CN209357789U - Fixtures for battery packs - Google Patents

Abstract

The utility model discloses a fixing device of group battery, including first end plate, second end plate and first elastic component, the second end plate sets up with first end plate relatively. The first elastic assembly is disposed between the first end plate and the second end plate to provide an inward elastic force to the first end plate and the second end plate. According to the utility model discloses a fixing device of group battery through set up first elastic component between first end plate and second end plate, can improve the performance of group battery, prolongs the life of group battery.

Description

Fixtures for battery packs

technical field

The utility model relates to the technical field of batteries, in particular to a fixing device for a battery pack.

Background technique

In the related technology, batteries are nested in plastic brackets, and the plastic brackets are connected into groups by buckle connections, and gaps can be designed between batteries, or they can be stacked directly without gaps. If a gap is designed between the batteries, there is no pressure between the batteries, and the batteries can expand freely during use, but the gap will increase the space occupied by the battery pack and affect its energy density; if the gap between the batteries Stacking directly without gaps will cause the battery to expand and squeeze each other. When the pressure value is too large, it will be uncontrollable, which will lead to a decrease in battery performance and a shortened cycle life.

Utility model content

The utility model aims at at least solving one of the technical problems existing in the prior art. Therefore, the utility model is to provide a fixing device for a battery pack, which has the advantages of simple structure, can improve the performance of the battery, and can prolong its cycle life.

A fixing device for a battery pack according to an embodiment of the present invention includes: a first end plate; a second end plate disposed opposite to the first end plate; and a first elastic component disposed between the first end plate and the first end plate between the second end plates to provide an inward elastic force to the first end plate and the second end plate.

According to the fixing device of the battery pack in the embodiment of the present invention, by setting the first elastic component between the first end plate and the second end plate, under the action of the elastic force of the first elastic component, the first end plate and the second end plate The end plates have a tendency to approach each other, so that the first end plate and the second end plate can squeeze the object (such as a battery pack) between the first end plate and the second end plate, which can effectively solve the problem of traditional battery packs. The existing problems can improve the performance of the battery pack and prolong the service life of the battery pack. Moreover, the elastic deformation range of the first elastic component is limited. The active force is also relatively constant, which can ensure that the pressure exerted by the fixing device on the battery pack is within a reasonable range, so as to avoid excessive internal pressure of the battery pack, resulting in a decrease in the performance of the battery pack.

According to some embodiments of the present invention, the first elastic component includes a connecting piece and an elastic piece, and the elastic piece is connected to the first end plate or the second end plate through the connecting piece.

In some embodiments of the present invention, the elastic member includes a first elastic member and a second elastic member, and the first elastic member is connected to the second elastic member through a connecting member.

In some embodiments of the present invention, the connecting element is a metal strip.

In some embodiments of the present utility model, the elastic member is a kind of elastic body or spring.

According to some embodiments of the present utility model, it further includes a second elastic component, the first elastic component and the second elastic component are respectively arranged on different sides of the battery pack, and the second elastic component is arranged on the between the first end plate and the second end plate to provide inward elastic force to the first end plate and the second end plate.

According to some embodiments of the present invention, the fixing device of the battery pack further includes: a support plate, the first end plate is fixedly connected to the support plate, and the second end plate is slidably connected to the support plate.

In some embodiments of the present utility model, the first end plate is fixed on the support plate by riveting, welding or bonding, or connected to the support plate by threaded fasteners.

In some embodiments of the present invention, the second end plate is fixed on the support plate through a sliding assembly so that the second end plate can slide in a direction away from the first end plate.

In some embodiments of the present utility model, the sliding assembly includes a first sliding piece and a second sliding piece matched with the first sliding piece, the first sliding piece is arranged on the second end plate, The second slider is arranged on the support plate.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a sectional view of a fixing device according to an embodiment of the present invention;

2 is a cross-sectional view of a fixing device according to another embodiment of the present invention;

3 is a cross-sectional view of a fixing device according to another embodiment of the present invention;

Fig. 4 is a left side view of Fig. 3 .

Reference signs:

Fixture 1, battery pack 2,

the first end plate 10,

the second end plate 20,

The first elastic component 30, the connecting piece 31, the elastic piece 32, the first elastic piece 321, the second elastic piece 322,

the second elastic component 40,

Support plate 50, slide assembly 60, first slide 61, second slide 62, threaded fastener 70,

The third elastic component 80 .

