Patent Description:
During fixing of a battery module, multiple battery cells are fixed mainly through a front end plate and a back end plate, and then the battery module is fixed by binding and fixing with a band.

In the related art, a battery cell may expand or shrink, which may result in expansion or shrinkage of the battery module, and thus after long-term use, the band may be easy to fall off.

A fixing assembly for a battery module and a battery pack are provided in implementations of the present disclosure, which solve a problem that an existing steel band is easy to fall off.

A fixing assembly for a battery module is provided in implementations of the present disclosure. The fixing assembly for the battery module may include an end plate, a fixing member, and a first band. The end plate may be configured to abut against an outer sidewall of the battery module and provided with a limiting member protruding from a surface of the end plate. The fixing member may be configured to connect multiple battery modules and abut against the surface of the end plate provided with the limiting member, such that the fixing member, the limiting member, and the end plate can cooperatively define a positioning region. The first band may be configured to abut against the surface of the end plate provided with the limiting member to bind the battery module. The first band may abut against the positioning region, such that the fixing member and the limiting member cooperatively abut against the first band.

When all components in the fixing assembly for the battery module are mutually connected, the fixing member can connect the multiple battery modules and abut against the first band. The limiting member can be disposed at only one side of the positioning region, and the limiting member cooperates with the fixing member at another side of the positioning region to limit a movement of the first band relative to the end plate, which can reduce the number of limiting members on the end plate, thereby reducing costs. The fixing member and the limiting member cooperatively limit the movement of the first band relative to the end plate, which can effectively improve a situation where the first band falls off after the battery module shrinks or expands.

In some implementations of the present disclosure, the fixing assembly for the battery module may include two fixing members and a second band. The two fixing members may be respectively configured to be connected with two ends of the battery module, and the end plate may be provided with two limiting members at a same side of the end plate. One of the two limiting members, one of the two fixing members, and the end plate may cooperatively define one positioning region. The first band and the second band may be respectively configured to be adaptively connected with two positioning regions.

The fixing member and the limiting member at two sides of the positioning region can abut against the first band, and a fixing member and a limiting member at two sides of another positioning region can abut against the second band, which can avoid a situation where the first band and the second band falls off due to separation of the first band and the second band from the two positioning regions.

In some implementations of the present disclosure, the first band may be made of alloy, and the second band may be made of plastic. The first band is adaptively connected with the positioning region close to an electrode of the battery module.

The second band away from the electrode of the battery module may be made of plastic, which can reduce manufacturing costs.

In some implementations of the present disclosure, the end plate may have a chamfer recessed toward the battery module at each of two opposite ends of the end plate, and the end plate is provided with the limiting member at each of the two chamfers.

In some implementations of the present disclosure, the end plate may have a chamfer recessed toward the battery module at each of two opposite ends of the end plate, and the end plate is provided with the limiting member at only one chamfer.

In some implementations of the present disclosure, the limiting member may be elongated, and the limiting member may extend in a direction parallel to a direction in which the first band extends.

In some implementations of the present disclosure, the limiting member may include multiple protrusions spaced apart from one another, and each of the multiple protrusions may abut against the first band after the first band is connected with the end plate.

In some implementations of the present disclosure, in a direction perpendicular to the end plate, a height of the limiting member may be equal to a thickness of the first band.

In some implementations of the present disclosure, the fixing member may include a main body and at least one connecting portion connected with the main body, and each of the at least one connecting portion may be configured to be connect two adjacent battery modules in the multiple battery modules. The main body, the limiting member, and the end plate may cooperatively define the positioning region.

In some implementations of the present disclosure, the main body may be elongated, and the connecting portion is connected with one end of the main body, such that the main body is in contact with the surface of the end plate and the connecting portion is in contact with the battery modules.

In some implementations of the present disclosure, a width of the positioning region may be adapted to a width of the first band, such that both the limiting member and the fixing member abut against the first band.

In some implementations of the present disclosure, the main body may be a bent strip-shaped sheet, and at least part of the main body abuts against the first band after the fixing member is connected with the battery module.

A battery pack is provided in the present disclosure. The battery pack may include multiple battery modules, multiple end plates, a fixing member, and multiple first bands. An end plate may abut against an end portion of a battery module and may be provided with a limiting member at a side of the end plate away from the battery module. The fixing member may abut against the side of the end plate away from the battery module and be connected with the multiple battery modules. The fixing member, the limiting member, and the end plate may cooperatively define a positioning region. A first band may be configured to bind the battery module. The first band may be adapted to the positioning region, such that the fixing member and the limiting member can cooperatively limit a movement of the first band.

