CN219564756U - Battery loading unit for vehicle, power battery and electric vehicle - Google Patents

Abstract

The utility model provides a battery loading unit for a vehicle, a power battery and an electric vehicle. The vehicle battery loading unit comprises a battery box, a sealing cover, a vehicle body connecting piece and a box connecting piece, wherein the sealing cover is arranged on the battery box, a battery cavity is formed between the battery box and the sealing cover, and the vehicle body connecting piece is positioned outside the battery cavity; the battery box is fixedly connected to the sealing cover through the box body connecting piece, and the sealing cover is connected with an external vehicle body through the vehicle body connecting piece.

Description

Battery loading unit for vehicle, power battery and electric vehicle

Technical Field

The utility model relates to the technical field of electric automobiles, in particular to a battery loading unit for a vehicle, a power battery and an electric automobile.

Background

The battery pack in the electric automobile is connected with the automobile body into a whole in a mode of being hung at the bottom of the automobile body. The existing battery pack comprises a battery box for loading a battery pack and positioned at the bottom, a sealing cover positioned at the top and covering the battery box, and a mounting mechanism, wherein the mounting mechanism is fixedly connected with the battery box in the battery box and is connected to a vehicle body after extending out of the sealing cover, and a through hole is formed in the sealing cover for the mounting mechanism to penetrate out. Therefore, regarding the current battery pack, a sealing measure needs to be provided between the mounting mechanism and the through hole of the sealing cover, which increases the production cost of the battery pack and makes the structural design and assembly of the battery pack difficult.

Disclosure of Invention

In view of the above, the present utility model provides a battery loading unit for a vehicle that is simpler in structural design, easier to assemble and manufacture, and also ideal in sealing effect.

The utility model provides a vehicle battery loading unit, which comprises a battery box, a sealing cover, a vehicle body connecting piece and a box connecting piece, wherein the sealing cover is arranged on the battery box; the battery box is fixedly connected to the sealing cover through the box body connecting piece, and the sealing cover is connected with an external vehicle body through the vehicle body connecting piece.

Compared with the prior art, the vehicle battery loading unit has at least the following beneficial effects:

1) The vehicle body connecting piece arranged on one side of the sealing cover and the box body connecting piece arranged on the other side of the sealing cover are respectively positioned outside the battery cavity and inside the battery cavity, any one of the vehicle body connecting piece and the box body connecting piece cannot invade the space where the other one is positioned, the vehicle battery loading unit can be connected to an external vehicle body through the vehicle body connecting piece independently on the basis that the sealing cover is connected with the battery box through the box body connecting piece, a through hole formed in the sealing cover and a mounting mechanism penetrating through the through hole are omitted, continuity and integrity of the sealing cover are ensured, a sealing structure is not required to be arranged between the sealing cover and the vehicle connecting piece, or sealing consolidation operation is carried out between the sealing cover and the box body connecting piece, and therefore, the production cost of the vehicle battery loading unit is reduced, and the difficulty is reduced whether the vehicle battery loading unit is structurally designed or assembled and manufactured;

2) Under the condition that the battery loading unit for the vehicle is hung on an external vehicle body, interaction forces exist between the vehicle body connecting piece and the sealing cover and between the box body connecting piece and the sealing cover, namely the sum of the gravity of the sealing cover, the battery box and the battery pack in the battery box and the sum of the gravity of the battery pack in the battery box, and the result of the interaction forces is that the force of the vehicle body connecting piece acting on the sealing cover and the force of the box body connecting piece acting on the sealing cover at least offset one part of the interaction forces, so that the sealing cover can be balanced to a certain extent, the stability of the shape structure of the sealing cover is favorably maintained, the situation that the stress on one side of the sealing cover is overlarge, the relatively larger stress side of the sealing cover is stretched, finally, the sealing cover is ensured not to deform greatly, and the part of the sealing cover, such as the sealing cover edge, for example, which is used for matching the battery box cannot bend and deform, and the sealing fit between the sealing cover and the battery box is favorably consolidated.

In one embodiment, the case connector is fixedly adhered to the battery case by a cured adhesive.

The arrangement is simple in connection between the cover and the battery box and easy to execute.

