CN110265618A - Single battery, power battery pack and vehicle - Google Patents
Single battery, power battery pack and vehicle Download PDFInfo
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- CN110265618A CN110265618A CN201910544125.3A CN201910544125A CN110265618A CN 110265618 A CN110265618 A CN 110265618A CN 201910544125 A CN201910544125 A CN 201910544125A CN 110265618 A CN110265618 A CN 110265618A
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- Prior art keywords
- tab
- electrode terminal
- single battery
- battery
- pole piece
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
This application discloses a kind of single battery, power battery pack and vehicle, the single battery, comprising: shell and be located at the intracorporal pole piece of the shell；The shell has multiple faces, is at least equipped with there are two the face and the electrode terminal for being used for extracted current outside the shell is electrically connected and extended with the pole piece, the electrode terminal at least two on each face；The pole piece is equipped with tab, and the electrode terminal is electrically connected by the tab with the pole piece；600mm < L, wherein L is the length of the single battery.The single battery of the application, when its multipair positive and negative electrode terminals is connected to, the path of current lead-through can be shortened, improve overcurrent, reduce impedance, when its single pair positive and negative electrode terminals is connected to, the positive and negative electrode terminals not being connected to can be used as backup electrode terminal, and in this way in battery cell failure, the maintenance of whole packet can be realized by backup electrode terminal, the entire length of battery is big, and battery capacity is big.
Description
Technical field
This application involves technical field of vehicle manufacture, dynamic more particularly, to a kind of single battery, with the single battery
Power battery pack and vehicle with the power battery pack.
Background technique
In recent years, the performance requirement of greatly developing with new-energy automobile, on-vehicle battery also increases accordingly.It is wherein industrial
Combine that have printed and distributed " planning of automobile industry Long-and Medium-term Development " clear China dynamic with information-based portion, National Development and Reform Commission, the Department of Science and Technology
Power battery target, arrives the year two thousand twenty, and lithium-ion-power cell monomer specific energy is greater than 300Wh/kg；System specific energy is striven for reaching
260Wh/kg；Cost is less than 1 yuan/Wh；Use environment is from subzero 30 DEG C to 55 DEG C；Have 3C charging ability, strives reality within 2025
Existing single battery 350Wh/kg.
In order to achieve the above objectives, on-vehicle battery enterprise actively researches and develops, and by being widely used for ternary material, increases monomer
The energy density of battery.By the structure optimization of battery modules or battery pack, the mesh of power battery lightweight and densification is realized
Mark.It is more using technological means such as welding, bondings during lightweight and the realization of densification, to reach reduction battery
The purpose of inner structural members, space utilization rate, reduction process flow so as to improve battery pack, reduces cost.But such connection
Mode but to the reprocessing of battery, safeguard and bring difficulty.Such as the welding position of battery electrode column, since present on-vehicle battery is most only
Using a positive or negative pole leads component, once battery repairs, the safety and conveyance capacity of electrical connection are considered, it is used
Pole can not carry out secondary welding.In addition, between battery using bonding after, due to the inconvenience of disassembly, when wherein there is battery
After failure, reprocesses difficulty and cost is all higher.
Summary of the invention
The application aims to solve at least one of the technical problems existing in the prior art.For this purpose, the purpose of the application
It is to propose a kind of single battery, can be by backup electrode terminal overcurrent in single electrode terminal faults, and single battery
Design accuracy is low, conveyance capacity is strong.
According to the single battery of the embodiment of the present application, comprising: shell and be located at the intracorporal pole piece of the shell；The shell tool
There are multiple faces, is at least equipped with there are two the face and be electrically connected and extend the shell with the pole piece and be used for extracted current outside
Electrode terminal, the electrode terminal at least two on each face；The pole piece is equipped with tab, the electrode tip
Son is electrically connected by the tab with the pole piece；600mm < L, wherein L is the length of the single battery.
The single battery of the application can shorten the road of current lead-through when being connected to its multipair positive and negative electrode terminals
Diameter improves overcurrent, reduces impedance, and when being connected to its single pair positive and negative electrode terminals, the positive and negative electrode terminals not being connected to can be made
The maintenance of whole packet, and monomer can be realized by backup electrode terminal in this way in battery cell failure for backup electrode terminal
The structure design of battery is more in line with standardization, and versatility is more preferably.
The application also proposed a kind of power battery pack.
According to the power battery pack of the embodiment of the present application, comprising: battery pack housing；It is multiple such as above-mentioned any embodiment institute
The single battery stated, the single battery are installed in the battery pack housing.
The application has also been proposed a kind of vehicle.
According to the vehicle of the embodiment of the present application, it is provided with power battery pack described in any of the above-described kind of embodiment.
The vehicle, the power battery pack and above-mentioned single battery compared with the existing technology possessed by advantage phase
Together, details are not described herein.
