CN210401598U - Centralized monitoring device for battery parameters in series battery pack - Google Patents
Centralized monitoring device for battery parameters in series battery pack Download PDFInfo
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- CN210401598U CN210401598U CN201921202001.9U CN201921202001U CN210401598U CN 210401598 U CN210401598 U CN 210401598U CN 201921202001 U CN201921202001 U CN 201921202001U CN 210401598 U CN210401598 U CN 210401598U
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Abstract
The utility model provides a centralized monitoring device of battery parameter in series battery group, include: the relay switch network module, the photoelectric relay gating network module, the battery voltage acquisition module and the alternating current module are connected, and the relay switch network module is respectively connected with the positive electrode and the negative electrode of the serially connected storage battery module through the constant current source charging module and the alternating current module; the battery voltage acquisition module is used for sampling the voltage of all the storage batteries in the series storage battery module and the feedback voltage of the internal resistance test at regular time, and the control module is used for compensating and charging the storage batteries according to the voltage of a single storage battery in the series storage battery module. The utility model provides a current battery management system with high costs, big, the unbalanced technical problem of independent battery voltage to single section battery internal resistance test error.
Description
Technical Field
The utility model relates to a battery test technical field particularly, especially relates to a centralized monitoring device of battery parameter in series battery group.
Background
The internal resistance of the storage battery is an important parameter of the storage battery, and the connection state, the health state and the charge and discharge performance of the single battery in the storage battery can be judged according to the parameter. When the storage battery is in a full-charge state, the internal resistance can reflect the aging degree of the battery, so that the internal resistance test of the battery obtains wide attention. The existing battery internal resistance test system has the problems of confusion of wire resistance and battery internal resistance, measurement of a discrete module and the like. The defects are that the cost is high, the reliability is poor, a control circuit is complex, and the power consumption is high. The voltage of a single battery in the battery pack is often unbalanced after the battery pack is charged and discharged for several times. Causing various problems of insufficient capacity, overcharge and overdischarge of the battery. The utility model provides a single section battery centralized monitoring's method solves above problem. The system realizes multiple functions of one set of line by integrating line resources, thereby effectively reducing the cost.
Disclosure of Invention
In accordance with the above-mentioned technical problem, there is provided a centralized monitoring device for cell parameters in series-connected battery packs, comprising: the device comprises a storage battery module, a relay switch network module, a photoelectric relay gating network module, a constant current source charging module, a battery voltage acquisition module, an alternating current module and a control module which are connected in series.
Furthermore, the relay switch network module and the photoelectric relay gating network module are connected with the positive electrode and the negative electrode of a single battery, the relay switch network module, the photoelectric relay gating network module, the constant current source charging module, the battery voltage acquisition module and the alternating current module are connected, and the constant current source charging module and the alternating current module are respectively connected with the positive electrode and the negative electrode of the serially connected storage battery module through the relay switch network module; the battery voltage acquisition module is used for sampling the voltage of all the storage batteries in the series storage battery module and the feedback voltage of the internal resistance test at regular time, and the control module is used for compensating and charging the storage batteries according to the voltage of a single storage battery in the series storage battery module.
Furthermore, the relay switch network module and the photoelectric relay gating network are respectively connected to the positive electrode and the negative electrode of the battery, and the constant current source charging module and the alternating current module are connected with the storage battery voltage acquisition module through the relay switch network module; the photoelectric relay gating network module is connected with the storage battery voltage acquisition module to acquire feedback quantity.
Furthermore, the constant current source charging module is controlled by the PWM signal of the control module, and a single-section insufficient capacity battery in the storage battery system is charged.
Furthermore, the battery voltage acquisition module is arranged at the output end of the photoelectric relay gating network, and the voltage and the internal resistance of the storage battery selected by the photoelectric relay gating network module are fed back to the alternating voltage during testing; and the photoelectric relays are controlled by the control module to be gated in turn, and the voltage and the internal resistance of each battery are detected independently.
Compared with the prior art, the utility model has the advantages of it is following:
the utility model provides a single section battery centralized monitoring's device among series connection storage battery. The technical problems that an existing battery management system is high in cost, large in testing error of internal resistance of a single battery and unbalanced in voltage of an independent battery are solved. The method has important significance for prolonging the service life of the storage battery pack, judging the health state of the storage battery and judging the connection state of the storage battery.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of the connection mode of the single battery according to the present invention.
Fig. 3 is the schematic diagram of the internal resistance test structure of the present invention.
Fig. 4 is a schematic view of the compensation charging structure of the present invention.