In one embodiment, the battery loading unit for a vehicle further comprises a sealing cover connecting piece which is positioned in the battery cavity and fixedly connected to the battery box, the sealing cover connecting piece is provided with a glue injection groove, the box connecting piece stretches into the glue injection groove, and curing glue is poured between the groove wall of the glue injection groove and the box connecting piece.

So set up, the solidification is glued and can be in the injecting glue inslot and stretch into the box connecting piece adhesion and fixed combination in injecting glue groove, both can ensure the solidification of adhesion abundant on the box connecting piece and glue, can also restrict the solidification and flow in order to avoid solidification to glue to run off, finally ensures the bonding between closing cap connecting piece and the box connecting piece reliable.

In one embodiment, at least one of the groove wall of the glue injection groove and the box body connecting piece is provided with an anti-drop relief structure, and the solidified glue covers and adheres to the surface of the anti-drop relief structure.

The setting is that the adhesion and consolidation area between the curing glue and the sealing cover connecting piece and/or the box connecting piece is bigger, the covering layer formed after the curing glue is cured has more complex undulating structure, so the bonding strength between the curing glue and the sealing cover connecting piece and/or the box connecting piece is higher, the bonding is reliable and the separation is not easy.

In one embodiment, the box connector comprises a column part positioned in the glue injection groove, the sealing cover connector comprises a column part provided with the glue injection groove, and a closed-loop space for filling the curing glue therein is formed between the column part and the column part.

In this way, a continuous bonding position is formed between the box body connecting piece and the sealing cover connecting piece in the circumferential direction of the column part or the column casing part, namely, the bonding area between the column part and the column casing part is cylindrical, so that the area of the bonding area between the column part and the column casing part is maximized, and the bonding strength between the box body connecting piece and the sealing cover connecting piece is further improved.

In one embodiment, the battery box comprises a box body with a containing groove, and further comprises a reinforcement which is positioned in the containing groove and fixedly connected with the box body, wherein the sealing cover connecting piece is fixedly connected with the reinforcement, and the reinforcement and the box body form multi-point fixed connection; or the reinforcement and the box body form surface contact fixed connection.

So set up, the rigidity and the intensity of box have been strengthened indirectly in the setting of reinforcement, the battery box that the mode that combines through light box and reinforcement obtained, holistic rigidity and intensity are all improved in single box, and avoided not having to improve the problem that the battery box that the structural strength led to on the battery box improves the position, in addition, compare in the scheme of closing cap connecting piece direct fixed connection in the box, in this embodiment, the box connecting piece is smaller through the local maximum pressure that closing cap connecting piece and reinforcement indirect effect pulling force produced on the box, the pressure that the box produced is shared in the bigger region on the box, this is favorable to restricting the deformation range of box, can maintain the stability of box structure better.

In one embodiment, the vehicle body connection is welded to the side of the cover facing away from the battery compartment; and/or the box body connecting piece is welded and fixed on one side of the sealing cover facing the battery cavity.

The arrangement is that the vehicle body connecting piece and the sealing cover are connected to form an integral type non-detachable structure, and the box connecting piece and the sealing cover are connected to form an integral type non-detachable structure.

In one embodiment, the vehicle body connecting member and the box connecting member are spaced apart in the load bearing direction of the vehicle battery loading unit, and are respectively disposed back to the opposite sides of the cover.

The arrangement is that the two sides of the sealing cover, which are used for the back support of the vehicle body connecting piece and the box connecting piece, can better maintain a flat state, the force of the vehicle body connecting piece acting on the sealing cover and the force of the box connecting piece acting on the sealing cover are at least partially counteracted in the loading direction of the vehicle battery loading unit, and finally, the direction of the combined force born by the plate layers on the two sides of the sealing cover is the same as the loading direction of the vehicle battery loading unit, so that the stress distribution of the sealing cover edge of the adaptive battery box is more uniform, the stress direction or the stress size of each part of the sealing cover edge is not uniform, and a gap is formed between the battery box and the local part of the sealing cover edge.

In one embodiment, the number of the vehicle body connecting pieces and the number of the box body connecting pieces are multiple and equal, the vehicle body connecting pieces and the box body connecting pieces are in one-to-one correspondence, and any one vehicle body connecting piece and the box body connecting piece corresponding to the vehicle body connecting piece are arranged at intervals along the loading direction of the vehicle battery loading unit.