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

The following disclosure provides many different embodiments or examples for realizing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model. Furthermore, the present invention may repeat reference numerals and/or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, various specific process and material examples are provided herein, but one of ordinary skill in the art will recognize the applicability of other processes and/or the use of other materials.

As shown in Figures 1-3, the fixing device 1 of the battery pack 2 according to the embodiment of the present invention includes a first end plate 10, a second end plate 20 and a first elastic component 30, the second end plate 20 and the first end plate One end plate 10 is oppositely arranged, and the battery pack 2 can be arranged between the first end plate 10 and the second end plate 20 . The first elastic component 30 is arranged between the first end plate 10 and the second end plate 20 to provide an inward elastic force to the first end plate 10 and the second end plate 20, for example, to provide a force to pull the second end plate 20 Pulling force towards the first end plate 10.

It can be understood that the second end plate 20 is opposite to and spaced apart from the first end plate 10 . The first elastic component 30 is located between the first end plate 10 and the second end plate 20 , and the first elastic component 30 is used to provide an inward elastic force to the first end plate 10 and the second end plate 20 . The battery pack 2 is located between the first end plate 10 and the second end plate 20 . The battery pack 2 includes at least one battery. For example, the battery pack 2 may include multiple batteries, and the multiple batteries may be stacked and arranged along the direction from the first end plate 10 to the second end plate 20 . By setting the first elastic component 30, the first end plate 10 and the second end plate 20 can apply a pulling force to the first end plate 10 and the second end plate 20, and then apply the pulling force evenly to the battery pack 2, so that the battery Each cell in Group 2 is subjected to stress.

According to the fixing device 1 of the battery pack 2 according to the embodiment of the present utility model, by setting the first elastic component 30 between the first end plate 10 and the second end plate 20, under the action of the elastic force of the first elastic component 30, the second The first end plate 10 and the second end plate 20 tend to be close to each other, so that the first end plate 10 and the second end plate 20 can form a pressing force on the battery pack 2, and each battery in the battery pack 2 is subjected to pressure effect. When the battery expands during the cycle, the generated expansion force acts on the first end plate 10 and the second end plate 20, and then is transmitted to the first elastic component 30, and the first elastic component 30 will be affected by the expansion force. become longer, the fixing device can provide a certain expansion space for the expansion of the battery pack 2, and at the same time reduce the internal stress of the battery pack caused by the expansion force, which can effectively solve the problem of the traditional battery pack caused by the expansion of each battery in it. The pressure of the battery is too large, and then the structure of the traditional battery pack is invalidated, and the cycle life is shortened, so that the performance of the battery pack 2 can be improved and the service life of the battery pack 2 can be extended. Moreover, the elastic deformation range of the first elastic component 30 is limited, and the force exerted by the first elastic component 30 on the first end plate 10 and the second end plate 20 is also relatively constant, which can ensure that the fixing device 1 exerts force on the battery pack 2. The pressure is within a reasonable range, so that the excessive internal pressure of the battery pack 2 can be avoided, resulting in a decrease in the performance of the battery pack 2 .

As shown in Figures 1-3, according to some embodiments of the present invention, both the first end plate 10 and the second end plate 20 can be formed as flat parts, and the first end plate 10 and the second end plate 20 are arranged in parallel , the battery pack 2 includes opposite first surfaces and second surfaces, the first surface is in contact with the first end plate 10 , and the second surface is in contact with the second end plate 20 . In this way, the range of action of the first end plate 10 and the second end plate 20 on the battery pack 2 can be increased, thereby improving the force balance between the first end plate 10 and the second end plate 20 on the battery pack 2 .

As shown in Figures 1-3, according to some embodiments of the present invention, the first elastic assembly 30 includes a connecting piece 31 and an elastic piece 32, and the elastic piece 32 is connected to the first end plate 10 or the second end plate through the connecting piece 31 20. It can be understood that the connecting member 31 is connected with the first end plate 10 or the second end plate 20 , and the elastic member 32 is connected with the connecting member 31 . The elastic member 32 can exert elastic force on the first end plate 10 and the second end plate 20 , so that the first end plate 10 is close to the second end plate 20 . The setting of the connecting piece 31 can facilitate the installation of the elastic piece 32 , and the type of the elastic piece 32 can be changed according to the size and pressure requirements of the battery pack 2 . In addition, by distributing the ratio of the length of the elastic member 32 and the length of the connecting member 31 to the distance between the first end plate 10 and the second end plate 20, the first elastic component 30 can also be adjusted to the first end plate 10 and the second end plate 20. The strength of the elastic force of the two end plates 20 satisfies the requirements of different types of battery packs 2 .

