CN114039112B - Battery cell SOC regulating and controlling device and regulating and controlling method thereof - Google Patents
Battery cell SOC regulating and controlling device and regulating and controlling method thereof Download PDFInfo
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- CN114039112B CN114039112B CN202111420852.2A CN202111420852A CN114039112B CN 114039112 B CN114039112 B CN 114039112B CN 202111420852 A CN202111420852 A CN 202111420852A CN 114039112 B CN114039112 B CN 114039112B
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
-
- 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
- H01M50/512—Connection only in parallel
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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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/514—Methods for interconnecting adjacent batteries or cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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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
The invention relates to the technical field of battery production devices, in particular to a battery cell SOC regulating device and a regulating method thereof. The battery cell SOC regulation and control device comprises: the number of the cross beams is two, and the two cross beams are electrically connected; the connecting end, one end of the connecting end is connected with the crossbeam electrically, one end far away from the crossbeam of the connecting end is suitable for being abutted with the positive pole or the negative pole of the battery cell; the same number of connecting ends are connected to each cross beam, and the two cross beams are respectively suitable for being connected with the positive pole posts and the negative pole posts of the multiple electric cores through the connecting ends. According to the battery cell SOC regulating and controlling device, the same number of the plurality of connecting ends are connected to the two cross beams, one end of each connecting end, far away from the cross beam, is abutted against the positive pole or the negative pole of one battery cell, and the two cross beams are electrically connected, so that the plurality of battery cells are connected in parallel, and the voltages of the battery cells in the parallel circuit are the same, namely the SOCs of the battery cells are the same, and the uniform and rapid regulation and control of the SOCs of the battery cells are realized.
Description
Technical Field
The invention relates to the technical field of battery production devices, in particular to a battery cell SOC regulating device and a regulating method thereof.
Background
The battery pack comprises a plurality of battery cells, the capacity of the battery pack is influenced by the capacity of each battery cell and the initial SOC (State of Charge) distribution of the battery cells, when the capacities of all battery cells forming the battery pack are equal, the capacity of the battery pack depends on the maximum value and the minimum value of the initial SOC of the battery cells, namely the distribution width of the SOC, so that under the condition that the capacities of the battery cells are determined, the whole capacity of the battery pack can be improved by narrowing the SOC distribution width of the battery cells when the battery cells are grouped, in the prior art, the SOC of each battery cell is regulated and controlled to be equal by charging or discharging each battery cell to the same cut-off voltage through test equipment, however, the influence of the precision and the stability of the test equipment and the self polarization of the battery cells is limited, the SOC (Open Circuit Voltage ) of each battery cell after the charging/discharging is finished can not be deviated, the SOC of each battery cell is completely equal, the battery cell needs to be subjected to Charge/discharge test one by one, the period is long, a large amount of test resources can be occupied, and the time cost and the test cost is increased.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect of poor SOC consistency of a plurality of battery cells in the prior art, so as to provide the battery cell SOC regulating device capable of simply and rapidly improving the SOC consistency of the plurality of battery cells.
The invention aims to solve the other problem of the prior art that the battery cell SOC regulating method is complex to operate and takes a long time, so that the battery cell SOC regulating method is simple and quick.
In order to solve the technical problems, the invention provides a battery cell SOC regulating device, which comprises:
the number of the cross beams is two, and the two cross beams are electrically connected;
the connecting end, one end of the said connecting end is connected with said crossbeam electrically, one end far away from said crossbeam of the said connecting end is suitable for being in contact with positive pole post or negative pole post of the electric core;
and each cross beam is connected with the same number of connecting ends, and two cross beams are respectively suitable for being connected with the positive pole posts and the negative pole posts of the multiple battery cells through the connecting ends.
Optionally, the connection end includes: the terminal is arranged at one end of the connecting end and is suitable for being abutted with the positive pole or the negative pole of the battery cell.
Optionally, the end surface of the terminal, which is abutted against the battery cell, is an arc-shaped curved surface, and the radius r of the arc-shaped curved surface along the horizontal direction 3 Greater than radius r in the vertical direction 4 。
Optionally, the connection end further includes: the elastic connecting piece, the one end of elastic connecting piece with the terminal is connected, the elastic connecting piece keep away from the one end of terminal with the crossbeam is connected, the elastic connecting piece is suitable for along predetermineeing the direction flexible.
