Battery pack assembly and vehicle

Abstract

The invention provides a battery pack assembly and a vehicle. According to one embodiment of the invention, the battery pack assembly comprises a shell with an accommodating cavity; the partition plate is located in the containing cavity and divides the containing cavity into a battery bin and a smoke discharging bin, and the partition plate is provided with a smoke discharging opening communicated with the smoke discharging bin; the battery cell is arranged in the battery compartment, and the battery cell is provided with an anti-explosion valve; the insulating part is located between the battery cell and the partition plate, the insulating part is provided with an open hole, and the open hole is communicated with the anti-explosion valve and the smoke outlet; wherein the partition plate is fixedly connected with the insulating part through an adhesive, and is fixedly connected with the battery cell through the insulating part. The scheme can meet the insulation requirement of the battery cell and the partition plate as much as possible.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery pack, in particular to a battery pack assembly and a vehicle. BACKGROUND

[0002] In the related art, in order to ensure the safety of the battery, the battery pack shell is divided into a smoke exhaust chamber and a battery chamber by a partition plate. The smoke exhaust chamber is used for discharging smoke and other high-temperature splashes sprayed by the explosion-proof valve of the battery cell. The battery chamber is used for accommodating the battery cell and the electrical connector. The partition plate and the battery cell are fixedly connected by an adhesive such as structural adhesive. However, when the thickness of the adhesive is insufficient, the battery cell and the partition plate cannot be insulated, which affects the normal operation of the battery cell. SUMMARY

[0003] The present application provides a battery pack assembly and a vehicle, which can meet the insulation requirements of the battery cell and the partition plate as much as possible.

[0004] In a first aspect, the present application provides a battery pack assembly, comprising:

[0005] a shell having a receiving cavity;

[0006] a partition plate located in the receiving cavity and dividing the receiving cavity into a battery chamber and a smoke exhaust chamber, the partition plate being provided with a smoke exhaust opening communicating with the smoke exhaust chamber;

[0007] a battery cell provided in the battery chamber, the battery cell having an explosion-proof valve;

[0008] an insulating member located between the battery cell and the partition plate, the insulating member being provided with an opening, the opening communicating the explosion-proof valve and the smoke exhaust opening;

[0009] wherein the partition plate is fixedly connected with the insulating member by an adhesive, and the insulating member is fixedly connected with the battery cell.

[0010] Optionally, the insulating member is further provided with a through hole for the adhesive to pass through, and the partition plate is bonded with the battery cell by the adhesive passing through the through hole.

[0011] Optionally, the insulating member includes a first surface facing the battery cell, and the first surface is provided with a back adhesive layer, and the insulating member is bonded with the battery cell by the back adhesive layer.

[0012] Optionally, the insulating member includes a second surface facing the partition plate and a protruding portion provided on the second surface, and the protruding portion protrudes from the second surface.

[0013] Optionally, the protruding portion is in the shape of a protruding strip or a protruding column.

[0014] Optionally, the number of the protruding portions is plural.

[0015] Optionally, the height of the protrusion is in a range from 0.1 mm to 4 mm.

[0016] Optionally, the insulating member further comprises a first glue blocking structure arranged at the outer periphery of the opening, the first glue blocking structure extending along the circumferential direction of the opening and extending towards the partition plate.

[0017] Optionally, the first glue blocking structure further extends inwards along the radial direction of the opening, so that the radial dimension of the opening is smaller than the radial dimension of the smoke exhaust port.

[0018] Optionally, the edge of the insulating member is provided with a second glue blocking structure, the second glue blocking structure extending towards the partition plate and extending along the circumferential direction of the insulating member.

[0019] Optionally, the number of the battery cells is a plurality, the plurality of battery cells are arranged side by side, and there is a joint seam between two adjacent battery cells, and the insulating member is further provided with a positioning portion on the side facing the battery cells, the positioning portion being inserted into the joint seam.

[0020] In a second aspect, the present application provides a vehicle, comprising:

[0021] The battery pack assembly according to any one of the preceding aspects.