In some embodiments, one end of the connecting member 31 can be connected to the first end plate 10 , the other end of the connecting member 31 can be connected to one end of the elastic member 32 , and the other end of the elastic member 32 can be connected to the second end plate 20 . Thus, the connecting piece 31 can facilitate the installation of the elastic piece 32 . As another example, as shown in Figure 1, the connector 31 can include two, one end of one connector 31 is connected with the first end plate 10, the other end of the connector 31 is connected with one end of the elastic member 32, and the elastic member 32 The other end of the connecting piece 31 is connected to one end of another connecting piece 31 , and the other end of the connecting piece 31 is connected to the second end plate 20 .

As shown in FIG. 2 , in some embodiments of the present invention, the elastic member 32 may include a first elastic member 321 and a second elastic member 322 , and the first elastic member 321 is connected to the second elastic member 322 through the connecting member 31 . It can be understood that a connecting piece 31 is provided between the first elastic piece 321 and the second elastic piece 322 , and two ends of the connecting piece 31 are respectively connected with the first elastic piece 321 and the second elastic piece 322 . Thus, the elastic deformation capability of the elastic member 32 can be improved, so that the adjustment range of the first elastic component 30 can be improved.

For example, as shown in FIG. 2, there may be three connectors 31, wherein the first connector 31 is located between the first end plate 10 and the first elastic member 321, and the two ends of the first connector 31 are respectively connected to the first connector 31. One end plate 10 is connected to one end of the first elastic member 321 . The first connecting member 31 is located between the second end plate 20 and the second elastic member 322 , and two ends of the second connecting member 31 are respectively connected to the second end plate 20 and one end of the second elastic member 322 . The third connecting part 31 is located between the first elastic part 321 and the second elastic part 322, and the two ends of the third connecting part 31 are respectively connected with the other end of the first elastic part 321 and the other end of the second elastic part 322 .

In some embodiments of the present invention, the connecting member 31 may be a metal strip. For example, the connecting piece 31 may be a steel strip, an aluminum strip, or the like. Thereby, the rigidity of the connecting piece 31 can be improved, and the structural stability of the connecting piece 31 can be improved. In some embodiments of the present invention, the connecting piece 31 may be a metal rod. Thus, the metal rod can be sandwiched between the first end plate 10 and the second end plate 20, and can be used to support the first end plate 10 and the second end plate 20, so that the first end plate 10 and the second end plate 20 to keep a certain distance between. For example, it may be set so that the sum of the total length of the metal rod plus the length of the elastic member 32 in a naturally extended state is equal to or slightly smaller than the distance between the first end plate 10 and the second end plate 20 .

In some embodiments of the present invention, the elastic member 32 can be a kind of elastic body or spring. An elastic body can be a substance that deforms under the action of an external force and can return to its original shape after the external force is removed, such as rubber, sponge, foam, etc. The spring may be a coil spring, a spiral spring (spring spring) or the like. Thus, the elastic performance of the elastic member 32 can be realized, and the production cost of the elastic member 32 can also be reduced. When the spring is a scroll spring, the first end plate 10 and the second end plate 20 can apply a constant force to the battery pack by utilizing its constant force characteristics under different tensile deformations, which can improve the structural stability of the battery pack .

As shown in Figures 1-3, according to some embodiments of the present invention, the fixing device 1 of the battery pack 2 may further include a second elastic component 40, and the first elastic component 30 and the second elastic component 40 are respectively arranged on the battery pack. 2 on different sides, and the second elastic component 40 is disposed between the first end plate 10 and the second end plate 20 to provide inward elastic force to the first end plate 10 and the second end plate 20 . For example, the battery pack 2 may include a first side wall and a second side wall opposite, the first elastic component 30 may be located on the side of the first side wall away from the second side wall, and the second elastic component 40 may be located on the second side wall The side away from the first side wall.

Thus, by setting the second elastic component 40, the second elastic component 40 and the first elastic component 30 can jointly provide elastic force for the first end plate 10 and the second end plate 20, the first end plate 10, the second end plate The plate 20 receives the force from the second elastic component 40 and the first elastic component 30, and can keep the first end plate 10 and the second end plate 20 always facing each other, so that the force on the battery pack 2 can be balanced, and the battery pack can be improved. The structural stability of the battery further improves the performance of the battery pack and prolongs the service life of the battery pack.