Optionally, the connection end further includes: and the sleeve is sleeved on the elastic connecting piece and is suitable for providing guidance for the expansion and contraction of the elastic connecting piece.
Optionally, the external diameter of sleeve is less than the size of terminal up end, the both ends of sleeve are suitable for respectively with the up end of terminal and the crossbeam butt when the elastic connection piece is compressed, are suitable for the restriction the compression volume of elastic connection piece.
Optionally, a rail is disposed on the beam along the length direction of the beam, and the connection end is adapted to move along the rail.
Optionally, the battery cell SOC regulation device further includes: the voltage collector is suitable for being connected with the two cross beams at the same time and is suitable for displaying the voltage of the battery cell when the two cross beams are respectively connected with the positive pole and the negative pole of the battery cell.
Optionally, the terminal is made of metal.
The invention provides a battery cell SOC regulation and control method, which comprises the following steps:
dividing the capacity of N electric cores;
discharging each cell to a preset voltage;
the two cross beams of the battery cell SOC regulating device are respectively connected with the positive pole and the negative pole of the battery cell through connecting ends;
when the voltage value in the battery cell SOC regulating device reaches stability, the connection between the battery cell SOC regulating device and the battery cell is disconnected. The technical scheme of the invention has the following advantages:
1. according to the battery cell SOC regulation and control device provided by the invention, the same number of the plurality of connecting ends are connected to the two cross beams, one end of each connecting end far away from the cross beam is suitable for being abutted against the positive pole or the negative pole of one battery cell, so that the two cross beams are respectively connected with the positive pole and the negative pole of a plurality of battery cells through the connecting ends, and the two cross beams are electrically connected, so that the plurality of battery cells are connected in parallel, and therefore, the current flows from the battery cells with high voltage to the battery cells with low voltage to the battery cells with the same voltage in the whole parallel circuit, namely, the SOC of each battery cell reaches the same voltage, the whole process consumes a short time, the uniform and rapid regulation and control of the SOC of the battery cells are realized, the consistency of the battery cells is ensured, the battery cell SOC is simple in structure and convenient to operate, extra charge and discharge equipment is not needed, the test resources and the test time are saved, and the cost is effectively reduced.
2. According to the battery cell SOC regulating device, the terminal is arranged at one end of the connecting end, the connecting end is abutted with the pole of the battery cell through the terminal, the end face of the terminal abutted with the battery cell is arranged into the arc-shaped curved surface, and the contact stability of the terminal and the pole of the battery cell is improved while the contact of the terminal and the pole of the battery cell is ensured.
3. According to the battery cell SOC regulation and control device, the connecting end comprises the elastic connecting piece, one end of the elastic connecting piece is connected with the terminal, the other end of the elastic connecting piece is connected with the cross beam, the terminal and the cross beam are connected, the elastic connecting piece is suitable for stretching along the preset direction, the length can be adjusted according to actual conditions, each terminal can be enabled to be abutted against the pole of the battery cell, good contact is guaranteed, and accuracy of a regulation and control result is guaranteed.
4. According to the battery cell SOC regulation and control device, the sleeve is sleeved on the elastic connecting piece, the elastic connecting piece is limited to be positioned in the sleeve and stretch along the axial direction of the sleeve, the strength and stability of the structure are enhanced, meanwhile, the limiting of the sleeve by the terminal is realized through the fact that the outer diameter of the sleeve is smaller than the size of the upper end face of the terminal, when the elastic connecting piece is compressed, the cross beam moves towards the terminal, and when the elastic connecting piece is compressed to a certain amount, the two ends of the sleeve are respectively abutted against the cross beam and the terminal, so that the elastic connecting piece is limited to be further compressed, and the situation that the elastic connecting piece is unstable due to excessive compression is avoided.
5. According to the battery cell SOC regulating and controlling device, the rails along the length direction of the cross beam are arranged on the cross beam, so that the connecting end moves along the length direction of the cross beam, and the position of the connecting end is regulated according to different distances between the battery cells, so that good contact between the connecting end and the terminal post of the battery cell is ensured.