The force of the vehicle body connecting piece acting on the sealing cover is respectively born by the positions of the sealing cover, which are connected with the plurality of vehicle body connecting pieces, the force of the box body connecting piece acting on the sealing cover is respectively born by the positions of the sealing cover, which are connected with the plurality of box body connecting pieces, and the positions of the sealing cover, which are connected with the independent vehicle body connecting pieces, are respectively born by the positions of the sealing cover, and the deformation of the positions of the sealing cover, which are connected with the independent box body connecting pieces, is smaller, so that the structural stability of the sealing cover can be better maintained.

In one embodiment, the cover comprises a cover body for covering the battery box, and further comprises a reinforcing member for fixedly connecting the box body connecting member to the cover body, wherein the reinforcing member is fixedly connected to one side of the cover body forming the cavity wall of the battery cavity, and the cover body comprises: the reinforcement piece is fixedly connected with the cover body at multiple points; or the reinforcing piece and the cover body form surface contact fixed connection.

The arrangement of the reinforcement indirectly strengthens the rigidity and strength of the sealing cover, the sealing cover is obtained through the combination of the light cover body and the reinforcement, the integral rigidity and strength are improved compared with those of a single cover body, the problem that the sealing cover is heavy due to the fact that structural strength is improved at a non-necessary strengthening part of the sealing cover is avoided, in addition, compared with the scheme that the box body connecting piece is directly fixedly connected to the sealing cover, in the embodiment, the local maximum pressure intensity generated by indirectly acting pulling force of the box body on the cover body through the box body connecting piece and the reinforcement is smaller, the pressure intensity generated by pulling force of the cover body is shared in a larger area of the cover body, deformation amplitude of the cover body is limited, and stability of the sealing cover structure can be better maintained.

The utility model also provides a power battery, which comprises a battery pack and the vehicle battery loading unit, wherein the battery pack is fixedly arranged in the battery cavity.

The utility model also provides an electric automobile, which adopts the power battery provided by the utility model as an energy supply device for generating driving force.

Drawings

Fig. 1 is a schematic structural view of a battery loading unit for a vehicle according to an embodiment of the present utility model;

FIG. 2 is a schematic top view of a battery loading unit for a vehicle according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of the battery loading unit for a vehicle shown in FIG. 2 taken along the A-A plane;

FIG. 4 is a schematic view of a battery loading unit for a vehicle after opening a battery cavity according to an embodiment of the present utility model;

fig. 5 is a schematic view of a battery loading unit for a vehicle according to an embodiment of the present utility model after opening a battery chamber.

100. A battery loading unit for a vehicle; 10. a battery box; 11. a case; 111. a holding groove; 12. a reinforcement; 20. a cover; 30. a battery cavity; 40. a vehicle body connection member; 50. a box body connecting piece; 60. a cover connection; 61. a cylindrical portion; 70. and (5) curing the glue.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.

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 utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.

The utility model discloses a battery loading unit 100 for a vehicle, which is used for carrying and loading a battery pack on the vehicle so as to meet the electricity demand of the vehicle, and correspondingly, the utility model also discloses a power battery for loading the battery pack by adopting the battery loading unit 100 for the vehicle, and further discloses an electric vehicle adopting the power battery.

The battery loading unit 100 for a vehicle may be configured as a power battery, and a battery pack loaded therein may be configured to supply electric power to a driving motor for driving an electric vehicle, or may be configured as a part of a general battery for a vehicle, and a battery pack loaded therein may be configured to supply electric power to electrical devices for a vehicle, including a lamp, an air conditioner, a sensor, and the like.

Referring to fig. 1 to 2, the battery loading unit 100 for a vehicle shown in fig. 1 to 2 is a battery pack for containing a power battery, and hereinafter, the specific structure and assembly connection of the battery loading unit 100 for a vehicle shown in fig. 1 to 2 will be described in detail by taking the battery loading unit 100 for a vehicle shown in fig. 1 to 2 as an example.

