CN210041361U - Charging and discharging switching module of parallel battery pack - Google Patents
Charging and discharging switching module of parallel battery pack Download PDFInfo
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- CN210041361U CN210041361U CN201920464551.1U CN201920464551U CN210041361U CN 210041361 U CN210041361 U CN 210041361U CN 201920464551 U CN201920464551 U CN 201920464551U CN 210041361 U CN210041361 U CN 210041361U
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Abstract
The utility model provides a charge-discharge switching module of parallelly connected group battery for solve the problem that current parallelly connected group battery consumed extra power and can't come back to fill on line, it includes: a plurality of battery packs; the power supply switching circuits are provided with a current limiting switch, a high-power switch connected with the current limiting switch in parallel and a current limiting element connected with the current limiting switch in series; and each charging switching loop is provided with an external charging switch and an internal balancing switch, the external charging switch and the internal balancing switch are electrically connected with an active balancing module, the other end of the external charging switch and the other end of the internal balancing switch are respectively and electrically connected with two ends of the power supply switching loop, and each battery pack is electrically connected with the active balancing module, the power supply switching loop and the charging switching loop.
Description
Technical Field
The utility model relates to a circuit module for electric power storage and power supply, especially one kind can reduce power consumption to realize the on-line electricity of mending the charge-discharge switching module of parallelly connected group battery.
Background
A plurality of batteries are connected in series and then connected in parallel to form a parallel battery pack, which has the characteristics of high output voltage and long discharge time, can be repeatedly charged and discharged, and is widely applied to various power devices. When the parallel battery pack is applied, the electric states of potential difference, electric quantity, impedance and the like of each battery pack need to be managed, so that the situation that current reversely flows into a low-voltage battery pack from a high-voltage battery pack to cause insufficient electricity consumption of actual output, even cause element damage and shorten the service life can be avoided.
The existing parallel battery pack can be connected with diodes in series in the forward direction of each battery pack, the limited current can only be output but cannot be reversely recharged, however, the forward bias characteristic of the diodes causes extra power consumption in the output process, and in addition, the limited current can only be output in a single direction, so that the parallel battery pack cannot be applied to technologies such as brake recharging, battery active balancing and the like; in addition, the existing parallel battery pack can also switch and use the battery pack with high electric quantity by arranging a switch loop in each battery pack, and cut off the battery pack with exhausted or low electric quantity, so that the current impact can be avoided and the single battery can be switched to charge, but the electric power can be interrupted in the switching process, and the working efficiency of the electric device is reduced, and the use safety is influenced.
In view of the above, there is a need for improved switching management of parallel battery packs.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, an object of the present invention is to provide a charging and discharging switching module for a parallel battery pack, which can be switched fast without power interruption, thereby avoiding power interruption.
An object of the utility model is to provide a charge-discharge switching module of parallelly connected group battery can fill on line back, avoids extra power consumption.
An object of the utility model is to provide a charge-discharge switching module of parallelly connected group battery can switch high power output after the authentication authority.
An object of the utility model is to provide a charge-discharge switching module of parallelly connected group battery can steady voltage and extension power supply time.
The utility model discloses a charge-discharge switching module of parallelly connected group battery, include: the battery pack comprises a plurality of battery packs, wherein the head end and the tail end of each battery pack are respectively provided with a first electrode and a second electrode; the power supply switching circuits are electrically connected with the battery packs one by one, each power supply switching circuit is provided with a current limiting switch, a high-power switch connected with the current limiting switch in parallel and a current limiting element connected with the current limiting switch in series, one end of the high-power switch is electrically connected with the second electrode, the other end of the high-power switch is an electric connection end, the first electrode is the other electric connection end, and each battery pack is connected with other battery packs in parallel through the two electric connection ends; and a plurality of charging switching loops, one to these a plurality of group batteries of an electric connection, each charging switching loop has an outside charge switch and an inside balance switch, one end of this outside charge switch and one end electric connection of this inside balance switch are an initiative balancing module, the other end electric connection of this outside charge switch is located the end of connecting electricity of this power supply switching loop side, this the other end electric connection of inside balance switch is this the second electrode of this group battery, and this first electrode electric connection of this group battery is this initiative balancing module, this initiative balancing module is each battery of electric connection in this group battery respectively.
Therefore, the utility model discloses a charge-discharge switching module of parallelly connected group battery through making this power supply switching circuit and this switching circuit that charges, can not cut off the power supply of switching single group battery in turn, or a plurality of group batteries supply power simultaneously, can also switch outside charging or internal voltage balance during the power supply, reaches and avoids current interruption, recharges on line, increase of service life and reduces effects such as power consumption.
Wherein, each battery pack is connected with a load and a charging device in parallel through the two electric connecting ends. Therefore, each battery pack can drive the load and balance the voltage at the same time, and the effects of stabilizing the voltage and prolonging the power supply time are achieved.
