CN218940706U - Equalizer for secondary series battery balance, power supply device and power supply equipment - Google Patents
Equalizer for secondary series battery balance, power supply device and power supply equipment Download PDFInfo
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- CN218940706U CN218940706U CN202222142606.1U CN202222142606U CN218940706U CN 218940706 U CN218940706 U CN 218940706U CN 202222142606 U CN202222142606 U CN 202222142606U CN 218940706 U CN218940706 U CN 218940706U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses an equalizer for secondary serial battery balance, a power supply device and power supply equipment, wherein the equalizer for secondary serial battery balance comprises: a plurality of charge equalization circuits, each charge equalization circuit being for connection in parallel with one of the battery packs; the main control chip is electrically connected with the plurality of battery packs in a one-to-one correspondence manner, and the plurality of output ends of the main control chip are connected with the controlled ends of the plurality of charge equalization circuits in a one-to-one correspondence manner; the main control chip is used for detecting the voltage at two ends of each battery pack, and controlling the corresponding charge equalization circuit to bypass the over-voltage battery pack when any one battery pack is detected to be over-voltage in the charging process of the power supply device so as to stop charging the battery pack; the technical scheme of the utility model aims to improve the consistency of the battery packs when a plurality of battery packs are used in series, and avoid influencing the performance and the service life of the battery packs due to poor consistency of the battery packs.
Description
Technical Field
The utility model relates to the technical field of battery balancing, in particular to an equalizer, a power supply device and power supply equipment for balancing secondary series batteries.
Background
In order to match the working voltage of the device, some customers may directly use several rechargeable battery packs of the same specification in series, and although battery equalization is provided between a plurality of battery cells in each battery pack, when the battery packs that should be used individually are charged in series, there is still a problem that the individual battery packs are charged in advance, so that the performance and the service life of the whole battery pack are affected.
Disclosure of Invention
The utility model aims to provide an equalizer, a power supply device and power supply equipment for balancing secondary series batteries, and aims to solve the problem that when a plurality of battery packs are charged in series, the battery packs are overcharged due to the fact that the individual battery packs are charged in advance, and therefore the performance and the service life of the battery packs are affected.
In order to achieve the above object, an equalizer for secondary serial battery balancing according to the present utility model is applied to a power supply device, the power supply device includes a plurality of battery packs connected in series in sequence, each of the battery packs includes a plurality of battery cells, and the equalizer for secondary serial battery balancing includes:
a plurality of charge equalization circuits, each of the charge equalization circuits being configured to be connected in parallel with one of the battery packs;
the voltage detection terminals of the main control chip are electrically connected with the battery packs in a one-to-one correspondence manner, and the output terminals of the main control chip are connected with the controlled terminals of the charge equalization circuits in a one-to-one correspondence manner;
the main control chip is used for detecting the voltage at two ends of each battery pack, and controlling the corresponding charge equalization circuit to bypass the over-voltage battery pack when any one of the battery packs is detected to be over-voltage in the charging process of the power supply device so as to stop charging the battery packs.
Optionally, the charge equalization circuit includes:
the first switching tube is respectively and electrically connected with the battery pack, the controlled end of the first switching tube is the controlled end of the charge equalization circuit, and the first switching tube is used for switching on/off a bypass of the battery pack under the control of the main control chip.
Optionally, the positive electrode of the battery pack is used for accessing a direct current power supply, and the equalizer for balancing the secondary series battery further comprises:
the charge equalization circuit is respectively connected with the battery pack and the charge equalization circuit in parallel, a controlled end of the charge circuit is electrically connected with the main control chip, and the charge equalization circuit is used for discharging part of electric energy of the corresponding battery pack under the control of the main control chip.
Optionally, the main control chip is further configured to control the discharge equalization circuit to stop discharging the electric energy of the battery pack when the voltage at both ends of the battery pack, where the voltage is detected to be over-voltage, falls within a normal working threshold in a discharging process of the power supply device.