The positioning region for limiting the first band is cooperatively defined by the fixing member, the limiting member, and the end plate, and the movement of the first band relative to the end plate is limited by the positioning region. After the battery pack shrinks and expands, the fixing member and the limiting member can make the first band and the end plate relatively fixed to prevent the first band from falling off. In the present disclosure, the fixing member can connect the multiple battery modules and abut against the first band, so as to avoid disposing more limiting members on the end plate, thereby reducing manufacturing costs.

In some implementations of the present disclosure, the battery pack may include multiple second bands and two fixing members. The two fixing members may be respectively connected with two opposite ends of the battery module. The end plate may be provided with two limiting members at a same side of the end plate. One of the two fixing members, one of the two limiting members, and the end plate may cooperatively define the positioning region. The first band may be adaptively connected with the positioning region close to an electrode of the battery module. A second band may be adaptively connected with another positioning region. Each of the multiple first bands may be made of alloy, and each of the multiple second bands may be made of plastic.

In some implementations of the present disclosure, the end plate may have a chamfer recessed toward the battery module at each of two opposite ends of the end plate, and the limiting member is provided at the chamfer.

In order to explain technical solutions in implementations of the present disclosure more clearly, the following will give a brief introduction to accompanying drawings which are needed to be used in description of implementations or the related art. It should be understood that followings accompanying drawings only illustrate some implementations of the present disclosure and thus should not be considered as limitation to the scope. For those of ordinary skill in the art, other accompanying drawings can be obtained according to these accompanying drawings without creative efforts.

Reference signs: <NUM>-battery pack; <NUM>-positioning region; <NUM>-battery module; <NUM>-end plate; <NUM>-limiting member; <NUM>-fixing member; <NUM>-main body; <NUM>-connecting portion; <NUM>-first band; <NUM>-second band.

In order to make a purpose, a technical solution, and an advantage of implementations of the present disclosure clearer, the technical solution of implementations of the present disclosure will be described clearly and completely in conjunction with accompanying drawings in implementations of the present disclosure. Obviously, described implementations are part of implementations of the present disclosure, not all of implementations. Generally, the assemblies of implementations of the present disclosure, which are described and illustrated in the accompanying drawings herein, may be arranged and designed in a variety of different configurations.

Therefore, the detailed description of implementations of the present disclosure provided in the accompanying drawings is not intended to limit the claimed scope of the present disclosure, but illustrates only the selected implementations of the present disclosure. All other implementations, obtained by those of ordinary skill in the art in light of implementations of the present disclosure without inventive efforts, will all fall within the claimed scope of the present disclosure.

It should be noted that similar signs and letters indicate similar items in the following accompanying drawings, and therefore, once an item is defined in an accompanying drawing, it is not necessary to further define or explain it in the subsequent accompanying drawings.

In the description of implementations of the present disclosure, it should be understood that orientation or positional relations indicated by terms such as "up", "down", etc., are orientation or positional relations based on the accompanying drawings, or orientation or positional relations in which the application product is placed conventionally in use, or orientation or positional relations commonly understood by those skilled in the art, only for facilitating description of the present disclosure and simplifying the description, rather than indicating or implying that the referred devices or elements must be in a particular orientation or constructed or operated in the particular orientation, and therefore they should not be construed as limiting the present disclosure.

In addition, terms such as "first", "second", "third", etc., are used only for distinguishing illustration, and should not be construed as indicating or implying relativity importance.

In the description of the present disclosure, it should be indicated that unless otherwise expressly specified or defined, terms such as "disposed", "arranged", "provided with", "mount", "couple", and "connect" should be understood broadly, and for example, a fixed connection, or a detachable connection, or an integrated connection; and may be a direct connection, or an indirect connection via an intermediate medium, or may be an internal communication between two elements. The specific meanings of the above-mentioned terms in the present disclosure could be understood by those of ordinary skill in the art according to specific situations.

<FIG> is a schematic structural diagram of a battery pack <NUM> provided in implementations of the present disclosure. Referring to <FIG>, the battery pack <NUM> is provided in implementations of the present disclosure. The battery pack <NUM> may include four battery modules <NUM>. It should be noted that in other implementations of the present disclosure, the battery pack may include two, three, five, or more battery modules <NUM>, and the number of battery modules <NUM> in the battery pack <NUM> is not limited in the present disclosure. Accordingly, the number of battery cells contained in each battery module <NUM> is also not limited in the present disclosure.

