CN106972594B - Improved circuit of battery management system - Google Patents
Improved circuit of battery management system Download PDFInfo
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- CN106972594B CN106972594B CN201710383613.1A CN201710383613A CN106972594B CN 106972594 B CN106972594 B CN 106972594B CN 201710383613 A CN201710383613 A CN 201710383613A CN 106972594 B CN106972594 B CN 106972594B
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- 230000001052 transient effect Effects 0.000 claims abstract description 15
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 230000003071 parasitic effect Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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- H02J7/0022—
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses an improved circuit of a battery management system, which comprises: the battery management main control module comprises a main control chip, a main loop relay for controlling charging and discharging of the rechargeable battery pack and an intermediate relay for controlling on-off of the main loop relay are arranged, a grounding pin of the main control chip is connected with a resistor R1 and a diode D3, and the resistor R1 is connected with the diode D3 in parallel and then grounded; an output pin of the main control chip is connected with a transient diode D2 to ensure that the main control chip is conducted to the ground in a forward direction, one end of the transient diode D2 is connected with the intermediate relay, and the other end of the transient diode D2 is grounded; the intermediate relay is connected with a diode D1 in parallel. The invention blocks the interference channel of the grounding end loop entering the main control chip, improves the high-frequency interference resistance of the battery management system, improves the working stability of the battery management system and avoids the misoperation of the relay.
Description
Technical Field
The invention relates to the technical field of battery management systems, in particular to an improved circuit of a battery management system.
Background
The battery management system has important monitoring and protecting functions on the power battery pack and is widely applied to the field of new energy such as electric automobiles, energy storage power stations and the like.
As shown in fig. 1, a main circuit relay and an intermediate relay for controlling the on-off of the main circuit relay are installed on a main control module of the existing battery management system, and the existing battery management system has the following disadvantages: the relay may not be controlled by the main control chip to malfunction, which includes the following two kinds:
firstly, at control major loop relay break-make in-process, owing to can produce strong electromagnetic interference at control major loop relay break-make in-process, in the main loop relay disconnection moment, interfering signal gets into the chip along the B direction, and the C direction passes through the current direction of diode release coil energy for major loop relay coil during the major loop relay disconnection in the picture, because interfering signal's influence, can cause the relay to switch on repeatedly, break off, and not receive the control of master control chip.
During the normal operation of the system, the intermediate relay is in any state of connection or disconnection, and as the electromagnetic interference signal enters the main control chip along the direction A or B, the chip is disturbed, so that the chip changes the original determined state and generates misoperation.
Accordingly, there is a need in the art for improvements.
Disclosure of Invention
The embodiment of the invention aims to solve the technical problem that: an improved circuit for a battery management system is provided to solve the problems in the prior art.
According to an aspect of an embodiment of the present invention, an improved circuit of a battery management system is provided, which includes a battery management system circuit, the battery management system circuit includes a battery management main control module and a rechargeable battery pack, the battery management main control module includes a main control chip, and a main loop relay for controlling charging and discharging of the rechargeable battery pack and an intermediate relay for controlling on and off of the main loop relay are provided, a ground pin of the main control chip is connected to a resistor R1 and a diode D3, the resistor R1 is connected in parallel with the diode D3 and then grounded;
an output pin of the main control chip is connected with a transient diode D2 to ensure that the main control chip is conducted to the ground in a forward direction, one end of the transient diode D2 is connected with the intermediate relay, and the other end of the transient diode D2 is grounded;
the intermediate relay is connected with a diode D1 in parallel.
In another embodiment of the improved circuit based on the battery management system, the resistor R1 has a resistance of 10K ohms.
In another embodiment of the improved circuit for battery management system, the diode D3 is a reverse diode from the ground terminal to the main control chip, and the diode D3 is used to prevent the ground terminal from flowing current to the main control chip.
In another embodiment of the improved circuit based on the battery management system, the resistor R1 is used to release the energy stored in the parasitic inductor inside the diode D3, so as to improve the capability of the main control chip to resist high frequency interference.
Compared with the prior art, the invention has the following advantages:
based on the improved circuit of the battery management system provided by the above embodiment of the invention, the transient diode D2 is connected to the output pin of the main control chip, and the resistor R1 and the diode D3 are connected to the ground pin of the main control chip, so that the interference channel of the ground end loop entering the main control chip is blocked, the high-frequency interference resistance of the battery management system is improved, the working stability of the battery management system is improved, and the malfunction of the relay is avoided.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
The invention will be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:
fig. 1 is a circuit diagram of a prior art battery management system circuit.
Fig. 2 is a circuit diagram of a battery management system improvement circuit of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 2 is a circuit diagram of an improved circuit of a battery management system according to the present invention, and as shown in fig. 2, the improved circuit of the battery management system of this embodiment includes a circuit of the battery management system, the circuit of the battery management system includes a battery management main control module and a rechargeable battery pack, the battery management main control module includes a main control chip, and a main loop relay for controlling charging and discharging of the rechargeable battery pack and an intermediate relay for controlling on and off of the main loop relay are provided, a ground pin of the main control chip is connected to a resistor R1 and a diode D3, and the resistor R1 is connected in parallel with the diode D3 and then grounded;
an output pin of the main control chip is connected with a transient diode D2 to ensure that the main control chip is conducted to the ground in a forward direction, one end of the transient diode D2 is connected with the intermediate relay, and the other end of the transient diode D2 is grounded;
the intermediate relay is connected with a diode D1 in parallel.
The resistance value of the resistor R1 is 10K ohms.
The diode D3 is a reverse diode from the ground to the main control chip, and the diode D3 is used to prevent the ground from flowing current into the main control chip.
The resistor R1 is used for releasing energy stored in a parasitic inductor in the diode D3, and the capability of the main control chip for resisting high-frequency interference is improved.
The 16 th pin of the main control chip is connected with a transient diode D2, so that the forward impedance (E direction) of the main control chip to the ground is very small, and the normal use function of the main control chip is not influenced.
For the reverse loop (direction a) from the ground end loop to the 8 th pin of the main control chip, since the diode D3 is in a reverse state from the ground end to the main control chip, the diode D3 is in a blocking state, the resistance value of the resistor R1 is 10K ohms, so that the 8 th pin of the main control chip has a high input impedance in the direction a, an input channel of an interference signal entering the main control chip from the ground end loop is blocked, the resistor R1 is connected in parallel to two ends of the diode D3, energy stored in a parasitic inductor inside the diode D3 can be effectively released, and the capability of the system for resisting high-frequency interference is further improved.
The transient diode D2 shunts the interference signal entering the 16 th pin of the main control chip, and the anti-interference capability of the system is further improved.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts in the embodiments are referred to each other.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (4)
1. An improved circuit of a battery management system comprises a battery management system circuit, wherein the battery management system circuit comprises a battery management main control module and a rechargeable battery pack, the battery management main control module comprises a main control chip, and a main loop relay for controlling charging and discharging of the rechargeable battery pack and an intermediate relay for controlling on-off of the main loop relay are arranged, and the improved circuit is characterized in that a grounding pin of the main control chip is connected with a resistor R1 and a diode D3, and the resistor R1 is grounded after being connected with the diode D3 in parallel;
an output pin of the main control chip is connected with a transient diode D2 to ensure that the main control chip is conducted to the ground in a forward direction, one end of the transient diode D2 is connected with the intermediate relay, and the other end of the transient diode D2 is grounded;
the intermediate relay is connected with a diode D1 in parallel.
2. The battery management system improvement circuit according to claim 1, wherein said resistor R1 has a resistance of 10K ohms.
3. The improved circuit for battery management system as claimed in claim 1, wherein the diode D3 is a reverse diode from ground to the main control chip, and the diode D3 is used to prevent current from flowing from ground to the main control chip.
4. The improved circuit for battery management system as claimed in claim 1, wherein the resistor R1 is used to release the energy stored in the parasitic inductor inside the diode D3, so as to improve the capability of the main control chip to resist high frequency interference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710383613.1A CN106972594B (en) | 2017-05-26 | 2017-05-26 | Improved circuit of battery management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710383613.1A CN106972594B (en) | 2017-05-26 | 2017-05-26 | Improved circuit of battery management system |
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| Publication Number | Publication Date |
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| CN106972594A CN106972594A (en) | 2017-07-21 |
| CN106972594B true CN106972594B (en) | 2020-07-14 |
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| CN201710383613.1A Active CN106972594B (en) | 2017-05-26 | 2017-05-26 | Improved circuit of battery management system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097847A (en) * | 2011-03-28 | 2011-06-15 | 国电南瑞科技股份有限公司 | Shunt-wound rechargeable battery heavy constant current discharging device |
| CN205426976U (en) * | 2016-03-18 | 2016-08-03 | 上海奉天电子股份有限公司 | Anti -jamming circuit based on waveshape recognition |
| CN205901284U (en) * | 2016-07-07 | 2017-01-18 | 成都必控科技股份有限公司 | Surge inhibiting module with overcurrent protection |
-
2017
- 2017-05-26 CN CN201710383613.1A patent/CN106972594B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097847A (en) * | 2011-03-28 | 2011-06-15 | 国电南瑞科技股份有限公司 | Shunt-wound rechargeable battery heavy constant current discharging device |
| CN205426976U (en) * | 2016-03-18 | 2016-08-03 | 上海奉天电子股份有限公司 | Anti -jamming circuit based on waveshape recognition |
| CN205901284U (en) * | 2016-07-07 | 2017-01-18 | 成都必控科技股份有限公司 | Surge inhibiting module with overcurrent protection |
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| CN106972594A (en) | 2017-07-21 |
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| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Improved circuit of battery management system Effective date of registration: 20211208 Granted publication date: 20200714 Pledgee: Xiamen International Bank Co.,Ltd. Beijing Branch Pledgor: Kingeta Group Co.,Ltd. Registration number: Y2021990001159 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20221125 Granted publication date: 20200714 Pledgee: Xiamen International Bank Co.,Ltd. Beijing Branch Pledgor: Kingeta Group Co.,Ltd. Registration number: Y2021990001159 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Improved circuit of battery management system Effective date of registration: 20221125 Granted publication date: 20200714 Pledgee: Xiamen International Bank Co.,Ltd. Beijing Branch Pledgor: Kingeta Group Co.,Ltd. Registration number: Y2022110000330 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |