CN220584379U - Broken wire detection circuit of battery serial formation system - Google Patents
Broken wire detection circuit of battery serial formation system Download PDFInfo
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- CN220584379U CN220584379U CN202321933587.2U CN202321933587U CN220584379U CN 220584379 U CN220584379 U CN 220584379U CN 202321933587 U CN202321933587 U CN 202321933587U CN 220584379 U CN220584379 U CN 220584379U
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- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 64
- 238000001514 detection method Methods 0.000 title claims abstract description 32
- 239000000523 sample Substances 0.000 claims abstract description 39
- 238000005070 sampling Methods 0.000 claims abstract description 28
- 230000003044 adaptive effect Effects 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 29
- 229910052751 metal Inorganic materials 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model relates to a detection circuit, in particular to a broken wire detection circuit of a battery serial formation system. The broken line detection circuit of the battery serial formation system is characterized by comprising a main control circuit, a constant current circuit, a switching circuit and a sampling circuit. The main control circuit is connected with the switching circuit and the sampling circuit in an adaptive manner, the constant current circuit is connected with the switching circuit in an adaptive manner, and the sampling circuit is connected with the constant current circuit in an adaptive manner. The switching circuit is connected with the probes of the battery serial formation system in an adapting way, and is used for switching the current of the constant current circuit to the probes of different positions of the battery serial formation system according to the instruction of the main control circuit, so that the constant current of the constant current circuit forms voltage drop through the corresponding probes. The sampling circuit is used for sampling and comparing the constant current of the constant current circuit and the current after voltage drop, and sending the comparison result to the main control circuit. The circuit is judged correctly, so that the normal operation of the system can be ensured, and faults and dangers can be avoided.
Description
Technical Field
The utility model relates to a detection circuit, in particular to a broken wire detection circuit of a battery serial formation system.
Background
With the development of mobile and miniaturized electronic communication products and the wide application of power lithium batteries in new energy electric automobiles, batteries become a global research hotspot. The key process for directly influencing the quality of the battery in the production process of the lithium battery is a battery formation process. The battery formation method is divided into single-point formation and series formation. The single-point formation is also parallel formation, and is a traditional application mode, and the basic principle is that each battery is provided with an independent charge and discharge module for independent charge and discharge, and no influence is basically caused among single battery cells. The basic principle of the serial formation is that a series of batteries (the specific number is different according to different designs) are connected in series to charge all the batteries simultaneously, so that the current consistency of the batteries is ensured, and meanwhile, in order to meet the control of the traditional charge and discharge to a single battery and the constant voltage function of the battery, a bypass control module is added at two ends of each battery. The advantages of tandem formation over single-site formation are: the current consistency is good, the equipment of the formation system has small volume, high efficiency, low cost, low debugging, overhauling and maintenance cost, low energy consumption of the whole formation process and low cost. The software and hardware equipment for realizing battery serial formation becomes a battery serial formation system, and the hardware of the battery serial formation system consists of a serial formation power supply, a bypass control module, a needle bed and the like. The batteries formed in series use the same current for formation, each component adopts a series connection method, once the current loop is disconnected due to wire harness disconnection, terminal falling and the like in the series current loop, formation of all battery cells connected in series cannot be normally performed or even possibly causes danger, so that the disconnection detection of the series formation system is a necessary function.
The traditional broken wire detection of the serial formation system has two types, and the first type is to collect voltage through a voltage collection circuit and judge the magnitude of the collected voltage and whether the broken wire detection and judgment are carried out. Although the method can effectively judge the complete disconnection of the current loop caused by the complete disconnection of the probe, the wire harness, the terminal and the like, the input impedance of the voltage acquisition circuit is generally larger, the current of the acquisition circuit is generally in the uA-mA level, and when the probe, the wire harness and the terminal are not completely disconnected and contact faults similar to the contact faults are generated, the contact resistance slightly larger can not form effective voltage drop on the input impedance of the acquisition circuit which is larger by several orders of magnitude, so that the accurate judgment can not be realized. Moreover, in the normal large-current formation process, the contact failure easily causes extra voltage drop and power consumption due to abnormal increase of contact impedance, so that the formation process cannot be normally performed due to system alarm, and even the dangers such as probe, terminal and wire harness heating damage occur. The second is a mode of detecting disconnection by using a high-voltage serial formation power supply output current and then detecting voltage of the battery serial formation system, which has the disadvantage that, because the high-voltage serial formation power supply has high voltage when being opened, and the bypass control module generally adopts a low-voltage switching device for controlling cost, once disconnection and poor contact occur, the opened high voltage of the high-voltage serial formation power supply may break through the low-voltage switching device of the bypass control module, causing faults and risks. The present utility model has been made to solve these problems by adopting an improved method.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a broken line detection circuit of a battery serial formation system, which has correct judgment, can ensure the normal operation of the system and can avoid faults and dangers.
