CN205283192U - Battery management system's power protection circuit - Google Patents
Battery management system's power protection circuit Download PDFInfo
- Publication number
- CN205283192U CN205283192U CN201521107667.8U CN201521107667U CN205283192U CN 205283192 U CN205283192 U CN 205283192U CN 201521107667 U CN201521107667 U CN 201521107667U CN 205283192 U CN205283192 U CN 205283192U
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- tvs pipe
- limiting
- tvs
- voltage limiting
- pressure limiting
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Abstract
The utility model relates to a battery management system's power protection circuit, including first voltage limiting TVS pipe DP1, current -limiting resistor R1 and second voltage limiting TVS pipe Z1, first voltage limiting TVS pipe DP1's negative pole is as the positive input terminal of protection circuit, the anodal negative pole input of regarding as the protection circuit, current -limiting resistor R1's the first voltage limiting TVS of termination pipe DP1's negative pole, another termination second voltage limiting TVS manages Z1's one end, the positive pole of second voltage limiting TVS pipe Z1's the first voltage limiting TVS of another termination pipe, node that second voltage limiting TVS pipe Z1 and current -limiting resistor R1 are connected is held as the positive output of protection circuit, manages node that DP1 the is connected cathode output as the protection circuit with first voltage limiting TVS. DP1 carries out the one -level voltage limiting through powerful first voltage limiting TVS pipe to second voltage limiting TVS pipe Z1 through powerful current -limiting resistor R1 and miniwatt carries out the second grade voltage limiting, prevents effectively that electrical power generating system from being burnt out by the high -voltage pulse signal, protects the power supply circuit of rear end, improves battery management system's reliability.
Description
Technical field
This utility model relates to battery management system technical field, is specifically related to the power protecting circuit of a kind of battery management system.
Background technology
Much countries of the current world are all promoting new-energy automobile. China is under the promotion of government's advantage policy, and new-energy automobile obtains quick development. And the battery of dynamical system is the core component of new-energy automobile, therefore the safety of batteries of electric automobile is most important for car load. Battery management system (BATTERYMANAGEMENTSYSTEM, BMS), it it is the important tie connecting vehicle mounted dynamic battery and electric automobile, its major function includes: battery physical parameter is monitored in real time, battery status is estimated, inline diagnosis and early warning, discharge and recharge and preliminary filling control, balanced management and heat management etc., therefore the reliability of battery management system (BMS) is directly connected to the safety that batteries of electric automobile is applied.
And in the reliability testing to battery management system (BMS), test including throw load pulse 5. Doing and can input high-voltage pulse signal in a flash to power supply when throw load pulse 5 is tested, this instantaneous pressure pulse signal burns out the DC/DC circuit in power supply most probably, so that power supply damages. Existing power protecting circuit is typically included in power input and connects a PTC, then bridges a TVS pipe at the positive and negative terminal of power supply again. Above-mentioned power protecting circuit may be only available for the power-supply system of 12V; then cannot realize when being applied to the power-supply system of more than 12V, in throw load pulse 5 test process, power supply is played protection; and this power protecting circuit also cannot be effectively prevented power-supply system and be burnt out by high-voltage pulse signal when practical application, protected effect is undesirable.
Utility model content
The purpose of this utility model is to overcome shortcomings and deficiencies of the prior art, it is provided that the power protecting circuit of a kind of battery management system, effectively prevents power-supply system from being burnt out by high-voltage pulse signal.
The purpose of this utility model is achieved through the following technical solutions:
A kind of power protecting circuit of battery management system, including the first pressure limiting TVS pipe DP1, current-limiting resistance R1 and the second pressure limiting TVS pipe Z1, the negative pole of described first pressure limiting TVS pipe DP1 is as the electrode input end of protection circuit, and positive pole is as the negative input of protection circuit; The negative pole of the one termination first pressure limiting TVS pipe DP1 of described current-limiting resistance R1, another terminates one end of the second pressure limiting TVS pipe Z1; Another of described second pressure limiting TVS pipe Z1 terminates the positive pole of the first pressure limiting TVS pipe; Described second pressure limiting TVS pipe Z1 and the current-limiting resistance R1 node being connected is as the cathode output end of protection circuit, with the first pressure limiting TVS pipe DP1 node being connected as the cathode output end protecting circuit.
Specifically, the reverse blanking voltage VWM of described first pressure limiting TVS pipe DP1 is 33V.
Specifically, described first pressure limiting TVS pipe DP1 is SM8S33CA.
Specifically, the reverse blanking voltage VWM of described second pressure limiting TVS pipe Z1 is 33V.
Specifically, described second pressure limiting TVS pipe Z1 is SMCJ33CAHE3.
Specifically, the resistance of described current-limiting resistance R1 is 10 ��.
Specifically, the power of described current-limiting resistance R1 is more than 10W.
This utility model includes advantages below and beneficial effect compared to existing technology:
(1) this utility model carries out one-level pressure limiting by powerful first pressure limiting TVS pipe DP1; and carry out two grades of pressure limitings by powerful current-limiting resistance R1 and low power second pressure limiting TVS pipe Z1; effectively prevent power-supply system from being burnt out by high-voltage pulse signal; the power circuit of protection rear end, is greatly improved the reliability of battery management system.
(2) it is 24V and following battery management system that the protection circuit that this utility model provides can be applicable to power supply.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the power protecting circuit of the battery management system in embodiment.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, this utility model is described in further detail, but embodiment of the present utility model is not limited to this.
