Battery connecting piece, battery module and battery pack

Abstract

The utility model provides a battery connecting piece, a battery module and a battery pack, the battery connecting piece comprises a plurality of anode connecting parts used for being connected with the anode of a battery and comprising at least three rows of anode connecting parts arranged in parallel along a first direction; the plurality of negative electrode connecting parts are used for being connected with a battery negative electrode and comprise at least three rows of negative electrode connecting parts which are arranged in parallel along the first direction; a plurality of first connection sections, each of which is connected between one of the positive electrode connection portions and one of the negative electrode connection portions to form a conductive unit; and the plurality of second connecting sections are connected between two adjacent conductive units. The battery connecting piece comprises at least three rows of positive electrode connecting parts and at least three rows of negative electrode connecting parts, the positive electrode connecting parts and the negative electrode connecting parts are connected through the first connecting sections, and then the conductive units are connected through the second connecting sections, so that at least three rows of batteries can be connected in parallel through the single battery connecting piece; and therefore, the parallel connection of enough batteries can be realized.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery connector, a battery module, and a battery pack. Background Technology

[0002] A battery module is a component of a battery system, typically consisting of several cells, connectors / buses, a battery management system, and a casing. Individual cells within a battery module are connected in series or parallel via connectors, which need to be designed according to the cell arrangement. Due to limitations in the battery module's casing size and cell arrangement, when a sufficient number of cells cannot be connected in parallel in the first row, parallel connection across rows is necessary. Current connector technologies cannot support a sufficient number of cells connected in parallel. Utility Model Content

[0003] The embodiments of this utility model provide a battery connector, a battery module, and a battery pack, which can improve the technical problem that existing battery connectors cannot connect a sufficient number of batteries in parallel.

[0004] In a first aspect, embodiments of the present invention provide a battery connector, comprising:

[0005] Multiple positive electrode connection portions for connecting to the positive electrode of the battery, including at least three rows of positive electrode connection portions arranged in parallel along a first direction;

[0006] Multiple negative electrode connection portions for connecting to the negative electrode of the battery, including at least three rows of negative electrode connection portions arranged in parallel along the first direction;

[0007] Multiple first connecting segments, each of the first connecting segments being connected between a positive electrode connecting portion and a negative electrode connecting portion to form a conductive unit;

[0008] Multiple second connection segments are connected between two adjacent conductive units.

[0009] In one embodiment, each of the at least three rows of positive electrode connections includes a plurality of positive electrode connections spaced apart along a second direction, wherein the first direction and the second direction form an angle; and / or

[0010] Each of the at least three rows of negative electrode connections includes a plurality of negative electrode connections spaced apart along the second direction, wherein the first direction and the second direction are at an angle.

[0011] In one embodiment, the at least three rows of positive electrode connections and the at least three rows of negative electrode connections are arranged in parallel along the first direction.

[0012] In one embodiment, the positive electrode connection portion corresponds one-to-one with the negative electrode connection portion, the resistance of the first connection segment is less than the resistance of the second connection segment, and the resistance of the plurality of first connection segments is the same.

[0013] In one embodiment, the first connecting segment has a bend at one end near the negative electrode connecting portion.

[0014] In one embodiment, a fusible link is provided on the first connecting segment or the second connecting segment.

[0015] In one embodiment, the number of the fusible portions is the same as the number of the conductive units.

[0016] In one embodiment, the first connecting segment and / or the second connecting segment are provided with an overflow hole.

[0017] In one embodiment, the battery connector is integrally formed.

[0018] Secondly, embodiments of this utility model provide a battery module, comprising:

[0019] Multiple batteries;

[0020] In the aforementioned battery connector, the positive electrode connection portion is connected to the positive electrode of the battery, and the negative electrode connection portion is connected to the negative electrode of the battery.

[0021] In one embodiment, the plurality of batteries are arranged in an S-shaped array, and a plurality of battery connecting pieces are provided. Each battery connecting piece includes three rows of positive electrode connecting parts and three rows of negative electrode connecting parts. The three rows of positive electrode connecting parts and the three rows of negative electrode connecting parts are connected to the three adjacent rows of batteries, and the positive electrode connecting parts and the negative electrode connecting parts correspond one-to-one.