Optionally, the discharge equalization circuit includes:
the discharging circuit is electrically connected with the battery pack and is used for shunting the accessed direct-current power supply so as to discharge part of electric energy of the corresponding battery pack;
the second switching tube is respectively and electrically connected with the bleeder circuit and the battery pack, the controlled end of the second switching tube is the controlled end of the discharge equalization circuit, and the second switching tube is used for switching on/off the connection between the bleeder circuit and the corresponding battery pack under the control of the main control chip.
The utility model also provides a power supply device which comprises a plurality of battery packs and the equalizer for balancing the secondary series batteries.
Optionally, the battery pack includes a plurality of battery cells and BMS module, the BMS module includes battery equalizer, the battery cell with battery equalizer electricity is connected, the battery equalizer is used for respectively to a plurality of battery cell carries out battery balance processing.
Optionally, the battery pack is any one of a lithium battery pack, a cadmium-nickel battery pack or a hydrogen-nickel battery pack.
The utility model also provides power supply equipment which comprises a plurality of battery packs and the equalizer for balancing the secondary series batteries or comprises the power supply device.
According to the technical scheme, the charging equalization circuits and the main control chip are adopted, the charging equalization circuits are connected in parallel with two ends of each battery pack in one-to-one correspondence, the main control chip is used for collecting voltages at two ends of each battery pack, and when the main control chip detects that the voltage difference of two ends of any battery pack is larger than a charging cut-off voltage value in the charging process, the charging equalization circuits are controlled to provide a bypass for the short overvoltage battery packs. Through setting up charge equalization circuit to a plurality of group batteries, make the group battery can not stop charging other group batteries because one battery is full charged when charging, avoided because other batteries are not full charged make group battery series connection subassembly charge at the continuous time of operating shorten, lead to the fact the influence to the battery performance, lead to the performance to decay too fast, and then lead to life to reduce.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an equalizer for secondary series cell balancing according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of another embodiment of an equalizer for secondary series cell balancing according to the present utility model;
FIG. 3 is a schematic diagram of an equalizer for secondary series cell balancing according to another embodiment of the present utility model;
FIG. 4 is a schematic diagram of an equalizer for secondary series cell balancing according to another embodiment of the present utility model;
fig. 5 is a schematic structural diagram of an equalizer for secondary series cell balancing according to another embodiment of the present utility model.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the |
| 10 | Charge equalization circuit | Q1 | |
| 20 | Main control chip | Q2 | |
| 30 | Discharge equalization circuit | R1 | Load resistor |
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
The utility model provides an equalizer for balancing secondary series batteries, which is applied to a power supply device.
Referring to fig. 1, in an embodiment, the power supply device includes a plurality of battery packs connected in series in sequence, each of the battery packs includes a plurality of battery cells, and the equalizer for secondary series battery balancing includes:
a plurality of charge equalization circuits 10, each of the charge equalization circuits 10 being configured to be connected in parallel with one of the battery packs;
the main control chip 20, a plurality of voltage detection ends of the main control chip 20 are electrically connected with a plurality of battery packs in a one-to-one correspondence manner, and a plurality of output ends of the main control chip 20 are connected with a plurality of controlled ends of the charge equalization circuit 10 in a one-to-one correspondence manner;
the main control chip 20 is configured to detect voltages at two ends of each of the battery packs, and control the corresponding charge equalization circuit 10 to bypass the over-voltage battery pack to stop charging the battery pack when detecting that any one of the battery packs is over-voltage during charging of the power supply device.
In this embodiment, the charge equalization circuit 10 may include at least one switch; the main control chip 20 is preset with a charging cut-off voltage value, where the charging cut-off voltage is a battery voltage when the battery pack is full of electric quantity, and the charging cut-off voltage can be set by a research and development personnel according to the rated voltage of the battery pack matched with the equalizer when the research and development personnel develop, for example, the charging cut-off voltage corresponding to the battery pack with the rated voltage of 12V is 12V.
