CN217788743U - Battery device - Google Patents

Abstract

The utility model relates to a battery technology field provides a battery device. The battery device includes: the battery box body comprises a bottom plate; the battery is stacked on the bottom plate along a first direction and provided with two first side surfaces which are oppositely arranged and four second side surfaces which are connected end to end, the four second side surfaces are arranged between the two first side surfaces, the surface area of the first side surfaces is larger than that of the second side surfaces, and two ends of the battery along the first direction are respectively provided with two pole columns; the low-voltage signal acquisition assembly comprises a flexible wiring harness, the flexible wiring harness is electrically connected with the pole, and the flexible wiring harness is arranged on a first side surface of the battery which is positioned at the uppermost end along the first direction; the first direction is perpendicular to the bottom plate, and the first direction is perpendicular to the first side face. The pole adopts a structure with two leading-out ends, so that the interference of the pole during installation is avoided. The flexible wiring harness adopts a top leading-out mode, and the flat cable arrangement of the flexible wiring harness can be facilitated even after the battery is put into the box.

Description

Battery device

Technical Field

The utility model relates to a battery technology field especially relates to a battery device.

Background

In the correlation technique, when the battery device needs to carry out performance detection, if the texture of collection subassembly is softer, can't realize self-supporting, bring very big difficulty for the assembly of collection subassembly and battery, lead to production efficiency ratio lower.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery device, the assembly of being convenient for improves production efficiency.

According to a first aspect of the present invention, there is provided a battery device, comprising:

a battery case comprising a bottom plate;

the plurality of batteries are stacked on the bottom plate along a first direction, each battery is provided with two first side surfaces which are oppositely arranged and four second side surfaces which are connected end to end, the four second side surfaces are arranged between the two first side surfaces, the surface area of each first side surface is larger than that of each second side surface, and two ends of each battery along the first direction are respectively provided with two polar columns;

the low-voltage signal acquisition assembly comprises a flexible wiring harness, the flexible wiring harness is electrically connected to the pole, and the flexible wiring harness is arranged on the first side face of the battery which is positioned at the uppermost end along the first direction;

the first direction is perpendicular to the bottom plate, and the first direction is perpendicular to the first side face.

The utility model discloses battery device piles up along the first direction through a plurality of batteries and sets up in the bottom plate, and the bottom plate plays the effect that bears a plurality of batteries, and support effect is good, and a plurality of batteries superpose from top to bottom along the first direction and set up on the bottom plate, borrow high space, save area. The appearance of battery is similar to the cuboid structure, through two first sides and four end to end's the second side that set up relatively, and four second sides set up between two first sides, and two first sides and four second sides form six surfaces of cuboid structure, and the surface area through first side is greater than the surface area of second side, and the surface area of first side is bigger, and first side also can be called as the big face.

Two ends of the battery along the first direction are respectively provided with two pole columns, so that the distance between the two pole columns is large, and the pole columns adopt a two-end leading-out structure, so that the situation that the pole columns are interfered when being installed is avoided. The flexible wiring harness is electrically connected with the pole, and the flexible wiring harness can collect various performance indexes of the battery through the pole and is used for representing the actual use condition of the battery. Set up in the first side that lies in along the battery of first direction uppermost through flexible pencil, the first side of battery provides one for flexible pencil and places the position, guarantee the supporting effect to flexible pencil, because the surface area of first side is bigger, first side provides great arrangement space for flexible pencil, and flexible pencil sets up on the battery of uppermost end, be equivalent to flexible pencil adoption top mode of drawing forth, even also can make things convenient for the winding displacement of flexible pencil to arrange after the battery is gone into the case, can avoid the battery inflation to drag flexible pencil simultaneously, arouse flexible pencil fracture.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

FIG. 1 is a schematic diagram illustrating the construction of a battery device according to an exemplary embodiment;

FIG. 2 is an enlarged partial schematic view of FIG. 1;

FIG. 3 is a schematic diagram illustrating the configuration of a battery cell within a battery receiving compartment of a battery device according to an exemplary embodiment;

fig. 4 is a partially enlarged schematic view of fig. 3.

The reference numerals are illustrated below:

1. a battery case; 2. a battery cell; 3. a low voltage signal acquisition component; 4. a conductive member;

11. a base plate; 12. a frame; 13. a battery housing compartment;

21. a battery; 211. a first side surface; 212. a second side surface; 213. a pole column;

31. a flexible wire harness; 32. connecting sheets; 33. collecting branches; 34. and (4) an output end.

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 otherwise explicitly specified or limited, the terms "first", "second", and "first" 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, references to "the" object or "an" object are also intended to mean one of possibly multiple such objects.

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 is to 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 this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

An embodiment of the utility model provides a battery device, please refer to fig. 1 to fig. 3, battery device includes battery box 1, low voltage signal gathers subassembly 3 and a plurality of battery 21, battery box 1 includes bottom plate 11, a plurality of battery 21 stack along the first direction and set up in bottom plate 11, battery 21 has the first side 211 of two relative settings and the second side 212 that four end to end connect, four second side 212 set up between two first sides 211, the surface area of first side 211 is greater than the surface area of second side 212, battery 21 is provided with two utmost points post 213 respectively along the both ends of first direction. The low-voltage signal acquisition assembly 3 comprises a flexible wiring harness 31, the flexible wiring harness 31 is electrically connected with the pole 213, and the flexible wiring harness 31 is arranged on the first side surface 211 of the battery 21 which is positioned at the uppermost end along the first direction; the first direction is perpendicular to the bottom plate 11, and the first direction is perpendicular to the first side surface 211.

According to the battery device provided by the embodiment, the plurality of batteries 21 are stacked and arranged on the bottom plate 11 along the first direction, the bottom plate 11 plays a role of bearing the plurality of batteries 21, the supporting effect is good, the plurality of batteries 21 are stacked and arranged on the bottom plate 11 along the first direction, the height space is used, and the occupied area is saved. The battery 21 has an appearance similar to a rectangular parallelepiped structure, and includes two first side surfaces 211 and four second side surfaces 212 connected end to end, where the four second side surfaces 212 are disposed between the two first side surfaces 211, the two first side surfaces 211 and the four second side surfaces 212 form six surfaces of the rectangular parallelepiped structure, and the surface area of the first side surface 211 is larger than that of the second side surface 212, and the first side surface 211 may also be referred to as a large surface.

Two ends of the battery 21 in the first direction are respectively provided with two poles 213, so that the distance between the two poles 213 is relatively large, and the poles 213 adopt a two-end leading-out structure, thereby avoiding the interference of the poles 213 during installation. The flexible wire harness 31 is electrically connected to the pole 213, and the flexible wire harness 31 can collect various performance indexes of the battery 21 through the pole 213, so as to represent the actual use condition of the battery 21. Set up in the first side 211 that lies in the battery 21 along the first direction uppermost end through flexible pencil 31, the first side 211 of battery 21 provides one for flexible pencil 31 and places the position, guarantee the supporting effect to flexible pencil 31, because the surface area of first side 211 is bigger, first side 211 provides great arrangement space for flexible pencil 31, and flexible pencil 31 sets up on the battery 21 of the uppermost end, be equivalent to flexible pencil 31 and adopt the mode that the top was drawn forth, even also can make things convenient for the winding displacement of flexible pencil 31 to arrange after battery 21 is built-in, can avoid battery 21 inflation to pull flexible pencil 31 simultaneously, arouse flexible pencil 31 fracture.

The battery 21 includes, among other things, a cell and an electrolyte, and is a minimum unit capable of performing an electrochemical reaction such as charging/discharging. The cell refers to a unit formed by winding or laminating a stack including a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein the polarities of the first electrode and the second electrode can be interchanged.

In one embodiment, the cells 21 are stacked cells, which not only facilitate grouping, but also allow longer length cells 21 to be processed.

Specifically, electric core is lamination formula electric core, and electric core has first pole piece that stacks up each other, with first pole piece opposite electric property's second pole piece and the diaphragm of setting between first pole piece and second pole piece to make many to pile up and form lamination formula electric core to first pole piece and second pole piece.

Optionally, the battery 21 may be a winding battery, that is, a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a winding battery core.

It should be particularly noted that, the battery 21 provided in this embodiment is specifically a rectangular battery, and the height direction of the battery 21 is defined, that is, the stacking direction of the plurality of batteries 21 is a first direction, the length direction of the batteries 21 is a second direction, and the width direction of the batteries 21 is a third direction, where the first direction, the second direction, and the third direction are perpendicular to each other two by two, and the first direction, the second direction, and the third direction only represent a spatial direction, and have no substantial meaning.

In one embodiment, as shown in fig. 1-3, two poles 213 are disposed on opposite sides of the first side 211; or, the two poles 213 are disposed on two opposite sides of the second side surface 212; or, the two poles 213 are respectively disposed on the first side surface 211 and the second side surface 212.

Set up in first side 211 through utmost point post 213, utmost point post 213 sets up in the great face of surface area ratio promptly, and first side 211 is great for the position scope that sets up that first utmost point post 213 provided, provides great installation space for the installation between utmost point post 213 and other conductive element, the installation of utmost point post 213 of being convenient for. Meanwhile, the two poles 213 are respectively arranged on two opposite sides of the first side surface 211, so that the distance between the two poles 213 is relatively large, and the situation that the poles 213 interfere during installation is avoided.

The pole 213 is disposed on the second side surface 212, that is, the pole 213 is disposed on a narrow surface with a relatively small surface area, and whether the pole 213 is disposed on a large surface or a narrow surface is not limited in this embodiment, as long as the two ends of the pole 213 can be led out within the protection range of this embodiment.

It should be noted that the projections of the two poles 213 on the reference plane may coincide with each other, or the projections of the two poles 213 on the reference plane may not coincide, wherein the reference plane is parallel to the plane in which the first direction and the third direction are located. In other words, the two poles 213 may be disposed facing each other or may be staggered from each other, and the positions of the two poles 213 are not limited and may be adjusted according to actual production conditions.

In one embodiment, two flexible harnesses 31 are disposed on opposite sides of the first side 211.

When a plurality of batteries 21 are connected in series or in parallel, two poles 213 of the same battery 21 are respectively and correspondingly connected to the two flexible wire harnesses 31, so that the two flexible wire harnesses 31 can respectively collect data on two sides of the battery 21, the independence is good, and the occurrence of mutual influence and interference is avoided.

In one embodiment, the low voltage signal acquisition assembly 3 further comprises a connecting piece 32, and the flexible wiring harness 31 is electrically connected to the pole 213 of the battery 21 through the connecting piece 32.

Because there is certain distance between utmost point post 213 and the flexible pencil 31, lie in between utmost point post 213 and the flexible pencil 31 through the connection piece 32, connection piece 32 plays intermediate junction's effect to carry out electric connection with flexible pencil 31 and utmost point post 213, guarantee the reliability of being connected between utmost point post 213 and the flexible pencil 31.

In one embodiment, the poles 213 of two adjacent batteries 21 are connected by the connecting sheet 32, and the flexible wire harness 31 is electrically connected to the connecting sheet 32. Wherein the connecting sheet 32 is specifically a nickel sheet.

After the batteries 21 are stacked along the first direction, the connecting sheet 32 is used for electrically connecting the pole posts 213 of the two adjacent batteries 21, the batteries 21 are electrically connected, the flexible wiring harness 31 is electrically connected to the connecting sheet 32, the process that the flexible wiring harness 31 collects signals of the batteries 21 through the connecting sheet 32 is completed, the connecting sheet 32 is used for electrically connecting the pole posts 213 of the batteries 21 and the flexible wiring harness 31, and the connecting sheet 32 has multiple purposes and is relatively high in functionality.

It should be noted that if the terminal 213 is disposed on the edge of the second side 212 or the first side 211, the connecting sheet 32 has a strip structure, the connecting sheet 32 extends along the first direction, and the connecting sheet 32 can be sequentially connected to a plurality of terminals 213 stacked along the first direction for disposing the battery 21.

