Control circuit and control equipment for carrying out auxiliary discharge on battery

Abstract

The utility model relates to the technical field of batteries, and discloses a control circuit and control equipment for carrying out auxiliary discharge on a battery, and the control circuit comprises an energy storage control circuit with a first end electrically connected with a positive electrode of a battery module and a second end electrically connected with a negative electrode of the battery module, the energy storage control circuit and the battery module are both in communication connection with the main control module through a wireless communication network, the control end of the main control circuit is electrically connected with the controlled end of the energy storage control circuit, and the energy storage control circuit is provided with a PACK interface used for being electrically connected with a load; when the battery discharges the load, the state of the energy storage control circuit is controlled through the main control circuit according to the battery data and the energy storage related data; and the electric quantity of the energy storage control circuit is output to a load through the energy storage control circuit so as to realize auxiliary discharging of the battery module. Therefore, auxiliary discharge of the battery can be accurately realized by arranging the energy storage control circuit, so that the use requirement of large-current discharge is met, and the discharge performance of the battery is favorably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a control circuit and control device for auxiliary discharging of battery. BACKGROUND

[0002] With the progress of related technologies in the field of electric vehicles and the gradual improvement of battery performance, the 12V lead-acid battery used in traditional pure electric vehicles is gradually replaced by lithium batteries because of its low discharge performance at low temperature (discharge performance can include discharge voltage, discharge capacity, discharge rate, cycle life and sudden large current discharge capability, etc.).

[0003] However, it is found in practice that although the discharge performance of lithium batteries at low temperature is improved compared with lead-acid batteries, the existing lithium battery discharge scheme cannot support large current instantaneous discharge due to the limitation of the existing lithium battery capacity in response to the demand for sudden large current discharge, resulting in the inability to meet the use demand of large current discharge, that is, the sudden large current discharge capability of the existing lithium battery discharge scheme is low. It can be seen that it is particularly important to propose a new battery discharge scheme to improve the discharge performance of the battery at low temperature. UTILITY MODEL CONTENT

[0004] The present application provides a control circuit and control device for auxiliary discharging of battery, which can meet the use demand of large current discharge and is beneficial to improve the discharge performance of the battery.

[0005] In order to solve the above technical problems, the present application discloses a control circuit for auxiliary discharging of battery, which comprises a main control circuit and an energy storage control circuit, wherein:

[0006] The first end of the energy storage control circuit is used for electrically connecting the positive electrode of the battery module, the second end of the energy storage control circuit is used for electrically connecting the negative electrode of the battery module, the energy storage control circuit and the battery module are both in communication connection with the main control module through a wireless communication network, the control end of the main control circuit is electrically connected with the controlled end of the energy storage control circuit, and the energy storage control circuit is provided with a PACK interface for electrically connecting a load;

[0007] The main control circuit is used for controlling the state of the energy storage control circuit according to the received battery data of the battery module and the energy storage related data of the energy storage control circuit when the battery module discharges the load;

[0008] The energy storage control circuit is used for outputting the electric quantity of the energy storage control circuit to the load under the control of the main control circuit, so as to realize the auxiliary discharging of the battery module.

[0009] As an optional implementation, in the first aspect of the present application, the energy storage control circuit comprises an energy storage module and a first switch module, wherein:

[0010] The first end of the energy storage module is electrically connected to the first end of the first switch module, the second end of the first switch module is used for electrically connecting the positive electrode of the battery module, the third end of the first switch module is electrically connected to the control end of the master control circuit, the second end of the energy storage module is used for electrically connecting the negative electrode of the battery module, the controlled end of the energy storage module is electrically connected to the control end of the master control circuit, and the energy storage module is in communication connection with the master control module through the wireless communication network;

[0011] The first switch module is used for controlling the state of the first switch module under the control of the master control circuit, and outputting the electric quantity of the energy storage module to the load when the first switch module is in the closed state, so as to realize the auxiliary discharge of the battery module.

[0012] As an optional implementation, in the first aspect of the present application, the energy storage module comprises a super capacitor module and a first current detection unit, wherein:

[0013] The first end of the super capacitor module is electrically connected to the first end of the first switch module, the second end of the super capacitor module is electrically connected to the first end of the first current detection unit, the controlled end of the super capacitor module is electrically connected to the control end of the master control circuit, the second end of the first current detection unit is used for electrically connecting the negative electrode of the battery module, and the first current detection unit is in communication connection with the master control module through the wireless communication network.

[0014] As an optional implementation, in the first aspect of the present application, the energy storage control circuit further comprises an equalization control module, wherein:

[0015] The first input end of the equalization control module is electrically connected to the third end of the first current detection unit, the second input end of the equalization control module is electrically connected to the third end of the super capacitor module, and the output end of the equalization control module is electrically connected to the fourth end of the super capacitor module.