[0022] Thirdly, embodiments of this utility model provide a battery pack, including the aforementioned battery module.

[0023] The beneficial effects of the embodiments of this utility model are as follows:

[0024] In embodiments of this utility model, by including at least three rows of positive electrode connecting portions and at least three rows of negative electrode connecting portions in the battery connecting piece, and connecting the positive electrode connecting portions and the negative electrode connecting portions through a first connecting segment, and then connecting the conductive unit through a second connecting segment, a single battery connecting piece can be connected in parallel to at least three rows of batteries, thereby enabling the parallel connection of a sufficient number of batteries. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the battery connector provided in an embodiment of this utility model;

[0027] Figure 2 This is a schematic diagram of the connection between the battery connector and the battery according to an embodiment of the present invention;

[0028] Figure 3 An exploded view of the battery module provided in an embodiment of this utility model.

[0029] Reference numerals: Battery connector -1; Positive electrode connector -11; Negative electrode connector -12; First connector -13; Second connector -14; Fusible link -15; Excess adhesive hole -16; Battery -2; Positive electrode -21; Negative electrode -22; Insulating film -3. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0031] Firstly, please refer to Figure 1-2 An embodiment of this utility model provides a battery connector 1, comprising:

[0032] Multiple positive electrode connection portions 11 are used to connect to the positive electrode 21 of the battery, including at least three rows of positive electrode connection portions 11 arranged in parallel along a first direction;

[0033] Multiple negative electrode connection portions 12 are used to connect to the negative electrode 22 of the battery, including at least three rows of negative electrode connection portions 12 arranged in parallel along the first direction;

[0034] A plurality of first connecting segments 13, each of the first connecting segments 13 being connected between a positive electrode connecting portion 11 and a negative electrode connecting portion 12 to form a conductive unit;

[0035] Multiple second connecting segments 14 are connected between two adjacent conductive units.

[0036] It is understandable that the volume of the battery module housing and the arrangement of the batteries 2 will limit the number of batteries 2 in the first row. When the number of batteries 2 in the first row is small, in order to meet the output voltage requirements, multiple rows of batteries 2 need to be connected in parallel to provide a sufficient number of parallel batteries. In this application, the conductive unit can realize the series connection between batteries 2, that is, the batteries connected to the positive terminal connection 11 and the batteries connected to the negative terminal connection 12 in the conductive unit are connected in series. The second connecting section 14 can realize the parallel connection between batteries 2, that is, the batteries 2 connected to the positive terminal connection 11 of the same battery connecting piece 1 are connected in parallel, and the batteries 2 connected to the negative terminal connection 12 of the same battery connecting piece 1 are connected in parallel. At least three rows of positive electrode connection parts 11 arranged in parallel are connected to at least three rows of adjacent batteries 2 respectively. The number of rows of batteries 2, the number of rows of positive electrode connection parts 11 and negative electrode connection parts 12 are the same, and the positive electrode 21 of some batteries 2 is electrically connected to the positive electrode connection part 11, while the negative electrode 22 of other batteries 2 is electrically connected to the negative electrode connection part 12. The negative electrode connection part 12 and the positive electrode connection part 11 are then electrically connected through a first connecting segment 13. A positive electrode connection part 11, a negative electrode connection part 12 and the first connecting segment 13 between them form a conductive unit. The conductive unit is then connected through a second connecting segment 14, thereby realizing the parallel and series connection of at least three rows of batteries 2.

[0037] It can be understood that the positive electrode connection portion 11 is the area on the connecting piece used for electrical connection with the positive electrode 21 of the battery. The negative electrode connection portion 12 is the area on the connecting piece used for electrical connection with the negative electrode 22 of the battery. The positive electrode connection portion 11, the negative electrode connection portion 12, the first connecting segment 13, and the second connecting segment 14 are all made of conductive material. The shape of the battery connecting piece 1 can be designed and manufactured according to the arrangement of the batteries 2. The first direction is the parallel direction of the multiple rows of batteries 2.

[0038] In one embodiment, the positive electrode 21 and the negative electrode 22 of the battery 2 are located on the same side of the axial direction of the battery 2.

