CN111668434B - Battery module and vehicle with same - Google Patents

Battery module and vehicle with same Download PDF

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Publication number
CN111668434B
CN111668434B CN201910175990.5A CN201910175990A CN111668434B CN 111668434 B CN111668434 B CN 111668434B CN 201910175990 A CN201910175990 A CN 201910175990A CN 111668434 B CN111668434 B CN 111668434B
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China
Prior art keywords
pole
battery
battery unit
battery module
side wall
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CN201910175990.5A
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CN111668434A (en
Inventor
陈文会
谭晶
谭亮稳
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BYD Co Ltd
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BYD Co Ltd
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Publication of CN111668434A publication Critical patent/CN111668434A/en
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00Batteries for particular applications
    • H01M2220/20Batteries in motive systems, e.g. vehicle, ship, plane
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention discloses a battery module and a vehicle with the same, wherein the battery module comprises a first leading-out end and a second leading-out end, the battery module comprises a first battery unit and a second battery unit, the first battery unit is in an odd number, one of the first battery units is configured into the first leading-out end, the second battery unit is one and comprises three second electrodes, one of the second electrodes is arranged on the second side wall surface, and the second electrode is configured into the second leading-out end. According to the battery module, the first leading-out end and the second leading-out end of the battery module are arranged on different sides of the battery module, so that the connection is facilitated, meanwhile, an overlong copper bar is avoided, the safety performance of the battery module is high, parts are fewer, and the cost is low.

Description

Battery module and vehicle with same
Technical Field
The invention relates to the technical field of battery modules, in particular to a battery module and a vehicle with the same.
Background
In the related art, the battery cell has a positive electrode and a negative electrode provided at opposite sides of a battery cell main body, and thus the battery cells of the type used for mounting on a vehicle are combined to form a battery module in which a space for mounting the battery module is limited, that is, the volume of the battery module is limited, and the volume of the battery cell is determined, and in this limited volume, there is a case where only an even number of battery cells are accommodated. In order to facilitate connection of the wires, the leading-out directions of the total positive electrode (one of the first leading-out end and the second leading-out end) and the total negative electrode (the other of the first leading-out end and the second leading-out end) of the battery module are often required to be arranged on different sides of the battery module, and when the number of the battery units is even, the total positive electrode and the total negative electrode of the battery units are arranged on the same side of the battery module, so that the battery module is inconvenient to be connected with other circuit elements.
In order to meet the requirements of consistency of battery units and leading out of a total anode or a total cathode of a battery module in different directions, an electric connection copper bar is commonly used in the field to be led out from the other side of the battery module, the specific structure is shown in fig. 5, the overlong electric connection copper bar can increase the parts of the battery module, and the design and use cost is increased.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
Therefore, an object of the embodiment of the first aspect of the present invention is to provide a battery module with high safety performance.
An object of the embodiment of the second aspect of the invention is to provide a vehicle having the battery module.
According to the battery module of the embodiment of the first aspect of the present invention, the battery module includes a first side wall surface and a second side wall surface, the first side wall surface and the second side wall surface are disposed on different planes, the battery module includes a first lead-out terminal and a second lead-out terminal, the first lead-out terminal is disposed on the first side wall surface, the second lead-out terminal is disposed on the second side wall surface, the first lead-out terminal and the second lead-out terminal have opposite polarities, the battery module includes first battery cells and second battery cells, the first battery cells are odd-numbered, each first battery cell has two first electrodes, the first battery cell has opposite first and second ends, one of the first electrodes of the first battery cells is disposed at the first end, and the other of the first electrodes of the first battery cells is disposed at the second end, one of the plurality of first electrodes is configured as the first lead, one of the second battery cells is configured as the second lead, and the second battery cell includes three second electrodes, one of which is configured as the second lead.
According to the battery module provided by the embodiment of the invention, the battery module is provided with odd number of first battery units and one second battery unit, two first electrodes of the first battery units are arranged on different side wall surfaces of the battery module, the second battery unit is provided with three second electrodes, and a first leading-out end and a second leading-out end of the battery module are arranged on different side wall surfaces of the battery module, so that the battery module is convenient to electrically connect, and meanwhile, an overlong electric connection copper bar is avoided.
In addition, the battery module according to the embodiment of the present invention may further have the following technical features:
in some embodiments of the present invention, in the second battery cell, another one of the three second electrodes is disposed on the second side wall surface and has a polarity opposite to that of the second lead-out terminal.
In some embodiments of the invention, the first sidewall surface is adjacent to the second sidewall surface.
In some embodiments of the invention, the first sidewall surface is opposite to the second sidewall surface.
In some embodiments of the present invention, the battery module further includes a conductive connecting member, and any two adjacent first battery units are electrically connected through the conductive connecting member; the second battery unit is electrically connected with the adjacent first battery unit through the conductive connecting piece.
In some embodiments of the present invention, a plurality of the first battery cells are stacked and the second battery cells are connected to adjacent ones of the first battery cells and stacked, and any adjacent two of the first battery cells are connected in series.