[0016] The equalization control module is used for monitoring the voltage of the super capacitor module and the current of the super capacitor module sent by the first current detection unit, and performing equalization control operation on each capacitor contained in the super capacitor module according to the voltage and the current of the super capacitor module.

[0017] As an optional implementation, in the first aspect of the present application, a communication interface is arranged between the equalization control module and the master control circuit, for sending the voltage and current of the super capacitor module to the master control circuit, and for sending the equalization control instruction from the master control circuit to the equalization control module, so that the master control circuit controls the equalization control module to perform the equalization control operation on each capacitor included in the super capacitor module.

[0018] As an optional implementation, in the first aspect of the present application, the circuit further comprises a pre-charging module, and the pre-charging module comprises a second switch module and a voltage conversion module, wherein:

[0019] The first end of the second switch module is electrically connected to the second end of the first switch module included in the energy storage control circuit, and is used for electrically connecting the positive electrode of the battery module. The output end of the voltage conversion module is electrically connected to the second end of the first current detection unit included in the energy storage control circuit, and is used for electrically connecting the negative electrode of the battery module. The input end of the voltage conversion module is electrically connected to the second end of the second switch module. The power supply end of the voltage conversion module is used for electrically connecting a preset battery pack.

[0020] The second switch module is used for providing the voltage output by the battery module to the energy storage control circuit when the second switch module is in an open state, and / or providing the voltage output by the battery pack to the energy storage control circuit through the voltage conversion module when the second switch module is in a closed state.

[0021] As an optional implementation, in the first aspect of the present application, the circuit further comprises the battery module, and the battery module comprises a cell module and a second current detection unit, wherein:

[0022] The positive electrode of the cell module is electrically connected to the second end of the first switch module and the second end of the second switch module. The negative electrode of the cell module is electrically connected to the first end of the second current detection unit. The second end of the second current detection unit is electrically connected to the output end of the voltage conversion module and the second end of the first current detection unit. The second current detection unit is communicatively connected to the master control module through the wireless communication network.

[0023] The second current detection unit is used for detecting the current of the cell module, and sending the current of the cell module to the master control module, so that the master control module calculates the state of charge of the cell module according to the current of the cell module, and determines the current of the cell module and the state of charge of the cell module as the battery data of the battery module.

[0024] The second aspect of the present application discloses a control method for auxiliary discharging of a battery. The method is applied to a control circuit for auxiliary discharging of a battery, and the circuit comprises a master control circuit and an energy storage control circuit. The first end of the energy storage control circuit is used for electrically connecting the positive electrode of a battery module, the second end of the energy storage control circuit is used for electrically connecting the negative electrode of the battery module, the energy storage control circuit and the battery module are both in communication connection with the master control module through a wireless communication network, the control end of the master control circuit is electrically connected with the controlled end of the energy storage control circuit, and the energy storage control circuit is provided with a PACK interface for electrically connecting a load. The method comprises the following steps:

[0025] When the battery module discharges the load, the master control circuit controls the state of the energy storage control circuit according to the received battery data of the battery module and the energy storage related data of the energy storage control circuit.

[0026] Under the control of the master control circuit, the energy storage control circuit outputs the electric quantity of the energy storage control circuit to the load to realize auxiliary discharging of the battery module.

[0027] As an optional implementation, in the second aspect of the present application, the energy storage related data comprises one or more of a combination of the capacitor voltage data, the capacitor temperature data and the capacitor current data.

[0028] In addition, the master control circuit controls the state of the energy storage control circuit according to the received battery data of the battery module and the energy storage related data of the energy storage control circuit, which comprises the following steps:

[0029] The master control circuit determines whether the current condition of the energy storage control circuit meets a preset switch opening condition according to one of the received capacitor voltage data, capacitor temperature data and capacitor current data of the energy storage control circuit.

[0030] When it is determined that the current condition of the energy storage control circuit meets the switch opening condition, the master control circuit controls the energy storage control circuit to be in an open state; and / or,

[0031] The master control circuit determines whether the current condition of the energy storage control circuit meets a preset switch closing condition according to one of the received capacitor voltage data, capacitor temperature data of the energy storage control circuit and the battery data of the battery module.

[0032] When it is determined that the current condition of the energy storage control circuit meets the switch closing condition, the master control circuit controls the energy storage control circuit to be in a closed state.

[0033] The third aspect of this application discloses a control device, which includes a device body and a control circuit for auxiliary discharge of a battery disclosed in the first aspect of this application.

