CN221126184U

CN221126184U - Strip-shaped battery pack

Info

Publication number: CN221126184U
Application number: CN202322713503.0U
Authority: CN
Inventors: 罗丕伟
Original assignee: Hunan Granbo Technology Co ltd
Current assignee: Hunan Granbo Technology Co ltd
Priority date: 2023-10-10
Filing date: 2023-10-10
Publication date: 2024-06-11
Anticipated expiration: 2033-10-10

Abstract

The application discloses a strip battery pack which comprises at least one battery cell group, an electrode connecting piece and an electrode output conversion piece, wherein the battery cell group is sequentially connected, the electrode connecting piece is respectively connected with the battery cell group and the electrode output conversion piece, and the battery cell group comprises at least one battery cell; all the battery monomers are sequentially connected and arranged into a strip-shaped structure, the electrode connecting pieces comprise a first connecting piece and a second connecting piece, the first connecting piece and the second connecting piece are arranged on the side face of the strip-shaped structure, the electrode output conversion piece is located in a cavity of the support and arranged at the end part of the strip-shaped structure, and the components of the battery pack are compactly arranged around the strip-shaped structure, so that the battery pack has smaller external dimensions, the battery pack has higher energy density in the same unit volume, and the whole product structure is simple and reliable.

Description

Strip-shaped battery pack

Technical Field

The application belongs to the field of new energy batteries, and particularly relates to a strip-shaped battery pack.

Background

In the background of the global energy structure transition to cleanliness and low carbonization, lithium batteries are increasingly in demand in daily life and production industry as a means of energy storage and supply with good environmental impact. According to the requirements of application scenes, the requirements on working current, power value, volume capacity coefficient of the battery and the like are correspondingly improved, the requirements on a multi-parallel-serial design scheme of a corresponding PACK battery are increased, and when the PACK is designed in multi-parallel-serial-parallel arrangement of the lithium battery, the problem that the energy density which can be provided in unit volume is relatively low due to the large space occupied by a battery PACK can occur according to a conventional scheme.

Disclosure of utility model

Therefore, an object of the present application is to provide a strip-shaped battery pack, in which the battery cells are arranged in a strip-shaped structure, and other components of the battery pack are compactly arranged around the strip-shaped structure, so that the battery pack has a smaller external dimension, the battery pack has a higher energy density in the same unit volume, and the whole product has a simple and reliable structure.

The application discloses a strip battery pack, which comprises at least one cell group, an electrode connecting piece and an electrode output conversion piece, wherein the cell group comprises a plurality of cells;

The battery cell groups are sequentially connected to form a strip shape;

the electrode connecting piece is respectively connected with the battery cell group and the electrode output conversion piece.

Further, the battery cell group comprises at least one battery cell, an output positive electrode and an input negative electrode; the battery cells are sequentially connected to form a strip shape.

Further, the electrode connection member includes a first connection member and a second connection member;

The first connecting piece comprises a first output end and positive electrode connecting ends which are connected with the output positive electrodes in one-to-one correspondence;

The second connecting piece comprises a second output end and negative electrode connecting ends which are connected with the input negative electrodes in a one-to-one correspondence manner;

the first output end is arranged at the end part of the first connecting piece far away from the positive electrode connecting end;

the second output end is arranged at the end part of the second connecting piece far away from the negative electrode connecting end.

Further, the electrode output conversion piece comprises a front plate, a rear plate and a pin header;

The row pins are arranged between the front plate and the rear plate and are respectively connected with the front plate and the rear plate;

The rear plate is connected with the first output end and the second output end respectively.

Further, the insulation sheet group comprises a plurality of first insulation sheets, a plurality of second insulation sheets and a plurality of third insulation sheets;

the first insulating sheets are arranged at the front and rear ends of all the battery cell groups and are configured to isolate all the battery cell groups;

The second insulating sheet is arranged between the output positive electrode and the input negative electrode of the two adjacent cell groups and is configured to isolate the two adjacent cell groups;

The third insulating sheet is arranged on the front side surface of the front plate in the electrode output conversion piece.

Further, the battery pack also comprises a plurality of hollow spacers, wherein the hollow spacers are arranged between two adjacent battery monomers.

Further, the electrode output conversion part also comprises a support, a cavity is formed in the support, and the electrode output conversion part is located in the cavity of the support.

Further, the battery pack also comprises an output plug wire, one end of the output plug wire is connected with the electrode output conversion piece, and the other end of the output plug wire is connected with an external connecting piece and used for outputting electric energy of the strip-shaped battery pack.