In some embodiments of the invention, the number of the second battery unit is one, a plurality of the first battery units are connected in series with the second battery unit after being connected in series, one of the second electrodes is an anode and is disposed on the first side wall surface, the plurality of the first battery units and the second battery units are arranged in a direction from left to right, the plurality of the first battery units are numbered from left to right sequentially as 1, 2, 3, 4 to N, N is an odd number, the anode of the first battery unit numbered as 1 is configured as the first leading-out end, the cathode of the first battery unit numbered as 2 is connected to the anode of the first battery unit numbered as 2, the cathode of the first battery unit numbered as N is connected to the anode of the second battery unit disposed on the second side wall surface, the anode of the first battery unit numbered as N is connected to the cathode of the first battery unit numbered as N-1, in the first battery units numbered in the interval (1, N), the anodes of the first battery units numbered M are connected with the cathodes of the first battery units numbered M-1, the cathodes of the first battery units numbered M are connected with the anodes of the first battery units numbered M +1, the anodes of the first battery units numbered odd are arranged on the first side wall surface, the anodes of the first battery units numbered even are arranged on the second side wall surface, the cathodes of the second battery units arranged on the second side wall surface are constructed into the second leading-out end, and the first side wall surface is opposite to the second side wall surface.
In some embodiments of the present invention, the three second electrodes are a first pole, a second pole and a third pole, respectively, the first pole and the second pole are disposed on the second side wall surface, the second pole is configured as the second lead-out terminal, the third pole is disposed on the first side wall surface, and the second battery unit includes: a housing; the battery cell is arranged in the shell and provided with a first electrode lug and a second electrode lug; a first pole post penetrating the housing, the first pole post being electrically connected with the first tab to configure the first pole or the third pole; a second pole post extending through the housing, the second pole post electrically connected to the second pole ear to form the second pole.
In some embodiments of the invention, the housing comprises an electrically conductive portion, the first pole, the third pole and the electrically conductive portion are all electrically connected, the first pole and the third pole are of the same polarity; the second pole is connected with the shell in an insulating mode.
In some embodiments of the present invention, the housing includes a main body, a first end cap and a second end cap, both ends of the main body are open, the first end cap is disposed at one end of the main body to close one end of the main body, and the second end cap is disposed at the other end of the main body to close the other end of the main body.
In some embodiments of the invention, the first pole and the second pole are provided at the first end cap, at least a portion of the structure of the body portion, and at least a portion of the structure of the second end cap are electrically conductive and configured as the conductive portion, and a third pole is provided at the second end cap.
According to the vehicle provided by the embodiment of the second aspect of the invention, the battery module is convenient to mount, and the safety performance of the vehicle is high.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a battery module according to an embodiment of the present invention;
fig. 2 is a perspective view of a battery module according to one embodiment of the present invention;
fig. 3 is a plan view of a battery module according to one embodiment of the present invention;
FIG. 4 is a cross-sectional view of a second battery cell according to one embodiment of the invention;
fig. 5 is a perspective view of a battery module in the related art.
Reference numerals:
a battery module 100, a first side wall surface 101, a second side wall surface 102, a first lead-out terminal 103, a second lead-out terminal 104, a connecting piece 107,
a second battery unit 10, a first pole 11, a first pole column 111, a first pole ear 112, a second pole 12, a second pole column 121, a second pole ear 122, a third pole 13, a shell 14, a main body part 141, a first end cover 142, a second end cover 143, a battery core 15, a first battery unit 20, a conductive connecting member 30,
the battery pack 2, a first sidewall 201, a second sidewall 202, a third sidewall 203, a first battery cell 20, a first electrode 21, a first positive electrode 211, and a first negative electrode 212.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The space of the vehicle is limited, the installation space and the position of the existing battery module are limited except for the requirement of comfortable seat space and necessary components, the number of battery units in the battery module is further limited, and under the condition that the number of the battery units in the battery module is limited, the leading-out directions of the total positive electrode and the total negative electrode of the battery module are further limited, as shown in fig. 5, when an even number of first battery units form the battery module, the leading-out directions of the total positive electrode and the total negative electrode of the battery module are the same, and in the practical application process, the leading-out directions of the total positive electrode and the total negative electrode of the battery module are required to be different in order to facilitate the electric connection of the battery module and other components, in order to solve the technical problems, the specific structure is as shown in fig. 5, an electric connection copper bar is added to be connected with one of the positive electrode and the negative electrode of the battery module and led out from the corresponding side of the battery module, so as to change the electrode leading-out direction of the battery module; the inventor of the application finds that the design and arrangement difficulty is increased due to the arrangement of the electric connection copper bars because the space for installing the battery module is limited in actual production; the surface covering of electricity connection copper bar has anticreep protection architecture, but this anticreep protection architecture is in long-term vehicle driving process, and easy wearing and tearing or vibrations drop, increase electric leakage and safe risk to lead to the factor of safety of battery module to descend, and, because this electricity connection copper bar sets up in battery unit's surface, the inside temperature of battery unit can be increased after the copper bar is connected through the electricity to the heavy current.
In order to solve the above technical problems, the present inventors have improved this and have proposed the following technical solutions.
A battery module 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 4.
Specifically, as shown in fig. 1, 3 and 4, the battery module 100 includes a first sidewall 101 and a second sidewall 102, the first sidewall 101 and the second sidewall 102 are disposed on different planes, the battery module 100 includes a first terminal 103 and a second terminal 104, the first terminal 103 is disposed on the first sidewall 101, the second terminal 104 is disposed on the second sidewall 102, and the first terminal 103 and the second terminal 104 have opposite polarities. The first side wall surface 101 and the second side wall surface 102 may be two opposite side surfaces or two adjacent side surfaces.
