CN217158505U - Battery and power consumption device - Google Patents

Abstract

The application discloses battery and power consumption device. A battery, comprising: a plurality of battery cells arranged in a first direction; the battery box comprises a box body and a battery box body, wherein the box body is provided with a containing space for containing a battery monomer, the box body comprises two side beams which extend along a first direction and two end beams which extend along a second direction, the side beams and the end beams are mutually connected to enclose the containing space, and the second direction is vertical to the first direction; and a fastening device, the fastening device comprising: the fixing assembly comprises at least two fixing pieces which are respectively and correspondingly arranged on the two end beams; the fastening rope is wound by at least one circle between the at least two fixing pieces, and the end part of the fastening rope is fixed with other parts of the fastening rope. Through the cooperation of fixed subassembly and fastening rope, can restrain the influence of the inflation of battery monomer to the box. In addition, since the fastening rope has flexibility, even in the case where there is a positional deviation of the fixing pieces provided on the two end beams, respectively, it is possible to avoid the difficulty in installation caused by the tolerance by adjusting the length of the fastening rope.

Description

Battery and power consumption device

Technical Field

The application relates to the field of batteries, in particular to a battery and a power utilization device.

Background

Energy conservation and emission reduction are the key points of sustainable development of the automobile industry, and electric vehicles become important components of the sustainable development of the automobile industry due to the advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in its development.

When the battery is used in a charging and discharging process, the battery cell expands and applies expansion force to the end beam forming the battery box body, and if the end beam is fixed to the side beam of the box body only by welding without inhibiting the expansion structure of the battery cell, the welding seam cracks under long-term use so as to cause the failure of the battery box body structure.

Steel ties, which are fastened to the end beams by rivets, are currently commonly used to inhibit cell expansion. However, because the problem of manufacturing tolerance of the battery box is difficult to avoid, the rivet holes in the end beams of the battery box which is actually produced have a certain degree of positional deviation, so that the steel cable ties are difficult to install due to the deviation of the hole positions during installation. In addition, in order to fix the steel cable tie on the end beam through the rivet, the end of the steel cable tie needs to be welded with a T-shaped adapter, so that the welding process is increased, and the cost is increased.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present application provides a battery and an electric device, which can prevent the expansion of a battery cell while avoiding the difficulty in mounting due to the tolerance of a case.

In a first aspect, the present application provides a battery comprising: a plurality of battery cells arranged in a first direction; the box body is provided with a containing space for containing the battery cells and comprises two side beams extending along the first direction and two end beams extending along the second direction, the side beams and the end beams are connected with each other to enclose the containing space, and the second direction is perpendicular to the first direction; and a fastening device, the fastening device comprising: the fixing assembly comprises at least two fixing pieces which are respectively and correspondingly arranged on the two end beams; and the fastening rope is wound by at least one circle between at least two fixing pieces, and the end part of the fastening rope is fixed with other parts of the fastening rope.

Among the technical scheme of this application embodiment, through the cooperation that sets up the fixed subassembly on the end beam of box and the tight rope that the winding set up on fixed subassembly, can restrain the influence of the inflation of battery monomer along first direction to the end beam. In addition, because the fastening rope has certain flexibility, even if the fixing pieces respectively arranged on the two end beams in the fixing assembly have position deviation, the installation difficulty caused by the tolerance can be avoided by adjusting the length of the fastening rope.

In some embodiments, the fastening device further comprises a latch, the latch comprises a pressing plate, a locking member and a bottom wall, the pressing plate and the bottom wall are arranged at intervals, the fastening rope is arranged between the pressing plate and the bottom wall, and the locking member is used for adjusting the distance between the pressing plate and the bottom wall so as to fix the fastening rope. Therefore, the distance between the pressing plate and the bottom wall is adjusted through the fastening piece, the fastening rope is pressed and fixed between the pressing plate and the bottom wall, and the fastening rope can be prevented from being wound and loosened to the extent that tensioning force cannot be provided.

In some embodiments, the bottom wall of the latch is in face contact with the mount. Therefore, compared with the condition that the fastening rope is in direct line contact with the fixing piece, the contact area of the bottom wall of the lock catch and the fixing piece is increased through surface contact of the bottom wall of the lock catch and the fixing piece, and therefore larger friction force is provided, and the lock catch can be better limited to move along the circumferential direction of the fastening rope due to expansion force of the battery cells.

