CN114614122B - Battery difference monitoring and adjusting system and monitoring and adjusting method - Google Patents
Battery difference monitoring and adjusting system and monitoring and adjusting method Download PDFInfo
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- CN114614122B CN114614122B CN202210508531.6A CN202210508531A CN114614122B CN 114614122 B CN114614122 B CN 114614122B CN 202210508531 A CN202210508531 A CN 202210508531A CN 114614122 B CN114614122 B CN 114614122B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 170
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000007791 liquid phase Substances 0.000 claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 34
- 230000005501 phase interface Effects 0.000 claims abstract description 34
- 230000001105 regulatory effect Effects 0.000 claims description 20
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 6
- 239000003792 electrolyte Substances 0.000 claims description 3
- 239000012266 salt solution Substances 0.000 claims description 3
- 229920002545 silicone oil Polymers 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 239000012780 transparent material Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 4
- 230000009471 action Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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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
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Secondary Cells (AREA)
Abstract
The application relates to a battery difference monitoring and adjusting system and a monitoring and adjusting method, and relates to the field of power supply adjustment and control. This battery difference monitors and adjusts system's conductive liquid and non-conductive liquid between form the liquid phase interface, monitoring unit is connected with a plurality of battery cells of group battery, so that the monitoring laser to the process is refracted after the liquid phase interface takes place to be out of shape, whether the control unit needs to carry out the difference adjustment between the biggest two battery cells of capacity difference according to the position signal of the monitoring laser that laser receiving assembly received, and combine the position signal of monitoring laser and a plurality of battery cells respectively with the position information of the tie point of monitoring unit confirm the biggest two battery cells of capacity difference, in order to carry out the difference adjustment to corresponding two battery cells. The application provides a battery difference monitoring governing system can be fast accurate find the most obvious battery or batteries of difference in the group battery, guarantees the normal work and the life of group battery.
Description
Technical Field
The present disclosure relates to power supply regulation and control, and more particularly, to a battery difference monitoring and regulating system and a monitoring and regulating method.
Background
At present, because the voltage of a single battery is usually lower than the required voltage of operation, so the battery is often connected in series to form a battery pack for use, but because the manufacturing of single batteries is slightly different, and irregular charging and discharging under various operating conditions cause that the usable time of the single batteries in the battery pack is different, the normal operation and the service life of the whole battery pack are influenced, and therefore the difference condition of the single batteries in the battery pack needs to be monitored and adjusted urgently.
In the related art, the difference of the single batteries in the battery pack is mainly determined by measuring the operation parameters of the batteries, such as voltage, current, temperature and operation time, but the method cannot quickly and accurately find one or more batteries with the most obvious difference, and has low efficiency; in addition, the conventional method usually only discharges the battery with the largest monomer residual capacity, so that the energy of the battery pack is wasted, the energy of the battery cannot be fully utilized, and the running performance of the whole energy storage system is seriously influenced by the heat converted from the released electric quantity.
Disclosure of Invention
The embodiment of the application provides a battery difference monitoring and adjusting system and a monitoring and adjusting method, and aims to solve the problem that the normal work and the service life of the whole battery pack are influenced because one or more batteries with the most obvious difference in the battery pack cannot be found quickly and accurately in the related technology.
In a first aspect, a battery differential monitoring and adjusting system is provided, which includes:
a first monitoring unit including a laser emitting component and a laser receiving component for receiving monitoring laser emitted by the laser emitting component;
the second monitoring unit is arranged between the laser emitting assembly and the laser receiving assembly and comprises a hollow cavity, conductive liquid and non-conductive liquid are filled in the hollow cavity from left to right, a liquid phase interface is formed between the conductive liquid and the non-conductive liquid, one end, close to the laser emitting assembly, of the monitoring unit is respectively used for being connected with a plurality of single batteries of a battery pack so as to apply electric potential corresponding to the high-voltage ends of the single batteries to the inner wall of the hollow cavity, and the monitoring laser passing through the liquid phase interface is refracted after the liquid phase interface deforms;
and the control unit is used for judging whether the two single batteries with the largest capacity difference need to be subjected to difference adjustment according to the position signal of the monitoring laser penetrating through the liquid phase interface and received by the laser receiving assembly, and determining the two single batteries with the largest capacity difference by combining the position signal of the monitoring laser and the position information of the connection points of the plurality of single batteries and the corresponding ends of the monitoring unit respectively so as to perform difference adjustment on the two corresponding single batteries.
