CN216696443U - Electricity core acquisition circuit - Google Patents
Electricity core acquisition circuit Download PDFInfo
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- CN216696443U CN216696443U CN202123059797.7U CN202123059797U CN216696443U CN 216696443 U CN216696443 U CN 216696443U CN 202123059797 U CN202123059797 U CN 202123059797U CN 216696443 U CN216696443 U CN 216696443U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The application provides a battery core acquisition circuit for gather the electric core data of first battery module, first battery module includes series connection's a plurality of battery monomer, the circuit includes: the acquisition chip is provided with a plurality of acquisition channels, each acquisition channel is connected to a corresponding battery monomer in the plurality of battery monomers, the target power supply, the first connecting end of the target power supply is connected to the first power supply connecting end of the acquisition chip, and the second connecting end of the target power supply is connected to the second power supply connecting end of the acquisition chip so as to supply power to the acquisition chip. The target power supply is connected to the two ends of the acquisition chip, so that the problem that the acquisition chip is damaged due to the disconnection sequence of the connecting wires between the acquisition chip and the battery pack detection point is solved, the acquisition chip is protected, and the effect that the acquisition chip is damaged due to disconnection operation is avoided.
Description
Technical Field
The application relates to the technical field of battery detection, in particular to a battery cell acquisition circuit.
Background
At present, an electric automobile becomes a common vehicle for people, a battery of the electric automobile is an important component of the electric automobile, the detection of battery data of the electric automobile is very important, and the detection data is mistakenly damaged greatly and even causes great risk to personnel on the automobile. Therefore, in the prior art, monitoring data such as temperature, voltage, current and the like of the battery pack by adopting A Front End (AFE) plays an important role in the safety of the battery pack of the electric vehicle.
However, when the AFE detects a problem in the detection data of the battery pack, and the inspector verifies and detects the AFE and the battery pack, the problem of the disconnection sequence of the connecting line between the AFE and the detection point of the battery pack often causes a large potential difference in the potentials at the two ends of the electrical core data acquisition chip in the AFE, and further causes the electrical core data acquisition chip in the AFE to be damaged.
SUMMERY OF THE UTILITY MODEL
In view of this, an object of the present application is to provide an electrical core acquisition circuit, which can achieve an effect of avoiding damage to an AFE electrical core data acquisition chip by connecting a target power supply to two ends of an AFE.
The embodiment of the application provides a battery core acquisition circuit for gather the electric core data of first battery module, first battery module includes series connection's a plurality of battery monomer, battery core acquisition circuit includes: the acquisition chip is provided with a plurality of acquisition channels, each acquisition channel is connected to a corresponding battery monomer in the plurality of battery monomers, the target power supply, the first connecting end of the target power supply is connected to the first power supply connecting end of the acquisition chip, and the second connecting end of the target power supply is connected to the second power supply connecting end of the acquisition chip so as to supply power to the acquisition chip.
Optionally, the target power source is a first battery module, so that the first battery module supplies power to the acquisition chip.
Optionally, the battery cell acquisition circuit is applied to an electric vehicle, the electric vehicle includes a plurality of battery modules for providing driving force for the electric vehicle, the plurality of battery modules include a first battery module and at least one second battery module, wherein the target power supply is a target second battery module in the at least one second battery module, so that the acquisition chip is powered by the target second battery module.
Optionally, the battery cell acquisition circuit is applied to an electric vehicle, the electric vehicle includes a vehicle-mounted power supply, the target power supply is the vehicle-mounted power supply, and the acquisition chip is powered by the vehicle-mounted power supply.
Optionally, the target power supply includes a first power supply, a second power supply and a power supply selection switch, wherein a common terminal of the power supply selection switch is connected to one of the first power supply connection terminal and the second power supply connection terminal of the acquisition chip, a first selection connection terminal of the power supply selection switch is connected to the first connection terminal of the first power supply, a second connection terminal of the first power supply is connected to the other of the first power supply connection terminal and the second power supply connection terminal of the acquisition chip, a second selection connection terminal of the power supply selection switch is connected to the first connection terminal of the second power supply, and a second connection terminal of the second power supply is connected to the other power supply connection terminal.