Embodiment
As it is shown in figure 1, the power protecting circuit of a kind of battery management system, including the first pressure limiting TVS pipe DP1, current-limiting resistance R1 and the second pressure limiting TVS pipe Z1. The negative pole of described first pressure limiting TVS pipe DP1 is as the electrode input end of protection circuit, and positive pole is as the negative input of protection circuit. The negative pole of the one termination first pressure limiting TVS pipe DP1 of described current-limiting resistance R1, another terminates one end of the second pressure limiting TVS pipe Z1; Another of described second pressure limiting TVS pipe Z1 terminates the positive pole of the first pressure limiting TVS pipe; Described second pressure limiting TVS pipe Z1 and the current-limiting resistance R1 node being connected is as the cathode output end of protection circuit, with the first pressure limiting TVS pipe DP1 node being connected as the cathode output end protecting circuit.
Described first pressure limiting TVS pipe DP1 is high-power TVS pipe, and its reverse blanking voltage VWM is 33V. In the present embodiment, described first pressure limiting TVS pipe DP1 is SM8S33CA.
Described second pressure limiting TVS pipe Z1 is small-power TVS pipe, and its reverse blanking voltage VWM is 33V. In the present embodiment, described second pressure limiting TVS pipe Z1 is SMCJ33CAHE3.
Described current-limiting resistance R1 is high-power resistance, and its resistance is 10 ��, and power is more than 10W.
Battery management system carry out throw load pulse 5 test time, be input to protection circuit both positive and negative polarity input high-voltage pulse (may be up to 174V) after powerful first pressure limiting TVS pipe DP1 pressure limiting, the high-voltage pulse of input is limited in below 58V; Then through powerful current-limiting resistance R1 and low power second pressure limiting TVS pipe Z1 pressure limiting, export the DC/DC circuit to power supply from the both positive and negative polarity outfan of protection circuit after making voltage be down to below 45V, it is achieved the protection to the DC/DC circuit of power supply.
When practical application, protect the operation principle that power supply is realized protection by circuit to test with above-mentioned throw load pulse 5 when power supply is subject to the impact of high-voltage pulse, repeat no more herein.
Embodiment described above only have expressed embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to this utility model the scope of the claims. It should be pointed out that, for the person of ordinary skill of the art, without departing from the concept of the premise utility, it is also possible to make some deformation and improvement, these broadly fall into protection domain of the present utility model. Therefore, the protection domain of this utility model patent should be as the criterion with claims.
Claims (7)
1. the power protecting circuit of a battery management system, it is characterized in that, including: the first pressure limiting TVS pipe DP1, current-limiting resistance R1 and the second pressure limiting TVS pipe Z1, the negative pole of described first pressure limiting TVS pipe DP1 is as the electrode input end of protection circuit, and positive pole is as the negative input of protection circuit; The negative pole of the one termination first pressure limiting TVS pipe DP1 of described current-limiting resistance R1, another terminates one end of the second pressure limiting TVS pipe Z1; Another of described second pressure limiting TVS pipe Z1 terminates the positive pole of the first pressure limiting TVS pipe; Described second pressure limiting TVS pipe Z1 and the current-limiting resistance R1 node being connected is as the cathode output end of protection circuit, with the first pressure limiting TVS pipe DP1 node being connected as the cathode output end protecting circuit.
2. the power protecting circuit of battery management system according to claim 1, it is characterised in that: the reverse blanking voltage VWM of described first pressure limiting TVS pipe DP1 is 33V.
3. the power protecting circuit of battery management system according to claim 2, it is characterised in that: described first pressure limiting TVS pipe DP1 is SM8S33CA.
4. the power protecting circuit of battery management system according to claim 1, it is characterised in that: the reverse blanking voltage VWM of described second pressure limiting TVS pipe Z1 is 33V.
5. the power protecting circuit of battery management system according to claim 4, it is characterised in that: described second pressure limiting TVS pipe Z1 is SMCJ33CAHE3.
6. the power protecting circuit of battery management system according to claim 1, it is characterised in that: the resistance of described current-limiting resistance R1 is 10 ��.
7. the power protecting circuit of battery management system according to claim 6, it is characterised in that: the power of described current-limiting resistance R1 is more than 10W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521107667.8U CN205283192U (en) | 2015-12-24 | 2015-12-24 | Battery management system's power protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521107667.8U CN205283192U (en) | 2015-12-24 | 2015-12-24 | Battery management system's power protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205283192U true CN205283192U (en) | 2016-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521107667.8U Active CN205283192U (en) | 2015-12-24 | 2015-12-24 | Battery management system's power protection circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN205283192U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356914A (en) * | 2016-08-30 | 2017-01-25 | 杭州铁城信息科技有限公司 | Vehicle-mounted battery charger provided with output protection circuit |
| CN107042804A (en) * | 2017-05-04 | 2017-08-15 | 山东省科学院自动化研究所 | A kind of throw load pulse protector |
-
2015
- 2015-12-24 CN CN201521107667.8U patent/CN205283192U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356914A (en) * | 2016-08-30 | 2017-01-25 | 杭州铁城信息科技有限公司 | Vehicle-mounted battery charger provided with output protection circuit |
| CN107042804A (en) * | 2017-05-04 | 2017-08-15 | 山东省科学院自动化研究所 | A kind of throw load pulse protector |
| CN107042804B (en) * | 2017-05-04 | 2023-05-26 | 山东省科学院自动化研究所 | Load throwing pulse protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |