Battery modular expansion protection circuit and energy storage power supply

Abstract

The present disclosure provides a battery modular expansion protection circuit and an energy storage power supply. The battery modular expansion protection circuit comprises a battery sampling control module and a battery protection module; the battery sampling control module comprises a sampling central controller and a battery equalization sampling submodule, the battery equalization sampling submodule comprises an equalization circuit and a plurality of RC sampling circuits; the sampling central controller has a fuse sampling end, a primary protection output end and a plurality of charge and discharge control ends. The sampling input of the sampling central controller samples the equalization running state of each battery, the sampling central controller outputs control signals through the plurality of charge and discharge control ends, various charge and discharge modules are conveniently connected, the sampling central controller outputs protection signals through the fuse sampling end and the primary protection output end, various protection modules are conveniently connected, and the signals received by each module are mutually compatible, so as to facilitate the expansion of the battery control module.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of batteries, in particular to a battery modular expansion protection circuit and an energy storage power supply. BACKGROUND

[0002] With the attention of the country to new energy, smart energy, energy storage and other industries or fields, these industries have developed rapidly in recent years. Distributed power generation based on photovoltaic, wind power and other new energy sources has received more and more attention in the field of electric power industry. Portable power supply is favored by various industries due to its mobility, versatility and portability. Mobility means that portable power supply can provide power for electronic devices in various extreme environments such as mountain tops, forests and underwater. Versatility means that portable power supply can provide power for various electronic devices (mobile phones, laptops, small engineering equipment, etc.). Portability is the biggest feature of portable power supply, which can adapt to various outdoor environments with its small size and convenient carrying method. Future application fields will expand to medical rescue, high-end electronic devices (such as unmanned aerial vehicles), electric tools, mobile office and other fields.

[0003] However, there is no mature portable and expandable modular energy storage power supply compatible with the market at present, especially one that can highly integrate battery sampling protection to provide subsequent external expansion of battery internal BMS. CONTENT OF THE INVENTION

[0004] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide a battery modular expansion protection circuit and an energy storage power supply which are highly integrated, modular and convenient for expansion of battery control modules.

[0005] The purpose of the present disclosure is achieved by the following technical solutions:

[0006] A battery modular expansion protection circuit, comprising: a battery sampling control module and a battery protection module; the battery sampling control module comprises a sampling central controller and a battery equalization sampling sub-module, the battery equalization sampling sub-module comprises an equalization circuit and a plurality of RC sampling circuits, the RC sampling circuit comprises a sampling resistor and an energy storage capacitor, the first end of the sampling resistor is connected with one equalization sampling end of the equalization circuit, the second end of the sampling resistor is connected with the first end of the energy storage capacitor, the second end of the energy storage capacitor is connected with the first end of the energy storage capacitor of the adjacent RC sampling circuit, and the second end of the sampling resistor is also connected with one sampling input end of the sampling central controller; the sampling central controller has a fuse sampling end, a first protection output end and a plurality of charge-discharge control ends, the charge-discharge control end is used for controlling the on-off of the MOS tube of each charge-discharge module, the fuse sampling end is used for sampling the battery charge-discharge voltage, and the first protection output end is used for controlling the on-off of the battery charge-discharge fuse; the input end of the battery protection module is connected with the first end of the sampling resistor, and the output end of the battery protection module is used for disconnecting the battery charge-discharge fuse in the secondary protection of the battery charge-discharge.

[0007] In one of the embodiments, the battery sampling control module further comprises a fuse sampling resistor and a fuse sampling capacitor, the first end of the fuse sampling resistor is connected with the positive electrode of the battery charge-discharge fuse, the second end of the fuse sampling resistor is connected with the fuse sampling end, and the second end of the fuse sampling resistor is also grounded through the fuse sampling capacitor.

[0008] In one of the embodiments, the battery protection module comprises a battery protection central controller and a plurality of protection sampling circuits, the protection sampling circuit comprises a first resistor and a first capacitor, the first end of the first resistor is connected with the first end of the sampling resistor, the second end of the first resistor is connected with the first end of the first capacitor, the second end of the first resistor is also connected with one protection sampling input end of the battery protection module, and the second end of the first capacitor is connected with the first end of the first capacitor of the adjacent protection sampling circuit.

[0009] In one of the embodiments, the battery modular expansion protection circuit further comprises a battery temperature sampling circuit, the battery temperature sampling circuit comprises a first thermistor and a second resistor, the first end of the first thermistor is connected with the first temperature sampling end of the sampling central controller, the second end of the first thermistor is grounded through the second resistor, and the first thermistor is used for sensing the surface temperature of the battery.

