Battery formation protection circuit and equipment

Abstract

The utility model discloses a battery formation protection circuit and equipment, the battery formation protection circuit comprises at least one sub-module, the sub-module can be respectively electrically connected with a first power supply and a battery, the sub-module comprises a protection assembly and a switch assembly, the protection assembly and the switch assembly are connected in parallel, and the sub-module has a charge-discharge state and a bypass state; the switch assembly can control connection and disconnection between the battery and the power supply, the protection assembly comprises a triode and a first transistor, a collector electrode of the triode is electrically connected with the first transistor, a base electrode and an emitter electrode of the triode are electrically connected with a second power supply, and the triode can drive the first transistor to be connected in a connected state. And the sub-module is in a bypass state. The battery formation protection circuit provided by the embodiment of the utility model can quickly disconnect the connection between the battery and the power supply when the power supply fails.

Description

Technical Field

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

[0002] During the battery production process, the battery needs to go through the charging and discharging process. During the formation process, multiple batteries are usually formed at the same time to improve production efficiency. During the battery formation process, if the voltage of the power supply is unstable, it is easy to cause quality problems in the battery and increase production costs. When the power supply is monitored manually, it is easy to have problems with untimely response when the power supply fails, which is inefficient. Utility Model Content

[0003] The embodiment of the utility model provides a battery formation protection circuit and device, which can quickly disconnect the connection between the battery and the power supply when a power failure occurs.

[0004] In a first aspect, an embodiment of the utility model provides a battery formation protection circuit, which includes: at least one submodule, the submodule can be electrically connected to a first power supply and a battery respectively, the submodule includes a protection component and a switch component, the protection component and the switch component are connected in parallel, and the submodule has a charge and discharge state and a bypass state; the switch component can control the conduction and disconnection between the battery and the first power supply, the protection component includes a triode and a first transistor, the collector of the triode is electrically connected to the first transistor, the base and emitter of the triode are electrically connected to the second power supply, and the triode can drive the first transistor to conduct when it is in the on state, so that the submodule is in the bypass state.

[0005] The submodule of the battery formation protection circuit of the embodiment of the utility model can realize automatic protection of the battery in the formation process through the protection component. When the voltage output by the first power supply is unstable, the triode can be turned on and drive the first transistor to be turned on. When the first transistor is turned on, the switch component is turned off, so that the submodule can automatically switch from the charge and discharge state to the bypass state, disconnect the battery from the first power supply, and protect the circuit and the battery.

[0006] Optionally, the submodule further includes an input end and an output end, one end of the first transistor is electrically connected to the input end, the other end is electrically connected to the output end, and the control end of the first transistor is electrically connected to the triode.

[0007] Optionally, the transistor is a PNP transistor.

[0008] Optionally, the switch component includes a second transistor and a third transistor, one end of the second transistor is electrically connected to the input end, the other end is electrically connected to the third transistor, and the control end of the second transistor is electrically connected to an external controller.

[0009] Optionally, one end of the third transistor is electrically connected to the second transistor, and the other end is electrically connected to the battery, and the control end of the third transistor is electrically connected to the controller; when the positive and negative poles of the battery are positively connected to the sub-module, the controller controls the third transistor to turn on; when the positive and negative poles of the battery are reversely connected to the sub-module, the controller controls the third transistor to turn off.

[0010] Optionally, the submodule further includes a charging interface, one end of the charging interface is electrically connected to the third transistor, and the other end of the charging interface is electrically connected to the output end, and the battery can be charged or discharged through the charging interface.

[0011] Optionally, when the positive and negative electrodes of the battery are positively connected to the positive and negative electrodes of the charging interface, the controller controls the third transistor to turn on; when the positive and negative electrodes of the battery are reversely connected to the positive and negative electrodes of the charging interface, the controller controls the third transistor to turn off; when the submodule is in the charging and discharging state, the second transistor and the third transistor are turned on, the protection component is disconnected from the first power supply, and the battery is connected to the first power supply; when the submodule is in the bypass state, the second transistor and / or the third transistor are turned off, the protection component is connected to the first power supply, and the battery is disconnected from the first power supply.

[0012] Optionally, the battery formation protection circuit is electrically connected to an external controller, the controller includes a second power supply, the controller is electrically connected to the first power supply, the controller can obtain an abnormal signal generated by the first power supply, the controller can apply a first voltage and a second voltage to the base and emitter of the transistor respectively, the controller can control the first voltage to decrease according to the abnormal signal, so that the transistor is turned on, and the abnormal signal is that the voltage value output by the first power supply exceeds the standard fluctuation range.