[0022] The battery pack assembly and the vehicle provided by the present application have at least the following advantages:

[0023] The insulating member is directly arranged between the partition plate and the battery cell, forming a rigid insulating barrier, even if the thickness of the adhesive is insufficient, the insulating member can prevent the partition plate from directly contacting the battery cell, and the insulation of the partition plate and the battery cell is ensured from the physical level. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 FIG. 1 is a schematic diagram of the overall structure of a battery pack assembly according to an embodiment;

[0025] Figure 2 FIG. 2 is a partial schematic diagram of the battery pack assembly according to an embodiment;

[0026] Figure 3 FIG. 3 is a partial schematic diagram of the battery pack assembly according to another embodiment;

[0027] Figure 4 FIG. 4 is a schematic diagram of the structure of an insulating member according to an embodiment;

[0028] Figure 5 FIG. 5 is a schematic diagram of the structure of the insulating member according to another embodiment;

[0029] Figure 6 FIG. 6 is a partial schematic diagram of the insulating member according to another embodiment;

[0030] Figure 7 FIG. 4 is a partial schematic view of an insulating piece shown in an embodiment;

[0031] Figure 8 FIG. 5 is a partial schematic view of the insulating piece shown in another view in an embodiment.

[0032] FIG. 1 is a schematic view of a battery pack assembly in an embodiment; FIG. 2 is a schematic view of a battery pack assembly in an embodiment; FIG. 3 is a schematic view of a battery pack assembly in an embodiment; FIG. 4 is a partial schematic view of an insulating piece shown in an embodiment; FIG. 5 is a partial schematic view of the insulating piece shown in another view in an embodiment. DETAILED DESCRIPTION

[0033] The exemplary embodiments will be described in detail herein below with reference to the accompanying drawings. In the following description, unless otherwise indicated, the same reference numerals in different drawings denote the same or similar components. The embodiments described in the following exemplary embodiments are not representative of all embodiments under the present application, but rather, they are merely examples of some devices and methods under the present application.

[0034] The terms used in the present application are merely for the purpose of describing particular embodiments and are not intended to limit the present application. Unless otherwise defined, technical terms or scientific terms used in the present application should be understood as having the same meaning as those commonly understood by one of ordinary skill in the art to which the present application belongs. The terms "first", "second", and the like used in the present application do not denote any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "one" or "a" or the like do not denote a quantity restriction, but rather, denote the existence of at least one, unless otherwise indicated. "Multiple" or "several" means two or more. Unless otherwise indicated, "front", "rear", "lower", and / or "upper", "top", "bottom", and the like, are used for ease of description and are not intended to be limiting to one position or spatial orientation. The terms "include" or "contain" or the like mean that the elements or objects appearing before "include" or "contain" cover the elements or objects listed after "include" or "contain" and their equivalent elements or objects, and do not exclude other elements or objects. The terms "connected" or "coupled" or the like are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0035] The present application provides a battery pack assembly and a vehicle. The battery pack assembly will be described in detail below with reference to the accompanying drawings. In the case of no conflict, the features in the following embodiments and implementation manners can be combined with each other.

[0036] Please refer to Figures 1 to 3 In a first aspect, the application provides a battery pack assembly, which comprises a shell 10, a partition plate 20, a battery cell 30 and an insulating piece 40. Figures 1 to 3 In the figure, X is the width direction of the battery cell 30, Y is the length direction of the battery cell 30, and Z is the height direction of the battery cell 30 (from the bottom of the battery cell 30 to the top of the battery cell 30). In particular, when the battery pack assembly is assembled on a vehicle, the above-mentioned X direction is generally the length direction of the vehicle, the Y direction is generally the width direction of the vehicle, and the Z direction is generally the height direction of the vehicle. The following can be referred to the explanation, so this will not be described again.

[0037] The shell 10 is the basic support structure of the battery pack assembly, which is used to protect the internal battery cell 30 and other components. At the same time, the shell 10 can also be used as a connecting structure of the battery pack assembly, which is connected with the body of the vehicle to realize the installation of the battery pack assembly, but is not limited to.

[0038] The shell 10 has a receiving cavity, and the partition plate 20 is located in the receiving cavity and is fixedly connected with the shell 10. The connection mode includes but is not limited to bolt connection, clamping, bonding, welding and the like. The partition plate 20 can divide the receiving cavity into a battery compartment 11 and a smoke exhaust compartment 12, and the partition plate 20 is provided with a smoke exhaust port 21 communicating with the smoke exhaust compartment 12. In the case that the battery compartment 11 is not installed with the battery cell 30, the smoke exhaust port 21 communicates the smoke exhaust compartment 12 and the battery compartment 11. In an embodiment, the shell 10 can include a top cover 13, a tray 14 and a bottom guard plate 15. The top cover 13 is installed at the opening of the tray 14, and the bottom guard plate 15 is installed at the bottom of the tray 14. The partition plate 20 can be fixedly connected with the tray 14, but is not limited to.

[0039] The battery cell 30 is arranged in the battery compartment 11, and the battery cell 30 is provided with an explosion-proof valve 31. The explosion-proof valve 31 can be arranged opposite to the smoke exhaust port 21, but is not limited to. The insulating piece 40 is located between the battery cell 30 and the partition plate 20, and the insulating piece 40 is provided with an opening 41. The opening 41 communicates the explosion-proof valve 31 and the smoke exhaust port 21. When the battery cell 30 fails, the explosion-proof valve 31 can be opened. The high-temperature spatter generated by the battery cell 30 can enter the smoke exhaust compartment 12 through the opening 41 and the smoke exhaust port 21, and then be discharged through the outlet of the smoke exhaust compartment 12, so as to avoid affecting other normal battery cells 30 in the battery compartment 11.

[0040] The baffle 20 is fixedly connected with the insulating piece 40 through the adhesive 50 and is fixedly connected with the battery cell 30 through the insulating piece 40. The adhesive 50 herein can include but is not limited to a structural adhesive commonly used in the battery field, and the structural adhesive can be specifically referred to related technologies, which are not limited herein. The insulating piece 40 is made of an insulating material, which includes but is not limited to plastic, ceramic material, mica, polyimide and a composite material of various insulating materials, and the insulating piece 40 can play an insulating role. In addition, the “baffle 20 is fixedly connected with the battery cell 30 through the insulating piece 40” can be that the baffle 20 is bonded with the insulating piece 40 through the adhesive 50, and the insulating piece 40 is fixedly connected (such as bonding) with the battery cell 30, that is, the baffle 20 is indirectly connected with the battery cell 30 through the insulating piece 40, or the insulating piece 40 is provided with a through hole 42, and the baffle 20 is directly fixedly connected with the battery cell 30 through the adhesive 50 passing through the through hole 42.

[0041] As can be known from the above description, the insulating piece 40 is directly arranged between the baffle 20 and the battery cell 30 to form a rigid insulating barrier. Even if the thickness of the adhesive 50 is insufficient, the insulating piece 40 can prevent the baffle 20 from directly contacting the battery cell 30, thereby physically ensuring the insulation of the baffle 20 and the battery cell 30. Moreover, the insulating piece 40 is located between the baffle 20 and the battery cell 30 to form a “sandwich” structure, which can improve the overall anti-vibration and anti-impact capability of the battery pack assembly.

[0042] Please refer to Figure 4 , Figure 8 and combine with Figure 2 In one embodiment, the insulating piece 40 is further provided with a through hole 42 (see Figure 4 and Figure 8 ) for the adhesive 50 to pass through, and the baffle 20 is bonded with the battery cell 30 through the adhesive 50 passing through the through hole 42. That is, the through hole 42 of the insulating piece 40 allows the adhesive 50 to pass through to form a direct connection path of “baffle 20-adhesive 50-battery cell 30”, while retaining the physical isolation effect of the insulating piece 40.

[0043] In this way, after the adhesive 50 passes through the through hole 42, the baffle 20 is directly pasted with the battery cell 30 to provide additional connection force.