The first leading-out end and the second leading-out end correspond to the total positive electrode and the total negative electrode of the battery module and are used for connecting other circuit elements, for example, the first leading-out end corresponds to the total positive electrode of the battery module, and the second leading-out end corresponds to the total negative electrode of the battery module; or the first leading-out end corresponds to the total negative electrode of the battery module, and the second leading-out end corresponds to the total positive electrode of the battery module.
The first and second terminals 103 and 104 have opposite polarities, for example, when the first terminal 103 is a positive electrode, the second terminal 104 is a negative electrode, or when the first terminal 103 is a negative electrode, the second terminal 104 is a positive electrode, wherein the first and second terminals 103 and 104 are disposed on different side wall surfaces of the battery module 100. The first terminal 103 and the second terminal 104 of the battery module 100 are used for connecting with other circuit elements, so that the first terminal 103 and the second terminal 104 of the battery module 100 can be led out from different directions of the battery module 100, thereby facilitating the connection with other circuit elements and avoiding winding.
In addition, it can be understood that, if the first terminal 103 and the second terminal 104 are disposed on the same side wall surface of the battery module 100, when the battery module 100 is electrically connected to other circuit elements, the leads are disposed on the same side wall surface of the battery module 100, and thus the leads are easily mixed up and may be short-circuited, which may cause a safety hazard. The first leading-out terminal 103 and the second leading-out terminal 104 are arranged on different side wall surfaces of the battery module 100, so that the circuit is regular, and the safety performance is high.
Specifically, the space of the vehicle is limited, and besides the requirement for a comfortable seat space and necessary components, the installation space and position of the battery module 10 are limited, and the limited installation space needs to be fully utilized to increase the capacity and voltage of the battery module, which further limits the thickness and number of the battery units, and further limits the leading-out directions of the total positive electrode and the total negative electrode of the battery module under the condition that the number of the battery units in the battery module is limited, for example, when an even number of first battery units form the battery module, the first leading-out terminal and the second leading-out terminal of the battery module can only be led out on the same side wall surface of the battery module; in order to facilitate the electrical connection between the battery module and other components and ensure the safety and the cycle life of the battery module, the first leading-out end and the second leading-out end are led out from different side wall surfaces of the battery module under the condition that the total number of the battery units is not changed, therefore, odd number of first battery units and a third-electrode second battery unit are matched and connected, a plurality of first battery units with consistent structures are adopted, and the first battery units are improved on the basis of the first battery units to obtain the third-electrode second battery unit, so that the consistency is met to the maximum extent; meanwhile, the arrangement can meet the requirement that the first leading-out end and the second leading-out end are led out from different side wall surfaces of the battery module, so that the battery module 10 can meet different connection requirements.
As shown in fig. 1 and 2, the battery module 100 includes first battery cells 20 and second battery cells 10, the first battery cells 20 are odd-numbered, each first battery cell 20 has two first electrodes 21, the first battery cell 20 has a first end and a second end opposite to each other, one first electrode 21 of each first battery cell 20 is disposed at the first end, the other first electrode 21 of the first battery cell 20 is disposed at the second end, one of the first electrodes 21 is configured as a first lead-out terminal 103, the second battery cell 10 is one and the second battery cell 10 includes three second electrodes (not shown), one of the second electrodes is disposed on the second side wall surface 102 and the second electrode is configured as a second lead-out terminal 104.
That is, the battery module 100 is composed of an odd number of the first battery cells 20 and one second battery cell 10, for example, the number of the first battery cells 20 is one, three, five, seven or more, while it is preferable that the number of the second battery cells 10 is one.
The odd number of first battery cells 20 and one second battery cell 10 are stacked and electrically connected in sequence, the two first electrodes 21 of the first battery cell 20 are provided at opposite ends of the first battery cell 20, that is, the first positive electrode 211 and the first negative electrode 212 of the first battery cell 20 are provided at opposite ends of the first battery cell 20, the first positive electrodes 211 and the first negative electrodes 212 of the adjacent two first battery cells 20 are connected, and the adjacent two first battery cells 20 are reversely mounted, for example, the positive electrode of one first battery cell 20 is provided at the upper end, the negative electrode is provided at the lower end, the first positive electrode of one first battery cell 20 adjacent thereto is provided at the first end of the first battery cell 20, and the first negative electrode is provided at the second end of the first battery cell 20, whereby, when the plurality of first battery cells 20 are connected in series, the length of the connection member for connecting the first positive electrode 211 of one first battery cell 20 and the first negative electrode 212 of the other first battery cell 20 is shortest, the material is saved, the production difficulty is reduced, the overhigh temperature of the battery module 100 is avoided, and the safety performance of the battery module 100 is improved.
In addition, as shown in fig. 1 in conjunction with fig. 4, the second battery cell 10 includes three second electrodes, two of the three second electrodes have the same polarity, the other second electrode has the opposite polarity, the two second electrodes having the same polarity are disposed on different sidewall surfaces, and the other second electrode having the opposite polarity may be disposed on the same sidewall surface or on a different sidewall surface from the one second electrode. For example, two of the second electrodes are positive electrodes, the other second electrode is a negative electrode, the two positive electrodes are respectively disposed at the first end and the second end of the second battery unit 10, the negative electrode can be disposed at the first end or the second end of the second battery unit 10, and the negative electrode can also be disposed at the side of the second single body. Of course, one of the second electrodes may be a negative electrode, and the other of the second electrodes may be a positive electrode.
Further, as shown in fig. 1 and 2, one of odd number of first electrodes 21 is configured as a first lead terminal 103, and one of three second electrodes is configured as a second lead terminal 104. That is, one of the first positive electrodes may be the first lead-out terminal 103, one of the first negative electrodes may be the first lead-out terminal 103, and one of the three second electrodes may be the second lead-out terminal 104. When one of the first positive electrodes is the first lead-out terminal 103, the negative electrode or one of the negative electrodes of the second battery unit 10 is the second lead-out terminal 104, and when one of the first negative electrodes is the first lead-out terminal 103, the positive electrode or one of the negative electrodes of the second battery unit 10 is the second lead-out terminal 104.
The first terminal 103 and the second terminal 104 are disposed on different sidewalls of the battery module 100, and the polarities of the first terminal 103 and the second terminal 104 are opposite.
In one specific example, as shown in fig. 1, first battery cells 20 are stacked, and the second battery cells are connected to and stacked adjacent to the first battery cells, and any two adjacent first battery cells are connected in series. Odd number of first battery units 20 and one second battery unit 10 are stacked, two adjacent first battery units 20 are reversely mounted, one first electrode 21 of the first battery unit 20 is a first positive electrode 211, the other first electrode 21 of the first battery unit 20 is a first negative electrode 212, the first positive electrode of the first battery unit 20 arranged at the outermost side of the battery module 100 is a first leading-out terminal 103, two second electrodes of the second battery unit 10 are arranged on the same side wall surface of the second battery unit 10 and have opposite polarities, further, the positive electrode of the first battery unit 20 and the two second electrodes arranged on the same side wall of the second battery unit 10 are arranged on the same surface of the battery module 100, therefore, the even number of the battery cells can realize that the first lead-out terminal and the second lead-out terminal are led out from different side wall surfaces of the battery module, and the total length of the conductive connecting member 30 is short.
It is easily understood that the sum of the number of the odd number of first battery cells 20 plus one second battery cell 10 is an even number, and as mentioned in the background of the present application, in the practical production application, the battery module 100 is used for being mounted on a vehicle, the space for mounting the battery module 100 is limited, that is, the volume of the battery module 100 is limited, and the volume of the battery cells is determined, and in this limited volume, only the even number of first battery cells may be accommodated. In order to facilitate connection with other circuit elements, it is often necessary that the total positive electrode and the total negative electrode of the battery module 100 are led out in different directions of the battery module 100, and when the number of the battery units is even, the total positive electrode and the total negative electrode of the battery units are disposed on the same side of the battery module 100, which is inconvenient to install.
In order to meet the consistency of the battery units and meet the requirement that a customer needs to lead out the total positive electrode or the total negative electrode from different side wall surfaces of the battery module, an electric connection copper bar is conventionally used in the field to be led out from the other side of the battery module, and the overlong electric connection copper bar can increase 100 parts of the battery module and increase the design and use cost; the space in the battery system is limited, and the design and arrangement difficulty is increased; the increase of the electric connection copper bar in the battery increases electric leakage and safety risk; the heavy current passes through the electricity and connects the copper bar, and this electricity connection copper bar sets up again with the battery surface, can increase the inside temperature of battery, influences the life of battery.
This application can avoid using longer electricity to connect the copper bar through setting up odd number first battery cell 20 and a second battery cell 10, and battery module 100's spare part is less, simple structure, and the cost is lower, and the space that occupies is less, also can not make the inside temperature of battery rise, and the security performance has also obtained the guarantee.
Therefore, according to the battery module 100 of the embodiment of the invention, even number of battery units can also realize that the first leading-out terminal and the second leading-out terminal are led out in different directions of the battery module, so that the battery module is conveniently connected with other circuit elements, overlong electric connection copper bars are avoided, parts are reduced, and the safety performance is higher.
In the related art, the battery module generally includes a plurality of first battery cells, and therefore, the electrodes cannot be led out from both sides, which causes great inconvenience to the circuit installation. It can be understood that under the condition of a certain installation space, for example, the installation space can only be used for installing even number of single batteries, and the application only needs to replace one of the original first battery units with the second battery unit, so that the assembly and forming processes of the battery module are not large in difference, the consistency with the original battery module is ensured, and the cost is reduced.
The first lead-out terminal is connected with one connecting sheet 107, and the second lead-out terminal is connected with the other connecting sheet 107, so that the lead can be conveniently and electrically connected with the first lead-out terminal and the second lead-out terminal by arranging the connecting sheet 107.
In the above embodiment, the plurality of first battery cells 20 may be connected in parallel, for example, by connecting the first positive electrode of one first battery cell 20 to the first positive electrode of another first battery cell 20, the plurality of first battery cells 20 may be connected in parallel, and the amount of charge in the battery module 100 may be increased.
In addition, in the above-described embodiment, the number of the second battery cells 10 is not limited to one, and for example, the second battery cells 10 may be two, three, four or more as long as the first and second lead-out terminals are led out in different directions of the battery module without affecting the battery module 100.
