CN209402152U - A kind of high-power lithium battery group output short circuit protection circuit - Google Patents
A kind of high-power lithium battery group output short circuit protection circuit Download PDFInfo
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- CN209402152U CN209402152U CN201920024555.8U CN201920024555U CN209402152U CN 209402152 U CN209402152 U CN 209402152U CN 201920024555 U CN201920024555 U CN 201920024555U CN 209402152 U CN209402152 U CN 209402152U
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Abstract
The utility model provides a kind of high-power lithium battery group output short circuit protection circuit, including battery pack B1, controllable switch SW1, inductance L1, capacitor C1, sampling resistor R1 and controller；Wherein, the inductance L1 and capacitor C1 forms lc circuit, 1 foot of the battery pack B1 connects 1 foot of the controllable switch SW1,2 foot of battery pack B1 is grounded and connects 1 foot of the sampling resistor R1,2 feet of the controllable switch SW1 connect 2 feet of the inductance L1,1 foot of the inductance L1 connects 1 foot of the capacitor C1,1 foot of the inductance L1 is as the main positive interface P+ of output, 2 feet of the capacitor C1 connect 2 feet of the sampling resistor, and 2 feet of the capacitor C1 are as the main negative interface P- of output.The beneficial effects of the utility model are: being exactly when output short-circuit occurs for battery pack B1, will not generate very big short circuit current can disconnect output.
Description
Technical field
The utility model relates to short-circuit protection circuit more particularly to a kind of high-power lithium battery group output short circuit protection electricity
Road.
Background technique
High-power lithium battery group is widely used in family's energy-storage system, base station backup power supply, ups power, substitution plumbic acid electricity
Pond.Since lithium battery internal resistance is small, electric current rises fast characteristic, when battery short circuit, can generate great short circuit current, so output
Multiple short-circuit protection circuit is generally used, but function and effect are not in large-current electric cell system for general short circuit protection measures
It is good；Since short circuit current is bigger, needs fuse using big breaking current, it is big to occupy volume, if short with common metal-oxide-semiconductor
Road cut-off protection circuit then needs many metal-oxide-semiconductors in parallel, and since the maximum current of metal-oxide-semiconductor limits, maximum cutting electric current
No more than 1KA, it is easy to burn out metal-oxide-semiconductor in metal-oxide-semiconductor cutting-off process.
Summary of the invention
In order to solve the problems in the prior art, the utility model provides a kind of high-power lithium battery group output short-circuit guarantor
Protection circuit.
The utility model provides a kind of high-power lithium battery group output short circuit protection circuit, including battery pack B1, controllable
Switch SW1, inductance L1, capacitor C1, sampling resistor R1 and controller；Wherein, the inductance L1 and capacitor C1 composition LC electricity
Road, 1 foot of the battery pack B1 connect 1 foot of the controllable switch SW1, and 2 foot of battery pack B1 is grounded and connects described adopt
1 foot of sample resistance R1,2 feet of the controllable switch SW1 connect 2 feet of the inductance L1, described in the 1 foot connection of the inductance L1
1 foot of capacitor C1, for 1 foot of the inductance L1 as the main positive interface P+ of output, 2 feet of the capacitor C1 connect the sampling resistor
2 feet, 2 feet of the capacitor C1 connect as the main negative interface P- of output, the collection terminal of the controller and the sampling resistor R1
It connects, the control terminal of the controller is connect with the controllable switch SW1, and the controller is used to control the disconnected of controllable switch SW1
It opens and is closed.
The beneficial effects of the utility model are: through the above scheme, lc circuit is added, using lc circuit to electric current phase shift function
Can, slow down the rise time of short circuit current, has disconnected and time enough is provided to controller acquisition, control controllable switch SW1, this
The advantages of circuit is exactly when output short-circuit occurs for battery pack B1, and will not generate very big short circuit current can disconnect output.
Detailed description of the invention
Fig. 1 is a kind of circuit diagram of high-power lithium battery group output short circuit protection circuit of the utility model.
Specific embodiment
The utility model is described in further detail for explanation and specific embodiment with reference to the accompanying drawing.