In some embodiments, the retaining member further comprises: the pressing plate is provided with a through hole, and the bolt is arranged on the bottom wall and is connected with the locking nut through the through hole so as to adjust the distance between the pressing plate and the bottom wall. Through the bolt and the lock nut's of being as the retaining member connection, interval between adjustment clamp plate and the diapire that can be nimble to compress tightly the fastening rope and fix between clamp plate and diapire, avoid leading to unable the condition of fixing the fastening rope between clamp plate and diapire because of the installation error or the manufacturing error of hasp etc. that bring the fastening rope when setting up between diapire and clamp plate.

In some embodiments, the fastening device includes a buckle, and the buckle includes a first clamping portion and a second clamping portion which are adjacently disposed, the first clamping portion accommodates an end portion of the fastening rope therein, and the second clamping portion accommodates other portions of the fastening rope therein, so as to fix the end portion of the fastening rope and the other portions of the fastening rope. The design further fixes the fastening rope, and the condition that the fastening rope is wound and loosened to the extent that tension cannot be provided is avoided.

In some embodiments, the fixing member is provided with a flange at an end portion of the fixing member distant from the end beam in a height direction of the box body to restrict the fastening rope from being detached from the fixing member.

In some embodiments, the fastening device comprises a plurality of sets of the fixing assemblies, and the fixing pieces of the plurality of sets of the fixing assemblies are arranged on the end beam at intervals along the second direction; in the plurality of groups of fixing assemblies, in the second direction, the tension force of the fastening rope wound on the fixing piece positioned in the middle of the end beam is greater than the tension force of the fastening rope wound on the fixing pieces positioned on both sides. Generally, the end beam is connected to the side beam at both ends thereof in the second direction by welding or the like to form a space for accommodating the battery cells, without a fixing structure in the middle of the end beam. Therefore, the middle part of the end beam is stressed and deformed greatly when the battery cell expands. Through the design of this application embodiment, can restrain the influence of the inflation of battery monomer to the middle part of end beam more effectively.

In some embodiments, the fastening cord is wound across a plurality of the fixing pieces arranged in the second direction, and the number of turns of the fastening cord wound on the fixing piece located at the middle of the end beam is greater than the number of turns of the fastening cord wound on the fixing pieces located at both sides in the second direction. The number of turns of the fastening rope wound on the fixing part positioned in the middle of the end beam is increased, so that the tension of the fastening rope wound on the fixing part positioned in the middle of the end beam is greater than the tension of the fastening rope wound on the fixing parts positioned on two sides. As described above, the middle portion of the end beam is subjected to a large force and deformation when the battery cell expands. Through the design of this embodiment, can offset the atress in the middle part of end beam when the battery monomer inflation, further restrain the influence of the inflation of battery monomer to the middle part of end beam.

In some embodiments, in the second direction, the fastening ropes wound on the fixing parts at both sides of the end beam are also wound on the fixing part at the middle part. Through the design, the tightening force of the fastening ropes wound on the fixing parts on the two sides is superposed on the fixing part in the middle, so that the tightening force of the fastening ropes wound on the fixing part in the middle is greater than that of the fastening ropes wound on the fixing parts on the two sides. Thereby, the influence of the expansion of the battery cell on the case can be effectively suppressed.

In a second aspect, the present application provides an electric device comprising the battery of the above embodiment, the battery being used for providing electric energy.

The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:

fig. 1 is a schematic structural diagram of a vehicle according to an embodiment of the present application.

FIG. 2 is a schematic diagram of a cell according to some embodiments of the present application;

FIG. 3 is an exploded view of a battery according to some embodiments of the present application;

FIG. 4 is a partial schematic structural view of the portion B shown in FIG. 1;

FIG. 5 is a partially exploded view of the portion B shown in FIG. 1;

FIG. 6 is a schematic structural view of a latch according to some embodiments of the present application;

FIG. 7 is a schematic top view of a latch according to some embodiments of the present application;

FIG. 8 is a cross-sectional view of a latch according to some embodiments of the present application;

FIG. 9 is a side view of a latch according to some embodiments of the present application;