In order to solve the problems, the following technical scheme is provided:
the broken line detection circuit of the battery serial formation system is characterized by comprising a main control circuit, a constant current circuit, a switching circuit and a sampling circuit. The main control circuit is connected with the switching circuit and the sampling circuit in an adaptive manner, the constant current circuit is connected with the switching circuit in an adaptive manner, and the sampling circuit is connected with the constant current circuit in an adaptive manner. The output end of the constant current circuit outputs constant current; the switching circuit is connected with the probes of the battery serial formation system in an adapting way, and is used for switching the current of the constant current circuit to the probes of different positions of the battery serial formation system according to the instruction of the main control circuit, so that the constant current of the constant current circuit forms voltage drop through the corresponding probes. The sampling circuit is used for sampling and comparing the constant current of the constant current circuit and the current after voltage drop is formed, and sending the comparison result to the main control circuit.
The switching circuit comprises at least two connector groups, and the number of the connector groups corresponds to the number of the probe groups of the needle bed one by one. The first metal pads in the joint group are respectively connected with the output ends of the constant current circuits through a first switch, and the second metal pads in the joint group are respectively connected with the input ends of the constant current circuits through a second switch. One of the joint groups is provided with a third switch, one end of the third switch is connected with the output end of the constant current circuit, and the other end of the third switch is connected with a second metal pad of the joint group; the main control circuit is connected with the first switch, the second switch and the third switch in an adapting way and is used for controlling the opening or closing of the first switch, the second switch and the third switch.
The constant current circuit comprises a current positive port, a current negative port, an operational amplifier U1 and an operational amplifier U2; the current positive port is connected with VDD, the current positive port is the output end of the constant current circuit, and the current negative port inputs the current after voltage drop is formed by the corresponding probe. The inverting input end of the operational amplifier U1 is connected with one end of a resistor R4, the other end of the resistor R4 is grounded, the non-inverting input end of the operational amplifier U1 is respectively connected with one ends of a resistor R7 and a resistor R9, the other end of the resistor R9 is grounded, the other end of the resistor R7 is respectively connected with one end of a resistor R8 and the source electrode of an NMOS tube Q1, and the other end of the resistor R8 is grounded. The output end of the operational amplifier U1 is respectively connected with one ends of a resistor R5 and a resistor R1, the other end of the resistor R1 is connected with the reverse input end of the operational amplifier U1, the other end of the resistor R5 is respectively connected with one end of a resistor R3, one end of a resistor R2 and the reverse input end of the operational amplifier U2, the other end of the resistor R3 is adaptively connected with a main control circuit, the main control circuit sends a current given signal to the resistor R3, and the other end of the resistor R2 is connected with-VCC. The non-inverting input end of the operational amplifier U2 is grounded, the output end of the operational amplifier U2 is connected with one end of a capacitor C1 and one end of a resistor R6 respectively, the other end of the capacitor C1 is connected with the inverting input end of the operational amplifier U2, the other end of the resistor R6 is connected with the grid electrode of an NMOS tube Q1, and the drain electrode of the NMOS tube Q1 is connected with the current negative end port.