The additional aspect and advantage of the application will be set forth in part in the description, and will partially become from the following description
It obtains obviously, or recognized by the practice of the application.
Detailed description of the invention
The above-mentioned and/or additional aspect and advantage of the application will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is the structural schematic diagram according to the single battery of the embodiment of the present application；
Fig. 2 is the structural schematic diagram according to the pole piece of the single battery of the embodiment of the present application.
Appended drawing reference:
Single battery 100,
Pole piece 1, sub- battery core 11, positive plate 111, negative electrode tab 112, positive pole ear 113, negative lug 114, diaphragm 115.
Specific embodiment
Embodiments herein is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the application, and should not be understood as the limitation to the application.
Below with reference to Fig. 1-Fig. 2 description according to the single battery 100 of the embodiment of the present application, there is multipair electrode terminal,
When its multipair positive and negative electrode terminals is connected to, the path of current lead-through can be shortened, improve overcurrent, reduce impedance, by its
When single pair positive and negative electrode terminals are connected to, the positive and negative electrode terminals not being connected to can be used as backup electrode terminal, in this way in monomer electricity
When 100 failure of pond, the maintenance of whole packet can be realized by backup electrode terminal, and the structure design of single battery 100 more accords with
Standardization, versatility is more preferably.
As Figure 1-Figure 2, according to the single battery of the embodiment of the present application 100, wherein the length of single battery 100 is full
Foot: 600mm < L, and in some specific execution, 600mm < L≤1300mm, such as L=800mm or L=900mm, then
Or L=1200mm, the length dimension of single battery 100 in the range when, the overall structure of single battery 100 more meets mark
The design of standardization can be universally used in different power battery packs 1000, to expand the scope of application.
In some embodiments, the length of single battery 100 is L, and the width of single battery 100 is H, single battery 100
With a thickness of T, meet: 10 < L/H, and in some specific execution, 10 < L/H≤20,23≤L/T≤200, such as L/H=
12, L/T=60 or L/H=14, L/T=120, then L/H=18, L/T=180.Single battery 100 is each as a result,
Design size in the range when, the design of the overall structure of single battery 100 more complying with standard can be universally used in different dynamic
Power battery pack 1000, to expand the scope of application.
And the entire length of single battery 100 is larger, so that single battery 100 has biggish capacitance, is conducive to improve
Course continuation mileage, and the Proportionality design of the length and width of single battery 100, thick size is conducive to promote the energy of entire power battery pack 1000
Metric density, volume ratio is more preferably.
Wherein, single battery 100 includes: shell and pole piece 1.
Pole piece 1 is located in shell, and shell has multiple faces, and at least two faces in multiple faces are equipped with electrode terminal, electricity
Extreme son is electrically connected with pole piece 1, and electrode terminal extends outside shell, to be used for extracted current, is convenient for single battery as a result,
100 to external charge and discharge.
As shown in Figure 1 and Figure 2, the electrode terminal at least two on each face, as shown in Figure 1, the first side of shell
Electrode terminal on (left side in Fig. 2) is two, as shown in Figure 1, the electrode in the second side (right side in Fig. 2) of shell
Terminal is two, i.e., is all provided on opposite two face of shell there are two electrode terminal, wherein the electrode terminal on two faces can
Face setting, can also be arranged in a staggered manner, in this way, shell includes at least four electrode terminals, four electrode terminals are used equally for electric current
Conducting.Certainly, electrode terminal can also be set on adjacent two face of shell, as the left side of shell and leading flank are equipped with electricity
The right side and trailing flank of extreme son or shell are equipped with electrode terminal, what same achievable pole piece 1 was connected with foreign current
Effect.Wherein, electrode terminal can be column, can also be sheet, can specifically be selected according to actual installation demand.
In this way, pole piece 1 can be connected by multipair electrode terminal with foreign current when single battery 100 is installed and used, with
Increase the path number that single battery 100 is connected with foreign current, improves overcurrent, reduce impedance, prevent when single battery 100
Internal resistance is excessive when structure size meets the range of the application design, improves the reasonability that single battery 100 designs, and is promoted practical
Property.
The connection status of multipair electrode terminal can flexible choice, when single battery 100 is assembled into battery pack, multipair electrode
Terminal and pole piece 1 connect into a plurality of current flow paths, to increase the number in the path of electric current extraction, wherein portion of electrical current stream
Path can simultaneously turn on, and can also individually be connected, and can be selected according to reality with electricity condition, flexibility is more preferably.
In the equal current lead-through of four electrode terminals, electric current is optionally drawn by the electrode terminal of side, without
The collection flow path of entire battery pole piece is flowed through, dual flow path or the conducting of multithread road is realized, the interior of single battery 100 can be greatly reduced
Resistance improves the conveyance capacity of single battery 100, and compared to single-entry single-out, the efficiency for charge-discharge of the single battery 100 of the application is more
Height more conducively saves the charge and discharge time of user, and practicability is more preferably.
When single battery 100 to be installed on battery pack and be used for charge and discharge, at least one current flow paths be can be used as
It is spare.As a result, in 100 failure of single battery, the standby current circulation path of adjacent single battery 100 can be connected to continue
Carry out current lead-through, battery pack still can normal use, be not required to that single battery 100 is removed replacement immediately, it is user-friendly, it is sharp
It is reprocessed with subsequent.
As shown in Fig. 2, pole piece 1 is equipped with tab, electrode terminal is electrically connected by tab with pole piece 1, i.e. the both ends of tab
It can be electrically connected respectively with electrode terminal and pole piece 1, guarantee to stablize between electrode terminal and pole piece 1, effectively realize electric current
Conducting, and the electric current in pole piece 1 is drawn, it is convenient for 100 charge and discharge of single battery.
As shown in Fig. 2, the electrode terminal at least provided with two tabs on pole piece 1, on a face of a tab and shell
Electrical connection, another tab are electrically connected with the electrode terminal on another face of shell, are drawn convenient for the electric current of pole piece 1.
It can be increased according to the single battery 100 of the embodiment of the present application when being connected to its multipair positive and negative electrode terminals
The path number of current lead-through, shortens the torrent path of electric current, improves overcurrent, reduces impedance, by its single pair positive and negative electrode end
When son connection, the positive and negative electrode terminals not being connected to can be used as backup electrode terminal, can in this way in 100 failure of single battery
To realize the maintenance of whole packet by backup electrode terminal, and the battery capacity of single battery 100 is big, and cruising ability is stronger, monomer
The structure design of battery 100 is more in line with standardization, and versatility is more preferably.
In some embodiments, shell has first end face and second end face, first end face and the setting of second end face face,
First end face is equipped at least two electrode terminals, and second end face is equipped at least two electrode terminals, as shown in Fig. 2, shell
First end face (left side in Fig. 2) set there are two electrode terminal, the second end face (right side in Fig. 2) of shell sets that there are two electricity
Extreme son.Wherein, the partial electrode terminal on the same face is used to be electrically connected with load or battery, by the electricity of single battery 100
It can draw and be used for outside.
Pole piece 1 has a first end and a second end, and extends multiple first tabs in first end, and multiple first tabs form the
One tab group, extends multiple second tabs in second end, and multiple second tabs form the second tab group, the first end of pole piece 1
It is formed with the first tab group, the second end of pole piece 1 is formed with the second tab group, wherein the electrode terminal in first end face and
One tab is electrically connected, and the electrode terminal in second end face is electrically connected with the second tab.
In some embodiments, the multiple electrodes terminal in first end face is connect with the first tab group, in second end face
Multiple electrodes terminal is connect with the second tab group, and the first tab group, the second tab group are electrically connected with pole piece 1, in this way, pole piece 1
It can be connected by a plurality of current flow path with foreign current, improve the conveyance capacity of single battery 100.
Wherein, in one embodiment, the polarity of the electrode terminal on each face is identical, and the first end of pole piece 1 is extended
Multiple first tabs, multiple first tabs form one group of first tab group, and first end face is equipped with multiple anode electrode terminals, more
A anode electrode terminal is connected with the first tab group, and the second end of pole piece 1 extends multiple second tabs, multiple second poles
Ear forms one group of second tab group, and second end face is equipped with multiple negative electrode terminals, multiple negative electrode terminals with this
Two tab groups are connected, and the polarity of the electrode terminal in first end face is anode as a result, the pole of the electrode terminal in second end face
Property is cathode.
Alternatively, the first end of pole piece 1 extends multiple first tabs, multiple first tabs form the first tab of at least two groups
Group, first end face are equipped with multiple anode electrode terminals, at least one and one group of first tab group of multiple anode electrode terminals
It is connected, at least one of multiple anode electrode terminals is connected with another group of the first tab group.The second end of pole piece 1 is extended multiple
Second tab, multiple second tabs form the second tab of at least two groups group, and second end face is equipped with multiple negative electrode terminals, more
At least one of a negative electrode terminal is connected with one group of second tab group, multiple negative electrode terminals at least one with it is another
The second tab group of group is connected, and the polarity of the electrode terminal in first end face is anode as a result, the electrode terminal in second end face
Polarity be cathode.
In further embodiments, it is equipped with anode electrode terminal and negative electrode terminal on each face, the first of pole piece 1
Multiple first tabs are extended at end, and multiple first tabs form the first tab of at least two groups group.
First end face be equipped with anode electrode terminal and negative electrode terminal, second end face be equipped with anode electrode terminal and
Negative electrode terminal, first end face and second end face are equipped with anode electrode terminal and negative electrode terminal as a result,.First tab
Group is at least two, and the second tab group is at least two, wherein the first tab group includes positive pole ear group and negative lug group, the
Two tab groups include positive pole ear group and negative lug group, and positive pole ear group is connect with anode electrode terminal, negative lug group
It is connect with negative electrode terminal.
