Battery pack

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery pack which comprises a battery box body, a battery pack and a buffer structure, and the box body side wall and the box body bottom wall of the battery box body define an accommodating space; the battery pack is accommodated in the accommodating space and is supported by the box body bottom wall of the battery box body; the buffer structure is arranged between the side wall of the battery box body and the battery pack, and the buffer structure and the battery pack as well as the buffer structure and the inner wall of the battery box body are bonded through colloid. According to the battery pack provided by the utility model, the probability of displacement of the battery pack relative to the battery box body is reduced, so that the risk of open circuit in the battery pack is reduced, and the safety and the reliability of the battery pack are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery pack. BACKGROUND

[0002] The battery pack usually includes a battery box and a battery pack arranged in the battery box, and the battery box is used for protecting the battery pack.

[0003] In the prior art, in order to improve the crashworthiness of the battery pack, a crashproof box is usually arranged between the battery box and the battery pack. When assembling the battery pack, the crashproof box is first fixed to the inner wall of the battery box, and then the battery pack is placed in the battery box. In order to reduce the difficulty of placing the battery pack, a gap is usually reserved between the crashproof box and the battery pack, which causes the crashproof box to be deformed under the impact force and to impact the battery pack, so that the battery pack is subjected to secondary impact, which easily causes the displacement of the battery pack relative to the battery box, and seriously affects the connection between the battery pack and the busbar, resulting in a short circuit in the battery pack, affecting the normal use of the battery pack and the safety and reliability of the battery pack.

[0004] Therefore, there is an urgent need for a battery pack with high reliability and safety. SUMMARY

[0005] The first purpose of the utility model is to provide a battery pack, which reduces the probability of displacement of the battery pack relative to the battery box and improves the safety and reliability of the battery pack.

[0006] According to the above idea, the technical scheme adopted by the utility model is as follows:

[0007] The utility model provides a battery pack, which comprises:

[0008] A battery box, wherein the side wall and the bottom wall of the battery box form a containing space;

[0009] A battery pack, wherein the battery pack is contained in the containing space and is supported by the bottom wall of the battery box.

[0010] A buffer structure is arranged between the side wall of the battery box and the battery pack, and the buffer structure is bonded to the battery pack and the inner wall of the battery box by a colloid.

[0011] The utility model has the following advantages:

[0012] The battery pack provided by the utility model, the buffer structure is arranged between the battery pack and the side wall of the battery box, which can enhance the rigidity and structural strength of the battery box, and can buffer the impact force when the battery pack is impacted, so that the battery pack is not damaged by excessive external force, the battery pack and the buffer structure and the battery box and the buffer structure are bonded by the colloid, so that the battery pack, the battery box and the buffer structure are connected into a whole, the integrity of the battery pack is improved, and the buffer structure will not impact the battery pack again after being impacted, so that the probability of displacement of the battery pack relative to the battery box is reduced, the risk of disconnection of the battery pack is reduced, and the safety and reliability of the battery pack are improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the utility model embodiment, the following will briefly introduce the drawings needed to be used in the description of the utility model embodiment. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the contents of the utility model embodiment and the drawings by those skilled in the art without creative labor.

[0014] Figure 1 It is the structure schematic view of the battery pack provided by the utility model embodiment.

[0015] Figure 2 It is the structure schematic view of the battery pack provided by the utility model Figure 1 It is the enlarged schematic view of A in the utility model embodiment.

[0016] Figure 3 It is the first partial enlarged view of the battery pack provided by the utility model embodiment.

[0017] Figure 4 It is the second partial enlarged view of the battery pack provided by the utility model embodiment.

[0018] Figure 5 It is the first schematic view of the buffer structure, the glue blocking assembly and the glue separating piece provided by the utility model embodiment.

[0019] Figure 6 It is the second schematic view of the buffer structure, the glue blocking assembly and the glue separating piece provided by the utility model embodiment.

[0020] Figure 7 It is the front view of the buffer structure, the glue blocking assembly and the glue separating piece provided by the utility model embodiment.