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

[0014] In the second aspect, an embodiment of the utility model provides a battery formation protection device, which includes a battery formation protection circuit and a controller of any of the aforementioned embodiments of the first aspect of the utility model. The controller is electrically connected to the protection component and the switch component, and the controller can control the conduction and disconnection of the protection component and the switch component respectively.

[0015] The battery formation protection device of the embodiment of the utility model includes a battery formation protection circuit. The submodule of the battery formation protection circuit can realize automatic protection of the battery in the formation process through the protection component. When the voltage output by the first power supply is unstable, the triode can be turned on and drive the first transistor to be turned on. When the first transistor is turned on, the switch component is turned off, so that the submodule can automatically switch from the charge and discharge state to the bypass state, disconnect the battery from the first power supply, and protect the circuit and the battery, so that the battery formation protection device can avoid the problem of circuit or battery damage due to power supply abnormality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 It is a structural block diagram of the first embodiment of the battery formation protection circuit of the utility model;

[0018] Figure 2 It is a structural block diagram of the battery formation of the first embodiment of the battery formation protection circuit of the utility model;

[0019] Figure 3 It is a structural block diagram of a plurality of submodules in series in one embodiment of the battery formation protection circuit of the utility model;

[0020] Figure 4 It is a structural schematic diagram of a second embodiment of the battery formation protection circuit of the utility model;

[0021] Figure 5 It is a structural schematic diagram of the battery formation of the second embodiment of the battery formation protection circuit of the utility model;

[0022] Figure 6 This is a structural block diagram of an embodiment of the battery formation protection device of the utility model;

[0023] Figure 7 The utility model is a structural schematic diagram of a battery formation protection device according to an embodiment of the utility model during battery formation.

[0024] Description of Figure Numbers:

[0025] 100-battery formation protection circuit; 110-submodule; 111-protection component; 1111-first transistor; 112-switch component; 1121-second transistor; 1122-third transistor; 120-charging interface; 200-battery; 300-controller; A1-input end; A2-output end; B1-first end; B2-second end; C1-positive pole of charging interface; C2-negative pole of charging interface; Q1-transistor.

[0026] 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

[0027] 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.

[0028] The embodiment of the utility model provides a battery formation protection circuit and device, which can quickly disconnect the connection between the battery and the power supply when a power failure occurs.

[0029] like Figures 1 to 3 As shown, in the first embodiment of the utility model, the battery formation protection circuit 100 includes: at least one submodule 110, the submodule 110 can be electrically connected to the first power source and the battery 200 respectively, the submodule 110 includes a protection component 111 and a switch component 112, the protection component 111 and the switch component 112 are connected in parallel, and the submodule 110 has a charge and discharge state and a bypass state.

[0030] The switch component 112 can control the conduction and disconnection between the battery 200 and the first power supply. The protection component 111 includes a transistor Q1 and a first transistor 1111. The collector of the transistor Q1 is electrically connected to the first transistor 1111, and the base and emitter of the transistor Q1 are electrically connected to the second power supply. When the transistor Q1 is in the on state, it can drive the first transistor 1111 to turn on, so that the submodule 110 is in a bypass state.

[0031] When the submodule 110 is in the charge and discharge state, the battery 200 can be charged or the battery 200 can reversely discharge the first power supply. When the submodule 110 is in the bypass state, the current input by the power supply flows through the first transistor 1111 and flows to the next submodule 110, and the battery 200 is disconnected from the first power supply.

[0032] In the embodiment of the battery formation protection circuit 100 of the utility model, a plurality of submodules 110 are connected in series, and each submodule 110 can be electrically connected to the battery 200, so that the battery 200 can be formed. When the battery 200 needs to be charged or discharged, the triode Q1 and the first transistor 1111 of the protection component 111 are in the off state, and the switch component 112 is in the on state, so that the battery 200 is electrically connected to the first power supply, and the battery 200 can be charged and discharged. When the submodule 110 is in the charge and discharge state, if the first power supply is abnormal, such as the voltage output by the first power supply is unstable, the triode Q1 of the protection component 111 can be turned on, and the driving voltage is applied to the first transistor 1111, so that the first transistor 1111 is turned on, and the switch component 112 is turned off, so that the submodule 110 is switched from the charge and discharge state to the bypass state to protect the circuit and the battery 200.

[0033] The submodule 110 of the battery formation protection circuit 100 of the embodiment of the utility model can realize automatic protection of the battery 200 in the formation process through the protection component 111. When the voltage output by the first power supply is unstable, the transistor Q1 can be turned on and drive the first transistor 1111 to be turned on. When the first transistor 1111 is turned on, the switch component 112 is turned off, so that the submodule 110 can automatically switch from the charge and discharge state to the bypass state, disconnect the battery 200 from the first power supply, and protect the circuit and the battery 200.

[0034] Optionally, the submodule 110 further includes an input terminal A1 and an output terminal A2, one terminal of the first transistor 1111 is electrically connected to the input terminal A1, the other terminal is electrically connected to the output terminal A2, and the control terminal of the first transistor 1111 is electrically connected to the transistor Q1.

[0035] When an abnormality occurs in the first power supply, the transistor Q1 is turned on and a driving voltage is applied to the control end of the first transistor 1111, so that the first transistor 1111 is turned on, and at the same time the switch component 112 is turned off, so that the current of the first power supply flows through the first transistor 1111 to protect the circuit and the battery 200.

[0036] Optionally, the transistor Q1 is a PNP transistor. In the embodiment of the utility model, when the first power supply operates normally, the second power supply applies a 12V voltage to the base and emitter of the transistor Q1 respectively, and the collector of the transistor Q1 is connected to the control end of the first transistor 1111, and the transistor Q1 is in a disconnected state.

[0037] When the first power supply is abnormal, the 12V voltage applied by the second power supply to the base of the transistor Q1 is reduced, so that a voltage difference is generated between the emitter and the base. The transistor Q1 is turned on and a driving voltage is applied to the control end of the first transistor 1111, so that the first transistor 1111 is turned on.

[0038] Optionally, the switch component 112 includes a second transistor 1121 and a third transistor 1122 , one end of the second transistor 1121 is electrically connected to the input end A1 , and the other end is electrically connected to the third transistor 1122 , and a control end of the second transistor 1121 is electrically connected to an external controller 300 .

[0039] The controller 300 can apply a driving voltage to the control terminals of the second transistor 1121 and the third transistor 1122 respectively, and control the conduction of the second transistor 1121 and the third transistor 1122 by controlling the magnitude of the driving voltage.

[0040] Furthermore, one end of the third transistor 1122 is electrically connected to the second transistor 1121, and the other end is electrically connected to the battery 200, and the control end of the third transistor 1122 is electrically connected to the controller 300; when the positive and negative poles of the battery 200 are positively connected to the sub-module 110, the controller 300 controls the third transistor 1122 to be turned on; when the positive and negative poles of the battery 200 are reversely connected to the sub-module 110, the controller 300 controls the third transistor 1122 to be turned off.

[0041] Specifically, when the battery 200 and the submodule 110 are reversely connected, a reverse connection signal is generated. The controller 300 can obtain the reverse connection signal and reduce the driving voltage of the control end of the third transistor 1122 according to the reverse connection signal, so that the third transistor 1122 turns from on to off, and the battery 200 is disconnected from the first power supply, thereby ensuring the safety of the circuit and the battery 200.

[0042] Optionally, the submodule 110 further includes a charging interface 120 , one end of the charging interface 120 is electrically connected to the third transistor 1122 , and the other end of the charging interface 120 is electrically connected to the output terminal A2 , and the battery 200 can be charged or discharged through the charging interface 120 .

[0043] Furthermore, when the positive and negative electrodes of the battery 200 are positively connected to the positive electrode C1 and the negative electrode C2 of the charging interface 120, the controller 300 controls the third transistor 1122 to turn on; when the positive and negative electrodes of the battery 200 are reversely connected to the positive and negative electrodes of the charging interface 120, the controller 300 controls the third transistor 1122 to turn off.

[0044] When the submodule 110 is in the charge and discharge state, the second transistor 1121 and the third transistor 1122 are turned on, the protection component 111 is disconnected from the first power supply, and the battery 200 is connected to the first power supply; when the submodule 110 is in the bypass state, the second transistor 1121 and / or the third transistor 1122 are turned off, the protection component 111 is connected to the first power supply, and the battery 200 is disconnected from the first power supply.

[0045] Specifically, the controller 300 can be electrically connected to the protection component 111 and the switch component 112, respectively, and the controller 300 can control the on and off of the protection component 111 and the switch component 112. When the battery 200 needs to be charged or discharged, the controller 300 controls the protection component 111 to be disconnected and the switch component 112 to be turned on, so that the battery 200 can be electrically connected to the first power source. When the battery 200 is in a static state or the battery 200 is reversely connected, the controller 300 can control the protection component 111 to be turned on and the switch component 112 to be turned off, so that the battery 200 can be disconnected from the first power source.