As shown in Figure 1, a kind of high-power lithium battery group output short circuit protection circuit, including battery pack B1, controllable switch
SW1, inductance L1, capacitor C1, sampling resistor R1 and controller 100；Wherein, the inductance L1 and capacitor C1 composition LC electricity
Road, 1 foot of the battery pack B1 connect 1 foot of the controllable switch SW1, and 2 foot of battery pack B1 is grounded and connects described adopt
1 foot of sample resistance R1,2 feet of the controllable switch SW1 connect 2 feet of the inductance L1, described in the 1 foot connection of the inductance L1
1 foot of capacitor C1, for 1 foot of the inductance L1 as the main positive interface P+ of output, 2 feet of the capacitor C1 connect the sampling resistor
2 feet, 2 feet of the capacitor C1 are as the main negative interface P- of output, the collection terminal of the controller 100 and the sampling resistor R1
Connection, the control terminal of the controller 100 are connect with the controllable switch SW1, and the controller 100 is for controlling controllable switch
The disconnection and closure of SW1.
A kind of high-power lithium battery group output short circuit protection circuit provided by the utility model can work and close shape
State, normal output state, short-circuit condition, the course of work are as follows:
1, closed state: user does not use battery pack B1, then controller 100 disconnects controllable switch SW1, and battery pack B1 is not
Work.
2, normal output state: when user needs using battery B1, controllable switch SW1 is closed by controller 100, battery
To normal output to load supplying, capacitor C1 cooperates in normal power supply with inductance L1 group B1, compensates due to caused by inductance L1
Dynamic current variation, the effect stabilized the output voltage.
3, short-circuit condition: in use, when short circuit occurs for battery pack B1 output end, due to connecting on output loop
Inductance L1, output electric current slowly rise, and give controller 100 enough current acquisition time；It is set when electric current reaches controller 100
When the overcurrent point set, in a very short period of time, control issues the movement of shutdown controllable switch SW1 to controller 100, short-circuit at this time
Electric current does not reach maximum short circuit current also, and controllable switch SW1 has been switched off；Have the function that short-circuit protection.
A kind of high-power lithium battery group output short circuit protection circuit provided by the utility model, joined lc circuit, utilize
Lc circuit has slowed down the rise time of short circuit current to electric current phase shift function, to the acquisition of controller 100, control controllable switch SW1
It disconnects and time enough is provided, be exactly that will not be generated very big short when output short-circuit occurs for battery pack B1 the advantages of this circuit
Road electric current can disconnect output, therefore can be used in large-power occasions, for example be applied to 500A or more output electric current
System, and increases the reliability of system, safety and reusable.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard
To belong to the protection scope of the utility model.
Claims (1)
1. a kind of high-power lithium battery group output short circuit protection circuit, it is characterised in that: including battery pack B1, controllable switch SW1,
Inductance L1, capacitor C1, sampling resistor R1 and controller；Wherein, the inductance L1 and capacitor C1 forms lc circuit, the electricity
1 foot of pond group B1 connects 1 foot of the controllable switch SW1, and 2 foot of battery pack B1 is grounded and connects the sampling resistor R1
1 foot, 2 feet of the controllable switch SW1 connect 2 feet of the inductance L1, and 1 foot of the inductance L1 connects the capacitor C1's
1 foot, for 1 foot of the inductance L1 as the main positive interface P+ of output, 2 feet of the capacitor C1 connect 2 feet of the sampling resistor, institute
2 feet of capacitor C1 are stated as the main negative interface P- of output, the collection terminal of the controller is connect with the sampling resistor R1, the control
The control terminal of device processed is connect with the controllable switch SW1, and the controller is used to control the disconnection and closure of controllable switch SW1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920024555.8U CN209402152U (en) | 2019-01-04 | 2019-01-04 | A kind of high-power lithium battery group output short circuit protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920024555.8U CN209402152U (en) | 2019-01-04 | 2019-01-04 | A kind of high-power lithium battery group output short circuit protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209402152U true CN209402152U (en) | 2019-09-17 |
Family
ID=67897966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920024555.8U Active CN209402152U (en) | 2019-01-04 | 2019-01-04 | A kind of high-power lithium battery group output short circuit protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209402152U (en) |
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2019
- 2019-01-04 CN CN201920024555.8U patent/CN209402152U/en active Active
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