The sampling circuit comprises an operational amplifier U3, wherein the inverting input end of the operational amplifier U3 is connected with one end of a resistor R11, the other end of the resistor R11 is input with current which is subjected to voltage drop through a corresponding probe, the non-inverting input end of the operational amplifier U3 is respectively connected with one end of a capacitor C2, one end of a resistor R14 and one end of a resistor R13, the other end of the capacitor C2 and the other end of the resistor R14 are grounded, and the other end of the resistor R13 is input with constant current. The output end of the operational amplifier U3 is respectively connected with one end of the capacitor C4, one end of the resistor R10 and one end of the resistor R20, the other ends of the capacitor C4 and the resistor R10 are both connected with the inverting input end of the operational amplifier U3, the other end of the resistor R20 is connected with a sampling signal interface of the main control circuit, one end of the resistor R20 connected with the main control circuit is connected with one end of the capacitor C10, and the other end of the capacitor C10 is grounded.
The master control circuit comprises a chip U4 with the model TMS320F 28030.
By adopting the scheme, the method has the following advantages:
the constant current is output from the output end of the constant current circuit of the broken line detection circuit of the battery serial formation system, the switching circuit is connected with the probes of the battery serial formation system in an adapting way, the switching circuit is used for switching the current of the constant current circuit to the probes at different positions of the battery serial formation system according to the instruction of the main control circuit, so that the constant current of the constant current circuit forms voltage drop through the corresponding probes, and the sampling circuit is used for sampling and comparing the constant current of the constant current circuit and the current after the voltage drop is formed and sending the comparison result to the main control circuit. When the circuit is used, constant current is applied to the corresponding probe loop, so that the low impedance of the current loop flows through the constant current, and then the constant current is amplified into a measurable voltage analog quantity with proper size by adopting a circuit, thereby improving the resolution and the sensitivity of voltage detection, improving the identification accuracy of broken wire detection, and simultaneously enabling the circuit to have the detection capability of broken wire hidden danger by voltage monitoring judgment with high resolution and sensitivity. Thus, it is possible to detect a disconnection when the current loop is completely disconnected (impedance is infinite), and it is also possible to detect a disconnection (hidden trouble) caused by a contact resistance becoming high due to a contact failure of a probe, a terminal, a wire harness, or the like of the current loop. Thereby simultaneously avoiding the potential safety hazards of poor contact and open circuit.
Drawings
Fig. 1 is a schematic diagram of a broken wire detection circuit of a battery serial formation system of the present utility model;
FIG. 2 is a schematic circuit diagram of a constant current circuit in a disconnection detection circuit of the battery serial formation system of the present utility model;
FIG. 3 is a schematic circuit diagram of a sampling circuit in a break detection circuit of the battery serial formation system of the present utility model;
FIG. 4 is a schematic circuit diagram of a switching circuit in a disconnection detecting circuit of the battery serial formation system of the present utility model;
fig. 5 is a schematic circuit diagram of a master circuit in a disconnection detecting circuit of the battery serial formation system of the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples.
As shown in fig. 1, the left-side broken line frame is a battery serial formation system, and the right-side broken line frame is a broken line detection circuit of the battery serial formation system of the present utility model. The battery serial formation system is composed of serial formation power sources, bypass control modules 1 to n (n is the number of the bypass control modules arranged), and needle beds. The bypass control modules are connected in series by connecting wires or connecting pieces of L1C, L C and L3C. LnC, and the bypass control modules are connected with the metal probes of the needle bed through connecting wires or connecting pieces of L1A, L1B, L2A, L2C, L A, L3 C.LnA, lnC. Wire breaks often occur on connection wires or connectors such as L1A, L1B, L1C, L2A, L2B, L2C, L3A, L B, L3c.
As shown in FIG. 1, the disconnection detection circuit of the battery serial formation system comprises a main control circuit, a constant current circuit, a switching circuit and a sampling circuit.
As shown in fig. 5, the master circuit contains a chip U4, model TMS320F 28030. The pin 56 of the chip U4 is connected with one end of a resistor R15, the other end of the resistor R15 outputs a current given signal, the end of the resistor R15 is connected with one end of a capacitor C6, the other end of the capacitor C6 is grounded, and the capacitor C6 is used for filtering and shaping so as to ensure the stability of the current given signal. The 14 port of the chip U4 adopts a signal interface.
