CN110879350A - Detection method of battery equalization circuit and battery management system - Google Patents
Detection method of battery equalization circuit and battery management system Download PDFInfo
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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Abstract
The invention discloses a detection method of a battery equalization circuit and a battery management system. The output voltage of the equalization circuit is detected when the battery equalization circuit is in a charging state and a discharging state for a certain battery, then the sampled output voltage is compared with the preset voltage, and whether the equalization circuit fails or not is judged according to the comparison result. The detection scheme of the invention can judge whether the equalization circuit fails or not by comparing the sampling signal with the preset signal, has low requirement on a hardware circuit, needs few hardware circuit devices, does not need devices such as operation, amplification, isolated communication, isolated power supply and the like, and has low power consumption, and can detect whether the active equalization circuit fails in a charging state, a discharging state or in a full-failure state.
Description
Technical Field
The invention relates to the technical field of battery management, in particular to a detection method of a battery equalization circuit and a battery management system.
Background
In a large-scale battery system with a large energy storage requirement, the voltage and capacity of the single battery are difficult to meet the requirement, and a plurality of single batteries are often required to be combined into a battery pack in a certain series-parallel connection mode for the large-scale system to use. However, since it is difficult to completely conform the production environment, process parameters, raw materials, etc., each of the produced unit cells has a difference, and the difference between the unit cells is enlarged with time due to the difference in the use environment.
In order to reduce the inconsistency of the battery pack in the use process, an equalization circuit needs to be added to the battery, an active equalization mode is generally adopted for equalization in the prior art, for example, the equalization is performed by taking a DC-DC switching power supply as an active equalization circuit (as shown in fig. 1), each equalization circuit is connected between two adjacent batteries, each equalization circuit is connected with an analog front end circuit (AFE), the analog front end circuit also samples battery voltage information, and the battery voltage information is communicated with an upper control unit (MCU) through an isolation circuit, so that the equalization of the battery pack is realized. As shown in fig. 1, a plurality of active equalization circuits are required due to a large number of battery strings, and when a certain equalization circuit fails, a corresponding single battery is overcharged or overdischarged, thereby causing a safety problem of the entire battery pack. Therefore, the detection of the equalization circuit is required.
In the prior art, the detection of the active equalization circuit is usually to sample the output current, as shown in fig. 2, the current detection resistor Rs converts the sampled current information into voltage information, and the voltage information is processed by operational amplifiers OP1 and OP2 and then output to an upper control unit (MCU). Because the active equalization circuit usually performs energy bidirectional transmission, the current is bidirectional, so that the voltage on the current detection resistor Rs can be positive or negative, two operational amplifiers are needed to amplify a positive voltage signal and a negative voltage signal respectively, or one operational amplifier powered by a positive power supply source and a negative power supply source is used to amplify the voltage signal.
In the detection mode of the equalization circuit, each active equalization circuit needs an independent current detection resistor and two operational amplification circuits, so that the circuit devices are more and the cost is high; the output end of one operational amplifier circuit needs to correspond to an AD interface of the MCU, and the requirement on the AD resource of the MCU is high; and devices with larger power consumption, such as a sampling resistor, are needed; in addition, the reference ground of each active equalization module is different, and an isolation circuit is needed, so that the detection of each active equalization module needs a detection circuit, an isolation power supply circuit and an analog or digital signal isolation circuit, and the system is complex.
Disclosure of Invention
In view of this, the present invention provides a detection method for a battery equalization circuit and a battery management system. The method comprises the steps of sampling the output voltage of the battery equalization circuit in a charging state and a discharging state, and judging whether the equalization circuit is invalid or not through the size of the sampled output voltage signal and the size of a preset voltage signal.
The detection method of the battery equalization circuit comprises the following steps:
when the equalization circuit is in a charging state and a discharging state for a certain battery, the output voltage of the equalization circuit is respectively sampled to obtain a first sampling signal and a second sampling signal;
comparing the first sampling signal with a first preset voltage, and comparing the second sampling signal with a second preset voltage;
and judging whether the equalizing circuit is invalid or not according to the comparison result.
Preferably, the equalization circuit receives a first enable signal and a second enable signal,
the equalization circuit works in a stop state, a charging state and a discharging state according to the high-low level states of the first enabling signal and the second enabling signal.