The device comprises a voltage detection module 1, an internal resistance voltage detection module 2, a control module 3, a communication interface 4, a power module 5, a constant current charging module 6, an excitation source signal generation module 7, a display 8, an AD sampling module 9, a photoelectric relay gating network 10 and a relay switch network 11.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1-4, the utility model relates to a centralized monitoring device for battery parameters in series battery, which comprises: the device comprises a storage battery module, a relay switch network module, a photoelectric relay gating network module, a constant current source charging module, a battery voltage acquisition module, an alternating current module and a control module which are connected in series.
In this embodiment, the relay switch network module and the photoelectric relay gating network module are connected to the positive and negative electrodes of a single battery, the relay switch network module, the photoelectric relay gating network module, the constant current source charging module, the battery voltage acquisition module and the alternating current module are connected, and the relay switch network module is connected to the positive and negative electrodes of the serially connected battery modules through the constant current source charging module and the alternating current module; the battery voltage acquisition module is used for sampling the voltage of all the storage batteries in the series storage battery module and the feedback voltage of the internal resistance test at regular time, and the control module is used for compensating and charging the storage batteries according to the voltage of a single storage battery in the series storage battery module.
As a preferred embodiment, the relay switch network module and the photoelectric relay gating network are both connected to the positive electrode and the negative electrode of the battery respectively, and the constant current source charging module and the alternating current module are connected to the storage battery voltage acquisition module through the relay switch network module; the photoelectric relay gating network module is connected with the storage battery voltage acquisition module to acquire feedback quantity.
In this embodiment, the constant current source charging module is controlled by the PWM signal of the control module, and a single-cell insufficient-capacity battery in the storage battery system is charged.
As a preferred embodiment, the battery voltage acquisition module is arranged at the output end of the photoelectric relay gating network, and the voltage and internal resistance of the storage battery selected by the photoelectric relay gating network module feed back an alternating voltage during testing; and the photoelectric relays are controlled by the control module to be gated in turn, and the voltage and the internal resistance of each battery are detected independently.
In this embodiment, the method for testing the internal resistance of the gating network module of the photoelectric relay includes the following steps:
step S11: the control module controls the photoelectric relay gating network module to sequentially gate corresponding single storage batteries, test the voltage of the single storage batteries and record the voltage value of the storage batteries; the control module carries out gating of internal resistance measurement on the battery with the battery voltage in a reasonable range;
step S12: the control module controls the relay switch network to sequentially gate the batteries detected in the step S11 of serially connecting the storage battery packs in turn, the alternating current module injects alternating current into the single batteries, the control module controls the photoelectric relay to gate the network to gate the corresponding single batteries, and the battery voltage acquisition module acquires an acquired and fed-back alternating voltage value and performs internal resistance calculation.
In this embodiment, the control module performs compensation charging on the storage battery according to the voltage of a single storage battery in the series storage battery module, and includes the following steps:
step S21: the control module controls the photoelectric relay gating network to sequentially gate the single batteries in the series storage battery pack, and the battery voltage acquisition module connected with the photoelectric relay gating network samples the voltage of each storage battery to obtain the voltage value of the single battery in the battery pack in real time;
step S22: the control module calculates the difference value between the voltage of the storage battery and the average voltage of the single battery in the battery pack through software, and if the average voltage of the storage battery is lower than the average voltage of the series storage battery and exceeds a given threshold value, the storage battery is judged to need to be independently compensated and charged; if the compensation charging is not required, the steps of S1 to S2 are repeated.
Step S23: the control module controls a relay switch network to connect the constant current source charging module with a battery, and a constant current charging program is started to perform compensation charging on the battery;
step S24: when the battery voltage reaches the average voltage of the individual batteries in the battery pack, steps S21 to S23 are repeated.
As an example of this implementation mode, as shown in fig. 1, the utility model discloses a series battery group system connection schematic diagram, including series battery group B, 1 be voltage detection module, 2 be internal resistance voltage detection module, 3 control module, 4 communication interface, 5 power module, 6 be the constant current module of charging, 7 be excitation source signal generation module, 8 be the display, 9AD sampling module, 10 photoelectric relay gating network, 11 relay switching network. In the embodiment, the storage battery pack is formed by connecting a plurality of batteries (B1, B2. 1 (or 2, determined according to the sampling amount) sampling line is led out from the anode and the cathode of each battery to the detection device, and when the system runs, the control module gates the photoelectric relay in sequence.
The battery B1 is used as an example: during the battery voltage test, the storage battery B1 is connected with the battery voltage detection module 1 and the AD sampling module. The control module obtains a battery voltage value.