As shown in FIGS. 1-3 , in some embodiments of the present invention, there may be multiple first elastic components 30 , and the multiple first elastic components 30 are arranged at intervals, which may be determined according to actual needs. In some embodiments of the present invention, there may be multiple second elastic components 40, and the multiple second elastic components 40 are arranged at intervals, which may be determined according to actual needs. Thus, the working range and working effect of the first elastic component 30 and the second elastic component 40 can be improved.

In some embodiments of the present invention, the first end plate 10 may be a rigid structural member, the first end plate 10 may be a metal part, or the first end plate 10 may be a non-metallic part. The second end plate 20 may be a rigid structural member, the second end plate 20 may be a metal part, or the second end plate 20 may be a non-metal part. Thereby, the structural strength of the first end plate 10 and the second end plate 20 can be improved.

As shown in Figures 3 and 4, according to some embodiments of the present utility model, the fixing device 1 of the battery pack 2 may further include a support plate 50, the first end plate 10 is fixedly connected to the support plate 50, and the second end plate 20 is slidable Connect the support plate 50 . It can be understood that the first end plate 10 is connected to the support plate 50, the first end plate 10 is stationary relative to the support plate 50, the second end plate 20 is connected to the support plate 50, and the second end plate 20 is movable relative to the support plate 50. verb: move. Thus, the support plate 50 can be used to maintain the relative arrangement of the first end plate 10 and the second end plate 20, and can realize the indirect connection between the first end plate 10 and the second end plate 20, and can improve the structural strength of the fixing device 1 and structural stability.

In some embodiments of the present invention, the first end plate 10 can be fixed on the support plate 50 by riveting, welding or bonding, or connected to the support plate 50 by threaded fasteners 70 . For example, as shown in FIG. 3 , the threaded fastener 70 may pass through the first end plate 10 and be connected to the support plate 50 . It should be noted that the connection method mentioned here is only an enumeration of the connection method between the first end plate 10 and the support plate 50, and is not a specific limitation on the fixing method between the first end plate 10 and the support plate 50. One end plate 10 and the support plate 50 can also be connected in other ways, as long as the first end plate 10 is fixed on the support plate 50 .

As shown in FIGS. 3 and 4 , in some embodiments of the present invention, the second end plate 20 can be fixed on the support plate 50 through a sliding assembly 60 so that the second end plate 20 faces away from the first end plate 10 Can slide. It can be understood that, in the direction from the first end plate 10 to the second end plate 20, the second end plate 20 can slide back and forth on the support plate 50, so that the second end plate 20 can approach or move away from the first end plate 10. The second end plate 20 is connected to the support plate 50 through a sliding assembly 60 , and the second end plate 20 is slidably connected to the support plate 50 through the sliding assembly 60 .

Therefore, by setting the sliding assembly 60, the second end plate 20 can flexibly approach or move away from the first end plate 10 under the force of the battery pack 2 and the first elastic member 321, while maintaining the connection between the battery pack and the support plate 50. The fixed relationship can further improve the overall structural stability of the battery pack, improve the performance of the battery pack and prolong the service life of the battery pack. In some embodiments, the sliding assembly 60 can be a pulley, and the sliding assembly 60 is respectively connected with the second end plate 20 and the supporting plate 50 , and the sliding assembly 60 can slide on the supporting plate 50 .

As shown in Figure 4, in some embodiments of the present utility model, the sliding assembly 60 includes a first sliding piece 61 and a second sliding piece 62 matched with the first sliding piece 61, the first sliding piece 61 is arranged on the second The end plate 20 and the second sliding member 62 are disposed on the supporting plate 50 . Thus, the relative sliding between the second end plate 20 and the supporting plate 50 can be realized through the cooperation of the first sliding member 61 and the second sliding member 62 .

In some embodiments, one of the first sliding member 61 and the second sliding member 62 may be a sliding block, and the other may be a sliding slot, the sliding block is suitable for fitting into the sliding slot, and the sliding block is suitable for moving along the sliding block. The extending direction of the groove moves back and forth, and the length of the sliding groove can define the adjustable range of the distance between the second end plate 20 and the first end plate 10 , which range can be determined according to the size and pressure requirements of the battery pack 2 .

