CN216120616U

CN216120616U - Battery pack

Info

Publication number: CN216120616U
Application number: CN202122371298.5U
Authority: CN
Inventors: 宋海阳
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2022-03-22
Anticipated expiration: 2031-09-28

Abstract

The utility model provides a battery pack which mainly comprises a shell, a battery module contained in the shell, a controller fixedly connected in the shell, a wiring terminal and a flexible flat cable. The connecting terminal is arranged on a battery cell unit forming the battery module in a horizontal state; a flexible flat cable is connected between the connection terminal and the controller to constitute signal transmission between the battery module and the controller; the flexible flat cable is provided with a transition section connected to the wiring terminal and a connecting section connected between the transition section and the controller; due to the transition section, the connection section is guided downward and attached to the side of the battery module to be held. Through flexible flat cable connection battery module and controller, the space that the cable took in the casing is less, avoids the cable because of the unordered wearing and tearing that cause, reduces the short circuit risk.

Description

Battery pack

Technical Field

The utility model relates to the technical field of battery connection structures, in particular to a battery pack.

Background

In the structural arrangement of the battery pack, a battery pack case, a battery module made up of a plurality of cell units housed in the case, and a controller provided on the battery module are generally included, wherein the controller is generally integrated into a BMS (battery management system), and the voltage of each string of cell units, the temperature inside the battery pack, and the like are monitored from time to time by the BMS. In conventional design, use the pencil to connect the interface of electric core unit and the corresponding interface of BMS among each battery module usually, because the pencil is more, consequently, in order to improve the wholeness of pencil, the pencil is generally tied up the back and is become circular, occupies more space in the battery package, and the pencil adopts the ribbon to fix under the normal condition, needs certain operating space when workman installs the pencil, and assembly efficiency is low. In addition, the wire harness belongs to flexible parts, more tolerance exists in the actual production and installation process, the wire harness is easy to loose after installation, the installation visual effect is not attractive, the wire harness is easy to loose, the peripheral parts are abraded in the using process, and the risk of short circuit of the acquisition loop is caused.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a battery pack, so as to increase the available space in the battery pack case and reduce the risk of short circuit.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

a battery pack comprising a housing, a battery module housed in the housing, and a controller fixedly attached to the housing, the battery pack further comprising:

a connection terminal disposed in a horizontal state on a cell unit constituting the battery module;

the flexible flat cable is connected between the wiring terminal and the controller so as to form signal transmission between the battery cell unit and the controller;

the flexible flat cable is provided with a transition section connected to the wiring terminal and a connecting section connected between the transition section and the controller; due to the transition section, the connection section is guided downward and attached to the side of the battery module to be held.

Furthermore, the transition section comprises a horizontal section which is led out from the wiring terminal and horizontally extends to the side face of the battery cell unit, and a vertical section which is bent by the horizontal section and extends downwards.

Furthermore, due to the horizontal section, the vertical section abuts against the side surface of the battery cell unit.

Further, the length of the vertical section is not less than 10 mm.

Further, the connection section comprises a first connection section and a second connection section, the first connection section is bent and turned from the tail end of the transition section and then is attached to and held at the side of the battery module, and the second connection section is bent and extended from the tail end of the first connection section to the other side of the battery module and is connected to the controller.

Further, the first connecting section and the second connecting section are vertically arranged on a horizontal plane.

Further, connection points are provided on the side surfaces of the battery modules, and the first connection segments are held at the sides of the battery modules by the connection of the connection points.

Further, the connection point comprises a first connection point close to the beginning of the first connection section, and a plurality of second connection points arranged at intervals along the extending direction of the first connection section.

Furthermore, the distance between the first connecting point and the initial end of the first connecting section is 5-20 mm.

Furthermore, each connecting section led out by the plurality of battery cell units arranged side by side extends towards the controller in a laminating adhesion mode.

Compared with the prior art, the utility model has the following advantages:

according to the battery pack, the battery cell unit and the controller in the battery module are connected through the flexible flat cable, particularly, the connecting section of the flexible flat cable is guided downwards through the transition section and is attached to the side part of the battery module to be kept, the cable occupies a small space in the shell, abrasion of the cable due to disorder is avoided, and short circuit risk is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model, illustrate embodiments of the utility model and together with the description serve to explain the utility model, and the description is given by way of example only and without limitation to the terms of relative positions. In the drawings:

fig. 1 is a schematic view of a part of a battery pack according to an embodiment of the present invention;

FIG. 2 is a schematic top view of the structure of FIG. 1;

fig. 3 is a schematic structural view of the flexible flat cable of fig. 1;

description of reference numerals:

1. a lower housing; 101. an accommodating cavity;

2. a battery module; 201. a cell unit;

3. a flexible flat cable; 301. a transition section; 3011. a horizontal segment; 3012. a vertical section; 302. a connecting section; 3021. a first connection section; 3022. a second connection section; 303. and (5) inserting a wire joint.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inside", "outside", etc. appear, they are based on the orientation or positional relationship shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The utility model relates to a battery pack which mainly comprises a shell, a battery module contained in the shell, a controller fixedly connected in the shell, a wiring terminal and a flexible flat cable. The connecting terminal is arranged on a battery cell unit forming the battery module in a horizontal state; a flexible flat cable is connected between the connection terminal and the controller to constitute signal transmission between the battery module and the controller; the flexible flat cable is provided with a transition section connected to the wiring terminal and a connecting section connected between the transition section and the controller; due to the transition section, the connection section is guided downward and attached to the side of the battery module to be held.

