CN110571888A - battery pack control method and device and electrical equipment - Google Patents
battery pack control method and device and electrical equipment Download PDFInfo
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- CN110571888A CN110571888A CN201910923028.5A CN201910923028A CN110571888A CN 110571888 A CN110571888 A CN 110571888A CN 201910923028 A CN201910923028 A CN 201910923028A CN 110571888 A CN110571888 A CN 110571888A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
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Abstract
the invention is suitable for the technical field of batteries, and provides a battery pack control method, a device and electrical equipment, wherein the method comprises the steps of detecting the current flow direction in real time; when the current flowing direction is from the cathode of the battery to the cathode of the port, the current charging current is detected; judging whether the current magnitude of the current charging is larger than a first current threshold value; if so, disconnecting the direct current path between the battery cathode and the port cathode, and communicating the current-limiting path between the battery cathode and the port cathode so as to perform current-limiting operation. The invention limits the magnitude of the charging current flowing to the battery pack when the charging current is detected to be larger than the first current threshold value, so that the charging current is in a safe charging current range, avoids the problems of high current generation between the battery packs and safety risks caused by different voltages in parallel connection between the two battery packs, and solves the problem that random parallel connection between a plurality of battery packs is difficult to realize.
Description
Technical Field
the invention belongs to the technical field of batteries, and particularly relates to a battery pack control method and device and electrical equipment.
background
With the development of electronic technology, more and more products need to be powered by battery packs, and with the wide application of lithium battery packs for providing power to direct current devices, the capacity of the battery packs is often required to be increased to meet the requirements of prolonged service time, increased power and the like.
The existing common solution is to use two or more lithium battery packs in parallel to form a battery system, thereby increasing the battery capacity. However, this has a problem in that the voltages required for the two lithium battery packs to be connected in parallel must be very similar because the internal resistances of the batteries are very small. Otherwise, if two lithium battery packs have the difference because self discharge effect or self state of charge and lead to under the too big condition of voltage difference, will make heavy current produce to lead to the condition of fuse fusing, protection shield inefficacy, battery package overheat among the lithium battery pack.
therefore, the existing lithium battery packs can be connected in parallel only after being charged or discharged until the voltages are equal, but it is difficult for users to completely equalize the charging and discharging voltages of a plurality of lithium battery packs. Meanwhile, the voltage of the two lithium battery packs can fall back after the charging of the lithium battery packs is finished, and the voltages of the two lithium battery packs are not equal easily, so that the conventional battery packs are difficult to realize random parallel connection and need a large number of additional devices for supporting.
Disclosure of Invention
The embodiment of the invention aims to provide a battery pack control method, and aims to solve the problem that random parallel connection among a plurality of battery packs is difficult to realize in the prior art.
the embodiment of the invention is realized in such a way that a battery pack control method comprises the following steps:
Detecting the current flow direction in real time;
When the current flowing direction is from the cathode of the battery to the cathode of the port, the current charging current is detected;
judging whether the current magnitude of the current charging is larger than a first current threshold value;
If so, disconnecting the direct current path between the battery cathode and the port cathode, and communicating the current-limiting path between the battery cathode and the port cathode so as to perform current-limiting operation.
Further, the step of determining whether the current magnitude of the present charge is greater than the first current threshold further includes:
And when the current charged at present is judged to be smaller than the first current threshold, disconnecting the current-limiting passage between the cathode of the battery and the cathode of the port, and communicating the direct current passage between the cathode of the battery and the cathode of the port so as to normally operate.
Further, after the step of detecting the current flowing in real time, the method further includes:
When the current flowing from the port cathode to the battery cathode is detected, detecting the current magnitude of current discharging;
Judging whether the current magnitude of the current discharge is larger than a second current threshold value;
if so, disconnecting a direct current path and a current limiting path between the cathode of the battery and the cathode of the port so as to prohibit operation;
and if not, communicating a direct current path between the battery cathode and the port cathode.
further, when the current flowing from the negative electrode of the battery to the negative electrode of the port is detected, the step of detecting the current magnitude of the current currently charged comprises:
when the current flowing direction is from the cathode of the battery to the cathode of the port, judging whether a communication signal sent by the communication port is received;
if so, connecting a direct current path between the cathode of the battery and the cathode of the port, and disconnecting a current-limiting path between the cathode of the battery and the cathode of the port so that the charger can normally charge the battery pack;
if not, detecting the current magnitude of the current charging.
