CN214153124U

CN214153124U - Battery module

Info

Publication number: CN214153124U
Application number: CN202120088456.3U
Authority: CN
Inventors: 李桂泽; 阮洁萍
Original assignee: Guangzhou Great Power Energy & Technology Co ltd
Current assignee: Guangzhou Great Power Energy & Technology Co ltd
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-09-07
Anticipated expiration: 2031-01-13

Abstract

The utility model discloses a battery module relates to battery technical field. This battery module includes battery pack and connecting piece, battery pack includes a plurality of batteries, be equipped with electric connection portion on the connecting piece, be equipped with positive pole portion and negative pole portion on the battery, it is a plurality of between the positive pole portion and the negative pole portion of battery, between positive pole portion and the positive pole portion, or pass through between negative pole portion and the negative pole portion electric connection portion. The utility model discloses a series-parallel connection that can realize a plurality of batteries when the connecting piece is connected a plurality of batteries, simple structure not only, the installation effectiveness is high, and connects the reliability height, and the security is good, need not to use large-scale laser spot welding equipment simultaneously, low in production cost. On the other hand, the nut is in threaded connection with the threaded column, so that the connection between the connecting piece and the positive electrode part and the negative electrode part of the battery is more reliable, and the reliability of the battery module is further improved.

Description

Battery module

Technical Field

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

Background

The lithium ion battery is widely applied to the fields of new energy automobiles, national power grids and the like due to the characteristics of high structural reliability, long battery core cycle life, light weight, high energy density, relatively convenient capacity expansion and the like. Because the energy provided by a single battery is limited, to meet the electrical energy requirements of new energy automobiles, national power grids and the like, a plurality of single batteries are generally connected in series and/or in parallel to form a group. The series-parallel combination of the existing batteries is generally realized by high-power laser spot welding equipment, and the defects of complex assembly steps, high mechanical cost, low production efficiency and the like exist. In addition, the existing spot welding of large laser spot welding equipment is easy to cause insufficient soldering, missing soldering and the like in the series-parallel connection process of the batteries, so that potential safety hazards exist, the maintenance of a module is difficult after spot welding, and the batteries are easy to scrap.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the not enough among the above-mentioned prior art, provide a battery module to solve the battery module equipment step that exists among the prior art complicated, with high costs, inefficiency and security subalternation problem.

For the purpose of the above, the utility model provides a battery module, this module include battery pack and connecting piece, battery pack includes a plurality of batteries, be equipped with electric connecting portion on the connecting piece, be equipped with positive pole portion and negative pole portion on the battery, it is a plurality of pass through between the positive pole portion of battery and the negative pole portion, between positive pole portion and the positive pole portion, or between negative pole portion and the negative pole portion electric connecting portion electricity is connected.

Further, the connecting piece with battery pack sets up in a laminated manner, the connecting piece is close to battery pack's one side surface is equipped with electric connection portion, and/or the connecting piece is kept away from battery pack's one side is equipped with electric connection portion.

Furthermore, a connecting hole is formed in the connecting piece corresponding to the position of the electric connection part, the connecting hole is used for enabling the positive electrode part or the negative electrode part to penetrate through, a conducting layer is arranged on the hole wall of the connecting hole, and the conducting layer is connected with the electric connection part.

Optionally, the electrical connection portion includes one or more first connection portions insulated from each other, and the negative electrode portion and the positive electrode portion of two adjacent batteries are electrically connected through the first connection portions, so that the plurality of batteries are connected in series.

Further, the plurality of batteries are arranged in parallel, and the positive electrode portions and the negative electrode portions of two adjacent batteries correspond to each other.

Optionally, the electrical connection portion includes a second connection portion and a third connection portion that are insulated from each other, the positive electrode portions of the plurality of batteries are electrically connected through the second connection portion, and the negative electrode portions of the plurality of batteries are electrically connected through the third connection portion, so that the plurality of batteries are connected in parallel.

