CN218448185U

CN218448185U - Battery device

Info

Publication number: CN218448185U
Application number: CN202222456800.7U
Authority: CN
Inventors: 史艳艳; 吕齐龙; 王娟
Original assignee: China Lithium Battery Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2022-09-16
Filing date: 2022-09-16
Publication date: 2023-02-03
Anticipated expiration: 2032-09-16

Abstract

The present disclosure relates to the field of battery technologies, and in particular, to a battery device, where the battery device includes a battery assembly, an electrical assembly, a liquid cooling plate, and a conducting bar assembly, where the battery assembly includes a plurality of battery packs, a first output end, and a second output end, the plurality of battery packs are arranged in a first direction, the first output end is disposed on the first battery pack, and the second output end is disposed on the second battery pack; the electrical component is arranged on the battery component; the liquid cooling plate is arranged between the batteries along the second direction, one end of the liquid cooling plate is provided with a liquid inlet, and the other end of the liquid cooling plate is provided with a liquid outlet; the electric conduction bar assembly is respectively connected with the electric assembly, the first output end, the electric assembly and the second output end, at least part of the electric conduction bar assembly is located on a first side face of the battery assembly, and the first side face is a side face of the battery assembly, which is close to the liquid cooling plate liquid inlet. The temperature uniformity in the battery device can be improved.

Description

Battery device

Technical Field

The present disclosure relates to the field of battery technologies, and particularly, to a battery device.

Background

With the development and progress of technology, electric vehicles are increasingly used. A battery pack is provided in an electric vehicle for storing electric energy and supplying energy to the electric vehicle. In a battery pack, a plurality of batteries are usually arranged, and in practical application, due to problems such as uneven heat dissipation, the temperature of the batteries in different areas in the battery pack is uneven.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The present disclosure is directed to a battery device, and therefore, to at least some extent, to solve the problem of non-uniform temperature of a battery in the battery device.

The present disclosure provides a battery device, including:

the battery pack comprises a plurality of battery packs, a first output end and a second output end, the plurality of battery packs are arranged along a first direction, the first output end is arranged on the first battery pack, the second output end is arranged on the second battery pack, the first battery pack and the second battery pack are different battery packs in the plurality of battery packs respectively, each battery pack comprises at least one row of batteries, each row of batteries comprises a plurality of batteries arranged along a second direction, and the second direction is vertical to the first direction;

the electrical assembly is arranged on the battery assembly;

the liquid cooling plate is arranged between the batteries along the second direction, one end of the liquid cooling plate is provided with a liquid inlet, and the other end of the liquid cooling plate is provided with a liquid outlet;

and the electric conduction bar assembly is respectively connected with the electric assembly, the first output end and the second output end, at least part of the electric conduction bar assembly is positioned on a first side surface of the battery assembly, and the first side surface is a side surface of the battery assembly, which is close to the liquid cooling plate inlet.

The battery device that this disclosed embodiment provided, first output and electric subassembly and second output and electric subassembly are connected respectively to the electricity conduction assembly, and the first side that battery pack is close to the import of liquid cooling board is located to the electricity conduction assembly at least part, thereby make the produced heat of electricity conduction at least part can transmit to the position that battery pack is close to liquid cooling board inlet, thereby can compensate the temperature of the part that the group battery is close to liquid cooling board inlet, the inhomogeneous problem of liquid cooling board inlet end and play liquid end battery pack temperature has been solved to at least a certain extent, the uniformity of temperature in the battery device has been promoted.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.

Fig. 1 is a schematic structural diagram of a battery device according to an exemplary embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of another battery device provided in an exemplary embodiment of the present disclosure;

fig. 3 is a partially enlarged schematic view of a battery device according to an exemplary embodiment of the present disclosure.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, so it should be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless explicitly specified or limited otherwise, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and encompass, for example, a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it should be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in the context of a connection between one element or feature and another element(s), "on," "under," or "inside" or "outside," it can be directly connected to the other element(s) "on," "under" or "inside" or "outside," or indirectly connected to the other element(s) "on," "under" or "inside" or "outside" through intervening elements.

An exemplary embodiment of the present disclosure provides a battery device, as shown in fig. 1, 2 and 3, including: the battery pack comprises a battery assembly 10, an electrical assembly 20, a liquid cooling plate 30 and a conducting bar assembly 40, wherein the battery assembly 10 comprises a plurality of battery packs, a first output end 13 and a second output end 14, the plurality of battery packs are arranged along a first direction, the first output end 13 is arranged on the first battery pack 11, the second output end 14 is arranged on the second battery pack 12, the first battery pack 11 and the second battery pack 12 are different battery packs in the plurality of battery packs respectively, each battery pack comprises at least one column of batteries, each column of batteries comprises a plurality of batteries arranged along a second direction, and the second direction is perpendicular to the first direction; the electrical component 20 is arranged on the battery component 10; the liquid cooling plate 30 is arranged between the batteries along the second direction, one end of the liquid cooling plate 30 is provided with a liquid inlet, and the other end is provided with a liquid outlet; the conductive bar assembly 40 is connected to the electrical assembly 20 and the first output terminal 13, and the electrical assembly 20 and the second output terminal 14, respectively, and at least a portion of the conductive bar assembly 40 is located on a first side surface of the battery assembly 10, where the first side surface is a side surface of the battery assembly 10 close to the liquid inlet of the liquid cooling plate 30.

The battery device that this disclosed embodiment provided, electrically conductive row subassembly 40 connects first output 13 and electric subassembly 20 and second output 14 and electric subassembly 20 respectively, and electrically conductive row subassembly 40 is at least partly located battery pack 10 and is close to the first side of liquid-cooled board 30 import, thereby make electrically conductive row produced heat at least part can transmit to battery pack 10 and be close to the position of liquid-cooled board 30 inlet, thereby can compensate the temperature of the part that the group battery is close to liquid-cooled board 30 inlet, the inhomogeneous problem of liquid-cooled board 30 inlet and play liquid battery pack 10 temperature has been solved to a certain extent to at least, the uniformity of temperature end in the battery device has been promoted.

Further, the battery device provided by the embodiment of the present disclosure may further include a box 50 and a heat conducting member 70, where the box 50 has an accommodating space, and the battery assembly 10, the electrical assembly 20, the liquid cooling plate 30, the conductive bar assembly 40, and the heat conducting member 70 are disposed in the accommodating space of the box 50. The heat conduction member 70 is provided at an end of the battery pack in the second direction, and the heat conduction member 70 is located between the battery pack and the conductive bar assembly 40.

The following will explain each part of the battery device provided by the embodiment of the present disclosure in detail:

the case 50 may include a bottom plate 51 and a rim 52, the rim 52 being coupled to the bottom plate 51, and the rim 52 surrounding the bottom plate 51. The frame 52 forms an accommodation space in which the battery pack is disposed on the top surface side of the base plate 51. The frame 52 and the base plate 51 may be connected by one or more of welding, bolting, riveting and gluing.

The battery pack 10 is disposed in the accommodating space of the box 50, the battery pack 10 includes a plurality of battery packs arranged along a first direction, the battery packs include at least one row of batteries, the plurality of batteries in the row of batteries are arranged along a second direction, and the second direction is perpendicular to the first direction. When a plurality of rows of cells are included in the battery pack, the plurality of rows of cells are arranged in the first direction. In practical applications, the battery assembly 10 may also be formed by a plurality of rows of batteries, and the plurality of rows of batteries are divided into at least two battery packs.

For example, the first direction may be a longitudinal direction of the base plate 51, and the second direction may be a short-side direction of the base plate 51. The plurality of battery packs are sequentially arranged in the longitudinal direction of the base plate 51, and a plurality of batteries in a row of batteries are arranged in the short direction of the base plate 51.

In the embodiment of the present disclosure, the multiple columns of batteries in the battery pack may be aligned, or the multiple columns of batteries in the battery pack may be staggered. When the batteries in the battery pack are cylindrical batteries, in order to improve the space utilization rate in the battery device, two adjacent columns of batteries can be arranged in a staggered mode. For example, the diameter of the first row of cells in the first direction is tangential to the second row of cells. The number of columns and arrangement of cells in the plurality of battery packs may be the same.

The battery that this disclosed embodiment provided can include casing, electric core and utmost point post, and the casing has the holding chamber, and the electric core is located in the holding chamber in the casing, and the casing is located to utmost point post part at least stretches into the holding chamber.

The housing is used for forming the outer contour of the battery and protecting devices in the battery. The casing is hollow columnar structure, for example, the casing can include shell main part, first end plate and second end plate, and the shell main part is both ends open-ended columnar structure, and first end plate and second end plate set up respectively at the both ends of shell main part.

It should be noted that, in the above embodiment, the battery is exemplified as a cylindrical battery, but in the embodiment of the present disclosure, the battery is not limited to a cylindrical battery, and in practical applications, the battery may be a square battery, and the like.

In the disclosed embodiment, a plurality of rows of cells in one cell group are electrically connected, and a plurality of cell groups are electrically connected. To accomplish the electrical connection of the cells in the battery pack and the electrical connection between the battery packs, the battery assembly 10 may further include a bus bar assembly. Illustratively, the bus bar assembly may include an intermediate bus bar 110 and an output bus bar 120, the intermediate bus bar 110 being used to make electrical connections to the plurality of cells in the battery pack, the output bus bar 120 being provided at an end of the intermediate bus bar 110, the output bus bar 120 being used to make electrical connections between the battery packs, and to the conductive bar assembly 40.

It should be noted that, in the embodiment of the present disclosure, when a plurality of columns of cells in the battery pack are aligned, one row of cells is a row of cells arranged along a straight line. When a plurality of columns of batteries in the battery pack are distributed in a staggered mode, one row of batteries is a row of batteries distributed in a broken line mode. The plurality of cells in a row are located in the same position in the corresponding column, for example, a column of cells has N cells, and the cells in a column of cells are numbered 1-N in the second direction, in this case, the battery pack has N rows of cells, and the cells in each row are numbered in the same position in the corresponding column.

In the embodiment of the present disclosure, the polarities of the first output terminal 13 and the second output terminal 14 are different, the first output terminal 13 is one of a total positive output terminal and a total negative output terminal, and the second output terminal 14 is the other of the positive output terminal and the total negative output terminal.

The output bus bars 120 are provided at the ends of the battery pack, and the output bus bars 120 may include a total positive output bus bar, a total negative output bus bar, and a cross-over bus bar 130. The total positive output end bus bar is connected to a total positive electrode of a battery array formed by connecting the plurality of battery packs, and the total negative output end bus bar is connected to a total negative electrode of the battery array formed by connecting the plurality of battery packs. For example, a plurality of battery packs may be connected in series, and the total positive output terminal bus bar and the total negative output terminal bus bar are connected to the starting end and the ending end of the series-connected batteries, respectively.

The total positive output end bus bar may be disposed at one end of the first battery pack 11 close to the liquid inlet of the liquid cooling plate 30, and the total positive output end bus bar is disposed at the top of the first battery pack 11. The total positive output end bus bar is provided with a first bending part, the first bending part is connected with the total positive output end bus bar, and the first bending part extends towards one side close to the bottom plate 51. That is, the first bent portion is located at the first side surface of the first battery pack 11. The first conductive bar 41 is connected to the first bent portion.

The total negative output bus bar may be disposed at an end of the second cell set 12 near the liquid inlet of the liquid-cooled plate 30, and the total negative output bus bar is disposed at the top of the second cell set 12. The total negative output end bus bar is provided with a second bent part, the second bent part is connected with the total negative output end bus bar, and the second bent part extends towards one side close to the bottom plate 51. That is, the second bent part is located at the first side surface of the second battery pack 12. The second conductive bar 42 is connected to the second bent portion.

In the embodiment of the present disclosure, the first output end 13 may be a first bending portion, and the second output end 14 may be a second bending portion. That is, the conductive bar assembly 40 is connected to the first bent portion and the electrical assembly 20 and the second bent portion and the electrical assembly 20, respectively.

The conductive bar assembly 40 is connected to the electrical assembly 20 and the first output terminal 13 and the electrical assembly 20 and the second output terminal 14, respectively, and at least a portion of the conductive bar assembly 40 is located on a first side of the battery assembly 10.

The conductive bar assembly 40 comprises a first conductive bar 41 and a second conductive bar 42, the first conductive bar 41 is connected with the first output end 13 and the electrical assembly 20, and at least part of the first conductive bar 41 is located on the first side surface; a second conductive bar 42 connects the second output 14 to the electrical component 20, the second conductive bar 42 being at least partially located on the first side.

The first conductive row 41 comprises a first conductive segment 411 and a second conductive segment 412, the first conductive segment 411 is disposed on the first side surface, and the first conductive segment 411 is connected to the first output terminal 13; the second conductive segment 412 is disposed on the top surface of the battery assembly 10, and the second conductive segment 412 connects the first conductive segment 411 and the electrical assembly 20, respectively.

The first conductive segment 411 may be a rectangular conductive piece, and the first conductive segment 411 extends from the first bent portion to a position corresponding to the orthographic projection area of the electrical component 20 on the first side of the battery assembly 10. The second conductive segment 412 is disposed on the top of the battery assembly 10, and one end of the second conductive segment 412 is connected to the electrical assembly 20, and one end of the second conductive segment 412 away from the electrical assembly 20 has a bent segment, the bent segment extends to a side close to the bottom plate 51, and the bent segment is connected to the first conductive segment 411.

The second conductive row 42 may include a third conductive segment disposed on the first side and a fourth conductive segment connected to the second output 14; the fourth conductive segment is disposed on the top surface of the battery assembly 10 and connects the third conductive segment to the electrical assembly 20.

The third conductive segment may be a rectangular conductive strip, and the third conductive segment extends from the second bent portion to a position corresponding to the orthographic projection area of the electrical component 20 on the first side of the battery component 10. The fourth conductive segment is disposed on the top of the battery assembly 10, one end of the fourth conductive segment is connected to the electrical assembly 20, one end of the fourth conductive segment, which is far away from the electrical assembly 20, has a bent segment, the bent segment extends to a side close to the bottom plate 51, and the bent segment is connected to the third conductive segment.

In the disclosed embodiment, the second conductive segment 412 and the fourth conductive segment are respectively connected to the electrical assembly 20, the second conductive segment 412 and the fourth conductive segment have a spacing therebetween, and the spacing between the second conductive segment 412 and the fourth conductive segment is less than the width of the battery pack in the first direction. Further, an insulating layer may be disposed between the second conductive segment 412 and the fourth conductive segment, the insulating layer isolating the second conductive segment 412 from the fourth conductive segment. The top of the insulating layer may be higher than the tops of the second conductive segment 412 and the fourth conductive segment to increase the creepage distance for the second conductive segment 412 and the fourth conductive segment.

The first and second

conductive bars

41 and 42 may be metal conductive bars, for example, the material of the first and second

conductive bars

41 and 42 may be one or more of copper, iron, aluminum, silver, tungsten, nickel, cadmium, and titanium.

In one possible embodiment of the present disclosure, the first battery pack 11 and the second battery pack 12 are batteries at two ends of the battery assembly 10 in the first direction, respectively. That is, the starting end of the first conductive bar 41 is located at one end of the first side of the battery assembly 10, and the starting end of the second conductive bar 42 is located at the other end of the first side of the battery assembly 10, so that the conductive bar assembly 40 can pass through more battery packs, thereby improving the uniformity of the temperature in the battery device.

The first bending part is arranged on the first battery pack 11, the second bending part is arranged on the second bending part, the first conducting bar 41 is connected with the first bending part, and the second conducting bar 42 is connected with the second bending part, so that the conducting bars are basically and uniformly arranged on the first surface of the battery assembly 10 in the first direction, the uniform compensation heat of the conducting bars on the first surface of the battery assembly 10 can be ensured, and the uniformity of the temperature in the battery device is further improved.

