CN218182419U - Battery device - Google Patents

Abstract

The present disclosure relates to the field of battery technology, and more particularly to a battery device including a plurality of battery packs and a busbar assembly; the bus bar assembly includes an intermediate bus bar for electrically connecting the cells in the battery pack, and an output bus bar including an electrode connection portion connecting electrode terminals of end cells in the battery pack, and a laminated portion connected to the electrode connection portion and extending in a direction close to the intermediate bus bar such that the laminated portion covers at least a part of the intermediate bus bar, the end cells in the battery pack being cells at ends in a column direction in the battery pack. The temperature uniformity in the battery device can be improved.

Description

battery unit

technical field

The present disclosure relates to the technical field of batteries, in particular, to a battery device.

Background technique

With the development and progress of technology, the use of electric vehicles is gradually widespread. A battery pack is provided in the electric vehicle, and the battery pack is used to store electric energy and provide energy to the electric vehicle. A battery pack is usually provided with a plurality of batteries. In practical applications, due to problems such as uneven heating, the temperature of the batteries in different regions in the battery pack will be uneven.

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

Contents of the invention

It is an object of the present disclosure to provide a battery device that at least partially solves the problem of temperature inhomogeneity in the battery device.

The present disclosure provides a battery device comprising:

multiple battery packs;

A bus bar assembly, the bus bar assembly includes an intermediate bus bar and an output end bus bar, the intermediate bus bar is used to electrically connect the batteries in the battery pack, the output end bus bar includes an electrode connection part and a stacked part, The electrode connection part is connected to the electrode terminal of the end battery in the battery pack, the lamination part is connected to the electrode connection part, and the lamination part extends toward the direction close to the middle bus bar, so that the lamination part covers at least As part of the middle bus bar, the end cells in the battery pack are cells at the end of the battery pack along the column direction.

An embodiment of the present disclosure provides a battery device. The battery device includes a bus bar assembly. The bus bar assembly includes an intermediate bus bar and an output end bus bar. The output end bus bar includes an electrode connection part and a lamination part, and the electrode connection part is arranged in the middle. At one end of the bus bar, the laminated part is connected to the electrode connecting part, and the laminated part extends toward the direction close to the intermediate bus bar, so that at least part of the heat generated by the electrode connecting part can be transferred to the intermediate bus bar and the intermediate bus bar. The battery solves the problem of uneven temperature of multiple batteries in the battery device caused by the large heat generated by the bus bar at the output end, and improves the temperature consistency in the battery device.

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 present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure. Apparently, the drawings in the following description are only some embodiments of the present disclosure, and those skilled in the art can obtain other drawings according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a battery device provided by an exemplary embodiment of the present disclosure;

Fig. 2 is a schematic structural diagram of a busbar assembly provided by an exemplary embodiment of the present disclosure;

Fig. 3 is a schematic structural diagram of a confluence unit provided by an exemplary embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a first output busbar provided by an exemplary embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a second output busbar provided by an exemplary embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a third output busbar provided by an exemplary embodiment of the present disclosure;

Fig. 7 is a partially enlarged schematic diagram of a battery device provided by an exemplary embodiment of the present disclosure.

detailed description

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

In the description of the present disclosure, unless otherwise clearly specified and limited, the terms "first" and "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "plurality" is means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the" or "an" are likewise intended to mean one of a possible plurality of such objects.

Unless otherwise specified or explained, the terms "connected" and "fixed" should be interpreted in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or integral connection, or electrical connection, or Connection; "connection" can be a direct connection or an indirect connection through an intermediary. Those skilled in the art can understand the specific meanings of the above terms in the present disclosure according to specific situations.

Furthermore, in the description of the present disclosure, it should be understood that the orientation words such as "upper", "lower", "inner" and "outer" described in the exemplary embodiments of the present disclosure are based on the angles shown in the drawings It should not be construed as limiting the example embodiments of the present disclosure. It also needs to be understood that in this context, when an element or feature is referred to as being "on," "under," or "inside" or "outside" another element(s), it is not only a direct connection In other (one or more) elements "on", "under" or "inside", "outside", it can also be indirectly connected to another (one or more) elements "on", "under" or "outside" through intermediate elements inside and outside".