The battery loading unit 100 for a vehicle comprises a battery box 10 and a cover 20, wherein the battery box 10 and the cover 20 are connected and combined to form a flat box structure, the battery box 10 is provided with a containing groove 111 for containing a battery pack (not shown), the containing groove 111 is opened, the opening direction of the containing groove is towards an external vehicle body, the cover 20 is covered on one side of the battery box 10 towards the external vehicle body so as to close the containing groove 111, and therefore a battery cavity 30 is formed by jointly surrounding the battery box 10 and the cover 20.

Referring to fig. 3, in a state that the cover 20 is covered on the battery case 10, an opening edge of the accommodating groove 111 of the battery case 10 is fixedly connected with an edge of the cover 20 and forms a sealing fit, so as to ensure that the battery pack in the battery cavity 30 is prevented from being damaged or accident after dust and moisture are infiltrated.

Referring again to fig. 3, and referring to fig. 4 to 5 together, the battery loading unit 100 for a vehicle further includes a vehicle body connecting member 40 and a case connecting member 50, the vehicle body connecting member 40 is used for connecting the battery pack and the cover 20 to form a whole that is connected to an external vehicle body, thereby realizing mounting of the battery loading unit 100 for a vehicle on the vehicle body, and the case connecting member 50 is used for connecting the battery case 10 and the cover 20, so as to improve the structural strength of the battery loading unit 100 for a vehicle itself.

For the power battery, the battery loading unit 100 for the vehicle is mounted on the bottom of the external vehicle body, and in the mounted state, the battery box 10 and the cover 20 are sequentially stacked along the loading direction of the battery loading unit 100 for the vehicle, the battery box 10 is positioned on one side of the cover 20 relatively close to the ground, and one side of the cover 20 away from the battery box 10 faces the bottom of the vehicle body. When the vehicle is in a horizontal plane, the load direction of the vehicle battery loading unit 100 is the vertical direction.

Specifically, the vehicle body connecting member 40 is located outside the battery chamber 30, and is fixedly connected to a side of the cover 20 facing the vehicle body bottom, the case connecting member 50 is located in the battery chamber 30, and is fixedly connected to a side of the cover 20 facing the battery case 10 and the battery chamber 30, the vehicle body connecting member 40 and the case connecting member 50 are respectively disposed on opposite sides of the cover 20 facing away from each other, and are disposed at intervals in the load direction of the vehicle battery loading unit 100 and are separated by the cover 20.

The vehicle body connection member 40 protrudes outward with respect to the side of the cover 20 facing away from the battery case 10, and the case connection member 50 protrudes outward with respect to the side of the cover 20 facing toward the battery case 10 and the battery chamber 30 and extends toward the accommodating groove 111, and finally the case connection member 50 is connected to the battery case 10 for forming the inner wall of the bottom of the accommodating groove 111. The order of assembly of the battery loading unit 100 for a vehicle and its mounting to the vehicle body is: the battery case 10 is fixedly connected with the cover 20 through the case connecting member 50 to be combined into an integrated battery loading unit 100 for vehicles, and then the cover 20 is connected with an external vehicle body through the vehicle body connecting member 40.

Alternatively, the vehicle body connector 40 is welded to the side of the cover 20 facing away from the battery chamber 30, and the case connector 50 is welded to the side of the cover 20 facing toward the battery chamber 30.

Alternatively, the depth direction of the accommodating groove 111, that is, the direction of the interval between the plane of the opening of the accommodating groove 111 and the plane of the bottom of the accommodating groove 111, is the loading direction of the battery loading unit 100 for vehicles.

In some embodiments, the case connector 50 is adhesively secured to the battery case 10 by a cured glue 70. Referring to fig. 3 to 4, the battery loading unit 100 for a vehicle further includes a cover connecting member 60, the cover connecting member 60 is located in the battery cavity 30 and is fixedly connected to the battery case 10, a glue injection groove is formed at one end of the cover connecting member 60 relatively close to the cover 20, after the cover 20 is covered on the battery case 10, the case connecting member 50 extends into the glue injection groove, and finally the curing glue 70 adheres and fixes the groove wall of the glue injection groove and the case connecting member 50 together.