6. According to the battery cell SOC regulation and control device, the voltage collector is arranged and simultaneously connected with the two cross beams, so that the electric connection between the two cross beams is realized, the parallel connection between a plurality of battery cells connected with the cross beams is further realized, the voltage collector can also read the voltage values of the battery cells, and whether the voltage values of the plurality of battery cells connected in parallel reach stability is monitored.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a plurality of cell arrangements according to the present invention;
FIG. 2 is a schematic diagram of a cell SOC control device according to the present invention;
FIG. 3 is a schematic diagram of a connection of the battery cell SOC regulation device of the present invention to a plurality of battery cells;
FIG. 4 is a schematic view of the structure of the connecting end of the present invention;
FIG. 5 is a schematic view of the elastic connector of the present invention;
FIG. 6 is a schematic view of a sleeve structure according to the present invention;
FIG. 7 is a schematic view of a terminal structure according to the present invention;
fig. 8 is a circuit diagram of the SOC regulation principle of the cell of the present invention.
Reference numerals illustrate:
1. a battery cell; 11. a positive electrode post; 12. a negative electrode column; 2. a connection end; 3. an elastic connection member; 4. a terminal; 5. a sleeve; 6. a cross beam; 7. a voltage collector.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
Referring to fig. 1 to 8, the apparatus for regulating and controlling SOC of a battery cell according to this embodiment includes:
the number of the cross beams 6 is two, and the two cross beams 6 are electrically connected;
the connecting end 2 is electrically connected with the cross beam 6, and one end of the connecting end 2 far away from the cross beam 6 is suitable for being abutted against the positive pole 11 or the negative pole 12 of the battery cell 1;
each cross beam 6 is connected with the same number of connecting ends 2, and two cross beams 6 are respectively suitable for being connected with positive pole columns 11 and negative pole columns 12 of a plurality of battery cells 1 through the connecting ends 2.
It should be noted that, the battery pack is composed of a plurality of battery cells, the capacity of the battery pack is equal to the sum of the minimum value of the charge capacities of all battery cells and the minimum value of the discharge capacities of all battery cells, when the capacities of all battery cells composing the battery pack are equal, the capacity of the battery pack depends on the maximum value and the minimum value of the SOC of the battery cells, that is, the distribution width of the SOC, so that, in order to ensure the maximization of the battery pack capacity, the SOC of each battery cell in the battery pack should be regulated to be equal.
It should be noted that, when the SOC regulation is needed to be performed on N electrical cores 1, N electrical cores 1 are arranged in a word, N electrical cores 1 are arranged on the same side, the cathode columns are arranged on the same side, the arrangement mode is as shown in fig. 1, two electrical cores 1 are connected with N electrical cores 2 on the cross beam 6 respectively, N electrical cores 1 connected on one cross beam 6 are connected with N electrical cores 1 in a one-to-one correspondence manner respectively, N electrical cores 2 connected on the other cross beam 6 are connected with N electrical cores 1 in a one-to-one correspondence manner respectively, further, two electrical cores 6 are electrically connected, thereby realizing that N electrical cores 1 are connected in parallel, and in combination with fig. 8, N electrical cores 1 are connected in parallel in the same circuit, the electrical cores with high voltage are automatically charged as electrical cores with low voltage, at the moment, N electrical cores 1 are all equal in voltage, N electrical cores 1 are in the same SOC, the SOC is measured with the same voltage, the SOC is reduced in the time of the constant voltage and the SOC, and the time is shortened to the time of the constant-current charging and discharging time is shortened.
According to the battery cell SOC regulation and control device provided by the embodiment, the same number of the plurality of connecting ends 2 are connected to the two cross beams 6, one end, away from the cross beams 6, of each connecting end 2 is suitable for being abutted to the positive pole 11 or the negative pole 12 of one battery cell 1, the two cross beams 6 are respectively connected with the positive pole 11 and the negative pole 12 of the plurality of battery cells 1 through the connecting ends 2, the two cross beams 6 are electrically connected, the plurality of battery cells 1 are connected in parallel, and therefore the voltage of each battery cell 1 in the whole parallel circuit reaches the same, namely the SOC of each battery cell reaches the same, the whole process time is short, the uniformity of the SOC of the plurality of battery cells is realized, the consistency of the plurality of battery cells is ensured, the structure is simple, the operation is convenient, extra charge and discharge equipment is not needed, the testing resources are saved, the testing time is effectively reduced, and the cost is effectively reduced.