An exemplary embodiment of the present disclosure provides a battery device. As shown in FIGS. 1-6 , the battery device includes a plurality of battery packs and a bus bar assembly 100. The bus bar 110 is used to electrically connect the batteries in the battery pack; the output bus bar 120 includes an electrode connection part 121 and a stacked part 122, the electrode connection part 121 is connected to the electrode terminal of the end battery in the battery pack, and the stacked part 122 and the electrode connection part 121 connection, and the lamination part 122 extends toward the direction close to the middle bus bar 110, so that the lamination part 122 covers at least part of the middle bus bar 110, and the end cells in the battery pack are the cells at the end of the battery pack along the column direction.

The battery device provided by the embodiment of the present disclosure includes an intermediate bus bar 110 and an output end bus bar 120. The output end bus bar 120 includes an electrode connection part 121 and a stacking part 122. The electrode connecting portion 122 is connected to the electrode connecting portion 121, and the laminated portion 122 extends toward the direction close to the intermediate bus bar 110, so that at least part of the heat generated by the electrode connecting portion 121 can be transferred to the intermediate bus bar and the intermediate bus bar 110. The battery solves the problem of uneven temperature of multiple batteries in the battery device caused by the large heat generated by the bus bar 120 at the output end, and improves the temperature consistency in the battery device.

Further, the battery device provided by the embodiment of the present disclosure may also include a box body, a plurality of battery packs, a liquid cooling plate 30, an electrical component 20 and a conductive bar assembly 40, the box body has a housing space, and a plurality of battery packs are arranged in the housing The liquid cooling plate 30 is arranged between two adjacent rows of batteries. The busbar assembly 100 can be arranged at the end of the battery pack away from the box, the electrical assembly 20 is arranged at the side of the busbar away from the battery pack, and the conductive bar assembly 40 connects the electrical assembly 20 and the busbar assembly 100 .

Each part of the battery device provided by the embodiments of the present disclosure will be described in detail below:

The bus bar assembly 100 provided by the embodiment of the present disclosure is used in a battery device. The battery device may include a plurality of battery packs, and the plurality of battery packs are arranged along a first direction. The battery pack includes at least one row of batteries, and a row of batteries includes a plurality of batteries. The plurality of batteries are arranged along the second direction. The first direction and the second direction are vertically arranged. When the battery pack includes multiple rows of batteries, the multiple rows of batteries are arranged along the first direction.

The middle bus bar 110 may include a plurality of bus units 111, and the bus units 111 are used to connect adjacent batteries in the battery pack. For example, the confluence unit 111 may include a pole connecting portion 101 and a housing connecting portion 102 , and the pole connecting portion 101 is connected to the housing connecting portion 102 . The pole connection part 101 is used to connect the pole of the first battery, and the case connection part 102 is used to connect the case of the second battery. The first battery and the second battery are two adjacent batteries in a row of batteries.

Wherein, the bus unit 111 can be used to connect two adjacent rows of batteries in the battery pack. The confluence unit 111 is provided with a plurality of pole connecting parts 101 and a plurality of housing connecting parts 102, the plurality of pole connecting parts 101 are respectively connected to the poles of a plurality of batteries in a row of batteries, and the plurality of housing connecting parts 102 are respectively connected Housing for multiple cells in another row of cells.

It should be noted that, in the embodiment of the present disclosure, when multiple columns of batteries in the battery pack are aligned and distributed, a row of batteries is a row of batteries arranged in a straight line. When multiple columns of batteries in the battery pack are misplaced, a row of batteries is a row of batteries distributed in broken lines. Multiple batteries in one row have the same positions in their corresponding columns. For example, a column of batteries has N batteries, and the numbers of batteries in a column of batteries along the second direction are 1-N. At this time, there are N rows of batteries in the battery pack , the cells in each row have the same number in their corresponding column.

The output terminal bus bar 120 includes an electrode connection part 121 and a lamination part 122, the electrode connection part 121 is arranged at the end of the intermediate bus bar 110, the electrode connection part 121 is used to connect the electrode of the battery, and the lamination part 122 is connected with the electrode connection part 121, And the lamination portion 122 extends toward the direction close to the intermediate bus bar 110 , so that the lamination portion 122 covers at least part of the intermediate bus bar 110 . On the one hand, the laminated part 122 can transfer the heat generated by the output bus bar 120 to the middle bus bar 110 to improve the temperature uniformity of the battery device; on the other hand, the laminated part 122 can also increase the cross-sectional area of the output bus bar 120 , so as to improve the over-current capability of the bus bar 120 at the output end.