Further, the plurality of batteries are arranged in parallel, and positive electrode portions and negative electrode portions of the plurality of batteries correspond to each other.

Optionally, the connecting piece is a PCB, and the connecting piece is provided with a battery protection module for performing overcurrent, overvoltage and overtemperature protection on the battery module.

Further, the positive pole portion and the negative pole portion of battery are the screw thread post, the connecting hole is the screw hole, positive pole portion and/or the negative pole portion with the connecting hole screw-thread fit makes the battery with connecting piece fixed connection.

Further, the battery also comprises a metal connecting block and a nut, the positive electrode part and/or the negative electrode part are/is fixed on the battery through the metal connecting block, and one end, far away from the battery, of the positive electrode part and/or the negative electrode part is in threaded fit with the nut, so that the battery is fixedly connected with the connecting piece.

The utility model has the advantages that:

the utility model provides a pair of battery module can realize the series-parallel connection of a plurality of batteries when connecting a plurality of batteries side by side through the connecting piece, and not only simple structure is small, and the installation effectiveness is high, and connects the reliability height, and the security is good, need not to use large-scale laser spot welding equipment simultaneously, low in production cost. On the other hand, the positive electrode part and/or the negative electrode part are/is fixed on the battery through the metal connecting block, and the nut is in threaded connection with one end, far away from the battery, of the positive electrode part and the negative electrode part, so that the electric connection part is more reliably connected with the positive electrode part and the negative electrode part of the battery, and the reliability of the battery module is further improved. In addition, set up battery protection module on the connecting piece, can realize carrying out protection such as overcurrent, excessive pressure, overtemperature to the battery module, when can improving the reliability of battery module, still can prolong its life.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention.

Fig. 1 is a schematic perspective view of the present invention;

FIG. 2 is an exploded view of the present invention;

fig. 3 is a front view of a connector according to an embodiment of the present invention;

fig. 4 is a front view of a connector according to another embodiment of the present invention.

Description of the main element symbols:

10-a battery assembly; 11-a battery; 111-positive pole part; 112-negative part; 113-metal connection block; 114-a rivet; 20-a connector; 21-a connection hole; 211-a conductive layer; 22-a battery protection module; 30-an electrical connection; 31-a first connection; 32-a second connection; 33-a third connecting portion; 40-nut.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

Hereinafter, the terms "including", "having", and their derivatives, which may be used in various embodiments of the present invention, are only intended to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.

In various embodiments of the present invention, the expression "a or/and B" includes any or all combinations of the words listed simultaneously, may include a, may include B, or may include both a and B.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "lateral", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used for convenience of description and simplicity of description only, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, for example, as mechanical connection, communication between two elements, direct connection, or indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention. The term "plurality" refers to two or more.

Referring to fig. 1 and 2, the present invention provides a battery module, which includes a battery assembly 10 and a connecting member 20, wherein the connecting member 20 is provided with an electrical connection portion 30, the battery assembly 10 includes a plurality of batteries 11, and the plurality of batteries 11 are connected by the connecting member 20 and connected in series and parallel by the electrical connection portion 30 to meet the power supply requirement of the user.

As shown in fig. 2, the battery 11 is a lithium ion battery, which may have a cylindrical shape or a rectangular parallelepiped shape, and the battery 11 of the present embodiment is a rectangular parallelepiped-shaped aluminum-case battery. The battery 11 is provided with a positive electrode portion 111 and a negative electrode portion 112, and in the present embodiment, the positive electrode portion 111 and the negative electrode portion 112 are provided on the same side of the battery 11. The positive electrode 111 and the negative electrode 112 are columnar, and can be fixed to one side of the battery 11 by a known connection method, and the positive electrode 111 and the negative electrode 112 in this embodiment are fixed to the side of the battery 11 by metal connection blocks 113. Specifically, as shown in fig. 2, the positive electrode and the negative electrode of the battery 11 are connected to the positive electrode portion 111 and the negative electrode portion 112 through the metal connection block 113, respectively, and the metal connection block 113 is fixed to the side portion of the battery 11 by the rivet 114, so that the positive electrode portion 111 and the negative electrode portion 112 are fixed to the side portion of the battery 11, and the connection is stable and reliable. The metal connecting block 113 is connected to the electrical connection portion 30, so that the positive electrode portion 111 and the negative electrode portion 112 are electrically connected to the electrical connection portion 30 more reliably. Of course, the connection of the positive electrode portion 111 and the negative electrode portion 112 to the side of the battery 11 is not limited thereto. The positive electrode portion 111 and the negative electrode portion 112 in the present embodiment may be made of a copper or aluminum material so as to have good conductive properties.