As shown in fig. 4, the switching circuit includes not less than two sets of joints, the number of sets of joints corresponding to the number of sets of probes of the needle bed one by one. The first metal pads in the joint group are respectively connected with the output ends of the constant current circuits through a first switch, and the second metal pads in the joint group are respectively connected with the input ends of the constant current circuits through a second switch. One of the joint groups is provided with a third switch, one end of the third switch is connected with the output end of the constant current circuit, and the other end of the third switch is connected with the second metal pad of the joint group. The main control circuit is connected with the first switch, the second switch and the third switch in an adapting way and is used for controlling the first switch, the second switch and the third switch to be opened or closed. The function of the switching circuit is controlled by the main control circuit, and the current of the constant current circuit is switched to probes at different positions of the battery serial formation system. The impedance voltage is formed by passing an overcurrent through a connection wire or piece at different locations in the battery serial formation system.
As shown in fig. 1, in this embodiment, there are n connector groups, and the first switch, the second switch and the third switch are all relay switches. The relay switch R1A, the relay switch R1B of the 1 st joint group, the relay switch R2A, the relay switches R2B and … … of the 2 nd joint group, the relay switch RnA of the nth joint group and the relay switch RnB. The switch of the relay switch R1C is located in the first joint group. The first metal pad of the 1 st joint group is connected with the metal probe 1A of the needle bed, the second metal pad of the 1 st joint group is connected with the metal probe 1B of the needle bed, the first metal pad of the 2 nd joint group is connected with the metal probe 2A of the needle bed, the second metal pad of the 2 nd joint group is connected with the metal probe 2B of the needle bed, … …, the first metal pad of the nth joint group is connected with the metal probe nA of the needle bed, and the second metal pad of the nth joint group is connected with the metal probe nB of the needle bed. As shown IN fig. 4, one ends of the coils of the relays R1A, R2A, … …, rnA, R1B, R2B, … …, rnA and R1C are all connected to VDD, the other ends of the coils of the relays are all connected to an OUT port of the relay control chip U5, and the IN port of the relay control chip U5 is all connected to a GPIO pin of the chip U4, IN this embodiment, the 44-56 pins and 31-39 pins of the chip U4 are GPIO pins. The two ends of the coils of the relay R1A, the relays R2A and … …, the relay RnA, the relay R1B, the relays R2B and … …, the relay RnA and the relay R1C are respectively connected with diodes. In this embodiment, the model of the control chip U5 is ULN2803.
In this embodiment, as shown in fig. 2, the constant current circuit includes a current positive port, a current negative port, an operational amplifier U1, and an operational amplifier U2. The current positive port is connected with VDD, the current positive port is the output end of the constant current circuit, and the current negative port inputs the current which is subjected to voltage drop by the corresponding probe. The inverting input end of the operational amplifier U1 is connected with one end of a resistor R4, the other end of the resistor R4 is grounded, the non-inverting input end of the operational amplifier U1 is respectively connected with one ends of a resistor R7 and a resistor R9, the other end of the resistor R9 is grounded, the other end of the resistor R7 is respectively connected with one end of a resistor R8 and the source electrode of an NMOS tube Q1, and the other end of the resistor R8 is grounded. The output end of the operational amplifier U1 is respectively connected with one ends of a resistor R5 and a resistor R1, the other end of the resistor R1 is connected with the reverse input end of the operational amplifier U1, the other end of the resistor R5 is respectively connected with one end of a resistor R3, one end of a resistor R2 and the reverse input end of the operational amplifier U2, the other end of the resistor R3 inputs a current given signal, and the other end of the resistor R2 is connected with-VCC. The non-inverting input end of the operational amplifier U2 is grounded, the output end of the operational amplifier U2 is connected with one end of a capacitor C1 and one end of a resistor R6 respectively, the other end of the capacitor C1 is connected with the inverting input end of the operational amplifier U2, the other end of the resistor R6 is connected with the grid electrode of an NMOS tube Q1, and the drain electrode of the NMOS tube Q1 is connected with the negative current port. The constant current circuit is composed of a MOS tube, an operational amplifier and a resistor capacitor. The current given signal of the main control circuit is received, and the current output from the positive current and the current return from the negative current are controlled through the operational amplifier and the MOS tube, so that the purpose of outputting a constant current is achieved.