The electrode connection portion 121 of the output bus bar 120 includes a plurality of sub-electrode connection portions 121 , each sub-electrode connection portion 121 corresponds to a row of batteries, and each sub-electrode is connected to an electrode of an end cell in a row of batteries.

The stacked portion 122 covers at least one bus unit 111 , that is, the stacked portion 122 covers at least one row of batteries close to the output bus bar 120 . Preferably, the lamination part 122 covers the bus unit 111 adjacent to the electrode connection part 121 . The laminated part 122 covers the bus unit 111 adjacent to the electrode connection part 121, which can effectively control the weight of the laminated part 122, avoiding the problem that the laminated part 122 is too heavy caused by the excessively large laminated part 122, and is conducive to improving the energy of the battery device density.

There is a gap between the laminated portion 122 and the intermediate bus bar 110 , and an insulating layer is disposed in the gap. A gap is provided between the laminated portion 122 and the intermediate bus bar 110 to prevent the internal short circuit of the battery device caused by the contact between the laminated portion 122 and the intermediate bus bar 110 .

Wherein, the insulating layer between the lamination part 122 and the intermediate bus bar 110 may be an air layer. Alternatively, the insulating layer between the laminated portion 122 and the intermediate bus bar 110 may also be a solid insulating layer, for example, the insulating layer may be a rubber layer, a plastic layer, or a ceramic layer.

The output terminal bus bar 120 is used for connecting adjacent battery packs and outputting electric signals of a battery array formed by a plurality of battery packs. The output terminal bus bar 120 may include a first bus bar 201 and a second bus bar 202, and the electrode connection portion 121 of the first bus bar 201 is used to connect the shells of a row of batteries close to the first bus bar 201 in the first battery pack, Moreover, the laminated portion 122 of the first bus bar 201 is insulated from the pole of the battery. The electrode connection portion 121 of the second bus bar 202 is connected to the poles of a row of batteries close to the second bus bar 202 in the second battery pack, and the laminated portion 122 of the second bus bar 202 is insulated from the casing of the battery, the first battery pack and the second battery pack are any two battery packs in the battery device.

Exemplarily, in the embodiment of the present disclosure, the pole of the battery is the positive electrode of the battery, and the case of the battery is the positive electrode of the battery. On this basis, the first bus bar 201 is the bus bar at the negative output end, and the second bus bar 202 is the bus bar at the positive output end.

A pole avoidance portion 123 is disposed on the lamination portion 122 of the first bus bar 201 to realize insulation between the lamination portion 122 and the pole. There is a height difference between the electrode connection part 121 and the lamination part 122 in the first bus bar 201 , and the lamination part 122 protrudes from the side of the electrode connection part 121 away from the battery.

Wherein, the pole avoiding portion 123 can be a pole-like structure, for example, the pole is in the form of a cylinder, and the pole avoiding portion 123 can be an arc-shaped concave portion, and the radius of the arc-shaped depression is larger than the radius of the pole. There is a gap between the first bus bar 201 and the middle bus bar 110 , that is, the first bus bar 201 and the middle bus bar 110 are insulated.

The electrode connection portion 121 of the second bus bar 202 has a connection protrusion 124 facing the battery, and the connection protrusion 124 is connected to the pole. The area of the side of the connecting protrusion 124 facing the pole is less than or equal to the area of the side of the pole facing the second bus bar 202 .

Wherein, the structure of the connection protrusion 124 can match the structure of the pole. For example, when the pole is a cylindrical pole, the connecting protrusion 124 may be a cylindrical protrusion; when the pole is a square pole, the connecting protrusion 124 may be a profiling protrusion.

In order to improve the installation accuracy of the bus bar 120 at the output end, positioning holes may be provided on the bus bar 120 at the output end. For example, the positioning hole can be provided on the connecting protrusion 124, and the shape of the positioning hole can match the shape of the pole.