Preferably, the step of determining whether the equalization circuit fails according to the result of the comparison specifically includes:
if the first sampling signal is larger than the value of the first preset voltage and the second sampling signal is smaller than the value of the second preset voltage, judging that the equalizing circuit works normally; otherwise, judging that the equalizing circuit is invalid.
Preferably, the step of determining whether the equalization circuit is failed according to the result of the comparison further comprises:
if the first sampling signal is smaller than or equal to the value of the first preset voltage, the charging control of the equalizing circuit is invalid;
if the second sampling signal is larger than or equal to the second preset voltage value, the discharge control of the equalization circuit is invalid;
and if the first sampling signal is less than or equal to the value of the first preset voltage and the second sampling signal is greater than or equal to the value of the second preset voltage, the equalizing circuit fails completely.
Preferably, the step of setting the first preset voltage and the second preset voltage includes:
sampling the output voltage of the equalizing circuit in a stop state to obtain a first voltage signal;
setting a first comparison threshold voltage and a second comparison threshold voltage;
the sum of the voltage values of the first voltage signal and the first comparison threshold voltage is used as the voltage value of the first preset voltage;
and the difference between the voltage values of the first voltage signal and the second comparison threshold voltage is used as the voltage value of the second preset voltage.
Preferably, the voltage value of the first comparison threshold voltage is set to be smaller than a voltage drop value of equivalent impedance of a line where the equalization circuit is located in a charging state;
the voltage value of the second comparison threshold voltage is set to be smaller than the voltage drop value of the equivalent impedance of the line where the equalizing circuit is located in the discharging state.
Specifically, when the first enable signal and the second enable signal are both at a high level or a low level, the equalization circuit is in a stop state;
when the first enabling signal is at a high level and the second enabling signal is at a low level, the equalizing circuit works in a charging state;
when the first enable signal is at a low level and the second enable signal is at a high level, the equalizing circuit operates in a discharging state.
The battery management system comprises a plurality of batteries, a plurality of battery equalization circuits corresponding to the batteries, an analog front-end circuit and an upper control machine,
the analog front-end circuit is connected with the plurality of equalizing circuits, and when a certain equalizing circuit performs a charging state and a discharging state on a corresponding battery, the analog front-end circuit samples the output voltage of the equalizing circuit to obtain a first sampling signal and a second sampling signal;
the upper control machine receives a first sampling signal and a second sampling signal, compares the first sampling signal with a first preset voltage and compares the second sampling signal with a second preset voltage,
and the upper control machine judges whether the equalizing circuit fails or not according to the comparison result.
Specifically, the upper control machine outputs a first enable signal and a second enable signal to the plurality of equalization circuits, and each equalization circuit can work in a stop state, a charge state and a discharge state according to the high-low level states of the first enable signal and the second enable signal.
Specifically, the upper control machine determines that: if the first sampling signal is larger than the value of the first preset voltage and the second sampling signal is smaller than the value of the second preset voltage, the equalizing circuit works normally; otherwise, the equalization circuit fails.
Specifically, the upper control machine provides a computer program that implements a comparison process of the sampling signal and a preset voltage and implements a failure determination process of the equalization circuit.
Specifically, the computer program sets values of the first preset voltage and the second preset voltage in a manner that:
receiving the output voltage of the equalizing circuit in a stop state to obtain a first voltage signal;
setting a first comparison threshold voltage and a second comparison threshold voltage;
the sum of the voltage values of the first voltage signal and the first comparison threshold voltage is used as the voltage value of the first preset voltage; and the difference between the voltage values of the first voltage signal and the second comparison threshold voltage is used as the voltage value of the second preset voltage.
In summary, the detection method of the battery equalization circuit and the battery management system according to the invention are provided. The method comprises the steps of detecting the output voltage of a battery equalization circuit in a charging state and a discharging state of a certain battery, comparing the sampled output voltage with a preset voltage, and judging whether the equalization circuit fails or not according to the comparison result. The detection scheme of the invention can judge whether the equalizing circuit is invalid or not by comparing the sampling signal with the preset signal, and the detection scheme realizes the comparison of the sampling signal and the invalid judgment of the equalizing circuit by the computer program in the upper control machine. The scheme of the invention has low requirement on a hardware circuit, needs few hardware circuit devices, does not need additional devices such as a current detection resistor, an operational amplifier, an isolation power supply, a digital isolator and the like, has low power consumption, is very suitable for occasions with requirements on static power consumption, and can detect whether the active equalization circuit is in a charging state failure, a discharging state failure or a full failure.