Wherein the load comprises an authentication protection system. Therefore, the authority of high-power supply can be confirmed by carrying out handshake authentication, and the effect of improving the use safety is achieved.
The charging and discharging switching module of the parallel battery pack further comprises a plurality of monitoring units, one monitoring unit is located at each of the plurality of battery packs, and each monitoring unit is respectively coupled with two ends of each battery in the battery pack. Therefore, all batteries can be monitored, and the effect of searching the abnormal condition of the power supply module is achieved.
Each monitoring unit comprises a plurality of voltmeters and a plurality of ammeters, and each voltmeter is respectively coupled with each battery in the battery pack. Therefore, the method can measure the electrical parameters such as charging current, power supply voltage and the like, and has the effect of monitoring the charging and discharging states of the battery pack in real time.
The charging and discharging switching module of the parallel battery pack further comprises a plurality of control units, one control unit is located in the plurality of battery packs, and each control unit is in coupling connection with the monitoring unit, the active balancing module, the power supply switching loop and the charging switching loop. Therefore, the appropriate charging and discharging mode can be switched according to the monitoring result, and the effect of automatically and immediately adjusting the working state is achieved.
Wherein, each control unit has a pulse width modulation controller, and the pulse width modulation controller is electrically connected with the current-limiting switch, the high-power switch, the external charging switch and the internal balance switch. Therefore, the switch can be switched on or off by outputting the modulation signal, and the effect of fast and correct multiple switching is achieved.
The charging and discharging switching module of the parallel battery pack further comprises a processing unit which is respectively coupled with the plurality of control units, the load and the charging device. Therefore, the power supply state and the charge balance requirement of each battery pack can be integrated, and the effects of improving the charge-discharge efficiency and stabilizing the supply and the demand are achieved.
Drawings
Fig. 1 is a block diagram of a preferred embodiment of the present invention.
Fig. 2 is a partial circuit diagram of a preferred embodiment of the present invention.
Fig. 3 a-f are diagrams illustrating the power supply switching status according to the preferred embodiment of the present invention.
Fig. 4 a-b are diagrams illustrating the charging switching situation according to the preferred embodiment of the present invention.
Description of the reference numerals
1, 1' power supply switching loop
11, 11' current limiting switch
12, 12' high power switch
13, 13' current-limiting element
1a first end
1b second end
2 charging switching loop
21 external charging switch
22 internal balance switch
3 monitoring unit
4 control unit
5 processing Unit
P, P' battery pack
P1 first electrode
P2 second electrode
Active balancing module A
T connects electric end
L load
And C, a charging device.
Detailed Description
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail as follows:
the elements and components described throughout the present invention are referred to by the term "a" only for convenience and to provide a general meaning of the scope of the present invention; in the present invention, it is to be understood that one or at least one is included, and a single concept also includes a plurality unless it is obvious that other meanings are included.
Referring to fig. 1, a preferred embodiment of a charging/discharging switching module of a parallel battery pack of the present invention includes a plurality of battery packs P, a plurality of power supply switching circuits 1, a plurality of charging switching circuits 2, a plurality of monitoring units 3, a plurality of control units 4, and a processing unit 5, the power supply switching loop 1 is electrically connected with the battery pack P, the charging switching loop 2 is electrically connected with the power supply switching loop 1 and an active balancing module A, the monitoring unit 3 is coupled to the battery pack P, the control unit 4 is coupled to the power switching circuit 1, the charging switching circuit 2, the monitoring unit 3 and the active balancing module a, the processing unit 5 is coupled to the control units 4, and the battery pack P is electrically connected to the active balancing module a, and the battery packs P are connected in parallel to form a parallel battery pack.
Referring to fig. 2, the power switching circuit 1 is formed by connecting a current-limiting switch 11 and a high-power switch 12 in parallel, the current-limiting switch 11 is connected in series with a current-limiting element 13, the current-limiting switch 11 and the high-power switch 12 can be mosfets for turning on or off the current passing through the current-limiting switch 11 and the high-power switch 12, and the current-limiting element 13 can be a resistor for reducing the current passing through the current-limiting switch 11 and the current-limiting element 13.
Referring to fig. 1 and 2, the battery pack P may be formed by a plurality of batteries connected in series, the head and the tail of the battery pack P are respectively a first electrode P1 and a second electrode P2, the first electrode P1 is an electric connection terminal T, the second electrode P2 is electrically connected to a first terminal 1a of the power supply switching circuit 1, a second terminal 1b of the power supply switching circuit 1 is another electric connection terminal T, and the two electric connection terminals T are used for connecting other battery packs P in parallel and electrically connecting a load L or a charging device C. In the present embodiment, the first electrode P1 is a positive electrode, and the second electrode P2 is a negative electrode, but the present invention is not limited thereto.