The curing glue 70 is pre-filled into the glue injection groove in a state that the sealing cover 20 is not covered on the battery box 10, along with the increase of the part of the box body connecting piece 50 extending into the glue injection groove, the volume in the glue injection groove is reduced, thereby the curing glue 70 raw material flows and spreads and gradually occupies the space between the box body connecting piece 50 and the wall of the glue injection groove, after the sealing cover 20 covers the containing groove 111, the sealing cover 20 and the battery box 10 are kept stand for a period of time, and the curing glue 70 raw material is cured.

Specifically, the case connecting member 50 includes a cylindrical portion formed at a bottom portion thereof relatively close to the accommodating groove 111, the cap connecting member 60 includes a cylindrical portion 61 formed at a distal end thereof relatively close to the cap 20, the injection groove is opened at the cylindrical portion 61, and the opening of the injection groove is directed toward the cap 20 and the cylindrical portion. After the cover 20 is covered on the battery case 10, the column part extends into the column part 61, and a closed-loop space for the curing glue 70 to occupy is formed between the inner peripheral wall of the column part 61 and the outer peripheral wall of the column part.

Optionally, at least one of the groove wall of the glue injection groove and the surface of the box body connecting piece 50 is formed with anti-drop relief structures, and these anti-drop relief structures may be grooves formed on the groove wall of the glue injection groove or the box body connecting piece 50, protrusions protruding on the groove wall of the glue injection groove or the box body connecting piece 50, or a combination of the grooves and the protrusions, and the cured glue 70 finally covers and adheres to the anti-drop relief structures.

Referring again to fig. 3 to 4, the battery case 10 includes a case 11 having a receiving groove 111, and further includes a reinforcement member 12 disposed in the receiving groove 111 and fixedly connected to the case 11, wherein the cover connection member 60 is fixedly connected to the reinforcement member 12, and a multi-point fixed connection is formed between the reinforcement member 12 and an inner wall of the case 11 forming the receiving groove 111, and the connection between the reinforcement member 12 and the case 11 may be achieved by welding, riveting, screwing, or the like.

Specifically, the reinforcing member 12 may be a reinforcing beam in a straight line shape, and the reinforcing member 12 is fixedly disposed on the side of the case 11 facing the cover 20 and forming the bottom of the accommodating groove 111, and a plurality of connection points between the reinforcing member 12 and the case 11 are arranged at intervals along the length direction of the reinforcing member 12. Of course, the reinforcing member 12 may be a reinforcing plate stacked on the bottom of the accommodating groove 111, and a plurality of fixing connection points between the reinforcing member 12 and the case 11 may be arranged in a random or array manner.

It will be appreciated that in other embodiments, the reinforcing member 12 may be fixedly coupled to the tank 11 by way of surface contact.

In the embodiment shown in fig. 3, 4 and 5, the number of the vehicle body connecting members 40 and the number of the case connecting members 50 are plural, and the number of the vehicle body connecting members 40 and the number of the case connecting members 50 are equal, and the vehicle body connecting members 40 and the case connecting members 50 corresponding to the vehicle body connecting members 40 are each arranged at intervals in the load direction of the battery loading unit 100 for a vehicle, and the projection of any one of the vehicle body connecting members 40 on the cover 20 in the depth direction of the containing groove 111 and the projection of the case connecting member 50 corresponding to the vehicle body connecting member 40 on the cover 20 in the same direction coincide with each other.

In an embodiment not shown in the drawings, the cover 20 includes a cover body for covering the battery case 10 and closing the accommodating groove 111, and further includes a reinforcing member fixedly attached to a side of the cover body facing the battery case 10 and the battery chamber 30, and the case connecting member 50 is fixedly attached to the reinforcing member and extends into the accommodating groove 111, and a side of the cover body for attaching the reinforcing member is used for forming a chamber wall of the battery chamber 30.

Specifically, the reinforcing member may be a linear reinforcing beam, and a multipoint fixed connection is formed between the reinforcing member and the cover body, and the fixed connection between the reinforcing member and the cover body may be realized by welding, riveting, screwing, and other manners, where a plurality of fixed connection points between the reinforcing member and the cover body are arranged at intervals along the length direction of the reinforcing member.

Of course, the reinforcing member may be a reinforcing plate stacked on the cover body, and a plurality of fixed connection points between the reinforcing plate and the cover body are arranged randomly or in an array manner.