It should be noted that the connecting sheet 32 may be directly connected to the poles 213 of the batteries 21, or the poles 213 of two adjacent batteries 21 may be connected through the conductive member 4, the conductive member 4 includes but is not limited to a bus bar, etc., the connecting sheet 32 is electrically connected to the conductive member 4, the conductive member 4 plays a role of intermediate connection, and signal acquisition for the poles 213 of two adjacent batteries 21 is realized through the conductive member 4 by using one connecting sheet 32.

Wherein, electrically conductive 4 includes main part and two linking arms, and two linking arms set up perpendicularly in the both sides of main part along first direction, make electrically conductive 4's cross section similar to U-shaped structure, and two linking arms correspond respectively and connect in the utmost point post 213 of two adjacent batteries 21, and the main part is used for the electricity to connect in connection piece 32, and the main part provides the mounted position for connection piece 32, provides very big convenience for the electric connection of utmost point post 213 and connection piece 32.

In one embodiment, as shown in fig. 3-4, the low voltage signal collection assembly 3 further includes a collection branch 33, the flexible wiring harness 31 is electrically connected to the connection pad 32 through the collection branch 33, and the connection pad 32 is electrically connected to the terminal 213 of the battery 21.

Because the pole 213 of the battery 21 may not protrude from the second side surface 212, but the pole 213 is disposed at the edge of the first side surface 211, which is equivalent to the pole 213 being recessed between two adjacent batteries 21, if the connecting sheet 32 is connected to the pole 213 and the flexible wire harness 31 at the same time, the precise positioning ratio of the two ends of the connecting sheet 32 is higher, and the length of the connecting sheet 32 along the first direction is longer, which is easy to break. For this reason, the connection piece 32 that this embodiment provided constitutes jointly with gathering branch road 33 and gathers the end, and connection piece 32 and gathering branch road 33 are split type structure, and connection piece 32 is smaller with the size of gathering branch road 33, and the control of error when being convenient for produce and process, and connection piece 32 and gather branch road 33 and can install in proper order, avoid appearing the condition of rupture because of length is longer. The connecting sheet 32 is electrically connected with the pole 213 of the battery 21, the connecting sheet 32 realizes leading out the current of the pole 213 in the battery 21, the connecting sheet 32 is electrically connected with the flexible branch through the collecting branch 33, and the collecting branch 33 plays a role in switching between the connecting sheet 32 and the flexible wiring harness 31.

In one embodiment, the number of the connecting pieces 32 is multiple, and one end of the connecting pieces 32 is electrically connected to the pole 213 of the plurality of batteries 21 and the other end is electrically connected to the collecting branch 33.

The number of the connecting sheets 32 corresponds to the number of the batteries 21, one end of each connecting sheet 32 is electrically connected to the poles 213 of the batteries 21, each connecting sheet 32 corresponds to one pole 213 of one battery 21, the independence of information acquisition of the poles 213 of the batteries 21 is ensured, the signal interference is avoided, and one pole 213 of each battery 21 and the corresponding connecting sheet 32 form a branch. The other end through a plurality of connection pieces 32 is connected in gathering branch circuit 33 in the electricity, gathers branch circuit 33 in other words and integrates a plurality of branch circuits, plays the effect that the signal of telecommunication was gathered.

In one embodiment, the collecting branches 33 corresponding to the connecting sheets 32 are of an integrally formed structure, or the collecting branches 33 corresponding to the connecting sheets 32 are of a split structure.

If the collecting branch 33 corresponding to the plurality of connecting sheets 32 is of a split structure, the number of the collecting branch 33 is also multiple, one end of each connecting sheet 32 is correspondingly electrically connected to one pole 213 of the battery 21, and the other end of each connecting sheet 32 is correspondingly electrically connected to one collecting branch 33. At this time, the end of the collecting branch 33 not connected to the connecting piece 32 is electrically connected to the flexible harness 31, which is equivalent to collecting signals at the position of the flexible harness 31.