FIG. 10 is a schematic structural view of a clasp according to some embodiments of the present application;

FIG. 11 is a schematic cross-sectional view of the battery shown in FIG. 1 taken along the direction C-C;

FIG. 12 is a partial schematic view of the structure of the section E shown in FIG. 10;

FIG. 13 is a schematic illustration of the manner in which the fastening cord is wound in accordance with some embodiments of the present application;

fig. 14 is a schematic structural view of a prior art battery;

FIG. 15 is a partial schematic view of the structure of the portion A shown in FIG. 13;

the reference numbers in the detailed description are as follows:

vehicle 1000

Motor 300

Controller 200

Battery 100

Battery cell 1

Case 2

Side member 21

End beam 22

Front end beam 22a

Rear end beam 22b

Fastening device 3

Fixing assembly 31

Fixing member 310

First fixing member 310A

Second fixing member 310B

Third fixing member 310C

Fourth fixing member 310D

Fifth fixing member 310E

Flange 3111

Card slot 3112

Fastening cord 32

First fastening cord 32A

Second fastening cord 32B

Third fastening cord 32C

Lock catch 33

Pressure plate 331

Retaining member 332

Bottom wall 333

Bolt 3321

Lock nut 3322

Buckle 34

First engaging portion 341

Second clamping part 342

Steel tie 6

Rivet 7

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different elements and not for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "attached" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The term "and/or" in this application is only one kind of association relationship describing the associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this application generally indicates that the former and latter related objects are in an "or" relationship.

The appearances of "a plurality" in this application are intended to mean more than two (including two).

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery may include a battery module or a battery pack, etc. Batteries generally include a case for enclosing one or more battery cells. The box can avoid liquid or other foreign matters to influence the charging or discharging of battery monomer.

The battery cell can be in a cylinder, a flat body, a cuboid or other shapes. The battery cells are generally divided into three types in an encapsulation manner: the battery comprises a cylindrical battery monomer, a square battery monomer and a soft package battery monomer.

A plurality of battery cells may be connected in series and/or in parallel via electrode terminals to be applied to various applications. In some high power applications, such as electric vehicles, the application of batteries includes three levels: battery monomer, battery module and battery package. As technology develops, this level of battery modules may be omitted, i.e., battery packs are formed directly from battery cells. The improvement leads the weight energy density and the volume energy density of the battery system to be improved, and simultaneously, the number of parts is obviously reduced.

The present inventors have found that the battery cell 1 swells during charge and discharge. Conventionally, as shown in fig. 14 and 15, a steel tie 6 is generally used to suppress deformation of the end beam 22 when the battery cell 1 is expanded. The end beam 22 welded to the side beam 21 is provided with rivet holes and the T-joint at the end of the steel tie 6 is also provided with corresponding rivet holes, the steel tie 6 being secured to the end beam 22 by rivets 7. When the battery cell 1 expands, the steel tie 6 can tighten the front and rear end beams 22 and absorb a part of the expansion force. However, the suppression of the expansion of the battery cell 1 by the steel ribbon 6 causes the following problems. Firstly, the rivet holes of the actually produced end beam 22 may have position deviation, so that the steel cable ties 6 are difficult to install due to the position deviation of the hole. Furthermore, when the steel ribbon 6 is prepared, the raw materials are generally standard stainless steel coiled materials, but because the rivet fixing part needs to be widened, a T-shaped adapter needs to be additionally welded at the end part of the steel strip, other raw materials with different specifications need to be prepared at the rivet fixing part, welding procedures are added, and management cost is greatly increased.

In view of this, the present application provides a battery comprising: a plurality of battery cells arranged in a first direction; the battery box comprises a box body and a battery box body, wherein the box body is provided with a containing space for containing a battery monomer, the box body comprises two side beams which extend along a first direction and two end beams which extend along a second direction, the side beams and the end beams are mutually connected to enclose the containing space, and the second direction is vertical to the first direction; and a fastening device, the fastening device comprising: the fixing assembly comprises at least two fixing pieces which are respectively and correspondingly arranged on the two end beams; the fastening rope is wound by at least one circle between the at least two fixing pieces, and the end part of the fastening rope is fixed with other parts of the fastening rope. According to the technical scheme, the fixing assembly arranged on the end beam of the box body is matched with the fastening rope wound on the fixing assembly, so that the influence of the expansion of the battery cells along the first direction on the end beam can be inhibited. In addition, because the fastening rope has certain flexibility, even if the fixing pieces respectively arranged on the two end beams in the fixing assembly have position deviation, the length of the fastening rope can be adjusted to avoid the difficulty in installation caused by the tolerance.