In a feasible implementation manner of the present disclosure, the first busbar 201 is a first total output busbar 203, and the first total output busbar 203 is provided with a first bending part 125, and the first bending part 125 is used for The electrical components 20 are connected; the second busbar 202 is the second total output busbar 204 , and the second total output busbar 204 is provided with a second bending part 126 for connecting with the electrical component 20 . That is, at least one first bus bar 201 has a first total output bus bar 203 , and at least one second bus bar 202 has a second total output bus bar 204 .

Wherein, the first bent portion 125 is located at the side of the battery array, and the second bent portion 126 is located at the side of the battery array. The first bending part 125 and the second bending part 126 are respectively connected to the conductive bars, so as to realize the connection between the first total output terminal bus bar 120 and the electrical component 20 and the connection between the second total output terminal bus bar 120 and the electrical component 20 .

Exemplarily, the first total output terminal bus bar 120 is the total negative output terminal bus bar, and the second total output terminal bus bar 120 is the total positive output terminal bus bar 120 . The total positive output terminal bus bar is connected to the total positive electrode of the battery array formed by connecting multiple battery groups, and the total negative output terminal bus bar is connected to the total negative electrode of the battery array formed by multiple battery groups. For example, a plurality of battery packs may be connected in series, and the bus bar of the total positive output terminal and the bus bar of the total negative output terminal are respectively connected to the start end and the end end of the series batteries.

The total negative output terminal bus bar is arranged on the top of the battery array, the total negative output terminal bus bar is provided with a first bending part 125, the first bending part 125 is connected with the total negative output terminal bus bar, and the first bending part 125 extends to the side close to the bottom plate.

The total positive output terminal busbar is arranged on the top of the battery array. A second bent portion 126 is provided on the overall positive output end busbar, and the second bent portion 126 is connected to the overall positive output end busbar, and the second bent portion 126 extends to a side close to the bottom plate.

In another feasible implementation manner of the present disclosure, the first bus bar 201 and the second bus bar 202 are connected to form a jumper bus bar, and the jumper bus bar is used to connect two adjacent battery packs. Two adjacent battery packs are connected in series by connecting the bus bars.

Wherein, the first bus bar 201 and the second bus bar 202 in the jumper bus bar may be an integral structure, for example, the jumper bus bar may be formed by stamping or casting. Alternatively, the first bus bar 201 and the second bus bar 202 in the cross-over bus bar may also have a split structure, for example, the first bus bar 201 and the second bus bar 202 may be connected by means of welding or the like.

The end of the output bus bar 120 away from the middle bus bar 110 is provided with an escape groove. The escape groove is used to expose the joint between the liquid cooling plate 30 and the battery case, so as to facilitate the connection between the liquid cooling plate 30 and the battery case.

Wherein, when the battery is a cylindrical battery, at least one section of the avoidance groove is arc-shaped, and the arc matches the cylindrical surface of the end battery to expose the battery and the liquid-cooled plate 30 when the battery and the liquid-cooled plate 30 are welded. connection, and also play a guiding role during welding.

A plurality of battery packs are arranged in the accommodation space of the box body, and the plurality of battery packs are arranged along a first direction, and the battery pack includes at least one row of batteries, and a plurality of batteries in a row of batteries are arranged along a second direction, and the second direction and the first direction vertical. When the battery pack includes multiple columns of batteries, the multiple columns of batteries are arranged along the first direction. In practical application, the battery assembly can also be formed by multiple rows of batteries, and the multiple rows of batteries are divided into at least two battery groups.

For example, the first direction may be the direction of the long side of the bottom plate, and the second direction may be the direction of the short side of the bottom plate. Multiple battery packs are arranged in sequence along the long side of the bottom plate, and multiple batteries in a row of batteries are arranged along the short side of the bottom plate.

Wherein, in the embodiment of the present disclosure, the multiple rows of batteries in the battery pack may be arranged in alignment, or the multiple rows of batteries in the battery pack may be arranged in a misaligned manner. When the batteries in the battery pack are cylindrical batteries, in order to improve the space utilization rate in the battery device, the batteries in two adjacent rows can be arranged in a dislocation. For example, the diameter of the cells in the first row is tangent to the cells in the second row in the first direction. The number of columns and arrangement of batteries in multiple battery packs can be the same.