Furthermore, after the step of disconnecting the dc path between the battery negative electrode and the port negative electrode and connecting the current limiting path between the battery negative electrode and the port negative electrode, the method includes:
when the current flowing direction is detected to be from the battery cathode to the port cathode and the current magnitude of the current charged is detected to be smaller than the third current threshold, the direct current path communicated between the battery cathode and the port cathode is switched, and the current limiting path between the battery cathode and the port cathode is disconnected, so that the normal operation is realized.
another embodiment of the present invention also provides a battery pack control apparatus, including:
The first detection module is used for detecting the current flow direction in real time;
the second detection module is used for detecting the current magnitude of the current charging when the current flowing direction is from the cathode of the battery to the cathode of the port;
The first judging module is used for judging whether the current magnitude of the current charging is larger than a first current threshold value;
and the first control module is used for disconnecting the direct current path between the cathode of the battery and the cathode of the port and communicating the current-limiting path between the cathode of the battery and the cathode of the port to enable the current-limiting operation when the first judging module judges that the current magnitude of the current charged is greater than the first current threshold value.
still further, the apparatus further comprises:
and the second control module is used for disconnecting the current-limiting passage between the cathode of the battery and the cathode of the port and communicating the direct current passage between the cathode of the battery and the cathode of the port to enable the battery to normally operate when the first judging module judges that the current magnitude of the current charged is smaller than the first current threshold value.
Still further, the apparatus further comprises:
the third detection module is used for detecting the current magnitude of current discharging when the current flowing direction is from the port cathode to the battery cathode;
The second judgment module is used for judging whether the current magnitude of the current discharge is greater than a second current threshold value;
the third control module is used for disconnecting a direct current path and a current limiting path between the negative electrode of the battery and the negative electrode of the port to inhibit operation when the second judging module judges that the current magnitude of the current for discharging is larger than the second current threshold;
and the fourth control module is used for communicating a direct current path between the cathode of the battery and the cathode of the port when the second judging module judges that the current discharged current is smaller than the second current threshold.
still further, the second detection module comprises:
The first judging unit is used for judging whether a communication signal sent by a communication port is received or not when the current flowing direction is from the cathode of the battery to the cathode of the port;
the first control unit is used for connecting a direct current path between the negative electrode of the battery and the negative electrode of the port and disconnecting a current-limiting path between the negative electrode of the battery and the negative electrode of the port when the first judging unit judges that a communication signal sent by the communication port is received, so that the battery pack is normally charged by the charger;
and the second control unit is used for detecting the current magnitude of the current charging when the first judging unit judges that the communication signal sent by the communication port is not received.
Still further, the apparatus further comprises:
And the fifth control module is used for switching a direct current path between the battery cathode and the port cathode and disconnecting a current limiting path between the battery cathode and the port cathode to enable the battery to normally operate when the current flowing direction is detected to be from the battery cathode to the port cathode and the current magnitude of the current charged is detected to be smaller than a third current threshold value.
another embodiment of the present invention further provides an electrical apparatus, wherein the electrical apparatus includes the battery pack control device.
The battery pack control method provided by the embodiment of the invention detects the current flow direction in real time, when the current flow direction is from the battery cathode to the port cathode, when the current value of the current is larger than the first current threshold value, the direct current path between the cathode of the battery and the cathode of the port is disconnected, the current-limiting path between the cathode of the battery and the cathode of the port is connected, so as to limit the current and operate, limit the charging current flowing to the battery pack to be in the safe charging current range, avoid the problems of large current and safety risk caused by different voltages in parallel connection between the two battery packs, therefore, the two battery packs can be connected in parallel when the voltages are unequal without causing safety risks, random parallel connection between the two battery packs is realized, and the problem that random parallel connection between a plurality of existing battery packs is difficult to realize is solved.
drawings
Fig. 1 is a schematic flow chart illustrating a battery pack control method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating a battery pack control method according to another embodiment of the present invention;
Fig. 3 is a block diagram of a battery pack control apparatus according to an embodiment of the present invention;
fig. 4 is a block diagram of a battery pack control apparatus according to another embodiment of the present invention;
Fig. 5 is a topology circuit diagram of a specific circuit implementation of the battery pack control method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
in the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
according to the invention, by detecting the current flow direction in real time, when the current flow direction is from the battery cathode to the port cathode and the current charging current is larger than the first current threshold value, the direct current path between the battery cathode and the port cathode is disconnected, and the current limiting path between the battery cathode and the port cathode is communicated, so that the current limiting operation is realized, the charging current flowing to the battery pack can be limited, and the battery pack is in a safe charging current range, therefore, the two battery packs can be connected in parallel without causing safety risk when the voltages are not equal, and the random parallel connection between the two battery packs is realized.