In some embodiments, the second monitoring unit is a hollow cylinder structure, and a plurality of electrode plates arranged at intervals are arranged at one end of the second monitoring unit close to the laser emission assembly along the circumferential direction of the second monitoring unit, each electrode plate is used for being connected with a corresponding single battery, and the electrode plates are used for applying a potential corresponding to the high-voltage end of the single battery to the inner wall of the hollow cavity so as to change the shape of the liquid phase interface.
In some embodiments, the laser receiving assembly comprises:
one end of the receiving target head, which is close to the second monitoring unit, comprises a safety area and an early warning area which are arranged from inside to outside;
and the transmission piece is used for judging whether the monitoring laser received by the receiving target head is positioned in the safety area and the early warning area or not, and sending a corresponding position signal to the control unit after judging that the monitoring laser is positioned in the safety area or the early warning area.
In some embodiments, the battery pack further includes a regulating unit, the regulating unit includes a plurality of connection circuits, the plurality of connection circuits are used to connect each of the single batteries with the remaining single batteries, and each of the connection circuits is provided with a selection switch, the selection switch is used to be turned on or turned off under the control of the control unit, so as to connect two single batteries to be regulated to form a charging and discharging loop, so as to perform differential regulation.
In some embodiments, the protection device further comprises a protection unit, the protection unit comprises an integration board and a plurality of monitoring switches arranged on the integration board at intervals, each monitoring switch is used for being connected with a high-voltage end of a corresponding one of the single batteries and also connected with a corresponding one of the electrode plates, and the monitoring switches are used for being opened or closed under the control of the control unit so as to communicate each electrode plate with the corresponding single battery.
In some embodiments, each of the monitoring switches further has a protection element for protecting the corresponding battery cell.
In some embodiments, the conductive liquid is a sodium chloride electrolyte salt solution and has a refractive index of 1.3, and the non-conductive liquid is a non-conductive silicone oil and has a refractive index of 1.65.
In some embodiments, the monitoring laser emitted by the laser emitting component has a color, and the second monitoring unit is made of a transparent material.
In a second aspect, a battery difference monitoring and adjusting method is provided, which is implemented by using the above battery difference monitoring and adjusting system, and includes the steps of:
s1, respectively connecting a plurality of single batteries of a battery pack with one end of a monitoring unit close to a laser emission assembly so as to apply potential corresponding to the high-voltage end of each single battery to the inner wall of a hollow cavity, so that a liquid phase interface is deformed;
s2, judging whether difference adjustment is needed between the two single batteries with the largest capacity difference according to the received position signal of the monitoring laser penetrating through the liquid phase interface;
s3, if not, continuously judging whether difference adjustment is needed between the two single batteries with the largest corresponding capacity difference according to the received position signal of the next beam of monitoring laser, if so, determining the two single batteries with the largest capacity difference by combining the position signal of the monitoring laser and the position information of the connection points of the multiple single batteries and the corresponding ends of the monitoring unit respectively, disconnecting the multiple single batteries from the monitoring unit, and performing difference adjustment on the two corresponding single batteries;
s4, repeating the steps S1-S3.