Drawings
FIG. 1 is a system block diagram of a battery equalization circuit;
FIG. 2 is a circuit diagram of one embodiment of a prior art battery equalization detection circuit;
FIG. 3 is a schematic block diagram of a battery equalization detection circuit according to the present invention;
FIG. 4 is a flow chart of a battery equalization detection method according to the present invention;
FIG. 5 is a schematic diagram of the charging and discharging process of the detection method according to the present invention;
fig. 6 is a voltage diagram according to the charge and discharge process of fig. 5.
Detailed Description
Some preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings, and technical solutions in the embodiments of the present invention will be clearly and completely described, but the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Ordinal words such as "first" and "second" are referred to herein merely as labels, and do not have any other meaning, such as a particular order, etc. Also, for example, the term "first end" does not itself imply a positional limitation of "second end", and the term "second end" does not itself imply a positional limitation of "first end".
Referring to fig. 3, a schematic block diagram of a battery equalization detecting circuit according to the present invention, and fig. 4, a flowchart of a battery equalization detecting method according to the present invention, the inventive contents of the present invention will be described with reference to fig. 3 and 4. The equalization circuit takes a DC/DC switching power supply as an active equalization circuit as an example, and the DC/DC switching power supply can be any one of a Buck switching power supply, a Boost switching power supply and a forward or flyback switching power supply.
The DC/DC active equalization circuit is connected between two adjacent batteries, such as between a battery Bat1 and a battery Bat2, and the batteries in the invention are all energy storage batteries, as shown in FIG. 3. The resistor R1, the resistor R2, the resistor R3 and the resistor R4 in fig. 3 are equivalent impedances of the circuit on which the DC/DC active balancing power supply is located, such as all impedances in the balancing current loop including the wires, connector contacts, fuses, PCB wiring, battery internal resistance and other integrated resistors, and it is known to those skilled in the art that such equivalent impedances are inevitable that voltage drops occur during normal operation of the balancing circuit.
Referring to fig. 4, the detection method includes sampling the output voltage of the equalization circuit in a charging state and a discharging state of a certain battery to obtain a first sampling signal and a second sampling signal. In the present embodiment, the example of sampling the output voltage signal of the equalizing circuit of the battery Bat2 in the charging and discharging states by the analog front end circuit (AFE) is described, and similarly, the analog front end circuit may sample the output voltage signal of the battery Bat1 in the charging and discharging states. As shown in fig. 5, here, the first sampling signal corresponds to a charging state, the second sampling signal corresponds to a discharging state, and the first sampling signal is denoted as VCharging deviceSaid second sampling signal is denoted as VPut. It should be added that the output voltage signal of the equalizing circuit represents the output voltage signal of the equalizing circuit in different charging and discharging states, and there is no limitation on the direction of the voltage signal, and voltage signals in the same or equivalent meaning are within the protection scope of the present invention.
In this embodiment, the DC/DC balance circuit receives a first enable signal EN1 and a second enable signal EN2 from an upper control machine (e.g., a single-chip microcomputer MCU), and operates in a stop state, a charging state and a discharging state according to the high-low level states of the first enable signal and the second enable signal, where the stop state refers to a state where neither charging nor discharging is performed. Specifically, when both the first enable signal EN1 and the second enable signal EN2 are high level or low level, the DC/DC equalizing circuit is in a stopped state; when the first enable signal EN1 is at a high level and the second enable signal EN2 is at a low level, the equalizing circuit works in a charging state; when the first enable signal EN1 is at low level and the second enable signal EN2 is at high level, the equalization circuit operates in a discharging state. It is obvious to those skilled in the art that the detection timing sequence may have other timing sequences as long as three operation states of the equalization circuit are realized.
Then, the detection method comprises the steps of comparing the first sampling signal with a first preset voltage and comparing the second sampling signal with a second preset voltage. Here, the comparison process is implemented by a computer program in a higher-level control machine, such as by a software algorithm. Firstly, the computer program sets the values of the first preset voltage and the second preset voltage in a specific setting mode including sampling the battery voltage of the equalizing circuit in a stop state to obtain a first voltage signal Vb(as shown in fig. 5); setting a first comparative threshold voltage Va1And a second comparison threshold voltage Va2(ii) a The sum of the voltage values of the first voltage signal and the first comparison threshold voltage is taken as the voltage value of the first preset voltage and is marked as Vb+Va1(ii) a The voltage value of the second preset voltage is recorded as V as the difference between the first voltage signal and the second comparison threshold voltageb-Va2。
In this embodiment, the first comparison threshold voltage Va1Is set to be smaller than the voltage drop value of the equivalent impedance (such as a resistor R3 and a resistor R4) of the line of the equalizing circuit in the charging state; the second comparison threshold voltage Va2Is set to be smaller than the voltage drop value of the equivalent impedance (such as the resistor R3 and the resistor R4) of the line on which the equalizing circuit is located in the discharging state. The first comparison threshold voltage Va1And a second comparison threshold voltage Va2May be set equal or different according to requirements. As will be appreciated by those skilled in the art, the first comparative threshold voltage Va1And a second comparison threshold voltage Va2It needs to be larger than the normal fluctuation range of the battery sampling voltage.
Then, the upper control machine judges whether the equalization circuit fails or not according to the comparison result. Also, the determination process in the present invention is realized by a computer program of the MCU. Referring to the schematic diagram shown in fig. 6, in particular, the first sampling signal VCharging deviceIs greater than the first preset voltage Vb+Va1And the second sampling signal VPutIs less than the second preset voltage Vb-Va2The equalization circuit is operating normally; otherwise, the equalization circuit fails. Further, if the first sampling signal V isCharging deviceLess than or equal to the first preset voltage Vb+Va1If so, the charging control of the equalizing circuit is invalid; if the second sampling signal VPutGreater than or equal to the second preset voltage Vb-Va2If so, the discharge control of the equalization circuit fails; the first sampling signal VCharging deviceLess than or equal to the first preset voltage Vb+Va1And the second sampling signal VPutGreater than or equal to the second preset voltage Vb-Va2Is equal to (1), the equalization circuit is fully disabled. Here, the upper control computer may make the determination by a software algorithm, such asAnd if the judgment result is that the failure fault occurs, warning is provided, and the use safety of the equalizing circuit is improved.
The principle of the equalization circuit failure determination is explained below with reference to the schematic diagrams of fig. 5 and 6: according to the principle of voltage drop of the equivalent impedance, the first sampling signal and the second sampling signal sampled by the analog front-end circuit AFE are actually the sum of the voltage value of the battery voltage signal and the voltage value of the voltage drop on the equivalent impedance, for example, when the upper control machine controls the DC/DC equalization circuit to charge the Bat2, the equalization current flows out of the DC/DC equalization circuit, flows back to the DC/DC active equalization circuit after passing through the resistor R3, the battery Bat2 and the resistor R4, the voltage drops caused on the equivalent impedance R3 and the R4 are in the same direction as the voltage of the battery Bat2, that is, the signal V sampled by the sampling circuit is the sum of the voltage value of the battery voltage signal and the voltage value of theCharging deviceBattery Bat2 voltage + line impedance drop, voltage VCharging device＞VbSuch as the charging period in fig. 5. When the upper control machine controls the DC/DC balancing circuit to discharge to the battery Bat2, the balancing current flows out of the DC/DC active balancing circuit, flows back to the DC/DC active balancing circuit after passing through the resistor R4, the battery Bat2 and the resistor R3, the voltage drops caused on the equivalent impedances R3 and R4 are opposite to the positive direction of the voltage of the battery Bat2, namely the voltage V sampled by the sampling circuitPutBattery Bat2 voltage-line impedance drop, voltage VPut<VbWhen the result of the comparison then characterizes the sampled signal VCharging device＞Vb+Va1And V isPut＜Vb-Va2If the active equalization circuit is normal, the active equalization module is considered to be invalid as long as one condition is not met.
Those skilled in the art will appreciate that the embodiment of the present invention can detect the equalization circuit according to the detection timing shown in fig. 6, but is not limited thereto.
It should be added that, the batteries Bat1 and Bat2 are energy storage devices, the change of the battery voltage requires a certain time, the power batteries have larger capacities, the equalizing current of the active equalizing circuit is smaller relative to the battery capacity, the voltage sampling period is shorter, and the change of the equalizing current to the battery voltage is very small within a range of several sampling periods, so in the present embodiment, the battery voltage is considered to be unchanged during the sampling period.
The above process is illustrated by using Bat2 as an example, and similarly, sampling the voltage of Bat1 and the voltage drop values of the equivalent resistors R1 and R2 can also be implemented to determine whether the active equalization circuit fails. The principle is the same as Bat2, and is not described in detail here.
