CN205283194U - Battery management system's linear power supply - Google Patents
Battery management system's linear power supply Download PDFInfo
- Publication number
- CN205283194U CN205283194U CN201521108276.8U CN201521108276U CN205283194U CN 205283194 U CN205283194 U CN 205283194U CN 201521108276 U CN201521108276 U CN 201521108276U CN 205283194 U CN205283194 U CN 205283194U
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- effect transistor
- field effect
- power supply
- management system
- battery management
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Abstract
The utility model relates to a battery management system's linear power supply, including field effect transistor Q1 and linear voltage regulator LDO, field effect transistor Q1's grid connects holds N festival battery cell's positive pole, drain electrode to connect the total anode of group battery, source electrode to connect linear voltage regulator LDO's input in the group battery from ground, linear voltage regulator LDO's output termination load, wherein N> 1. The utility model discloses a linear power supply steps down to the voltage of gaining from the group battery through field effect transistor Q1 and steps down once more and the steady voltage through linear voltage regulator LDO, makes the power firm output of output, field effect transistor Q1 does not consume the stand -by time of electric current extension group battery when not taking the load, adopt field effect transistor Q1's low cost.
Description
Technical field
This utility model relates to battery management system technical field, is specifically related to the linear power supply of a kind of battery management system.
Background technology
At present, secondary cell is widely applied as emerging clean energy resource, as in field of power tools, electric automobile field etc. But secondary cell there is also following shortcomings, as short in storage little energy, the life-span, connection in series-parallel uses problem, safety in utilization, battery electric quantity estimation difficulty etc. The performance of battery is extremely complex, and different types of battery behavior also differs greatly. Battery management system (BMS) mainly aims at the utilization rate that can improve battery, it is prevented that overcharge and overdischarge occurs in battery, extends the service life of battery, the state of monitoring battery.
The power supply of existing battery management system mainly has two ways. The first is Switching Power Supply mode: supplied by DC-DC blood pressure lowering, but which is relatively costly, and the interference introduced is relatively big, causes power supply unstable. The second is linear power supply mode: using stabilivolt or other voltage-stabilizing device blood pressure lowerings, and stabilivolt or other voltage-stabilizing device steady operations need to consume certain electric current, this electric current yet suffers from when non-loaded, causes stand-by power consumption higher, and stand-by time is short.
Utility model content
The purpose of this utility model is to overcome shortcomings and deficiencies of the prior art, it is provided that a kind of low cost, low-power consumption the linear power supply of battery management system.
The purpose of this utility model is achieved through the following technical solutions:
A kind of linear power supply of battery management system, including field effect transistor Q1 and linear voltage regulator LDO, the grid of described field effect transistor Q1 is connected in set of cells from ground end, and N saves the positive pole of cell, draining connects the input of the total anode of set of cells, source connection manostat LDO, the output terminating load of described linear voltage regulator LDO, wherein N > 1.
As preferably, the grid of described field effect transistor Q1 is connected in set of cells from ground end the positive pole of Section 4 cell.
As preferably, the grid of described field effect transistor Q1 is connected in set of cells from ground end the positive pole of Section 5 cell.
As preferably, the linear power supply of described battery management system also includes the drain electrode series resistor R1 of resistance R1, described field effect transistor Q1 and is followed by the total anode to set of cells.
As preferably, the linear power supply of described battery management system also includes the grid series resistor R2 of resistance R2, described field effect transistor Q1 and is followed by set of cells N from ground end saving the positive pole of cell, wherein N > 1.
As preferably, the linear power supply of described battery management system also includes Zener diode Z1, and the negative pole of described Zener diode connects the grid of field effect transistor Q1, the input of positive terminal manostat LDO.
As preferably, the linear power supply of battery management system also includes the grid of a termination field effect transistor Q1 of electric capacity C3, described electric capacity C3, and the other end connects the input of linear voltage regulator LDO.
As preferably, described in meet flying capcitor C1 between the input of linear voltage regulator LDO and ground end, flying capcitor C2 between outfan and ground end.
This utility model includes advantages below and beneficial effect compared to existing technology:
(1) linear power supply of the present utility model carries out blood pressure lowering by the field effect transistor Q1 voltage to obtaining from set of cells and again carries out blood pressure lowering voltage stabilizing by linear voltage regulator LDO, makes the power good of output export; During bringing onto load, field effect transistor Q1 does not consume the stand-by time of electric current prolongation set of cells; Employing field effect transistor Q1's is with low cost.
(2) linear power supply of the present utility model is that battery management system is powered from set of cells power taking, eliminates external power supply, saves cost.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the linear power supply of 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 linear power supply of a kind of battery management system, including field effect transistor Q1, linear voltage regulator LDO, resistance R1, resistance R2, electric capacity C1, electric capacity C2, electric capacity C3 and Zener diode Z1. One end of described resistance R2 is connected in set of cells from ground end N (N > 1) and saves the positive pole of cell, the grid of another termination field effect transistor Q1; Described Zener diode Z1 and electric capacity C3 is connected in parallel, the grid of a termination field effect transistor Q1 of this parallel branch, the source electrode of another termination field effect transistor Q1; The drain series resistance R1 of field effect transistor Q1 is followed by the total anode to set of cells, the input of source connection manostat LDO; Flying capcitor C1, flying capcitor C2 between outfan and ground end between input and the ground end of described linear voltage regulator LDO.
Having n batteries for set of cells, an end of described resistance R2 is connected in set of cells from ground end N and saves the positive pole of cell, described N can be 2,3,4,5,6 ..., n. As preferably, one end of described resistance R2 can be connected in set of cells from ground end the positive pole of Section 4 or Section 5 cell.
Described resistance R2 is serially connected between positive pole and the grid of field effect transistor Q1 of the monomer voltage of set of cells, is current-limiting protection Z1 when Z1 works and is not burnt out by big electric current; Do the driving current limliting of Q1 simultaneously, adjust the turn-on and turn-off time of Q1, ensure that Q1 grid will not because driving excessive the impacting of electric current to cause that Q1 damages.
Described resistance R1 be serially connected in the drain electrode of field effect transistor Q1 and set of cells total just between, thus reducing the power consumption of field effect transistor Q1, it is to avoid field effect transistor Q1 power consumption is excessive, generating heat excessive and burning out, improve the stability of power circuit.
Described Zener diode Z1 is connected across between the grid of field effect transistor Q1 and source electrode, the voltage introduced is carried out voltage stabilizing, it is prevented that the voltage of introducing occurs that clutter or high pressure burn out field effect transistor Q1, improves the stability of power circuit further.
Described electric capacity C3 is connected across between the grid of field effect transistor Q1 and source electrode, absorbs the surge voltage that the voltage introduced comprises, it is prevented that surge voltage burns out field effect transistor Q1, improves the stability of power circuit further.
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 (8)
1. the linear power supply of a battery management system, it is characterized in that: include field effect transistor Q1 and linear voltage regulator LDO, the grid of described field effect transistor Q1 is connected in set of cells from ground end, and N saves the positive pole of cell, draining connects the input of the total anode of set of cells, source connection manostat LDO, the output terminating load of described linear voltage regulator LDO, wherein N > 1.
2. the linear power supply of battery management system according to claim 1, it is characterised in that: the grid of described field effect transistor Q1 is connected in set of cells from ground end the positive pole of Section 4 cell.
3. the linear power supply of battery management system according to claim 1, it is characterised in that: the grid of described field effect transistor Q1 is connected in set of cells from ground end the positive pole of Section 5 cell.
4. the linear power supply of battery management system according to claim 1, it is characterised in that: the grid series resistor R2 also including resistance R2, described field effect transistor Q1 is followed by set of cells N from ground end saving the positive pole of cell, wherein N > 1.
5. the linear power supply of the battery management system according to any one of claim 1-4, it is characterised in that: the drain electrode series resistor R1 also including resistance R1, described field effect transistor Q1 is followed by the total anode to set of cells.
6. the linear power supply of the battery management system according to any one of claim 1-4, it is characterised in that: the negative pole also including Zener diode Z1, described Zener diode Z1 connects the grid of field effect transistor Q1, the input of positive terminal manostat LDO.
7. the linear power supply of the battery management system according to any one of claim 1-4, it is characterised in that: also including the grid of a termination field effect transistor Q1 of electric capacity C3, described electric capacity C3, the other end connects the input of linear voltage regulator LDO.
8. the linear power supply of the battery management system according to any one of claim 1-4, it is characterised in that: described in connect linear voltage regulator LDO input and ground end between flying capcitor C1, outfan and ground end between flying capcitor C2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521108276.8U CN205283194U (en) | 2015-12-24 | 2015-12-24 | Battery management system's linear power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521108276.8U CN205283194U (en) | 2015-12-24 | 2015-12-24 | Battery management system's linear power supply |
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| Publication Number | Publication Date |
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| CN205283194U true CN205283194U (en) | 2016-06-01 |
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| CN201521108276.8U Active CN205283194U (en) | 2015-12-24 | 2015-12-24 | Battery management system's linear power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258649A (en) * | 2021-06-17 | 2021-08-13 | 山东爱德邦智能科技有限公司 | Power battery voltage reduction circuit and power supply system |
-
2015
- 2015-12-24 CN CN201521108276.8U patent/CN205283194U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258649A (en) * | 2021-06-17 | 2021-08-13 | 山东爱德邦智能科技有限公司 | Power battery voltage reduction circuit and power supply system |
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