Optionally, the cell acquisition circuit is applied to an electric vehicle, the electric vehicle includes a plurality of battery modules for providing driving force for the electric vehicle, the plurality of battery modules includes a first battery module and at least one second battery module, wherein the first power source is a target second battery module in the first battery module or the at least one second battery module, the cell acquisition circuit further includes a first dc converter, a first connection end of an input side of the first dc converter is connected to a first connection end of the first power source, and a second connection end of the input side of the first dc converter is connected to a second connection end of the first power source; the first connection terminal of the output side of the first dc converter is connected to the first selection connection terminal to the power selection switch, and the second connection terminal of the output side of the first dc converter is connected to the other power connection terminal.
Optionally, the cell acquisition circuit is applied to an electric vehicle, where the electric vehicle includes a vehicle-mounted power supply, the second power supply is a vehicle-mounted power supply, the cell acquisition circuit further includes a second dc converter, a first connection end of an input side of the second dc converter is connected to a first connection end of the second power supply, and a second connection end of the input side of the second dc converter is connected to a second connection end of the second power supply; the first connection terminal of the output side of the second dc converter is connected to the second selection connection terminal of the power selection switch, and the second connection terminal of the output side of the second dc converter is connected to the other power connection terminal.
Optionally, the first connection end of the first power supply is an anode connection end of the first power supply, and the second connection end of the first power supply is a cathode connection end of the first power supply, where the cell acquisition circuit further includes a filter and a voltage dividing resistor, a first end of the voltage dividing resistor is connected to the anode connection end of the first power supply, a second end of the voltage dividing resistor is connected to the first end of the filter, and a second end of the filter is connected to the first connection end of the input side of the first dc converter.
Optionally, the cell acquisition circuit further includes: at least one temperature sensor arranges the corresponding position department in first battery module respectively for gather the electric core temperature value of each position department.
Optionally, the battery cell acquisition circuit is applied to an electric vehicle, and the electric vehicle includes a battery management system, wherein the acquisition chip further includes a fault output interface and a communication interface, which are respectively connected to the battery management system.
The electric core acquisition circuit that this application embodiment provided, through connect a target power supply at acquisition chip both ends, supply power for acquisition chip through target power supply, the acquisition chip is supplied power by battery package check point to having solved that exists among the prior art, because the disconnection order problem to the connecting wire between acquisition chip and the battery package check point, the great potential difference appears in the electric potential that leads to electric core data acquisition chip both ends in the acquisition chip, and then lead to acquisition chip to appear the problem that damages, reach the protection acquisition chip, avoid the disconnection operation to lead to the effect that acquisition chip damaged.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic diagram of a first cell acquisition circuit provided in an embodiment of the present application;
fig. 2 is a schematic diagram of a second cell acquisition circuit provided in an embodiment of the present application;
fig. 3 is a schematic diagram of a third battery cell acquisition circuit provided in an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. Every other embodiment that can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present application falls within the protection scope of the present application.
First, an application scenario to which the present application is applicable will be described. The application can be applied to the field of detecting the battery pack of the electric automobile.
Research shows that when the detection data of the AFE to the battery pack is in a problem, detection personnel verify and detect the AFE and the battery pack, the electric potentials at two ends of an electric core data acquisition chip in the AFE are often greatly different in potential due to the problem of disconnection sequence of a connecting line between the AFE and a detection point of the battery pack, and then the electric core data acquisition chip in the AFE is damaged.
Based on this, this application embodiment provides an electricity core acquisition circuit to reach protection AFE electricity core data detection chip, avoid the disconnection of detection connecting wire to lead to the effect that AFE electricity core data acquisition chip damaged.
Referring to fig. 1, fig. 1 is a schematic diagram of a first battery cell acquisition circuit according to an embodiment of the present disclosure. As shown in fig. 1, the cell acquisition circuit 100 provided in the embodiment of the present application is configured to acquire cell data of a first battery module 103, where the first battery module 103 includes a plurality of battery cells 1031 connected in series, and the cell acquisition circuit 100 includes a target power source 101 and an acquisition chip 102.
Specifically, the target power supply 101 includes a first connection end a and a second connection end B; the first battery module 103 includes a plurality of battery cells connected in series; the acquisition chip 102 includes a plurality of acquisition channels, each of which is connected to a corresponding one of the plurality of battery cells.