[0046] Optionally, the battery formation protection circuit 100 is electrically connected to an external controller 300, the controller 300 includes a second power supply, the controller 300 is electrically connected to the first power supply, the controller 300 can obtain an abnormal signal generated by the first power supply, the controller 300 can apply a first voltage and a second voltage to the base and emitter of the transistor Q1 respectively, and the controller 300 can control the first voltage to decrease according to the abnormal signal, so that the transistor Q1 is turned on. Among them, the abnormal signal is that the voltage value output by the first power supply exceeds the standard fluctuation range, and the standard fluctuation range of the voltage is preset according to the voltage required for the battery formation protection circuit 100 in the embodiment of the utility model to charge and discharge the battery 200, for example, the standard fluctuation range of the voltage can be ±5%, ±7% or ±10%, etc.

[0047] In an embodiment of the utility model, the first end B1 and the second end B2 of the controller 300 apply a 12V voltage to the emitter and the base of the transistor Q1 respectively. When the first power supply generates an abnormal signal, the controller 300 controls the first voltage of the base of the transistor Q1 to decrease, and the transistor Q1 is turned on. At this time, the second power supply applies a driving voltage to the control end of the first transistor 1111, so that the first transistor 1111 is turned on. At the same time, the controller 300 controls the second transistor 1121 and the third transistor 1122 to be disconnected, so that the submodule 110 switches from the charge and discharge state to the bypass state.

[0048] Optionally, at least one of the switch component 112 and the protection component 111 includes an N-channel enhancement type field effect transistor, that is, at least one of the first transistor 1111, the second transistor 1121, and the third transistor 1122 is an N-channel enhancement type field effect transistor.

[0049] like Figure 4 , Figure 5 As shown, part of the structure of the second embodiment of the battery formation protection circuit 100 of the utility model is the same as that of the first embodiment. The differences between the two will be described below, and the similarities will not be described in detail.

[0050] In the second embodiment of the utility model, the first transistor 1111, the second transistor 1121, and the third transistor 1122 are all N-channel enhancement type field effect transistors. The base and emitter of the PNP transistor are electrically connected to the second power supply of the controller 300. When the first power supply is normally output, the second power supply applies a voltage of 12V to the base and emitter of the transistor Q1, respectively. The control end of the first transistor 1111 is electrically connected to the collector of the PNP transistor, and the control ends of the second transistor 1121 and the third transistor 1122 are electrically connected to the controller 300, respectively.

[0051] The controller 300 can control the driving voltage of the control end of the second transistor 1121 and the third transistor 1122 of the switch component 112 to decrease from 12V to 0V, and at the same time control the driving voltage of the control end of the first transistor 1111 of the protection component 111 to increase from 0V to 12V, so that the submodule 110 switches from the charge-discharge state to the bypass state. Conversely, the controller 300 can control the driving voltage of the control end of the second transistor 1121 and the third transistor 1122 of the switch component 112 to increase from 0V to 12V, and at the same time control the driving voltage of the control end of the first transistor 1111 of the protection component 111 to decrease from 12V to 0V, so that the submodule 110 switches from the bypass state to the charge-discharge state.

[0052] It is easy to imagine that the first transistor 1111, the second transistor 1121, and the third transistor 1122 in the embodiment of the utility model can also be other types of MOS transistors such as P-channel MOS transistors, so as to realize the switching function and automatic protection function of the battery formation protection circuit 100 in the embodiment of the utility model, which is not limited here.

[0053] like Figure 6 , Figure 7 As shown, the present invention further proposes a battery formation protection device, which includes a battery formation protection circuit 100 of any of the aforementioned embodiments of the present invention and a controller 300, wherein the controller 300 is electrically connected to the protection component 111 and the switch component 112, and the controller 300 can control the on and off of the protection component 111 and the switch component 112 respectively.

[0054] The battery formation protection circuit 100 includes: at least one submodule 110, the submodule 110 can be electrically connected to the first power source and the battery 200 respectively, the submodule 110 includes a protection component 111 and a switch component 112, the protection component 111 and the switch component 112 are connected in parallel, and the submodule 110 has a charge and discharge state and a bypass state.

[0055] The switch component 112 can control the conduction and disconnection between the battery 200 and the power supply. The protection component 111 includes a transistor Q1 and a first transistor 1111. The collector of the transistor Q1 is electrically connected to the first transistor 1111, and the base and emitter of the transistor Q1 are electrically connected to the second power supply. When the transistor Q1 is in the on state, it can drive the first transistor 1111 to turn on, so that the submodule 110 is in a bypass state.