Some embodiments of the present application provide an electric device including a battery for providing electric energy. Alternatively, the device may be a vehicle, a ship, a spacecraft, or the like.

The technical scheme described in the embodiment of the application is applicable to various devices, such as mobile phones, portable devices, notebook computers, battery cars, electric toys, electric tools, electric vehicles, ships, spacecrafts and the like, for example, the spacecrafts comprise airplanes, rockets, space shuttles, spacecrafts and the like.

It should be understood that the technical solutions described in the embodiments of the present application are not limited to be applied to the above-described devices, but may be applied to all devices using a battery, and for brevity of description, the following embodiments are all described by taking an electric vehicle as an example.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present disclosure. The vehicle 1000 may be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile may be a pure electric automobile, a hybrid electric automobile, or a range-extended automobile, etc. The battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may serve as an operation power source of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to supply power to the motor 300, for example, for starting, navigation, and operational power requirements while the vehicle 1000 is traveling.

In some embodiments of the present application, the battery 100 may be used not only as an operating power source of the vehicle 1000, but also as a driving power source of the vehicle 1000, instead of or in part of fuel or natural gas, to provide driving power for the vehicle 1000.

Referring to fig. 2 and 3, fig. 2 is a schematic structural view of a battery according to some embodiments of the present disclosure, and fig. 3 is an exploded structural view of a battery according to some embodiments of the present disclosure. The present application provides a battery 100 comprising: a plurality of battery cells 1, a case 2, and a fastening device 3. Wherein the plurality of battery cells 1 are arranged in a first direction. The case 2 has an accommodation space that accommodates the battery cell 1, and includes: two side members 21 extending in the first direction Y, and two end members 22 extending in the second direction X, the side members 21 and the end members 22 being connected to each other to enclose a housing space. The fastening device 3 comprises a fixing member 31 and a fastening cord 32. The fixing assembly 31 includes at least two fixing members 310 respectively disposed on the two end beams 22. The fastening cord 32 is wound at least one turn between at least two of the fixing pieces 310, and the end of the fastening cord 32 is fixed to the other portion of the fastening cord 32.

As shown in the drawing, the first direction Y is a longitudinal direction of the battery 100. The second direction X is the width direction of the case 2. The third direction Z is the height direction of the case 2. The first direction Y, the second direction X and the third direction Z are perpendicular to each other.

The battery 100 includes a case 2 and a battery cell 1, and the battery cell 1 is accommodated in the case 2. In the battery 100, the number of the battery cells 1 may be multiple, and the multiple battery cells 1 may be connected in series or in parallel or in series-parallel, where in series-parallel refers to that the multiple battery cells 1 are connected in series or in parallel. Each battery cell 1 may be a secondary battery or a primary battery; but is not limited to, a lithium sulfur battery, a sodium ion battery, or a magnesium ion battery. The battery cell 1 may be cylindrical, flat, rectangular parallelepiped, or other shape.

The case 2 is used for providing a containing space for the battery cells 1, and the case 2 may have various structures. For example, the case 2 includes a pair of side members 21 extending in the first direction Y and a pair of end members 22 extending in the second direction X. The end beams 22 may be connected to the side beams 21 at both ends thereof in the second direction X by welding or the like to form a space for accommodating the battery cells 1.

The fixing assembly 31 includes at least two fixing members 310 respectively disposed on the two end beams 22. The connecting line of the two fixing members 310 may be parallel to the first direction Y (i.e., the two fixing members 310 are disposed opposite to each other along the first direction Y), or may be at an angle with respect to the first direction Y, as long as the fastening rope 32 wound around the two fixing members 310 can apply a force to the end beam 22 along the first direction Y. In addition, the fixing assembly 31 may also include more than two fixing members 310. For example, the fixing assembly 31 may include 2 fixing pieces 310 provided on the front end beam 22a and 1 fixing piece 310 provided on the rear end beam 22 b. The number and positions of the fixing members 310 included in the fixing unit 31 can be flexibly set as long as the fastening cord 32 wound around the fixing unit 31 can apply a force in the first direction Y to the end beam 22 (the front end beam 22a and the rear end beam 2 b). The fixing member 310 may be formed integrally with the end beam 22, or may be formed separately from the end beam 22 and provided to the end beam 22 by welding or the like, for example. When the fixing member 310 is disposed on the end beam 22 by welding or the like, as shown in fig. 3, a welding flange may be disposed at a portion where the fixing member 310 and the end beam 22 contact, so as to increase a welding area.