The battery can be bonded to the bottom plate. For example, a battery accommodating portion is provided on the bottom plate, and a connecting glue layer is arranged on the battery accommodating portion, and the battery and the bottom plate are connected through the connecting glue layer.

Exemplarily, the battery provided by the embodiments of the present disclosure may include a casing, a cell and a pole, the casing has an accommodating cavity, the cell is set in the cavity in the casing, the pole is set in the casing, and the pole At least partly protrudes into the accommodating cavity.

The casing is used to form the outer contour of the battery and protect the components inside the battery. The housing is a hollow columnar structure. For example, the housing can include a main body, a first end plate and a second end plate. The main body of the shell is a columnar structure with openings at both ends. both ends.

Wherein, in the embodiment of the present disclosure, the shell main body, the first end plate and the second end plate may be of an integral structure, or the shell main body and the first end plate or the second end plate may be of an integral structure. The material of the housing is a metal material, for example, the material of the housing may be steel, aluminum, copper or silver.

When the pole is the first electrode of the battery and the casing is the second electrode of the battery, it is necessary to insulate the pole and the battery casing. For example, an insulator can be provided between the pole and the shell to achieve insulation between the battery shell and the pole.

It is worth noting that, in the above embodiments, the battery is described as an example of a cylindrical battery, but the battery in the embodiments of the present disclosure is not limited to a cylindrical battery, and the battery may also be a square battery in practical applications.

The liquid cooling plate 30 is arranged along the second direction, and the liquid cooling plate 30 is located between two adjacent rows of batteries, and the end of the output bus bar 120 away from the middle bus bar 110 is provided with an escape groove, and the liquid cooling plate 30 is located at the output end. The projected part on the bus bar 120 is located in the escape groove.

The escape groove is used to expose the joint between the liquid cooling plate 30 and the battery case, so as to facilitate the connection between the liquid cooling plate 30 and the battery case. Wherein, when the battery is a cylindrical battery, at least one section of the avoidance groove is arc-shaped, and the arc matches the cylindrical surface of the end battery to expose the battery and the liquid-cooled plate 30 when the battery and the liquid-cooled plate 30 are welded. connection, and also play a guiding role during welding.

The liquid cooling plate 30 is arranged between two adjacent rows of batteries. The two ends of the liquid cooling plate 30 are respectively provided with a liquid inlet and a liquid outlet. Liquid cooling channel. The cooling liquid enters the liquid cooling plate 30 from the liquid inlet, and passes through the liquid cooling channel to the liquid outlet.

Wherein, 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 spaced apart from the batteries, that is, there is a row of batteries between two adjacent liquid cooling plates 30 . Alternatively, multiple rows of batteries may also be arranged between two adjacent liquid cooling plates 30 , which is not specifically limited in this embodiment of the present disclosure.

The conductive bar assembly 40 includes a first conductive bar 41 and a second conductive bar 42, the first conductive bar 41 is connected to the first total output terminal bus bar 120 and the electrical assembly 20, and the second conductive bar 42 is connected to the second total output terminal bus bar 120 and electrical components 20.

When the first total output busbar 120 is provided with the first bent part 125, the first conductive bar 41 can connect the first bent part 125 and the electrical component 20, and the second total output busbar 120 is provided with the first bent part 125. When the second bent portion 126 is formed, the second conductive bar 42 can connect the second bent portion 126 and the electrical component 20 .

The first conductive row 41 and the second conductive row 42 can be metal conductive rows, for example, the materials of the first conductive row 41 and the second conductive row 42 can be copper, iron, aluminum, silver, tungsten, nickel, cadmium and titanium, etc. One or more of the metal materials.

The electrical component 20 may include a battery management system and a connector, and the battery management system and the connector are arranged on the installation panel. The conductive bar can be connected to the connector, and the connector is also connected to the output interface, and the output interface is used for connecting external devices.

