CN114362273A - Charging system and battery pack - Google Patents
Charging system and battery pack Download PDFInfo
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- CN114362273A CN114362273A CN202111070698.0A CN202111070698A CN114362273A CN 114362273 A CN114362273 A CN 114362273A CN 202111070698 A CN202111070698 A CN 202111070698A CN 114362273 A CN114362273 A CN 114362273A
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Abstract
The invention discloses a charging system and a battery pack, comprising: the first rechargeable battery pack comprises a plurality of first battery cells, and the first battery cells are cylindrical; a second rechargeable battery pack comprising a plurality of second rechargeable cells having a shape different from the first rechargeable cells; a charger for charging the first rechargeable battery pack or the second rechargeable battery pack; the second rechargeable battery pack has a different charging performance than the first rechargeable battery pack. By adopting the technical scheme, the charging compatibility of the charging system and the battery pack can be improved.
Description
Technical Field
The invention relates to a charging system and a battery pack.
Background
Based on the use requirement of portability, more and more electric tools adopt a battery pack as a power source.
The existing battery pack for supplying power to the electric tool mainly adopts cylindrical lithium cells, and the plurality of cylindrical lithium cells are connected in series and parallel to ensure sufficient electric energy output so as to improve the cruising ability of the electric tool. For example, the output voltage of a cylindrical lithium battery cell is about 3.6V, and the maximum number of lithium battery cells connected in series in a battery pack having an output voltage of 18V is 5.
As battery technology advances, the creation of battery packs of higher output voltages, lower impedance chemistries and configurations, and a wide variety of other battery packs is not very convenient for users because the battery packs have to be charged using a specific battery charger specifically designed for each battery pack.
Disclosure of Invention
In order to overcome the defects in the prior art, the present invention provides a charging system and a battery pack, which can improve the charging compatibility of the charging system and the battery pack.
In order to achieve the above object, the present invention adopts the following technical solutions:
a charging system, comprising: the first rechargeable battery pack comprises a plurality of first battery cells, and the first battery cells are cylindrical; a second rechargeable battery pack comprising a plurality of second rechargeable cells having a shape different from the first rechargeable cells; a charger for charging the first rechargeable battery pack or the second rechargeable battery pack; the second rechargeable battery pack has a different charging performance than the first rechargeable battery pack.
Preferably, the charger includes: a charging interface; the first rechargeable battery pack has a first interface adaptable to the charging interface, the second battery pack has a second interface adaptable to the charging interface, and the first interface and the second interface have substantially the same interface shape.
Preferably, the charging performance comprises at least one of the following electrical parameters: at least one of a charging current and a charging voltage.
Preferably, the first rechargeable battery pack has a first internal resistance and the second rechargeable battery pack has a second internal resistance, the second internal resistance being less than the first internal resistance.
Preferably, the charger includes: the charging identification module is used for identifying one of the first rechargeable battery pack or the second rechargeable battery pack accessed by the charging interface; a charging control module configured to: receiving an identification signal of the charging identification module; when the charger is connected into the first rechargeable battery pack, controlling the charger to charge at a first charging current; when the charger is connected into the second rechargeable battery pack, controlling the charger to charge at a second charging current; the second charging current is larger than the first charging current.
Preferably, the charger further comprises: the current control module is connected between the charging interface and the power supply module; when the charging interface is connected with the first rechargeable battery pack, the current control module works to limit the output current of the charger.
Preferably, the charging current of the second rechargeable battery pack is greater than or equal to 80A.
A charging system, comprising: the first rechargeable battery pack comprises a plurality of first battery cells, and the first battery cells are cylindrical; a second rechargeable battery pack comprising a plurality of second rechargeable cells having a shape different from the first rechargeable cells; a charger for charging the first rechargeable battery pack and/or the second rechargeable battery pack; the first rechargeable battery pack is connected to the charger and is charged with a first current; the second rechargeable battery pack is connected to the charger and is charged with a second current.