[0044] Further, the number of through holes 42 can be multiple to further improve the connection stability of the baffle 20 and the battery cell 30. The multiple through holes 42 can be uniformly distributed on the insulating piece 40, but are not limited thereto. In addition, it should be noted that the number of through holes 42 can be specifically set according to requirements, which are not limited herein.

[0045] Please continue to refer to Figure 4 , Figure 8 and combine with Figure 2In one embodiment, the insulating member 40 includes a first surface 43 facing the battery cell 30. The first surface 43 is provided with an adhesive layer (not shown). The insulating member 40 is bonded to the battery cell 30 via the adhesive layer. The adhesive layer provides stable adhesion, tightly connecting the insulating member 40 to the battery cell 30 and filling the gap between the battery cell 30 and the insulating member 40, preventing the adhesive 50 from flowing through the insulating member 40 and into the explosion-proof valve 31 through the gap, thereby affecting the normal opening of the explosion-proof valve 31.

[0046] Furthermore, when through-holes 42 are present, separator 20 is not only connected to battery cell 30 via insulating member 40, but can also be directly connected to battery cell 30 via adhesive 50 in through-holes 42, thereby improving the connection reliability between separator 20 and battery cell 30. Furthermore, insulating member 40 remains between battery cell 30 and separator 20, preventing direct contact between separator 20 and battery cell 30 and providing insulation.

[0047] Please refer to Figures 5 to 7 and combined Figure 2 In one embodiment, the insulating member 40 further includes a second surface 44 facing the partition 20 and a raised portion 45 disposed on the second surface 44, wherein the raised portion 45 protrudes from the second surface 44. It is easy to understand that the insulating member 40 is connected to the partition 20 via an adhesive 50, i.e., the adhesive 50 is filled between the second surface 44 and the partition 20; the raised portion 45 acts as a physical limiter to ensure that the thickness of the adhesive 50 layer between the partition 20 and the insulating member 40 is uniform and stable, thereby preventing connection failure caused by local insufficient thickness between the insulating member 40 and the partition 20. Furthermore, the raised portion 45 can also act as a "reinforcement rib," increasing the structural strength of the insulating member 40, thereby improving the overall deformation resistance of the insulating member 40.

[0048] Furthermore, the protrusion 45 may be in the form of a convex strip; in other words, the convex strip protrusion 45 refers to a long strip protrusion extending along a specific direction on the second surface 44 of the insulating member 40. The characteristic direction may not be limited, such as the length direction of the insulating member 40 or the width direction of the insulating member 40. Alternatively, Figure 7 As shown, the raised portion 45 may be in the shape of a boss; in other words, the boss-shaped raised portion 45 refers to a three-dimensional columnar structure protruding from the second surface 44 of the insulating member 40. Of course, in other embodiments, the raised portion 45 may also have other shapes, such as a lattice-shaped conical structure, but is not limited thereto.

[0049] Furthermore, the number of raised portions 45 can be multiple, and multiple raised portions 45 can more stably define the thickness of the adhesive 50 located between the separator 20 and the insulating member 40, making the thickness of the adhesive 50 more uniform and stable. The raised portions 45 can also be evenly distributed on the second surface 44 of the insulating member 40.

[0050] In one embodiment, the height of the raised portion 45 is in the range of 0.1 mm to 4 mm. In this way, the thickness of the adhesive 50 can be limited to no less than 0.1 mm to ensure basic bonding strength and insulation requirements. At the same time, the thickness of the adhesive 50 is also limited to no more than 4 mm to avoid excessive waste of materials. It should be noted that the height of the raised portion 45 may also be related to the specific material of the adhesive 50. When the insulation and bonding ability of the adhesive 50 are strong, the height of the raised portion 45 can be appropriately reduced, such as between 0.1 mm and 1 mm. Similarly, when the insulation and bonding ability of the adhesive 50 are weak, the height of the raised portion 45 can be appropriately increased, such as between 1 mm and 4 mm.

[0051] Illustratively, the height of the protrusion 45 may be 0.1 mm, 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, or 4 mm, but is not limited thereto.