[0010] In one of the embodiments, the battery temperature sampling circuit further comprises a second capacitor, the first end of the second capacitor is connected with the second end of the first thermistor, and the second end of the second capacitor is grounded.

[0011] In one of the embodiments, the second resistor is an adjustable resistor.

[0012] In one of the embodiments, the battery modular expansion protection circuit further comprises a MOS temperature sampling circuit, the MOS temperature sampling circuit comprising a second thermistor and a third resistor, a first end of the second thermistor being connected with a second temperature sampling end of the sampling central controller, a second end of the second thermistor being grounded through the third resistor, and the second thermistor being used for sensing the surface temperature of the charging and discharging MOS.

[0013] In one of the embodiments, the MOS temperature sampling circuit further comprises a third capacitor, a first end of the third capacitor being connected with the second end of the second thermistor, and a second end of the third capacitor being grounded.

[0014] In one of the embodiments, the third resistor is an adjustable resistor.

[0015] A power storage supply comprising the battery modular expansion protection circuit according to any one of the embodiments.

[0016] Compared with the prior art, the present disclosure has at least the following advantages:

[0017] The sampling input of the sampling central controller samples the balanced running state of each battery, the sampling central controller outputs control signals through a plurality of charging and discharging control ends, various charging and discharging modules are conveniently connected, the sampling central controller outputs protection signals through a fuse sampling end and a primary protection output end, various protection modules are conveniently connected, the signals received by each of the connected modules are compatible with each other, so as to facilitate the expansion of the battery control module, and the battery sampling and battery protection are integrated in the same circuit, thereby effectively improving the integration of the battery modular expansion protection circuit. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some of the embodiments of the present disclosure, and therefore should not be considered as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0019] Figure 1 A circuit diagram of the battery modular expansion protection circuit in one of the embodiments;

[0020] Figure 2 A schematic diagram of the battery equalization sampling sub-module in the battery modular expansion protection circuit shown in Figure 1

[0021] Figure 3 A schematic diagram of the battery equalization sampling sub-module in the battery modular expansion protection circuit shown in Figure 1 ​A partial schematic diagram of a battery modular expansion protection circuit.

[0022] Figure 4 A schematic diagram of a battery protection module in the battery modular expansion protection circuit. Figure 1 A schematic diagram of a battery protection module in the battery modular expansion protection circuit.

[0023] Figure 5 A circuit diagram of a battery temperature sampling circuit in an embodiment.

[0024] Figure 6 A circuit diagram of a MOS temperature sampling circuit in an embodiment. DETAILED DESCRIPTION

[0025] For the purposes of this disclosure, reference will be made to the accompanying drawings which form a part of the disclosure. The drawings are schematic and schematic illustrations of preferred embodiments of this disclosure. It is understood that the disclosures provided herein are not limited to the embodiments set forth in the attached drawings. Rather, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the disclosure. Various implementations of the disclosure will now be described with reference to the drawings, wherein:

[0026] It should be noted that when an element as a means plus function is recited in the claims, such disclosure is intended to encompass structures that are functionally equivalent to that specifically recited in the claims. It should be understood that the terms "comprises", "comprising", "includes", "including" and the like are used herein to mean either "inclusive" or "open ended" and therefore specify the presence of stated features but do not preclude the presence or addition of one or more other features. It should also be noted that, as used in the specification and the appended claims, the singular form "a", "an" and "the" include plural references unless the context clearly dictates otherwise. The terms "coupled" and "connected", along with derivatives thereof, are intended to encompass connections, attachments, associations, coupling, combinations, mounting arrangements, and / or the like that physically, electrically, and / or magnetically connect or associate one element to another element.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this description, the terms "may" and "can" include any one of, or all of, the possible equivalents including combinations of the associated listed items.

[0028] The present disclosure relates to a battery modular extension protection circuit. In one embodiment, the battery modular extension protection circuit comprises a battery sampling control module and a battery protection module; the battery sampling control module comprises a sampling central controller and a battery equalization sampling sub-module, the battery equalization sampling sub-module comprises an equalization circuit and a plurality of RC sampling circuits, the RC sampling circuit comprises a sampling resistor and an energy storage capacitor, a first end of the sampling resistor is connected with an equalization sampling end of the equalization circuit, a second end of the sampling resistor is connected with a first end of the energy storage capacitor, a second end of the energy storage capacitor is connected with a first end of an energy storage capacitor of an adjacent RC sampling circuit, and the second end of the sampling resistor is also connected with a sampling input end of the sampling central controller; the sampling central controller has a fuse sampling end, a primary protection output end and a plurality of charge-discharge control ends, the charge-discharge control ends are used to control the on-off of MOS tubes of each charge-discharge module, the fuse sampling end is used to sample the charge-discharge voltage of the battery, and the primary protection output end is used to control the on-off of the battery charge-discharge fuse; an input end of the battery protection module is connected with the first end of the sampling resistor, and an output end of the battery protection module is used to disconnect the battery charge-discharge fuse when performing secondary protection of the battery. The sampling input of the sampling central controller samples the equalization running state of each battery, the sampling central controller outputs control signals through the plurality of charge-discharge control ends, various charge-discharge modules are conveniently connected, the sampling central controller outputs protection signals through the fuse sampling end and the primary protection output end, various protection modules are conveniently connected, the signals received by each connected module are mutually compatible, so as to facilitate the extension of the battery control module, and the battery sampling and the battery protection are integrated in the same circuit, thereby effectively improving the integration of the battery modular extension protection circuit.

[0029] Please refer to Figure 1 which is a circuit diagram of the battery modular extension protection circuit according to one embodiment of the present disclosure.

[0030] The battery modular extension protection circuit 10 according to one embodiment comprises a battery sampling control module 100 and a battery protection module 200. The battery sampling control module 100 comprises a sampling central controller U4 and a battery equalization sampling sub-module 110, and the battery equalization sampling sub-module 110 comprises an equalization circuit 112 and a plurality of RC sampling circuits 114. Please refer to Figure 2The RC sampling circuit 114 comprises a sampling resistor R61 and an energy storage capacitor C16. The first end of the sampling resistor R61 is connected with one equalization sampling end of the equalization circuit 112. The second end of the sampling resistor R61 is connected with the first end of the energy storage capacitor C16. The second end of the energy storage capacitor C16 is connected with the first end of the energy storage capacitor C16 of the adjacent RC sampling circuit 114. The second end of the sampling resistor R61 is also connected with one sampling input end of the sampling control unit U4. The sampling control unit U4 has a fuse sampling end, a first protection output end and a plurality of charge and discharge control ends. The charge and discharge control ends are used to control the on-off of the MOS tube of each charge and discharge module. The fuse sampling end is used to sample the battery charge and discharge voltage. The first protection output end is used to control the on-off of the battery charge and discharge fuse. The input end of the battery protection module 200 is connected with the first end of the sampling resistor R61. The output end of the battery protection module 200 is used to disconnect the battery charge and discharge fuse when the second protection is performed.

[0031] In the embodiment, the sampling input end of the sampling control unit U4 samples the equalization running state of each battery. The sampling control unit U4 outputs control signals through the plurality of charge and discharge control ends, so as to facilitate the external connection of various charge and discharge modules. The sampling control unit U4 outputs protection signals through the fuse sampling end and the first protection output end, so as to facilitate the external connection of various protection modules. The signals received by each module can be compatible with each other, so as to facilitate the expansion of the battery control module. Moreover, the battery sampling and the battery protection are integrated in the same circuit, so as to effectively improve the integration of the battery modular expansion protection circuit.

[0032] In one of the embodiments, please refer to Figure 3 The battery sampling control module 100 further comprises a fuse sampling resistor R136 and a fuse sampling capacitor C102. The first end of the fuse sampling resistor R136 is connected with the positive electrode of the battery charge and discharge fuse. The second end of the fuse sampling resistor R136 is connected with the fuse sampling end. The second end of the fuse sampling resistor R136 is also grounded through the fuse sampling capacitor C102. In the embodiment, the fuse sampling resistor R136 and the fuse sampling capacitor C102 form an RC sampling circuit 114. The fuse sampling resistor R136 collects the current or voltage on the battery charge and discharge fuse. The charge of the fuse sampling capacitor C102 is used to facilitate the sampling control unit U4 to monitor the overload condition of the battery during the charging and discharging process, so as to facilitate the protection and monitoring of the battery.

[0033] In one of the embodiments, please refer to Figure 4The battery protection module 200 includes a battery protection central controller U3 and a plurality of protection sampling circuits 210. The protection sampling circuit 210 includes a first resistor R63 and a first capacitor C53. The first end of the first resistor R63 is connected with the first end of the sampling resistor R61. The second end of the first resistor R63 is connected with the first end of the first capacitor C53. The second end of the first resistor R63 is also connected with a protection sampling input end of the battery protection module 200. The second end of the first capacitor C53 is connected with the first end of the first capacitor C53 of an adjacent protection sampling circuit 210. In the embodiment, the battery protection central controller U3 is a main control chip for charging and discharging protection of the battery. The plurality of protection sampling circuits 210 sample the charging and discharging states of a plurality of batteries to determine whether the current state of each battery is abnormal.