A rechargeable battery pack, comprising: the battery pack interface is used for accessing a charger; the battery cell group comprises a plurality of rechargeable battery cells connected in series, and the rechargeable battery cells are non-cylindrical; and the current control module is connected with the at least one rechargeable battery cell in series and used for limiting the charging current of the battery cell group according to different chargers connected to the battery pack interface.
Preferably, the different chargers include a first charger having a first charging performance and a second charger having a second charging performance different from the first charging performance.
The invention has the beneficial effect that by adopting the technical scheme, the charging compatibility of the charging system and the battery pack can be improved.
Drawings
Fig. 1 is a schematic configuration diagram of a charging system;
FIG. 2 is a schematic diagram of a second rechargeable battery pack of the charging system of FIG. 1;
fig. 3 is a schematic structural view (without a housing) of a first rechargeable battery pack in the charging system shown in fig. 1;
FIG. 4 is a block circuit diagram of the charging system shown in FIG. 1;
FIG. 5 is a block circuit diagram of the charging system shown in FIG. 1;
fig. 6 is a circuit block diagram of the charging system shown in fig. 1.
Detailed Description
The invention is described in detail below with reference to the figures and the embodiments.
Fig. 1-3 illustrate a charging system 100 including a first rechargeable battery pack 20, a second rechargeable battery pack 30, and a charger 10 that can adapt the first rechargeable battery pack 20 and the second rechargeable battery pack 30 to charge the battery packs.
As shown in fig. 2, the second rechargeable battery pack 30 includes a housing 31, a battery pack 32 and a battery pack interface 33. The housing 31 further includes an upper housing 311 and a lower housing 312, and the upper housing 311 and the lower housing 312 are assembled to form a receiving space to fix and receive the electric core pack 32. A battery pack interface 33 is formed on one upper surface of the housing 31, and the battery pack interface 33 includes a power supply positive interface, a power supply negative interface, and a power supply communication interface. The battery pack charges the electric core group 32 through the positive power interface and the negative power interface; communicates with the charger 10 through a power communication interface.
The electric core group 32 is disposed in the receiving space formed by the housing 31. The battery pack 32 includes a plurality of battery cells 321, and the plurality of battery cells 321 are connected in series, in parallel, or in combination of series and parallel to form the battery pack 32. As shown in fig. 3, the core pack of the first rechargeable battery pack 20 is composed of cylindrical cells, for example, 18650 type batteries. And the cells 321 of the second rechargeable battery pack 30 are shaped differently from the cells 221 of the first rechargeable battery pack 20. In the present embodiment, the battery cells 321 of the second rechargeable battery pack are flat, and the battery cells 321 are sequentially stacked in the vertical direction. In other embodiments, the sheet-like cells may be curved in an arc. Cell 321 also includes a package for packaging the cell to prevent leakage of compounds within the cell. Specifically, the package may be an aluminum plastic film, but is not limited to the aluminum plastic film.
In some embodiments, such as the second rechargeable battery pack 30 shown in fig. 2, the energy density (pack energy/mass) of the electric core pack 32 is greater than 150 Wh/kg. Optionally, the energy density (energy/mass of the battery pack) of the electric core pack 32 is greater than 200 Wh/kg. Optionally, the energy density (energy/mass of the battery pack) of the electric core group 32 ranges from 150Wh/kg to 200 Wh/kg. Optionally, the energy density (energy/mass of the battery pack) of the electric core group 32 ranges from 200Wh/kg to 250 Wh/kg. Optionally, the energy density (energy/mass of the battery pack) of the electric core group 32 ranges from 250wh/kg to 300 wh/kg. Optionally, the energy density (energy/mass of the battery pack) of the electric core group 32 ranges from 300wh/kg to 450 wh/kg.