[0021] Figure 8 It is the partial enlarged view of the sectional view of the battery pack provided by the utility model embodiment.

[0022] In the drawing:

[0023] 100, battery box; 110, box side wall; 120, box bottom wall;

[0024] 200, battery pack;

[0025] 300, buffer structure; 310, box body; 320, buffer rib; 321, buffer cavity; 330, first top surface; 340, shallow groove;

[0026] 400, glue body;

[0027] 500, glue blocking assembly; 510, glue blocking block; 520, glue pouring cavity;

[0028] 600, glue isolation piece; 610, second top surface;

[0029] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0030] In order to make the technical problems solved by the utility model, the technical scheme adopted and the technical effects reached more clear, the technical scheme of the utility model will be further explained below in combination with the drawings and through specific embodiments. It can be understood that the specific embodiments described here are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the parts related to the utility model are shown in the drawings, not all.

[0031] It should be noted that: similar labels and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0032] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0034] In the description of this embodiment, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., are based on the orientation or positional relationships shown in the accompanying drawings and are only for ease of description and simplification of operation. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are merely used for distinction in description and have no special meaning.

[0035] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or it can be located in between the component.

[0036] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0037] This embodiment provides a battery pack with high reliability and safety.

[0038] like Figures 1 to 8 As shown, the battery pack includes a battery housing 100, a battery pack 200, a buffer structure 300, and a gel 400. The battery pack, buffer structure 300, and gel 400 are all housed within the battery housing 100. The battery housing 100 has side walls 110 and a bottom wall 120. The side walls 110 and bottom wall 120 enclose a receiving space (not shown in the figure). The battery pack 200 is housed within this receiving space and is supported by the bottom wall 120 of the battery housing 100.

[0039] The buffer structure 300 is arranged between the side wall 110 of the battery box 100 and the battery pack 200. Moreover, the buffer structure 300 and the battery pack 200 and the buffer structure 300 and the inner wall of the battery box 100 are adhered by the adhesive 400, so that the battery box 100, the buffer structure 300 and the battery pack 200 are adhered by the adhesive 400 to form an integral whole, and the overall structural strength of the battery pack is improved.

[0040] It should be noted that the buffer structure 300 and the inner wall of the battery box 100 are adhered by the adhesive 400, which can be that the buffer structure 300 is adhered by the adhesive 400 only with the side wall 110 of the battery box 100; or the buffer structure 300 is adhered by the adhesive 400 with the side wall 110 of the battery box 100 and the bottom wall of the battery box 100, which is not limited in the embodiment.

[0041] It should be further noted that the battery box 100 can be in the shape of a cuboid, and for the convenience of the following description, the length direction of the battery box 100 is referred to as the second direction Y, and the width direction of the battery box 100 is referred to as the first direction X. It can be understood that the battery box 100 can also be square or other three-dimensional shapes, which are not limited in the embodiment.

[0042] The battery box 100 can include a plurality of side walls 110, and in the embodiment, the buffer structure 300 can be arranged between all the side walls 110 and the battery pack 200, or the buffer structure 300 can be arranged between part of the side walls 110 and the battery pack 200, which is not limited in the embodiment.

[0043] In some optional embodiments, the buffer structure 300 is arranged between the characteristic side wall of the battery box 100 and the battery pack 200. The characteristic side wall is the side wall 110 of the battery box 100 whose length direction is the same as the stacking direction of the batteries in the battery pack 200. It should be noted that the battery pack 200 usually includes a plurality of batteries, and the plurality of batteries are arranged in a certain direction. Optionally, Figure 1 The stacking direction of the battery pack 200 is the second direction Y, that is, the buffer structure 300 is arranged on the long side of the battery box 100. Since the middle part of the long side has low rigidity, the buffer structure 300 arranged on the long side makes the whole formed by the buffer structure 300 and the side wall 110 of the long side have high rigidity, thereby achieving the effect of resisting impact and avoiding the impact affecting the performance of the battery pack 200, which has high reliability and safety. It should be further noted that the battery pack can include one or more battery packs 200, and when the battery pack 200 is provided with a plurality of battery packs 200, the plurality of battery packs 200 can be arranged in an array in the accommodating space.