During the battery internal resistance test, as shown in fig. 3, the excitation source signal generation module 7 sends out high-frequency alternating current, which is injected into a single battery through S1 and S4 in fig. 2, and the high-frequency alternating current is connected to the internal resistance voltage detection module 2 and the AD sampling module to the control module through K1 and K2, so that the wire resistance Rline1 can be calculated and obtained, the wire resistances Rline 3 and K4 are connected to the internal resistance voltage detection module 2, the wire resistances Rline2 can be calculated and obtained, and the K2 and K3 are connected to the internal resistance voltage detection module 2, so that the battery internal resistance Rb can be calculated.
When the battery is charged in a compensation manner, as shown in fig. 4, according to the battery voltage judgment result, the single battery to be charged is gated to the constant current charging module 6 through S1 and S4 to perform the compensation charging of the single battery.
In the present embodiment, the internal resistance measurement flow:
s11: and measuring the internal resistance of a single battery in the battery pack (similarly testing the resistance of a lead), and sequentially gating the relay switch network 11, such as B1, to be connected with the excitation source signal generation module. The injected AC signal is connected to the battery through the S1 and S4 and two battery connecting wires.
S12: if the battery connecting line is normal, the exciting source signal generating module obtains the alternating current I1, the battery connecting line is broken, the exciting source signal generating module can know that the alternating current I1 is 0, and the circuit fault is judged.
S13: if the excitation current I1 is greater than 0, connecting K2 and K3 to the positive electrode and the negative electrode of B1, and connecting B1 with the internal resistance voltage detection module 2 through K2 and K3 in the gating network of the photoelectric relay to obtain the internal resistance detection voltage U1 of the single battery.
S14: from Rb U1/I1, the battery internal resistance can be calculated.
Similarly, the wire resistance can be obtained by connecting K1 and K2(K3 and K4) to the internal resistance voltage detection module 2.
As a preferred embodiment, for the compensated charge gating procedure:
s21: and measuring the voltage of a single battery in the battery pack, sequentially gating K2 and K3 in the photoelectric relay gating network, and sequentially connecting the battery to the voltage detection module to obtain the voltage of the single battery.
S22: the average value of the battery voltage is calculated, and the difference value calculation is carried out on each battery voltage. If the result exceeds the threshold, the charge compensation routine is run.
S23: the rechargeable battery needs to be compensated through gating of S1 and S4. The constant current charging module 6 is connected to the battery through leads connected with the positive electrode and the negative electrode of the battery through S1 and S4. The battery voltage is monitored in real time by a voltage detection module.
The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (4)
1. A centralized monitoring device for cell parameters in series connected battery packs, comprising:
the system comprises a storage battery module, a relay switch network module, a photoelectric relay gating network module, a constant current source charging module, a battery voltage acquisition module, an alternating current module and a control module which are connected in series;
the relay switch network module, the photoelectric relay gating network module, the battery voltage acquisition module and the alternating current module are connected, and the constant current source charging module and the alternating current module are respectively connected with the positive electrode and the negative electrode of the serially connected storage battery module through the relay switch network module; the battery voltage acquisition module is used for sampling the voltage of all the storage batteries in the series storage battery module and the feedback voltage of the internal resistance test at regular time, and the control module is used for compensating and charging the storage batteries according to the voltage of a single storage battery in the series storage battery module.
2. The device for centralized monitoring of battery parameters in series-connected battery packs according to claim 1, wherein: the relay switch network module and the photoelectric relay gating network are respectively connected to the positive electrode and the negative electrode of the battery, and the constant current source charging module and the alternating current module are connected with the storage battery voltage acquisition module through the relay switch network module; the photoelectric relay gating network module is connected with the storage battery voltage acquisition module to acquire feedback quantity.
3. The device for centralized monitoring of battery parameters in series-connected battery packs according to claim 1, wherein: the constant current source charging module is controlled by the PWM signal of the control module, and a single-section insufficient capacity battery in the storage battery system is charged.
4. The device for centralized monitoring of battery parameters in series-connected battery packs according to claim 1, wherein: the battery voltage acquisition module is arranged at the output end of the photoelectric relay gating network, and the voltage of the storage battery selected by the photoelectric relay gating network module and the voltage fed back during internal resistance testing are selected by the photoelectric relay gating network module; and the photoelectric relays are controlled by the control module to be gated in turn, and the voltage and the internal resistance of each battery are detected independently.
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| CN201921202001.9U CN210401598U (en) | 2019-07-26 | 2019-07-26 | Centralized monitoring device for battery parameters in series battery pack |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110286327A (en) * | 2019-07-26 | 2019-09-27 | 北京东道科技发展有限公司 | The Centralizing inspection device of battery parameter in a kind of series-connected cell group |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110286327A (en) * | 2019-07-26 | 2019-09-27 | 北京东道科技发展有限公司 | The Centralizing inspection device of battery parameter in a kind of series-connected cell group |
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