When the battery cell 1 expands, the end beam 22 is deformed by the expansion force of the battery cell 1. At this time, the fastening cord 32 applies a tightening force in the first direction Y to the end beam 22, and restricts deformation of the end beam 22. As shown in fig. 2 and 4, the fastening string 32 may be wound around the fixing unit 31 by 1 turn, or 1 or more turns of the fastening string 32 may be wound around the fixing unit. The end of the securing cord 32 is secured to the remainder of the securing cord 32, such as by a weld-in tail, thereby avoiding a situation where the securing cord 32 is unwound and fails to provide tension. The tension of the fastening rope 32 can be set by adjusting the length of the fastening rope 32, and the tension of the fastening rope 32 can be set according to the stress of the end beam 22. The fastening rope 32 may be a steel wire rope, or may be other flexible ropes meeting the strength requirement. In addition, in order to reinforce the insulation between the fastening cord 32 and the battery cell 1, an insulating material may be coated outside the fastening cord 32.

In the event of a deviation in the position of the fixing member 310, in some embodiments, because the fastening cord 32 has flexibility, it is possible to avoid a situation in which the tolerance causes difficulty in installation. In addition, in other embodiments, the fastening cord may not be flexible, and the difficulty in installation due to the tolerance can be further avoided by adjusting the length of the fastening cord 32. By adjusting the length of the fastening cord 32 and the number and position of the fixing elements 310 in the fixing assembly 31, the tension provided by the fastening cord 32 can be designed more flexibly.

According to some embodiments of the present application, optionally, with reference to fig. 4-9, the fastening device 3 further comprises a catch 33. The latch 33 comprises a pressing plate 331, a locking member 332 and a bottom wall 333, the pressing plate 331 and the bottom wall 333 are arranged at a distance, the fastening rope 32 is arranged between the pressing plate 331 and the bottom wall 333, and the locking member 332 is used for adjusting the distance between the pressing plate 331 and the bottom wall 333 to fix the fastening rope 32.

As shown in fig. 4, the fastening cord 32 is inserted between the bottom wall 333 and the pressing plate 331, so that the fastening cord 32 is fixed by adjusting the distance between the pressing plate 331 and the bottom wall 333. When the fastening rope 32 receives the expansion force applied by the battery cell 1, the fastener 33 fixes the fastening rope 32, so that the fastening rope 32 does not loosen, and the deformation of the end beam 22 can be reduced, and the further expansion deformation of the battery cell 1 can be suppressed. Fig. 4 shows only one turn of the fastening cord 32 wound around the fixing member 31, and it should be noted that more than one turn of the fastening cord 32 may be wound around the fixing member 31. When the fastening rope 32 is wound around the fixing member 31 by more than one turn, all the fastening ropes 32 can pass through the locking buckle 33 (i.e., all the fastening ropes 32 are disposed between the locking member 332 and the bottom wall 333) and be fixed, and a part of the fastening ropes can also pass through the locking buckle 33, as long as the fastening ropes 32 are not wound or loosened when being stressed.

Fig. 2 and 3 show the case where the lock catch 33 is provided on the front end beam 22a, and in some embodiments, the lock catch 33 may be provided on other portions of the fastening cord 32, for example, the fastening cord 32 near the rear end beam 22b, to further secure the fastening cord 32.

According to some embodiments of the present application, optionally, referring to fig. 5, the bottom wall 333 of the catch 33 is in face contact with the fixture 310.

Compared with the case that the fastening cord 32 is in direct line contact with the fixing member 310, the contact area with the fixing member 310 is increased by the contact of the bottom wall 333 of the lock catch 33 with the surface of the fixing member 310, so that the friction force is increased, and the lock catch 33 is better restricted from moving along the circumferential direction of the fastening cord 32 due to the expansion force of the battery cell 1.