According to the above process, the detection scheme of the equalization circuit in the application only needs to control the enable signals of the equalization circuit in the stop state, the charge state and the discharge state, then the comparison result indicating whether the equalization circuit normally works can be obtained according to the comparison between the sampling voltage values in different states and the preset voltage value, and whether the equalization circuit fails or not and at which stage the equalization circuit fails can be obtained according to the difference of the comparison result. The detection scheme of the equalizing circuit can judge whether the equalizing circuit fails or not by comparing the sampling signal with the preset signal, the comparison and judgment processes of the detection scheme can be realized only by a computer software program of the MCU, the requirement on a hardware circuit is low, the required hardware circuit devices are few, devices such as an operational amplifier, a current detection resistor, an isolation power supply, a digital isolation and the like are not needed, the power consumption is low, and the detection scheme is very suitable for occasions with requirements on static power consumption. The computer program in the present application may be provided on a computer readable medium, which may be a physical computer readable medium or other medium that can implement the same functions.
Finally, the invention also discloses a battery management system, which comprises a plurality of batteries, a plurality of battery equalization circuits corresponding to the batteries, an analog front-end circuit and an upper control machine,
the analog front-end circuit is connected with the plurality of equalizing circuits, and when a certain equalizing circuit performs a charging state and a discharging state on a corresponding battery, the analog front-end circuit samples the output voltage of the equalizing circuit to obtain a first sampling signal and a second sampling signal;
the upper control machine receives a first sampling signal and a second sampling signal, compares the first sampling signal with a first preset voltage and compares the second sampling signal with a second preset voltage,
and the upper control machine judges whether the equalizing circuit fails or not according to the comparison result.
Further, the upper control machine outputs a first enable signal and a second enable signal to the plurality of equalization circuits, and each equalization circuit can work in a stop state, a charging state and a discharging state according to the high-low level states of the first enable signal and the second enable signal.
Further, the upper control machine determines that: if the first sampling signal is larger than the value of the first preset voltage and the second sampling signal is smaller than the value of the second preset voltage, the equalizing circuit works normally; otherwise, the equalization circuit fails.
Specifically, the upper control machine provides a computer program that implements the comparison and determination process.
In a similar way, the battery management system has the technical effects of few circuit devices, low power consumption, convenience in detection, good adaptability and the like.
Although the detection method of the battery equalization circuit and the battery management system according to the preferred embodiment of the present invention have been described in detail, the circuits and advantages of the patent should not be considered to be limited to the above description, and the disclosed embodiment and the accompanying drawings can better understand the present invention.
Claims (12)
1. A detection method of a battery equalization circuit is characterized by comprising the following steps:
when the equalization circuit is in a charging state and a discharging state for a certain battery, the output voltage of the equalization circuit is respectively sampled to obtain a first sampling signal and a second sampling signal;
comparing the first sampling signal with a first preset voltage, and comparing the second sampling signal with a second preset voltage;
and judging whether the equalizing circuit is invalid or not according to the comparison result.
2. The detection method according to claim 1, further comprising:
the equalization circuit receives a first enable signal and a second enable signal,
the equalization circuit works in a stop state, a charging state and a discharging state according to the high-low level states of the first enabling signal and the second enabling signal.
3. The method according to claim 1, wherein the step of determining whether the equalization circuit is disabled according to the comparison result specifically comprises:
if the first sampling signal is larger than the value of the first preset voltage and the second sampling signal is smaller than the value of the second preset voltage, judging that the equalizing circuit works normally; otherwise, judging that the equalizing circuit is invalid.
4. The method of claim 3, wherein determining whether the equalization circuit is disabled based on the comparison further comprises:
if the first sampling signal is smaller than or equal to the value of the first preset voltage, the charging control of the equalizing circuit is invalid;
if the second sampling signal is larger than or equal to the second preset voltage value, the discharge control of the equalization circuit is invalid;
and if the first sampling signal is less than or equal to the value of the first preset voltage and the second sampling signal is greater than or equal to the value of the second preset voltage, the equalizing circuit fails completely.
5. The method according to claim 1, wherein the step of setting the first preset voltage and the second preset voltage comprises:
sampling the output voltage of the equalizing circuit in a stop state to obtain a first voltage signal;
setting a first comparison threshold voltage and a second comparison threshold voltage;
the sum of the voltage values of the first voltage signal and the first comparison threshold voltage is used as the voltage value of the first preset voltage;
and the difference between the voltage values of the first voltage signal and the second comparison threshold voltage is used as the voltage value of the second preset voltage.