It should be noted that the plurality of acquisition channels of the acquisition chip 102 are correspondingly connected to the plurality of battery cells, and are used for acquiring data such as current and voltage of each battery cell.
As shown in fig. 1, the first connection terminal C of the target power supply 101 is connected to the first power connection terminal a of the acquisition chip 102, and the second connection terminal D of the target power supply 101 is connected to the second power connection terminal B of the acquisition chip 102 to supply power to the acquisition chip 102.
For example, the first connection terminal C of the target power source 101 may be a positive electrode of the target power source 101, and the second connection terminal D may be a negative electrode of the target power source 101; the first power connection end a of the acquisition chip 102 may be a positive end of the acquisition chip 102, and the second power connection end B of the acquisition chip 102 may be a negative end of the acquisition chip 102.
The positive pole of the target power supply 101 is connected with the positive pole end of the acquisition chip 102, and the negative pole of the target power supply 101 is connected with the negative pole end of the acquisition chip 102, so that the target power supply 101 can provide necessary direct current power supply for the acquisition chip 102 to supply power to the acquisition chip 102, and is not affected by the disconnection sequence of the connecting lines between the detection points of the battery pack, and can stably supply power to the acquisition chip 102.
In another embodiment, the target power source may be a first battery module, so that the first battery module supplies power to the acquisition chip.
Specifically, when the first battery module is used as a target power supply to supply power to the acquisition chip, the first connection end of the battery monomer at the head end of the plurality of battery monomers connected in series in the first battery module, that is, the positive end of the battery monomer at the head end is connected to the first power supply terminal of the acquisition chip; the second connection end of the battery cell at the tail end of the plurality of battery cells connected in series in the first battery module, that is, the negative electrode end of the battery cell at the tail end, is connected to the second power supply terminal of the acquisition chip.
Therefore, the first battery module can be used as a target power supply to supply power for the acquisition chip, is not influenced by the disconnection sequence of the connecting lines between the detection points of the battery pack, and can stably supply power for the acquisition chip.
In a preferred embodiment, the battery cell acquisition circuit is applied to an electric vehicle, and the electric vehicle comprises a plurality of battery modules so as to provide driving power for the electric vehicle.
The plurality of battery modules comprise a first battery module and a plurality of second battery modules, any one of the plurality of second battery modules can be selected as a target second battery module, and the target second battery module is used as a target power supply to supply power for the acquisition chip.
Specifically, the first connection end of the target second battery module, that is, the positive electrode end of the target second battery module, may be connected to the first power connection end of the acquisition chip as the first connection end of the target power supply; the second connection end of the target second battery module, namely the negative electrode end of the target second battery module, can be used as the second connection end of the target power supply to be connected to the second power supply connection end of the acquisition chip.
Therefore, the target second battery module can be used as a target power supply to supply power for the acquisition chip, is not influenced by the disconnection sequence of the connecting lines between the battery pack detection points, and can stably supply power for the acquisition chip.
In a preferred embodiment, the battery cell acquisition circuit is applied to an electric vehicle, and a vehicle-mounted power supply can be set in the electric vehicle as a target power supply to supply power to the acquisition chip by the vehicle-mounted power supply.
For example, the vehicle-mounted power supply may be a direct-current power supply, and the first connection end of the direct-current power supply, that is, the positive end of the direct-current power supply, may be connected to the first power supply connection end of the acquisition chip as the first connection end of the target power supply; the second connection end of the direct current power supply, namely the negative electrode end of the direct current power supply, can be used as the second connection end of the target power supply to be connected to the second power supply connection end of the acquisition chip.
Therefore, the vehicle-mounted power supply can be used as a target power supply to supply power for the acquisition chip, is not influenced by the disconnection sequence of the connecting lines between the detection points of the battery pack, and can stably supply power for the acquisition chip.
The electric core acquisition circuit that this application embodiment provided, through connect a target power supply at acquisition chip both ends, supply power for acquisition chip through target power supply, the acquisition chip is supplied power by battery package check point to having solved that exists among the prior art, because the disconnection order problem to the connecting wire between acquisition chip and the battery package check point, the great potential difference appears in the electric potential that leads to electric core data acquisition chip both ends in the acquisition chip, and then lead to acquisition chip to appear the problem that damages, reach the protection acquisition chip, avoid the disconnection operation to lead to the effect that acquisition chip damaged.
