Battery pack

Abstract

The utility model discloses a battery pack. The battery pack comprises a box body, a plurality of single batteries, a plurality of pressing strips and a plurality of bonding parts arranged corresponding to the pressing strips, the box body comprises a box shell and a box cover which are connected with each other, a containing cavity is formed in the box shell, and the box cover and the box shell are fixedly connected and cover the containing cavity. And the single batteries are placed in the accommodating cavities. The pressing strips are arranged between the box cover and the single batteries, the bonding part comprises a first colloid and a second colloid, and the pressing strips are fixedly connected with the box cover through the first colloid and are fixedly connected with the multiple single batteries through the second colloid, so that the box cover, the multiple pressing strips and the multiple single batteries form a whole, and the connection strength among all the parts is enhanced; therefore, the overall structural strength and stability of the battery pack are improved, and the utilization rate of the pressing strip is improved.

Description

Technical Field

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

[0002] Existing battery packs typically consist of battery cells, beading, and a housing structure to ensure battery stability and safety. Traditional battery pack designs primarily focus on the arrangement and connection of battery cells, while the design of the beading and housing structure often lacks sufficient optimization. Regarding the housing structure, traditional designs often overlook the comprehensive considerations of internal heat dissipation and external impact protection, which impacts the battery pack's service life and safety. Therefore, improving the beading and housing structure of battery packs to optimize their stability is of great technical significance and practical application value. Utility Model Content

[0003] One purpose of the present invention is to provide a battery pack, which aims to solve the technical problem of the stability of single cells.

[0004] To achieve the above-mentioned purpose, the present invention provides a solution: a battery pack, characterized in that it includes: a box body, including a box shell and a box cover, the box shell forms a accommodating cavity, the box cover and the box shell are connected and cover the accommodating cavity; a plurality of single batteries are arranged inside the accommodating cavity; a plurality of pressure strips are arranged between the box cover and the single batteries; an adhesive part, including a first colloid and a second colloid, the first colloid is arranged between the box cover and the pressure strip to connect the box cover and the pressure strip, and the second colloid is arranged between the pressure strip and the single batteries to connect the pressure strip and the single batteries.

[0005] Optionally, a first glue storage groove is provided on the side of the pressure strip facing the box cover, and the first colloid is provided in the first glue storage groove; and / or a second glue storage groove is provided on the side of the pressure strip facing the single battery, and the second colloid is provided in the second glue storage groove.

[0006] Optionally, the first glue storage groove extends along the length direction of the pressure strip, and the first glue storage groove is a continuous through structure; and / or the second glue storage groove extends along the length direction of the pressure strip, and the second glue storage groove is a continuous through structure.

[0007] Optionally, the first glue storage groove extends along the length direction of the pressure strip, and the first glue storage groove is a continuous through structure; and / or the second glue storage groove extends along the length direction of the pressure strip, and the second glue storage groove is a continuous through structure.

[0008] Optionally, the gap adjustment assembly includes a bolt and a sleeve, the sleeve is arranged on the reinforcement beam, and the bolt is passed through the pressure strip and threadedly connected to the sleeve; the sleeve includes a threaded portion and a limiting portion that are interconnected, the threaded portion is arranged in the reinforcement beam and threadedly connected to the bolt, and the limiting portion is arranged between the pressure strip and the reinforcement beam to adjust the spacing between the pressure strip and the single battery.

[0009] Optionally, an avoidance groove is provided at one end of the threaded portion close to the pressure strip, and a threaded structure cooperating with a bolt is provided at one end of the threaded portion away from the pressure strip, and a groove wall of the avoidance groove is spaced apart from the bolt.

[0010] Optionally, the outer peripheral wall of the threaded portion is provided with an anti-slip structure, and the anti-slip structure is connected to the reinforcement beam.

[0011] Optionally, the pressure strip is provided with a relief groove, and the end of the bolt away from the threaded portion is located inside the relief groove.

[0012] Optionally, the pressure strip is provided with a through hole, the bolt passes through the through hole, and a skirt is provided on the peripheral wall of the bolt, the diameter of the skirt is larger than the head of the bolt and covers the through hole.

[0013] Optionally, the multiple reinforcement beams are parallel to each other, and the multiple reinforcement beams divide the accommodating cavity into multiple installation spaces arranged in parallel, the installation spaces are used to install single batteries, and the pressure strips and the reinforcement beams are perpendicular to each other.

[0014] The beneficial effects of the present invention are:

[0015] The battery pack includes a case, multiple single cells, multiple pressure strips, and multiple adhesive portions corresponding to the pressure strips. The case includes a case shell and a case cover that are connected to each other. The case shell forms a storage cavity. The case cover and the case shell are fixedly connected and cover the storage cavity. The single cell is placed inside the storage cavity and fixedly abuts against the inner wall of the storage cavity. Multiple pressure strips are arranged at intervals. The pressure strips are arranged between the case cover and the single cell, and both ends are connected to the case. The adhesive portion includes a first colloid and a second colloid. The side wall of the pressure strip close to the case cover is bonded to the first colloid, and the side wall of the first colloid away from the pressure strip is bonded to the case cover; the side wall of the pressure strip close to the single cell is bonded to the second colloid, and the side wall of the second colloid away from the pressure strip is bonded to multiple single cells at the same time. The pressure strip is fixedly connected to the box cover through the first colloid and fixedly connected to the multiple single cells through the second colloid, so that the box cover, multiple pressure strips and multiple single cells form a whole, thereby enhancing the connection strength between the various parts, improving the displacement of the battery cells caused by vibration, thermal expansion or impact, thereby improving the overall structural strength and stability of the battery pack, and improving the utilization rate of the pressure strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1This is a schematic diagram of the exploded structure of the battery pack provided by an embodiment of the present utility model;

[0018] Figure 2 1 is a front view of a battery pack provided by an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of a partial structure for illustrating an anti-slip structure provided in an embodiment of the present utility model;

[0020] Figure 4 The embodiment of the present utility model provides Figure 2 Schematic diagram of the cross-sectional structure at the middle BB;

[0021] Figure 5 The embodiment of the present utility model provides Figure 6 A partial enlarged schematic diagram of area B in the middle;

[0022] Figure 6 The embodiment of the present utility model provides Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle;

[0023] Figure 7 The embodiment of the present utility model provides Figure 3 A partial enlarged schematic diagram of area A in the middle.

[0024] Description of Figure Numbers:

[0025] 20. Box body; 201. Box shell; 2011. Accommodating cavity; 2012. Installation space; 202. Box cover; 203. Reinforcement beam; 30. Pressure strip; 301. First glue storage slot; 302. Clearance slot; 303. Through hole; 40. Adhesive portion; 401. First colloid; 402. Second colloid; 50. Gap adjustment assembly; 501. Bolt; 5011. Skirt; 502. Sleeve; 5021. Threaded portion; 50211. Anti-slip structure; 50212. Threaded structure; 50213. Clearance slot; 5022. Limiting portion; 60. Single battery. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figures 1 to 5 As shown, Figure 1 This is a schematic diagram of the exploded structure of the battery pack provided by an embodiment of the present utility model; Figure 21 is a front view of a battery pack provided by an embodiment of the present utility model; Figure 3 This is a schematic diagram of a partial structure for illustrating an anti-slip structure provided in an embodiment of the present utility model; Figure 4 The embodiment of the present utility model provides Figure 2 Schematic diagram of the cross-sectional structure at the middle BB; Figure 5 The embodiment of the present utility model provides Figure 6 A partial enlarged schematic diagram of area B in the middle.

[0028] The embodiment of the present utility model provides a battery pack, including a case 20, a plurality of single cells 60, a plurality of pressure strips 30, and a plurality of adhesive portions 40 arranged corresponding to the pressure strips 30. The case 20 includes a case shell 201 and a case cover 202 that are connected to each other. The case shell 201 and the case cover 202 can be fixed by bolts, rivets, or other methods such as welding and bonding. The case shell 201 is formed with a accommodating cavity 2011, and the case cover 202 is fixedly connected to the case shell 201 and covers the accommodating cavity 2011. The single cell 60 is placed inside the accommodating cavity 2011 and fixed in contact with the inner wall of the accommodating cavity 2011. The plurality of pressure strips 30 are arranged at intervals, and the pressure strips 30 are arranged between the case cover 202 and the single cell 60, and both ends of the pressure strips 30 are connected to the case shell 201.