Anode electrode terminal in first end face is connected with the positive pole ear group in the first tab group, negative in first end face
Pole electrode terminal is connected with the negative lug group in the first tab group, anode electrode terminal and the second tab group in second end face
In positive pole ear group be connected, the negative electrode terminal in second end face is connected with the negative lug group in the second tab group.
It is additionally provided with the first lead-out tablet between electrode terminal and the first tab group in first end face, it is multiple in first end face
Electrode terminal is connect with the first lead-out tablet, and the contact length of the first lead-out tablet and the first tab group is the width of the first tab group
L21 and/or the electrode terminal in second end face and it is additionally provided with the second lead-out tablet between the second tab group, it is more in second end face
A electrode terminal is connect with the second lead-out tablet, and the contact length of the second lead-out tablet and the second tab group is the width of the second tab group
L22。
It can be seen from the above, the first lead-out tablet and the second lead-out tablet can be arranged simultaneously, the first lead-out tablet can also be separately provided, or
The second lead-out tablet is separately provided in person, can be selectively arranged according to actual connection requirement, to meet electrode terminal and pole
The connection of ear needs, and guarantees pole piece 1 and the good current lead-through of electrode terminal.
Wherein, the first lead-out tablet and the second lead-out tablet extend towards pole piece, in this way, pole piece 1 and electrode terminal pass through pole
Ear, lead-out tablet realize electrical connection, as a result, by be arranged lead-out tablet can reduce because the length of electrode terminal or tab it is too small caused by
Poor contact guarantees that tab, electrode terminal are effectively contacted with the first lead-out tablet or the second lead-out tablet, improves single battery
The stability of 100 current lead-through, convenient for being used for a long time.
In some embodiments, the both ends of shell all have end plate, and end plate is equipped with for the electrode with external electrical connections
Terminal, electrode terminal run through end plate, the i.e. both ends of the electrode terminal two sides that extend to end plate respectively, wherein the first of electrode terminal
End is located in shell, so that the first end of electrode terminal is electrically connected with pole piece 1, the second end of electrode terminal is located at outside shell.Electricity
The second end of extreme son is used to be electrically connected with external for equipment, in this way, can be by the power output in single battery 100 to outer
The electrical equipment in portion.Or the second end of electrode terminal is connect with adjacent single battery 100, by multiple single batteries 100
Series connection, and then make multiple 100 charge and discharge simultaneously of single battery, improve the service efficiency of battery pack.
As shown in Fig. 2, shell includes first end plate and the second end plate, i.e. end plate includes first end plate and the second end plate,
End plate and the second end plate are located at the both ends of pole piece 1, and the both ends of pole piece 1 are equipped with tab.
First end plate is equipped with first electrode terminal and second electrode terminal, and the second end plate is equipped with first electrode terminal and second
Electrode terminal, first electrode terminal and second electrode terminal run through corresponding end plate, wherein first electrode terminal and second electrode
The polarity of terminal is different, and if first electrode terminal is positive electrode terminal, second electrode terminal is cathode electrode terminal.
First end plate and the second end plate are equipped with anode electrode terminal and negative electrode terminal as a result, i.e. first end plate is set
There are anode electrode terminal and negative electrode terminal, the second end plate is equipped with anode electrode terminal and negative electrode terminal, as a result, each
Single battery 100 includes at least two anode electrode terminals and two negative electrode terminals.Anode electrode terminal and negative electrode
Terminal runs through corresponding end plate, in this way, power storage element can also be led to by a pair of of positive and negative anodes electrode terminal and external electrical connections
Cross two pairs of positive and negative anodes electrode terminals while and external electrical connections.
In this way, when single battery 100 is installed on battery pack, path number that single battery 100 is connected with foreign current
Increase, impedance reduces, overcurrent enhancing.Single battery 100 designs multiple electrodes terminal as a result, can reduce single electrode terminal
Size, reduces the sealing and manufacture difficulty of single electrode terminal, while improving conveyance capacity, and the use of single battery 100 can be improved
Safety and stability.
In some embodiments, at least one of first end plate and the second end plate are equipped with lead-out tablet, and lead-out tablet is towards pole
The side of core 1, lead-out tablet are directly electrically connected with corresponding tab and corresponding electrode terminal, i.e. the inner end of lead-out tablet and tab electricity
Connection, the outer end of lead-out tablet are electrically connected with electrode terminal, in this way, pole piece 1 can realize electricity by tab, lead-out tablet with electrode terminal
Connection, in this way, by be arranged lead-out tablet can reduce because electrode terminal or tab length it is too short caused by poor contact, guarantee pole
Ear, electrode terminal are effectively contacted with lead-out tablet, the stability of the current lead-through of single battery 100 are improved, convenient for making for a long time
With.