It should be noted that, in daily life or factory work, in order to match the working voltage of the device, a customer usually connects several lead-acid batteries in series, when the customer wants to replace a lead-acid battery with a rechargeable lithium battery, a cadmium-nickel battery or a hydrogen-nickel battery, several batteries with the same specification are directly connected in series, although the battery inside each battery is balanced, the battery is charged independently in the production, and the application scenario is considered, so that the batteries which should be used independently are connected in series, and still the full battery is charged continuously because the individual battery is charged fully in advance in the charging process, so that the performance and service life of the whole battery are affected.
In order to solve the above-mentioned problem, the present embodiment adopts a plurality of charge equalization circuits 10 and a main control chip 20, the charge equalization circuits 10 are connected in parallel with two ends of each battery pack in a one-to-one correspondence manner, the main control chip 20 is configured to collect voltages at two ends of each battery pack, and when the main control chip 20 detects that the voltage at two ends of any one battery pack is greater than a charge cut-off voltage in a charging process, the charge equalization circuits 10 are controlled to provide a bypass for the over-voltage battery pack, so that when an accessed charging power supply charges a plurality of battery packs in a power supply device, the over-voltage battery pack flows to the next battery pack with charging through the bypass of the over-voltage battery pack. By providing the charge equalization circuit 10 for the plurality of battery packs, the plurality of battery packs can not be charged continuously due to full charge of the individual batteries or can be overcharged due to continuous charge of the individual batteries, and the influence on the performance and the service life of the battery packs due to poor consistency of the battery packs is avoided.
Specifically, when the equalizer for balancing secondary serial batteries works, the main control chip 20 collects voltages at two ends of each battery pack, performs difference processing on values at two ends of the collected battery packs to obtain battery voltages corresponding to the battery packs, when the battery pack serial components are charged, if the main control chip 20 detects that the battery voltage of any battery pack is greater than a charging cut-off voltage, it is indicated that the battery pack is over-pressurized during charging, the main control chip 20 outputs a bypass control signal, the charge equalization circuit 10 provides a bypass for the over-pressurized battery pack after receiving the bypass control signal, so that when an accessed charging power supply charges a power supply device, the next battery pack is charged through the bypass corresponding to the full battery pack, and the full battery pack is not charged any more.
For example, when the main control chip 20 detects that the voltage at two ends of the battery B1 is greater than 12V during charging by the power supply device, the main control chip 20 outputs a B1 bypass control signal to the charge equalization circuit 10 corresponding to the battery B1, so that the charge equalization circuit 10 provides a bypass for the battery B1, and the connected charging power supply does not charge the battery B1 when charging the whole battery, and directly charges the battery B2 to Bn through the bypass of the battery B1.
In practical application, when the user faces the equipment requiring 36V power supply, 3 12V battery packs are respectively connected with the lead wires for the equalizer, and the equalizer is used for carrying out equalizing setting on the 3 battery packs, so that the 3 12V battery packs automatically provide a bypass for the fully charged battery packs during charging, and the other 2 battery packs are prevented from being fully charged.
According to the technical scheme, the charging equalization circuits 10 and the main control chip 20 are adopted, the charging equalization circuits 10 are connected in parallel with the two ends of each battery pack in a one-to-one correspondence mode, the main control chip 20 is used for collecting the voltage of the two ends of each battery pack, and when the main control chip 20 detects that the voltage difference of the two ends of any battery pack is larger than a charging cut-off voltage value in the charging process, the charging equalization circuits 10 are controlled to provide a bypass for the short overvoltage battery packs. By arranging the charge equalization circuit 10 on a plurality of battery packs, the battery packs can not be charged by one battery fully, so that the charging of other battery packs is stopped, the continuous time of the charging of the battery pack serial components is shortened when the battery packs are operated due to the fact that the other battery packs are not fully charged, the performance of the battery packs is influenced, the performance is attenuated too fast, and the service life is further reduced.