The bottom wall 333 of the catch 33 may be brought into face contact with the fixing member 310 by shaping the fixing member 310. For example, as shown in fig. 3, when viewed from the third direction Z (the height direction of the case 2), the portion of the fixing member 310 in contact with the bottom wall 333 of the catch 33 has a D-shaped cross section, and the straight side of the D-shape is parallel to the bottom wall of the bottom wall 333 of the catch 33 and perpendicular to the first direction Y, so that the bottom wall 333 of the catch 33 is in surface contact with the fixing member 310. Further, the sectional shape is not limited to the D-shape, as long as the fixing member 310 has a side parallel to the bottom wall 333 of the lock catch 33 and perpendicular to the first direction Y as viewed from the third direction Z.

According to some embodiments of the present application, optionally, with reference to fig. 4-9, retaining member 332 further comprises: bolt 3321 and lock nut 3322. The pressing plate 331 is provided with a through hole, and a bolt 3321 is provided to the bottom wall 333 and coupled with a lock nut 3322 through the through hole to adjust a distance between the pressing plate 331 and the bottom wall 333.

Through the connection of the bolt 3321 and the lock nut 3322 as the locking member, the distance between the pressing plate 331 and the bottom wall 333 can be flexibly adjusted to press and fix the fastening rope 32 between the pressing plate 331 and the bottom wall 333, thereby avoiding the situation that the fastening rope 32 cannot be fixed between the pressing plate 331 and the bottom wall 333 due to installation errors caused when the fastening rope 32 is arranged between the bottom wall 333 and the pressing plate 331, manufacturing errors of the buckle 33, and the like.

Specifically, in some embodiments, the bolt 3321 may be fixed on a side of the bottom wall 333 close to the pressing plate 331, the bolt 3321 is connected to the lock nut 3322 through a through hole on the pressing plate 331, so as to adjust the blocking position between the pressing plate 331 and the bottom wall 333, and the bolt 3321 and the bottom wall 333 may be integrally formed, or may be fixed together by welding, riveting, or the like after being formed separately. In other embodiments, a through hole may be formed in the bottom wall 333, and the bolt 3321 is connected to the lock nut 3322 after passing through the through holes of the bottom wall 333 and the pressure plate 331, and a counter bore may be formed in a side of the bottom wall 333 away from the pressure plate 331 (outside the bottom wall 333) to receive an end of the bolt 3321 therein, so as to increase a contact area between the bottom wall 333 of the lock catch 33 and the fixing member 310, provide a greater friction force, and further better limit the circumferential movement of the lock catch 33 along the fastening rope 32 due to the expansion force of the battery cell 1.

According to some embodiments of the present application, optionally, with reference to fig. 10, the fastening device 3 comprises a catch 34. The buckle 34 includes a first buckle portion 341 and a second buckle portion 342 which are adjacently disposed. The first locking portion 341 receives an end portion of the fastening cord therein, and the second locking portion 342 receives the other portion of the fastening cord 32 therein to fix the end portion of the fastening cord 32 and the other portion of the fastening cord.

In mounting the fastening cord 32, first, one end portion of the fastening cord 32 is passed through the first catching portion 341, then, the fastening cord 32 is wound on the fastening pieces 310 respectively provided on the two end beams 22, and then, the other end portion of the fastening cord 32 is passed through the second catching portion 342 of the buckle 34, thereby completing the winding of one turn of the fastening cord 32. In this way, the first locking portion 341 receives one end portion of the fastening cord 32 therein, and the second locking portion 342 receives the other portion of the fastening cord 32 except for the one end portion. The end of the securing cord 32 is secured to the remainder of the securing cord 32 by the catch 34, thereby avoiding the situation where the securing cord 32 is wound loose and is unable to provide tension.