In some embodiments, the internal cell resistance of the second rechargeable battery pack 30 is less than or equal to 10m Ω. Optionally, the internal resistance of the battery cell of the second rechargeable battery pack 30 is less than or equal to 6m Ω. Optionally, the internal resistance of the battery cell of the second rechargeable battery pack 30 is less than or equal to 3m Ω.
In some embodiments, the charging current of the second rechargeable battery pack 30 is greater than or equal to 80A. Optionally, the charging current of the second rechargeable battery pack 30 is greater than or equal to 100A.
Wherein the first rechargeable battery pack 20 has a first interface 23 that is adaptable to interface with the charger 10 and the second rechargeable battery pack 30 has a second interface 33 that is adaptable to interface with the charger. The first port 23 and the second port 33 have substantially the same port shape. In particular, the interface shape may be configured as a battery pack interface as shown in fig. 1 and 2. Specifically, the battery pack interface is formed on one upper surface of the housing and includes a power supply positive interface, a power supply negative interface, and a power supply communication interface.
The second rechargeable battery pack 30 has a different charging performance compared to the first rechargeable battery pack 20. The first rechargeable battery pack 20 has a first charging capability and the second rechargeable battery pack 30 has a second charging capability. Wherein the charging performance at least comprises at least one of the following electrical parameters: at least one of a charging current and a charging voltage. In addition, the second rechargeable battery pack 30 has a lower internal resistance than the first rechargeable battery pack 20. Specifically, the second rechargeable battery pack 30 is capable of outputting a similar or higher output voltage, but has a lower internal resistance, as compared to the first rechargeable battery pack 20. In this way, the second rechargeable battery pack 30 can withstand higher charging and recharging currents with lower voltage drop and heat buildup, both during and during recharging. In some embodiments, the charging current of the second rechargeable battery pack 30 is equal to or greater than 2.5C, where C represents the charging rate of the second rechargeable battery.
Thus, the existing charger that is compatible with the first rechargeable battery pack 20 is the first charger 101, and the charger that is compatible with the second rechargeable battery pack 30 is the second charger 102. Thus, the first charger 101 is designed to use output low current and low power to power the first rechargeable battery pack 20, and conversely, the second charger 102 can provide more current and power when the second rechargeable battery pack 30 is powered using the second charger 102 than when the first rechargeable battery pack 20 is charged using the first charger 101.
However, when the second rechargeable battery pack 30 is powered by the first charger 101, the first charger 101 will supply power to the second rechargeable battery pack 30 at a current exceeding the rated current, which may result in an increase in the charging time of the second rechargeable battery pack 30, and the first charger 101 may heat up or even be damaged.
Fig. 4 shows a block circuit diagram of the charging system 100 of an embodiment. This charging system 100 includes a rechargeable battery pack (first rechargeable battery pack 20 or second rechargeable battery pack 30) and a charger (first charger 101 or second charger 102). Because the block circuit diagrams of the first rechargeable battery pack and the second rechargeable battery pack are identical, and the block circuit diagrams of the first charger 101 and the second charger 102 are identical, the block circuit diagrams of the first rechargeable battery pack 20 and the first charger 101 are taken as an example for explanation.
The rechargeable battery pack, i.e., the first rechargeable battery pack 20 or the second rechargeable battery pack 30, includes at least a plurality of cells connected in series, 4 cells connected in series are shown in fig. 4, and the rechargeable battery pack may have more than 4 cells, where the number of cells is not limited. The rechargeable battery pack further includes: a power supply positive terminal 21, a power supply negative terminal 22, a power supply communication terminal 23, a power supply identification module 24 and a temperature sensor 25.
The power supply positive terminal 21 and the power supply negative terminal 22 are used to output a discharge current or input a charge current. The power supply communication terminal 23 is used for communication with the charger. Wherein the power supply positive terminal 21 is located in the power supply positive interface, the power supply negative terminal 22 is located in the power supply negative interface, and the power supply communication terminal 23 is located in the power supply communication interface.