[0044] Further optionally, each of the box side walls 110 arranged opposite in the first direction X is provided with a plurality of buffer structures 300 arranged opposite the battery pack 200, and the plurality of buffer structures 300 are arranged spaced apart along the second direction Y. In this way, the length of the buffer structure 300 can be smaller, thereby having greater rigidity and anti-deformation ability.

[0045] The battery pack provided by the embodiment is provided with the buffer structure 300 between the battery pack 200 and the box side wall 110 of the battery box 100. The buffer structure 300 can enhance the rigidity and structural strength of the battery box 100 on the one hand, and can buffer the impact force when the battery pack is impacted on the other hand, so as to avoid damage of the battery pack 200 due to excessive external force. The battery pack 200 and the buffer structure 300 are bonded by the colloid 400, and the battery box 100 and the buffer structure 300 are bonded by the colloid 400, so as to connect the battery pack 200, the battery box 100 and the buffer structure 300 into an integral whole, thereby improving the integrity of the battery pack. Moreover, the buffer structure 300 will not impact the battery pack 200 again after being impacted, thereby reducing the probability of displacement of the battery pack 200 relative to the battery box 100, reducing the risk of disconnection in the battery pack, and improving the safety and reliability of the battery pack.

[0046] The battery pack can be assembled in various ways. In an implementable manner, when assembling the battery pack provided by the embodiment, the battery pack 200 is first assembled into the battery box 100 and positioned, then the colloid is injected between the box side wall 110 of the battery box 100 and the battery pack 200, and when the height of the colloid meets the requirements, for example, when the height of the colloid reaches 17.5 mm, the buffer structure 300 is placed between the box side wall 110 of the battery box 100 and the battery pack 200, and the gap between the battery box 100 and the buffer structure 300 and the gap between the battery pack 200 and the buffer structure 300 are controlled. At this time, the colloid fills the gap between the battery box 100 and the buffer structure 300 and the gap between the battery pack 200 and the buffer structure 300 under the extrusion of the buffer structure 300, that is, the buffer structure 300 is overflowed on both sides, and the overflow height is usually greater than or equal to 60 mm. After the colloid is solidified, the colloid 400 can be obtained. In the implementable manner, the bottom surface of the buffer structure 300 can abut or not abut the bottom wall 120 of the battery box 100, which is not limited by the embodiment.

[0047] In another implementation, the buffer structure 300 can be first placed into the battery box 100, then the glue liquid can be injected between the buffer structure 300 and the box side wall 110 of the battery box 100 and between the buffer structure 300 and the battery pack 200, and the glue body 400 can be obtained after the glue liquid is solidified. In this implementation, the bottom surface of the buffer structure 300 and the box bottom wall 120 of the battery box 100 can have a gap, so that the two sides of the buffer structure 300 in the thickness direction can communicate through the gap, and the glue injection can be performed from one side of the buffer structure 300 in the thickness direction. The glue liquid flows into the other side of the buffer structure 300 in the thickness direction through the gap, and the amount of glue liquid on both sides of the buffer structure 300 can be relatively uniform, thereby ensuring the bonding effect. Of course, it can be understood that the bottom surface of the buffer structure 300 can also abut against the box bottom wall 120, which is not limited in the present embodiment.

[0048] If the glue liquid is filled between all the box side walls 110 of the battery box 100 and the battery pack 200, that is, the glue body 400 is provided between all the box side walls 110 of the battery box 100 and the battery pack 200, the amount of glue used will be large, the cost will be high, and the weight of the battery pack will also be increased, which is not conducive to the lightweight of the battery pack.

[0049] In one embodiment, as shown in Figure 2 The battery pack further includes a glue blocking assembly 500. The glue blocking assembly 500 includes two glue blocking blocks 510, which are sealingly arranged between the battery pack 200 and the box side wall of the battery box 100 and sealingly abut against the box bottom wall 120 of the battery box 100. For example, one side surface of the glue blocking block 510 sealingly abuts against the battery pack 200, the other side surface sealingly abuts against the box side wall 110 of the battery box 100, and the bottom surface of the glue blocking block 510 sealingly abuts against the box bottom wall 120 of the battery box 100. Furthermore, the two glue blocking blocks 510 of the glue blocking assembly 500, the battery pack 200, the box side wall 110 of the battery box 100, and the box bottom wall 120 of the battery box 100 cooperatively form a glue pouring cavity 520, the glue pouring cavity 520 accommodates the glue liquid used to form the glue body 400, and the buffer structure 300 and the glue body 400 are both arranged in the glue pouring cavity 520.

[0050] By arranging the glue blocking assembly 500, the glue body 400 does not need to fill all the space between the battery pack 200 and the box side wall 110 of the battery box 100, but only needs to fill the space where the buffer structure 300 is arranged, thereby reducing the amount of glue liquid used and reducing the cost of the battery pack. Furthermore, the volume of the glue body 400 is small, which is conducive to the lightweight of the battery pack.

[0051] In order to further reduce the volume of the glue body 400, in one embodiment, as shown in Figure 3 or Figure 5As shown, the two glue blocking blocks 510 correspond to abut against two ends of the buffer structure 300, that is, the glue blocking blocks 510 abut against the ends in the length direction of the buffer structure 300. In this way, the length of the glue filling cavity 520 formed is equal to the length of the buffer structure 300, so that there is no glue 400 between the buffer structure 300 and the glue blocking blocks 510, which can further reduce the amount of glue solution used and reduce the volume of the glue 400, thereby facilitating the lightweight of the battery pack. Of course, it can be understood that the glue blocking blocks 510 can also not abut against the ends in the length direction of the buffer structure 300, but there is a gap, and the present embodiment does not limit this.

[0052] In one embodiment, a plurality of buffer structures 300 can be provided between the battery pack 200 and the side wall 110 of the battery box 100, and a plurality of glue blocking assemblies 500 are provided one-to-one corresponding to the buffer structures 300, and each buffer structure 300 is arranged in the glue filling cavity 520 surrounded by the two glue blocking blocks 510 of the corresponding glue blocking assembly 500. In this way, each buffer structure 300 can be bonded to the battery pack 200 and the side wall 110 of the battery box 100 by the glue 400, and the volume of the glue 400 can also be small, which improves the overall structural strength of the battery pack while reducing the weight of the battery pack.

[0053] In other embodiments, the glue blocking assembly 500 and the buffer structure 300 can also each be provided with one, and the present embodiment does not limit this.

[0054] In order to facilitate the installation of the glue blocking blocks 510, the glue blocking blocks 510 are optionally of an elastic structure, that is, the glue blocking blocks 510 can elastically deform, facilitating the insertion of the glue blocking blocks 510 between the battery pack 200 and the side wall 110 of the battery box 100, and also ensuring the sealing abutment effect of the glue blocking blocks 510 with the battery box 100 and the battery pack 200, thereby forming a relatively sealed glue filling cavity 520 except for the top to avoid leakage of the glue solution. Exemplarily, the material of the glue blocking blocks 510 is foam, silicone, rubber, etc., and the present embodiment does not limit this.

[0055] When the glue 400 is formed in the glue filling manner, in order to improve the uniformity of the glue solution distribution, the buffer structure 300 of the present embodiment is provided with a glue separation piece 600. In one embodiment, at least one side of the buffer structure 300 in the thickness direction is provided with the glue separation piece 600, which can separate the space on one side of the buffer structure 300 into a plurality of connected or mutually independent subspaces to ensure that each subspace has glue solution, thereby forming the glue 400 and avoiding the occurrence of empty glue areas, so that the buffer structure 300 and the battery pack 200 or the battery box 100 have a larger bonding area, further improving the connection reliability and the integrity of the battery pack.