Through flexible flat cable connection battery module and controller, especially flexible flat cable's linkage segment is passed through the changeover portion and is led down and laminate extremely battery module's lateral part, the space in the cable occupation casing is less, avoids the cable because of unordered wearing and tearing that cause, reduces the short circuit risk.

Based on the above description of the overall design concept, an exemplary structure is described, as shown in fig. 1 in conjunction with fig. 2, in which the case of the battery pack has an internal hollow structure, and in order to facilitate the presentation of the innovative points of the present invention, fig. 1 shows only the structure of the lower case 1 of the case, and it should be noted that, in the state shown in fig. 1, the direction parallel to the upper surface of the battery module 2 is a horizontal direction; a direction perpendicular to the horizontal direction, which is defined as a vertical direction, that is, a thickness direction of the cell unit or the battery module 2; the circumferential outer surface of the battery module 2 is defined as a side surface of the battery module 2.

The top of the lower casing 1 is open, and a receiving cavity 101 is formed inside the lower casing 1. Two sets of battery modules 2 are housed in the housing chamber 101. In this embodiment, two sets of battery modules 2 are arranged at intervals in the upper and lower directions in the state shown in fig. 2, and each battery module 2 is composed of four battery cell units 201. Each of the cell units 201 in each of the battery modules 2 is arranged in a state shown in fig. 2, one-to-one correspondence with each other in an up-down direction, and at intervals, and the connection terminals of each of the cell units 201 are installed in the interval regions.

In this embodiment, the connection terminal is disposed on the electric core unit 201 in a horizontal state, and in the horizontal state, for each pin constituting the output of the electric core unit 301, each pin is arranged in a horizontal direction, so that when each pin is connected to the connection terminal, the flat port of the connection terminal is disposed in the horizontal state. The plug connector 303, which is fitted to the terminal, is also horizontal as a whole, as shown in fig. 3.

On the binding post of each electric core unit 201, be connected with flexible flat cable 3 with the form of grafting or crimping respectively, each flexible flat cable 3 establishes the signal transmission connection between the electric core unit 201 that corresponds separately and the controller that is located the module tip. An exemplary structure, as shown in fig. 1, the controller of each battery module 2 is provided on the side of each battery module 2 in the state shown in fig. 1 and is integrated in the BMS.

In order to reduce the space occupied by the flexible flat cable 3 in the lower housing 1 as much as possible, as shown in fig. 1 and 2 in conjunction with fig. 3, the flexible flat cable 3 has a transition section 301 connected to the connection terminal through a plug connector 303, and a connection section 302 connected between the transition section 301 and the controller; due to the arrangement of the transition section 301, the connection section 302 is guided downward and attached to the side of the battery module 2.

Through this structural arrangement, the flexible flat cables 3 for each cell unit 201 can be arranged on the side surface of each battery module to reduce the occupied space in the lower casing 1, so that the volume of each cell unit can be appropriately increased, and the capacity of the whole battery pack is improved.

To further improve the cable arrangement effect, due to the flat plane characteristic of the Flexible Flat Cable (FFC)3, in the present embodiment, the transition section 301 includes a horizontal section 3011 led out from the terminal, and a vertical section 3012 bent from the horizontal section 3011 and extending downward.

The flat plane of the horizontal section 3011 is arranged in a vertical state, so that the flat plane of the horizontal section 3011 can be attached to the upper surface of the cell unit 201 as much as possible according to the arrangement of the cell unit 201, and the occupied space of the horizontal section 3011 is reduced. In order to further improve the installation effect of the whole cable, the length of the horizontal section 3011 should ensure that the vertical section 3012 can be attached to the side surface of the battery module 2 as much as possible.

The vertical section 3012 is formed by bending the horizontal section 3011 at 90 °, and by this bending, the strength of the horizontal section and the vertical section as a whole can be enhanced. Similarly, in order to reduce the occupied space of the vertical section 3012, the flat plane of the vertical section 3012 formed after bending may be attached to the side surface of the cell unit 201 as much as possible along the vertical direction according to the arrangement of the cell unit 201. Wherein, the length of the vertical section 3012 is not less than 10 mm.

The connecting section 302 of the present embodiment is mainly composed of two parts, i.e., a first connecting section 3021 and a second connecting section 3022.