Specifically, the connection terminal 2 includes: the terminal 4 is provided at one end of the connection terminal 2, and is adapted to contact with the positive electrode 11 or the negative electrode 12 of the battery cell 1.
Specifically, the end surface of the terminal 4 abutting against the electric core 1 is an arc-shaped curved surface, and the radius r of the arc-shaped curved surface along the horizontal direction 3 Greater than radius r in the vertical direction 4 。
Optionally, the curved surface is a sphere or an ellipsoid, and preferably an ellipsoid.
Referring to fig. 7, the upper end surface of the terminal 4 is a plane, the lower end surface is an arc-shaped curved surface, and the radius r of the arc-shaped curved surface along the horizontal direction 3 Greater than radius r in the vertical direction 4 Is beneficial to enhancing the stability of the end face, wherein, 0 < r 4 ＜r 3 ，r 3 Preferably 20mm, r 4 Preferably 5mm; the upper end face refers to the end face in the "upper" direction indicated by the arrow in FIG. 7, and the lower end face refers to the end face in FIG. 7The end face in the "down" direction indicated by the arrow, the horizontal direction indicated by the arrow in fig. 7, and the vertical direction indicated by the arrow in fig. 7.
According to the battery cell SOC regulation and control device provided by the embodiment, the terminal 4 is arranged at one end of the connecting end 2, the connecting end 2 is in butt joint with the pole of the battery cell 1 through the terminal 4, the terminal 4 is in butt joint with the pole of the battery cell 1, the end face of the terminal 4, which is in butt joint with the battery cell 1, is arranged to be an arc-shaped curved surface, and the contact stability is improved while the terminal 4 is in contact with the pole of the battery cell 1.
Specifically, the connection terminal 2 further includes: and an elastic connecting piece 3, wherein one end of the elastic connecting piece 3 is connected with the terminal 4, one end of the elastic connecting piece 3 away from the terminal 4 is connected with the cross beam 6, and the elastic connecting piece 3 is suitable for stretching along a preset direction.
The preset direction refers to a direction perpendicular to the upper surface of the terminal 4, and the elastic connection member 3 may adjust the distance between the terminal 4 and the cross beam 6 by extending and retracting along the preset direction.
Optionally, the elastic connection member 3 is a spring.
Referring to fig. 5, the length of the elastic connecting member 3 is L 1 Wherein L is 1 > 0, preferably 20mm.
It should be noted that, due to the problems of the manufacturing process and the like, the plurality of the electric cores 1 may have a phenomenon of incomplete consistency, when the plurality of electric cores 1 are placed on the same plane, the pole post surfaces of the plurality of electric cores 1 may not be on the same plane, at this time, the elastic connection member 3 may stretch according to the actual situation, and adjust the length according to the actual situation, so as to ensure that each terminal 4 can be abutted to the pole post of the electric core 1.
According to the battery cell SOC regulation and control device, the connecting end 2 comprises the elastic connecting piece 3, one end of the elastic connecting piece 3 is connected with the terminal 4, the other end of the elastic connecting piece is connected with the cross beam 6, connection of the terminal 4 and the cross beam 6 is achieved, the elastic connecting piece 3 is suitable for stretching along the preset direction, adjustment of the length can be carried out according to actual conditions, each terminal can be guaranteed to be in contact with the pole of the battery cell, accordingly good contact is guaranteed, and accuracy of regulation and control results is guaranteed.
Specifically, the connection terminal 2 further includes: and the sleeve 5 is sleeved on the elastic connecting piece 3 and is suitable for providing guidance for the expansion and contraction of the elastic connecting piece 3.
Referring to fig. 6, the sleeve 5 has a height L 2 Wherein 0 < L 2 ＜L 1 Preferably 10mm; the outer diameter of the sleeve 5 is r 2 An inner diameter r 1 Wherein r is 0 < r 1 ＜r 2 ，r 1 Preferably 15mm, r 2 Preferably 20mm.
Specifically, the outer diameter of the sleeve 5 is smaller than the size of the upper end face of the terminal 4, and two ends of the sleeve 5 are adapted to abut against the upper end face of the terminal 4 and the cross beam 6 when the elastic connector 3 is compressed, so as to limit the compression amount of the elastic connector 3.