As shown in fig. 1, a connector 20 is provided on one side of the battery module 10, and the connector 20 is stacked on the battery module 10, wherein the connector 20 is provided on the side close to the battery 11 where the positive electrode portion 111 and the negative electrode portion 112 are provided, and is used for connecting the plurality of batteries 11 together so that the plurality of batteries 11 are juxtaposed to form a battery module. In order to reduce the volume of the battery module, the plurality of batteries 11 are connected in the same direction on the side where the positive electrode portion 111 and the negative electrode portion 112 are provided. Specifically, as shown in fig. 3, the connection member 20 has a plate shape and transitions through arcs at four inner corners of the connection member 20. The connector 20 is provided with an electrical connection portion 30 for electrically connecting a positive electrode portion 111 and a negative electrode portion 112 of the battery 11. The electrical connection portion 30 may be disposed on the surface of the connector 20 near the battery 11, on the surface of the connector 20 far from the battery 11, or on both the surface near the battery 11 and the surface far from the battery 11. When the electrical connection portion 30 is provided to both surfaces of the connector 20, the electrical connection portion 30 is electrically connected to the positive electrode portion 111 and/or the negative electrode portion 112 more reliably. The electrical connection portion 30 is made of a metal material, for example, the electrical connection portion 30 can be disposed on the connecting member 20 by a gold immersion process, but the electrical connection portion 30 can also be disposed on the connecting member 20 by other known methods. A plurality of connection holes 21, the number of which is twice the number of the batteries 11, for passing the positive electrode portion 111 or the negative electrode portion 112 of the batteries 11 therethrough are provided on the connector 20 at positions corresponding to the electrical connection portions 30. The hole wall of the connection hole 21 is provided with a conductive layer 211, the conductive layer 211 is electrically connected to the electrical connection portion 30, and the positive electrode portion 111 or the negative electrode portion 112 of the battery 11 is electrically connected to the electrical connection portion 30 through the conductive layer 211, thereby improving the reliability of the electrical connection between the positive electrode portion 111 or the negative electrode portion 112 and the connector 20. The conductive layer 211 may be formed on the wall of the connection hole 21 by a gold immersion process, and preferably, the conductive layer 211 may be subjected to the gold immersion process simultaneously with the electrical connection portion 30, thereby facilitating the process.

In one embodiment, as shown in fig. 1 and 3, taking the case that a plurality of batteries 11 are connected in series as an example, in this embodiment, the electrical connection portion 30 includes one or more first connection portions 31, the plurality of first connection portions 31 are insulated from each other, and the negative electrode portions 112 and the positive electrode portions 111 of two adjacent batteries 11 are electrically connected through the first connection portions 31, so that the plurality of batteries 11 are connected in series. Specifically, the positive electrode portions 111 of the adjacent two batteries 11 correspond to the negative electrode portions 112, the negative electrode portions 112 correspond to the positive electrode portions 111, and the first connection portions 31 correspond to the positive electrode portions 111 and the negative electrode portions of the adjacent two batteries 11, respectively. In order to improve the reliability of electrical connection between the positive electrode portions 111 and the negative electrode portions 112 of the batteries 11 and the first connection portion 31, the length of the first connection portion 31 in the arrangement direction of the battery modules is greater than or equal to the interval between the positive electrode portions 111 and the negative electrode portions 112 of two adjacent batteries 11. The number of the batteries 11 in the present embodiment may be set according to the actual power requirement, and only the size of the connector 20 and the number of the first connection portions 31 need to be changed. In order to facilitate subsequent installation, the electrode symbols and the corresponding serial numbers of the batteries 11 can be added to the corresponding connecting holes 21 on the connecting piece 20, so that the quick installation by an operator is facilitated, and the assembly efficiency is improved.