The technical features of the above-described embodiments may be combined in any manner, and for brevity, all of the possible combinations of the technical features of the above-described embodiments are not described, however, all of the combinations of the technical features should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

It will be appreciated by persons skilled in the art that the above embodiments have been provided for the purpose of illustrating the utility model and are not to be construed as limiting the utility model, and that suitable modifications and variations of the above embodiments are within the scope of the utility model as claimed.

Claims (11)

1. The battery loading unit for the vehicle comprises a battery box (10) and a sealing cover (20), wherein the sealing cover (20) is arranged on the battery box (10) in a covering mode, and a battery cavity is formed between the battery box (10) and the sealing cover (20);

the battery is characterized by further comprising a vehicle body connecting piece (40) positioned outside the battery cavity and a box body connecting piece (50) positioned in the battery cavity;

the battery box (10) is fixedly connected to the sealing cover (20) through the box connecting piece (50), and the sealing cover (20) is connected with an external vehicle body through the vehicle connecting piece (40).

2. The vehicle battery loading unit according to claim 1, wherein the case connecting member (50) is fixedly adhered to the battery case (10) by a cured adhesive.

3. The vehicle battery loading unit according to claim 2, further comprising a cover connection member (60) located in the battery cavity and fixedly connected to the battery box (10), the cover connection member (60) having a glue injection groove, the box connection member (50) extending into the glue injection groove, and a curing glue (70) being poured between a groove wall of the glue injection groove and the box connection member (50).

4. A battery loading unit for a vehicle according to claim 3, wherein an anti-drop relief structure is formed on a surface of at least one of a groove wall of the glue injection groove and the case connecting member (50), and the cured glue (70) is adhered to a surface of the anti-drop relief structure in a covering manner; and/or the number of the groups of groups,

the box body connecting piece (50) comprises a column part positioned in the glue injection groove, the sealing cover connecting piece (60) comprises a column casing part (61) provided with the glue injection groove, and a closed-loop space for filling the curing glue (70) therein is formed between the column part and the column casing part (61).

5. A battery loading unit for a vehicle according to claim 3, wherein the battery box (10) comprises a box body (11) having a receiving groove (111), and further comprising a reinforcement member (12) located in the receiving groove (111) and fixedly connected to the box body (11), the cover connection member (60) being fixedly connected to the reinforcement member (12), wherein:

the reinforcement (12) and the box body (11) form a multi-point fixed connection; or the reinforcement (12) and the box body (11) form surface contact fixed connection.

6. The vehicle battery loading unit according to claim 1, characterized in that the vehicle body connection member (40) is welded to the side of the cover (20) facing away from the battery chamber; and/or the box body connecting piece (50) is welded and fixed on one side of the sealing cover (20) facing the battery cavity.

7. The vehicle battery loading unit according to claim 1, characterized in that the vehicle body connection member (40) and the case connection member (50) are spaced apart in the load direction of the vehicle battery loading unit, and are respectively disposed to be backed on both sides of the cover (20) facing away from each other.

8. The battery loading unit for a vehicle according to claim 7, wherein the number of the vehicle body connecting members (40) and the number of the case connecting members (50) are plural and equal, the vehicle body connecting members (40) and the case connecting members (50) are in one-to-one correspondence, and any one of the vehicle body connecting members (40) and the case connecting member (50) corresponding to the vehicle body connecting member (40) are arranged at intervals in the load direction of the battery loading unit for a vehicle.

9. The battery loading unit for a vehicle according to claim 1, wherein the cover (20) includes a cover body covering the battery case (10), and further includes a reinforcement member to which the case connecting member (50) is fixedly attached, the reinforcement member being fixedly attached to a side of the cover body on which the battery chamber wall is formed, wherein:

the reinforcement piece and the cover body are fixedly connected in a multi-point manner; or the reinforcement piece and the cover body are fixedly connected in a surface contact manner.

10. A power battery comprising a battery pack and the battery loading unit for a vehicle according to any one of claims 1 to 9, the battery pack being fixedly mounted in the battery chamber.

11. An electric vehicle employing the power battery according to claim 10 as an energy supply device for generating driving force.