If more than one loop of the fastening rope 32 is wound on the fixing member 310, the sizes of the first clamping portion 341 and the second clamping portion 342 may be adjusted accordingly, for example, only the end portion of the fastening rope 32 is received in the first clamping portion 341, the second clamping portion 342 receives all other portions of the fastening rope 32, or only a portion of the fastening rope 32 except the end portion of the fastening rope 32 may be received in the second clamping portion 342, as long as the fastening rope 32 is fixed by the buckle 34, the situation that the fastening rope 32 is wound and loosened so that the tightening force cannot be provided can be avoided. Fig. 4 shows a case where the two ends of the fastening cord 32 are provided with the catches 34, respectively, and only one end of the fastening cord 32 may be provided with one catch 34. In order to provide a more stable fixation of the buckle 34, after the buckle 34 is disposed on the fastening cord 32, the first and second clamping portions 341 and 342 may be adjusted in size by a tool to further clamp the end of the fastening cord 32 with the other portion of the fastening cord 32.

According to some embodiments of the present application, optionally, referring to fig. 11 and 12, the fixing member 310 is provided with a flange 3111 at an end portion of the case 2 distant from the end beam 22 in the height direction (third direction Z) to restrict the fastening cord 32 from being detached from the fixing member 310. In addition, a slot 3112 may be provided in the fixture 310 to further confine the fastening cord 32 within the slot.

According to some embodiments of the present application, optionally, referring to fig. 1 and 3, the fastening device 3 includes a plurality of sets of fixing assemblies 31, and the fixing members 310 of the plurality of sets of fixing assemblies 31 are disposed on the end beam 22 at intervals along the second direction X. In the plurality of sets of fixing assemblies 31, the tightening force of the fastening rope 32 wound on the fixing member 310 located at the middle of the end beam is greater than the tightening force of the fastening rope 32 wound on the fixing members 310 located at both sides in the second direction X.

The end beam 22 is usually connected to the side member 21 at both ends thereof in the second direction X by welding or the like. I.e. the central part of the end beam 22 has no fixed structure. Therefore, the central portion of the end beam 22 is subjected to a large force and deformation when the battery cell 1 expands. By adjusting the length of the fastening cord 32, the tightening force of the fastening cord 32 wound around the fixing member 310 located in the middle can be made greater than the tightening force of the fastening cord 32 wound around the fixing members 310 located on both sides, so that the influence of the expansion of the battery cell 1 on the end beam 22 can be more effectively suppressed. Fig. 1 and 3 show a case where the fastening device 3 includes 5 sets of fixing members 31. However, the number of the groups of the fixing members 31 and the tension of the fastening rope 32 of each group of the fixing members 31 may be set according to the force applied to the end beam 22.

According to some embodiments of the present application, optionally, referring to fig. 13, the fastening cord 32 is wound across a plurality of fixing pieces 310 provided in the width direction (second direction X) of the case 2. And, in the width direction of the cabinet 2, the number of turns of the fastening cord 32 wound on the fixing member 310 located at the middle of the end beam is greater than the number of turns of the fastening cord 32 wound on the fixing members 310 located at both sides. As described above, generally, the center portion of the end beam 22 has no fixed structure, that is, the center portion of the end beam 22 is generally subjected to a large force and deformation when the battery cell 1 expands. The number of turns of the fastening rope wound on the fixing piece positioned in the middle of the end beam is increased, so that the tension force of the fastening rope wound on the fixing piece positioned in the middle of the end beam is greater than the tension force of the fastening rope wound on the fixing pieces positioned on the two sides. Therefore, stress on the middle part of the end beam when the battery cell expands can be offset, influence of expansion of the battery cell on the middle part of the end beam is inhibited, stress on the end beam 22 in the second direction X is balanced, and therefore the end beam 22 is not prone to deformation.

According to some embodiments of the present application, optionally, referring to fig. 13, in the second direction X of the cabinet 2, the fastening string 32 wound on the fixing members 310 located at both sides is also wound on the fixing member 310 located at the middle.

