Battery formation control circuit

Abstract

The utility model discloses a battery formation control circuit, which comprises at least one sub-module, the sub-module is electrically connected with an external power supply, each sub-module is electrically connected with a battery corresponding to the sub-module and controls the on-off of the battery and the power supply, and different sub-modules are connected in series; each sub-module comprises a switching device, a bypass device and an anti-reverse-connection device, the bypass device is connected with the switching device and the anti-reverse-connection device in parallel, the anti-reverse-connection device is connected with the switching device in series, and the anti-reverse-connection device and the switching device can respectively control the on-off of the battery and the power supply. The battery formation control circuit provided by the embodiment of the utility model can realize soft switching and prevent reverse connection of the battery in the process of controlling battery formation.

Description

Technical Field

[0001] The utility model relates to the technical field of battery formation, in particular to a battery formation control circuit. Background Art

[0002] During the battery production process, the battery needs to go through the process of charging and discharging. When a batch of batteries is formed in parallel, it is difficult to control the size of the current passing through different batteries, resulting in poor consistency in the performance of batteries in a batch. In addition, the energy loss generated when charging and discharging the batteries in parallel is large, and the charging and discharging efficiency is low. Utility Model Content

[0003] The embodiment of the utility model provides a battery formation control circuit, which can realize soft switch switching and prevent battery reverse connection during the process of controlling battery formation.

[0004] In a first aspect, an embodiment of the utility model provides a battery formation control circuit, which includes: at least one submodule, the submodule is electrically connected to an external power supply, each submodule is electrically connected to a corresponding battery and controls the on-off connection between the battery and the power supply, and different submodules are connected in series; the submodule includes a switching device, a bypass device and an anti-reverse connection device, the bypass device is connected in parallel with the switching device and the anti-reverse connection device, the anti-reverse connection device is connected in series with the switching device, and the anti-reverse connection device and the switching device can respectively control the on-off connection between the battery and the power supply.

[0005] Optionally, the battery formation control circuit further includes a controller, which is electrically connected to the switch device, the bypass device, and the anti-reverse connection device respectively and can control the on and off of the switch device, the bypass device, and the anti-reverse connection device respectively.

[0006] Optionally, the controller is used to control the charging current of the battery to gradually increase or decrease, and the battery formation control circuit has a soft-on state and a soft-off state; when the battery formation control circuit is in the soft-on state, the bypass current passing through the bypass device gradually decreases, and the charging current passing through the switching device gradually increases; when the battery formation control circuit is in the soft-off state, the charging current passing through the switching device gradually decreases, and the bypass current passing through the bypass device gradually increases.

[0007] Optionally, the submodule also includes an input end and an output end, one end of the switching device is electrically connected to the input end, and the other end is electrically connected to the anti-reverse connection device, and the control end of the switching device is electrically connected to the controller, and the controller can control the conduction and shutdown of the switching device through the control end of the switching device.

[0008] Optionally, one end of the bypass device is electrically connected to the input end, and the other end is electrically connected to the output end. The control end of the bypass device is electrically connected to the controller, and the controller can control the on and off of the bypass device through the control end of the bypass device.

[0009] Optionally, one end of the anti-reverse polarity device is electrically connected to the switching device, the other end is electrically connected to one end of the battery, the other end of the battery is electrically connected to the output end, and the control end of the anti-reverse polarity device is electrically connected to the controller, and the controller can control the conduction and shutdown of the anti-reverse polarity device through the control end of the anti-reverse polarity device.

[0010] Optionally, there are multiple submodules, and the multiple submodules are connected in series in sequence, wherein the output end of the adjacent previous submodule is connected to the input end of the next submodule, the input end of the first submodule among the multiple submodules is connected to the first pole of the power supply, and the output end of the last submodule among the multiple submodules is connected to the second pole of the power supply.

[0011] Optionally, the submodule further includes a charging interface, one end of the charging interface is electrically connected to the anti-reverse connection device, and the other end is electrically connected to the output end, and the battery can be charged or discharged through the charging interface.

[0012] Optionally, the positive and negative electrodes of the battery are positively connected to the positive and negative electrodes of the charging interface, and the anti-reverse polarity device is turned on; the positive and negative electrodes of the battery are reversely connected to the positive and negative electrodes of the charging interface, and the anti-reverse polarity device is turned off; when the anti-reverse polarity device and the switching device are in the on state, the battery can be connected to the power supply; when the anti-reverse polarity device and / or the switching device are in the off state, the battery is disconnected from the power supply.