[0029] Specifically, the bonding portion 40 includes a first colloid 401 and a second colloid 402. The first colloid 401 can be made of silicone, butyl rubber, epoxy resin, polyurethane glue, or polyimide glue, while the second colloid 402 can be made of silicone, butyl rubber, epoxy resin, polyurethane glue, or polyimide glue. The side of the bead 30 near the lid 202 is bonded to the first colloid 401, while the side of the first colloid 401 away from the bead 30 is bonded to the lid 202. The side of the bead 30 near the battery 60 is bonded to the second colloid 402, while the side of the second colloid 402 away from the bead 30 is bonded to multiple battery cells 60 simultaneously.

[0030] In actual application, during the assembly of the battery pack, the single battery 60 is first placed inside the accommodating cavity 2011, and then the pressure strip 30 is installed on the pressure strip 30. The pressure strip 30 is fixedly connected to the box cover 202 through the first colloid 401, and is fixedly connected to multiple single batteries 60 through the second colloid 402, so that the box cover 202, multiple pressure strips 30 and multiple single batteries 60 form a whole, thereby enhancing the connection strength between the various parts, improving the displacement of the battery unit caused by vibration, thermal expansion or impact, thereby improving the overall structural strength and stability of the battery pack, and improving the utilization rate of the pressure strip 30.

[0031] Further, see Figure 3 and Figure 5The pressure strip 30 has a first adhesive storage groove 301 on one side of the pressure strip 30 facing the cover 202, and the first adhesive 401 is disposed in the first adhesive storage groove 301. Optionally, the pressure strip 30 has a second adhesive storage groove on one side of the pressure strip 30 facing the battery 60, and the second adhesive 402 is disposed in the second adhesive storage groove. Alternatively, the second adhesive storage groove may be disposed only on the side of the pressure strip 30 facing the battery 60.

[0032] In actual application, in the process of applying glue to the side of the bead 30 facing the box cover 202 to form the first colloid 401, the first glue storage groove 301 forms a space between the bead 30 and the box cover 202 for accommodating unsolidified colloid, thereby limiting the flow range of the unsolidified colloid and reducing the risk of unsolidified colloid overflowing the bead 30. In addition, the side walls of the first colloid 401 formed after the colloid solidifies are respectively adhered to the inner walls of the first glue storage groove 301 and the inner walls of the box cover 202, ensuring that the first colloid 401 is evenly distributed at specific positions between the bead 30 and the box cover 202, and between the bead 30 and the single battery 60. That is, through the reasonable storage and distribution of the colloid, the stability of the connection between the bead 30 and the box cover 202 is improved. Similarly, when applying glue to the side of the pressure strip 30 facing the single cell 60, the second glue storage groove can limit the flow range of the unsolidified glue, reduce the risk of the unsolidified glue overflowing the pressure strip, and make the side walls of the second glue 402 formed after the glue solidifies fit with the inner wall of the second glue storage groove and the shoulder of the single cell 60 respectively, thereby improving the stability of the connection between the pressure strip 30 and the single cell 60.

[0033] Further, see Figure 3 The first glue storage groove 301 extends along the length direction of the layering strip 30, and the first glue storage groove 301 is a continuous through structure. Optionally, when the layering strip 30 is provided with a second glue storage groove, the second glue storage groove extends along the length direction of the layering strip 30, and the second glue storage groove is a continuous through structure.

[0034] In actual use, when applying glue to the side of the bead 30 facing the case lid 202 to form the first colloid 401, because the first glue reservoir 301 is a continuous, through-hole structure, the glue flows along the length of the first glue reservoir 301 until it fills the first glue reservoir 301. This reduces the accumulation of glue and overflow, improves the continuity and uniformity of the first colloid 401 formed by the solidification of the glue, further enhances the connection strength between the bead 30 and the case lid 202, and thus improves the overall structural strength and stability of the battery pack. Similarly, when applying glue to the side of the bead 30 facing the single cell 60 to form the second colloid 402, the second glue reservoir can improve the continuity and uniformity of the second colloid formed by the solidification of the glue, further enhancing the connection strength between the bead 30 and the single cell 60.