The charging switch circuit 2 is electrically connected to the active balancing module a by one end of an external charging switch 21 and one end of an internal balancing switch 22, the other end of the external charging switch 21 is electrically connected to the second end 1b of the power supply switch circuit 1, the other end of the internal balancing switch 22 is electrically connected to the first end 1a of the power supply switch circuit 1, the first electrode P1 of the battery P is electrically connected to the active balancing module a, and the external charging switch 21 and the internal balancing switch 22 can be mosfets for turning on or off the current passing through the external charging switch 21 and the internal balancing switch 22. When the external charging switch 21 is turned on, the charging device C or other battery pack P applies a voltage to the active balancing module a, which can charge each battery in the battery pack P; when the internal balancing switch 22 is turned on, the battery pack P provides a superimposed voltage to the active balancing module a, and the active balancing module a can balance the voltages of the cells in the battery pack P, thereby reducing the power consumption of the battery pack P and prolonging the service life of the cells. An embodiment of the active balancing module a is disclosed in taiwan patent application No. I581543 of "active balancing module of series battery and control method thereof".
Referring to fig. 1, the monitoring unit 3 may include a plurality of voltmeters and a plurality of ammeters for respectively measuring electrical parameters such as voltage of each battery in the battery pack P, charging current of each battery by the active balancing module a, and total voltage of the battery pack P, so as to monitor the charging and discharging states of the battery pack P in real time.
The control unit 4 adjusts the charge balancing mode of the active balancing module a according to each parameter measured by the monitoring unit 3, the control unit 4 preferably has a pulse width modulation controller, the control unit 4 can switch the on or off states of the power supply switching loop 1 and the charge switching loop 2 by outputting a plurality of pulse width modulation signals to the current limiting switch 11, the high power switch 12, the external charge switch 21 and the internal balancing switch 22, respectively, and the control unit 4 has an effect of changing the charge and discharge state of the battery pack P.
The processing unit 5 can be coupled to the load L and the charging device C, respectively, and sends instructions to the plurality of control units 4 according to the use conditions of the load L and the charging device C, the processing unit 5 can switch the power supply and charging behaviors of the corresponding battery packs P through the control units 4, and the processing unit 5 can manage the plurality of battery packs P simultaneously, so that the whole parallel battery packs can stably output for a long time.
Referring to fig. 3a to 3f, with the above structure, the charging and discharging switching module of the parallel battery pack of the present invention can perform the authentication start and the uninterrupted switching, as shown in fig. 3a, when the parallel battery pack starts to supply power, the current limiting switch 11 of the power supply switching loop 1 is turned on first, and the high power switch 12 maintains the off state, so that the battery pack P can only provide a limited small current to the load L, and the load L can further include an authentication protection system, which performs handshake authentication by using a limited current to confirm that the load L has the permission to accept the high power current; as shown in fig. 3b, after the authentication is passed, the high power switch 12 can be switched to be on under the condition that the current limit switch 11 is kept on, so that power is continuously supplied in the process of converting the battery pack P into high power output, and the load L can obtain electric power required by operation; as shown in fig. 3c, after the output of the battery pack P is stabilized, the current limiting switch 11 can be turned off to avoid additional power consumption caused by the current limiting element 13. In addition, after the authentication passes, other a plurality of group battery P 'can also be parallelly connected with this group battery P through switching on each high power switch 12' with the power supply simultaneously, can prolong power consumption time and stabilizing voltage, the utility model discloses do not use embodiment and attached drawing as the limit.
When the electric quantity of the battery pack P is to be exhausted, the charge-discharge switching module of the parallel battery pack of the present invention can be powered by another battery pack P ', as shown in fig. 3d, under the condition that the high power switch 12 is kept on, the current limiting switch 11 ' of the replaced battery pack P ' is switched on; as shown in fig. 3e, switching the high power switch 12 off and switching the high power switch 12 ' of the replaced battery pack P ' on can prevent a large amount of current from reversely flowing into the battery pack P from the replaced battery pack P '; as shown in fig. 3f, after the battery pack P ' is stably output through the high power switch 12 ', the current limiting switch 11 ' may be turned off.
Referring to fig. 4 a-4 b, with the above structure, the charging/discharging switching module of the parallel battery pack of the present invention can charge each battery pack P, P ' each other, or charge each battery cell in each battery pack P, P ' to a balanced state, as shown in fig. 4a, when the external charging switch 21 of the charging switching circuit 2 is turned on, the charging device C or other battery packs P ' can charge the battery in the battery pack P individually through the active balancing module a; as shown in fig. 4b, when the internal balance switch 22 of the charge switching circuit 2 is turned on, the battery with lower voltage in the battery pack P is charged by the total voltage of the battery pack P, so that the voltages of the individual batteries are consistent, thereby prolonging the service life of the battery pack P.