In some embodiments, the battery module 100 further includes a conductive connecting member 30, and any two adjacent first battery units 20 are electrically connected through the conductive connecting member 30; the second battery cell 10 is electrically connected to the adjacent first battery cell 20 through the conductive connection member 30. The first battery unit 20 and the second battery unit 10 are both battery units, that is, any two adjacent battery units are electrically connected through the conductive connecting member 30, and the conductive connecting member 30 is electrically connected with the positive electrode of one battery unit and the negative electrode of the other battery unit. This makes it possible to connect a plurality of battery cells in series and increase the output voltage of the battery module 100. Preferably, the conductive connection member 30 connects two adjacent battery cells, thereby making the length of the conductive connection member 30 short, facilitating the connection, and also making the structure of the battery cells clear.
In some embodiments, in each second battery unit 10, another one of the three second electrodes is disposed on the second sidewall surface 102, and the polarity of the second electrode is opposite to that of the second lead-out terminal 104. The two second electrodes disposed on the second side wall surface 102 are respectively a positive electrode and a negative electrode, the second electrode disposed on the first side wall surface 101 may be a positive electrode or a negative electrode, one of the two second electrodes disposed on the second side wall surface 102 is a second leading-out terminal 104, that is, the second leading-out terminal 104 may be a positive electrode or a negative electrode, when the second leading-out terminal 104 is a positive electrode, the second electrode disposed on the second side wall surface 102 is a negative electrode, and when the second leading-out terminal 104 is a negative electrode, the second electrode disposed on the second side wall surface 102 is a positive electrode. It can be understood that an odd number of first battery cells 20 are stacked, the conductive connection members 30 are respectively connected to the first electrodes 21 and the second electrodes, and the polarity of the first electrode 21 of the first battery cell 20 adjacent to the second battery cell 10 is the same as that of the second lead-out terminal 104 and is opposite to that of the other second electrode provided on the second side wall surface 102, so that the first electrode 21 and the second electrode can be connected nearby, which is beneficial to shortening the length of the conductive connection member 30 and improving safety performance.
In some embodiments, the first sidewall surface 101 is adjacent to the second sidewall surface 102.
In some embodiments, the first sidewall 101 is opposite to the second sidewall 102.
That is, the first and second terminals 103 and 104 may be disposed at opposite sides of the battery module 100, and the first terminal 103 may also be disposed at adjacent sides of the battery module 100. In other words, the present application can arbitrarily set the positions of the first and second terminals 103 and 104 to facilitate the connection of the circuit according to actual needs.
In a specific embodiment, the number of the second battery unit is one, the plurality of first battery units are connected in series with the second battery unit after being connected in series, one second electrode is a positive electrode and is arranged on the first side wall surface, the plurality of first battery units and the second battery unit are arranged along the direction from left to right (wherein, the left and right directions are shown in fig. 1 and fig. 2), the plurality of first battery units are numbered from left to right in sequence from 1, 2, 3, 4 to N, N is an odd number, the positive electrode of the first battery unit numbered 1 is configured as a first leading-out end, the negative electrode of the first battery unit numbered 2 is connected with the positive electrode of the first battery unit numbered 2, the negative electrode of the first battery unit numbered N is connected with the positive electrode of the second battery unit arranged on the second side wall surface, the positive electrode of the first battery unit numbered N is connected with the negative electrode of the first battery unit numbered N-1, the number of the first battery units in the interval (1, N) is that the positive pole of the first battery unit with the number M is connected with the negative pole of the first battery unit with the number M-1, wherein M is more than 1 and less than N, the negative pole of the first battery unit with the number M is connected with the positive pole of the first battery unit with the number M +1, the positive pole of the first battery unit with the number odd is arranged on the first side wall surface, the positive pole of the first battery unit with the number even is arranged on the second side wall surface, the negative pole of the second battery unit arranged on the second side wall surface is constructed into a second leading-out end, and the first side wall surface is opposite to the second side wall surface.
In some embodiments, as shown in fig. 1, the three second electrodes are a first pole 11, a second pole 12, and a third pole 13, the first pole 11 and the second pole 12 are disposed on the second side wall surface 102, the second pole 12 is configured as a second lead-out 104, the third pole 13 is disposed on the first side wall surface 101, the second battery unit 10 includes a housing 14, a battery cell 15, a first pole post 111, and a second pole post 121, the battery cell 15 is disposed in the housing 14, the battery cell 15 has a first tab 112 and a second tab 122, the first pole post 111 penetrates through the housing 14, the first pole post 111 is electrically connected to the first tab 112 to configure the first pole 11 or the third pole 13, the second pole post 121 penetrates through the housing 14, and the second pole post 121 is electrically connected to the second tab 122 to configure the second pole 12.
It will be understood that the first, second and third poles 11, 12, 13 described above are relative only and are not specific to a particular component. The first pole 11 and the second pole 12 are disposed on the second sidewall 102, and the polarities of the first pole 11 and the second pole 12 are opposite, for example, the first pole 11 is a positive pole, and the second pole 12 is a negative pole, or the first pole 11 is a negative pole, the second pole 12 is a positive pole, and one of the first pole 11 and the second pole 12 is a second lead-out terminal 104.