[0039] It is understood that the positive electrode 21 of battery 2 can be a cylindrical protrusion located in the middle, with the negative electrode 22 of battery 2 surrounding the protrusion. Correspondingly, the positive electrode connection portion 11 can be configured as a circle matching the positive electrode 21 of battery to increase the connection area with the positive electrode 21 of battery and improve the reliability of battery connection piece 1. The negative electrode connection portion 12 can be configured as having an arc-shaped notch matching the negative electrode 22 of battery 2 to increase the connection area with the negative electrode 22 of battery and improve the reliability of battery connection piece 1.

[0040] In one embodiment, the positive electrode 21 and the negative electrode 22 of the battery 2 are located on opposite sides of the axial direction of the battery 2.

[0041] It is understandable that when the positive electrode 21 and the negative electrode 22 of battery 2 are located on both sides of the axial direction of battery 2, battery 2 can be arranged in an alternating positive and negative manner to match with battery connector 1.

[0042] In one embodiment, the plurality of positive electrode connection portions 11 include three rows of positive electrode connection portions 11 arranged in parallel along a first direction;

[0043] Multiple negative electrode connection portions 12, including three rows of negative electrode connection portions 12 arranged in parallel along the first direction.

[0044] It is understandable that the more rows of battery connector 1 there are, the more complex its structure becomes. The three rows of positive electrode connector 11 and the three rows of negative electrode connector 12 have relatively simple structures and can effectively meet production needs.

[0045] In one embodiment, each of the at least three rows of positive electrode connection portions 11 includes a plurality of positive electrode connection portions 11 spaced apart along a second direction, wherein the first direction and the second direction are at an angle.

[0046] It is understood that each row of positive electrode connection portions 11 includes a plurality of positive electrode connection portions 11 spaced apart along the second direction. Correspondingly, a plurality of batteries 2 are arranged side by side along the second direction. The plurality of positive electrode connection portions 11 in each row of positive electrode connection portions 11 are electrically connected to the positive electrodes 21 of the plurality of batteries 2 arranged side by side along the second direction, and correspond one-to-one, thereby connecting the positive electrodes 21 of the plurality of batteries 2 arranged side by side along the second direction together. The second direction is the extending direction of each row of batteries 2.

[0047] In one embodiment, each of the at least three rows of negative electrode connection portions 12 includes a plurality of negative electrode connection portions 12 spaced apart along the second direction, wherein the first direction and the second direction are at an angle.

[0048] It is understood that each row of negative electrode connection portions 12 includes a plurality of negative electrode connection portions 12 spaced apart along the second direction. Correspondingly, a plurality of batteries 2 are arranged side by side along the second direction. The plurality of negative electrode connection portions 12 of each row of negative electrode connection portions 12 are electrically connected to the negative electrodes 22 of the plurality of batteries 2 arranged side by side along the second direction, and correspond one-to-one, thereby connecting the negative electrodes 22 of the plurality of batteries 2 arranged side by side along the second direction together.

[0049] In one embodiment, the first direction is perpendicular to the second direction.

[0050] It is understandable that the battery 2 can be arranged in a square array or an S-shaped array. The first direction and the second direction are the row direction and column direction of the battery 2 arrangement, respectively. The row direction and column direction are set perpendicularly, which can make the battery 2 arrangement more neat.

[0051] In one embodiment, the at least three rows of positive electrode connection portions 11 and the at least three rows of negative electrode connection portions 12 are arranged in parallel along the first direction.

[0052] It is understood that by arranging the positive electrode connection 11 and the negative electrode connection 12 in parallel along the first direction, that is, arranging the positive electrode connection 11 and the negative electrode connection 12 in opposite directions on the battery connecting piece 1, it is convenient to arrange multiple battery connecting pieces 1 in sequence, thereby connecting multiple batteries 2 arranged in parallel along the first direction in series through multiple battery connecting pieces 1.

[0053] In one embodiment, the positive electrode connection portion 11 corresponds one-to-one with the negative electrode connection portion 12, the resistance of the first connection segment 13 is less than the resistance of the second connection segment 14, and the resistance of the plurality of first connection segments 13 is the same.