[0056] When the submodule 110 is in a charge and discharge state, the first power source can charge the battery 200 or the battery 200 can reversely discharge the first power source. When the submodule 110 is in a bypass state, the current input by the first power source flows through the first transistor 1111 and flows to the next submodule 110, and the battery 200 of the submodule 110 in the bypass state is disconnected from the first power source.

[0057] The battery formation protection device of the embodiment of the utility model includes a battery formation protection circuit 100. The submodule 110 of the battery formation protection circuit 100 can realize automatic protection of the battery 200 in the formation process through the protection component 111. When the voltage output by the first power supply is unstable, the transistor Q1 can be turned on and drive the first transistor 1111 to be turned on. When the first transistor 1111 is turned on, the switch component 112 is turned off, so that the submodule 110 can automatically switch from the charge and discharge state to the bypass state, disconnect the battery 200 from the first power supply, and protect the circuit and the battery 200, so that the battery formation protection device can avoid the problem of damage to the circuit or the battery 200 due to power supply abnormality.

[0058] 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.

[0059] 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.

[0060] 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 protection circuit, characterized in that: The battery formation protection circuit comprises: At least one submodule, the submodule can be electrically connected to the first power source and the battery respectively, the submodule includes a protection component and a switch component, the protection component is connected in parallel with the switch component, and the submodule has a charge and discharge state and a bypass state; The switch component can control the conduction and disconnection between the battery and the first power supply. The protection component includes a triode and a first transistor. The collector of the triode is electrically connected to the first transistor, and the base and emitter of the triode are electrically connected to the second power supply. When the triode is in the on state, it can drive the first transistor to turn on, so that the submodule is in the bypass state.

2. The battery formation protection circuit according to claim 1, characterized in that: The submodule further includes an input end and an output end, one end of the first transistor is electrically connected to the input end, the other end is electrically connected to the output end, and the control end of the first transistor is electrically connected to the triode.

3. The battery formation protection circuit according to claim 1, characterized in that: The transistor is a PNP transistor.

4. The battery formation protection circuit according to claim 2, characterized in that: The switch component includes a second transistor and a third transistor, one end of the second transistor is electrically connected to the input end, the other end is electrically connected to the third transistor, and the control end of the second transistor is electrically connected to an external controller.

5. The battery formation protection circuit according to claim 4, characterized in that: One end of the third transistor is electrically connected to the second transistor, the other end is electrically connected to the battery, and the control end of the third transistor is electrically connected to the controller; When the positive and negative electrodes of the battery are positively connected to the submodule, the controller controls the third transistor to be turned on; When the positive and negative electrodes of the battery are reversely connected to the submodule, the controller controls the third transistor to be turned off.

6. The battery formation protection circuit according to claim 5, characterized in that: The submodule further includes a charging interface, one end of which is electrically connected to the third transistor, 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.

7. The battery formation protection circuit according to claim 6, characterized in that: When the positive electrode and the negative electrode of the battery are positively connected to the positive electrode and the negative electrode of the charging interface, the controller controls the third transistor to be turned on; When the positive electrode and the negative electrode of the battery are reversely connected to the positive electrode and the negative electrode of the charging interface, the controller controls the third transistor to be turned off; The submodule is in the charge and discharge state, the second transistor and the third transistor are turned on, the protection component is disconnected from the first power supply, and the battery is connected to the first power supply; The submodule is in the bypass state, the second transistor and / or the third transistor is turned off, the protection component is connected to the first power source, and the battery is disconnected from the first power source.

8. The battery formation protection circuit according to claim 1, characterized in that: The battery formation protection circuit is electrically connected to an external controller, which includes the second power supply. The controller is electrically connected to the first power supply. The controller can obtain an abnormal signal generated by the first power supply, and apply a first voltage and a second voltage to the base and the emitter of the transistor respectively. The controller can control the first voltage to decrease according to the abnormal signal so that the transistor is turned on. The abnormal signal is that the voltage value output by the first power supply exceeds the standard fluctuation range.

9. The battery formation protection circuit according to any one of claims 1 to 8, characterized in that: At least one of the switch component and the protection component includes an N-channel enhancement type field effect transistor.

10. A battery formation protection device, characterized in that: The battery formation protection device comprises: The battery formation protection circuit according to any one of claims 1 to 9; and A controller is electrically connected to the protection component and the switch component, and the controller can control the on and off of the protection component and the switch component respectively.

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