To sum up, the utility model discloses a charge-discharge switching module of parallelly connected group battery through controlling this power supply switching circuit and this switching circuit that charges, can not cut off the power supply of switching single group battery in turn, or a plurality of group batteries supply power simultaneously, can also switch outside during the power supply and charge or internal voltage is balanced, reaches and avoids current interruption, recharges on line, increase of service life and reduces effects such as power consumption.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention.
Claims (8)
1. A charge-discharge switching module of a parallel battery pack, comprising:
the battery pack comprises a plurality of battery packs, wherein the head end and the tail end of each battery pack are respectively provided with a first electrode and a second electrode;
the power supply switching circuits are electrically connected with the battery packs one by one, each power supply switching circuit is provided with a current limiting switch, a high-power switch connected with the current limiting switch in parallel and a current limiting element connected with the current limiting switch in series, one end of the high-power switch is electrically connected with the second electrode, the other end of the high-power switch is an electric connection end, the first electrode is the other electric connection end, and each battery pack is connected with other battery packs in parallel through the two electric connection ends; and
the battery pack comprises a plurality of battery packs, a plurality of charging switching loops and a plurality of active balancing modules, wherein one battery pack is electrically connected with the plurality of battery packs, each charging switching loop is provided with an external charging switch and an internal balancing switch, one end of the external charging switch and one end of the internal balancing switch are electrically connected with one active balancing module, the other end of the external charging switch is electrically connected with a power connection end on the side of the power supply switching loop, the other end of the internal balancing switch is electrically connected with the second electrode of the battery pack, the first electrode of the battery pack is electrically connected with the active balancing modules, and the active balancing modules are respectively electrically connected with each battery in the battery pack.
2. The charge-discharge switching module for parallel battery packs according to claim 1, wherein each battery pack is connected in parallel with a load and a charging device through the two connecting terminals.
3. The parallel battery pack charge-discharge switching module according to claim 2, wherein the load comprises an authentication protection system.
4. The charging/discharging switching module of parallel battery set according to claim 2, further comprising a plurality of monitoring units, one for one, located in the plurality of battery sets, each monitoring unit being coupled to two ends of each battery in the battery set.
5. The charging/discharging switching module of parallel battery pack according to claim 4, wherein each monitoring unit comprises a plurality of voltmeter and a plurality of ampere meters, respectively coupled to each battery in the battery pack.
6. The charging/discharging switching module of claim 4, wherein the charging/discharging switching module further comprises a plurality of control units, one for each of the plurality of battery packs, each control unit being coupled to the monitoring unit, the active balancing module, the power supply switching circuit and the charging switching circuit.
7. The charging/discharging switching module of claim 6, wherein each control unit has a PWM controller electrically connected to the current limit switch, the high power switch, the external charging switch and the internal balance switch.
8. The charging/discharging switching module of claim 6, further comprising a processing unit coupled to the plurality of control units, the load and the charging device respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920464551.1U CN210041361U (en) | 2019-04-08 | 2019-04-08 | Charging and discharging switching module of parallel battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920464551.1U CN210041361U (en) | 2019-04-08 | 2019-04-08 | Charging and discharging switching module of parallel battery pack |
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| Publication Number | Publication Date |
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| CN210041361U true CN210041361U (en) | 2020-02-07 |
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| CN201920464551.1U Expired - Fee Related CN210041361U (en) | 2019-04-08 | 2019-04-08 | Charging and discharging switching module of parallel battery pack |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111293754A (en) * | 2020-03-20 | 2020-06-16 | Oppo广东移动通信有限公司 | Charging system, method, electronic device, and computer-readable storage medium |
| CN111555386A (en) * | 2020-04-30 | 2020-08-18 | 科华恒盛股份有限公司 | Power supply product and power supply's battery charging protection circuit |
| CN112994205A (en) * | 2021-03-29 | 2021-06-18 | 东莞新能德科技有限公司 | Device using battery pack |
-
2019
- 2019-04-08 CN CN201920464551.1U patent/CN210041361U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111293754A (en) * | 2020-03-20 | 2020-06-16 | Oppo广东移动通信有限公司 | Charging system, method, electronic device, and computer-readable storage medium |
| CN111293754B (en) * | 2020-03-20 | 2021-11-09 | Oppo广东移动通信有限公司 | Charging system, method, electronic device, and computer-readable storage medium |
| CN111555386A (en) * | 2020-04-30 | 2020-08-18 | 科华恒盛股份有限公司 | Power supply product and power supply's battery charging protection circuit |
| CN112994205A (en) * | 2021-03-29 | 2021-06-18 | 东莞新能德科技有限公司 | Device using battery pack |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200207 Termination date: 20210408 |
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| CF01 | Termination of patent right due to non-payment of annual fee |