In some other embodiments, one of the first sliding member 61 and the second sliding member 62 may be a pulley, and the other may be a slide rail, the pulley is suitable for fitting into the slide rail, and the pulley is suitable for moving along the The extension direction moves back and forth, and the length of the slide rail can define the adjustable range of the distance between the second end plate 20 and the first end plate 10 , and the range can be determined according to the size and pressure requirements of the battery pack 2 .

The fixing device 1 of the battery pack 2 according to the embodiment of the present invention will be described in detail below with reference to FIGS. 1-4 . It should be understood that the following description is only an illustration, rather than a specific limitation to the present utility model.

As shown in FIGS. 1-3 , the fixing device 1 of the battery pack 2 in the embodiment of the present utility model may include a first end plate 10, a second end plate 20, a first elastic component 30, a second elastic component 40, a third The elastic component 80 , the fourth elastic component, the support plate 50 , the sliding component 60 and the threaded fastener 70 .

Specifically, both the second end plate 20 and the first end plate 10 are formed as rectangular flat plates. The second end plate 20 is parallel to and opposite to the first end plate 10 , the second end plate 20 is spaced apart from the first end plate 10 , and the battery pack 2 is located between the first end plate 10 and the second end plate 20 . The battery pack 2 includes a plurality of batteries, and the plurality of batteries can be stacked and arranged along the direction from the first end plate 10 to the second end plate 20 . The second end plate 20 and the first end plate 10 can exert force on the battery pack 2 .

The first elastic component 30 , the second elastic component 40 , the third elastic component 80 , and the fourth elastic component are located between the first end plate 10 and the second end plate 20 , and are arranged around the battery pack 2 . Specifically, the battery pack 2 includes a first surface, a second surface and a peripheral wall, the first surface is parallel to and spaced apart from the second surface, the first surface is in contact with the first end plate 10, and the second surface is in contact with the second end plate 20 touch. The peripheral wall is located between the first plane and the second plane, and the peripheral wall includes a first side wall, a third side wall, a second side wall and a fourth side wall connected end to end in sequence, wherein the first side wall and the second side The walls are opposite and spaced apart, and the third side wall is opposite and spaced apart from the fourth side wall.

As shown in FIGS. 1-3 , the first elastic component 30 may be located on a side of the first side wall away from the second side wall, and the second elastic component 40 may be located on a side of the second side wall away from the first side wall. The third elastic component 80 may be located on a side of the third side wall away from the fourth side wall, and the fourth elastic component may be located on a side of the fourth side wall away from the third side wall. The first elastic component 30 , the second elastic component 40 , the third elastic component 80 and the fourth elastic component are all suitable for driving the second end plate 20 and the first end plate 10 to approach each other.

The structures of the first elastic component 30 , the second elastic component 40 , the third elastic component 80 and the fourth elastic component are all the same. The structure of the first elastic component 30 will be described below as an example. The first elastic assembly 30 includes two connecting pieces 31 and an elastic piece 32, the elastic piece 32 is located between the two connecting pieces 31, one end of one connecting piece 31 is connected with the first end plate 10, the other end of the connecting piece 31 One end is connected to one end of the elastic member 32 , the other end of the elastic member 32 is connected to one end of another connecting member 31 , and the other end of the connecting member 31 is connected to the second end plate 20 . There may be multiple first elastic components 30 , second elastic components 40 , third elastic components 80 and fourth elastic components.

Further, as shown in FIG. 2, the elastic member 32 may include a first elastic member 321 and a second elastic member 322, and there may be three connecting members 31, wherein the first connecting member 31 is located between the first end plate 10 and the first end plate 10. Between the elastic pieces 321 , two ends of the connecting piece 31 are respectively connected to the first end plate 10 and one end of the first elastic piece 321 . The second connecting member 31 is located between the second end plate 20 and the second elastic member 322 , and two ends of the connecting member 31 are respectively connected to the second end plate 20 and one end of the second elastic member 322 . The third connecting piece 31 is located between the first elastic piece 321 and the second elastic piece 322 , and the two ends of the connecting piece 31 are respectively connected with the other end of the first elastic piece 321 and the other end of the second elastic piece 322 .

The elastic member 32 can be a clockwork spring. The clockwork spring can provide a force of 5㎏f-2000kgf within the range of length change of 1㎜-50mm. The specific size of the clockwork spring can be designed based on the size and pressure requirements of the battery pack 2 .