[0013] Optionally, at least one of the switch device, the reverse connection protection device, and the bypass device includes an N-channel enhancement type field effect transistor.

[0014] The battery formation control circuit of the embodiment of the utility model can form the battery through the sub-module. During the battery formation process, the soft switching of the battery is realized through the cooperation of the switch device and the bypass device to prevent voltage overshoot or current overshoot. At the same time, when the battery is connected reversely, the battery can be disconnected from the power supply through the anti-reverse connection device to ensure safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1It is a structural block diagram of the submodule of the first embodiment of the battery formation control circuit of the utility model;

[0017] Figure 2 It is a structural block diagram of a submodule of a second embodiment of a battery formation control circuit of the utility model;

[0018] Figure 3 It is a structural schematic diagram of a submodule of a third embodiment of a battery formation control circuit of the utility model;

[0019] Figure 4 It is a structural schematic diagram of multiple submodules of the third embodiment of the battery formation control circuit of the utility model;

[0020] Figure 5 It is a structural schematic diagram of multiple submodules and batteries of the third embodiment of the battery formation control circuit of the utility model;

[0021] Figure 6 The present invention is a structural block diagram of an embodiment of the battery formation control device of the present invention.

[0022] Description of Figure Numbers:

[0023] 100-battery formation control circuit; 110-submodule; 111-switch device; 112-bypass device; 113-anti-reverse connection device; 120-controller; 130-charging interface; 200-battery; 300-processor; A1-input end; A2-output end; B1-positive pole of charging interface; B2-negative pole of charging interface.

[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The embodiment of the utility model provides a battery formation control circuit, which can realize soft switch switching and prevent battery reverse connection during the process of controlling battery formation.

[0027] like Figure 1As shown, in the first embodiment of the utility model, the battery formation control circuit 100 includes: at least one submodule 110, the submodule 110 is electrically connected to an external power supply, each submodule 110 is electrically connected to the corresponding battery 200 and controls the on and off of the battery 200 and the power supply, and different submodules 110 are connected in series.

[0028] The submodule 110 includes a switch device 111, a bypass device 112 and an anti-reverse connection device 113. The bypass device 112 is connected in parallel with the switch device 111 and the anti-reverse connection device 113. The anti-reverse connection device 113 is connected in series with the switch device 111. The anti-reverse connection device 113 and the switch device 111 can respectively control the on and off of the battery 200 and the power supply.

[0029] In the embodiment of the utility model, the switch device 111 is connected in series with the anti-reverse connection device 113. When the battery 200 is charged or discharged, the switch device 111 and the anti-reverse connection device 113 are turned on, and the bypass device 112 is disconnected. When the battery 200 is fully charged and in a static state or when the formation process of the battery 200 is completed, the switch device 111 is disconnected and the bypass device 112 is turned on. At this time, the power supply current flows through the bypass device 112 of the submodule 110 and flows to the next module. When the positive and negative poles of the battery 200 are reversed, the anti-reverse connection device 113 can be disconnected to ensure the safety of the circuit.

[0030] The battery formation control circuit 100 of the embodiment of the utility model can form the battery 200 through the submodule 110. During the formation process of the battery 200, the soft switching of the battery 200 is realized through the cooperation of the switch device 111 and the bypass device 112 to prevent voltage overshoot or current overshoot. At the same time, when the battery 200 is connected reversely, the battery 200 can be disconnected from the power supply through the anti-reverse connection device 113 to ensure safety.

[0031] like Figure 2 As shown, optionally, the battery formation control circuit 100 also includes a controller 120, which is electrically connected to the switch device 111, the bypass device 112, and the anti-reverse connection device 113 respectively and can control the conduction and shutdown of the switch device 111, the bypass device 112, and the anti-reverse connection device 113 respectively.

[0032] When the battery formation control circuit 100 of the embodiment of the utility model includes multiple sub-modules 110, the controller 120 is electrically connected to the switch device 111, the bypass device 112 and the anti-reverse connection device 113 in each sub-module 110, so that the controller 120 can control the conduction and disconnection of the switch device 111, the bypass device 112 and the anti-reverse connection device 113 in each sub-module 110 to control the connection and disconnection of the battery 200 and the power supply in the corresponding sub-module 110.

[0033] Furthermore, the controller 120 is used to control the charging current of the battery 200 to gradually increase or gradually decrease, and the battery formation control circuit 100 has a soft-on state and a soft-off state; when the battery formation control circuit 100 is in the soft-on state, the bypass current passing through the bypass device 112 gradually decreases, and the charging current passing through the switch device 111 gradually increases; when the battery formation control circuit 100 is in the soft-off state, the charging current passing through the switch device 111 gradually decreases, and the bypass current passing through the bypass device 112 gradually increases.

[0034] Specifically, in an embodiment of the utility model, when the battery 200 is connected to the sub-module 110, the controller 120 controls the corresponding sub-module 110 to charge and discharge the battery 200. At this time, the battery formation control circuit 100 is in a soft-on state, and the controller 120 applies a gradually increasing driving voltage to the switching device 111, so that the internal resistance of the switching device 111 gradually decreases, and the charging current passing through the switching device 111 gradually increases. At the same time, the controller 120 gradually reduces the driving voltage of the bypass device 112, and the bypass current passing through the bypass device 112 gradually decreases until the bypass device 112 is completely disconnected and the switch device 111 is fully turned on.

[0035] When the battery 200 is in a state of transition from a charge and discharge state to a static state or needs to end the formation process, the battery formation control circuit 100 is in a soft-off state, and the controller 120 gradually increases the driving voltage applied to the switch device 111, so that the internal resistance of the switch device 111 gradually increases, and the charging current passing through the switch device 111 gradually decreases. At the same time, the controller 120 applies a gradually increasing driving voltage to the bypass device 112, and the bypass current passing through the bypass device 112 gradually increases until the bypass device 112 is fully turned on and the switch device 111 is completely disconnected, and the battery 200 ends charging and discharging and transitions to a static state or ends the formation process.

[0036] Optionally, the submodule 110 also includes an input terminal A1 and an output terminal A2, one end of the switch device 111 is electrically connected to the input terminal A1, and the other end is electrically connected to the anti-reverse connection device 113, and the control end of the switch device 111 is electrically connected to the controller 120, and the controller 120 can control the conduction and shutdown of the switch device 111 through the control end of the switch device 111.

[0037] The input terminal A1 and the output terminal A2 of the submodule 110 are respectively connected to the power supply. When the battery 200 in the submodule 110 is in a charging state, the power supply inputs current through the input terminal A1 of the submodule 110. When the battery 200 in the submodule 110 is in a discharging state, the current released by the battery 200 can flow to the power supply.

[0038] Furthermore, one end of the bypass device 112 is electrically connected to the input end A1, and the other end is electrically connected to the output end A2. The control end of the bypass device 112 is electrically connected to the controller 120. The controller 120 can control the on and off of the bypass device 112 through the control end of the bypass device 112.

[0039] The controller 120 can output a driving voltage to the control terminal of the bypass device 112 , and control the on and off of the bypass device 112 by controlling the magnitude of the driving voltage.

[0040] Optionally, one end of the anti-reverse polarity device 113 is electrically connected to the switching device 111, and the other end is electrically connected to one end of the battery 200, the other end of the battery 200 is electrically connected to the output terminal A2, and the control end of the anti-reverse polarity device 113 is electrically connected to the controller 120, and the controller 120 can control the conduction and shutdown of the anti-reverse polarity device 113 through the control end of the anti-reverse polarity device 113.

[0041] The controller 120 can output a driving voltage to the control end of the anti-reverse connection device 113, and control the on and off of the anti-reverse connection device 113 by controlling the magnitude of the driving voltage. When the positive and negative electrodes of the battery 200 are reversely connected to the submodule 110, the controller 120 can obtain a reverse connection signal, and control the anti-reverse connection device 113 to turn off according to the reverse connection signal, so that the battery 200 is disconnected from the power supply.

[0042] like Figure 4 , Figure 5 As shown, optionally, there are multiple submodules 110, and the multiple submodules 110 are connected in series in sequence, wherein the output terminal A2 of the adjacent previous submodule 110 is connected to the input terminal A1 of the next submodule 110, the input terminal A1 of the first submodule 110 in the multiple submodules 110 is connected to the first pole of the power supply, and the output terminal A2 of the last submodule 110 in the multiple submodules 110 is connected to the second pole of the power supply. The first pole of the power supply is the positive pole, and the second pole of the power supply is the negative pole.