Wherein, the contact width of lead-out tablet and tab is L2, i.e. the width L2 of tab is that contact of the lead-out tablet with tab is wide
Degree, and the width of lead-out tablet is not less than the contact width of tab, the overcurrent width of lead-out tablet and tab is tab itself as a result,
Width L2, and the width of tab is larger.In this way, it is ensured that there is splendid overcurrent efficiency between lead-out tablet and tab, improve single
The conveyance capacity of body battery 100.
In some embodiments, the both ends of pole piece 1 are respectively equipped with the tab group that multiple tabs are formed, and tab group includes anode
Tab group and negative lug group, positive pole ear group are electrically connected with anode electrode terminal, negative lug group and negative electrode terminal electricity
Connection, it should be noted that positive pole ear group includes multiple positive pole ears, at least one of multiple positive pole ears and outside
The electrical connection of anode electrode terminal, negative lug group includes multiple negative lugs, at least one of multiple negative lugs and outside
The electrical connection of negative electrode terminal, in this way, can be according to actual using the tab for needing to select to be correspondingly connected with electrode terminal
Quantity, selection flexibly, are adjusted flexibly in the utilization being easy to implement.
In some embodiments, single pole piece 1 is accommodated in shell, one end and the anode electrode terminal of the pole piece 1 are electrically connected
It connects, the other end is electrically connected with negative electrode terminal.Wherein, pole piece 1 can be stacked pole piece 1, i.e. pole piece 1 is stacked for multiple pole pieces
It is formed, in this way, the both ends of each pole piece are electrically connected with the electrode terminal on two end plates respectively, guarantees pole piece 1 and electrode terminal
With good conductive capability.Certainly, pole piece 1 can also be winding-type pole piece 1, the effect of same achievable current lead-through.
In some embodiments, as shown in Figure 1, pole piece 1 includes: multiple sub- battery cores 11.
As shown in Figure 1, sub- battery core 11 contains positive plate 111 and negative electrode tab 112, set between positive plate 111 and negative electrode tab 112
There is diaphragm 115, positive plate 111 and negative electrode tab 112 can be effectively spaced apart by diaphragm 115, so that positive plate 111 and negative electrode tab
112 keep normal current flowing state, prevent positive plate 111 and negative electrode tab 112 from interfering, and avoid 111 He of positive plate
112 contact short circuit of negative electrode tab improves the safety of single battery 100.Wherein, the area of diaphragm 115 is greater than positive plate 111, bears
Pole piece 112, in this way, diaphragm 115 can effectively completely cut off positive plate 111 and negative electrode tab 112.
Positive plate 111 is electrically connected with positive pole ear 113, and negative electrode tab 112 is electrically connected with negative lug 114, as shown in Figure 1,
Pole piece 1 includes the positive plate 111 and another sub- battery core of 1 sub- battery core 11 in 11,2 sub- battery cores 11 of the sub- battery core of at least two
11 negative electrode tab 112 is disposed adjacent.It is stacked in this way, battery core is intersected by multiple positive plates 111 and multiple negative electrode tabs 112, so that single
The battery capacity of body battery 100 effectively increases, and the electric current for being easy to implement battery core is drawn.
Wherein, the positive pole ear 113 of every sub- battery core 11 is identical with the lead direction of negative lug 114, two neighboring son
The lead direction of tab is on the contrary, as shown in Figure 1, first positive pole ear 113 and cathode in 2 sub- battery cores 11 in battery core 11
Tab 114 is drawn towards first direction (left side in Fig. 1), second positive pole ear 113 and cathode pole in 2 sub- battery cores 11
Ear 114 is drawn towards second direction (right side in Fig. 1), multiple tabs of single battery 100 never ipsilateral extraction respectively as a result,
Convenient for the integrally-built dispersed placement of single battery 100, so that the overall structure distribution of single battery 100 is more uniform.
In some embodiments, multiple sub- battery cores 11 are stacked along the thickness direction of single battery 100, as shown in Figure 1,
Single battery 100 includes that 2 sub- battery cores, 11,2 sub- battery cores 11 are stacked along the thickness direction of single battery 100, so that respectively
A sub- battery core 11 mutually steadily contacts, and is stably maintained in shell, and realization is relatively fixed, and in every sub- battery core 11
Positive pole ear 113 and negative lug 114 are arranged in a staggered manner along the width direction of single battery 100, in this way, can avoid positive pole ear
113 and the position of negative lug 114 excessively concentrate, prevent 114 contact short circuit of positive pole ear 113 and negative lug, provide
The safety of single battery 100.