In some embodiments, if difference adjustment is required to be performed between two of the single batteries with the largest difference, it is determined whether an actual capacity difference value of the two single batteries is greater than a maximum capacity difference value, and if so, both of the two corresponding single batteries are disconnected from the monitoring unit, and the two corresponding single batteries are isolated from the other single batteries.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a battery difference monitoring and adjusting system, as the conducting liquid and the non-conducting liquid are filled in the hollow cavity from left to right, a liquid phase interface is formed between the conducting liquid and the non-conducting liquid, and one end of the monitoring unit close to the laser emission component is respectively connected with a plurality of single batteries of the battery pack, so that the monitoring laser emitted by the laser emitting component is refracted after passing through the deformed liquid phase interface, and finally the control unit judges whether the difference adjustment is needed between the two single batteries with the largest capacity difference according to the position signal of the monitoring laser which passes through the liquid phase interface and is received by the laser receiving component, and determining two single batteries with the largest capacity difference by combining the position signal of the monitoring laser and the position information of the connection points of the plurality of single batteries and the corresponding ends of the monitoring unit respectively so as to perform difference adjustment on the two corresponding single batteries. Therefore, the battery difference monitoring and adjusting system can rapidly find the most obvious single battery in the whole battery pack by amplifying the small difference between the single batteries, thereby realizing continuous monitoring and adjustment of the battery pack, pointedly reducing the difference of the most obvious battery, accelerating the equalizing speed between the single batteries, improving the service efficiency and the service life of the battery pack, and ensuring the long-term effective power supply operation of the battery pack.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a battery differential monitoring and regulating system provided in an embodiment of the present application;
fig. 2 is a flowchart of a battery difference monitoring and adjusting method according to an embodiment of the present disclosure.
In the figure: 1-a first monitoring unit, 10-a laser emitting assembly, 11-a laser receiving assembly, 110-a receiving target head, 111-a safety area, 112-an early warning area, 113-a transmission piece, 2-a second monitoring unit, 20-conductive liquid, 21-non-conductive liquid, 22-a liquid phase interface, 23-an electrode plate, 3-a single battery, 4-a control unit, 5-a regulating unit, 50-a selection switch, 6-a protection unit, 60-an integrated board, 61-a monitoring switch and 62-a protection element.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.
The embodiment of the application provides a battery difference monitoring and adjusting system, which can solve the problem that the normal work and the service life of the whole battery pack are influenced because one or more batteries with most obvious differences in the battery pack cannot be found quickly and accurately in the related technology.
Referring to fig. 1, the battery difference monitoring and adjusting system mainly includes a first monitoring unit 1, a second monitoring unit 2 and a control unit 4, wherein the first monitoring unit 1 includes a laser emitting assembly 10 and a laser receiving assembly 11 for receiving monitoring laser emitted by the laser emitting assembly 10, and the second monitoring unit 2 is disposed between the laser emitting assembly 10 and the laser receiving assembly 11; the second monitoring unit 2 comprises a hollow cavity, conductive liquid 20 and non-conductive liquid 21 are filled in the hollow cavity from left to right, a liquid phase interface 22 is formed between the conductive liquid 20 and the non-conductive liquid 21, one end of the monitoring unit 2, which is close to the laser emission assembly 10, is respectively used for being connected with the plurality of single batteries 3 of the battery pack, so that electric potential corresponding to the high-voltage end of each single battery 3 is applied to the inner wall of the hollow cavity, and the monitoring laser passing through the liquid phase interface 22 is refracted after the liquid phase interface 22 deforms; the control unit 4 is configured to determine whether difference adjustment needs to be performed between the two single batteries 3 with the largest capacity difference according to the position signal of the monitoring laser that passes through the liquid phase interface 22 and is received by the laser receiving assembly 11, and determine the two single batteries 3 with the largest capacity difference by combining the position signal of the monitoring laser and the position information of the connection points at the ends of the multiple single batteries 3 corresponding to the monitoring unit 2, so as to perform difference adjustment on the two corresponding single batteries 3.