In this embodiment, as shown in fig. 3, the sampling circuit includes an operational amplifier U3, an inverting input terminal of the operational amplifier U3 is connected to one end of a resistor R11, the other end of the resistor R11 is connected to a current positive port of the constant current circuit, an in-phase input terminal of the operational amplifier U3 is connected to one end of a capacitor C2, one end of a resistor R14 and one end of a resistor R13 respectively, the other end of the capacitor C2 and the other end of the resistor R14 are grounded, a current negative port of the other end of the resistor R13 is connected to a constant current circuit, an output terminal of the operational amplifier U3 is connected to one end of a capacitor C4, one end of a resistor R10 and one end of a resistor R20 respectively, the other ends of the capacitor C4 and the resistor R10 are connected to the inverting input terminal of the operational amplifier U3, the other end of the resistor R20 is connected to a 14 pin of the chip U4, and one end of the resistor R20 is connected to one end of the capacitor C10, and the other end of the capacitor C10 is grounded. The sampling circuit is composed of an operational amplifier and a resistor capacitor, and the principle of the sampling circuit is that a differential amplifying circuit samples the voltage of a current loop, amplifies signals according to the proportion of R10/R11=R14/R13, and sends the amplified signals to a main control circuit through a sampling signal interface for calculation and judgment.
During detection, when K1A and K1B of a bypass control module 1 of the battery serial formation system are closed, a main control circuit controls R1A and R1B of a switching circuit to be closed, then a main control circuit controls a constant current circuit to output constant current, the constant current forms a loop through L1A-K1B-K1A-L1B in FIG. 1, a sampling circuit can sample voltage drop formed by impedance after current flows through the current loop, and the main control circuit calculates and judges the voltage after amplification, so that disconnection detection of L1A and L1B of the battery serial formation system is realized. Note that the closing of the K1A, K B and the like of the bypass control module of the battery serial formation system is controlled by the battery serial formation system software, or is manually completed, or a disconnection detection circuit of the battery serial formation system is integrated into the battery serial formation system software in a communication, switching value and other modes, and all control processes are realized through centralized regulation and control of the software. The devices such as K1A, K B of the bypass control module shown in fig. 1 are not limited to mechanical switching devices such as relays and contactors, but also include electronic switching devices such as MOSFETs, transistors, IGBTs, SSRs, and thyristors.
As shown in FIG. 1, when R1C, K2B, R A is closed and other open, the current of the constant current circuit passes through R1C-L1B-L1C-K2B-L2A, so that the disconnection detection of L1C-K2B-L2A and a metal probe connected with the same is realized. Similarly, as shown in fig. 1, when R1C, K2A, R B is closed and the other is opened, the current of the constant current circuit flows through R1C-L1B-L1C-K2A-L2B-R2B, thereby further realizing the disconnection detection of K2A-L2B and the metal probe connected thereto. Similarly, as shown in fig. 1, when R1C, K2A, K3B, R a is closed and the other is opened, the disconnection detection of L2C, K3B, L a and the metal probe connected thereto can be further realized. Similarly, as shown in fig. 1, when R1C, K2A, K3A, R B is closed, other openings can further realize the disconnection detection of L2C, K3A, L B and the metal probe connected thereto. … …. Similarly, the logic continues to execute, and the broken wire detection of the connecting wires or connecting pieces of other bypass modules and needle beds, metal probes and the like can be realized.
Claims (5)
1. A broken line detection circuit of a battery serial formation system is characterized by comprising a main control circuit, a constant current circuit, a switching circuit and a sampling circuit; the main control circuit is connected with the switching circuit and the sampling circuit in an adaptive manner, the constant current circuit is connected with the switching circuit in an adaptive manner, and the sampling circuit is connected with the constant current circuit in an adaptive manner; the output end of the constant current circuit outputs constant current; the switching circuit is adaptively connected with probes of the battery serial formation system, and is used for switching the current of the constant current circuit to probes at different positions of the battery serial formation system according to the instruction of the main control circuit, so that the constant current of the constant current circuit forms voltage drop through the corresponding probes; the sampling circuit is used for sampling and comparing the constant current of the constant current circuit and the current after voltage drop is formed, and sending the comparison result to the main control circuit.