[0052] Please refer to Figure 6 Combined with Figure 3 In one embodiment, the insulating member 40 further includes a first glue blocking structure 46 disposed on the periphery of the opening 41 . The first glue blocking structure 46 extends along the circumference of the opening 41 and toward the partition 20 .

[0053] In this way, the first glue blocking structure 46 can form an annular barrier on the periphery of the opening 41. When the adhesive 50 is applied to the insulating part 40 to connect the partition 20 and the insulating part 40, the first glue blocking structure 46 can prevent the adhesive 50 from flowing toward the opening 41, and then prevent the adhesive 50 from flowing toward the explosion-proof valve 31 area, thereby avoiding the adhesive 50 affecting the normal opening of the explosion-proof valve 31.

[0054] like Figure 6 In the illustrated embodiment, the first adhesive blocking structure 46 is in the shape of an annular rib, located at the periphery of the opening 41 and extending toward the partition 20 to block the adhesive 50 from flowing toward the opening 41 .

[0055] Please refer to Figure 7 Combined with Figure 2 Furthermore, the first rubber stop structure 46 extends radially inwardly of the opening 41, thereby reducing the radial dimension of the opening 41 to a smaller dimension than the exhaust port 21. In other words, the first rubber stop structure 46 extends both toward the partition plate 20 and radially along the opening 41, forming a tapered annular retaining wall to reduce the radial dimension of the opening 41.

[0056] In this way, on the one hand, the first glue blocking structure 46 in the form of a neck can better block the adhesive 50 from flowing to the explosion-proof valve 31. On the other hand, when the other battery cells 30 cause the explosion-proof valve 31 to open due to failure, the smoke exhaust chamber 12 will be filled with high-temperature splashes. Since the aperture of the opening 41 in the present solution is small, the high-temperature splashes in the smoke exhaust chamber 12 are less likely to pass through the opening 41 and enter, thereby reducing the backflow of high-temperature splashes and avoiding the influence of high-temperature splashes on the normal battery cells 30.

[0057] Please continue to refer to Figure 7 and in combination with Figure 2 In one embodiment, the edge of the insulating piece 40 is provided with a second glue blocking structure 47, which extends towards the separator 20 and along the circumference of the insulating piece 40.

[0058] In this way, the second glue blocking structure 47 can form a ring-shaped barrier at the edge of the insulating piece 40. When the adhesive 50 is applied to the insulating piece 40 to connect the separator 20 and the insulating piece 40, the second glue blocking structure 47 can block the adhesive 50 from passing over the edge of the insulating piece 40, prevent the adhesive 50 from flowing to other parts of the battery cell 30, and avoid the influence of the adhesive 50 on other areas of the battery cell 30 or the electrical connection structure between the battery cells 30, etc.

[0059] The second glue blocking structure 47 can be in the form of a protruding strip or a protruding plate, etc., so as to facilitate processing and thus facilitate production.

[0060] In one embodiment, the number of battery cells 30 is a plurality, and the plurality of battery cells 30 are arranged side by side, and there is a joint seam 32 between two adjacent battery cells 30. The side of the insulating piece 40 facing the battery cell 30 is also provided with a positioning part 48, i.e., the insulating piece 40 further comprises a positioning part 48 arranged on the first surface 43. The positioning part 48 protrudes from the first surface 43, and the positioning part 48 is inserted into the joint seam 32.

[0061] In this way, when the insulating piece 40 is assembled, only the positioning part 48 of the insulating piece 40 needs to be inserted into the joint seam 32, and the opening 41 of the insulating piece 40 can be in communication with the explosion-proof valve 31 without the need for additional calibration, which can improve the assembly efficiency of the insulating piece 40 and the battery cell 30. Moreover, when the separator 20 is bonded to the battery cell 30 by the adhesive 50 passing through the through hole 42, the positioning part 48 can also block the adhesive 50 from flowing into the joint seam 32, preventing the adhesive 50 from damaging other structures (such as the tab, etc.) of the battery cell 30.

[0062] In some embodiments, the assembly process of the battery cell 30 assembly in the present solution is as follows:

[0063] Step 1: Invert the battery cell 30 on the workbench, at this time the explosion-proof valve 31 of the battery cell 30 faces upwards, i.e., the explosion-proof valve 31 of the battery cell 30 can be visible to the operator for subsequent operations.