[0035] In one embodiment, see Figure 1 and Figure 2 The box body 20 includes a plurality of reinforcement beams 203 spaced apart within the accommodating cavity 2011. Both ends of the reinforcement beams 203 are connected to the box shell 201. The reinforcement beams 203 and the box shell 201 can be fixed by bolts, rivets, welding, adhesive, or other methods. The pressure strips 30 are arranged along the line connecting the plurality of reinforcement beams 203 and are connected to the reinforcement beams.

[0036] Specifically, the battery pack further includes a gap adjustment assembly 50 , which is connected to the holding strip 30 and the reinforcement beam 203 , respectively. The gap adjustment assembly 50 is used to adjust the distance between the holding strip 30 and the single battery 60 .

[0037] In actual use, when the housing 201 is impacted by external forces, the reinforcement beams 203 enable the forces to be transmitted and decomposed in multiple directions, thereby reducing stress concentration on the housing 201 caused by uneven force, which can lead to localized deformation or damage, and thus improving the overall strength of the housing 201. When producing batteries 60 of different sizes, the gap adjustment assembly 50 allows the position of the bead 30 to be adjusted according to the size of the battery 60, thereby changing the spacing between the bead 30 and the battery 60 and adjusting the thickness of the second colloid 402. This design adapts to the needs of securing batteries 60 of different sizes, improving the versatility and flexibility of the battery pack.

[0038] In one embodiment, see Figure 2 、 Figure 6 and Figure 7 The gap adjustment assembly 50 is provided at intervals along the length direction of the pressure strip 30. The gap adjustment assembly 50 includes a bolt 501 and a screw sleeve 502. The screw sleeve 502 includes a coaxially fixed threaded portion 5021 and a limiting portion 5022. The threaded portion 5021 is embedded in the reinforcement beam 203. The main shape of the threaded portion 5021 can be a cylindrical shell, or a polygonal shell. The limiting portion 5022 protrudes from the box shell 201 and is provided between the pressure strip 30 and the reinforcement beam 203. The main shape of the limiting portion 5022 can be a circular ring, or a polygonal shape. The bolt 501 passes through the pressure strip 30 and is threadedly connected to the threaded portion 5021.

[0039] In actual application, when assembling the battery pack, first place multiple single cells 60 in the accommodating cavity 2011, then place the corresponding screw sleeve 502 of the pressure strip 30 on the box shell 201, and then pass the bolt 501 through the pressure strip 30 and threadedly cooperate with the threaded portion 5021 of the screw sleeve 502 until the pressure strip 30 is close to the side wall of the single cell 60 and abuts against the limiting portion 5022. At this time, the distance between the pressure strip 30 and the single cell 60 is the thickness of the limiting portion 5022 minus the height of the protruding threaded portion 5021 of the single cell 60, that is, the distance between the pressure strip 30 and the single cell 60 can be adjusted by replacing the limiting portion 5022 of different thicknesses. The combination of the bolt 501 and the threaded portion 5021 realizes precise control of the distance between the pressure strip 30 and the single cell 60, which is convenient for assembly. After the multiple beadings 30 are installed, glue is applied to both sides of the beading 30 to form a first glue body 401 and a second glue body 402, and the box cover 202 and the box shell 201 are connected so that the side wall of the beading 30 close to the box cover 202 is fixedly connected to the box cover 202 through the first glue body 401, and the side wall of the beading 30 close to the single battery 60 is fixedly connected to the multiple single batteries 60 through the second glue body 402.

[0040] In one embodiment, referring to Figure 7 An avoidance groove 50213 is provided at one end of the threaded portion 5021 close to the pressure strip 30, and a threaded structure 50212 cooperating with the bolt 501 is provided at one end of the threaded portion 5021 away from the pressure strip 30, and the groove wall of the avoidance groove 50213 and the bolt 501 are spaced apart.