[0043] By connecting multiple submodules 110 in series, each submodule 110 can charge and discharge the battery 200. Compared with the parallel formation method, the formation method of connecting multiple submodules 110 in series can reduce the energy loss of the battery formation control circuit 100 during the formation process, and at the same time can ensure the consistency of the formation of multiple batteries 200 and improve the formation efficiency.

[0044] Optionally, the submodule 110 further includes a charging interface 130 , one end of the charging interface 130 is electrically connected to the anti-reverse connection device 113 , and the other end is electrically connected to the output terminal A2 , and the battery 200 can be charged or discharged through the charging interface 130 .

[0045] Furthermore, when the positive and negative electrodes of the battery 200 are positively connected to the positive and negative electrodes of the charging interface 130, the anti-reverse connection device 113 is turned on; when the positive and negative electrodes of the battery 200 are reversely connected to the positive and negative electrodes of the charging interface 130, the anti-reverse connection device 113 is turned off; when the anti-reverse connection device 113 and the switching device 111 are in the on state, the battery 200 can be connected to the power supply; when the anti-reverse connection device 113 and / or the switching device 111 are in the off state, the battery 200 is disconnected from the power supply.

[0046] The charging interface 130 includes a charging interface positive pole B1 and a charging interface negative pole B2. By electrically connecting the positive pole and negative pole of the battery 200 to the charging interface positive pole B1 and the charging interface negative pole B2 respectively, the battery formation control circuit 100 can form the battery 200. When the positive and negative poles of the battery 200 are reversely connected to the charging interface positive pole B1 and the charging interface negative pole B2, the controller 120 can obtain a reverse connection signal and control the anti-reverse connection device 113 to disconnect.

[0047] Optionally, at least one of the switch device 111 , the reverse connection protection device 113 , and the bypass device 112 includes an N-channel enhancement type field effect transistor.

[0048] like Figure 3 As shown, in the embodiment of the present utility model, the switch device 111, the anti-reverse connection device 113, and the bypass device 112 are all N-channel enhancement field effect transistors. By electrically connecting the controller 120 to the gates of different MOS tubes respectively, the controller 120 can control the conduction and shutdown of different MOS tubes, realize the soft switching function and anti-reverse connection function of the battery formation control circuit 100 in the embodiment of the present utility model, prevent voltage overshoot, current overshoot and reverse connection of the battery 200, and ensure the safety of the battery formation control circuit 100 in the embodiment of the present utility model.

[0049] At the same time, the MOS tube can ensure that the circuit is completely shut down, so that during the formation process of the battery 200, when the switch device 111 and / or the anti-reverse connection device 113 are disconnected, the battery 200 can be completely disconnected from the power supply, ensuring that the battery formation control circuit 100 is in a bypass state and there is no leakage in the switch device 111 and the anti-reverse connection device 113, thereby ensuring the safety of the circuit.

[0050] Optionally, the switch device 111, the reverse connection protection device 113 and the bypass device 112 in the embodiment of the utility model can also be an N-channel depletion type field effect transistor, a P-channel field effect transistor, etc. respectively.

[0051] like Figure 6As shown, the utility model also proposes a battery 200 formation control device, which includes a battery formation control circuit 100 of any of the aforementioned embodiments and a processor 300, wherein the processor 300 is electrically connected to the battery formation control circuit 100, and the processor 300 can control the on and off of the battery 200 and the power supply through the battery formation control circuit 100.

[0052] The battery formation control circuit 100 includes: at least one submodule 110, the submodule 110 is electrically connected to an external power supply, each submodule 110 is electrically connected to a corresponding battery 200 and controls the connection and disconnection between the battery 200 and the power supply, and different submodules 110 are connected in series.

[0053] The submodule 110 includes a switch device 111, a bypass device 112 and an anti-reverse connection device 113. The bypass device 112 is connected in parallel with the switch device 111 and the anti-reverse connection device 113. The anti-reverse connection device 113 is connected in series with the switch device 111. The anti-reverse connection device 113 and the switch device 111 can respectively control the on and off of the battery 200 and the power supply.