An embodiment of the present disclosure provides a battery device, which includes a busbar assembly 100, the busbar assembly 100 includes an intermediate busbar 110 and an output busbar 120, and the output busbar 120 includes an electrode connection part 121 and a stacked part 122 , the electrode connecting portion 121 is arranged at one end of the intermediate bus bar 110, the laminated portion 122 is connected to the electrode connecting portion 121, and the laminated portion 122 extends toward the direction close to the intermediate bus bar 110, so that at least part of the electrode connecting portion 121 can be The heat is transmitted to the intermediate bus bar and the battery connected to the intermediate bus bar 110 , which solves the problem of uneven temperature of the battery device caused by the high heat generated by the output bus bar 120 , and improves the consistency of the temperature in the battery device.

The battery device provided by the embodiments of the present disclosure may be applied to an electric vehicle. When the battery device is used in an electric vehicle, the battery device may be a battery pack installed on the electric vehicle to provide energy for the electric vehicle.

In practical application, the battery pack can be mounted on the frame of the electric vehicle. The battery pack can be fixedly connected to the frame. Alternatively, the battery pack may be a modular battery pack, which can be detachably connected to the vehicle body for easy replacement.

Other embodiments of the present disclosure will be readily 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 modification, use or adaptation of the present disclosure, and these modifications, uses or adaptations follow the general principles of the present disclosure and include common knowledge or conventional technical means in the technical field not disclosed in the present disclosure . The specification and examples are to be considered exemplary only, with the true scope and spirit of the disclosure indicated by the appended claims.

Claims (15)

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

a plurality of battery packs;

a busbar assembly including an intermediate busbar for electrically connecting cells in the battery pack and an output busbar including an electrode connecting portion connecting electrode terminals of end cells in the battery pack and a laminated portion connected to the electrode connecting portion and extending in a direction approaching the intermediate busbar such that the laminated portion covers at least a portion of the intermediate busbar.

2. The battery device according to claim 1, wherein the intermediate bus bar includes a plurality of bus units for connecting the cells of the adjacent row in the battery pack, and the laminated portion covers at least one of the bus units.

3. The battery device according to claim 2, wherein the lamination portion covers the bus bar unit adjacent to the electrode connection portion.

4. The battery device according to claim 1, wherein a gap is provided between the laminated portion and the intermediate bus bar, and an insulating layer is provided in the gap.

5. The battery device of claim 1, wherein the output bus bar comprises:

and the electrode connecting part of the first bus bar is used for connecting a shell of an end battery in the first battery pack, and the laminated part of the first bus bar is insulated from a pole of the battery.

6. The battery device according to claim 5, wherein a pole escape portion is provided on the laminated portion of the first bus bar to insulate the laminated portion from the pole.

7. The battery device of claim 5, wherein the output bus bar comprises:

and the electrode connecting part of the second bus bar is connected with the pole of the end battery in the second battery pack, the laminated part of the second bus bar is insulated from the shell of the battery, and the first battery pack and the second battery pack are any two battery packs in the battery device.

8. The battery device according to claim 7, wherein the electrode connecting portion of the second bus bar has a connecting projection facing the battery, and the connecting projection is connected to the pole.

9. The battery device according to claim 8, wherein an area of a face of the connection projection facing the pole is equal to or smaller than an area of a face of the pole facing the second bus bar.

10. The battery device according to claim 7, wherein the first bus bar is a first total output bus bar, and a first bending portion is disposed on the first total output bus bar and is used for connecting with an electrical component;

the second busbar is the total output busbar of second, be provided with the second kink on the total output busbar of second, the second kink is used for being connected with electric component.

11. The battery device of claim 7, wherein the first bus bar and the second bus bar are connected to form a cross-over bus bar, the cross-over bus bar being used to connect two adjacent battery packs.

12. The battery device of claim 1, wherein the electrode connection portion comprises a plurality of sub-electrode connection portions, each sub-electrode connection portion corresponding to a column of cells, and each sub-electrode connection portion is connected to an electrode of an end cell in the column of cells.

13. The battery device of claim 1 wherein an end of said output terminal bus bar distal from said intermediate bus bar is provided with an escape recess.

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

the liquid cooling plate is located between two adjacent batteries, the output busbar is far away from one end of the middle busbar is provided with an avoiding groove, and the projection part of the liquid cooling plate on the output busbar is located in the avoiding groove.

15. The battery device of any of claims 1-14, wherein the battery is a cylindrical battery.

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