In another embodiment, as shown in fig. 4, a plurality of batteries 11 may be connected in parallel through a connection member 20. The electrical connection portion 30 is electrically connected to the positive electrode portion 111 and the negative electrode portion 112 of the plurality of batteries 11, respectively, and is used to arrange the plurality of batteries 11 in parallel. Specifically, the electrical connection portion 30 includes a second connection portion 32 and a third connection portion 33, wherein the second connection portion 32 corresponds to the positive electrode portions 111 of the plurality of batteries 11 for electrical connection with the positive electrode portions 111 of the plurality of batteries 11, respectively, and the third connection portion 33 corresponds to the negative electrode portions 112 of the plurality of batteries 11 for electrical connection with the negative electrode portions 112 of the plurality of batteries 11, respectively. In the present embodiment, the positive electrode portions 111 and the negative electrode portions 112 of any two adjacent batteries 11 correspond to the positive electrode portions 111 and the negative electrode portions 112, respectively. In order to improve the reliability of electrical connection between the positive electrode portions 111 and the second connection portions 32 and between the negative electrode portions 112 and the third connection portions 33, the lengths of the second connection portions 32 and the third connection portions 33 in the arrangement direction of the battery module in the present embodiment are greater than or equal to the intervals between the positive electrode portions 111 and between the negative electrode portions 112 of the first and last two batteries 11, respectively. It should be noted that the number of the batteries 11 in this embodiment can be set according to the actual power requirement, and only the sizes of the connecting member 20, the second connecting portion 32, and the third connecting portion 33 need to be changed. In order to facilitate subsequent installation, the electrode symbols and the corresponding serial numbers of the batteries 11 can be added on the connecting piece 20 corresponding to the connecting holes 21, so that the quick installation by an operator is facilitated, and the assembly efficiency is improved. In addition, in other embodiments, a plurality of batteries 11 may be combined in series and parallel as needed, and in this case, the size of the connecting member 20 and the size and position of the electrical connection portion 30 may be adaptively modified as needed.

As shown in fig. 3 and 4, the connection member 20 may be a PCB, that is, a connection hole 21 for connecting the positive electrode portion 111 and the negative electrode portion 112 is provided on the PCB, and an electrical connection portion 30 for connecting in series and/or in parallel is provided. A battery protection module 22 for protecting the battery module may be further provided on the connection member 20 as needed. The battery protection module 22 includes, but is not limited to, overvoltage protection, overcurrent protection, and over-temperature protection, so as to further improve the safety and reliability of the battery module.

As shown in fig. 2, both the positive electrode portion 111 and the negative electrode portion 112 may be provided as threaded posts, and the connection holes 21 are threaded holes, and when mounting, the connection holes 21 on the connector 20 are threaded with the positive electrode portion 111 and the negative electrode portion 112 of each battery 11, so that each battery 11 is connected together, and the battery 11 and the connector 20 are fixed. At this time, the positive electrode portion 111 and the negative electrode portion 112 are electrically connected to the electrical connection portion 30 provided on the side of the connector 20 close to the battery 11 through the metal connection block 113, respectively, so that the electrical connection reliability of the positive electrode portion 111 and the negative electrode portion 112 to the electrical connection portion 30 can be enhanced, thereby ensuring the reliability of series-parallel connection of the plurality of batteries 11. In addition, the battery module can also be provided with a plurality of nuts 40, and the plurality of nuts 40 are respectively in threaded connection with one ends, far away from the battery 11, of the positive electrode part 111 and the negative electrode part 112, so that the connecting piece 20 is fixed between the battery 11 and the nuts 40, at this time, the positive electrode part 111 and the negative electrode part 112 can be connected with the electric connection part 30 arranged on one side, far away from the battery 11, of the connecting piece 20 through the nuts 40, so that the connection among the plurality of batteries 11 is more reliable, meanwhile, the electric connection among the positive electrode part 111, the negative electrode part 112 and the electric connection part 30 of the battery 11 is more reliable, and the series-parallel connection reliability of the plurality of batteries 11 is further ensured.