In some optional embodiments, as shown in fig. 1, the second battery unit 10 includes a battery cell 15, a first pole column 111, a second pole column 121, and a casing 14, where the battery cell 15 is disposed in the casing 14, the first pole column 111 penetrates through the casing 14, the second pole column 121 penetrates through the casing 14, a first pole tab 112 and a second pole tab 122 are disposed on the battery cell 15, the first pole tab 112 is connected to the first pole column 111, and the second pole tab 122 is connected to the second pole column 121. The first pole column 111 and the second pole column 121 constitute a first positive electrode or a first negative electrode of the second battery unit 10, wherein the first pole column 111 and the second pole column 121 may be simultaneously disposed on the first side wall surface 101, the first pole column 111 and the second pole column 121 may also be disposed on the first side wall surface 101, the second pole column 121 is disposed on the second side wall surface 102, and the first tab 112 and the second tab 122 are connected to the battery cell 15.
In some embodiments, the housing 14 includes a conductive portion (not shown), the first pole 11 and the third pole 13 are electrically connected to the conductive portion, and the second pole 12 is electrically insulated from the housing 14. Thus, the first pole column 111 and the first tab 112 form the first pole 11 or the third pole 13, and the third pole 13 is electrically connected to the first pole 11 through the conductive portion. The second pole 12 is insulated from the housing 14 to avoid short circuits.
No matter how the second pole 121 is mounted on the housing 14, the insulation between the second pole 121 and the housing 14 is only required to be realized, and the electrical connection between the first pole 111 and the first pole tab 112 through the housing is not affected.
First utmost point post 111 and second utmost point post 121 all can be installed on second lateral wall face 102, and first utmost point post 111 and second utmost point post 121 all locate the same end of casing 14 promptly, have saved the space from this, have improved space utilization, make the space that holds electric core 15 as far as possible big under the limited dimensional condition of second battery unit 10, have improved electric core 15's capacity for the structure of battery is compacter and more lightweight.
In one embodiment, the first and third poles are negative poles, the second pole is positive pole, the first tab 112 is electrically connected to the housing 14, the first tab 112 is electrically connected to the first pole 111 through the housing 14, and the second tab 122 is electrically connected to the second pole 121. The first pole column 111 and the first tab 112 led out from the battery cell 15 are both electrically connected to the housing, that is, the first tab 112 is electrically connected to the first pole column 111 through the housing 14, and when discharging, the current flow direction in the second battery unit 10 is: the battery comprises a first pole column 111, a shell 14, a first tab 112, a battery cell 15, a second tab 122 and a second pole column 121; during charging, the current flows in the opposite direction to that during discharging. Thereby making the current in the second battery cell 10 uniform and also making the heat generation of the second battery cell 10 uniform. In addition, since the current flows from the first pole 111 to the first pole tab 112 through the housing 14, the heat of the second battery unit 10 can be dissipated through the housing 14, the heat dissipation area is increased, and the service life and the safety of the second battery unit 10 are correspondingly increased. In addition, since the first pole post 111 is electrically connected to the housing 14, for example, the first pole post 111 can be directly welded to the housing 14, so that the mounting structure for mounting the pole post to the housing 14 is simple as a whole, thereby reducing the manufacturing cost of the second battery cell 10. It should be noted that the second pole piece 121 may be hermetically and insulatively mounted on the second battery cell 10 by an insulating sealing member. The second battery unit 10 may be a rectangular parallelepiped, and the battery cell 15 may be a flat winding battery cell 15 or a laminated battery cell 15. In addition, the first pole column 111 is a positive pole column, the second pole column 121 is a negative pole column, and correspondingly, the first tab 112 can be a positive tab and the second tab 122 can be a negative tab, so that the casing 14 is not easy to be negatively charged, the risk of corrosion of the casing 14 is reduced, and the use safety and the service life of the second battery unit 10 are improved. In the case that the first tab 112 is a positive tab, the housing 14 is made of an aluminum shell, so that the risk of corrosion of the housing 14 can be reduced, and the safety and the service life of the second battery unit 10 can be improved. Similarly, if the first tab 112 is a negative tab, the casing 14 is made of copper to reduce corrosion, improve safety and prolong service life.
In one embodiment, as shown in fig. 1 and 4, the housing 14 includes a main body 141, a first end cap 142 and a second end cap 143, wherein both ends of the main body 141 are open, the first end cap 142 is disposed at one end of the main body 141 to close one end of the main body 141, and the second end cap 143 is disposed at the other end of the main body 141 to close the other end of the main body 141. The battery cell 15 is disposed in the casing 14, and the first end cap 142 and the second end cap 143 are used to seal the corresponding opening ends, the two cover plates are disposed on two opposite end faces of the battery respectively, and the two cover plates are both provided with electrode posts, in this design, the electrode post of one polarity of the second battery unit 10 can be led out in two different directions. The first pole 111 and the second pole 121 of the second battery unit 10 are arranged on the first end cover 142 and are led out in the same direction; a third pole 13 is arranged on the second end cap 143, and the third pole 13 can be led out in the other direction. Meanwhile, the second electrode can also be arranged on the other side faces of the battery, so that the first leading-out end and the second leading-out end can be led out in any direction of the battery module.
In specific implementation, in order to facilitate multi-directional extraction of the electrode of the second battery unit 10, the first tab 112, which is required to be extracted in multiple directions, of the battery may be conducted with the housing 14, and the extraction of the first extraction end and the second extraction end in any direction of the battery module may be more conveniently achieved through the housing 14.