Referring to fig. 2, in an embodiment, the number of the main control chip 20 may be plural, two voltage detection terminals of each main control chip 20 are connected to two ends of one battery pack in parallel, and an output terminal of the main control chip 20 is connected to a controlled terminal of the charge equalization circuit 10 corresponding to the battery pack;
each of the main control chips 20 is configured to detect voltages at two ends of one of the battery packs, and control the corresponding charge equalization circuit 10 to bypass the over-voltage battery pack to stop charging the battery pack when detecting the over-voltage of the battery pack during the charging process of the power supply device.
In this embodiment, the number of the main control chips 20 is determined by the total number of the battery packs expected to be accessed by the developer during design, for example, when the user faces the equipment requiring 36V power supply, 3 12V battery packs are required, and the number of the corresponding main control chips 20 is 3. Thus, when the equalizer is used by a user, 3 12V battery packs are respectively connected with 3 main control chips 20 through wires, so that each main control chip 20 collects voltages at two ends of one battery pack, difference processing is carried out on values at two ends of the collected battery packs to obtain battery voltages corresponding to the battery packs, when the battery pack serial components are charged, if the main control chip 20 detects that the battery voltages of the battery packs are larger than the charging cut-off voltage, the battery packs are over-voltage during charging at the moment, and the charging equalization circuit 10 automatically provides a bypass for the fully charged battery packs to prevent the other 2 battery packs from being unable to be fully charged.
Referring to fig. 1 and 4, in an embodiment, the charge equalization circuit 10 includes:
the first switching tube is electrically connected with the battery pack respectively, the controlled end of the first switching tube is the controlled end of the charge equalization circuit 10, and the first switching tube is used for switching on/off the bypass of the battery pack under the control of the main control chip 20.
In this embodiment, the first switching transistor may be a MOS transistor, a triode, or other semiconductor switching devices.
When the battery pack serial components are charged, if the main control chip 20 detects that the voltage value at two ends of any one battery pack is larger than the charging cut-off voltage value, the main control chip 20 outputs a bypass opening control signal to a corresponding first switch tube, and the first switch tube receives the bypass opening control signal and then is conducted, so that when an accessed charging power supply charges the whole battery pack, an output direct current power supply flows to the next battery pack with charging through a bypass where the first switch tube is located.
It can be understood that the BMS module is disposed in each battery pack, and the BMS module necessarily includes a charging management chip, in the prior art, the charging management chip can perform corresponding voltage conversion on the input voltage, and output a set current value to the battery cells in the battery packs, so that the maximum voltage value that each battery pack can bear is necessarily greater than the total voltage value of the series voltage of the connected battery packs. For example, 4 5V battery packs are connected in series, and the voltage value that a single battery pack can withstand is necessarily greater than 20V.
In one embodiment, the charge equalization circuit 10 includes a first MOS transistor Q1; the drain electrode of the first MOS tube Q1 is connected with the positive electrode of the battery pack, the gate electrode of the first MOS tube Q1 is the controlled end of the charge equalization circuit 10, and the source electrode of the first MOS tube Q1 is connected with the negative electrode of the battery pack.
When the battery pack serial component is charged, if the main control chip 20 detects that the voltage value at two ends of any one battery pack is larger than the charging cut-off voltage value, the main control chip 20 outputs a high level to the corresponding first MOS tube Q1, and the grid electrode and the source electrode of the first MOS tube Q1 form a forward voltage difference, so that the first MOS tube Q1 is conducted to provide a bypass for the overvoltage battery pack, and therefore an accessed charging power supply flows to the next battery pack with charging through the bypass of the overvoltage battery pack corresponding to the overvoltage battery pack when the whole battery pack is charged, and the battery pack with charging is not charged any more.
Referring to fig. 1 to 3, in an embodiment, the positive electrode of the battery pack is used for accessing a direct current power supply, and the equalizer for balancing the secondary serial battery further comprises:
the charge equalization circuit 10 is connected in parallel with the battery pack and the charge equalization circuit 10, the controlled end of the charge circuit is electrically connected with the main control chip 20, and the charge equalization circuit 30 is used for discharging part of the electric energy of the corresponding battery pack under the control of the main control chip 20.