[0056] In an embodiment, the glue barrier 600 between the buffer structure 300 and the battery pack 200 is connected to the buffer structure 300 and / or the battery pack 200, that is, the glue barrier 600 is connected to at least one of the buffer structure 300 and the battery pack 200 to fix the position of the glue barrier 600 in the glue pouring cavity 520. In this embodiment, the glue barrier 600 between the buffer structure 300 and the battery pack 200 is connected to the buffer structure 300. In this way, the glue barrier 600 can be pre-installed on the buffer structure 300, and when the buffer structure 300 is installed in the battery box 100, the glue barrier 600 is installed in the battery box 100 together with the buffer structure 300. In order to reduce the difficulty of installing the buffer structure 300 and the glue barrier 600 in the battery box 100, there is a gap between the glue barrier 600 and the battery pack 200, that is, the glue barrier 600 does not abut against the battery pack 200, so as to avoid that the buffer structure 300 cannot be installed in place due to excessive friction between the glue barrier 600 and the battery pack 200 when the buffer structure 300 is installed.

[0057] Optionally, the glue barrier 600 between the buffer structure 300 and the box side wall 110 of the battery box 100 is connected to the buffer structure 300 and / or the box side wall 110 of the battery box 100 to fix the position of the glue barrier 600 in the glue pouring cavity 520. In this embodiment, the glue barrier 600 between the buffer structure 300 and the box side wall 110 of the battery box 100 is connected to the buffer structure 300. In this way, the glue barrier 600 can be pre-installed on the buffer structure 300, and when the buffer structure 300 is installed in the battery box 100, the glue barrier 600 is installed in the battery box 100 together with the buffer structure 300. In order to reduce the difficulty of installing the buffer structure 300 and the glue barrier 600 in the battery box 100, there is a gap between the glue barrier 600 and the battery pack 200, that is, the glue barrier 600 does not abut against the box side wall 110 of the battery box 100, so as to avoid that the buffer structure 300 cannot be installed in place due to excessive friction between the glue barrier 600 and the box side wall 110 when the buffer structure 300 is installed.

[0058] For example, the glue barrier 600 is made of foam, silica gel, rubber, etc., which is not limited in the embodiment. When the density of the glue barrier 600 is less than the density of the glue body 400, the glue barrier 600 can also reduce the amount of glue used. Since the glue barrier 600 is lighter, the weight of the battery pack can be reduced, which is beneficial to the lightweight of the battery pack.

[0059] In an embodiment, as shown in FIG. 6, the glue barrier 600 is connected to the buffer structure 300 and the box side wall 110 of the battery box 100. Figure 7As shown, the top surface of the glue barrier 600 is lower than the top surface of the buffer structure 300, and the glue 400 covers the top surface of the glue barrier 600. In this embodiment, the top surface of the glue barrier 600 is the second top surface 610, and the top surface of the buffer structure 300 is the first top surface 330. In this way, when the battery pack is assembled by the assembly method of injecting glue first and then loading the buffer structure 300, the buffer structure 300 is loaded into the battery box 100 to extrude the glue, so that the glue fills the gap between the buffer structure 300 and the battery pack 200 and the gap between the buffer structure 300 and the box side wall 110, and the top surface of the glue barrier 600 can be used as an identifier of whether the buffer structure 300 is installed in place. Specifically, during the process of pressing down the buffer structure 300, when the glue just covers the top surface of the glue barrier 600, it means that the buffer structure 300 has been installed in place, at which time it is not necessary to continue to press down the buffer structure 300, thereby ensuring the accuracy of the installation position of the buffer structure 300, and further ensuring the buffering performance or anti-impact performance of the buffer structure 300.

[0060] In other embodiments, the top surface of the glue barrier 600 is flush with the top surface of the buffer structure 300, which is not limited in this embodiment.

[0061] In order to facilitate the positioning and installation of the glue barrier 600 and the buffer structure 300, in this embodiment, as shown in Figure 7 the bottom surface of the glue barrier 600 is flush with the top surface of the buffer structure 300.

[0062] In one implementation, as shown in Figure 6 and Figure 8 the low end of the surface of the buffer structure 300 facing the battery pack 200 is provided with a shallow groove 340, and the shallow groove 340 can be provided with the glue 400. The top surface of the glue barrier 600 is flush with the groove side wall of the shallow groove 340, so as to facilitate the installation of the glue barrier 600.