[0041] In actual application, the bolt 501 is connected to the threaded portion 5021 via the threaded structure 50212. During the subsequent gluing process, the colloid may flow or overflow into the connection area between the threaded structure 50212 and the bolt 501, causing the threaded portion 5021 and the threads of the bolt 501 to bond and solidify, making it impossible to smoothly remove the pressure strip 30 from the housing 201, thereby affecting the subsequent maintenance or replacement of the single battery 60. To avoid such problems, the design of the avoidance groove 50213 can effectively store some of the colloid when the colloid overflows, thereby reducing the possibility of the colloid entering the connection between the threaded structure 50212 and the bolt 501. Through the reasonable configuration of the avoidance groove 50213, the risk of the threaded portion 5021 and the bolt 501 being unable to be removed due to colloid adhesion can be significantly reduced, ensuring the convenience and reliability of the battery pack during maintenance or replacement.

[0042] In one embodiment, referring to Figure 3 and Figure 7The outer wall of the threaded portion 5021 is provided with an anti-slip structure 50211. The anti-slip structure 50211 is a plurality of protrusions arranged around the threaded portion 5021 and at intervals. The protrusions can be strip-shaped and arranged along the axial direction of the threaded portion 5021. The anti-slip structure 50211 is embedded in the reinforcement beam 203 and fixedly connected to the reinforcement beam 203.

[0043] In actual application, when the bolt 501 and the threaded portion 5021 are matched, it is possible that after the bolt 501 and the threaded portion 5021 are in place, the bolt 501 continues to be rotated. At this time, there is a risk that the bolt 501 drives the screw sleeve 502 to rotate relative to the reinforcement beam 203 through the threaded portion 5021, causing the screw sleeve 502 to fail. An anti-slip structure 50211 is provided on the outer peripheral wall of the threaded portion 5021. Since the anti-slip structure 50211 is shaped like a convexity and is embedded in the reinforcement beam 203, when the screw sleeve 502 tends to rotate, the anti-slip structure 50211 clamps the screw sleeve 502, making it difficult for the screw sleeve 502 to rotate, thereby effectively preventing the screw sleeve 502 from rotating or loosening during operation. The anti-slip design enhances the fixing effect of the screw sleeve 502, thereby ensuring that the connection between the reinforcement beam 203 and the pressure strip 30 is more firm and reliable, further improving the overall structural strength and stability of the battery pack, and ensuring the safety and durability of the battery pack during long-term use.

[0044] In one embodiment, referring to Figure 3 and Figure 7 A plurality of clearance grooves 302 are provided on one side wall of the pressure strip 30 away from the single battery 60 . The clearance grooves 302 are arranged in one-to-one correspondence with the threaded sleeves 502 . When the bolt 501 is threadedly engaged with the threaded portion 5021 , the end of the bolt 501 away from the threaded portion 5021 is located inside the clearance groove 302 .

[0045] In practice, after the bolt 501 and the threaded sleeve 502 are properly engaged, the end of the bolt 501 away from the threaded portion 5021 is completely located within the clearance groove 302, effectively preventing direct friction or interference between the bolt 501 and the cover 202, while also making the battery pack structure more compact. This design optimization reduces the space occupied by the battery pack, improves the rationality and compactness of the overall layout, and facilitates more efficient component arrangement and installation within limited space.

[0046] In one embodiment, referring to Figure 7 The pressure strip 30 is provided with a through hole 303, which is connected to the give way groove 302. The bolt 501 passes through the through hole 303. A skirt 5011 is fixedly connected to the peripheral wall of the bolt 501. The skirt 5011 is annular. The diameter of the skirt 5011 is larger than the head of the bolt 501 and covers the through hole 303. When the bolt 501 and the screw sleeve 502 are in place, the skirt 5022 seals the through hole 303.

[0047] In actual use, when applying glue, the glue may flow or overflow into through-hole 303. At this time, because the diameter of skirt 5011 is larger than the head of bolt 501 and covers through-hole 303, the glue is blocked by skirt 5011 and is not easily able to pass through through-hole 303 and enter the connection area between threaded portion 5021 and bolt 501. This reduces the accumulation of glue between the threads and avoids the problem of difficult disassembly caused by glue adhering to the threads. This structural design reduces the risk of being unable to successfully remove bolt 501 during maintenance or replacement, and improves the convenience and reliability of the battery pack in subsequent operations.