Further, the battery pack also comprises an outer coating film which completely covers the outer side face of the strip-shaped battery pack.

The application has the following beneficial effects:

Drawings

Figure 1 is a schematic view of a strip battery pack of the present application,

Figure 2 is a schematic view of a strip battery pack of multiple cell groups provided in some embodiments of the present application,

Figure 3 is a schematic view of a strip battery pack of a plurality of single cell groups provided in some embodiments of the present application,

Figure 4 is a schematic view of a strip battery pack of multiple cell groups of multiple cells provided in some embodiments of the present application,

Figure 5 is a schematic perspective exploded view of an embodiment of the present application,

Figure 6 is an enlarged view of a portion of an embodiment of the present application,

Fig. 7 is a partial enlarged view of an embodiment of the present application.

Reference numerals illustrate:

1. The battery cell group, the electrode connecting piece, the electrode output conversion piece, the output plug wire, the insulating sheet group, the hollow spacer, the bracket, the outer coating film, the battery cell, the electrode output positive electrode, the electrode output conversion piece, the output plug wire, the insulating sheet group, the hollow spacer, the bracket, the outer coating film, the battery cell, the electrode output positive electrode, the electrode output negative electrode, 111, positive electrode, 112, negative electrode, 21, first connector, 22, second connector, 211, first output end, 212, positive electrode connector, 221, second output end, 222, negative electrode connector, 31, front plate, 32, rear plate, 33, pin header.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. Furthermore, it should be noted that, in the description of the present utility model, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "mounted" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances. The terms "front," "rear," "upper," "lower," "inner," "outer," and the like as used herein refer to directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model. Furthermore, 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.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, a strip battery pack of the present application includes a plurality of battery cell groups 1, electrode connection members 2 and electrode output conversion members 3, the electrode connection members 2 are respectively connected with the battery cell groups 1 and the electrode output conversion members 3, and the battery cell groups 1 are sequentially connected. The battery cell group 1 comprises at least one battery cell 11, an output positive electrode 12 and an input negative electrode 13; the electrode connection member 2 includes a first connection member 21 and a second connection member 22, and the battery cell 11 includes a positive electrode 111 and a negative electrode 112.

As shown in fig. 2, in some embodiments provided by the strip-shaped battery pack disclosed by the application, the strip-shaped battery pack comprises a plurality of battery cell groups 1, each battery cell group 1 comprises a battery cell 11, and the plurality of battery cell groups 1 are sequentially connected in parallel to form the strip-shaped battery pack. The positive electrode 111 of the battery cell 11 is the output positive electrode 12 of the battery cell group 1, the negative electrode 112 of the battery cell 11 is the input negative electrode 13 of the battery cell group 1, and the first connecting piece 21 comprises a first output end 211 and a plurality of positive electrode connecting ends 212 which are connected with the output positive electrodes 12 of the battery cell group 1 in a one-to-one correspondence manner; the second connecting piece 22 includes a second output end 221 and a plurality of negative electrode connecting ends 222 connected with the input negative electrodes 13 of the battery cell group 1 in a one-to-one correspondence. Specifically, the strip-shaped battery packs shown in A1, A2, B1, B2, C1 and D1 in fig. 2 include different numbers of battery cell packs 1, wherein A1 and A2 include two battery cell packs, B1 and B2 include three battery cell packs, C1 includes four battery cell packs, and D1 includes five battery cell packs; each cell group 1 is composed of one battery cell 11, the positive electrode 111 of the battery cell 11 is the output positive electrode 12 of each cell group 1, and the negative electrode 112 of the battery cell 11 is the input negative electrode 13 of each cell group 1. The arrangement and connection modes of the battery cell group 1 are two: firstly, the battery cell groups 1 are connected in the same pole, as shown in A1, B1, C1 and D1 in FIG. 2, the battery cell groups 1 are connected in an arrangement and connection mode that an output positive electrode 12 is connected with the output positive electrode 12, and an input negative electrode 13 is connected with the input negative electrode 13; secondly, the opposite poles of the battery cell group 1 are connected, as shown in A2 and B2 in FIG. 2, the battery cell group 1 adopts an arrangement connection mode that the opposite poles of the output positive pole 12 and the input negative pole 13 are connected; when the battery cell group 1 is connected in the parallel manner, the strip-shaped battery pack can output electric energy by a current which is multiple times that of the single battery cell 11 and a voltage which is single times that of the single battery cell 11.

As shown in fig. 3, in some embodiments provided by the strip-shaped battery pack disclosed by the application, the strip-shaped battery pack comprises one cell pack 1, the cell pack 1 comprises a plurality of battery cells 11, and the positive and negative poles of the plurality of battery cells 11 are sequentially connected to form the cell pack 1 with a strip-shaped structure in a serial connection manner. The battery cell group shown in fig. 3E is composed of two battery cells 11, and the battery cell group 1 shown in F is composed of three battery cells 11; the anodes of the battery cells 11 are sequentially connected with the cathodes of the adjacent battery cells 11 to form a current path, and all the battery cells 11 are connected in series; the positive electrode 111 of the battery cell 11 at the rightmost end is the output positive electrode 12 of the battery cell group 1, and the negative electrode 112 of the battery cell 11 at the leftmost end is the input negative electrode 13 of the battery cell group 1; the first connecting piece 21 includes a first output end 211 and a positive electrode connecting end 212, the positive electrode connecting end 212 is correspondingly connected with the output positive electrode 12 of the battery cell group 1, the second connecting piece 22 includes a second output end 221 and a negative electrode connecting end 222, and the negative electrode connecting end 222 is correspondingly connected with the input negative electrode 13 of the battery cell group 1. When the battery cells 11 are connected in series, the strip-shaped battery pack can output electric energy at a current that is a single time of the battery cells and a voltage that is several times of the battery cells.

As shown in fig. 4, in other embodiments of the strip-shaped battery pack disclosed by the application, the strip-shaped battery pack comprises a plurality of battery cells 1, the battery cells 1 comprise a plurality of battery cells 11, the positive and negative poles of the plurality of battery cells 11 are sequentially connected to form the battery cells 1 of the strip-shaped structure in a serial manner, and the plurality of battery cells 1 are sequentially connected to form the strip-shaped battery pack in a parallel manner. The positive electrode 111 of the battery cell 11 at the rightmost end in each battery cell group 1 is the output positive electrode 12 of the battery cell group 1, and the negative electrode 112 of the battery cell 11 at the leftmost end is the input negative electrode 13 of the battery cell group 1; the first connecting piece 21 comprises a first output end 211 and positive electrode connecting ends 212 which are connected with the output positive electrodes 12 of the plurality of battery cell groups 1 in a one-to-one correspondence manner; the second connection member 22 includes a second output end 221 and a negative electrode connection end 222 connected to the input negative electrodes 13 of the plurality of cell groups 1 in a one-to-one correspondence. At this time, the strip-shaped battery pack can perform electric power output at twice the current and voltage of the single battery cell 11.

As shown in A1 of fig. 2, in some embodiments provided by the strip battery pack of the present disclosure, the electrode output converter 3 in the strip battery pack includes a front plate 31, a rear plate 32, and a pin header 33; the pin header 33 is disposed between the front plate 31 and the rear plate 32 and configured to conduct current on the rear plate 32 to the front plate 31; the rear plate 32 is connected to the first output terminal 211 and the second output terminal 221, respectively.

As shown in fig. 2-4, in some embodiments provided by the strip battery pack disclosed by the application, the strip battery pack further includes a plurality of hollow spacers 6, the hollow spacers 6 are made of elastic insulating materials, and the hollow spacers 6 are arranged between the battery cells 11, so that a certain elastic space is reserved between the battery cells 11 to reduce damage to the battery cells 11 caused by external extrusion.

As shown in fig. 2 and 4, in some embodiments provided by the strip battery pack of the present disclosure, the strip battery pack further includes an insulation sheet set 5, and the insulation sheet set 5 includes a plurality of first insulation sheets 51, a plurality of second insulation sheets 52, and a third insulation sheet 53; the first insulating sheets 51 are disposed at the front and rear ends of all the cell groups 1 and configured to isolate all the cell groups 1; the second insulating sheet 52 is disposed between the output positive electrode 12 and the input negative electrode 13 of the adjacent two cell groups 1 and configured to isolate the adjacent two cell groups 1; the third insulating sheet 53 is provided on the front side surface of the front plate 31 in the electrode output switching member 3.