The temperature sensor 25 is used for detecting the temperature of the electric core group. In some embodiments, the temperature sensor 25 is connected to the power communication terminal 23. Specifically, the temperature sensor 25 is disposed on the surface of the battery cell 221, and is configured to detect the temperature of the surface of the battery cell 221. The temperature sensor 25 may be a thermistor, such as an NTC or PTC.
The power identification module 24 stores a rechargeable battery pack ID for identifying the first rechargeable battery pack 20 or the second rechargeable battery pack 30 when inserted into the charger. The rechargeable battery pack ID includes, for example, a model number, a version, a cell configuration, and a battery type, such as a cylindrical cell battery or a flat cell battery. The rechargeable battery pack ID may be one or more communication codes, and may also be an ID resistor, an LED display for displaying identification data of the rechargeable battery pack, serial data transmitted when engaged and sensed by the power tool or charger, a field in a frame of data transmitted to the charger through the power communication interface, etc.
The first charger 101 includes a current detection module 1011, a charge amount detection module 1012, a temperature detection module 1013, a charging identification module 1014, a charging control module 1015, a current control module 1016, and further, the charger 101 includes a switch module 1017 for allowing and blocking a charging current, and a power supply module 1018 for adjusting an external power supply to an electric power that can be used for a battery pack and other electronic components or circuits in the charger. Of course, the power detecting module 1012 and the temperature detecting module 1013 may be disposed in a battery pack, and the present invention is not limited thereto.
The current detection module 1011 is used for detecting the charging current of the charger 101. In some embodiments, the current detection module 1011 is a resistor, and detects a voltage applied to the resistor to obtain a charging current flowing into the battery pack.
The power supply module 1018 includes a rectifying circuit and a filtering circuit for rectifying an alternating current from an alternating current power supply and filtering to output a direct current.
The charger 101 further includes an output positive terminal 11, an output negative terminal 12, and a charging communication terminal 13. The output positive terminal 11 and the output negative terminal 12 are used to output a charging current. The charging communication terminal 13 is used for communication with the first rechargeable battery pack 20.
When the first rechargeable battery pack 20 is inserted into the charger 101, the temperature sensor 25 is coupled to the temperature detecting module 1013 of the charger, and the power detecting module 1012 is electrically connected to the positive and negative terminals 21 and 22 at both ends of the battery pack for detecting the power of the battery pack 20.
The charging identification module 1014 is configured to identify one of the first rechargeable battery pack 20 or the second rechargeable battery pack 30 accessed by the charger. The charging identification module 1014 is connected to the charging communication terminal 13. The charging identification module 1014 is able to communicate and sense the battery pack information through the charging communication terminal 23 and the attached battery pack to identify one of the first rechargeable battery pack 20 or the second rechargeable battery pack 30 to which the charger is attached and transmit the identification signal to the charging control module 1015. The information of the battery pack includes a model, a version, a cell configuration, and a battery type, such as a cylindrical cell battery or a flat cell battery. In some embodiments, the charge identification module 1014 is a judgment resistor that divides a reference voltage along with the power identification module. The divided voltage is output as information of the battery pack.
The charging control module 1015 can determine whether the charging interface is connected to the first rechargeable battery pack 20 or the second rechargeable battery pack 30 according to the battery pack information to control the charging current of the charger. The charging control module 1015 sends a current control signal to the current control module 1016 based on the identification signal. In this embodiment, when the charger is connected to the first rechargeable battery pack 20, the charging control module 1015 controls the charger to charge the first rechargeable battery pack 20 with a first charging current; when the charger is connected to the second rechargeable battery pack 30, the charging control module 1015 controls the charger to charge with the second charging current.
The current control module 1016 is used to regulate the charging current to the battery pack, and the current control module 1016 and the charging control module 1015 are communicatively coupled, so that the current control module 1016 is configured to receive a current control signal from the charging control module 1015 to limit the maximum output current from the power supply module or maintain the maximum output current of the power supply module. Specifically, the current control module 1016 includes a power limiting device, the power limiting device may be a passive resistor, the power limiting device may also be an active resistor, and the resistance value of the active resistor may change along with the change of the current control signal, for example, a semiconductor device or a circuit having a current limiting function, such as a field effect transistor, etc.
The switch module 1017 is connected to the charging loop, and coupled to the charging control module 1015, receives a control signal from the charging control module 1015, and switches the switch state to control the on/off of the charging loop.
The specific working process is as follows: the charging identification module 1014 communicates with the attached battery pack through the charging communication terminal 13 and senses the battery pack information to identify one of the first rechargeable battery pack 20 or the second rechargeable battery pack 30 connected to the charger and transmits an identification signal to the charging control module 1015, and the charge amount detection module 1012 and the temperature detection module 1013 also transmit the received charge amount information and the temperature information of the temperature sensor 25 to the charging control module 1015, and after the battery pack information, the charge amount information and the temperature information are internally processed by the charging control module 1015, the charging identification module transmits a current control signal to the current control module 1016 to adjust the charging current, or transmits the current control signal to the switch module 1017 to control the on/off of the charging loop to allow or prohibit the charging current from flowing to the battery pack. In this embodiment, the mode of the charging current is changed by changing the resistance of the current control module 1016. If the resistance of the current control module 1016 changes, there are at least two alternative charging current modes: a first charging current mode in which the current of the first rechargeable battery pack 20 is relatively low, and a second charging current mode in which the charging current is higher than the current of the first charging current mode, wherein the charging current in the first charging mode is the first charging current; the charging current in the second charging mode is a second charging current.
Fig. 5 shows a block circuit diagram of a charging combination 200 as another embodiment, and it is different from the charging combination 100 shown in fig. 4 that the current control module is disposed in the rechargeable battery pack, that is, the first rechargeable battery pack 20 further includes a current control module 26, and the current control module 26 is connected to the power communication terminal 23.
The charging identification module 1014 is configured to identify one of the first rechargeable battery pack 20 or the second rechargeable battery pack 30 accessed by the charger. The charging identification module 1014 is connected to the charging communication terminal 13. The charging identification module 1014 is able to communicate and sense the battery pack information through the charging communication terminal 13 and the attached battery pack to identify one of the first rechargeable battery pack 20 or the second rechargeable battery pack 30 to which the charger is attached and transmit the identification signal to the charging control module 1015. The information of the battery pack includes a model, a version, a cell configuration, and a battery type, such as a cylindrical cell battery or a flat cell battery. In some embodiments, the charge identification module is a judgment resistor that divides the reference voltage together with the power identification module. The divided voltage is output as information of the battery pack.
The charging control module 1015 can determine whether the first rechargeable battery pack 20 or the second rechargeable battery pack 30 is connected to the tool interface according to the battery pack information to control the charging current of the charger. The charging control module 1015 sends a current control signal to the current control module 26 according to the identification signal. In this embodiment, when the charger is connected to the first rechargeable battery pack 20, the charging control module 1015 controls the charger to charge the first rechargeable battery pack 20 with a first charging current; when the charger is connected to the second rechargeable battery pack 30, the charging control module controls the charger to charge the second rechargeable battery pack 30 with the second charging current or the first charging current.
The current control module 26 is used for adjusting the charging current flowing to the cell group. The current control module 26 receives a current control signal from the charging control module 1015 through the power communication terminal 23 to adjust the charging current flowing to the cell group. Specifically, the current control module includes a power limiting device, the power limiting device may be a passive resistor, the power limiting device may also be an active resistor, and a resistance value of the active resistor may change along with a change of the current control signal, for example, a semiconductor device or a circuit having a current limiting function, such as a field effect transistor, and the like. In the present embodiment, when the charger is connected to the first rechargeable battery pack 20, the current control module 26 controls to charge the battery pack with the first charging current; when the charger is connected to the second rechargeable battery pack 30, the charging control module 26 controls the core pack to be charged with the second charging current. Thus, the current control module is configured to receive a current control signal from the charging control module 1015 in order to limit the maximum charging current from the charger or to maintain the maximum charging current from the charger.