In this embodiment, when the series components of the battery packs are discharged, if the main control chip 20 detects that the battery voltage value of any one of the battery packs is greater than the battery voltage values of other battery packs, the main control chip 20 outputs a discharge start control signal to the corresponding discharge equalization circuit 30, the discharge equalization circuit 30 receives the discharge start control signal and then conducts, and shunts the direct current signal output by the overvoltage battery pack, and the redundant electric energy of the battery pack is converted into heat energy consumption through the load component, so that the voltages at two ends of the battery packs are reduced due to the electric energy consumption until the voltages at two ends of the overvoltage battery packs are consistent with the voltages at two ends of other battery packs.
For example, when the battery pack serial assembly discharges, if the main control chip 20 detects that the voltage 4.2V at two ends of the battery pack B1 is greater than the voltage 3.8V at two ends of the battery packs B2 to Bn, the main control chip 20 outputs a B1 discharge start control signal to the discharge equalization circuit 30 corresponding to the battery pack B1, and the discharge equalization circuit 30 discharges the direct current signal output by the battery pack B1 through the load resistor R1, so that the redundant electric energy of the battery pack B1 is converted into heat energy to be consumed, and the output voltage of the battery pack B1 is quickly reduced to 3.8V.
In practical application, when a user faces equipment requiring 36V power supply, 3 12V battery packs are connected with the lead wires for the equalizer, and the equalizer equalizes the 3 battery packs, so that the output voltage of the 3 12V battery packs is kept consistent at all times, and the equipment is supplied with power.
According to the technical scheme, the discharging equalization circuit 30 is adopted, so that when the voltage of two ends of a battery pack is larger than the voltage of two ends of other battery packs in the power supply device due to low power consumption of the battery pack, the discharging equalization circuit 30 is conducted under the control of the main control chip 20, a discharging branch is provided for the over-voltage battery packs, and the excessive electric energy is discharged through the discharging equalization circuit 30 when the battery packs are discharged, so that the excessive electric energy is converted into heat energy to be consumed, the output voltages of the battery packs in the power supply device are consistent, the influence on the battery performance caused by insufficient consistency of individual battery packs is prevented, the performance is attenuated too fast, and the service life of the whole battery pack in the power supply device is further reduced.
Referring to fig. 1 to 3, in an embodiment, the main control chip 20 is further configured to control the discharge equalization circuit 30 to stop discharging a portion of the electric energy of the battery pack when the voltage at both ends of the battery pack, where the overvoltage is detected, falls within a normal operating threshold during the discharging process of the power supply device.
In this embodiment, when the battery pack serial assembly discharges, if the main control chip 20 detects that the battery voltage value of any one battery pack is greater than the battery voltage values of other battery packs, the corresponding discharge equalization circuit 30 discharges the direct current signal output by the over-voltage battery pack under the control of the main control chip 20, so that the voltage at both ends of the battery packs is reduced due to the consumption of electric energy.
When the main control chip 20 detects that the voltage at two ends of the overvoltage battery pack is reduced to be consistent with the voltage at two ends of other battery packs, the main control chip 20 outputs a discharge stopping control signal to the corresponding discharge equalization circuit 30, so that the discharge equalization circuit 30 is disconnected to stop discharging the battery pack. By setting the discharge equalization circuit 30, when any one of the battery packs is discharged due to overvoltage, the discharge of the battery pack can be stopped in time after the voltage of the battery pack is consistent with that of other battery packs, and the battery packs preventing the overvoltage are not timely under-voltage due to stopping, so that the output voltages of a plurality of battery packs in the power supply device are consistent, the influence on the battery performance caused by insufficient consistency of individual battery packs is prevented, the performance is excessively fast attenuated, and the service life of the whole battery pack in the power supply device is further reduced.
Referring to fig. 1 to 5, in an embodiment, the discharge equalization circuit 30 includes:
the discharging circuit is electrically connected with the battery pack and is used for shunting the accessed direct-current power supply so as to discharge part of electric energy of the corresponding battery pack;
the second switching tube is electrically connected with the bleeder circuit and the battery pack respectively, the controlled end of the second switching tube is the controlled end of the discharge equalization circuit 30, and the second switching tube is used for switching on/off the connection between the bleeder circuit and the corresponding battery pack under the control of the main control chip 20.