[0064] Second step: buckle the insulating disc on the battery cell 30, and make the via hole of the insulating disc correspond to the explosion-proof valve 31. In the above embodiment, when the first surface 43 of the insulating disc is provided with the back adhesive layer, the insulating disc is adhered to the battery cell 30 through the back adhesive layer; when the insulating disc comprises the first adhesive blocking structure 46, the first adhesive blocking structure 46 is located at the outer periphery of the explosion-proof valve 31.

[0065] Third step: apply the adhesive 50 on the insulating disc, and then buckle the separator 20 (or the separator 20 and the tray 14 fixed together) on the insulating disc with the adhesive 50 applied.

[0066] Fourth step: after the adhesive 50 is cured and other components (such as the installation of the bottom guard plate 15, etc.) are installed, turn over the battery pack assembly, so that the battery cell 30 is upright on the workbench.

[0067] In a second aspect, the application also provides a vehicle comprising the battery pack assembly according to any one of the above embodiments or implementation manners.

[0068] The vehicle can be a car, a truck, a van, a sport utility vehicle, or any other type of vehicle with a battery. In one embodiment, the vehicle is a high-voltage traction battery powered electric vehicle (e.g., a battery electric vehicle (BEV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), etc.). In another embodiment, the vehicle is an autonomous vehicle, in which the motorized functions of the vehicle are controlled without direct input from a human driver.

[0069] The above only describes the preferred embodiments of the application and is not intended to limit the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the scope of protection of the application.

Claims

1. A battery pack assembly, characterized in that: include: A housing having a receiving cavity; a partition located in the accommodating chamber, dividing the accommodating chamber into a battery compartment and a smoke exhaust compartment, the partition being provided with a smoke exhaust port communicating with the smoke exhaust compartment; A battery cell is disposed in the battery compartment, and the battery cell has an explosion-proof valve; an insulating member, located between the battery core and the partition, the insulating member being provided with an opening, the opening being connected between the explosion-proof valve and the smoke exhaust port; Wherein, the partition is fixedly connected to the insulating member through an adhesive, and is fixedly connected to the battery core through the insulating member.

2. The battery pack assembly according to claim 1, characterized in that: The insulating member is further provided with a through hole for the adhesive to pass through, and the separator is bonded to the battery core by the adhesive passing through the through hole.

3. The battery pack assembly according to claim 1 or 2, characterized in that: The insulating member includes a first surface facing the battery core, the first surface is provided with a back adhesive layer, and the insulating member is bonded to the battery core via the back adhesive layer.

4. The battery pack assembly according to claim 1, characterized in that: The insulating member includes a second surface facing the partition and a protrusion provided on the second surface, wherein the protrusion protrudes from the second surface.

5. The battery pack assembly according to claim 4, characterized in that: The raised portion is in the shape of a convex strip or a convex platform; And / or, the number of the protrusions is multiple; And / or, the height of the protrusion is in the range of 0.1 mm to 4 mm.

6. The battery pack assembly according to claim 1, characterized in that: The insulating member further includes a first glue-blocking structure disposed on the periphery of the opening, wherein the first glue-blocking structure extends along the circumference of the opening and toward the partition.

7. The battery pack assembly according to claim 6, characterized in that: The first glue-blocking structure further extends radially inwardly of the opening, so that the radial dimension of the opening is smaller than the radial dimension of the smoke exhaust port.

8. The battery pack assembly according to claim 1, wherein: A second glue-blocking structure is provided on the edge of the insulating member. The second glue-blocking structure extends toward the partition and along the circumference of the insulating member.

9. The battery pack assembly according to claim 1, characterized in that: There are multiple battery cells, which are arranged side by side, with a joint seam between two adjacent battery cells. A positioning portion is further provided on a side of the insulating member facing the battery cells, and the positioning portion is inserted into the joint seam.

10. A vehicle, characterized in that: include: A battery pack assembly according to any one of claims 1 to 9.

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