For example, in the embodiment of the present disclosure, the first conductive bar 41 is a negative conductive bar, the second conductive bar 42 is a positive conductive bar, the first total output bus bar is a negative output bus bar, and the second total output bus bar is a positive output bus bar. The electrode post in the battery is a positive electrode, and the shell is a negative electrode.

The electrical component 20 is disposed at a portion of the battery assembly 10 close to the first battery pack 11, and the electrical component 20 is disposed at a top portion of the battery assembly 10, the top portion of the battery assembly 10 being a side of the battery assembly 10 away from the bottom plate 51. For example, a mounting panel may be provided on the top of the battery assembly 10, and the electrical assembly 20 may be provided on the mounting panel.

The electrical assembly 20 may include a battery management system and a connector, which are disposed on the mounting panel. The conducting bar can be connected to the plug connector, and the plug connector is also connected to the output interface, and the output interface is used for connecting external devices.

The heat conduction member 70 is provided at an end of the battery pack in the second direction, and the heat conduction member 70 is located between the battery pack and the conductive bar assembly 40. The heat conductive members 70 are in contact with the battery and busbar assembly 40, respectively.

In a possible embodiment of the present disclosure, a side of the heat-conducting member 70 facing the battery pack is provided with a limiting portion, and the shape of the limiting portion and the shape of the end of the battery pack are matched to limit the battery pack. For example, when the battery is a cylindrical battery, the side of the heat conducting member 70 facing the battery pack may be provided with a plurality of arc-shaped recesses, and each arc-shaped recess corresponds to one column of the battery pack.

The heat conductive member 70 may be connected to the case 50, and for example, the heat conductive member 70 may be connected to the bottom plate 51 or the frame 52. In practice, the thermal conductor member 70 may also serve to insulate the battery pack from the frame 52, in which case the thermal conductor member 70 surrounds the battery pack and the thermal conductor member 70 is located between the frame 52 and the battery assembly 10.

The material of the heat conducting member 70 provided by the embodiment of the present disclosure may be an insulating heat conducting material, and the heat conducting member 70 made of the insulating heat conducting material can transmit the heat generated by the conductive bar to the battery assembly 10 on one hand, and can also realize insulation between the conductive bar and the battery on the other hand.

The conductive bar assembly 40 is attached to the thermal conductive member 70, for example, the conductive bar assembly 40 is attached to the thermal conductive member 70 by a tie. That is, the first conductive segment 411 and the third conductive segment are connected to the heat conductive member 70 by a band. Attachment holes may be provided in the thermal conductor member 70 through which straps may be inserted to bundle the conductive bar assembly 40.

Of course, in practical applications, the conductive bar assembly 40 may be connected to the heat-conducting member 70 by other means, for example, the conductive bar assembly 40 may be connected to the heat-conducting member 70 by adhesion. The first conductive segment 411 and the third conductive segment are respectively bonded to the heat conducting member 70 through a heat conducting adhesive.

The liquid cooling plate 30 is arranged between two adjacent columns of batteries, the two ends of the liquid cooling plate 30 are respectively provided with a liquid inlet and a liquid outlet, and the liquid cooling plate 30 is also provided with a liquid cooling channel communicated with the liquid inlet and the liquid outlet. The cooling fluid enters the liquid cooling plate 30 from the fluid inlet and passes through the fluid cooling passages to the fluid outlet. The cooling fluid is at a low temperature at the inlet and at a high temperature at the outlet, so that the temperature of the battery near the inlet of the liquid cooling plate 30 is lower than that of the battery near the outlet of the liquid cooling plate 30. The conductive bar assembly 40 is arranged on one side of the battery assembly 10 close to the liquid inlet of the liquid cooling plate 30, so that the temperature of the battery can be compensated by the heat of the conductive bar.

In the embodiment of the present disclosure, the battery device includes a plurality of liquid-cooling plates 30, and the liquid-cooling plates 30 may be disposed at intervals from the battery, that is, a column of batteries is disposed between two adjacent liquid-cooling plates 30. Or multiple rows of batteries may be disposed between two adjacent liquid-cooled plates 30, which is not limited in this embodiment of the disclosure.