The radius of the upper end face of the terminal 4 is r 3 R is then 2 ＜r 3 The method comprises the steps of carrying out a first treatment on the surface of the The two ends of the sleeve refer to the upper and lower ends of the sleeve, which refer to the "upper" and "lower" arrows in fig. 6.
According to the battery cell SOC regulation and control device provided by the embodiment, the sleeve 5 is sleeved on the elastic connecting piece 3, the elastic connecting piece 3 is limited to be positioned in the sleeve 5 and stretches along the axial direction of the sleeve 5, so that the strength and stability of a structure are enhanced, meanwhile, the limit of the terminal 4 to the sleeve 5 is realized by setting that the outer diameter of the sleeve 5 is smaller than the size of the upper end face of the terminal 4, when the elastic connecting piece 3 is compressed, the cross beam 6 moves towards the terminal 4, when the elastic connecting piece 3 is compressed to a certain amount, the two ends of the sleeve 5 are respectively abutted against the cross beam 6 and the terminal 4, so that the elastic connecting piece 3 is limited to be further compressed, and the elastic connecting piece 3 is prevented from being unstable due to excessive compression.
In particular, the cross member 6 is provided with a track along the length of the cross member 6 along which the connection end 2 is adapted to move.
The longitudinal direction refers to the longitudinal direction indicated by the arrow in fig. 2.
According to the battery cell SOC regulation and control device provided by the embodiment, the rails along the length direction of the cross beam 6 are arranged on the cross beam 6, so that the connecting end 2 moves along the length direction of the cross beam 6, and the position of the connecting end 2 is adjusted according to the difference of the distances between the battery cells 1, so that the connecting end 2 is ensured to be in good contact with the poles of the battery cells 1.
Specifically, the cell SOC regulation device further includes: the voltage collector 7 is suitable for simultaneously connecting the two cross beams 6, and is suitable for displaying the voltage of the battery cell 1 when the two cross beams 6 are respectively connected with the positive pole 11 and the negative pole 12 of the battery cell 1.
According to the battery cell SOC regulation and control device, the voltage collector 7 is arranged to be connected with the two cross beams 6 at the same time, so that electric connection between the two cross beams 6 is achieved, parallel connection between the plurality of battery cells 1 connected with the cross beams 6 is achieved, the voltage collector 7 can also read the voltage value of the battery cells 1, and whether the voltage value of the plurality of battery cells 1 connected in parallel is stable or not is monitored.
Specifically, the material of the terminal 4 is metal, including copper and stainless steel.
Optionally, the material of the terminal 4 is copper, aluminum or stainless steel.
Optionally, the material of the elastic connecting piece 3 is a good conductor.
Optionally, the elastic connecting piece 3 is made of copper, aluminum or stainless steel.
Optionally, the sleeve 5 is made of a material with a hard structure, including steel or hard plastic.
Example two
The method for regulating and controlling the SOC of the battery cell provided by the embodiment comprises the following steps:
dividing the capacity of N electric cores;
discharging each cell to a preset voltage;
the two cross beams of the battery cell SOC regulating device are respectively connected with the positive pole and the negative pole of the battery cell through connecting ends;
when the voltage value in the battery cell SOC regulating device reaches stability, the connection between the battery cell SOC regulating device and the battery cell is disconnected.
Optionally, when the voltage value in the battery cell SOC regulation device reaches stability, the connection between the two cross beams of the battery cell SOC regulation device and the battery cell via the connection end and the positive pole and the negative pole of the battery cell respectively, the disconnection of the connection between the battery cell SOC regulation device and the battery cell further includes:
and reading the voltage value in the battery cell SOC regulating device.
The voltage value is the voltage of the N parallel circuits of the battery cells, and the voltage collector 7 is connected with the two cross beams 6 of the SOC regulation and control device for reading the voltage value.