In the above embodiment, the electrode connection member 2 is made of a conductive material, and may be made of a metal material or an alloy material, the first connection member 21 of the electrode connection member 2 is configured to conduct the current output from the battery cell positive electrode 111, and the second connection member 22 of the electrode connection member 2 is configured to conduct the current input to the negative electrode 112; the electrode output conversion member 3 is connected between the first connecting member 21 and the second connecting member 22, the electrode output conversion member 3 conducts the first connecting member 21 and the second connecting member 22, the electrode output conversion member 3 is made of conductive material, and a metal member or an alloy member can be selected to conduct the current flowing out from the output positive electrode 12 of the battery cell group 1 to the input negative electrode 13.

The present application will be described with reference to fig. 5 to 7, in which fig. 5 is an exploded view of the present application, and fig. 6 to 7 are enlarged partial views of the present application.

As shown in fig. 5, in the present embodiment, the strip-shaped battery pack includes two cell groups 1, an electrode connecting member 2, an electrode output converting member 3, an output plug wire 4, an insulating sheet group 5, a hollow spacer 6, a bracket 7, and an outer envelope 8; the battery cell group 1 is composed of a battery cell 11, the bracket 7 is made of insulating materials such as plastic, a cavity is arranged in the bracket 7, and the electrode output conversion part 3 is positioned in the cavity of the bracket 7; one end of the output plug wire 4 is connected with the electrode output conversion piece 3; the electrode output conversion piece 3, the bracket 7 and the battery cell group 1 are sequentially connected from left to right; the electrode connecting piece 2 is made of metal or alloy materials which can conduct electricity, have high ductility and are easy to process, such as any one of a metal nickel strap, a metal copper strap or a nickel iron alloy strap. In this embodiment, the first connecting piece 21 is a positive nickel strap, the positive connecting end 212 of the positive nickel strap is directly connected with the positive electrodes 111 of the two battery cells 11, and the first output end 211 of the positive nickel strap of the first connecting piece 21 is connected with the electrode output conversion piece 3; the second connecting piece 22 is a negative nickel strap, a negative connecting end 222 of the negative nickel strap is directly connected with the negative electrode 112 of the battery cell 11, and a second output end 221 on the negative nickel strap of the second connecting piece 22 is connected with the electrode output conversion piece 3;

As shown in fig. 6, the electrode output switching member 3 includes a front plate 31, a rear plate 32, and a pin header 33; the front plate 31, the rear plate 32 and the row pins 33 are made of conductive materials; the pin header 33 is disposed between the front plate 31 and the rear plate 32 and is configured to conduct the current supplied from the rear plate 32 to the front plate 31; the electrode output conversion part 3 adopts a double-layer protection plate arrangement mode, a small space is skillfully utilized to realize a high-current circuit design, and the first output end 211 and the second output end 221 are respectively connected with the rear plate 32 of the electrode output conversion part 3 in a welding mode; one end of the output plug wire 4 is connected to the front plate 31 of the electrode output conversion member 3 by welding;

As shown in fig. 7, a cavity is formed in the bracket 7, and the electrode output conversion member 3 is positioned in the cavity of the bracket 7; the electrode output conversion member 3 is completely disposed in the cavity of the bracket 7, so that the connection point between the first output end 211 and the rear plate 32, the connection point between the second output end 221 and the rear plate 32, and the connection point between the output plug wire 4 and the front plate 31 are completely surrounded by the bracket 7, and in the use process of the strip-shaped battery pack, the situation that external force touches the three connection points to cause battery disconnection is avoided.

In this embodiment, the strip-shaped battery pack includes two battery cell packs 1, and the battery cell pack 1 includes one battery cell 11; all the battery monomers 11 are sequentially connected and arranged into a strip-shaped structure, the electrode output conversion part 3 is positioned in the cavity of the bracket 7, the electrode output conversion part 3 is arranged at the end part of the strip-shaped structure, the first connecting part 21 and the second connecting part 22 are arranged on the side surface of the strip-shaped structure, and the components of the battery pack are compactly arranged around the strip-shaped structure, so that the battery pack has smaller overall dimension, the battery pack has higher energy density in the same unit volume, the whole product structure is simple and reliable, the internal structure of the battery and the design of an integrated circuit are greatly simplified, the overall dimension of the battery pack is effectively reduced, and the requirement of large-current charge and discharge of a client terminal product in a limited space dimension is met.

The specific processing process of the electrode connecting piece 2 is as follows: firstly, determining whether the battery cells 11 are connected in a parallel connection, serial connection or serial-parallel connection mode according to the output voltage or current of the battery cell group 1, and preprocessing an electrode connecting piece 2 according to the arrangement mode of homopolar connection or heteropolar connection adopted by the battery cells 11; the positive electrode connection end 212 is provided at a proper position of the positive electrode nickel strap of the first connection member 21 and the negative electrode connection end 222 is provided at a proper position of the negative electrode nickel strap of the second connection member 22 according to the arrangement adopted by the cell group 1 according to the required length.