[0063] The thickness of the glue barrier 600 is related to the distance between the box side wall 110 of the battery box 100 and the battery pack 200 and the thickness of the buffer structure 300. For example, the distance between the box side wall 110 of the battery box 100 and the battery pack 200 is d, the thickness of the buffer structure 300 is c, and the thickness of the glue barrier 600 is e, where e=(d-c) / 2; and 0.1mm≤e≤5mm. If the thickness of the glue barrier 600 is too large, the buffer structure 300 will be too small, which will affect the buffering performance or anti-impact performance of the buffer structure 300, and the large thickness of the glue barrier 600 will also increase the weight of the battery pack. If the thickness of the glue barrier 600 is too small, it will affect the performance of the glue, and further affect the uniformity of the glue distribution. For example, the thickness of the glue barrier 600 is 0.1mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc.

[0064] In the embodiment, as shown in Figure 6 and Figure 7 The two surfaces of the buffer structure 300 in the thickness direction are provided with a plurality of glue isolation members 600, and the glue isolation members 600 on the same surface are arranged at intervals, further improving the uniformity of glue distribution on both sides of the buffer structure 300, further ensuring the connection area of the glue body 400 with the buffer structure 300, the battery pack 200 and the side box wall, and improving the connection effect and reliability.

[0065] In an implementation, the distance between the top surface of the buffer structure 300 and the top surface of the box side wall 110 of the battery box body 100 is D, wherein D≥0, that is, the top surface of the buffer structure 300 is flush with the top surface of the box side wall 110 of the battery box body 100, so as to facilitate the positioning and installation of the buffer structure 300 in the battery box body 100.

[0066] In other implementations, as shown in Figure 8 The top surface of the buffer structure 300 is lower than the top surface of the box side wall 110 of the battery box body 100, so that the buffer structure 300 does not interfere with the connection of the box side wall 110 and the top cover of the battery box body 100.

[0067] Exemplarily, as shown in Figure 5 The buffer structure 300 comprises a box body 310 and a plurality of buffer ribs 320 arranged in the box body 310. The buffer ribs 320 separate the box body 310 to form a plurality of buffer cavities 321, which are used to buffer the impact force and have a higher buffering effect. It should be noted that, as shown in Figure 5 The box body 310 in the embodiment can be a box body 310 with an open top. It can be understood that the box body 310 can also be a sealed box body 310, which is not limited in the embodiment.

[0068] In an implementation, the buffer ribs 320 are arranged obliquely relative to the inner wall of the box body 310. In this way, the buffer ribs 320 can better support the box body 310 in the thickness direction of the box body 310, thereby improving the buffering effect of the buffer structure 300.

[0069] Exemplarily, please continue to refer to Figure 5 The plurality of buffer cavities 321 are all trapezoidal cavities and are irregular trapezoidal cavities, so as to further improve the buffering effect. Moreover, the plurality of buffer cavities 321 are arranged in sequence along the length direction of the buffer structure 300 and are distributed from one end of the buffer structure 300 to the other end, so that the buffer structure 300 has good buffering performance at each position in the length direction, preventing the occurrence of a buffering blind area, and further improving the buffering effect of the buffer structure 300.

[0070] Optionally, the material of the buffer structure 300 can be metal, plastic or composite material, and the embodiment is not limited in this regard. When the material of the buffer structure 300 is plastic or composite material, it can have higher insulation performance.

[0071] The battery pack provided by the embodiment is connected as a whole by the battery pack 200, the battery box 100 and the buffer structure 300 through the adhesive 400, so that the battery pack 200, the battery box 100 and the buffer structure 300 are connected as a whole, and the overall structure performance of the battery pack is improved. When the battery pack is applied to a vehicle, the overall structure performance includes NVH performance and collision installation performance. Specifically, the NVH performance refers to the noise (Noise), vibration (Vibration) and harshness (Harshness) performance of the vehicle.