As shown by the dotted lines in fig. 13, the first loop of fastening rope 32A is wound around the first to fifth fixing members 310A to 310E, the second loop of fastening rope 32B is wound around the second to fourth fixing members 310B to 310D, and the third loop of fastening rope 32C is wound around the third fixing member 310C. Thus, the third fixing member 310C located at the middle portion is wound with: a first loop of fastening cord 32A, a second loop of fastening cord 32B, and a third loop of fastening cord 32C. That is, the first loop of fastening rope 32A and the second loop of fastening rope 32B on the first fixing member 310A and the fifth fixing member 310E, and the fourth fixing member 310D, which are located on both sides, are also wound around the third fixing member 310C, which is located in the middle. With this arrangement, in the third fixing member 310C located in the middle, in addition to the tightening force of the third loop of the fastening rope 32C, the tightening force of the first loop of the fastening rope 32A wound around the first and fifth fixing members 310A, 310E located on both sides and the tightening force of the second loop of the fastening rope 32B wound around the second and fourth fixing members 310B, 310D are superimposed, so that the tightening force of the fastening rope 32 wound around the third fixing member 310C located in the middle is greater than the tightening force of the fastening rope 32 wound around the fixing members (for example, the first, second, fourth and fifth fixing members 310A, 310B, 310D, 310E) located on both sides. Thus, the influence of the expansion of the battery cell 1 on the case 2 can be effectively suppressed. In addition, the first loop of the fastening rope 32A and the second loop of the fastening rope 32B on the middle third fixing piece fixing part 310C can also be fixed with the third loop of the fastening rope 32C through the locking part 332, so that the tightening force of the first loop of the fastening rope 32A and the second loop of the fastening rope 32B and the third loop of the fastening rope 32C can be more effectively superposed.

According to some embodiments of the present application, there is also provided an electric device, including the battery according to any of the above aspects, and the battery is used for supplying electric energy to the electric device.

The powered device may be any of the aforementioned battery-powered devices or systems.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims (10)

1. A battery, comprising:

a plurality of battery cells arranged in a first direction;

the box body is provided with a containing space for containing the battery cells and comprises two side beams extending along the first direction and two end beams extending along the second direction, the side beams and the end beams are connected with each other to enclose the containing space, and the second direction is perpendicular to the first direction; and

a fastening device, the fastening device comprising: the fixing assembly comprises at least two fixing pieces which are respectively and correspondingly arranged on the two end beams; and the fastening rope is wound by at least one circle between at least two fixing pieces, and the end part of the fastening rope is fixed with other parts of the fastening rope.

2. The battery of claim 1, wherein the fastening device further comprises a latch, the latch comprises a pressing plate, a locking member and a bottom wall, the pressing plate and the bottom wall are arranged at intervals, the fastening rope is arranged between the pressing plate and the bottom wall, and the locking member is used for adjusting the distance between the pressing plate and the bottom wall to fix the fastening rope.

3. The battery of claim 2, wherein a bottom wall of the latch is in face contact with the anchor.

4. The battery of claim 3, wherein the retaining member further comprises: the pressing plate is provided with a through hole, and the bolt is arranged on the bottom wall and is connected with the locking nut through the through hole so as to adjust the distance between the pressing plate and the bottom wall.

5. The battery according to any one of claims 1 to 4, wherein the fastening device comprises a buckle, the buckle comprises a first clamping part and a second clamping part which are adjacently arranged, the first clamping part accommodates the end part of the fastening rope, and the second clamping part accommodates other parts of the fastening rope so as to fix the end part of the fastening rope with the other parts of the fastening rope.

6. The battery according to any one of claims 1 to 4, wherein the fixing member is provided with a flange at an end portion of the fixing member away from the end beam in a height direction of the case to restrict the fastening cord from being detached from the fixing member.

7. The battery according to any one of claims 1-4, wherein the fastening device comprises a plurality of groups of fixing assemblies, and fixing pieces of the plurality of groups of fixing assemblies are arranged on the end beam at intervals along the second direction;

in the plurality of groups of fixing assemblies, in the second direction, the tension force of the fastening rope wound on the fixing piece positioned in the middle of the end beam is greater than the tension force of the fastening rope wound on the fixing pieces positioned on both sides.

8. The battery according to claim 7,

the fastening ropes cross the plurality of fixing pieces arranged along the second direction to be wound, and in the second direction, the number of turns of the fastening ropes wound on the fixing pieces positioned in the middle of the end beam is larger than the number of turns of the fastening ropes wound on the fixing pieces positioned on the two sides.

9. The battery according to claim 7,

and in the second direction, the fastening ropes wound on the fixing pieces positioned on the two sides of the end beam are also wound on the fixing piece positioned in the middle.

10. An electrical device comprising a battery as claimed in any one of claims 1 to 9 for providing electrical energy.

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