[0034] In one embodiment, referring to Figure 5 The battery modular expansion protection circuit 10 further includes a battery temperature sampling circuit 300. The battery temperature sampling circuit 300 includes a first thermistor R142 and a second resistor R146. The first end of the first thermistor R142 is connected with the first temperature sampling end of the sampling central controller U4. The second end of the first thermistor R142 is grounded through the second resistor R146. The first thermistor R142 is used for sensing the surface temperature of the battery. In the embodiment, the first thermistor R142 is used as a sampling resistor R61 for the surface temperature of the battery. The first thermistor R142 and the second resistor R146 form a sampling voltage dividing circuit. The sampled voltage is determined by the resistance ratio of the first thermistor R142 and the second resistor R146. For example, the second resistor R146 is an adjustable resistor. The resistance ratio of the first thermistor R142 and the second resistor R146 is adjustable. The overheat condition of each battery during the charging and discharging process is determined. The charging and discharging states of each battery are adjusted through the charging and discharging control end.

[0035] Further, the battery temperature sampling circuit 300 further comprises a second capacitor C73, a first end of the second capacitor C73 is connected with a second end of the first thermistor R142, and a second end of the second capacitor C73 is grounded. In the embodiment, the second capacitor C73 is connected in parallel across the second resistor R146, and the second capacitor C73 serves as an energy storage capacitor C16 on the second resistor R146, so as to facilitate stable storage of the electric charge on the second resistor R146, thereby facilitating accurate sampling of the voltage on the first thermistor R142, and further facilitating accurate sampling of the surface temperature of the battery.

[0036] In one of the embodiments, referring to Figure 6 The battery modular expansion protection circuit 10 further comprises a MOS temperature sampling circuit 400, the MOS temperature sampling circuit 400 comprises a second thermistor R121 and a third resistor R147, a first end of the second thermistor R121 is connected with a second temperature sampling end of the sampling central controller U4, a second end of the second thermistor R121 is grounded through the third resistor R147, and the second thermistor R121 is used for sensing the surface temperature of the charge-discharge MOS. In the embodiment, the second thermistor R121 serves as a sampling resistor R61 for the surface temperature of the charge-discharge MOS, and the second thermistor R121 and the third resistor R147 form a sampling voltage dividing circuit. The sampled voltage is determined by the resistance ratio of the second thermistor R121 and the third resistor R147. For example, the third resistor R147 is an adjustable resistor, so that the resistance ratio of the second thermistor R121 and the third resistor R147 is adjustable, thereby facilitating determination of the overheating condition of each charge-discharge MOS in the charging and discharging process, and further facilitating adjustment of the working state of each charge-discharge MOS through the charge-discharge control end.

[0037] Further, the MOS temperature sampling circuit 400 further comprises a third capacitor C74, a first end of the third capacitor C74 is connected with a second end of the second thermistor R121, and a second end of the third capacitor C74 is grounded. In the embodiment, the third capacitor C74 is connected in parallel across the third resistor R147, and the third capacitor C74 serves as an energy storage capacitor C16 on the third resistor R147, so as to facilitate stable storage of the electric charge on the third resistor R147, thereby facilitating accurate sampling of the voltage on the second thermistor R121, and further facilitating accurate sampling of the surface temperature of the charge-discharge MOS.

[0038] In one of the embodiments, the disclosure further provides a battery modular expansion protection circuit, comprising the battery modular expansion protection circuit of any one of the above embodiments. In this embodiment, the battery modular expansion protection circuit comprises a battery sampling control module and a battery protection module; the battery sampling control module comprises a sampling central controller and a battery equalization sampling sub-module, the battery equalization sampling sub-module comprises an equalization circuit and a plurality of RC sampling circuits, the RC sampling circuit comprises a sampling resistor and an energy storage capacitor, a first end of the sampling resistor is connected with one equalization sampling end of the equalization circuit, a second end of the sampling resistor is connected with a first end of the energy storage capacitor, a second end of the energy storage capacitor is connected with a first end of an energy storage capacitor of an adjacent RC sampling circuit, and the second end of the sampling resistor is also connected with a sampling input end of the sampling central controller; the sampling central controller has a fuse sampling end, a primary protection output end and a plurality of charge-discharge control ends, the charge-discharge control ends are used to control the on-off of MOS tubes of each charge-discharge module, the fuse sampling end is used to sample the charge-discharge voltage of the battery, and the primary protection output end is used to control the on-off of the battery charge-discharge fuse; an input end of the battery protection module is connected with the first end of the sampling resistor, and an output end of the battery protection module is used to disconnect the battery charge-discharge fuse when performing secondary protection of the battery. The sampling input end of the sampling central controller samples the equalization running state of each battery, the sampling central controller outputs control signals through the plurality of charge-discharge control ends, various charge-discharge modules are conveniently connected, the sampling central controller outputs protection signals through the fuse sampling end and the primary protection output end, various protection modules are conveniently connected, the signals received by each connected module are compatible with each other, so as to facilitate the expansion of the battery control module, and the battery sampling and the battery protection are integrated in the same circuit, thereby effectively improving the integration of the battery modular expansion protection circuit.