The specific working process is as follows: the charging identification module 1014 communicates and senses the battery pack information through the charging communication terminal 13 and the attached battery pack to identify one of the first rechargeable battery pack 20 or the second rechargeable battery pack 30 to which the charger is connected and transmits an identification signal to the charging control module, and the charge amount detection module 1012 and the temperature detection module 1013 also transmit the received charge amount information and the temperature information of the temperature sensor to the charging control module 1015, and the charging control module 1015 internally processes the battery pack information, the charge amount information and the temperature information and transmits a current control signal to the current control module 26 to adjust the charging current or transmits the current control signal to the switch module 1017 to control the on/off of the charging circuit to allow or prohibit the charging current from flowing to the battery pack. In the present embodiment, the mode of the charging current is changed by changing the resistance of the current control module. If the resistance of the current control module changes, there are at least two alternative charging current modes: a first charging current mode in which the current of the first rechargeable battery pack 20 is relatively low, and a second charging current mode in which the charging current is higher than the current of the first charging current mode, wherein the charging current in the first charging mode is the first charging current; the charging current in the second charging mode is a second charging current.
Fig. 6 shows a circuit block diagram of a charging combination 300 as another embodiment, and different from the charging combination 100 shown in fig. 4, the charging control module 27 is disposed in a rechargeable battery pack, that is, the rechargeable battery pack includes the charging control module 27, and the charging control module 27 can control the switch module 1017 to be turned on and off through the communication terminal 23.
The power identification module 24 is used to identify one of the first charger 101 or the second charger 102 to which the rechargeable battery pack is connected. The power identification module 24 is connected to the power communication terminal 23. The power identification module 24 is capable of communicating and sensing charger information through the power communication terminal 23 and the attached charger to identify one of the first charger 101 or the second charger 102 to which the rechargeable battery pack is attached and to transmit an identification signal to the charging control module 27. The charger information includes a charging voltage, a charging current, and the like.
The charging control module 27 can determine whether the power interface is connected to the first charger 101 or the second charger 102 according to the battery pack information to control the charging current of the battery pack. The charging control module 27 sends a current control signal to the current control module according to the identification signal.
The current control module 26 is used for adjusting the charging current flowing to the cell group. The current control module 26 receives a current control signal from the charging control module 27 through the power communication terminal 23 to adjust the charging current flowing to the cell group. Specifically, the current control module 26 includes a power limiting device, the power limiting device may be a passive resistor, the power limiting device may also be an active resistor, and the resistance value of the active resistor may change along with the change of the current control signal, for example, a semiconductor device or a circuit having a current limiting function, such as a field effect transistor, and the like.
Thus, when the first rechargeable battery pack 20 is connected to the first charger 101, the first charger 101 is charged with a first charging current. Specifically, when the first rechargeable battery pack 20 is powered by the first charger 101, the power identification module 24 sends an identification signal to the charging control module 27 to indicate that the first rechargeable battery pack 20 is attached to the first charger 101, and then the charging control module 27 sends a first current control signal to the current control module 26 to enable the current output by the current control module 26 to the cell group to maintain the first charging current from the first charger 101; when the first rechargeable battery pack 20 is connected to the second charger 102, the power identification module 24 identifies the second charger 102 connected thereto, sends an identification signal to the charging control module 27 to indicate that the first rechargeable battery pack 20 is attached to the second charger 102, and then the charging control module 27 sends a second current control signal to the current control module 26 to enable the current control module 26 to limit the charging current from the second charger 102, so that the current output by the current control module 26 to the cell group is not greater than the first charging current, thereby preventing the first rechargeable battery pack 20 from being damaged due to overcharge.
In addition, when the second rechargeable battery pack 30 is connected to the first charger 101, the power identification module 24 sends an identification signal to the charging control module 27 to indicate that the first charger 101 is attached to the second rechargeable battery pack 30, and then the charging control module 27 sends a first current control signal to the current control module 26 to enable the current output by the current control module 26 to the battery pack to maintain the first charging current from the first charger 101, so as to prevent the first charger 101 from supplying power to the second rechargeable battery pack 30 at a current exceeding the rated current and causing heat damage to the first charger 101; when the second rechargeable battery pack 30 is connected to the second charger 102, the power identification module 24 sends an identification signal to the charging control module 27 to indicate that the second rechargeable battery pack 30 is attached to the second charger 102, and the charging control module 27 sends a third control signal to the current control module 26 to enable the current control module 26 to control the current output to the cell group to maintain the second charging current from the second charger 102.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.
Claims (10)
1. A charging system, comprising:
the first rechargeable battery pack comprises a plurality of first battery cells, and the first battery cells are cylindrical;
a second rechargeable battery pack comprising a plurality of second rechargeable cells having a shape different from the first rechargeable cells;
a charger for charging the first rechargeable battery pack or the second rechargeable battery pack;
the second rechargeable battery pack has a different charging performance than the first rechargeable battery pack.
2. The charging system according to claim 1,
the charger includes: a charging interface;
the first rechargeable battery pack has a first interface adaptable to the charging interface, the second rechargeable battery pack has a second interface adaptable to the charging interface, and the first interface and the second interface have substantially the same interface shape.
3. The charging system according to claim 1,
the charging performance includes at least the following electrical parameters: a charging current or a charging voltage.
4. The charging system according to claim 1,
the first rechargeable battery pack has a first internal resistance and the second rechargeable battery pack has a second internal resistance that is less than the first internal resistance.
5. The charging system according to claim 1,
the charger includes:
the charging identification module is used for identifying one of the first rechargeable battery pack or the second rechargeable battery pack accessed by the charging interface;
a charging control module configured to:
receiving an identification signal of the charging identification module;
when the charger is connected into the first rechargeable battery pack, controlling the charger to charge at a first charging current;
when the charger is connected into the second rechargeable battery pack, controlling the charger to charge at a second charging current;
the second charging current is larger than the first charging current.
6. The charging system according to claim 1,
the charger further comprises:
the current control module is connected between the charging interface and the power supply module;
when the charging interface is connected with the first rechargeable battery pack, the current control module works to limit the output current of the charger.
7. The charging system according to claim 1,
the charging current of the second rechargeable battery pack is greater than or equal to 80A.
8. A charging system, comprising:
the first rechargeable battery pack comprises a plurality of first battery cells, and the first battery cells are cylindrical;
a second rechargeable battery pack comprising a plurality of second rechargeable cells having a shape different from the first rechargeable cells;
a charger for charging the first rechargeable battery pack and/or the second rechargeable battery pack;
the first rechargeable battery pack is connected to the charger and is charged with a first current;
the second rechargeable battery pack is connected to the charger and is charged with a second current.
9. A rechargeable battery pack, comprising:
the battery pack interface is used for accessing a charger;
the battery cell group comprises a plurality of rechargeable battery cells connected in series, and the rechargeable battery cells are non-cylindrical;
and the current control module is connected with the at least one rechargeable battery cell in series and used for limiting the charging current of the battery cell group according to different chargers connected to the battery pack interface.
10. The rechargeable battery pack according to claim 9,
the charger includes a first charger having a first charging performance and a second charger having a second charging performance different from the first charging performance.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020110617516 | 2020-09-30 | ||
| CN202011061751 | 2020-09-30 |
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| CN114362273A true CN114362273A (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111070698.0A Pending CN114362273A (en) | 2020-09-30 | 2021-09-13 | Charging system and battery pack |
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| CN (1) | CN114362273A (en) |
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- 2021-09-13 CN CN202111070698.0A patent/CN114362273A/en active Pending
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