In this embodiment, the discharge balancing circuit 30 may include a second switching tube and a load component connected in series, where the load component may be a load resistor R1.
When the battery pack serial assembly discharges, if the main control chip 20 detects that the battery voltage value of any one battery pack is larger than the battery voltage values of other battery packs, the main control chip 20 outputs a discharge start control signal to the corresponding second switch tube, the second switch tube receives the discharge start control signal and then is conducted, when the battery pack discharges, the output direct current is shunted by the discharge circuit, and the redundant electric energy of the battery pack is converted into heat energy consumption through the discharge circuit, so that the voltage at two ends of the battery pack is reduced due to the electric energy consumption until the voltage at two ends of the over-voltage battery pack is consistent with the voltage at two ends of other battery packs.
Because the equalizer uses a plurality of battery packs in series when using, the output voltage of the power supply device is the sum of the voltages of the plurality of battery packs, if the output voltage of the battery pack is higher than the output voltages of other battery packs when using the power supply device, for example, three battery packs with rated voltage of 12V are respectively 7V, 9V and 10V, and because the consistency of the output voltages of the plurality of battery packs is insufficient, partial batteries are over-discharged to influence the service life of the batteries, the embodiment adopts the bleeder circuit to shunt the direct current signal output by the over-voltage battery pack, and the redundant electric energy of the battery pack is discharged through the bleeder circuit, so that the voltages at two ends of the over-voltage battery pack and the voltages at two ends of other battery packs are kept consistent.
In one embodiment, the discharge equalization circuit 30 includes a load resistor R1 and a second MOS transistor Q2;
the first end of the load resistor R1 is connected with the positive electrode of the battery pack, and the second end of the load resistor R1 is connected with the drain electrode of the second MOS tube Q2; the gate of the second MOS transistor Q2 is a controlled end of the discharge equalization circuit 30, and the source of the second MOS transistor Q2 is connected to the negative electrode of the battery pack.
When the battery pack serial assembly discharges electricity, if the main control chip 20 detects that the voltage value of two ends of any one battery pack is larger than the voltages of two ends of other battery packs in the power supply device, the main control chip 20 outputs a high level to the corresponding second MOS tube Q2, the grid electrode and the source electrode of the second MOS tube Q2 form a forward voltage difference, so that the second MOS tube Q2 is conducted to provide a discharge branch for the overvoltage battery pack, and therefore when the overvoltage battery pack discharges in a battery, the discharge branch where the second MOS tube Q2 is located shunts the overvoltage battery pack, redundant electric energy of the battery pack is converted into heat energy through the load resistor R1, the voltage of two ends of the battery pack is reduced due to the consumption of the electric energy, the voltage of the two ends of the overvoltage battery pack is consistent with the voltage of the two ends of the other battery packs, the battery pack is prevented from influencing the battery performance due to insufficient consistency, and the service life is shortened.
The utility model also provides a power supply device, which comprises a plurality of battery packs and a BMS module, wherein the BMS module comprises the equalizer for balancing the secondary series battery, the battery pack is any one of a lithium battery pack, a cadmium-nickel battery pack or a hydrogen-nickel battery pack, the battery pack comprises a plurality of battery cells and a battery equalizer, the battery cells are electrically connected with the battery equalizer, and the battery equalizer is used for respectively carrying out battery balancing treatment on the battery cells. The specific structure of the equalizer for balancing secondary series batteries refers to the above embodiments, and since the power supply device adopts all the technical solutions of all the embodiments, the power supply device has at least all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.
The utility model also provides a power supply device, which comprises a plurality of battery packs and the equalizer for balancing the secondary serial batteries, or comprises the power supply device, wherein the specific structure of the equalizer for balancing the secondary serial batteries refers to the embodiment, and the power supply device adopts all the technical schemes of all the embodiments, so that the power supply device at least has all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted.