Referring to fig. 2, fig. 2 is a schematic diagram of a second battery cell acquisition circuit according to an embodiment of the present disclosure. As shown in fig. 2, a second cell collecting circuit 200 provided in this embodiment of the present application is configured to collect cell data of a first battery module 103, where the first battery module 103 includes a plurality of battery cells 1031 connected in series, and the cell collecting circuit 200 includes: the power supply comprises an acquisition chip 102, a power supply selection switch 201, a first power supply 202 and a second power supply 203.
As shown in fig. 2, a common terminal of the power selection switch 201 is connected to a first power connection terminal of the acquisition chip 102, a first selection connection terminal of the power selection switch 201 is connected to a first connection terminal of a first power source 202, and a second selection connection terminal of the power selection switch 201 is connected to a first connection terminal of a second power source 203.
Preferably, the common terminal of the power selection switch 201 may further be connected to the second power connection terminal of the acquisition chip 102, the first selection connection terminal of the power selection switch 201 is connected to the second connection terminal of the first power source 202, and the second selection connection terminal of the power selection switch 201 is connected to the second connection terminal of the second power source 203, so that the same technical effects as the connection mode shown in fig. 2 may be achieved.
The first power source 202 may be any battery module in the electric vehicle, that is, the first power source 202 is a target second battery module in the first battery module or the at least one second battery module; the second power source 203 may be an in-vehicle power source.
Here, the vehicle-mounted power supply is used as an auxiliary power supply of the first power supply 202, and when the electric quantity of the first power supply 202 is insufficient and sufficient electric energy cannot be provided for the acquisition chip 102, the vehicle-mounted power supply can be switched to the second power supply 203 to supply power for the acquisition chip 102, so that the situation that the acquisition chip 102 cannot work due to the reduction of the electric quantity of the battery module of the electric vehicle can be avoided.
The power selection switch 201 may be controlled by a chip or manually. However, it is necessary to ensure that the two power connection selection terminals of the power selection switch 201 are connected to at least one power connection terminal, so as to ensure stable power supply of the acquisition chip 102.
Therefore, the first power supply 202 and the second power supply 203 can supply power to the acquisition chip 102 under the control of the power selection switch 201, and can be switched to another power supply to supply power to the acquisition chip through the power selection switch 201 when the electric energy of one power supply is insufficient, so that the acquisition chip 102 is stably supplied with power.
The electric core acquisition circuit that this application embodiment provided, through connect first power at acquisition chip both ends, second power and power selection switch, supply power for acquisition chip through first power or second power, the battery package inspection point that exists among the prior art supplies power to acquisition chip has been solved, because the disconnection order problem to the connecting wire between acquisition chip and the battery package inspection point, the great potential difference appears in the electric potential that leads to electric core data acquisition chip both ends in the acquisition chip, and then lead to acquisition chip to appear the problem that damages, reach the protection acquisition chip, avoid the disconnection operation to lead to the effect that acquisition chip damaged. Meanwhile, the two power supplies can be switched according to requirements, and the power supply stability of the acquisition chip is guaranteed.
Referring to fig. 3, fig. 3 is a schematic diagram of a third battery cell acquisition circuit according to an embodiment of the present disclosure. As shown in fig. 3, a third cell acquisition circuit 300 provided in this embodiment of the present application is configured to acquire cell data of a first battery module 103, where the first battery module 103 includes a plurality of battery cells 1031 connected in series, and the cell acquisition circuit 300 includes: the power supply circuit comprises an acquisition chip 102, a power supply selection switch 201, a first power supply 202, a second power supply 203, a first direct current converter 301, a second direct current converter 302, a filter 303 and a voltage division resistor 304.
As shown in fig. 3, a first connection terminal of the first power source 202, that is, a positive connection terminal of the first power source 202, is connected to a first terminal of the voltage dividing resistor 304, a second terminal of the voltage dividing resistor 304 is connected to a first terminal of the filter 303, a second terminal of the filter 303 is connected to a first connection terminal of an input side of the first dc converter 301, a second connection terminal of the first power source 202, that is, a negative connection terminal of the first power source 202, is connected to a second input terminal of the first dc converter 301, a first connection terminal of an output side of the first dc converter 301 is connected to a first selection connection terminal of the power selection switch 201, and a second connection terminal of an output side of the first dc converter 301 is connected to a second power source connection terminal of the acquisition chip 102.