Example one
Fig. 1 is a flowchart illustrating a method for controlling a battery pack according to an embodiment of the present invention, and only a portion related to the embodiment of the present invention is shown for convenience of description. The battery pack control method comprises the following steps:
step S11, detecting the current flow direction in real time;
In an embodiment of the present invention, the battery pack control method is applied to a battery pack, and is used for detecting a charging/discharging state when the battery pack is connected to an external device, where the external device may be a charger (adapter), a load, another battery pack, or the like, and when the external device is different, the state in the battery pack is also different.
For example, when the battery pack is connected to an external device, specifically an adapter, the battery pack is in a charging state, that is, the current in the battery pack flows from the positive terminal of the port of the battery pack to the positive terminal of the battery, and flows from the negative terminal of the battery to the negative terminal of the port, so that the battery pack is charged.
when the battery pack is connected with external equipment which is specifically a load, the battery pack is in a discharging state at the moment, namely the current in the battery pack flows from the battery anode of the battery pack to the port anode so as to flow into the load, flows from the load to the port cathode connected with the load and then flows to the battery cathode, and finally discharging of the battery pack is achieved.
As shown in fig. 5, the topology circuit is a topology circuit implemented by a specific circuit of the battery pack control method provided in the embodiment of the present invention, and the topology circuit includes a battery pack, a detection module connected to a battery cathode of the battery pack, and a main control unit, a dc path, and a current limiting path connected to the detection module; the battery pack comprises a battery pack, a port, a detection module, a direct current path, a current limiting path and a current limiting path, wherein the battery anode of the battery pack is directly connected with the port anode, one ends of the direct current path and the current limiting path are both connected with the detection module, the other ends of the direct current path and the current limiting path are both connected with the port cathode of the battery pack, and the detection module is used for detecting the current direction between the battery cathode of the battery pack and the port cathode so as to determine the current state of the.
The detection module is further configured to detect a magnitude of a current flowing through the battery pack and a magnitude of a voltage of the battery pack, and the detection module detects a magnitude of a current flow direction and a magnitude of a current voltage flowing through the battery pack and then sends the magnitude of the current flow direction and the magnitude of the current voltage to the main control unit, so that the main control unit performs corresponding control according to information detected by the detection module.
The direct current path is provided with a first control switch S1, and the main control unit controls the on-off state of the direct current path by controlling the on-off state of the first control switch S1; the current limiting path is provided with a second control switch S2 and a current limiting module, wherein the main control unit controls the on-off state of the current limiting path by controlling the on-off state of the second control switch S2, and when the current limiting path is switched on, the current limiting path can limit the current flowing from the battery cathode of the battery pack to the port cathode by the current limiting function of the current limiting module.
further, in the embodiment of the present invention, the detecting module may be a current and voltage collecting module for collecting current and voltage and a current flowing direction, and it can be understood that in other embodiments of the present invention, the detecting module may also be other detecting devices for detecting current and voltage, which is not limited herein.
further, in the embodiment of the present invention, the main control unit may be a Micro Control Unit (MCU) configured to obtain information acquired and detected by the detection module and correspondingly control the on-off states of the dc path and the current limiting path, and specifically, the main control unit performs corresponding control according to the battery pack control method provided in the embodiment of the present invention.
Furthermore, in the embodiment of the present invention, the detection module detects the flow direction of the current in real time, at this time, the battery pack has three states, namely, a charging state, a discharging state, and a non-working state, and when the detection module detects that the flow direction of the current flows from the negative electrode of the battery to the negative electrode of the port, the current is determined to be the charging state; when the detection module detects that the current flows to the port cathode and the current cathode, the discharge state is determined; and when the detection module does not detect the current flowing direction, determining that the current flowing direction is in a non-working state.
step S12, when the current flowing direction is from the negative pole of the battery to the negative pole of the port, the current charging is detected;
In an embodiment of the present invention, when the detection module detects that the current flows from the negative electrode of the battery to the negative electrode of the port, the main control unit may determine that the battery pack is in the charging state, and the battery pack may be charged by the adapter or may be charged by other battery packs in parallel, so that the detection module detects the charging current of the battery pack in the charging state at the same time.