2. The disconnection detecting circuit of a battery serial formation system according to claim 1, wherein the switching circuit includes not less than two joint groups, the number of the joint groups being in one-to-one correspondence with the number of the probe groups of the needle bed; the first metal pads in the joint group are respectively connected with the output end of the constant current circuit through a first switch, and the second metal pads in the joint group are respectively connected with the input end of the constant current circuit through a second switch; one of the joint groups is provided with a third switch, one end of the third switch is connected with the output end of the constant current circuit, and the other end of the third switch is connected with a second metal pad of the joint group; the main control circuit is connected with the first switch, the second switch and the third switch in an adapting way and is used for controlling the opening or closing of the first switch, the second switch and the third switch.
3. The broken wire detection circuit of the battery serial formation system according to claim 1, wherein the constant current circuit contains a current positive port, a current negative port, an operational amplifier U1 and an operational amplifier U2; the current positive port is connected with VDD, the current positive port is the output end of the constant current circuit, and the current negative port inputs the current after voltage drop is formed by the corresponding probe; the inverting input end of the operational amplifier U1 is connected with one end of a resistor R4, the other end of the resistor R4 is grounded, the non-inverting input end of the operational amplifier U1 is respectively connected with one ends of a resistor R7 and a resistor R9, the other end of the resistor R9 is grounded, the other end of the resistor R7 is respectively connected with one end of a resistor R8 and the source electrode of an NMOS tube Q1, and the other end of the resistor R8 is grounded; the output end of the operational amplifier U1 is respectively connected with one ends of a resistor R5 and a resistor R1, the other end of the resistor R1 is connected with the reverse input end of the operational amplifier U1, the other end of the resistor R5 is respectively connected with one end of a resistor R3, one end of a resistor R2 and the reverse input end of the operational amplifier U2, the other end of the resistor R3 is adaptively connected with a main control circuit, the main control circuit sends a current given signal to the resistor R3, and the other end of the resistor R2 is connected with-VCC; the non-inverting input end of the operational amplifier U2 is grounded, the output end of the operational amplifier U2 is connected with one end of a capacitor C1 and one end of a resistor R6 respectively, the other end of the capacitor C1 is connected with the inverting input end of the operational amplifier U2, the other end of the resistor R6 is connected with the grid electrode of an NMOS tube Q1, and the drain electrode of the NMOS tube Q1 is connected with the current negative end port.
4. The broken line detection circuit of the battery serial formation system according to claim 1, wherein the sampling circuit comprises an operational amplifier U3, an inverting input end of the operational amplifier U3 is connected with one end of a resistor R11, the other end of the resistor R11 inputs a current which is subjected to voltage drop through a corresponding probe, a non-inverting input end of the operational amplifier U3 is respectively connected with one end of a capacitor C2, one end of a resistor R14 and one end of a resistor R13, the other end of the capacitor C2 and the other end of the resistor R14 are grounded, and the other end of the resistor R13 inputs a constant current; the output end of the operational amplifier U3 is respectively connected with one end of the capacitor C4, one end of the resistor R10 and one end of the resistor R20, the other ends of the capacitor C4 and the resistor R10 are both connected with the inverting input end of the operational amplifier U3, the other end of the resistor R20 is connected with a sampling signal interface of the main control circuit, one end of the resistor R20 connected with the main control circuit is connected with one end of the capacitor C10, and the other end of the capacitor C10 is grounded.
5. The circuit for detecting disconnection of a battery serial formation system according to any one of claims 1 to 4, wherein the main control circuit comprises a chip U4 of model TMS320F 28030.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321933587.2U CN220584379U (en) | 2023-07-21 | 2023-07-21 | Broken wire detection circuit of battery serial formation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321933587.2U CN220584379U (en) | 2023-07-21 | 2023-07-21 | Broken wire detection circuit of battery serial formation system |
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| Publication Number | Publication Date |
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| CN220584379U true CN220584379U (en) | 2024-03-12 |
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| CN202321933587.2U Active CN220584379U (en) | 2023-07-21 | 2023-07-21 | Broken wire detection circuit of battery serial formation system |
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2023
- 2023-07-21 CN CN202321933587.2U patent/CN220584379U/en active Active
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