In order to further reduce the space occupied by the cable in the housing, the first connecting section 3021 is formed by bending and flipping the end of the vertical section 3012 of the flexible flat cable 3, and in this embodiment, the flat plane of the first connecting section 3021 abuts against the side surface of each cell unit 201, that is, the side surface of the battery module 2.

In order to improve the stability of the first connecting section 3021 at the side surface of the battery module 2, connection points are provided on the side surface of the battery module 2 along which the first connecting section 3021 extends, and the first connecting section 3021 is fixedly held at the side surface of the battery module 2 by adhesion at the connection points.

In order to further improve the connection stability of the first connection section 3021, in the present embodiment, the connection point mainly includes a first connection point disposed near the beginning of the first connection section 3021 and a plurality of second connection points disposed at intervals along the extending direction of the first connection section 3021. The distance between the first connecting point and the starting end of the first connecting section 3021 should be 5mm to 20mm, for example, 8mm or 15mm, to ensure the connecting effect. The distance between the second connecting points and the first connecting points and the distance between two adjacent second connecting points are ensured to be 150 mm-200 mm, for example, the distance value is set to be 160mm or 180 mm.

In addition, it should be noted that, since each cell unit 201 leads out one flexible flat cable 3, in order to further reduce the space occupied by each cable in the gap between two battery modules 2, the first connection segments 3021 of the flexible flat cables 3 led out from each cell unit 201 of the same battery module 2 may be adhered to each other in a stacked manner, and at this time, only the first connection segment 3021 located at the innermost layer needs to be adhered to the side surface of the battery module 2 through a connection point.

The second connection segment 3022 is bent from the end of the first connection segment 3021 and extends toward the other side of the battery module 2 to connect a controller. In order to make the layout of the flexible flat cable 3 more compact and more stable, the second connecting section 3022 is perpendicularly bent from the end of the first connecting section 3021 such that the flat plane of the second connecting section 3022 is fitted on the side of the battery module 2 having the BMS.

In addition, in order to secure the connection effect of the second connecting section 3022, third connection points, at which the second connecting section 3022 is bonded to the side surface of the battery module 2, are also provided at the second connecting section 3022. In order to improve the connection effect of the third connection point, the distance from the third connection point to the connection port of the controller is preferably kept between 100mm and 150mm, such as 110mm or 130 mm.

As can be seen from the above structure, each of the cell units 201 has the transition section 301 with the same structure, and with this structure, the universality of the partial structure of the flexible flat cable 3 can be ensured, and the installation efficiency can be improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A battery pack comprising a housing, a battery module (2) housed in the housing, and a controller fixedly attached in the housing, the battery pack further comprising:

a connection terminal arranged in a horizontal state on a cell unit (201) constituting the battery module (2);

a flexible flat cable (3) connected between the connection terminal (202) and the controller to constitute signal transmission between the cell unit (201) and the controller;

the flexible flat cable (3) is provided with a transition section (301) connected to the wiring terminal, and a connecting section (302) connected between the transition section (301) and the controller; due to the transition section (301), the connecting section (302) is guided downward and attached to the side of the battery module (2) to be held.

2. The battery pack according to claim 1, wherein: the transition section (301) comprises a horizontal section (3011) which is led out from the wiring terminal (202) and horizontally extends to the side face of the battery cell unit (201), and a vertical section (3012) which is bent by the horizontal section (3011) and extends downwards.

3. The battery pack according to claim 2, wherein: due to the horizontal section (3011), the vertical section (3012) is attached to the side of the cell unit (201).

4. The battery pack according to claim 2, wherein: the length of the vertical section (3012) is not less than 10 mm.

5. The battery pack according to claim 1, wherein: the connecting section (302) comprises a first connecting section (3021) and a second connecting section (3022), the first connecting section (3021) is folded and turned from the end of the transition section (301) to abut against and be held on the side of the battery module (2), and the second connecting section (3022) is folded and extended from the end of the first connecting section (3021) to the other side of the battery module (2) and is connected to the controller.

6. The battery pack according to claim 5, wherein: the first connecting section (3021) and the second connecting section (3022) are vertically arranged on a horizontal plane.

7. The battery pack according to claim 5, wherein: connection points are provided on the side surfaces of the battery module (2), and the first connection segment (3021) is held at the side of the battery module (2) due to the connection of the connection points.

8. The battery pack according to claim 7, wherein: the connection point comprises a first connection point close to the beginning of the first connection section (3021) and a plurality of second connection points arranged at intervals along the extension direction of the first connection section (3021).

9. The battery pack according to claim 8, wherein: the distance between the first connecting point and the starting end of the first connecting section (3021) is 5 mm-20 mm.

10. The battery pack according to any one of claims 1 to 9, wherein: each connecting section (302) led out by a plurality of battery cell units (201) arranged side by side extends towards the controller in a laminating adhesion mode.