TECHNICAL FIELD

The present disclosure relates to the field pf battery, and more specifically relates to a battery pack and a device.

BACKGROUND

A battery pack generally arranges a battery module in a single layer manner. When the electrical requirements of electrical device (such as electric vehicles) are relatively high (for example, increasing endurance), the battery pack needs to make full use of a limited height space in a Z direction, and if necessary, arranges the battery modules in a double layer manner. Since the battery modules in double-layer need to be stacked in the Z direction, the supporting stability of the battery modules in double-layer becomes very important.

SUMMARY

In view of the problem existing in the background, an object of the present disclosure is to provide a battery pack and a device comprising the battery pack, the battery pack can arrange battery modules in a double-layer manner and improve the supporting stability of the battery modules in double-layer.

In order to achieve the above object, in one respect, the present disclosure provides a battery pack which comprises a double-layer battery module bracket, an upper-layer battery module, a lower-layer battery module and a supporting mechanism. The double-layer battery module bracket comprises an upper plate; a lower fixing member positioned below the upper plate and supporting the upper plate, the lower fixing member and the upper plate are configured to enclose a lower accommodating space; an upper fixing member positioned above the lower fixing member and fixed to the upper plate, the upper fixing member and the upper plate are configured to enclose an upper accommodating space, a projection of a lower surface of the upper fixing member and a projection of an upper surface of the lower fixing member in a Z direction at least partially overlap; and a fastener passing through the upper fixing member, the upper plate and the lower fixing member along the Z direction within a range in which the projections in the Z direction overlap, a lower portion of the fastener exposed from the lower fixing member is fixed on the supporting mechanism; the upper-layer battery module is accommodated in the upper accommodating space and supported on the upper plate; the lower-layer battery module is accommodated in the lower accommodating space; the supporting mechanism supports the lower-layer battery module and the lower fixing member.

In an embodiment, a periphery edge of the upper plate has a first side along an X direction; the lower fixing member comprises a first lower fixing member; the upper fixing member comprises a first upper fixing member, the first upper fixing member is positioned at the first side of the periphery edge of the upper plate, the first upper fixing member corresponds to the first lower fixing member; the first upper fixing member is positioned above the first lower fixing member and the first upper fixing member is staggered along a Y direction with respect to the first lower fixing member, such that a projection of a lower surface of the first upper fixing member and a projection of an upper surface of the first lower fixing member in the Z direction partially overlap, the fastener passes through the first upper fixing member and the first lower fixing member along the Z direction within a range in which the projections in the Z direction overlap.

In an embodiment, at the same first side of the periphery edge of the upper plate, the corresponding first upper fixing member and first lower fixing member are provided on each of left and right sides of an X direction center line of the upper plate. Staggering of the first upper fixing member on the left side of the X direction center line of the upper plate with respect to the corresponding first lower fixing member along the Y direction is opposite to staggering of the first upper fixing member on the right side of the X direction center line of the upper plate with respect to the corresponding first lower fixing member along the Y direction; the corresponding fastener passes through the corresponding first upper fixing member and first lower fixing member along the Z direction within the corresponding range in which the projections in the Z direction overlap.

In an embodiment, the double-layer battery module bracket further comprises a first locking member, the first locking member is arranged side by side with the corresponding fastener, the first locking member passes through the first upper fixing member and the upper plate along the Z direction outside the range in which the projections in the Z direction overlap and fixes the first upper fixing member to the upper plate.

In an embodiment, the double-layer battery module bracket further comprises a second locking member, the second locking member is arranged side by side with the corresponding fastener, the second locking member passes through the upper plate and the first lower fixing member along the Z direction outside the range in which the projections in the Z direction overlap and fixes the first upper plate and the first lower fixing member on the supporting mechanism.

In an embodiment, the first lower fixing member is integrally formed with a first convex portion, the first convex portion protrudes from a bottom portion of the first lower fixing member in a direction away from the second locking member; the double-layer battery module bracket further comprises a third locking member, the third locking member passes through the first convex portion along the Z direction and fixes the first lower fixing member on the supporting mechanism.

In an embodiment, the upper fixing member further comprises a second upper fixing member, the second upper fixing member is positioned at the first side of the periphery edge of the upper plate along the X direction; the lower fixing member comprises a second lower fixing member, the second upper fixing member is positioned just above the second lower fixing member, such that a projection of one of a lower surface of the second upper fixing member and an upper surface of the second lower fixing member in the Z direction falls entirely within a projection of the other of the lower surface of the second upper fixing member and the upper surface of the second lower fixing member, the corresponding fastener passes through the second upper fixing member and the second lower fixing member along the Z direction in a range in which the projections in the Z direction overlap.

In an embodiment, a periphery edge of the upper plate has a second side along a Y direction; the double-layer battery module bracket further comprises a lower supporting member, the lower supporting member is positioned at the second side of the periphery edge of the upper plate along the Y direction, an upper side of the lower supporting member in the Z direction is fixedly connected to the upper plate, a lower side of the lower supporting member in the Z direction is fixedly connected to the supporting mechanism.

In an embodiment, the upper plate comprises a receiving groove positioned at a periphery edge, a bottom portion of the upper fixing member is received in the receiving groove.

In an embodiment, the upper plate comprises flanges formed at the receiving groove and protruding toward each other along a Y direction, the upper fixing member comprises two protruding portions which are positioned at the bottom portion of the upper fixing member and protrude outwardly from both side surfaces of the upper fixing member in the Y direction, the two protruding portions and a portion of the bottom portion of the upper fixing member between the two protruding portions are received in the receiving groove, each flanges stops the corresponding protruding portion from above.

In an embodiment, both the upper-layer battery module and the lower-layer battery module each have a protruding part protruding outwardly, a top surface of the upper fixing member attaches to the corresponding protruding part from below along the Z direction, a bottom surface of the lower fixing member attaches to the corresponding protruding part from above along the Z direction, the fastener also passes through the protruding part of the upper-layer battery module and the protruding part of the lower-layer battery module along the Z direction.

In order to achieve the above object, in another respect, the present disclosure provides a device which comprises the battery pack described above, and the battery pack is used for supplying power.

The present disclosure has the following beneficial effects: the fastener passes through the upper fixing member, the upper plate and the lower fixing member along the Z direction within the range in which the projections in the Z direction overlap, and the lower portion of the fastener exposed from the lower fixing member is fixed on the supporting mechanism, the supporting mechanism supports the lower-layer battery module and the lower fixing member, the upper-layer battery module is supported on the upper plate, thereby the battery pack of the present disclosure may arrange the battery modules in a double-layer manner. Since the fastener passes through the upper fixing member, the upper plate and the lower fixing member and fixed to the supporting mechanism along the Z direction within the range in which the projections in the Z direction overlap, the fixing member, the upper plate, the lower fixing member and the supporting mechanism are integrated, the structural rigidity is improved, the fastener can effectively resist the impact from the X direction and the impact from the Y direction; the fixing member, the upper plate, the lower fixing member and the supporting mechanism are connected through the fastener, so that the impact received is quickly and efficiently dispersed by the transfer of the fastener, thereby the battery pack according to the present disclosure can improve the stability of the double-layer battery module bracket.