As shown in FIG. 3 and FIG. 4 , the first end plate 10 and the second end plate 20 can be installed on the support plate 50 . The first end plate 10 is fixedly connected to the support plate 50 , the first end plate 10 is stationary relative to the support plate 50 , and the second end plate 20 is slidably connected to the support plate 50 . Specifically, the threaded fastener 70 can pass through the first end plate 10 and be connected to the support plate 50 . The second end plate 20 and the supporting plate 50 can be connected through a sliding assembly 60 . The sliding assembly 60 includes a first sliding member 61 and a second sliding member 62 , the first sliding member 61 is disposed on the second end plate 20 , and the first sliding member 61 can be formed as a slider disposed on the end surface of the second end plate 20 . The second sliding member 62 is disposed on the support plate 50 , and the second sliding member 62 may be formed as a slide groove disposed on the second sliding member 62 .

For example, the second slider 62 may include a first strip and a second strip, one side of the first strip is connected to the support plate 50, the first strip is perpendicular to the support plate 50, and the second strip is One side of the sheet is connected to the other side of the first strip, the second strip is perpendicular to the first strip, the second strip and the support plate 50 define a chute, and the slider can be limited to the slide It moves back and forth in the groove and along the extending direction of the chute. There can be two chute, the two chute are arranged at intervals and open toward each other, the second sliding member 62 is located between the two chute, the second sliding member 62 can be provided with two sliders, the two sliders are respectively Corresponds to a chute.

According to the fixing device 1 of the embodiment of the present utility model, the elastic member 32 can provide a relatively constant force for the second end plate 20 within a certain range of elastic deformation, and act on the surface of the battery pack 2. Forces are transmitted between the batteries, so that each battery in the battery pack 2 is subjected to pressure. In addition, the constant force provided by the elastic member 32 can ensure that the pressure exerted by the second end plate 20 on the battery pack 2 is within a reasonable range, and at the same time the second end plate 20 is fixed on the second sliding member 62 of the support plate 50, when When the battery pack 2 expands and the elastic member 32 is elongated and deformed, the second end plate 20 slides along the expansion direction of the battery pack 2, providing an expansion space for the battery pack 2, releasing the expansion stress generated by the battery pack 2, and solving the problem that the battery pack 2 is internally damaged. The problem of structural failure due to stress, thereby improving the performance of the battery pack and prolonging the service life of the battery pack.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial ", "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying No device or element must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, "plurality" means two or more, unless otherwise specifically defined.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connection, or integration; it can be mechanical connection, electrical connection, or communication; it can be direct connection or indirect connection through an intermediary, it can be the internal communication of two components or the interaction of two components relation. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first feature and the second feature through an intermediary indirect contact. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications, the scope of the present invention is defined by the claims and their equivalents.

Claims (10)

1. A fixing device for a battery pack, comprising: first end plate; The second end plate is arranged opposite to the first end plate and The first elastic component is arranged between the first end plate and the second end plate to provide inward elastic force to the first end plate and the second end plate. 2. The fixing device for a battery pack according to claim 1, wherein the first elastic component comprises a connecting piece and an elastic piece, and the elastic piece is connected to the first end plate or the first end plate through the connecting piece. Describe the second end plate. 3. The battery pack fixing device according to claim 2, wherein the elastic member comprises a first elastic member and a second elastic member, and the first elastic member is connected to the second elastic member through a connecting member . 4. The fixing device for a battery pack according to claim 3, wherein the connecting member is a metal strip. 5 . The fixing device for a battery pack according to claim 2 , wherein the elastic member is one of an elastic body or a spring. 6. The fixing device for a battery pack according to claim 1, further comprising a second elastic component, the first elastic component and the second elastic component are respectively arranged on different sides of the battery pack, And the second elastic component is disposed between the first end plate and the second end plate to provide an inward elastic force to the first end plate and the second end plate. 7. The battery pack fixing device according to any one of claims 1-6, further comprising: A support plate, the first end plate is fixedly connected to the support plate, and the second end plate is slidably connected to the support plate. 8. The battery pack fixing device according to claim 7, wherein the first end plate is fixed on the support plate by riveting, welding or bonding, or is connected to the support plate by a threaded fastener plate. 9. The fixing device of the battery pack according to claim 7, wherein the second end plate is fixed on the support plate through a sliding assembly so that the second end plate faces away from the first end plate direction to swipe. 10. The fixing device for a battery pack according to claim 9, wherein the sliding assembly comprises a first sliding piece and a second sliding piece matched with the first sliding piece, and the first sliding piece It is arranged on the second end plate, and the second sliding piece is arranged on the support plate.