The voltage of the first power supply 202 can be protected by the voltage dividing resistor 304 through its resistance value, the filter 303 can ensure the stability of the output current of the first power supply 202, and then the voltage output by the first power supply is converted to the voltage value required by the acquisition chip 102 by the first dc converter 301 to supply power to the acquisition chip 102. Illustratively, the first DC converter 301 may be a DC/DC converter.
Therefore, the voltage and current generated in the running process of the electric automobile can be divided and rectified by the voltage dividing resistor 304 and the filter 303 to output stable voltage and current, and the voltage of the first power supply is adjusted by the voltage of the first direct current converter 301, so that the electric energy change of the first power supply cannot be influenced by the charging and the generating of the battery of the electric automobile, and the voltage output to the acquisition chip 102 is unstable.
As shown in fig. 3, the first connection terminal of the second power source 203 is connected to the first connection terminal of the input side of the second dc converter 302, the second connection terminal of the second power source 203 is connected to the second connection terminal of the input side of the second dc converter 302, the first connection terminal of the output side of the second dc converter 302 is connected to the second connection selection terminal of the power selection switch 201, and the second connection terminal of the output side of the second dc converter 302 is connected to the second power connection terminal of the acquisition chip 102.
The second power supply may be a 12 v vehicle-mounted power supply, and the dc voltage passing through the second dc converter 302 is converted into the power for the acquisition chip 102. Illustratively, the second DC converter 302 may be a DC/DC converter.
Like this, when first power 202 electric quantity was low excessively, power selection switch 201 can be connected to the second and select the end, is supplied power to gathering chip 102 by second power 203, has guaranteed all can be for gathering chip 102 power supply under any circumstance, makes and gathers the chip and can normally work, has guaranteed the stability to electric automobile battery module data acquisition.
Optionally, still include a plurality of temperature sensor (not shown in the figure) in the electric core acquisition circuit, a plurality of temperature sensor set up corresponding position department in first battery module for gather the electric core temperature value of each position department. And temperature data is input to the acquisition chip through the temperature acquisition input end of the acquisition chip.
Optionally, the battery cell acquisition circuit further includes a fault output interface (not shown in the figure) and a communication interface (not shown in the figure), where the fault output interface and the communication interface are both connected to an input interface corresponding to the battery management system, and transmit various data detected by the acquisition chip to the battery management system, so that the battery management system can specifically analyze the condition of the battery.
The electric core acquisition circuit that this application embodiment provided, through connect first power at acquisition chip both ends, second power and power selection switch, supply power for acquisition chip through first power or second power, the battery package inspection point that exists among the prior art supplies power to acquisition chip has been solved, because the disconnection order problem to the connecting wire between acquisition chip and the battery package inspection point, the great potential difference appears in the electric potential that leads to electric core data acquisition chip both ends in the acquisition chip, and then lead to acquisition chip to appear the problem that damages, reach the protection acquisition chip, avoid the disconnection operation to lead to the effect that acquisition chip damaged.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the circuit described above may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed circuit may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of 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 of devices or units through some communication interfaces, and may be in an electrical, mechanical 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 network 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 application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used for illustrating the technical solutions of the present application, but not limiting the same, and the scope of the present application is not limited thereto, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still make modifications or changes to the embodiments described in the foregoing embodiments, or make equivalent substitutions for some features, within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the exemplary embodiments of the present application, and are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides an electricity core acquisition circuit for gather the electric core data of first battery module, first battery module includes series connection's a plurality of battery monomer, its characterized in that, electricity core acquisition circuit includes:
an acquisition chip having a plurality of acquisition channels, each acquisition channel connected to a corresponding one of the plurality of battery cells,
and the first connecting end of the target power supply is connected to the first power supply connecting end of the acquisition chip, and the second connecting end of the target power supply is connected to the second power supply connecting end of the acquisition chip so as to supply power for the acquisition chip.
