim 8, characterized in that: The thickness of the first fiberglass layer is less than the thickness of the second fiberglass layer.

10. An automobile, characterized in that: Including a vehicle body, wheels and the power battery assembly according to any one of claims 1 to 9, the wheels being disposed at the bottom of the vehicle body, and the power battery assembly being disposed inside the vehicle body.

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