Step S13, judging whether the current magnitude of the current charging is larger than a first current threshold value;
When the current magnitude of the current charging is judged to be greater than the first current threshold, step S14 is executed;
when the current magnitude of the current charging is judged to be smaller than the first current threshold value, the main control unit can determine that the current of the current charging of the battery pack is within a safe current range, and the normal charging of the battery pack can be realized.
it should be noted that, the first current threshold is a safety threshold for charging a battery pack, for example, 100A, where when the current battery pack is normally connected to the adapter, the current currently charged current is within the range of the first current threshold for normal charging; when current battery package and other battery package parallel connection, and the voltage of current battery package is far less than the voltage of other battery packages, other battery packages can charge so that both voltages can realize parallelly connected common charge-discharge simultaneously, nevertheless when other battery packages carry out charging process to current battery package, form heavy current and cause the safety risk between the two. Therefore, when the detection module detects that the battery pack is in the charging state, the main control unit of the detection module needs to control the detection module to detect and judge whether the current charging current of the battery pack is greater than the first current threshold.
step S14, disconnecting the direct current path between the battery cathode and the port cathode, and connecting the current-limiting path between the battery cathode and the port cathode to enable current-limiting operation;
in an embodiment of the present invention, when the main control unit obtains that the charging current detected by the detection module is greater than the first current threshold, the main control unit controls the first control switch S1 to be turned off to disconnect the dc path between the negative electrode of the battery and the negative electrode of the port, and controls the second control switch S2 to be turned on to connect the current-limiting path between the negative electrode of the battery and the negative electrode of the port, so that the battery pack performs current-limiting charging. The two battery packs can be connected in parallel when the voltages are not equal without causing safety risk, and random parallel connection between the two battery packs is realized.
in this embodiment, through the real-time detection current flow direction, the current flow direction is from the battery negative pole to the port negative pole, and when the current magnitude of current that charges is greater than the first current threshold, break off the direct current route between battery negative pole and the port negative pole, communicate the current-limiting route between battery negative pole and the port negative pole, so that the current-limiting operation, make the charging current magnitude that can restrict to flow to the battery package, so that it is in safe charging current within range, avoid connecting in parallel between two current battery packages and produce the heavy current because the battery package that the voltage difference leads to produces, and the problem of the safe risk of production, consequently make two battery packages also can connect in parallel and do not cause the safe risk when the voltage is unequal, realize connecting in parallel wantonly between the two, the problem of being difficult to realize connecting in parallel wantonly between a plurality of current battery packages has been.
example two
please refer to fig. 2, which is a flowchart illustrating a battery pack control method according to a second embodiment of the present invention, wherein only the relevant portions according to the second embodiment of the present invention are shown for convenience of description. The battery pack control method comprises the following steps:
step S21, detecting the current flow direction in real time;
step S22, when the current flowing direction is from the negative pole of the battery to the negative pole of the port, the current charging is detected;
In an embodiment of the present invention, when it is detected that the current flows from the negative electrode of the battery to the negative electrode of the port, the detecting the current magnitude of the present charge may further include:
when the current flowing direction is detected to be from the negative electrode of the battery to the negative electrode of the port, judging whether a communication signal sent by the communication port is received;
If yes, connecting a direct current path between the negative electrode of the battery and the negative electrode of the port, and disconnecting a current-limiting path between the negative electrode of the battery and the negative electrode of the port so that the charger can normally charge the battery pack;
and (III) if not, detecting the current magnitude of the current charging.
it should be noted that, in most of the existing battery packs, in addition to the positive electrode and the negative electrode, a communication terminal for communicating with the adapter is further provided to implement charging communication when the battery pack is connected with the adapter, at this time, when the detection module detects that the battery flow direction is from the battery negative electrode to the port negative electrode, the main control unit thereof determines whether a communication signal sent by the communication port is received, and when the communication signal is received, it can be determined that the battery pack is charged by the adapter, so that the main control unit controls the first control switch S1 to be closed to connect the direct current path between the battery negative electrode and the port negative electrode, and controls the second control switch S2 to be opened to disconnect the current-limiting path between the battery negative electrode and the port negative electrode, so that the battery pack is normally charged; the main control unit does not receive the communication signal sent by the communication port, and at the moment, the current magnitude of the current charging of the battery pack needs to be acquired and detected through the detection module.
Step S23, judging whether the current magnitude of the current charging is larger than a first current threshold value;
when the current magnitude of the current charging is judged to be larger than the first current threshold, step S24 is executed; otherwise, step S25 is executed.
Step S24, disconnecting the direct current path between the battery cathode and the port cathode, and connecting the current-limiting path between the battery cathode and the port cathode to enable current-limiting operation;
in an embodiment of the present invention, the step of disconnecting the dc path between the battery negative electrode and the port negative electrode and connecting the current limiting path between the battery negative electrode and the port negative electrode to enable current limiting operation further includes:
When the current flowing direction is detected to be from the battery cathode to the port cathode and the current magnitude of the current charged is detected to be smaller than the third current threshold, the direct current path communicated between the battery cathode and the port cathode is switched, and the current limiting path between the battery cathode and the port cathode is disconnected, so that the normal operation is realized.
in an embodiment of the present invention, since the current magnitude of the current charging is greater than the first current threshold, the main control unit determines that the current battery pack is connected in parallel with other battery packs having larger voltages, and therefore the main control unit controls the first control switch S1 to be turned off, and the second control switch S2 to be turned on, so as to perform current-limiting charging, and at this time, in the charging process, the voltages between the two battery packs gradually tend to be consistent, and therefore the current of the current charging will be gradually detected, and when the current of the current charging is reduced to be less than the current-limiting current limited by the current-limiting module, the main control unit switches the first control switch S1 to be turned on, and the second control switch S2 to be turned off, so as to perform normal charging.
For example, the charging current limited by the current limiting module is 2A, at the moment that the current of the current battery pack is connected in parallel with other battery packs, when the current of the current battery pack charging is greater than a first current threshold (i.e. 100A), the main control unit controls the current limiting path to be on, so that the current limiting operation is performed, at this moment, the safety problem caused by the overlarge charging current for charging the current battery pack can be avoided, at this moment, in the current limiting charging process, the charging current gradually decreases, and when the current of the current limiting path decreases to be less than 2A limited by the current limiting module, the current limiting path has the same effect as the direct current path, so that the main control unit controls the first control switch S1 to be on, and the second control switch S2 to be off, so that the normal charging is performed. The problem that the external equipment cannot be normally driven due to the fact that the current limiting channel is conducted to enable discharging current required by the operation of the external equipment to be incapable of being provided when the follow-up charging of the current battery pack is completed and the two battery packs connected in parallel need to discharge the external equipment is solved.
and step S25, disconnecting the current limiting path between the battery cathode and the port cathode, and connecting the direct current path between the battery cathode and the port cathode to enable the battery to normally operate.
When the current magnitude of the current charging is smaller than the first current threshold value, the main control unit can determine that the current of the current charging of the battery pack is within a safe charging current range, at the moment, the main control unit controls the first control switch S1 to be closed, and the second control switch S2 to be opened, so that the direct current path is switched on, the current limiting path is switched off, and the normal charging of the battery pack is realized.
Step S26, when the current flowing from the port cathode to the battery cathode is detected, the current discharging current is detected;
in an embodiment of the present invention, when the detection module detects that the current flows from the port cathode to the battery cathode, the main control unit may determine that the battery pack is in a discharging state, and the battery pack may discharge an external load or may be discharged by connecting other battery packs in parallel, so that the detection module detects the discharging current of the battery pack in the discharging state at the same time.
step S27, judging whether the current magnitude of the current discharge is larger than a second current threshold value;
And executing step S28 when the current magnitude of the current discharge is judged to be larger than the second current threshold, otherwise executing step S29.
Step S28, disconnecting the DC path and the current-limiting path between the battery cathode and the port cathode to prohibit the operation;
in an embodiment of the present invention, when the discharge current acquired by the main control unit and detected by the detection module is greater than the second current threshold, the main control unit controls the first control switch S1 to be turned off, and the second control switch S2 to be turned off, so that the battery pack is prohibited from operating.
When the main control unit obtains that the discharging current detected by the detection module is greater than the second current threshold, the battery pack is controlled to be forbidden to operate so as to protect the battery pack. And when the main control unit obtains that the discharge current detected by the detection module is smaller than the second current threshold value, controlling the battery pack to normally operate, and realizing the normal operation of the battery pack at the moment. It should be noted that, during the discharging process of the battery pack, the conduction of the current limiting path is not controlled. The current limiting circuit is used for avoiding the problem that the current limiting circuit can not drive the external equipment to normally work after the current limiting circuit is controlled to be conducted due to overlarge current at the moment of electrifying the external equipment.
step S29, communicating a direct current path between the battery cathode and the port cathode;
When the current discharged current is judged to be smaller than the second current threshold, the main control unit can determine that the current discharged current of the battery pack is within a safe current range, and normal discharge of the battery pack can be achieved.
it should be noted that, the execution sequence of the steps S22-S25 and S26-S29 is not strict, so it can be understood that, in step S21, when it is detected that the current flows from the battery negative electrode to the port negative electrode, the implementation steps S22-S25 are executed; when it is detected that the current flows to the port negative to the battery negative, it performs the implementation steps of steps S26-S29.
In the embodiment, by detecting the current flowing direction in real time, when the current flowing direction is from the battery cathode to the port cathode and the current charging current is greater than the first current threshold, the direct current path between the battery cathode and the port cathode is disconnected, and the current limiting path between the battery cathode and the port cathode is communicated, so that the current is limited to operate, and the charging current flowing to the battery pack can be limited to be within the safe charging current range; when the current flows from the port cathode to the battery cathode and the current of the current discharge is larger than the second current threshold, the direct current path and the current-limiting path between the battery cathode and the port cathode are disconnected, so that the operation is forbidden, and the problem of safety risk caused by large current can be avoided when the external load is in short circuit.
EXAMPLE III
Fig. 3 is a schematic block diagram of a battery pack control apparatus according to a third embodiment of the present invention, and only the relevant portions of the battery pack control apparatus according to the third embodiment of the present invention are shown for convenience of description. The battery pack control device 30 includes:
the first detection module 31 is used for detecting the current flowing direction in real time;
The second detection module 32 is configured to detect a current magnitude of current currently being charged when it is detected that a current flow direction is from a battery negative electrode to a port negative electrode;
The first judging module 33 is configured to judge whether the current magnitude of the current charging is greater than a first current threshold;
The first control module 34 is configured to disconnect the direct current path between the negative electrode of the battery and the negative electrode of the port and connect the current limiting path between the negative electrode of the battery and the negative electrode of the port to enable current limiting operation when the first determining module 33 determines that the current magnitude of the current to be charged is greater than the first current threshold.
The implementation principle and the technical effects of the battery pack control device provided by the embodiment of the invention are the same as those of the method embodiment, and for the sake of brief description, no part of the embodiment of the device is mentioned, and reference may be made to the corresponding contents in the method embodiment.
example four
Fig. 4 is a schematic block diagram of a battery pack control apparatus according to a fourth embodiment of the present invention, and only the relevant portions of the battery pack control apparatus according to the fourth embodiment of the present invention are shown for convenience of description. For convenience of explanation, only portions related to the embodiments of the present invention are shown. The implementation principle and the generated technical effects are the same as those of the third embodiment, and for the sake of brief description, no mention is made to the third embodiment of the present invention, and the corresponding contents in the third embodiment can be referred to.
The difference is that, in one embodiment of the present invention, the battery pack control device 30 further includes:
And the second control module 35 is configured to disconnect the current-limiting path between the negative electrode of the battery and the negative electrode of the port and connect the direct-current path between the negative electrode of the battery and the negative electrode of the port to enable normal operation when the first determining module 33 determines that the current magnitude of the current currently being charged is smaller than the first current threshold.
further, in one embodiment of the present invention, the battery pack control device 30 further includes:
the third detection module 36 is configured to detect a current magnitude of current currently discharged when it is detected that the current flow is from the port negative electrode to the battery negative electrode;
a second judging module 37, configured to judge whether the current magnitude of the current discharge is greater than a second current threshold;
the third control module 38 is configured to disconnect the dc path and the current limiting path between the negative electrode of the battery and the negative electrode of the port to prohibit operation when the second determining module 37 determines that the current magnitude of the current for discharging is greater than the second current threshold;
And the fourth control module 39 is configured to communicate the dc path between the negative electrode of the battery and the negative electrode of the port when the second determining module 37 determines that the current magnitude of the current discharge is smaller than the second current threshold.
Further, in one embodiment of the present invention, the battery pack control device 30 further includes:
the fifth control module 310 is configured to switch a direct current path between the negative electrode of the battery and the negative electrode of the port and disconnect a current-limiting path between the negative electrode of the battery and the negative electrode of the port to enable normal operation when it is detected that the current flowing direction is from the negative electrode of the battery to the negative electrode of the port and it is detected that the current magnitude of the current charging is smaller than the third current threshold.
Further, in one embodiment of the present invention, the second detection module 32 includes:
A first judging unit 321, configured to judge whether a communication signal sent by a communication port is received when it is detected that a current flows from a battery cathode to a port cathode;
the first control unit 322 is configured to, when the first determining unit 321 determines that the communication signal sent by the communication port is received, connect the dc path between the negative electrode of the battery and the negative electrode of the port, and disconnect the current-limiting path between the negative electrode of the battery and the negative electrode of the port, so that the battery pack is normally charged by the charger;
the second control unit 323 is configured to detect a current magnitude of the current when the first determining unit 321 determines that the communication signal sent by the communication port is not received.
The implementation principle and the technical effects of the battery pack control device provided by the embodiment of the invention are the same as those of the method embodiment, and for the sake of brief description, no part of the embodiment of the device is mentioned, and reference may be made to the corresponding contents in the method embodiment.
EXAMPLE five
A fifth embodiment of the present invention further provides an electrical apparatus, which includes a battery pack control device and a battery pack connected to the battery pack control device, where the battery pack control device is the battery pack control device in any of the above embodiments.
in other embodiments, the electrical device may further include a memory and a computer program stored in the memory and executable on the processor, and when the battery pack control apparatus executes the computer program, the battery pack control method according to any of the above embodiments is implemented.
the electrical equipment in the embodiment of the invention controls to disconnect the direct current path between the cathode of the battery and the cathode of the port and connect the current-limiting path between the cathode of the battery and the cathode of the port to perform current-limiting operation by detecting the current flowing direction and when the current flowing direction is from the cathode of the battery to the cathode of the port and the current of the current charged is larger than the first current threshold value, so that the magnitude of the charging current flowing to the battery pack can be limited to be within a safe charging current range, therefore, the two battery packs can be connected in parallel without causing safety risk when the voltages are unequal, and random parallel connection between the two battery packs is realized.
the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (11)
1. A battery pack control method, the method comprising:
Detecting the current flow direction in real time;
when the current flowing direction is from the cathode of the battery to the cathode of the port, the current charging current is detected;
Judging whether the current magnitude of the current charging is larger than a first current threshold value;
if so, disconnecting the direct current path between the battery cathode and the port cathode, and communicating the current-limiting path between the battery cathode and the port cathode so as to perform current-limiting operation.
2. the battery pack control method of claim 1, wherein the step of determining whether the current magnitude of the present charge is greater than the first current threshold further comprises:
And when the current charged at present is judged to be smaller than the first current threshold, disconnecting the current-limiting passage between the cathode of the battery and the cathode of the port, and communicating the direct current passage between the cathode of the battery and the cathode of the port so as to normally operate.
3. the battery pack control method according to claim 1, wherein after the step of detecting the current flow direction in real time, the method further comprises:
when the current flowing from the port cathode to the battery cathode is detected, detecting the current magnitude of current discharging;
Judging whether the current magnitude of the current discharge is larger than a second current threshold value;
If so, disconnecting a direct current path and a current limiting path between the cathode of the battery and the cathode of the port so as to prohibit operation;
And if not, communicating a direct current path between the battery cathode and the port cathode.
4. the battery pack control method according to claim 1, wherein the step of detecting the current magnitude of the present charge when the current flow direction is detected from the battery negative electrode to the port negative electrode comprises:
When the current flowing direction is from the cathode of the battery to the cathode of the port, judging whether a communication signal sent by the communication port is received;
If so, connecting a direct current path between the cathode of the battery and the cathode of the port, and disconnecting a current-limiting path between the cathode of the battery and the cathode of the port so that the charger can normally charge the battery pack;
if not, detecting the current magnitude of the current charging.
5. The battery pack control method of claim 1, wherein the step of disconnecting the dc path between the negative electrode of the battery and the negative electrode of the port and connecting the current limiting path between the negative electrode of the battery and the negative electrode of the port is followed by the step of:
when the current flowing direction is detected to be from the battery cathode to the port cathode and the current magnitude of the current charged is detected to be smaller than the third current threshold, the direct current path communicated between the battery cathode and the port cathode is switched, and the current limiting path between the battery cathode and the port cathode is disconnected, so that the normal operation is realized.
6. a battery pack control apparatus, the apparatus comprising:
the first detection module is used for detecting the current flow direction in real time;
the second detection module is used for detecting the current magnitude of the current charging when the current flowing direction is from the cathode of the battery to the cathode of the port;
The first judging module is used for judging whether the current magnitude of the current charging is larger than a first current threshold value;
And the first control module is used for disconnecting the direct current path between the cathode of the battery and the cathode of the port and communicating the current-limiting path between the cathode of the battery and the cathode of the port to enable the current-limiting operation when the first judging module judges that the current magnitude of the current charged is greater than the first current threshold value.
7. the battery pack control apparatus as set forth in claim 6, further comprising:
And the second control module is used for disconnecting the current-limiting passage between the cathode of the battery and the cathode of the port and communicating the direct current passage between the cathode of the battery and the cathode of the port to enable the battery to normally operate when the first judging module judges that the current magnitude of the current charged is smaller than the first current threshold value.