In some embodiments, single pole piece 1 is accommodated in shell, one end and the anode electrode terminal of the pole piece 1 are electrically connected
It connects, the other end is electrically connected with negative electrode terminal.Wherein, pole piece 1 can be stacked pole piece 1, i.e. pole piece 1 is stacked for multiple pole pieces
It is formed, in this way, the both ends of each pole piece are electrically connected with the electrode terminal on two end plates respectively, guarantees pole piece 1 and electrode terminal
With good conductive capability.Certainly, pole piece 1 can also be winding-type pole piece 1, the effect of same achievable current lead-through.
In some embodiments, the pole piece in pole piece 1 further include: collector.
Wherein, tab is integrated with collector, and tab and collector are copper foil or the die cut formation of aluminium foil, as a result, a side
Face tab rapid shaping reduces process costs, and another aspect tab and the transmission performance of collector one galvanic current are more preferable, and pole
The shape of ear can be die cut by actual demand, be easy to shaping structures, can flexibly be used.
In further embodiments, the pole piece of pole piece 1 includes collector, collector include containing the electrode material area of coverage and
The insulating materials area of coverage, wherein the insulating materials area of coverage is between tab and the electrode material area of coverage, and the insulating materials area of coverage
Both with insulation material layer, in this way, tab and electrode material area of coverage insulation gap can be opened by insulation material layer, avoid
Contact short circuit improves the safety and stability that 1 electric current of pole piece is drawn.
In some embodiments, single battery 100 further include: explosion-proof valve.
Wherein, explosion-proof valve is set to the end plate of shell set on shell, such as explosion-proof valve, and explosion-proof valve is located at two electrode terminals
Outside, explosion-proof valve can be used as the pressure relief device of single battery 100, in single battery 100 pressure anomaly, it is excessively high when unload
Pressure, so that the pressure in accommodating chamber is maintained in safer range, in this way, the internal pressure of single battery 100 can be prevented
Substantially bulk expansion deformation is crossed, the safety and stability that single battery 100 uses is improved.
The application also proposed a kind of power battery pack.
According to the power battery pack of the embodiment of the present application, comprising: the monomer in battery pack housing and multiple above-described embodiments
Battery 100.
Wherein, single battery 100 is contained in battery pack housing, and multiple single batteries 100 are successively arranged setting, Duo Gedan
The top and bottom of body battery 100 keep concordant.In this way, the electrode terminal of multiple single batteries 100 can pass through connection sheet string
Connection gets up, multiple single batteries 100 can charge and discharge simultaneously, improve the efficiency for charge-discharge of power battery pack, improve power battery pack
Battery capacity.
The application also proposed a kind of vehicle.
According to the vehicle of the embodiment of the present application, it is provided with the power battery pack of above-described embodiment, the monomer of power battery pack
When 100 failure of battery, other monomers battery 100 still can normal use, guarantee vehicle there is stable power output always, promoted
The practicability of vehicle and safety, and power battery pack is easy to maintenance.
Specific embodiment
Embodiment 1
Single battery includes shell, is located at the intracorporal pole piece of shell, is respectively equipped on two faces of shell and is electrically connected with pole piece
And extending electrode terminal of the shell for extracted current, the electrode terminal on each face is 2；Pole piece is equipped with tab, electricity
Extreme son is electrically connected by tab with pole piece；L is the length of the single battery, and H is the width of the single battery, L/H=
11, L=700mm, single battery is labeled as S1.
Embodiment 2
Compared with Example 1, distinctive points are that L/H=13, L=800mm, single battery are labeled as S2.
Embodiment 3
Compared with Example 1, distinctive points are that L/H=15, L=900mm, single battery are labeled as S3.
Embodiment 4
Compared with Example 1, distinctive points are that L/H=17, L=1000mm, single battery are labeled as S4.
Embodiment 5
Compared with Example 1, distinctive points are that L/H=23, L=1200mm, L/T=80, single battery are labeled as S5.
Embodiment 6
Compared with Example 1, distinctive points are that L/H=11, L=1300mm, L/T=200, single battery are labeled as S6.
Comparative example 1
Compared with Example 1, distinctive points are that respectively there is one group of tab at the both ends of pole piece, respectively have on two opposite faces of shell
One electrode terminal, single battery are labeled as D1
Comparative example 2
Compared with Example 2, distinctive points are that respectively there is one group of tab at the both ends of pole piece, respectively have on two opposite faces of shell
One electrode terminal, single battery are labeled as D2.
Comparative example 3
Compared with Example 1, distinctive points are that L/H=2.5, L=400mm, single battery are labeled as D3.