The battery difference monitoring and adjusting system is characterized in that the conducting liquid 20 and the non-conducting liquid 21 are filled in the hollow cavity from left to right, so that a liquid phase interface 22 is formed between the conducting liquid 20 and the non-conducting liquid 21, and one end of the monitoring unit close to the laser emission component 10 is respectively connected with a plurality of single batteries 3 of the battery pack, so that the monitoring laser emitted by the laser emitting component 10 is refracted after passing through the deformed liquid phase interface 22, finally the control unit 4 judges whether the difference adjustment is needed between the two single batteries 3 with the largest capacity difference according to the position signal of the monitoring laser which is received by the laser receiving component 11 and passes through the liquid phase interface 22, and determining two single batteries 3 with the largest capacity difference by combining the position signal of the monitoring laser and the position information of the connection points of the plurality of single batteries 3 and the corresponding ends of the monitoring unit respectively so as to perform difference adjustment on the two corresponding single batteries 3. Therefore, the battery difference monitoring and adjusting system can rapidly find the most obvious single battery 3 in the whole battery pack by amplifying the small difference between the single batteries 3, thereby realizing continuous monitoring and adjustment of the battery pack, pertinently reducing the difference of the most obvious battery, accelerating the equalizing speed between the single batteries 3, improving the service efficiency and the service life of the battery pack, and ensuring the long-term effective power supply operation of the battery pack.
Specifically, since all the single cells 3 are respectively connected to the end of the monitoring unit 2 close to the laser emitting assembly 10, the potentials at different places of the inner wall of the hollow cavity are different, which may cause the contact angle between the liquid phase interface 22 and the inner wall surface of the hollow cavity to change, that is, the shape of the liquid phase interface 22 may change randomly, and after the shape of the liquid phase interface 22 changes, the monitoring laser emitted by the laser emitting assembly 10 may be refracted when passing through the liquid phase interface 22, so that the position of the monitoring laser that should originally fall on the center of the laser receiving assembly 11 may shift, and at this time, the difference between the current multiple single cells 3 may be analyzed according to the current position information of the monitoring laser.
Specifically, in actual monitoring, the position of the monitoring laser obtained by each monitoring basically deviates, and therefore, it is first necessary to determine whether difference adjustment needs to be performed on the two single batteries 3 with the largest current capacity difference according to the deviation amount, if the difference between the two single batteries 3 with the largest current capacity difference is small and belongs to a receivable range, difference adjustment is not performed on the two single batteries 3, and if the difference is too large, the service efficiency and the service life of the battery pack are affected, difference adjustment needs to be performed, so after it is determined that difference adjustment needs to be performed, it is also necessary to determine the two single batteries 3 with the largest capacity difference, and here, the same is also obtained according to the position information of the currently received monitoring laser. If the monitoring laser falls on the upper right of the laser receiving assembly 11, next, a connection point at one end of the monitoring unit 2, which is closest to the laser emitting assembly 10, and another connection point which is diagonally symmetrical to the connection point are determined, two single batteries 3 connected with the two connection points are two single batteries 3 with the largest capacity difference in the current monitoring, and then the two corresponding single batteries 3 are subjected to difference adjustment under the control of the control unit 4, so that the de-differentiation between the corresponding single batteries 3 is realized.
Furthermore, the second monitoring unit 2 is of a hollow cylindrical structure, a plurality of electrode plates 23 arranged at intervals are arranged at one end, close to the laser emission assembly 10, of the second monitoring unit 2 along the circumferential direction of the second monitoring unit, each electrode plate 23 is used for being connected with a corresponding single battery 3, and the electrode plates 23 are used for applying the electric potential of the high-voltage end of the corresponding single battery 3 to the inner wall of the hollow cavity so as to change the shape of the liquid phase interface 22.
Specifically, the position of the monitoring laser corresponds to the connection point of the corresponding end of each cell 3 and the monitoring unit 2, in order to determine the connection point corresponding to the position more accurately, and also in order to load the potential of each cell 3 on the inner wall of the hollow cavity, therefore, a plurality of electrode plates 23 arranged at intervals are arranged along the circumferential direction of one end of the second monitoring unit 2 close to the laser emission assembly 10, each electrode plate 23 is used for being connected with one corresponding cell 3, and the electrode plates 23 are used for applying the potential of the high-voltage end of the corresponding cell 3 to the inner wall of the hollow cavity to change the contact angle between the liquid and the inner wall of the hollow cavity, thereby changing the shape of the liquid interface 22. In order to better match the position of the monitoring laser with the position of the electrode plate 23, the second monitoring unit 2 has a hollow cylindrical structure, the end of which is naturally circular, and the receiving end of the laser receiving unit 11 is also circular.
Further, the laser receiving assembly 11 mainly includes a receiving target head 110 and a transmission member 113, one end of the receiving target head 110 close to the second monitoring unit 2 includes a safety area 111 and an early warning area 112, the transmission member 113 is used for judging whether the monitoring laser received by the receiving target head 110 is located in the safety area 111 and the early warning area 112, and is used for sending a corresponding position signal to the control unit 4 after judging whether the monitoring laser is located in the safety area 111 or the early warning area 112.
Specifically, the safety region 111 is circular and located at the center of the laser receiver assembly 11, and if the shape of the liquid-phase interface 22 is not deformed, the monitoring laser emitted by the laser emitter assembly 10 will just fall at the center of the safety region 111 of the laser receiver assembly 11. The safety zone 111 has a certain area, and the area of the safety zone 111 is defined according to the acceptable capacity difference between the two single batteries 3, that is, in the monitoring process, if the monitoring laser falls within the safety zone 111, it indicates that the current capacity difference value between the two single batteries 3 with the largest capacity difference is within an acceptable range without adjustment. The early warning area 112 is located at the periphery of the safety area 111, and is annular, and if the monitoring laser falls in the early warning area 112, it indicates that the value of the capacity difference between the two single batteries 3 with the largest capacity difference is larger at this time, and it is necessary to perform difference adjustment, so that the transmission member 113 sends a corresponding position signal to the control unit 4, and determines the electrode sheet 23 at the corresponding position and the single battery 3 connected to the electrode sheet 23 according to the position signal of the current monitoring laser, so as to determine the two single batteries 3 that need to be adjusted, and finally performs adjustment.
Further, this battery difference monitoring governing system still includes the regulating unit 5, and the regulating unit 5 mainly includes many connecting circuit, and many connecting circuit are used for all communicateing each battery cell 3 with remaining battery cell 3 respectively, and all are equipped with select switch 50 on each connecting circuit, and select switch 50 is used for opening or closing under the control of control unit 4 to two battery cell 3 intercommunications that will carry out the adjustment form charge-discharge circuit, in order to carry out the difference adjustment.
Specifically, the adjusting unit 5 is mainly used for adjusting the difference of two single batteries 3 with large difference in monitoring, wherein each single battery 3 is connected with the remaining single batteries 3 through an independent connection circuit, after determining the two single batteries 3 which need to be adjusted currently, the control unit 4 can open the selector switch 50 on the corresponding connection circuit, so that the two corresponding single batteries 3 are communicated to form a connection loop, so that charging and discharging are performed between the corresponding single batteries 3, and the differentiation removal between the batteries is realized. In the adjusting unit 5, a temporary energy conversion loop is constructed by an inductor and a capacitor, so that the surplus electric quantity in the single battery 3 with large capacity is transferred to the single battery 3 with small capacity.
Furthermore, this battery difference monitoring governing system still includes protection unit 6, and protection unit 6 includes that integrated board 60 and a plurality of interval locate the monitoring switch 61 on integrated board 60, and each monitoring switch 61 all is used for linking to each other with one of them battery 3's that corresponds high-voltage end, and still all links to each other with one of them electrode slice 23 that corresponds, and monitoring switch 61 is used for opening or closing under the control of control unit 4 to communicate each electrode slice 23 with the corresponding battery 3. In addition, each monitoring switch 61 is further provided with a protection element 62 for protecting the corresponding single battery 3, and the protection element 62 serves as a current limiting element and mainly functions to prevent the single battery 3 from being damaged by accidental short circuit events.
Further, the conductive liquid 20 is specifically a sodium chloride electrolyte salt solution, and has a refractive index of 1.3, and the non-conductive liquid 21 is specifically a non-conductive silicone oil, and has a refractive index of 1.65.
Further, since information such as the refraction direction and angle of the monitoring laser needs to be observed during the monitoring process, the second monitoring unit 2 is preferably made of a transparent material, and the monitoring laser emitted by the laser emitting assembly 10 has a color, which may be red, green, blue, or another pure color convenient for observation.