[0048] In one embodiment, referring to Figure 1 , multiple reinforcement beams 203 are arranged parallel to each other, and multiple reinforcement beams 203 divide the accommodating cavity 2011 into multiple parallel installation spaces 2012, and multiple installation spaces 2012 are arranged perpendicular to the connection direction of the multiple reinforcement beams 203. The pressure strip 30 and the reinforcement beam 203 are arranged perpendicular to each other, and the middle part of the pressure strip 30 is connected to the reinforcement beam 203 by the cooperation of bolts 501 and screw sleeves 502. The two ends of the pressure strip 30 are respectively connected to the two reinforcement beams 203 with the largest spacing by the cooperation of bolts 501 and screw sleeves 502.

[0049] In actual applications, when placing single cells 60 into the installation space 2012, compared with the installation space 2012 arranged along a rectangular array, the parallel installation space 2012 reduces the number of times the installation space 2012 is split, thereby increasing the volume of a single installation space 2012, so that the battery module can include single cells 60 with larger sizes and fewer numbers, thereby effectively saving the packing time of the single cells 60 and improving production efficiency.

[0050] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship and movement status of the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0051] It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element through an intervening element.

[0052] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0053] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A battery pack, characterized in that: include: The box body comprises a box shell and a box cover, wherein the box shell forms a receiving cavity, and the box cover is connected to the box shell and covers the receiving cavity; A plurality of single cells are arranged inside the accommodating cavity; A plurality of pressure strips are provided between the box cover and the single battery; The bonding part includes a first colloid and a second colloid, wherein the first colloid is arranged between the box cover and the pressure strip to connect the box cover and the pressure strip, and the second colloid is arranged between the pressure strip and the single battery to connect the pressure strip and the single battery.

2. The battery pack according to claim 1, wherein: A first glue storage groove is provided on the side of the pressure strip facing the box cover, and the first colloid is provided in the first glue storage groove; and / or a second glue storage groove is provided on the side of the pressure strip facing the single battery, and the second colloid is provided in the second glue storage groove.

3. The battery pack according to claim 2, wherein: The first glue storage groove extends along the length direction of the pressure strip, and the first glue storage groove is a continuous through structure; and / or the second glue storage groove extends along the length direction of the pressure strip, and the second glue storage groove is a continuous through structure.

4. The battery pack according to claim 1, wherein: The box body further comprises a plurality of reinforcing beams spaced apart in the accommodating cavity, wherein the plurality of reinforcing beams are connected to the box shell; The battery pack further includes a gap adjustment assembly, which is connected to the pressure strip and the reinforcement beam respectively, and is used to adjust the distance between the pressure strip and the single battery.

5. The battery pack according to claim 4, characterized in that: The gap adjustment assembly includes a bolt and a screw sleeve, wherein the screw sleeve is arranged on the reinforcement beam, and the bolt passes through the pressure strip and is threadedly connected to the screw sleeve; The screw sleeve includes a threaded portion and a limiting portion that are connected to each other. The threaded portion is arranged in the reinforcement beam and is threadedly connected to the bolt. The limiting portion is arranged between the pressure strip and the reinforcement beam to adjust the distance between the pressure strip and the single battery.

6. The battery pack according to claim 5, characterized in that: An avoidance groove is provided at one end of the threaded portion close to the pressure strip, and a threaded structure cooperating with the bolt is provided at one end of the threaded portion away from the pressure strip. The groove wall of the avoidance groove is spaced apart from the bolt.

7. The battery pack according to claim 5, characterized in that: An outer peripheral wall of the threaded portion is provided with an anti-slip structure, and the anti-slip structure is connected to the reinforcement beam.

8. The battery pack according to claim 5, characterized in that: The pressure strip is provided with a clearance groove, and one end of the bolt away from the threaded portion is located inside the clearance groove.

9. The battery pack according to claim 5, characterized in that: The pressure strip is provided with a through hole, the bolt passes through the through hole, and a skirt is provided on a peripheral wall of the bolt. The diameter of the skirt is larger than the head of the bolt and covers the through hole.

10. The battery pack according to claim 4, characterized in that: The multiple reinforcement beams are parallel to each other, and the multiple reinforcement beams divide the accommodating cavity into a plurality of installation spaces arranged in parallel. The installation spaces are used to install the single batteries. The holding strips and the reinforcement beams are perpendicular to each other.

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