Test method
1) battery DC impedance (DCIR)
Test equipment: charge and discharge electric cabinet
Test method: adjustment equipment measures electric discharge DCIR parameter, embodiment under the conditions of room temperature, 50%SOC, 1.5C@30s
1- embodiment 6, comparative example 1- comparative example 3, test result is shown in Table 1.(test method is this field common methods)
2) overcurrent temperature rise
Test equipment: charge and discharge electric cabinet, thermocouple, Agilent data collector
Test method: adjustment equipment measures anode electrode terminal and draws under the conditions of adiabatic environment 2C continues charge-discharge test
Slice temperature rise parameter, embodiment 1- embodiment 6, comparative example 1- comparative example 3, test result is shown in Table 1.(test method is this field
Common methods)
3) energy efficiency is tested
Test equipment: charge and discharge electric cabinet
Test method: electrical connection charge and discharge electric cabinet measures last time charge-discharge energy under the conditions of 1C continues charge and discharge 3 times
Efficiency parameters, embodiment 1- embodiment 6, comparative example 1- comparative example 3, test result is shown in Table 1.(test method is that this field is common
Method)
Table 1
| Serial number | DCIR | Temperature rise | Energy efficiency |
| Embodiment 1 | 0.65-0.77 | 10-13℃ | 92%-94% |
| Embodiment 2 | 0.69-0.83 | 11-17℃ | 91-93% |
| Embodiment 3 | 0.8-0.94 | 14-18℃ | 90%-92% |
| Embodiment 4 | 0.9-1.1 | 18-22℃ | 89%-91% |
| Embodiment 5 | 1.0-1.2 | 17-20℃ | 90%-93% |
| Embodiment 6 | 0.9-1.1 | 16-20℃ | 89%-92% |
| Comparative example 1 | 1.5-2.0 | 20-25℃ | 83%-87% |
| Comparative example 2 | 1.7-2.2 | 22-27℃ | 86%-88% |
| Comparative example 3 | 1.9-2.5 | 25-30℃ | 87%-89% |
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means specific features described in conjunction with this embodiment or example, knot
Structure, material or feature are contained at least one embodiment or example of the application.In the present specification, to above-mentioned term
Schematic representation may not refer to the same embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can be combined in any suitable manner in any one or more of the embodiments or examples.
While there has been shown and described that embodiments herein, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle and objective of the application, this
The range of application is defined by the claims and their equivalents.
Claims (21)
1. a kind of single battery (100) characterized by comprising
Shell and be located at the intracorporal pole piece of the shell (1)；
The shell has multiple faces, and it is described equipped with being electrically connected and extending with the pole piece (1) that at least there are two the faces
The electrode terminal of extracted current, the electrode terminal at least two on each face are used for outside shell；
The pole piece (1) is equipped with tab, and the electrode terminal is electrically connected by the tab with the pole piece (1)；
600mm < L, wherein L is the length of the single battery (100).
2. single battery (100) according to claim 1, which is characterized in that 600mm < L≤1300mm.
3. single battery (100) according to claim 1, which is characterized in that 10 L/H≤20 <, wherein H is the list
The thickness of body battery (100).
4. single battery (100) according to claim 1 or 3, which is characterized in that the shell has first end face and the
Biend, the first end face are equipped at least two electrode terminals, and the second end face is equipped with described at least two
Electrode terminal；
The pole piece (1) has a first end and a second end, and extends multiple first tabs in the first end, and multiple described first
Tab forms the first tab group, extends multiple second tabs in the second end, and multiple second tabs form the second pole
Ear group；
The electrode terminal in the first end face is electrically connected with first tab, the electrode in the second end face
Terminal is electrically connected with second tab.
5. single battery (100) according to claim 4, which is characterized in that multiple electricity in the first end face
Extreme son is connect with the first tab group, and multiple electrode terminals in the second end face and the second tab group connect
It connects.
6. single battery (100) according to claim 4, which is characterized in that the electrode tip in the first end face
It is sub that the first lead-out tablet is additionally provided between the first tab group, multiple electrode terminals in the first end face with it is described
The contact length of the connection of first lead-out tablet, first lead-out tablet and the first tab group is the width of the first tab group
Degree；
And/or the electrode terminal in the second end face and the second lead-out tablet, institute are additionally provided between the second tab group
The multiple electrode terminals stated in second end face are connect with second lead-out tablet, second lead-out tablet and second pole
The contact length of ear group is the width of the second tab group.
7. single battery (100) according to claim 1, which is characterized in that the electrode terminal on each face
Polarity it is identical.
8. single battery (100) according to claim 4, which is characterized in that the first end face is equipped with anode electrode
Terminal and negative electrode terminal, the second end face are equipped with anode electrode terminal and negative electrode terminal.
9. single battery (100) according to claim 8, which is characterized in that described first tab group at least two, it is described
Second tab group at least two；
The first tab group includes positive pole ear group and negative lug group, and the second tab group includes positive pole ear group and bears
Pole tab group.
10. single battery (100) according to claim 9, which is characterized in that the positive pole ear group and the anode electricity
Extreme son connection, the negative lug group are connect with the negative electrode terminal.