The embodiment of the present disclosure provides a battery device, electrically conductive row subassembly 40 connects first output 13 and electric subassembly 20 and second output 14 and electric subassembly 20 respectively, and electrically conductive row subassembly 40 at least part is located battery pack 10 and is close to the first side of liquid-cooled board 30 import, thereby make electrically conductive row produced heat at least part can transmit to battery pack 10 and be close to the position of liquid-cooled board 30 inlet, and so as to compensate the temperature of the part that the group battery is close to liquid-cooled board 30 inlet, the inhomogeneous problem of liquid-cooled board 30 inlet and play liquid end battery pack 10 temperature has been solved to at least a certain extent, the uniformity of temperature in the battery device has been promoted.

The battery device provided by the embodiment of the disclosure can be applied to an electric vehicle, and when the battery device is used for the electric vehicle, the battery device can be a battery pack which is mounted on the electric vehicle and provides energy for the electric vehicle.

In practical application, the battery pack can be mounted on a frame of an electric vehicle. The battery pack can be fixedly connected with the frame. Or the battery pack can be a modular battery pack which can be detachably connected to the vehicle body, so that the battery pack is convenient to replace.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A battery device, characterized in that the battery device comprises:

the battery pack comprises a plurality of battery packs, a first output end and a second output end, wherein the plurality of battery packs are arranged along a first direction, the first output end is arranged on the first battery pack, the second output end is arranged on the second battery pack, the first battery pack and the second battery pack are different battery packs in the plurality of battery packs respectively, each battery pack comprises at least one row of batteries, each row of batteries comprises a plurality of batteries arranged along a second direction, and the second direction is vertical to the first direction;

the electrical assembly is arranged on the battery assembly;

the liquid cooling plate is arranged between two adjacent rows of the batteries along the second direction, one end of the liquid cooling plate is provided with a liquid inlet, and the other end of the liquid cooling plate is provided with a liquid outlet;

and the conductive bar assembly is respectively connected with the electrical assembly, the first output end and the electrical assembly and the second output end, at least part of the conductive bar assembly is positioned on a first side surface of the battery assembly, and the first side surface is a side surface of the battery assembly, which is close to the liquid cooling plate inlet.

2. The battery device according to claim 1, wherein the first battery pack and the second battery pack are battery packs at both ends of the battery assembly in the first direction, respectively.

3. The battery device of claim 2, wherein the electrical component is disposed on the battery component proximate to the first battery pack.

4. The battery device of claim 1, wherein the battery device further comprises:

the battery pack is arranged in the box body;

the electric assembly is arranged at the top of the first battery pack, and the top of the first battery pack is the side, far away from the bottom plate, of the first battery pack.

5. The battery device of claim 1, wherein the battery device further comprises:

and the heat conducting piece is arranged between the first side surface of the battery assembly and the conductive bar assembly.

6. The battery device of claim 5, wherein the thermal conductors are in contact with the battery pack and the current conducting bar assembly, respectively.

7. The battery device according to claim 5, wherein a side of the heat-conducting member facing the battery pack is provided with a stopper portion, and the stopper portion and an end portion of the battery pack are shaped to match each other to limit the battery pack.

8. The battery device of claim 5, wherein the conductive bar assembly is attached to the thermally conductive member by a tie.

9. The battery device of claim 1, wherein the conductive bar assembly comprises:

a first conductive bar connecting the first output and the electrical component, the first conductive bar being at least partially located on the first side;

a second conductive bar connecting the second output and the electrical component.

10. The battery device of claim 9, wherein the first conductive bar comprises:

the first conductive segment is arranged on the first side surface and is connected with the first output end;

a second conductive segment disposed on a top surface of the battery assembly and connected to the first conductive segment and the electrical assembly, respectively.

11. The battery device of claim 9, wherein the first output terminal is one of a total positive output terminal and a total negative output terminal, and the second output terminal is the other of the positive output terminal and the total negative output terminal.

12. The battery device of any of claims 1-11, wherein the battery is a cylindrical battery.