If the collection branch 33 corresponding to the plurality of connection pieces 32 is of an integrally formed structure, the number of the collection branch 33 is one, one end of each connection piece 32 is correspondingly electrically connected to one pole 213 of the battery 21, and the other end of each connection piece 32 is correspondingly electrically connected to the same collection branch 33, that is, the plurality of connection pieces 32 share the same collection branch 33, which is equivalent to realize signal collection at the position of the collection branch 33.

In one embodiment, the collecting branch 33 is any one of a PCB, an FPC and an FFC.

If the collecting branch 33 is directly of a structure similar to a monolithic PCB, which may also be called a printed circuit board or PCB, the PCB may serve as a support for the connecting piece 32 and as a carrier for the electrical interconnection of the connecting piece 32 and the flexible wire bundle 31.

If the collecting branch 33 is FPC or FFC, a plurality of branches are merged into a main path structure. Specifically, the FPC or FFC is specifically a cable, the cable includes sheath and cable, the cable sets up in the sheath, the sheath plays the effect of protection cable, in initial state, can think that the length of cable and sheath is unanimous, when needs electric connection, the both ends of cable are total end and branch end respectively, the total end direct electricity of cable is connected in flexible pencil 31, will be located the branch of cable and hold outside sheath to peel off for the cable branch is in the exposed state for the external environment, each branch road that the cable was divided at this moment is in the dispersed state, be convenient for each branch road correspond the utmost point post 213 of electricity connection in each battery 21.

In one embodiment, as shown in fig. 2 to 3, a plurality of batteries 21 are stacked in a first direction to form battery units 2, and adjacent two battery units 2 are connected by a flexible harness 31.

If the number of the battery units 2 is multiple, two adjacent battery units 2 are connected through the flexible wiring harness 31, the flexible wiring harness 31 plays a role in bridging two adjacent battery units 2, so that the flexible wiring harness 31 can be correspondingly and electrically connected to the multiple battery units 2, signals of the batteries 21 of the multiple battery units 2 are acquired, and the functionality of the flexible wiring harness 31 is relatively strong.

It is understood that, if the plurality of battery cells 2 are sequentially arranged in the third direction, the flexible harness 31 extends in the third direction; if the plurality of battery cells 2 are sequentially arranged in the second direction, the flexible harness 31 extends in the second direction.

It is understood that the flexible wire harness 31 may be a split structure, a plurality of flexible wire harnesses 31 are correspondingly connected to a plurality of battery units 2, and two adjacent flexible wire harnesses 31 are electrically connected to each other; the flexible wire harness 31 may also be an integrally formed structure, and one flexible wire harness 31 is electrically connected to a plurality of battery units 2 correspondingly, i.e. a plurality of battery units 2 share the same flexible wire harness 31.

It should be noted that, a frame 12 and a partition beam (as shown in fig. 1 and fig. 2) are disposed in the battery case 1 of the battery device, the frame 12 is disposed on the bottom plate 11, and the frame 12 surrounds the battery unit 2 to serve as a side protection. Separate the roof beam and set up on bottom plate 11 and set up in the inside of frame 12, separate the roof beam and separate into a plurality of batteries with battery box 1's cavity and hold storehouse 13, every battery holds storehouse 13 and is used for holding a plurality of battery unit 2, and every battery holds flexible pencil 31 that storehouse 13 corresponds and is the integrated into one piece structure, and different batteries hold flexible pencil 31 that storehouse 13 corresponds and be split type structure.

It can be understood that the widths of the collecting branches 33 corresponding to different battery units 2 along the third direction may be the same or different, and if the number of the collecting branches 33 electrically connected to the connecting sheet 32 is relatively small, the width of the collecting branch 33 along the third direction is relatively small; if the number of the collecting branches 33 electrically connected to the connecting pieces 32 is relatively large, the width of the collecting branch 33 along the third direction is relatively large.

In one embodiment, as shown in fig. 3-4, the low voltage signal acquisition assembly 3 further comprises an output 34, the output 34 being electrically connected to the flexible wiring harness 31. The output end 34 serves as an outgoing end of the flexible wiring harness 31, and the output end 34 can be connected with other electric devices for monitoring index parameters to realize signal transmission of the battery 21.