In some embodiments, the first pole 11 and the second pole 12 are disposed on the first end cap 142, the body portion 141 and the second end cap 143 are electrically conducted and configured as a conductive portion, the first pole 11 and the third pole 13 are electrically connected to the first end cap 142, the first pole 11 and the third pole 13 have the same polarity (when the first pole is a positive pole, the third pole is a positive pole; when the first pole is a negative pole, the third pole is a negative pole), the second pole 12 is electrically insulated from the first end cap 142, and the third pole 13 is disposed on the second end cap 143. Therefore, the first end cap 142 and the second end cap 143 both have a sealing function and a conductive function, which is beneficial to reducing the number of parts of the battery module 100 and reducing the cost.
At least a part of the structure of the first end cap 142, at least a part of the structure of the second end cap 143, and at least a part of the structure of the body portion 141 are electrically conducted and configured as an electrically conductive portion. The above-mentioned at least part means that it may be a part or all, that is, a part or all of the first end cap 142, a part or all of the second end cap 143, and a part or all of the body portion 141 are electrically conducted and configured as an electrically conductive portion.
The battery module 100 according to the embodiment of the present invention, as shown in fig. 1, includes a battery pack 2 and a second battery cell 10.
Specifically, as shown in fig. 1, the battery pack 2 includes a first sidewall 201, a second sidewall 202, and a third sidewall 203, the first sidewall 201 is opposite to the second sidewall 202, the battery pack 2 includes an odd number of first battery cells 20 connected in sequence, the first battery cell 20 disposed at the initial position has a first positive electrode 211 and a first negative electrode 212, the first lead-out terminal is disposed on the first sidewall 201, and the first positive electrode 211 is a positive electrode of the battery module 100.
The battery pack 2 includes a plurality of first battery cells 20 connected in series, each of the first battery cells 20 having a first positive electrode 211 and a first negative electrode 212, the first positive electrode 211 and the first negative electrode 212 being provided on first and second side walls 201 and 202 opposite to each other.
In other words, the battery pack 2 is composed of a plurality of first battery units 20 connected in sequence, the first positive electrode 211 and the first negative electrode 212 of each first battery unit 20 are disposed on the first side wall 201 and the second side wall 202 which are opposite to each other, that is, the first lead-out terminal 103 may be disposed on the first side wall 201, the first lead-out terminal 103 may also be disposed on the second side wall 202, and the first lead-out terminal 103 is one of the first positive electrode 211 and the first negative electrode 212.
As shown in fig. 1 and 2, the second battery unit 10 is disposed on the third sidewall 203, the second battery unit 10 includes a first pole 11, a second pole 12 and a third pole 13, the second pole 12 is a negative pole of the battery module 100, the second pole 12 is disposed on a plane where the second sidewall 202 is located or the second pole 12 is disposed on a plane perpendicular to the second sidewall 202, and at least one of the first pole 11 and the third pole 13 is a positive pole of the second battery unit 10.
In other words, the second pole 12 is disposed on the second side wall 202 opposite to the first side wall 201 or on a plane perpendicular to the second side wall 202, that is, the second pole 12 may be disposed on the side of the second battery unit 10, the second pole 12 is a negative pole, at least one of the first pole 11 and the third pole 13 is a positive pole, for example, the first pole 11 is a positive pole, the third pole 13 is a negative pole, or both the first pole 11 and the third pole 13 are positive poles, or the third pole 13 is a negative pole, and the first pole 11 is a positive pole. Therefore, the first lead-out terminal 103 and the second lead-out terminal 104 can be led out from the first side wall 201 or the second side wall 202 or the direction perpendicular to the first side wall 201 and the second side wall 202 of the battery module, lead-out terminals in different directions can be arranged according to actual needs, and connection is facilitated.
It can be understood that, if the first terminal 103 and the second terminal 104 are disposed in the same direction of the battery module 100, when the battery module 100 is electrically connected to other circuit elements, the leads are disposed on the same side of the battery module 100, and thus the leads are easily mixed up and may be shorted, which may result in a safety hazard. The first leading-out terminal 103 and the second leading-out terminal 104 are arranged on different sides of the battery module 100, so that the circuit is regular, and the safety performance is high.
Therefore, according to the battery module 100 of the embodiment of the invention, the first lead-out terminal 103 and the second lead-out terminal 104 can be led out in different directions of the battery module 100, and the battery module 100 has fewer parts and higher safety performance.
The vehicle according to the embodiment of the invention includes the battery module 100 described above. The battery module 10 sets up and installs on the vehicle, and under the unchangeable condition of battery module installation space, battery unit quantity, this battery module 10 can satisfy first leading out end and second and draw forth the end and draw forth on the different side wall faces of battery module, makes things convenient for the electricity that battery module and other circuit elements are connected to be connected, omits the electricity and connects the copper bar simultaneously to can reduce spare part quantity, improve the security and the cycle life of battery module.
The first side wall surface, the second side wall surface, and the first side wall, the second side wall, and the third side wall are all virtual planes provided for easy understanding, and are not solid planes, and are not to be construed as limiting the scope of the present invention.