The following describes in detail the steps of using the cell SOC control device:
firstly, carrying out capacity division on N electric cores 1 needing to regulate and control the SOC, and discharging each electric core 1 to voltage V1 after capacity division, wherein the value of V1 is determined by the characteristics of an electric core system, the electric core in the embodiment is an NMC ternary electric core, and the electric core is discharged to 3.55V after capacity division, and the fact that the actual voltage of the electric core floats up and down at 3.55V due to the problems of stability, precision and the like of charging and discharging equipment is required;
then, arranging N electric cores 1 in a straight line, wherein positive pole columns of the N electric cores 1 are positioned on the same side, negative pole columns are positioned on the same side, the arrangement mode is as shown in fig. 1, the electric core SOC regulating device is connected with the electric cores 1, terminals 4 of the connecting ends 2 are in one-to-one corresponding abutting connection with the pole columns of the electric cores, positive pole columns 11 of the N electric cores 1 are connected with one cross beam 6 through the N connecting ends 2, negative pole columns 12 of the N electric cores 1 are connected with the other cross beam 6 through the N connecting ends 2, and the two cross beams 6 are simultaneously connected with the voltage collector 7 to realize parallel connection of the N electric cores;
then, the voltage value displayed by the voltage collector 7 is read, the connection between the battery cell SOC regulating device and the battery cell 1 is disconnected after the voltage value is stable, and in this embodiment, the voltages of all the battery cells 1 are finally stabilized at 3.553V, so that the SOC regulation of N battery cells 1 is completed, and the SOCs of N battery cells 1 are consistent.
The battery cell SOC regulating and controlling device provided by the embodiment is suitable for battery cell systems with various configurations such as square battery cells, cylindrical battery cells, soft package battery cells and the like.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (8)
1. The utility model provides a battery cell SOC regulation and control device which characterized in that includes:
the number of the cross beams (6) is two, and the two cross beams (6) are electrically connected;
the connecting end (2), one end of the connecting end (2) is electrically connected with the cross beam (6), and one end of the connecting end (2) far away from the cross beam (6) is suitable for being abutted against a positive pole (11) or a negative pole (12) of the battery cell (1);
each cross beam (6) is connected with a plurality of connecting ends (2) with the same number, and the two cross beams (6) are respectively suitable for being connected with positive pole columns (11) and negative pole columns (12) of a plurality of battery cells (1) through the connecting ends (2);
the cross beam (6) is provided with a track along the length direction of the cross beam (6), and the connecting end (2) is suitable for moving along the track;
and the voltage collector (7) is suitable for being connected with the two cross beams (6) at the same time, and is suitable for displaying the voltage of the battery cell (1) when the two cross beams (6) are respectively connected with the positive pole (11) and the negative pole (12) of the battery cell (1).
2. The cell SOC regulation device of claim 1, wherein the connection terminal (2) comprises: and a terminal (4) which is provided at one end of the connection end (2) and is adapted to be in contact with the positive electrode post (11) or the negative electrode post (12) of the battery cell (1).
3. The cell SOC control device according to claim 2, wherein an end face of the terminal (4) abutting against the cell (1) is provided as an arc-shaped curved surface having a radius r in a horizontal direction 3 Greater than radius r in the vertical direction 4 。
4. The cell SOC regulation device of claim 2, wherein the connection terminal (2) further comprises: the elastic connecting piece (3), the one end of elastic connecting piece (3) with terminal (4) are connected, the one end that elastic connecting piece (3) kept away from terminal (4) with crossbeam (6) are connected, elastic connecting piece (3) are suitable for and stretch out and draw back along predetermineeing the direction.
5. The cell SOC regulation device of claim 4 wherein the connection terminal (2) further comprises: and the sleeve (5) is sleeved on the elastic connecting piece (3) and is suitable for providing guidance for the expansion and contraction of the elastic connecting piece (3).
6. The battery cell SOC regulation and control device according to claim 5, wherein the outer diameter of the sleeve (5) is smaller than the size of the upper end face of the terminal (4), and both ends of the sleeve (5) are adapted to abut against the upper end face of the terminal (4) and the cross beam (6) respectively when the elastic connecting member (3) is compressed, and are adapted to limit the compression amount of the elastic connecting member (3).
7. The battery cell SOC control device according to claim 2, wherein the terminal (4) is made of metal.
8. The battery cell SOC regulation and control method is characterized by comprising the following steps:
dividing the capacity of N electric cores;
discharging each cell to a preset voltage;
connecting the two cross beams of the battery cell SOC regulating device according to any one of the claims 1-7 with the positive pole and the negative pole of the battery cell through connecting ends respectively;
when the voltage value in the battery cell SOC regulating device reaches stability, the connection between the battery cell SOC regulating device and the battery cell is disconnected.
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