[0039] The above embodiments only express several embodiments of the disclosure, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent of the disclosure. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the disclosure, several modifications and improvements can be made, which are within the protection scope of the disclosure. Therefore, the protection scope of the patent of the disclosure should be subject to the appended claims.

Claims

1. A modular extended protection circuit for batteries, characterized in that, include: A battery sampling control module includes a sampling controller and a battery balancing sampling submodule. The battery balancing sampling submodule includes an balancing circuit and multiple RC sampling circuits. Each RC sampling circuit includes a sampling resistor and an energy storage capacitor. The first end of the sampling resistor is connected to an balancing sampling terminal of the balancing circuit, and the second end of the sampling resistor is connected to the first end of the energy storage capacitor. The second end of the energy storage capacitor is connected to the first end of the energy storage capacitor of an adjacent RC sampling circuit. The second end of the sampling resistor is also connected to a sampling input terminal of the sampling controller. The sampling controller has a fuse sampling terminal, a primary protection output terminal, and multiple charge / discharge control terminals. The charge / discharge control terminals are used to control the on / off state of the MOS transistors of each charge / discharge module. The fuse sampling terminal is used to sample the battery charge / discharge voltage, and the primary protection output terminal is used to control the on / off state of the battery charge / discharge fuse. A battery protection module, wherein the input terminal of the battery protection module is connected to the first terminal of the sampling resistor, and the output terminal of the battery protection module is used to disconnect the battery charging and discharging fuse during the secondary protection of battery charging and discharging.

2. The battery modular extended protection circuit according to claim 1, characterized in that, The battery sampling control module also includes a fusible sampling resistor and a fusible sampling capacitor. The first end of the fusible sampling resistor is connected to the positive terminal of the battery charging and discharging fuse, the second end of the fusible sampling resistor is connected to the fusible sampling terminal, and the second end of the fusible sampling resistor is also grounded through the fusible sampling capacitor.

3. The battery modular extended protection circuit according to claim 1, characterized in that, The battery protection module includes a battery protection controller and multiple protection sampling circuits. Each protection sampling circuit includes a first resistor and a first capacitor. The first end of the first resistor is connected to the first end of the sampling resistor, the second end of the first resistor is connected to the first end of the first capacitor, the second end of the first resistor is also connected to a protection sampling input terminal of the battery protection module, and the second end of the first capacitor is connected to the first end of the first capacitor of the adjacent protection sampling circuit.

4. The battery modular extended protection circuit according to claim 1, characterized in that, The battery modular extended protection circuit also includes a battery temperature sampling circuit, which includes a first thermistor and a second resistor. The first end of the first thermistor is connected to the first temperature sampling end of the sampling controller, and the second end of the first thermistor is grounded through the second resistor. The first thermistor is used to sense the surface temperature of the battery.

5. The battery modular extended protection circuit according to claim 4, characterized in that, The battery temperature sampling circuit also includes a second capacitor, the first end of which is connected to the second end of the first thermistor, and the second end of the second capacitor is grounded.

6. The battery modular extended protection circuit according to claim 4, characterized in that, The second resistor is an adjustable resistor.

7. The battery modular extended protection circuit according to claim 1, characterized in that, The battery modular extended protection circuit also includes a MOS temperature sampling circuit, which includes a second thermistor and a third resistor. The first end of the second thermistor is connected to the second temperature sampling terminal of the sampling controller, and the second end of the second thermistor is grounded through the third resistor. The second thermistor is used to sense the surface temperature of the MOS during charging and discharging.

8. The battery modular extended protection circuit according to claim 7, characterized in that, The MOS temperature sampling circuit also includes a third capacitor, the first end of which is connected to the second end of the second thermistor, and the second end of the third capacitor is grounded.

9. The battery modular extended protection circuit according to claim 7, characterized in that, The third resistor is an adjustable resistor.

10. An energy storage power source, characterized in that, Includes the battery modular extended protection circuit as described in any one of claims 1 to 9.

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