11. single battery described in any one of -7 (100) according to claim 1, which is characterized in that the shell includes first
End plate and the second end plate, the first end plate and second end plate are located at the both ends of the pole piece, the pole piece (1)
Both ends are equipped with the tab；
The first end plate is equipped with first electrode terminal and second electrode terminal, and second end plate is equipped with the first electrode end
The sub and described second electrode terminal, the first electrode terminal and the second electrode terminal run through corresponding end plate.
12. single battery (100) according to claim 11, which is characterized in that the first end plate and the second end
The side towards the pole piece (1) of at least one of plate is equipped with lead-out tablet, the lead-out tablet and the corresponding tab and right
The electrode terminal is answered directly to be electrically connected, the lead-out tablet is the width of the tab with the contact length of the corresponding tab.
13. single battery described in any one of -7 (100) according to claim 1, which is characterized in that the pole piece (1) includes:
Multiple sub- battery cores (11), the sub- battery core (11) contain positive plate (111) and negative electrode tab (112), and the positive plate (111) is electrically connected
It is connected to positive pole ear (113), the negative electrode tab (112) is electrically connected with negative lug (114)；
The positive pole ear (113) of each sub- battery core (11) is identical with the lead direction of negative lug (114), and adjacent two
The lead direction of tab is opposite in a sub- battery core (11).
14. single battery (100) according to claim 13, which is characterized in that multiple sub- battery cores (11) are along described
The thickness direction of single battery (100) is stacked, the positive pole ear (113) in each sub- battery core (11) and described
Negative lug (114) is arranged in a staggered manner along the width direction of the single battery (100).
15. single battery described in any one of -7 (100) according to claim 1, which is characterized in that accommodated in the shell
The single pole piece (1).
16. single battery described in any one of -7 (100) according to claim 1, which is characterized in that in the pole piece (1)
Pole piece further include: collector, the tab are integrated with the collector.
17. single battery described in any one of -7 (100) according to claim 1, which is characterized in that the pole of the pole piece (1)
Piece includes collector, and the collector contains the electrode material area of coverage and the insulating materials area of coverage, the insulating materials area of coverage
Between the tab and the electrode material area of coverage, the insulating materials area is covered with insulation material layer.
18. single battery described in any one of -7 (100) according to claim 1, which is characterized in that the part electricity on the same face
Extreme son with load or battery for being electrically connected.
19. single battery described in any one of -7 (100) according to claim 1, which is characterized in that further include: explosion-proof valve, institute
Explosion-proof valve is stated set on the shell, and is located at the outside of two electrode terminals.
20. a kind of power battery pack characterized by comprising
Battery pack housing；
Multiple single batteries (100) as described in any one of claim 1-19, the single battery (100) are contained in described
In battery pack housing.
21. a kind of vehicle, which is characterized in that have power battery pack as claimed in claim 20.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910544125.3A CN110265618A (en) | 2019-06-21 | 2019-06-21 | Single battery, power battery pack and vehicle |
| PCT/CN2019/092732 WO2020252803A1 (en) | 2019-06-21 | 2019-06-25 | Single cell battery, power battery pack and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910544125.3A CN110265618A (en) | 2019-06-21 | 2019-06-21 | Single battery, power battery pack and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110265618A true CN110265618A (en) | 2019-09-20 |
Family
ID=67920437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910544125.3A Pending CN110265618A (en) | 2019-06-21 | 2019-06-21 | Single battery, power battery pack and vehicle |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110265618A (en) |
| WO (1) | WO2020252803A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112889181A (en) * | 2020-01-20 | 2021-06-01 | 宁德新能源科技有限公司 | Electrode assembly and battery |
| CN114792867A (en) * | 2021-01-26 | 2022-07-26 | 南京泉峰科技有限公司 | Battery pack |
| CN114914606A (en) * | 2022-04-12 | 2022-08-16 | 深圳市华美兴泰科技股份有限公司 | Mounting box, battery pack and assembling method |
| CN116544626A (en) * | 2023-07-03 | 2023-08-04 | 上海瑞浦青创新能源有限公司 | Energy storage device |
| WO2023217246A1 (en) * | 2022-05-12 | 2023-11-16 | 比亚迪股份有限公司 | Battery, battery pack and vehicle |
| WO2024012403A1 (en) * | 2022-07-15 | 2024-01-18 | 比亚迪股份有限公司 | Energy storage battery cabinet and energy storage system having same |
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| CN112821012B (en) * | 2021-03-01 | 2024-03-29 | 厦门海辰新材料科技有限公司 | Tab structure, battery core and battery |
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| WO2024012403A1 (en) * | 2022-07-15 | 2024-01-18 | 比亚迪股份有限公司 | Energy storage battery cabinet and energy storage system having same |
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| Publication number | Publication date |
|---|---|
| WO2020252803A1 (en) | 2020-12-24 |
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