The utility model discloses an on positive portion 111 and negative pole portion 112 of a plurality of batteries 11 were fixed in battery 11 through metal connecting block 113 to connecting hole 21 and nut 40 through on the connecting piece 20 connect into the battery module, rethread electric connecting portion 30 realizes the series-parallel connection, and need not to link together a plurality of batteries 11 through using adhesive etc. and not only simple structure, compactness, practice thrift the cost, and can not produce chemical pollution, energy-concerving and environment-protective.

Those skilled in the art will appreciate that the drawings are merely schematic representations of one preferred implementation scenario and that the blocks or flow diagrams in the drawings are not necessarily required to practice the present invention.

Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.

The above description is only exemplary of the preferred embodiments of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a battery module, its characterized in that, this module includes battery pack and connecting piece, battery pack includes a plurality of batteries, be equipped with electric connection portion on the connecting piece, be equipped with positive pole portion and negative pole portion on the battery, it is a plurality of pass through between the battery electric connection portion realizes electric connection, electric connection includes that positive pole portion is connected with negative pole portion, positive pole portion is connected with positive pole portion, negative pole portion is connected with negative pole portion in at least one.

2. The battery module according to claim 1, wherein the connecting member is stacked on the battery module, the electrical connection portion is provided on a surface of the connecting member near the battery module, and/or the electrical connection portion is provided on a side of the connecting member away from the battery module.

3. The battery module according to claim 2, wherein a connection hole is provided at a position corresponding to the electrical connection portion on the connection member, the connection hole being used for the positive electrode portion or the negative electrode portion to pass through, and a conductive layer is provided on a hole wall of the connection hole, the conductive layer being connected to the electrical connection portion.

4. The battery module according to claim 1, wherein the electrical connection part comprises one or more first connection parts insulated from each other, and the negative electrode part and the positive electrode part of two adjacent batteries are electrically connected through the first connection parts, so that the plurality of batteries are connected in series.

5. The battery module according to claim 4, wherein a plurality of the batteries are arranged in parallel, and the positive electrode portions and the negative electrode portions of two adjacent batteries correspond to each other.

6. The battery module according to claim 1, wherein the electrical connection part includes a second connection part and a third connection part insulated from each other, positive electrode parts of the plurality of batteries are electrically connected through the second connection part, and negative electrode parts of the plurality of batteries are electrically connected through the third connection part, so that the plurality of batteries are connected in parallel.

7. The battery module according to claim 6, wherein a plurality of the batteries are arranged in parallel, and a positive electrode portion of each of the plurality of batteries correspond to each other, and a negative electrode portion of each of the plurality of batteries corresponds to each other.

8. The battery module of claim 1, wherein the connecting member is a PCB, and a battery protection module for performing overcurrent, overvoltage and overtemperature protection on the battery module is arranged on the connecting member.

9. The battery module according to claim 3, wherein the positive electrode part and the negative electrode part of the battery are both threaded posts, the connection hole is a threaded hole, and the positive electrode part and/or the negative electrode part are/is in threaded fit with the connection hole so that the battery is fixedly connected with the connecting piece.

10. The battery module according to claim 9, further comprising a metal connecting block and a nut, wherein the positive electrode part and/or the negative electrode part is fixed to the battery through the metal connecting block, and one end of the positive electrode part and/or the negative electrode part, which is far away from the battery, is in threaded fit with the nut, so that the battery is fixedly connected with the connecting member.