The specific assembly mode of the embodiment is as follows: the positive poles 111 of the two battery cells 11 are opposite, two hollow spacers 6 are placed between the positive poles, the positive pole nickel strap is in spot welding connection with the positive poles 111 of the battery cells 11 through positive pole connecting ends 212, the negative pole nickel strap is in spot welding connection with the negative poles 112 of the battery cells 11 through negative pole connecting ends 222, the two battery cells 11 are sequentially connected and assembled together, insulating sheets 51 are placed at the front end and the rear end of the assembled two battery cells 11 and are firmly adhered, an output plug wire 4 is prefabricated and welded on a front plate 31 of an electrode output conversion piece 3, the electrode output conversion piece 3 is placed in a cavity of a bracket 7, a first output end 211 of the positive pole nickel strap and a second output end 221 of the negative pole nickel strap are respectively prefabricated and welded to the positive pole and the negative pole of a rear plate 32, then an insulating plate 53 is placed on the upper side of the electrode output conversion piece 3, the connection point of the output plug wire 4 and the electrode output conversion piece 3 is subjected to insulation protection, after the assembly of the components is finished, and finally the outer side surface of a strip-shaped battery pack is completely covered by an outer envelope 8, so that a finished product of the strip-shaped battery pack is obtained.

The above describes a strip-shaped battery pack provided by the utility model in detail. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the core concepts of the utility model. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. The strip-shaped battery pack is characterized by comprising at least one cell pack (1), an electrode connecting piece (2) and an electrode output conversion piece (3);

The battery cell groups (1) are sequentially connected to form a strip shape;

The electrode connecting piece (2) is respectively connected with the battery cell group (1) and the electrode output conversion piece (3).

2. The strip battery according to claim 1, wherein said cell group (1) comprises at least one cell (11), one output positive electrode (12) and one input negative electrode (13); the battery cells (11) are sequentially connected to form a strip shape.

3. The strip battery according to claim 2, wherein the electrode connection (2) comprises a first connection (21) and a second connection (22);

the first connecting piece (21) comprises first output ends (211) and positive electrode connecting ends (212) which are connected with the output positive electrodes (12) in a one-to-one correspondence manner;

The second connecting piece (22) comprises a second output end (221) and negative electrode connecting ends (222) which are connected with the input negative electrodes (13) in a one-to-one correspondence manner;

The first output end (211) is arranged at the end part of the first connecting piece (21) far away from the positive electrode connecting end (212);

The second output end (221) is arranged at the end of the second connecting piece (22) far away from the negative electrode connecting end (222).

4. A strip battery according to claim 3, wherein the electrode output switching member (3) comprises a front plate (31), a rear plate (32) and a pin header (33);

The pin header (33) is arranged between the front plate (31) and the rear plate (32) and is respectively connected with the front plate (31) and the rear plate (32);

The rear plate (32) is connected to the first output (211) and the second output (221), respectively.

5. The strip battery according to claim 4, further comprising an insulating sheet set (5), the insulating sheet set (5) comprising a number of first insulating sheets (51), a number of second insulating sheets (52) and a third insulating sheet (53);

The first insulating sheets (51) are arranged at the front end and the rear end of all the battery cell groups (1) and are configured to isolate all the battery cell groups (1);

The second insulating sheet (52) is arranged between the output positive electrode (12) and the input negative electrode (13) of the two adjacent cell groups (1) and is configured to isolate the two adjacent cell groups (1);

The third insulating sheet (53) is provided on the front side surface of the front plate (31) in the electrode output conversion member (3).

6. A strip battery according to any one of claims 2-5, further comprising a number of hollow spacers (6), said hollow spacers (6) being arranged between two adjacent cells (11).

7. The strip battery pack according to claim 1, further comprising a bracket (7), wherein a cavity is provided inside the bracket (7), and the electrode output conversion member (3) is located in the cavity of the bracket (7).

8. The strip battery pack according to claim 1, further comprising an output plug wire (4), one end of the output plug wire (4) being connected to the electrode output conversion member (3), the other end of the output plug wire (4) being connected to an external connection member for outputting electric power of the strip battery pack.

9. The strip battery according to claim 1, further comprising an outer envelope (8), said outer envelope (8) completely covering the outer side of said strip battery.