[0054] It is understandable that batteries 2 are often arranged in an S-shaped or square array, meaning that the number of batteries 2 in each row and column is the same. By matching the positive terminal connection 11 with the negative terminal connection 12 one-to-one, the array-arranged batteries 2 can be effectively matched, ensuring that each battery 2 is connected by the battery connecting piece 1, avoiding any missed connections, and facilitating connection. The resistance of the first connecting segment 13 is less than the resistance of the second connecting segment 14, which allows the positive terminal connection 11 and the negative terminal connection 12 connected by the first connecting segment 13 to be effectively connected, thereby realizing series connection between different batteries 2. The resistance of multiple first connecting segments 13 is the same, which ensures that the current between multiple conductive units is the same, and thus the current magnitude of each battery connecting piece 1 is the same.

[0055] It is understandable that, according to the resistance formula: ρ=R·S / L, where R represents resistance, L represents the length of the resistor, and S represents the cross-sectional area of ​​the resistor, the resistance of the first connecting segment 13 and the resistance of the second connecting segment 14 can be adjusted during the design stage by adjusting the length and cross-sectional area of ​​the first connecting segment 13 and the second connecting segment 14, so that the resistance of the two meets the magnitude relationship mentioned above.

[0056] In one embodiment, the first connecting segment 13 has a bend at one end near the negative electrode connecting portion 12.

[0057] It can be understood that the positive electrode 21 of battery 2 can be a cylindrical protrusion located in the middle, with the negative electrode 22 of battery 2 surrounding the protrusion. By providing a bent portion at one end of the first connecting section 13 near the negative electrode connecting portion 12, the negative electrode connecting portion 12 can extend downward relative to the connecting piece, thereby facilitating electrical connection with the negative electrode 22 of the battery. The bent portion can be integrally formed with the battery connecting piece 1. The bending height and shape of the bent portion can be set as needed. The extending direction of the negative electrode connecting portion 12 can be parallel to the extending direction of the negative electrode 22 of the battery, thereby increasing the connection area between the negative electrode connecting portion 12 and the negative electrode 22 of the battery and improving the reliability of the battery connecting piece 1.

[0058] In one embodiment, a fusible portion 15 is provided on the first connecting segment 13 or the second connecting segment 14.

[0059] It is understandable that the fuse 15 can be a thermally broken fuse, formed by opening a hole in the battery connector 1, which facilitates processing. The fuse 15 can melt when the current exceeds a set value, thereby improving the safety of the battery 2. The melting setting value of the fuse 15 can be set as needed.

[0060] In one embodiment, the number of the fuse portions 15 is the same as the number of the conductive units.

[0061] It is understandable that each conductive unit is equipped with a fuse 15, which can better improve the safety of battery 2.

[0062] In one embodiment, an overflow hole 16 is provided on the first connecting segment 13, the second connecting segment 14, or both the first connecting segment 13 and the second connecting segment 14.

[0063] It is understandable that when battery 2 is assembled into a battery module, it will be surrounded by expanding foam. By providing overflow holes 16 on the battery connector 1, the expanding foam can be easily filled, and the expanding foam can be prevented from impacting the battery connector 1. The size, number, and shape of the overflow holes 16 can be set as needed.

[0064] In one embodiment, the battery connector 1 is integrally formed.

[0065] It is understandable that the battery connector 1 can be integrally molded, which is simple and suitable for mass production.

[0066] Secondly, please refer to Figures 1-3 An embodiment of this utility model provides a battery module, comprising:

[0067] Multiple batteries 2;

[0068] In the aforementioned battery connector 1, the positive electrode connection part 11 is connected to the positive electrode 21 of the battery 2, and the negative electrode connection part 12 is connected to the negative electrode 22 of the battery 2.

[0069] It is understood that the battery connector 1 is used to connect at least three rows of batteries 2. When the number of rows of batteries 2 exceeds the number of rows that the battery connector 1 can connect, multiple battery connectors 1 can be used to connect them, thereby realizing the sequential connection of multiple rows of batteries 2 in series and parallel.

[0070] In one embodiment, the battery module further includes an insulating film 3, which is disposed between the battery connector 2 and the battery 1. The insulating film 3 is provided with a positive electrode connection through hole and a negative electrode connection through hole, which are disposed opposite to the positive electrode connection 11 and the negative electrode connection 12.