It is understood that the output end 34 may be disposed at a position opposite to one of the battery units 2, or the output end 34 may be disposed at an outer side of the battery unit 2, that is, for one of the battery accommodating chambers 13, the output end 34 is disposed at an end of the battery accommodating chamber 13 along the third direction, so as to avoid the battery unit 2 interfering with the same.

In one embodiment, the battery device is a battery module including a plurality of batteries 21, and the battery module may further include end plates and side plates for fixing the plurality of batteries 21. A buffer pad may be disposed between the adjacent batteries 21, and a buffer pad may be disposed between the end plate and the battery 21.

In one embodiment, the battery device is a battery pack. By providing the battery 21 in the battery case 1, the battery case 1 protects the battery 21.

When the number of the cells 21 is plural, the plural cells 21 may be arranged in the stacking direction of the cells 21 to form a group of the cells 21 and then the plural cells 21 may be fixed in the cell case 1 by end plates and side plates. When a plurality of cells 21 are directly provided in the battery case 1, that is, without grouping the plurality of cells 21, the end plates and the side plates may be eliminated.

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 disclosure is intended to cover any variations, uses, or adaptations of the invention 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 example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A battery device, comprising:

the battery box body (1), the battery box body (1) comprises a bottom plate (11);

the plurality of batteries (21) are stacked and arranged on the bottom plate (11) along a first direction, each battery (21) is provided with two first side surfaces (211) which are oppositely arranged and four second side surfaces (212) which are connected end to end, the four second side surfaces (212) are arranged between the two first side surfaces (211), the surface area of each first side surface (211) is larger than that of each second side surface (212), and two ends of each battery (21) along the first direction are respectively provided with one pole column (213);

the low-voltage signal acquisition assembly (3) comprises a flexible wiring harness (31), the flexible wiring harness (31) is electrically connected to the pole (213), and the flexible wiring harness (31) is arranged on the first side surface (211) of the battery (21) which is positioned at the uppermost end along the first direction;

wherein the first direction is arranged perpendicular to the bottom plate (11) and the first direction is arranged perpendicular to the first side surface (211).

2. The battery device according to claim 1, wherein two poles (213) are disposed on opposite sides of the first side (211); or the like, or a combination thereof,

the two polar columns (213) are arranged on two opposite sides of the second side surface (212); or the like, or, alternatively,

the two pole posts (213) are respectively arranged on the first side surface (211) and the second side surface (212).

3. The battery device according to claim 1, wherein two flexible harnesses (31) are provided on opposite sides of the first side surface (211).

4. Battery device according to claim 1, characterized in that the low voltage signal acquisition assembly (3) further comprises a connection tab (32), the flexible wiring harness (31) being electrically connected to the pole (213) of the battery (21) through the connection tab (32).

5. A battery device according to claim 4, characterized in that the poles (213) of two adjacent batteries (21) are connected by the connecting piece (32), and the flexible wire harness (31) is electrically connected to the connecting piece (32).

6. Battery device according to claim 4, characterized in that said low voltage signal acquisition assembly (3) further comprises an acquisition branch (33), said flexible wiring harness (31) being electrically connected to said connection tab (32) through said acquisition branch (33), said connection tab (32) being electrically connected to the pole (213) of said battery (21).

7. Battery device according to claim 6, characterised in that said tabs (32) are in a plurality, one end of said tabs (32) being electrically connected to the poles (213) of the batteries (21) and the other end being electrically connected to said collecting branch (33).

8. The battery device according to claim 6, characterized in that the collecting branches (33) corresponding to the connecting sheets (32) are of an integrally formed structure, or the collecting branches (33) corresponding to the connecting sheets (32) are of a split structure.

9. The battery device according to any one of claims 1-8, wherein a plurality of said batteries (21) are stacked in said first direction to form a battery unit (2), and adjacent two of said battery units (2) are connected by said flexible harness (31).

10. The battery device according to any of claims 1 to 8, characterized in that the low voltage signal acquisition assembly (3) further comprises an output (34), the output (34) being electrically connected to the flexible wiring harness (31).

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