In the present disclosure, the battery pack <NUM> may mainly include the battery modules <NUM>, an end plate <NUM>, a fixing member <NUM>, and a first band <NUM>. The battery module <NUM> may be implemented as multiple battery modules <NUM>, and the end plate <NUM> may be implemented as multiple end plates <NUM>. In implementations, the number of the multiple battery modules <NUM> may correspond to the number of the multiple end plates <NUM>, and each end plate <NUM> may abut against an outer sidewall of one battery module <NUM>. Optionally, the battery module <NUM> has an outer sidewall at the front end and an outer sidewall at the back end, and the outer sidewall at the front end abuts against one end plate <NUM> and the outer sidewall at the back end abut against one end plate <NUM>. In implementations, for example, the end plate <NUM> abuts against the front end of the battery module <NUM>.

The fixing member <NUM> is mainly used to connect the multiple battery modules <NUM>. In other words, the multiple battery modules <NUM> each are connected with the fixing member, such that the multiple battery modules <NUM> are connected in series to form the battery pack <NUM>. When the multiple battery modules <NUM> are connected with the fixing member <NUM>, the fixing member <NUM> abuts against the multiple end plates <NUM>. For each of the multiple end plates <NUM>, the end plate <NUM> is provided with a limiting member <NUM> protruding from the end plate <NUM>, and the limiting member <NUM>, a side of the fixing member <NUM>, and the end plate <NUM> cooperatively define a positioning region <NUM> (as illustrated in <FIG>). The first band <NUM> is mainly used to bind multiple battery cells, and one battery module <NUM> corresponds to one first band <NUM>. The first band <NUM> wraps around the battery module <NUM> to bind the battery module <NUM>. The first band <NUM> is annularly disposed at the outside of the battery module <NUM> and the end plate <NUM> to bind, and the first band <NUM> is adapted to the positioning region <NUM>, such that the limiting member <NUM> and the fixing member <NUM> cooperatively limit the first band <NUM> to avoid a movement of the first band <NUM>.

Reference can be made to <FIG>, which is partial schematic structural diagram of a battery pack <NUM> provided in implementations of the present disclosure, and no first band <NUM> is illustrated in <FIG>. In implementations, the end plate <NUM> may be plate-shaped, the end plate <NUM> may abut against an end portion of the battery module <NUM>, and the end plate <NUM> may be provided with the limiting member <NUM>. In implementations, for a better fit of the end plate <NUM> and the battery module <NUM>, the end plate <NUM> may have a chamfer recessed toward the battery module <NUM> at each of two opposite sides of the end plate <NUM>. In other words, the two opposite sides of the end plate <NUM> are arc-shaped, through which the end plate <NUM> fits the battery module <NUM> at the chamfer of the end plate <NUM>.

In implementations, the limiting member <NUM> may be disposed at the chamfer of the end plate <NUM>. The first band <NUM> abuts against the limiting member <NUM>. The limiting member <NUM> at the chamfer can limit the movement of the first band <NUM> from two directions.

Optionally, in implementations, the end plate <NUM> may be provided with the limiting member <NUM> at each of two chamfers. It can be understood that in other implementations, the end plate <NUM> may be provided with the limiting member <NUM> only at one chamfer.

Alternatively, in other implementations of the present disclosure, the end plate <NUM> may have no chamfer. Accordingly, the limiting member <NUM> may also be not disposed at the chamfer, and the limiting member <NUM> may be disposed at other locations such as the middle of end plate <NUM>.

In implementations, the limiting member <NUM> is elongated, and the limiting member <NUM> may be integrated with the end plate <NUM>. When the first band <NUM> is connected with the end plate <NUM>, the limiting member <NUM> may extends in a direction parallel to a direction in which the first band <NUM> extends. In other words, when the first band <NUM> is connected with the end plate <NUM>, the limiting member <NUM> may be parallel to the first band <NUM>. One of functions of the limiting member <NUM> is to avoid the movement of the first band <NUM>. The limiting member <NUM> is parallel to the first band <NUM>, such that there are multiple contact points between the limiting member <NUM> and the first band <NUM>, or the limiting member <NUM> is in line contact or in surface contact with the first band <NUM>, which increases a limiting ability of the limiting member <NUM> to the first band <NUM>.