[0054] According to the battery 200 formation control device of the embodiment of the utility model, it includes a battery formation control circuit 100. The battery formation control circuit 100 can form the battery 200 through the submodule 110. During the formation process of the battery 200, the soft switch switching of the battery 200 is realized through the cooperation of the switch device 111 and the bypass device 112 to prevent voltage overshoot or current overshoot. At the same time, when the battery 200 is connected reversely, the battery 200 can be disconnected from the power supply through the anti-reverse connection device 113 to ensure safety, so that the battery 200 formation control device can avoid the problem of voltage overshoot and current overshoot when the battery 200 is connected reversely or switched during the formation process of the battery 200.

[0055] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0056] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0057] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A battery formation control circuit, characterized in that: The battery formation control circuit comprises: At least one submodule, the submodule is electrically connected to an external power source, each of the submodules is electrically connected to a corresponding battery and controls the on / off connection between the battery and the power source, and different submodules are connected in series; The submodule includes a switch device, a bypass device and an anti-reverse connection device. The bypass device is connected in parallel with the switch device and the anti-reverse connection device, and the anti-reverse connection device is connected in series with the switch device. The anti-reverse connection device and the switch device can respectively control the on and off of the battery and the power supply.

2. The battery formation control circuit according to claim 1, characterized in that: The battery formation control circuit also includes a controller, which is electrically connected to the switch device, the bypass device, and the anti-reverse connection device respectively and can control the on and off of the switch device, the bypass device, and the anti-reverse connection device respectively.

3. The battery formation control circuit according to claim 2, characterized in that: The controller is used to control the charging current of the battery to gradually increase or decrease, and the battery formation control circuit has a soft-on state and a soft-off state; When the battery formation control circuit is in the soft-on state, the bypass current passing through the bypass device gradually decreases, and the charging current passing through the switch device gradually increases; When the battery formation control circuit is in the soft-off state, the charging current passing through the switch device gradually decreases, and the bypass current passing through the bypass device gradually increases.

4. The battery formation control circuit according to claim 2, characterized in that: The submodule also includes an input end and an output end, one end of the switch device is electrically connected to the input end, and the other end is electrically connected to the anti-reverse connection device, the control end of the switch device is electrically connected to the controller, and the controller can control the conduction and shutdown of the switch device through the control end of the switch device.

5. The battery formation control circuit according to claim 4, characterized in that: One end of the bypass device is electrically connected to the input end, and the other end is electrically connected to the output end. The control end of the bypass device is electrically connected to the controller, and the controller can control the on and off of the bypass device through the control end of the bypass device.

6. The battery formation control circuit according to claim 4, characterized in that: One end of the anti-reverse polarity device is electrically connected to the switching device, and the other end is electrically connected to one end of the battery. The other end of the battery is electrically connected to the output end. The control end of the anti-reverse polarity device is electrically connected to the controller. The controller can control the conduction and shutdown of the anti-reverse polarity device through the control end of the anti-reverse polarity device.

7. The battery formation control circuit according to claim 4, characterized in that: There are multiple submodules, and the multiple submodules are connected in series in sequence, wherein the output end of the adjacent previous submodule is connected to the input end of the next submodule, the input end of the first submodule among the multiple submodules is connected to the first pole of the power supply, and the output end of the last submodule among the multiple submodules is connected to the second pole of the power supply.

8. The battery formation control circuit according to claim 4, characterized in that: The submodule further comprises a charging interface, one end of which is electrically connected to the anti-reverse connection device, and the other end of which is electrically connected to the output end, and the battery can be charged or discharged through the charging interface.

9. The battery formation control circuit according to claim 8, characterized in that: The positive and negative electrodes of the battery are positively connected to the positive and negative electrodes of the charging interface, and the anti-reverse connection device is turned on; the positive and negative electrodes of the battery are reversely connected to the positive and negative electrodes of the charging interface, and the anti-reverse connection device is turned off; When the anti-reverse connection device and the switch device are in the on state, the battery can be connected to the power supply; when the anti-reverse connection device and / or the switch device are in the off state, the battery is disconnected from the power supply.

10. The battery formation control circuit according to any one of claims 1 to 9, characterized in that: At least one of the switch device, the anti-reverse connection device, and the bypass device includes an N-channel enhancement type field effect transistor.

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