[0071] It is understood that the insulating film 3 is used to separate the battery connector 1 from the battery to prevent short circuits caused by the positive and negative terminals of the same battery overlapping with the same battery connector 1. To facilitate the electrical connection of the positive terminal connection 11 and the negative terminal connection 12 to the positive terminal 21 and the negative terminal 22 of the battery 2, respectively, through holes for the positive and negative terminals are provided on the insulating film 3. These through holes allow the positive terminal connection 11 and the negative terminal connection 12 to be electrically connected to the positive terminal 21 and the negative terminal 22 of the battery 2, respectively. The positive and negative terminal through holes can be provided individually or as a single through hole, and can be adjusted as needed.

[0072] In one embodiment, the plurality of batteries 2 are arranged in an S-shaped array, and a plurality of battery connecting pieces 1 are provided. Each battery connecting piece 1 includes three rows of positive electrode connecting parts 11 and three rows of negative electrode connecting parts 12. The three rows of positive electrode connecting parts 11 and the three rows of negative electrode connecting parts 12 are connected to the three adjacent rows of batteries 2, and the positive electrode connecting parts 11 and the negative electrode connecting parts 12 correspond one-to-one.

[0073] It can be understood that each battery connector 1 includes three rows of positive electrode connectors 11 and three rows of negative electrode connectors 12, meaning that each battery connector 1 can be connected to three rows of S-shaped batteries 2. The number of S-shaped batteries 2 in each row can be set as needed.

[0074] Thirdly, embodiments of this utility model provide a battery pack, including the aforementioned battery module.

[0075] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery connector, characterized in that, include: Multiple positive electrode connection portions for connecting to the positive electrode of the battery, including at least three rows of positive electrode connection portions arranged in parallel along a first direction; Multiple negative electrode connection portions for connecting to the negative electrode of the battery, including at least three rows of negative electrode connection portions arranged in parallel along the first direction; Multiple first connecting segments, each of the first connecting segments being connected between a positive electrode connecting portion and a negative electrode connecting portion to form a conductive unit; Multiple second connection segments are connected between two adjacent conductive units.

2. The battery connector according to claim 1, characterized in that, Each of the at least three rows of positive electrode connections includes a plurality of positive electrode connections spaced apart along a second direction, wherein the first direction and the second direction form an angle; and / or Each of the at least three rows of negative electrode connections includes a plurality of negative electrode connections spaced apart along the second direction, wherein the first direction and the second direction are at an angle.

3. The battery connector according to claim 1, characterized in that, The at least three rows of positive electrode connections and the at least three rows of negative electrode connections are arranged in parallel along the first direction.

4. The battery connector according to claim 1, characterized in that, The positive electrode connection portion corresponds one-to-one with the negative electrode connection portion, the resistance of the first connection segment is less than the resistance of the second connection segment, and the resistance of the plurality of first connection segments is the same.

5. The battery connector according to claim 1, characterized in that, The first connecting segment has a bend at one end near the negative electrode connecting part.

6. The battery connector according to claim 1, characterized in that, A fusible link is provided on the first connecting segment or the second connecting segment.

7. The battery connector according to claim 6, characterized in that, The number of the fused portions is the same as the number of the conductive units.

8. The battery connector according to claim 1, characterized in that, The first connecting segment and / or the second connecting segment are provided with overflow holes.

9. The battery connector according to claim 1, characterized in that, The battery connector is integrally formed.

10. A battery module, characterized in that, include: Multiple batteries; The battery connector as described in any one of claims 1-9, wherein the positive electrode connection portion is connected to the positive electrode of the battery, and the negative electrode connection portion is connected to the negative electrode of the battery.

11. The battery module according to claim 10, characterized in that, The multiple batteries are arranged in an S-shaped array. Multiple battery connecting pieces are provided. Each battery connecting piece includes three rows of positive electrode connecting parts and three rows of negative electrode connecting parts. The three rows of positive electrode connecting parts and the three rows of negative electrode connecting parts are connected to the three adjacent rows of batteries. The positive electrode connecting parts and the negative electrode connecting parts correspond one-to-one.

12. A battery pack, characterized in that, Includes the battery module as described in claim 10 or 11.

Images