6. The detection method according to claim 5, wherein a voltage value of the first comparison threshold voltage is set to be smaller than a voltage drop value of an equivalent impedance of a line on which the equalization circuit is located in a charged state;
the voltage value of the second comparison threshold voltage is set to be smaller than the voltage drop value of the equivalent impedance of the line where the equalizing circuit is located in the discharging state.
7. The detection method according to claim 2, comprising:
when the first enable signal and the second enable signal are both high level or low level, the equalization circuit is in a stop state;
when the first enabling signal is at a high level and the second enabling signal is at a low level, the equalizing circuit works in a charging state;
when the first enable signal is at a low level and the second enable signal is at a high level, the equalizing circuit operates in a discharging state.
8. A battery management system comprises a plurality of batteries and a plurality of battery equalization circuits corresponding to the batteries, and is characterized by also comprising an analog front-end circuit and an upper control machine,
the analog front-end circuit is connected with the plurality of equalizing circuits, and when a certain equalizing circuit performs a charging state and a discharging state on a corresponding battery, the analog front-end circuit samples the output voltage of the equalizing circuit to obtain a first sampling signal and a second sampling signal;
the upper control machine receives a first sampling signal and a second sampling signal, compares the first sampling signal with a first preset voltage and compares the second sampling signal with a second preset voltage,
and the upper control machine judges whether the equalizing circuit fails or not according to the comparison result.
9. The battery management system of claim 8, wherein the upper control machine outputs a first enable signal and a second enable signal to the plurality of equalization circuits,
each of the equalization circuits may operate in a stop state, a charge state, and a discharge state according to high and low states of a first enable signal and a second enable signal.
10. The battery management system according to claim 8, wherein the upper control machine determines that: if the first sampling signal is larger than the value of the first preset voltage and the second sampling signal is smaller than the value of the second preset voltage, the equalizing circuit works normally; otherwise, the equalization circuit fails.
11. The battery management system according to claim 8, wherein the upper control machine provides a computer program that implements a comparison process of the sampling signal and a preset voltage and implements a failure determination process of the equalization circuit.
12. The battery management system of claim 11, wherein the computer program sets the values of the first preset voltage and the second preset voltage in a manner comprising:
receiving the output voltage of the equalizing circuit in a stop state to obtain a first voltage signal;
setting a first comparison threshold voltage and a second comparison threshold voltage;
the sum of the voltage values of the first voltage signal and the first comparison threshold voltage is used as the voltage value of the first preset voltage;
and the difference between the voltage values of the first voltage signal and the second comparison threshold voltage is used as the voltage value of the second preset voltage.
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| CN111969676A (en) * | 2020-08-04 | 2020-11-20 | 合肥博艾思电池科技有限公司 | Battery connecting line breakage detection method based on active equalization |
| CN113346567A (en) * | 2021-03-22 | 2021-09-03 | 上海空间电源研究所 | Lithium ion storage battery monomer active equalization circuit for carrying |
| CN114498815A (en) * | 2021-12-28 | 2022-05-13 | 安徽锐能科技有限公司 | Inductive active equalization unit and hardware indication circuit thereof |
| CN116559634A (en) * | 2023-07-11 | 2023-08-08 | 杭州华塑科技股份有限公司 | Circuit fault detection method and device, storage medium and electronic equipment |
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| CN113346567A (en) * | 2021-03-22 | 2021-09-03 | 上海空间电源研究所 | Lithium ion storage battery monomer active equalization circuit for carrying |
| CN113346567B (en) * | 2021-03-22 | 2022-10-28 | 上海空间电源研究所 | Lithium ion storage battery monomer active equalization circuit for carrying |
| CN114498815A (en) * | 2021-12-28 | 2022-05-13 | 安徽锐能科技有限公司 | Inductive active equalization unit and hardware indication circuit thereof |
| CN116559634A (en) * | 2023-07-11 | 2023-08-08 | 杭州华塑科技股份有限公司 | Circuit fault detection method and device, storage medium and electronic equipment |
| CN116559634B (en) * | 2023-07-11 | 2023-09-12 | 杭州华塑科技股份有限公司 | Circuit fault detection method and device, storage medium and electronic equipment |
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Application publication date: 20200313 |