Other configurations and operations of vehicles according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (6)

1. A battery module is characterized in that the battery module comprises a first side wall surface and a second side wall surface, the first side wall surface and the second side wall surface are arranged on different planes,
the battery module comprises a first leading-out end and a second leading-out end, the first leading-out end is arranged on the first side wall surface, the second leading-out end is arranged on the second side wall surface, the polarities of the first leading-out end and the second leading-out end are opposite, the first leading-out end and the second leading-out end correspond to the total positive pole and the total negative pole of the battery module,
the battery module comprises a first battery unit and a second battery unit, the number of the first battery units is odd, each first battery unit is provided with two first electrodes, the first battery unit is provided with a first end and a second end which are opposite, one first electrode of the first battery unit is arranged at the first end, the other first electrode of the first battery unit is arranged at the second end, one of the first electrodes is configured as the first leading-out end,
the second battery unit is one and includes three second electrodes, one of the second electrodes is configured as the second lead-out terminal, another one of the three second electrodes is disposed on the second side wall surface and has a polarity opposite to that of the second lead-out terminal, the three second electrodes are respectively a first pole, a second pole and a third pole, the first pole and the second pole are disposed on the second side wall surface, the second pole is configured as the second lead-out terminal, and the third pole is disposed on the first side wall surface,
the battery module also comprises a conductive connecting piece, and any two adjacent first battery units are electrically connected through the conductive connecting piece; the second battery unit is electrically connected with the adjacent first battery unit through the conductive connecting piece,
a plurality of the first battery cells are arranged in a stacked manner, and the second battery cell is connected with the adjacent first battery cells and arranged in a stacked manner, any two adjacent first battery cells are connected in series,
the plurality of first battery units are connected in series with the second battery unit after being connected in series, one of the second electrodes is an anode and is arranged on the first side wall surface, the plurality of first battery units and the second battery unit are arranged along the direction from left to right, the plurality of first battery units are sequentially numbered from left to right as 1, 2, 3, 4 to N, N is an odd number, the anode of the first battery unit numbered as 1 is constructed as the first leading-out end, the cathode of the first battery unit is connected with the anode of the first battery unit numbered as 2, the cathode of the first battery unit numbered as N is connected with the anode of the second battery unit arranged on the second side wall surface, the anode of the first battery unit numbered as N is connected with the cathode of the first battery unit numbered as N-1, and the anode of the first battery unit numbered as (1, n) interval, the number is M the positive pole of first battery unit with the number is M-1 the negative pole of first battery unit links to each other, the number is M the negative pole of first battery unit with the number is M +1 the positive pole of first battery unit links to each other, wherein, the number is the odd the positive pole of first battery unit is located first lateral wall, the number is the even the positive pole of first battery unit is located second lateral wall, locate of second battery unit the negative pole on the second lateral wall is constructed and is drawn forth the end the second, first lateral wall with the second lateral wall is relative.
2. The battery module according to claim 1, wherein the second battery cell comprises:
a housing;
the battery cell is arranged in the shell and provided with a first electrode lug and a second electrode lug;
a first pole post penetrating the housing, the first pole post being electrically connected with the first tab to configure the first pole or the third pole;
a second pole post extending through the housing, the second pole post electrically connected to the second pole ear to form the second pole.
3. The battery module according to claim 2, wherein the case includes a conductive portion,
the first pole, the third pole and the conducting part are all electrically connected, and the polarities of the first pole and the third pole are the same;
the second pole is connected with the shell in an insulating mode.
4. The battery module according to claim 3, wherein the housing comprises a main body part, a first end cap and a second end cap, wherein both ends of the main body part are open, the first end cap is arranged at one end of the main body part to close one end of the main body part, and the second end cap is arranged at the other end of the main body part to close the other end of the main body part.
5. The battery module according to claim 4, wherein the first pole and the second pole are provided at the first end cap, at least a part of the structure of the body portion, and at least a part of the structure of the second end cap are electrically conducted and configured as the conductive portion,
the third pole is arranged on the second end cover.
6. A vehicle characterized by comprising the battery module according to any one of claims 1 to 5.
CN201910175990.5A 2019-03-08 2019-03-08 Battery module and vehicle with same Active CN111668434B (en)

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JP2010135148A (en) * 2008-12-03 2010-06-17 Nissan Motor Co Ltd Cell unit, battery module, and battery pack
JP2012138234A (en) * 2010-12-27 2012-07-19 Aatec:Kk Battery holder with serial/parallel switching mechanism
JP6162459B2 (en) * 2013-04-11 2017-07-12 三洋電機株式会社 Battery pack
CN103456996B (en) * 2013-08-30 2016-01-20 广州力柏能源科技有限公司 A kind of lithium ion battery and conjuncted Li-ion batteries piles
KR101821378B1 (en) * 2014-03-31 2018-01-23 주식회사 엘지화학 Battery module having improved coupling force and processibility between electrode lead and bus bar and battery pack including the same
JP6060335B2 (en) * 2015-04-24 2017-01-18 エクセルギー・パワー・システムズ株式会社 Reversible fuel cell with third electrode
CN205846138U (en) * 2016-06-23 2016-12-28 苏州添蓝动力科技有限公司 The combinative structure of lithium battery bag
CN106785068B (en) * 2017-01-08 2019-09-10 合肥国轩高科动力能源有限公司 Three electrode soft-package batteries of one kind and preparation method thereof
JP2018116893A (en) * 2017-01-20 2018-07-26 株式会社東芝 Battery cell and battery pack
JP6645999B2 (en) * 2017-03-21 2020-02-14 株式会社東芝 Rechargeable battery, battery pack, and vehicle

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