8. The battery pack control apparatus as set forth in claim 6, further comprising:
The third detection module is used for detecting the current magnitude of current discharging when the current flowing direction is from the port cathode to the battery cathode;
the second judgment module is used for judging whether the current magnitude of the current discharge is greater than a second current threshold value;
The third control module is used for disconnecting a direct current path and a current limiting path between the negative electrode of the battery and the negative electrode of the port to inhibit operation when the second judging module judges that the current magnitude of the current for discharging is larger than the second current threshold;
And the fourth control module is used for communicating a direct current path between the cathode of the battery and the cathode of the port when the second judging module judges that the current discharged current is smaller than the second current threshold.
9. The battery pack control apparatus according to claim 6, wherein the second detection module includes:
the first judging unit is used for judging whether a communication signal sent by a communication port is received or not when the current flowing direction is from the cathode of the battery to the cathode of the port;
the first control unit is used for connecting a direct current path between the negative electrode of the battery and the negative electrode of the port and disconnecting a current-limiting path between the negative electrode of the battery and the negative electrode of the port when the first judging unit judges that a communication signal sent by the communication port is received, so that the battery pack is normally charged by the charger;
And the second control unit is used for detecting the current magnitude of the current charging when the first judging unit judges that the communication signal sent by the communication port is not received.
10. The battery pack control apparatus as set forth in claim 6, further comprising:
and the fifth control module is used for switching a direct current path between the battery cathode and the port cathode and disconnecting a current limiting path between the battery cathode and the port cathode to enable the battery to normally operate when the current flowing direction is detected to be from the battery cathode to the port cathode and the current magnitude of the current charged is detected to be smaller than a third current threshold value.
11. an electrical appliance, characterized in that the electrical appliance comprises a battery pack control device according to any one of claims 6-10.
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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 |
| CN113472035A (en) * | 2021-06-22 | 2021-10-01 | 深圳拓邦股份有限公司 | Lithium battery work control method and system and electric equipment |
| CN113839433A (en) * | 2020-06-24 | 2021-12-24 | 北京小米移动软件有限公司 | Charge and discharge protection circuit and protection method, battery protection board and electronic equipment |
| CN114243877A (en) * | 2022-02-28 | 2022-03-25 | 深圳市德兰明海科技有限公司 | Battery pack parallel lapping method and system and readable storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004282894A (en) * | 2003-03-14 | 2004-10-07 | Fujitsu Access Ltd | Charging/discharging device |
| CN107994640A (en) * | 2017-12-18 | 2018-05-04 | 江苏双登富朗特新能源有限公司 | The battery management system and its management method of passive trigger-type charging current limiter |
| CN108282007A (en) * | 2018-02-12 | 2018-07-13 | 中航锂电技术研究院有限公司 | Communicate charging battery module current limliting strategy |
| CN108649632A (en) * | 2018-05-10 | 2018-10-12 | 欣旺达电子股份有限公司 | Battery system multimode group parallel circuit and implementation method |
| CN109245189A (en) * | 2017-07-10 | 2019-01-18 | 中兴通讯股份有限公司 | A kind of battery management system and a kind of circuit for battery set charge/discharge |
-
2019
- 2019-09-27 CN CN201910923028.5A patent/CN110571888A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004282894A (en) * | 2003-03-14 | 2004-10-07 | Fujitsu Access Ltd | Charging/discharging device |
| CN109245189A (en) * | 2017-07-10 | 2019-01-18 | 中兴通讯股份有限公司 | A kind of battery management system and a kind of circuit for battery set charge/discharge |
| CN107994640A (en) * | 2017-12-18 | 2018-05-04 | 江苏双登富朗特新能源有限公司 | The battery management system and its management method of passive trigger-type charging current limiter |
| CN108282007A (en) * | 2018-02-12 | 2018-07-13 | 中航锂电技术研究院有限公司 | Communicate charging battery module current limliting strategy |
| CN108649632A (en) * | 2018-05-10 | 2018-10-12 | 欣旺达电子股份有限公司 | Battery system multimode group parallel circuit and implementation method |
Cited By (5)
| 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 |
| CN113839433A (en) * | 2020-06-24 | 2021-12-24 | 北京小米移动软件有限公司 | Charge and discharge protection circuit and protection method, battery protection board and electronic equipment |
| CN113472035A (en) * | 2021-06-22 | 2021-10-01 | 深圳拓邦股份有限公司 | Lithium battery work control method and system and electric equipment |
| CN114243877A (en) * | 2022-02-28 | 2022-03-25 | 深圳市德兰明海科技有限公司 | Battery pack parallel lapping method and system and readable storage medium |
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