[0072] It should be noted that the above is only the preferred embodiment of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A battery pack, characterized by, The battery pack comprises: a battery box (100), a box side wall (110) and a box bottom wall (120) of the battery box (100) form an accommodating space; a battery pack (200) is accommodated in the accommodating space and supported by the box bottom wall (120) of the battery box (100); a buffer structure (300) is arranged between the box side wall (110) of the battery box (100) and the battery pack (200), and the buffer structure (300) and the battery pack (200) and the inner wall of the battery box (100) are bonded by a glue body (400).

2. The battery pack of claim 1, wherein, The battery pack further comprises a glue blocking assembly (500), the glue blocking assembly (500) comprises two glue blocking blocks (510), the glue blocking blocks (510) are sealingly arranged between the battery pack (200) and the box side wall (110) of the battery box (100) and sealingly abut the box bottom wall (120) of the battery box (100); the two glue blocking blocks (510) of the glue blocking assembly (500), the battery pack (200), the box side wall (110) of the battery box (100) and the box bottom wall (120) of the battery box (100) cooperatively form a glue pouring cavity (520), and the buffer structure (300) and the glue body (400) are arranged in the glue pouring cavity (520).

3. The battery pack of claim 2, wherein, The two glue blocking blocks (510) correspondingly abut the two ends of the buffer structure (300); and / or, The buffer structure (300) and the glue blocking assembly (500) are one-to-one corresponding and provided with a plurality of buffer structures (300) and glue blocking assemblies (500), the buffer structure (300) is arranged in the glue pouring cavity (520) formed by the two glue blocking blocks (510) of the corresponding glue blocking assembly (500).

4. The battery pack of claim 2, wherein, At least one side of the buffer structure (300) in the thickness direction is provided with a glue separating piece (600); The glue separating piece (600) located between the buffer structure (300) and the battery pack (200) is connected to the buffer structure (300) and / or the battery pack (200), and the glue separating piece (600) located between the buffer structure (300) and the box side wall (110) of the battery box (100) is connected to the buffer structure (300) and / or the box side wall (110) of the battery box (100).

5. The battery pack of claim 4, wherein, The glue separating piece (600) is an elastic structure; and / or, the material of the glue blocking block (510) is an elastic structure.

6. The battery pack of claim 4, wherein, The top surface of the glue separating piece (600) is lower than the top surface of the buffer structure (300), and the glue body (400) covers the top surface of the glue separating piece (600); or, the top surface of the glue separating piece (600) is flush with the top surface of the buffer structure (300).

7. The battery pack of claim 4, wherein, Both surfaces of the buffer structure (300) in the thickness direction are provided with a plurality of glue separating pieces (600), and the glue separating pieces (600) located on the same surface are arranged at equal intervals.

8. The battery pack of claim 4, wherein, The top surface of the buffer structure (300) is flush with the top surface of the battery box body (100) side wall (110); And / or, The top surface of the buffer structure (300) is lower than the top surface of the battery box body (100) side wall (110); And / or, The distance between the battery box body (100) side wall (110) and the battery pack (200) is d, the thickness of the buffer structure (300) is c, the thickness of the glue isolation piece (600) is e, e=(d-c) / 2; and 0.1mm≤e≤5mm.

9. The battery pack of any one of claims 1-8, wherein, The buffer structure (300) comprises a box body (310) and a plurality of buffer ribs (320) arranged in the box body (310), the buffer ribs (320) separate the box body (310) to form a plurality of buffer cavities (321); the buffer ribs (320) are arranged obliquely relative to the inner wall of the box body (310).

10. The battery pack of claim 9, wherein, The buffer cavities (321) are trapezoidal cavities, and a plurality of the buffer cavities (321) are arranged in sequence along the length direction of the buffer structure (300).

11. The battery pack of any one of claims 1-8, wherein, The buffer structure (300) is arranged between the characteristic side wall of the battery box body (100) and the battery pack (200), and the characteristic side wall is the battery box body (100) side wall (110) whose length direction is the same as the stacking direction of the batteries in the battery pack (200).

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