Further, the interval time of two adjacent monitoring is about 1~3 seconds, can carry out nimble adjustment according to the condition of the group battery of reality, guarantees that the group battery carries out continuous monitoring during the work, balances the monomer battery 3 that the difference is huge to guarantee that the free work of battery is unified in the group battery. In addition, the ZigBee wireless communication means is used between the control unit 4 and each structure to be controlled, so that the power consumption is low, the reliability is high, and the power supply device can be effectively applied to the local area communication in a small range.
The present application further provides a battery difference monitoring and adjusting method, as shown in fig. 2, which is implemented by using the battery difference monitoring and adjusting system, and includes the steps of:
s1, respectively connecting a plurality of single batteries 3 of a battery pack with one end of a monitoring unit 2 close to a laser emission assembly 10 to apply potential corresponding to the high-voltage end of each single battery 3 to the inner wall of a hollow cavity, so that a liquid phase interface 22 deforms;
s2, judging whether difference adjustment is needed between the two single batteries 3 with the largest capacity difference according to the received position signal of the monitoring laser passing through the liquid phase interface 22;
s3, if not, continuously judging whether the two corresponding single batteries 3 with the largest capacity difference need to be subjected to difference adjustment according to the received position signal of the next beam of monitoring laser, if so, determining the two single batteries 3 with the largest capacity difference by combining the position signal of the monitoring laser and the position information of the connection points of the multiple single batteries 3 and the corresponding ends of the monitoring unit 2 respectively, disconnecting the multiple single batteries 3 from the monitoring unit 2, and performing difference adjustment on the two corresponding single batteries 3;
s4, repeating the steps S1-S3.
Further, if difference adjustment needs to be performed between the two single batteries 3 with the largest difference, it is determined whether the actual capacity difference value of the two single batteries 3 is greater than the maximum capacity difference value, if so, the two corresponding single batteries 3 are both disconnected from the monitoring unit 2, and the two corresponding single batteries 3 are isolated from the other single batteries 3. Specifically, when the monitored capacity difference between the two single batteries 3 with the largest current capacity difference is smaller, no additional adjustment is needed, but if the monitored capacity difference between the two single batteries 3 with the largest current capacity difference is large, the corresponding single battery 3 is isolated from the other single batteries 3, and a person waits for the maintenance of the battery, so that the service efficiency, the safety and the service life of the battery pack are ensured.
Other steps of the battery difference monitoring and adjusting method correspond to the battery difference monitoring and adjusting system, and are not described one by one here.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in this application, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A battery differential monitoring and regulating system, comprising:
a first monitoring unit (1) comprising a laser emitting assembly (10) and a laser receiving assembly (11) for receiving monitoring laser emitted by the laser emitting assembly (10);
the second monitoring unit (2) is arranged between the laser emitting assembly (10) and the laser receiving assembly (11), the second monitoring unit (2) comprises a hollow cavity, conductive liquid (20) and non-conductive liquid (21) are filled in the hollow cavity from left to right, a liquid phase interface (22) is formed between the conductive liquid (20) and the non-conductive liquid (21), one end, close to the laser emitting assembly (10), of the second monitoring unit (2) is respectively used for being connected with a plurality of single batteries (3) of a battery pack, so that electric potential corresponding to the high-voltage end of each single battery (3) is applied to the inner wall of the hollow cavity, and monitoring laser passing through the liquid phase interface (22) is refracted after the liquid phase interface (22) deforms;
the control unit (4) is used for judging whether difference adjustment needs to be carried out between the two single batteries (3) with the largest capacity difference according to the position signal of the monitoring laser which is received by the laser receiving assembly (11) and penetrates through the liquid phase interface (22), and determining the two single batteries (3) with the largest capacity difference by combining the position signal of the monitoring laser and the position information of the connection points of the plurality of single batteries (3) and the corresponding ends of the second monitoring unit (2) respectively so as to carry out difference adjustment on the two corresponding single batteries (3).