Optionally, in implementations of the present disclosure, in a direction perpendicular to the end plate <NUM>, a height of the limiting member <NUM> may be equal to a thickness of the first band <NUM>. When the first band <NUM> is in contact with the limiting member <NUM>, a top of the limiting member <NUM> does not exceed the surface of the first band <NUM>, which avoids that an excessive space is occupied by the top of the limiting member <NUM> and realizes a batter limiting effect.

It should be noted that in other implementations of the present disclosure, in the direction perpendicular to the end plate <NUM>, the height of the limiting member <NUM> may also be larger than the thickness of the first band <NUM>; or in the direction perpendicular to the end plate <NUM>, the height of the limiting member <NUM> may also be smaller than the thickness of the first band <NUM>. Accordingly, the limiting member <NUM> may extend in the direction which is not parallel to the direction in which the first band <NUM> extends. For example, a certain angle may be defined between an extension direction of the limiting member <NUM> and an extension direction of the first band <NUM>, as long as the first band <NUM> can be accommodated in the positioning region <NUM> which is defined between the limiting member <NUM> and the fixing member <NUM>.

In addition, in other implementations of the present disclosure, the limiting member <NUM> may be in other shapes, such as multiple protrusions spaced apart from one another. When the first band <NUM> is connected with the end plate <NUM>, the multiple protrusions each abut against the first band <NUM>. The protrusion may be, for example, implemented as one, two or more protrusions. Accordingly, the limiting member <NUM> may be connected with the end plate <NUM> by welding or other manners.

Reference can be made to <FIG> again, the limiting member <NUM> and two opposite ends of the fixing member <NUM> define the positioning region <NUM> on the end plate <NUM>, and a width of the positioning region <NUM> is adapted to a width of the first band <NUM>, such that the limiting member <NUM> and the fixing member <NUM> both abut against the first band <NUM>, which avoids a displacement and a movement of the first band <NUM>.

Reference can be made to <FIG>, which is a schematic structural diagram of a fixing member <NUM> provided in implementations of the present disclosure. The fixing member <NUM> is mainly used to connect the multiple battery modules <NUM> and abut against one side of the first band <NUM>.

In implementations, the fixing member <NUM> may include a main body <NUM> and multiple connecting portions <NUM> connected with the main body <NUM> at intervals. Each of the multiple connecting portions <NUM> may be configured to connect two adjacent battery modules <NUM>. Two opposite ends of the connecting portion <NUM> may be connected with two battery modules <NUM> respectively, and the two battery modules <NUM> are connected with each other through the connecting portion <NUM>. The main body <NUM> can abut against the first band <NUM> to avoid the movement of the first band <NUM>, and the main body <NUM> can also connect the multiple battery modules <NUM> to avoid displacements among the multiple battery modules <NUM>. In detail, when the multiple battery modules <NUM> are connected with one another through the multiple connecting portions <NUM>, one end of each of the multiple battery modules <NUM> can abut against the main body <NUM>, such that the multiple battery modules <NUM> are flush with one side of the main body <NUM>, and end surfaces of the multiple battery modules <NUM> are almost on the same plane, which avoids mutual dislocations or movements among the multiple battery modules <NUM>.

In implementations of the present disclosure, the number of connecting portions <NUM> may be set according to the number of battery modules <NUM>. For example, if there are two battery modules <NUM>, one connecting portion <NUM> is disposed, and if there are three battery modules <NUM>, two connecting portions <NUM> are disposed to connect the three battery modules <NUM>. The connecting portion <NUM> may be connected with the battery module <NUM> by welding, bolting, etc..

In implementations, the main body <NUM> may be elongated. When the fixing member <NUM> is connected with the battery module <NUM>, the main body <NUM> may be parallel to the first band <NUM>, such that the first band <NUM> can be in surface contact with the main body <NUM>, which makes the fixing member <NUM> and the limiting member <NUM> have a relatively great limiting effect on the first band <NUM>.

It should be noted that in other implementations of the present disclosure, the main body <NUM> may be in other shapes, for example, the main body <NUM> is a bent strip-shaped sheet. when the fixing member <NUM> is connected with the battery module <NUM>, at least part of the main body <NUM> abuts against the first band <NUM>.

In implementations, the connecting portion <NUM> may be connected with an end portion of the main body <NUM>, the main body <NUM> may fit the surface of the end plate <NUM>, the connecting portion <NUM> may fit the battery module <NUM>, such that a space between the fixing member <NUM> and the battery module <NUM> can be reduced.

In implementations, the thickness of the main body <NUM> may be almost equal to the thickness of the first band <NUM>. The main body <NUM> may be in surface contact with the end plate <NUM>. It should be noted that in other implementations of the present disclosure, the thickness of the main body <NUM> may also be larger or smaller than the thickness of the end plate <NUM>. Accordingly, the main body <NUM> may be in other shapes, and the main body <NUM> may be in contact with the end plate <NUM> in a manner of multi-point contact.

As mentioned above, the limiting member <NUM> may be parallel to the main body <NUM> of the fixing member <NUM>, such that the limiting member <NUM>, the main body <NUM>, and the end plate <NUM> define one rectangular positioning region <NUM>. In implementations, the first band <NUM> is also rectangular, such that the limiting member <NUM> and the main body <NUM> both abut against the first band <NUM> in a manner of line contact or surface contact. It can be understood that in other implementations of the present disclosure, the first band <NUM> may be bent, and when the bent band is accommodated in the rectangular positioning region <NUM>, the limiting member <NUM> and the main body <NUM> both abut against the first band <NUM> in the manner of multi-point contact, which can also limit the movement of the first band <NUM>. Alternatively, in other implementations of the present disclosure, the limiting member <NUM> is not parallel to the main body <NUM> of the fixing member <NUM>, the limiting member <NUM>, the main body <NUM>, and the end plate <NUM> cooperatively define one positioning region <NUM>, and the first band <NUM> may be bent. When the first band <NUM> is accommodated in the bent positioning region <NUM>, the limiting member <NUM> and the main body <NUM> both abut against the first band <NUM> in the manner of line contact or surface contact, which has relatively great limiting effect. Alternatively, the first band <NUM> is rectangular, and when the first band <NUM> is accommodated in the bent positioning region <NUM>, the limiting member <NUM> and the main body <NUM> both abut against the first band <NUM> in the manner of multi-point contact, which can also limit the movement of the first band <NUM>.

Reference can be made to <FIG>, which is a local schematic diagram of a battery pack <NUM> provided in implementations of the present disclosure. In implementations, the battery pack <NUM> further includes a second band <NUM>.

In implementations, the end plate <NUM> may be provided with two limiting members <NUM> spaced apart from each other. The battery pack <NUM> may include two fixing members <NUM>. The two fixing members <NUM> may be connected with two ends of the battery module <NUM> respectively. In other words, one fixing member <NUM> is configured to be connected with one end of the battery module <NUM>, another fixing member <NUM> is configured to be connected with another end of the battery module <NUM>.

Accordingly, the two limiting members <NUM>, the two fixing members <NUM>, and the end plate <NUM> cooperatively define two positioning regions <NUM>. The first band <NUM> can be adaptively connected with one of the two positioning regions <NUM>, and the second band <NUM> can be adaptively connected with another of the two positioning regions <NUM>.

In implementations, the first band <NUM> may be adaptively connected with one of the two positioning regions <NUM> close to an electrode of the battery module <NUM>, and the second band <NUM> may be adaptively connected with another of the two positioning regions <NUM> away from the electrode of the battery module <NUM>.

In implementations of the present disclosure, the first band <NUM> may be made of alloy, such as an aluminum alloy. The second band <NUM> may be made of plastic, such as nylon. During manufacturing of the battery pack <NUM>, an end of battery module <NUM> away from the electrode will be filled with various adhesive agents or adhesive glues. Therefore, the battery module <NUM> can be fastened with the cooperation of the adhesives and the second band <NUM> made of plastic, which can save manufacturing costs of the second band <NUM>, thereby reducing the weight of the battery pack <NUM>. Since the end of the battery module <NUM> close to the electrode is not filled materials such as the adhesive gules, etc., the first band <NUM> made of alloy can have a relatively great fastening effect.

It should be noted that in other implementations of the present disclosure, the first band <NUM> may also be made of other alloys, and accordingly, the second band <NUM> may also be not limited to be made of nylon. Alternatively, in other implementations of the present disclosure, the second band <NUM> may also be made of alloy.

Optionally, in implementations of the present disclosure, the first band <NUM> and the second band <NUM> have the same size. It should be noted that in other implementations of the present disclosure, the second band <NUM> and the second band <NUM> may have different shapes and sizes. Accordingly, the two positioning regions <NUM> may also have different shapes and sizes, and limiting members <NUM> constituting the two positioning regions <NUM> may also have different shapes and sizes.

It should be noted that in other implementations of the present disclosure, the end plate <NUM> may only be provided with one limiting member <NUM>. Accordingly, the limiting member <NUM> and the fixing member <NUM> define one positioning region <NUM> for adapting to the first band <NUM>.

The battery pack <NUM> provided in implementations of the present disclosure at least includes following advantages.

The positioning region <NUM> for limiting the first band <NUM> is cooperatively defined by the fixing member <NUM>, the limiting member <NUM>, and the end plate <NUM>, and the movement of the first band <NUM> relative to the end plate <NUM> is limited by the positioning region <NUM>. After the battery pack <NUM> shrinks or expands, the positioning region <NUM> can make the first band <NUM> and the end plate <NUM> relatively fixed to prevent the first band <NUM> from falling off. In the present disclosure, the fixing member <NUM> can connect the multiple battery modules <NUM> and abut against the first band <NUM>, so as to avoid disposing more limiting members <NUM> on the end plate <NUM>, thereby reducing manufacturing costs.

Reference can be made to <FIG> together, and a fixing assembly for a battery module is further provided in implementations of the present disclosure, which is mainly configured to connect the multiple battery modules <NUM> to constitute the battery pack <NUM>.

The fixing assembly for the battery module includes an end plate <NUM>, a fixing member <NUM>, and a first band <NUM>. As for structures and constructions of the end plate <NUM>, the fixing member <NUM>, and the first band <NUM>, reference can be made to the above illustration.

Optionally, in some implementations, the fixing assembly for the battery module may further include a second band, and as for the structure and construction of the second band <NUM>, reference can be made to the above illustration.

Accordingly, in implementations of the present disclosure, the fixing assembly for the battery module may have multiple states, such as a state where the end plate120, the fixing member <NUM> and the first band <NUM> are not connected with each other, and a state where the end plate <NUM>, the fixing member <NUM>, and the first band <NUM> are connected with the battery module <NUM> to form the battery pack <NUM>. As for the state where the end plate <NUM>, the fixing member <NUM>, and the first band <NUM> are connected with the battery module <NUM> to form the battery pack <NUM>, reference can be made to the main structures of the above battery pack <NUM>, which will not be repeated in implementations.

The fixing assembly for the battery module provided in implementations of the present disclosure at least has following advantages.

When all components in the fixing assembly for the battery module are mutually connected, the fixing member <NUM> can connect the multiple battery modules <NUM> and abut against the first band <NUM>. The fixing member and <NUM> the limiting member <NUM> cooperatively limit the movement of the first band <NUM> relative to the end plate <NUM>, which can avoid a situation where the first band <NUM> falls off after the battery module <NUM> shrinks or expands.

Optionally, a movement of the second band <NUM> can also be limited by the fixing member <NUM>, avoiding manufacturing of limiting members <NUM> for limiting the second band <NUM>, thereby reducing manufacturing costs, reducing the weight of the battery pack <NUM>, and improving mass density.

The above descriptions are only preferred implementations of the present disclosure, and are not used to limit the present disclosure. For those skilled in the art, the present disclosure may have various changes and variations.

Claim 1:
A fixing assembly for a battery module (<NUM>), comprising:
an end plate (<NUM>), the end plate (<NUM>) being configured to abut against an outer sidewall of the battery module (<NUM>) and provided with a limiting member (<NUM>) protruding from a surface of the end plate (<NUM>);
a fixing member (<NUM>), the fixing member (<NUM>) being configured to connect a plurality of battery modules (<NUM>) and abut against the surface of the end plate (<NUM>) provided with the limiting member (<NUM>), such that the fixing member (<NUM>), the limiting member (<NUM>), and the end plate (<NUM>) cooperatively define a positioning region (<NUM>); and
a first band (<NUM>), the first band (<NUM>) being configured to abut against the surface of the end plate (<NUM>) provided with the limiting member (<NUM>) to bind the battery module (<NUM>), and the first band (<NUM>) abutting against the positioning region (<NUM>), such that both the fixing member (<NUM>) and the limiting member (<NUM>) abut against the first band (<NUM>).