2. The cell acquisition circuit according to claim 1, wherein the target power source is a first battery module, so that the acquisition chip is powered by the first battery module.
3. The cell acquisition circuit of claim 1, wherein the cell acquisition circuit is applied to an electric vehicle, the electric vehicle comprises a plurality of battery modules for providing driving force for the electric vehicle, the plurality of battery modules comprises a first battery module and at least one second battery module,
the target power supply is a target second battery module in the at least one second battery module, and the target second battery module supplies power to the acquisition chip.
4. The cell acquisition circuit according to claim 1, wherein the cell acquisition circuit is applied to an electric vehicle, the electric vehicle includes an on-board power supply, and the target power supply is the on-board power supply, so that the acquisition chip is powered by the on-board power supply.
5. The cell acquisition circuit of claim 1, wherein the target power source comprises a first power source, a second power source, and a power selection switch,
wherein, the common end of the power selection switch is connected to one of the first power connection end and the second power connection end of the acquisition chip, the first selection connection end of the power selection switch is connected to the first connection end of the first power supply, the second connection end of the first power supply is connected to the other one of the first power connection end and the second power connection end of the acquisition chip,
and a second selection connection end of the power selection switch is connected to a first connection end of a second power supply, and a second connection end of the second power supply is connected to the other power supply connection end.
6. The cell acquisition circuit of claim 5, wherein the cell acquisition circuit is applied to an electric vehicle, the electric vehicle comprises a plurality of battery modules for providing driving force for the electric vehicle, the plurality of battery modules comprises a first battery module and at least one second battery module,
wherein the first power source is a first battery module or a target second battery module of the at least one second battery module,
the cell acquisition circuit further comprises a first direct current converter,
a first connection terminal of an input side of the first direct current converter is connected to a first connection terminal of a first power supply, and a second connection terminal of the input side of the first direct current converter is connected to a second connection terminal of the first power supply;
the first connection terminal of the output side of the first dc converter is connected to the first selection connection terminal to the power selection switch, and the second connection terminal of the output side of the first dc converter is connected to the other power connection terminal.
7. The cell acquisition circuit according to claim 5 or 6, wherein the cell acquisition circuit is applied to an electric vehicle, the electric vehicle comprises an onboard power supply, the second power supply is an onboard power supply,
wherein the cell acquisition circuit further comprises a second direct current converter,
the first connecting end of the input side of the second direct current converter is connected to the first connecting end of the second power supply, and the second connecting end of the input side of the second direct current converter is connected to the second connecting end of the second power supply;
the first connection terminal of the output side of the second dc converter is connected to the second selection connection terminal of the power selection switch, and the second connection terminal of the output side of the second dc converter is connected to the other power connection terminal.
8. The cell acquisition circuit of claim 6, wherein the first connection terminal of the first power supply is a positive connection terminal of the first power supply, the second connection terminal of the first power supply is a negative connection terminal of the first power supply,
wherein the battery cell acquisition circuit further comprises a filter and a voltage division resistor,
the first end of the divider resistor is connected to the positive connecting end of the first power supply, the second end of the divider resistor is connected to the first end of the filter, and the second end of the filter is connected to the first connecting end of the input side of the first direct current converter.
9. The cell acquisition circuit of claim 1, further comprising:
at least one temperature sensor arranges the corresponding position department in first battery module respectively for gather the electric core temperature value of each position department.
10. The cell acquisition circuit of claim 1, wherein the cell acquisition circuit is used in an electric vehicle, the electric vehicle including a battery management system,
the acquisition chip further comprises a fault output interface and a communication interface which are respectively connected to the battery management system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123059797.7U CN216696443U (en) | 2021-12-06 | 2021-12-06 | Electricity core acquisition circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123059797.7U CN216696443U (en) | 2021-12-06 | 2021-12-06 | Electricity core acquisition circuit |
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| Publication Number | Publication Date |
|---|---|
| CN216696443U true CN216696443U (en) | 2022-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123059797.7U Active CN216696443U (en) | 2021-12-06 | 2021-12-06 | Electricity core acquisition circuit |
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| CN (1) | CN216696443U (en) |
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2021
- 2021-12-06 CN CN202123059797.7U patent/CN216696443U/en active Active
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