2. A battery differential monitoring and regulating system as defined in claim 1, wherein: the second monitoring unit (2) is of a hollow cylinder structure, the second monitoring unit (2) is close to one end of the laser emission assembly (10) and is provided with a plurality of electrode plates (23) arranged at intervals along the circumferential direction of the second monitoring unit, each electrode plate (23) is used for being connected with the corresponding single battery (3), and the electrode plates (23) are used for applying the electric potential corresponding to the high-voltage end of the single battery (3) to the inner wall of the hollow cavity so as to change the shape of the liquid phase interface (22).
3. A battery differential monitoring and regulating system as claimed in claim 1, characterized in that said laser receiving assembly (11) comprises:
one end of the receiving target head (110) close to the second monitoring unit (2) comprises a safety area (111) and an early warning area (112) which are arranged from inside to outside;
and the transmission piece (113) is used for judging whether the monitoring laser received by the receiving target head (110) is positioned in the safety area (111) and the early warning area (112) or not, and sending a corresponding position signal to the control unit (4) after judging that the monitoring laser is positioned in the safety area (111) or the early warning area (112).
4. A battery differential monitoring and regulating system as claimed in claim 1, wherein: still include regulating unit (5), regulating unit (5) include many connecting circuit, many connecting circuit is used for with each battery cell (3) respectively with remaining battery cell (3) all communicate, and each all be equipped with select switch (50) on the connecting circuit, select switch (50) are used for opening or closing under the control of control unit (4) to two that will adjust battery cell (3) intercommunication forms charge-discharge circuit, in order to carry out the difference adjustment.
5. A battery differential monitoring and regulating system as defined in claim 2, wherein: the protection device is characterized by further comprising a protection unit (6), wherein the protection unit (6) comprises an integrated board (60) and a plurality of monitoring switches (61) which are arranged on the integrated board (60) at intervals, each monitoring switch (61) is used for being connected with the high-voltage end of one corresponding single battery (3) and also connected with one corresponding electrode plate (23), and the monitoring switches (61) are used for being opened or closed under the control of the control unit (4) so as to communicate each electrode plate (23) with the corresponding single battery (3).
6. A battery differential monitoring and adjustment system as claimed in claim 5, wherein: each monitoring switch (61) is also provided with a protection element (62) for protecting the corresponding single battery (3).
7. A battery differential monitoring and regulating system as claimed in claim 1, wherein: the conductive liquid (20) is a sodium chloride electrolyte salt solution, the refractive index of the conductive liquid is 1.3, the non-conductive liquid (21) is non-conductive silicone oil, and the refractive index of the non-conductive liquid is 1.65.
8. A battery differential monitoring and regulating system as claimed in claim 1, wherein: the monitoring laser emitted by the laser emitting assembly (10) has a color, and the second monitoring unit (2) is made of a transparent material.
9. A battery differential monitoring and regulating method implemented by the battery differential monitoring and regulating system according to claim 1, characterized by comprising the steps of:
s1, respectively connecting a plurality of single batteries (3) of a battery pack with one end, close to a laser emission assembly (10), of a second monitoring unit (2) so as to apply potential corresponding to the high-voltage end of each single battery (3) to the inner wall of a hollow cavity, and enabling a liquid phase interface (22) to deform;
s2, judging whether difference adjustment is needed between the two single batteries (3) with the largest capacity difference according to the received position signal of the monitoring laser passing through the liquid phase interface (22);
s3, if not, continuously judging whether difference adjustment is needed between the two corresponding single batteries (3) with the largest capacity difference according to the received position signal of the next beam of monitoring laser, if so, determining the two single batteries (3) with the largest capacity difference by combining the position signal of the monitoring laser and the position information of the connection point of the multiple single batteries (3) and the corresponding end of the second monitoring unit (2), disconnecting the multiple single batteries (3) from the second monitoring unit (2), and performing difference adjustment on the two corresponding single batteries (3);
s4, repeating the steps S1-S3.
10. The battery differential monitoring and adjustment method of claim 9, characterized in that:
if the difference between the two single batteries (3) with the largest difference needs to be adjusted, whether the actual capacity difference value of the two single batteries (3) is larger than the maximum capacity difference value is judged, if yes, the two corresponding single batteries (3) are disconnected from the second monitoring unit (2), and the two corresponding single batteries (3) are isolated from the other single batteries (3).
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