The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all equivalent structural modifications made by the present description and accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the present utility model.
Claims (9)
1. An equalizer for secondary serial battery balancing, applied to a power supply device, the power supply device comprising a plurality of battery packs connected in series in turn, each of the battery packs comprising a plurality of battery cells, the equalizer for secondary serial battery balancing comprising:
a plurality of charge equalization circuits, each of the charge equalization circuits being configured to be connected in parallel with one of the battery packs;
the voltage detection terminals of the main control chip are electrically connected with the battery packs in a one-to-one correspondence manner, and the output terminals of the main control chip are connected with the controlled terminals of the charge equalization circuits in a one-to-one correspondence manner;
the main control chip is used for detecting the voltage at two ends of each battery pack, and controlling the corresponding charge equalization circuit to bypass the over-voltage battery pack when any one of the battery packs is detected to be over-voltage in the charging process of the power supply device so as to stop charging the battery packs.
2. The equalizer for secondary serial battery balancing of claim 1, wherein the charge equalization circuit comprises:
the first switching tube is respectively and electrically connected with the battery pack, the controlled end of the first switching tube is the controlled end of the charge equalization circuit, and the first switching tube is used for switching on/off a bypass of the battery pack under the control of the main control chip.
3. The equalizer for secondary serial battery balancing of claim 1, wherein the positive electrode of the battery pack is used for switching in a direct current power source, the equalizer for secondary serial battery balancing further comprising:
the charge equalization circuit is respectively connected with the battery pack and the charge equalization circuit in parallel, the controlled end of the charge circuit is electrically connected with the main control chip, and the charge equalization circuit is used for discharging part of electric energy of the corresponding battery pack under the control of the main control chip.
4. The equalizer for secondary series cell balancing of claim 3,
and the main control chip is also used for controlling the discharge equalization circuit to stop discharging the electric energy of the battery pack when the voltage at the two ends of the battery pack, which is detected to be over-voltage, falls into a normal working threshold value in the discharging process of the power supply device.
5. The equalizer for secondary serial cell balancing of claim 3, wherein the discharge equalization circuit comprises:
the discharging circuit is electrically connected with the battery pack and is used for shunting the accessed direct-current power supply so as to discharge part of electric energy of the corresponding battery pack;
the second switching tube is respectively and electrically connected with the bleeder circuit and the battery pack, the controlled end of the second switching tube is the controlled end of the discharge equalization circuit, and the second switching tube is used for switching on/off the connection between the bleeder circuit and the corresponding battery pack under the control of the main control chip.
6. A power supply device comprising a plurality of battery packs and an equalizer for secondary series cell balancing as claimed in any one of claims 1 to 5.
7. The power supply device according to claim 6, wherein the battery pack includes a plurality of battery cells and a BMS module including a battery equalizer electrically connected to the battery cells, the battery equalizer being configured to perform a battery balancing process on the plurality of battery cells, respectively.
8. The power supply device of claim 6, wherein the battery pack is any one of a lithium battery pack, a cadmium-nickel battery pack, or a hydrogen-nickel battery pack.
9. A power supply apparatus comprising a plurality of battery packs and an equalizer for secondary series battery balancing as claimed in any one of claims 1 to 5, or comprising a power supply device as claimed in any one of claims 6 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222142606.1U CN218940706U (en) | 2022-08-12 | 2022-08-12 | Equalizer for secondary series battery balance, power supply device and power supply equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222142606.1U CN218940706U (en) | 2022-08-12 | 2022-08-12 | Equalizer for secondary series battery balance, power supply device and power supply equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218940706U true CN218940706U (en) | 2023-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222142606.1U Active CN218940706U (en) | 2022-08-12 | 2022-08-12 | Equalizer for secondary series battery balance, power supply device and power supply equipment |
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| Country | Link |
|---|---|
| CN (1) | CN218940706U (en) |
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2022
- 2022-08-12 CN CN202222142606.1U patent/CN218940706U/en active Active
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