[0034] Implementing this application will have the following beneficial effects:

[0035] This application provides a control circuit for auxiliary discharge of a battery. The control circuit includes a main control circuit and an energy storage control circuit. A first terminal of the energy storage control circuit is electrically connected to the positive terminal of the battery module, and a second terminal is electrically connected to the negative terminal of the battery module. Both the energy storage control circuit and the battery module are communicatively connected to the main control circuit via a wireless communication network. The control terminal of the main control circuit is electrically connected to the controlled terminal of the energy storage control circuit. The energy storage control circuit is provided with a PACK interface for electrically connecting to a load. The main control circuit controls the state of the energy storage control circuit based on received battery data from the battery module and energy storage-related data from the energy storage control circuit when the battery module discharges to the load. Under the control of the main control circuit, the energy storage control circuit outputs its own power to the load to achieve auxiliary discharge of the battery module. As can be seen, this application can, by setting up an energy storage control circuit, output the energy of the energy storage control circuit to the load under the control of the main control circuit when the battery module discharges to the load, so as to accurately realize the auxiliary discharge of the battery module, meet the use requirements of sudden high current discharge of the load, and improve the battery discharge performance. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of a control circuit for auxiliary discharge of a battery disclosed in an embodiment of this application;

[0038] Figure 2 This is a schematic diagram of the structure of an energy storage control circuit disclosed in an embodiment of this application;

[0039] Figure 3 This is a schematic diagram of another control circuit for auxiliary discharge of a battery disclosed in an embodiment of this application;

[0040] Figure 4is a schematic diagram of a control circuit architecture for assisting the discharge of a battery according to an embodiment of the present application;

[0041] Figure 5 is a schematic diagram of a control method for assisting the discharge of a battery according to an embodiment of the present application;

[0042] Figure 6 is a schematic diagram of a control device according to an embodiment of the present application. DETAILED DESCRIPTION

[0043] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative work fall within the scope of protection of the present application.

[0044] It should be noted that, unless otherwise explicitly specified and limited, the terms "electrically connected" in the specification and claims of the present application and the above-described drawings should be understood in a broad sense, for example, it can be a fixed electrically connected, or a detachable electrically connected, or integrally electrically connected; it can be a mechanical electrically connected, or an electrical electrically connected, or it can be in communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements.

[0045] The terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product, or end including a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units not listed, or optionally includes other steps or units inherent to the process, method, product, or end.

[0046] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor does it necessarily refer to a separate or alternative embodiment in isolation or in combination with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0047] The application discloses a control circuit and a control device for auxiliary discharging of a battery.

[0048] Embodiment one

[0049] Please refer to Figure 1 , Figure 1 is a structural schematic view of a control circuit for auxiliary discharging of a battery disclosed by the embodiment of the application. Wherein, Figure 1 The control circuit for auxiliary discharging of a battery described above can be applied to any electronic product (such as an electric vehicle) that needs auxiliary discharging of a battery, and the embodiment of the application is not limited. As shown in Figure 1 The control circuit for auxiliary discharging of a battery includes a main control circuit 101 and an energy storage control circuit 102, wherein:

[0050] The first end of the energy storage control circuit 102 is used for electrically connecting the positive pole of the battery module 103 (that is, BAT+ shown in Figure 1 The second end of the energy storage control circuit 102 is used for electrically connecting the negative pole of the battery module 103 (that is, BAT- shown in Figure 1 The energy storage control circuit 102 and the battery module 103 are both in communication connection with the main control module through a wireless communication network, the control end of the main control circuit 101 is electrically connected with the controlled end of the energy storage control circuit 102, the energy storage control circuit 102 is provided with a PACK interface 104, which is used for electrically connecting a load 105;

[0051] The main control circuit 101 is used for, when the battery module 103 discharges the load 105, controlling the state of the energy storage control circuit 102 according to the received battery data of the battery module 103 and the energy storage related data of the energy storage control circuit 102;

[0052] The energy storage control circuit 102 is used for, under the control of the main control circuit 101, outputting the electric quantity of the energy storage control circuit 102 to the load 105, so as to realize auxiliary discharging of the battery module 103.

[0053] The battery data can include one or more of a combination of battery voltage, battery temperature, current of a branch where the battery is located, and number of batteries.

[0054] Specifically, when the battery data of the battery module 103 indicates that the battery module 103 is discharging the load 105 (such as an electric vehicle), the main control circuit 101 determines whether the energy storage control circuit 102 needs to be used to assist the discharge of the battery module 103 according to the energy storage related data of the energy storage control circuit 102. When the determination result is yes, the energy storage control circuit 102 is turned on so that the energy storage control circuit 102 outputs the electric quantity of the energy storage control circuit 102 to the load 105 under the on-off control of the main control circuit 101, thereby assisting the discharge of the battery module 103.

[0055] Optionally, the main control circuit 101 includes a control chip and a peripheral circuit thereof, where the control chip can be an MCU (Microcontroller Unit), a Soc (System on Chip), or other chips capable of performing the same control function, and the embodiments of the present application are not limited thereto.

[0056] It can be seen that the embodiments of the present application can accurately achieve the auxiliary discharge of the battery module 103 to meet the use requirement of the load 105 for burst discharge of large current, and improve the discharge performance of the battery. Figure 1 The control circuit for assisting the discharge of the battery can output the electric quantity of the energy storage control circuit 102 to the load 105 under the control of the main control circuit 101 when the battery module 103 discharges the load 105, thereby accurately achieving the auxiliary discharge of the battery module 103 to meet the use requirement of the load 105 for burst discharge of large current, and improving the discharge performance of the battery.

[0057] In an optional embodiment, as shown in FIG. 1, Figure 2 Figure 2 is a structural schematic diagram of an energy storage control circuit according to an embodiment of the present application, where the energy storage control circuit 102 includes an energy storage module 1021 and a first switch module 1022, and the energy storage module 1021 includes a super capacitor module 10211.

[0058] ​The first end of the energy storage module 1021 is electrically connected to the first end of the first switch module 1022, the second end of the first switch module 1022 is used for electrically connecting the positive electrode of the battery module 103, the third end of the first switch module 1022 is electrically connected to the control end of the master control circuit 101, the second end of the energy storage module 1021 is used for electrically connecting the negative electrode of the battery module 103, the controlled end of the energy storage module 1021 is electrically connected to the control end of the master control circuit 101, and the energy storage module 1021 is in communication connection with the master control module through a wireless communication network;

[0059] The first switch module 1022 is used for controlling the state of the first switch module 1022 under the control of the master control circuit 101, and outputting the electric quantity of the energy storage module 1021 to the load 105 when the first switch module 1022 is in a closed state, so as to realize auxiliary discharge of the battery module 103.

[0060] Optionally, the first switch module 1022 can include a DC-DC converter (i.e., a direct current-direct current converter), a MOS tube, a small relay or other components or modules capable of playing the same switching role, and the embodiments of the present application are not limited.

[0061] Specifically, the control end of the master control circuit 101 can be an IO port (such as an IO port of an MCU) of the master control circuit 101, which is used for controlling the state of the switching device included in the first switch module 1022 through the control signal output by the IO port. When the first switch module 1022 is closed, the energy storage module 1021 is turned on at this time, and the electric quantity of the energy storage module 1021 can be output to the load 105; when the first switch module 1022 is disconnected, the energy storage module 1021 is not turned on at this time, and the electric quantity of the energy storage module 1021 cannot be output to the load 105.

[0062] It can be seen that the optional embodiment can accurately realize the conduction control of the energy storage module 1021 under the control of the master control circuit 101 by setting the first switch module 1022, and can accurately output the electric quantity of the energy storage module 1021 to the load 105 in the case that the first switch module 1022 is closed, which is conducive to realizing the auxiliary discharge of the battery module 103.

[0063] In the optional embodiment, as an optional implementation manner, as shown in Figure 2 The energy storage module 1021 includes a super capacitor module 10211 and a first current detection unit 10212, wherein:

[0064] The first end of the super capacitor module 10211 is electrically connected to the first end of the first switch module 1022, the second end of the super capacitor module 10211 is electrically connected to the first end of the first current detection unit 10212, the controlled end of the super capacitor module 10211 is electrically connected to the control end of the main control circuit 101, and the second end of the first current detection unit 10212 is electrically connected to the negative electrode of the battery module 103, and the first current detection unit 10212 is in communication connection with the main control module through a wireless communication network.

[0065] Optionally, the super capacitor module 10211 can be a module composed of a plurality of super capacitors in series, a module composed of a plurality of super capacitors in parallel, or a module composed of a plurality of super capacitors in mixed connection (a plurality of super capacitors are first connected in series and then connected in parallel, or a plurality of super capacitors are first connected in parallel and then connected in series). For example, the super capacitor module 10211 is composed of seven super capacitors in series, and the energy storage related data of the super capacitor module 10211 can be, for example, a capacitor series internal resistance of 105 mΩ, a single capacitor maximum voltage of 2.7 V, a maximum discharge current of 54 A, and a maximum temperature of 70°C. Optionally, the first current detection unit 10212 can include a shunt resistor, a current detection amplifier, or other components or modules that can perform the same current detection function. Optionally, the capacitor current data detected by the first current detection unit 10212 can include the total current of the super capacitor module 10211, and can also include the current of each branch in which the super capacitor is located, and the present application embodiment is not limited.

[0066] In this optional embodiment, the main control circuit 101 controls the state of the energy storage control circuit 102 according to the received battery data of the battery module 103 and the energy storage related data of the energy storage control circuit 102, which can include:

[0067] The main control circuit 101 determines whether the current condition of the energy storage control circuit 102 meets the preset switch opening condition according to the received capacitor current data of the energy storage control circuit 102.

[0068] When it is determined that the current condition of the energy storage control circuit 102 meets the switch opening condition, the main control circuit 101 controls the energy storage control circuit 102 to be in the open state.

[0069] Specifically, the main control circuit 101 determines whether the current of any branch in which the super capacitor is located is greater than a preset current, such as 50 A. If so, the first switch module 1022 included in the energy storage control circuit 102 is controlled to be opened, so that the energy storage control circuit 102 is in the open state.

[0070] It can be seen that the optional embodiment can realize auxiliary discharge of the battery module 103 by setting the super capacitor module 10211 as an energy storage module, and can improve the current detection accuracy of the super capacitor module 10211 by setting the first current detection unit 10212 for current detection of the super capacitor branch, thereby facilitating the accurate control of the first switch module 1022 by the main control circuit 101 according to the current data of the super capacitor module 10211.

[0071] In the optional embodiment, as shown in Figure 2 The energy storage control circuit 102 further includes an equalization control module 1023, wherein:

[0072] The first input end of the equalization control module 1023 is electrically connected to the third end of the first current detection unit 10212, the second input end of the equalization control module 1023 is electrically connected to the third end of the super capacitor module 10211, and the output end of the equalization control module 1023 is electrically connected to the fourth end of the super capacitor module 10211.

[0073] The equalization control module 1023 is configured to monitor the voltage of the super capacitor module 10211 and the current of the super capacitor module 10211 sent by the first current detection unit 10212, and perform equalization control operation on each capacitor included in the super capacitor module 10211 according to the voltage and the current of the super capacitor module 10211.

[0074] Further optionally, a communication interface is arranged between the equalization control module 1023 and the main control circuit 101, configured to send the voltage and the current of the super capacitor module 10211 to the main control circuit 101, and configured to send the equalization control instruction from the main control circuit 101 to the equalization control module 1023, so as to realize the control of the equalization control module 1023 on the equalization control operation on each capacitor included in the super capacitor module 10211 by the main control circuit 101. The communication interface arranged between the main control circuit 101 and the equalization control module 1023 is configured to receive the voltage / current / equalization state of the capacitor detected by the equalization control module 1023 by the main control circuit 101, and to actively issue the equalization control (start / stop) instruction to the equalization control module 1023 by the main control circuit 101.

[0075] Specifically, the equalization control module 1023 includes a first AFE (Analog Front-End, analog front end) chip, wherein:

[0076] The third end of the first current detection unit 10212 is electrically connected to the first input end of the first AFE chip, the third end of the super capacitor module 10211 is electrically connected to the second input end of the first AFE chip, the fourth end of the super capacitor module 10211 is electrically connected to the output end of the first AFE chip, and the communication interface of the first AFE chip is in communication connection with the communication interface of the main control circuit 101. The first AFE chip is used for monitoring at least one of the voltage of the super capacitor, the current of the branch where the super capacitor is located, and the temperature of the super capacitor, as the energy storage related data of the energy storage control circuit 102, and is also used for the balancing function between the super capacitors in series. The first AFE chip is selected as TI-BQ76907 (in this way, the cost can be saved and the working voltage can be considered), and the minimum working voltage of the first AFE chip is 6V. Optionally, the capacitor voltage data of the super capacitor monitored by the first AFE chip can include the total voltage of the super capacitor module 10211, and can also include the voltage of each super capacitor. The capacitor temperature data monitored by the first AFE chip can include the temperature of the environment where the super capacitor module 10211 is located. The balancing control instruction can include a start balancing instruction or a stop balancing instruction, which is not limited in the embodiment of the application.

[0077] In the optional embodiment, during the working period of the main control circuit 101 and when the first switch module 1022 is in the off state, if the maximum capacitor cell voltage at this time remains greater than or equal to Vmax (2.2V) and lasts for more than 30s (the normal average voltage is 2.0V), the highest capacitor cell voltage is marked as the voltage that needs to be balanced; at this time, the balancing current I (for example, designed as 5mA on average) is obtained, and the balancing requirement of the highest capacitor cell voltage is determined as a decrease of 0.2V; according to the capacitor capacity (the capacitor is used as a discharge battery, and the capacity can be represented by the discharge current multiplied by the discharge time, for example, the discharge current is 9A and the discharge time is 1.5s), the wake-up requirement balancing time T can be calculated as T = 9A * 1.5s / 5mA = 450s = 7.5min; when the balancing time is marked, the main control circuit 101 issues a start balancing instruction to the first AFE chip during the working period and the off period of the first switch module 1022.

[0078] It should be noted that the balancing process needs to meet the following conditions: the voltage range of the balanced capacitor cell is 1.7V-2.8V, the temperature range of the capacitor cell is -20℃-45℃, the first switch module 1022 is off, the capacitor voltage and capacitor temperature collection are effective, and no balancing circuit fails; if any of the above conditions is not met, the balancing process is exited.

[0079] For example, when the first AFE chip has a communication failure (for example, when the capacitor voltage is lower than 6V, and AFE2 cannot communicate due to insufficient supply voltage), the processing manner of the main control circuit 101 specifically includes:

[0080] The main control circuit 101 determines whether the total voltage of the current battery cell is within the range of 9-14V, whether the overall PACK interface 104 is free of serious failure, and whether the battery cell temperature is within the interval of -20℃-50℃.

[0081] When it is determined that the above conditions are all met, the main control circuit 101 periodically turns on and off the first switch module 1022 (closed for 100ms, and opened for 30 seconds, and the cycle is 50 cycles), and pulse charges the capacitor. If the signal of AFE2 is re-identified during the cycle, the normal power compensation mode is executed.

[0082] In the optional embodiment, the main control circuit 101 controls the state of the energy storage control circuit 102 according to the received battery data of the battery module 103 and the energy storage related data of the energy storage control circuit 102, which can include:

[0083] The main control circuit 101 determines whether the current condition of the energy storage control circuit 102 meets the preset switch opening condition according to one of the received capacitor voltage data, capacitor temperature data and capacitor current data of the energy storage control circuit 102.

[0084] When it is determined that the current condition of the energy storage control circuit 102 meets the switch opening condition, the main control circuit 101 controls the energy storage control circuit 102 to be in an open state.

[0085] Specifically, the main control circuit 101 determines whether the highest voltage among the voltages of all supercapacitors is greater than a preset overcharge voltage (for example, 2.6V), which is recorded as a first opening condition; or,

[0086] The main control circuit 101 determines whether the total voltage of the supercapacitor module 10211 is greater than or equal to a preset full charge voltage, for example, whether the cumulative total voltage of 7 supercapacitors is greater than or equal to 13.95V, and whether the temperature of the environment where the supercapacitor module 10211 is located is greater than a first preset temperature, for example, -25℃ (the full charge voltage of the battery pack 107 used for charging the supercapacitor module 10211 is 14V; the supercapacitor is disconnected when full to avoid frequent charging and discharging of the supercapacitor module 10211), which is recorded as a second opening condition; or,

[0087] The main control circuit 101 determines whether the temperature of the environment where the supercapacitor module 10211 is located is greater than or equal to a second preset temperature, for example, 60℃ (when the temperature is greater than the second preset temperature, it indicates that the environment where the supercapacitor module 10211 is located is overheated), which is recorded as a third opening condition.

[0088] When one of the first disconnect condition, the second disconnect condition and the third disconnect condition is met, it is determined that the current condition of the energy storage control circuit 102 meets the preset switch disconnect condition.

[0089] In this alternative embodiment, the number of energy storage control circuits 102 is greater than or equal to 1, and each energy storage control circuit is connected in parallel with each other.

[0090] It should be noted that the present scheme sets overcharge protection and over-temperature protection, but does not set over-discharge protection, which can avoid the situation that the super capacitor cannot release energy due to the setting of over-discharge protection when the super capacitor needs to discharge.

[0091] It can be seen that the alternative embodiment can also accurately detect the energy storage related data of the super capacitor module 10211 by setting the balancing control module 1023, and can accurately realize the balancing control of the super capacitor module 10211 by controlling the balancing control module 1023 by the master control circuit 101, which is conducive to improving the performance and stability of the overall circuit. In addition, compared with the existing AFE chip directly powered by the super capacitor to control the super capacitor auxiliary discharge of the first switch module 1022, the present scheme can reduce the situation that the AFE chip cannot work and cannot control the first switch module 1022 due to the capacitor power loss, which is conducive to improving the control accuracy, reliability and stability of the switch corresponding to the super capacitor module 10211.

[0092] In another alternative embodiment, as shown in Figure 3 Figure 3 is another structure diagram of a control circuit for auxiliary discharging of a battery disclosed by the embodiment of the present application, wherein the control circuit for auxiliary discharging of the battery further comprises a pre-charging module 106, and the pre-charging module 106 comprises a second switch module 1061 and a voltage conversion module 1062, wherein:

[0093] The first end of the second switch module 1061 is electrically connected to the second end of the first switch module 1022 included in the energy storage control circuit 102, and is used to electrically connect the positive electrode of the battery module 103. The output end of the voltage conversion module 1062 is electrically connected to the second end of the first current detection unit 10212 included in the energy storage control circuit 102, and is used to electrically connect the negative electrode of the battery module 103. The input end of the voltage conversion module 1062 is electrically connected to the second end of the second switch module 1061. The power supply end of the voltage conversion module 1062 is used to electrically connect the preset battery pack 107.

[0094] ​The second switch module 1061 is configured to provide the voltage output by the battery module 103 to the energy storage control circuit 102 when the second switch module 1061 is in an open state, and / or provide the voltage output by the battery pack 107 to the energy storage control circuit 102 through the voltage conversion module 1062 when the second switch module 1061 is in a closed state.

[0095] Optionally, the voltage conversion module 1062 can be a direct-current voltage conversion device (such as a DC / DC converter), or an alternating-current voltage conversion device. The battery pack 107 can be a high-voltage battery pack 107, and in this case, the voltage conversion module 1062 is a DC / DC converter configured to convert the high voltage output by the high-voltage battery pack 107 into a low voltage used as a charging voltage of the supercapacitor module 10211. The embodiments of the present application are not limited in this regard.

[0096] As can be seen, the optional embodiment can set a charging mode based on the second switch module 1061, and when the second switch module 1061 is open, the battery module 103 can be used to charge the supercapacitor in the energy storage control circuit 102, and when the second switch module 1061 is closed, the external battery pack 107 can be used to charge the supercapacitor, which can improve the diversity and flexibility of the charging mode of the supercapacitor, and can reduce the discharge pressure of the battery module 103 by charging the supercapacitor through the battery pack 107 when the battery module 103 discharges the load 105, and to some extent, can improve the discharge performance of the battery module.

[0097] In this optional embodiment, as an optional implementation, as shown in Figure 3 The control circuit for assisting the discharge of the battery further includes the battery module 103, and the battery module 103 includes the cell module 1031 and the second current detection unit 1032, wherein:

[0098] The positive electrode of the cell module 1031 is electrically connected to the second end of the first switch module 1022 and the second end of the second switch module 1061, the negative electrode of the cell module 1031 is electrically connected to the first end of the second current detection unit 1032, the second end of the second current detection unit 1032 is electrically connected to the output end of the voltage conversion module 1062 and the second end of the first current detection unit 10212, and the second current detection unit 1032 is in communication connection with the master control module through a wireless communication network;

[0099] The second current detection unit 1032 is configured to detect the current of the cell module 1031, and send the current of the cell module 1031 to the master control module, so that the master control module calculates the state of charge of the cell module 1031 according to the current of the cell module 1031, and determines the current of the cell module 1031 and the state of charge of the cell module 1031 as the battery data of the battery module 103.

[0100] Further, as shown in Figure 3 The control circuit for assisting discharging of the battery further includes a second AFE chip, which is electrically connected to the third end of the battery cell module 1031 and in communication connection with the main control circuit 101. The second AFE chip is configured to detect the battery voltage of the battery cell module 1031 and / or the battery temperature of the battery cell module 1031 as the battery data of the battery module 103.

[0101] Specifically, the main control circuit 101 controls the state of the energy storage control circuit 102 according to the received battery data of the battery module 103 and the energy storage related data of the energy storage control circuit 102, including:

[0102] The main control circuit 101 determines whether the current condition of the energy storage control circuit 102 meets the preset closing condition of the switch according to one of the received capacitor voltage data, capacitor temperature data of the energy storage control circuit 102 and battery data of the battery module 103.

[0103] When it is determined that the current condition of the energy storage control circuit 102 meets the closing condition of the switch, the main control circuit 101 controls the energy storage control circuit 102 to be in a closed state.

[0104] For example, the main control circuit 101 determines whether the cumulative total voltage (e.g., 13V) of the super capacitor module 10211 is less than the preset power compensation voltage and the battery pack 107 is in a normal working state (since the normal self-consumption power of the capacitor is used for power compensation of the capacitor branch, the trigger occurs once in about 13 hours), which is recorded as a first closing condition; or,

[0105] The main control circuit 101 determines whether the battery temperature of the battery cell module 1031 is lower than a third preset temperature (e.g., -25℃) and whether the maximum capacitor voltage is less than a preset overvoltage (e.g., 2.7V), which is recorded as a second closing condition; or,

[0106] The main control circuit 101 determines whether the battery pack 107 is ready to enter a sleep state (when the battery pack 107 is in a sleep state, the capacitor voltage cannot be monitored and the capacitor power compensation is not allowed, which can avoid damage of the capacitor due to overvoltage), which is recorded as a third closing condition.

[0107] When one of the first closing condition, the second closing condition and the third closing condition is met, it is determined that the current condition of the energy storage control circuit 102 meets the closing condition of the switch.

[0108] The calculation method of the power compensation interval in the first closing condition is as follows:

[0109] The self-consumption current of the capacitor is calculated as 0.3mA;

[0110] The capacity of the capacitor itself is C = I * (t2-t1) / (U1-U2);

[0111] It can be obtained: 14.28F = 0.0003A *△t / (14V-13V);

[0112] It can be obtained by reverse calculation: the interval△t = 14.28F *1V / 0.0003A = 50000 seconds = 13.22 hours.

[0113] When the second closing condition is used for judgment, if the battery temperature is lower than the third preset temperature and the maximum capacitance voltage is greater than the preset overvoltage, the first switch module 1022 is not closed, so that when the battery is discharged at low temperature, as long as overvoltage does not occur, the capacitor branch can be connected to the battery module for a long time to improve the performance of the battery module at low temperature.

[0114] It can be seen that the optional embodiment can detect the current data of the battery module by setting the second current detection unit 1032, which can improve the diversity and richness of the data received by the main control circuit 101, thereby facilitating to improve the state control accuracy and reliability of the main control circuit 101 to the energy storage control circuit 102 based on more abundant data.

[0115] For example, as shown in FIG. 1, Figure 4 , Figure 4 is a schematic diagram of a control circuit for assisting the discharge of a battery, wherein the control circuit for assisting the discharge of the battery is provided with a wireless communication network (i.e. a Low Power Network in FIG. 1), the positive electrode (i.e. BAT+ in FIG. 1) of the battery cell module 1031 is electrically connected to the first end of the first switch module 1022 (i.e. CB2 in FIG. 1) and the first end of the first switch module 1022 (i.e. CB1 in FIG. 1), the negative electrode (i.e. BAT- in FIG. 1) of the battery cell module 1031 is electrically connected to the first end of the second current detection unit 1032 (i.e. Shunt-A in FIG. 1), and the third end of the battery cell module 1031 is electrically connected to the second AFE chip (i.e. AFE module A in FIG. 1), the second end of the first switch module 1022 is electrically connected to the positive electrode of the super capacitor module 10211, the negative electrode of the super capacitor module 10211 is electrically connected to the first end of the first current detection unit 10212 (i.e. Shunt-B in FIG. 1), and the controlled end of the super capacitor module 10211 is electrically connected to the control end (i.e. the control end of the MCU in FIG. 1) of the main control circuit 101 (i.e. the MCU in FIG. 1). Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 the control end of the MCU in FIG. 1).​​​​​​​​Figure 4 The second end of the second switch module 1061 is electrically connected to the input end of the voltage conversion module 1062 (i.e. DC / DC in Figure 4 The output end of the voltage conversion module 1062 is electrically connected to the second end of the first current detection unit 10212 and the second end of the second current detection unit 1032. The third end of the first current detection unit 10212 is electrically connected to the first input end of the equalization control module 1023 (i.e. AFE module B in Figure 1-4 The second input end of the equalization control module 1023 is electrically connected to the third end of the super capacitor module 10211. The output end of the equalization control module 1023 is electrically connected to the fourth end of the super capacitor module 10211. The power supply end of the voltage conversion module 1062 is used to electrically connect to the preset battery pack 107 (i.e. high-voltage battery pack in Figure 5 The second AFE chip and the equalization control module 1023 are both in communication connection with the master control circuit 101 through a wireless communication network. It should be noted that the energy storage control circuit 102 composed of the super capacitor module 10211, the first switch module 1022, the first current detection unit 10212 and the equalization control module 1023 can be arranged on the extension board corresponding to the battery module 103, and the extension board is provided with a PACK interface 104. The positive electrode of the PACK interface 104 is marked as KL30, and the negative electrode of the PACK interface 104 is marked as KL31.

[0116] In combination with Figure 5 , the working principle of the control circuit for auxiliary discharging of the battery in the present application is described in detail as follows:

[0117] In the embodiment of the present application, when the battery cell module 1031 in the battery module 103 discharges the load 105, the master control circuit 101 determines whether the current condition of the energy storage control circuit 102 meets the preset switch opening condition according to one of the received capacitor voltage data and capacitor temperature data of the super capacitor module 10211 in the energy storage control circuit 102 sent by the equalization control module 1023 and the capacitor current data of the super capacitor module 10211 sent by the first current detection unit 10212 in the energy storage control circuit 102; when it is determined that the current condition of the energy storage control circuit 102 meets the switch opening condition, that is, the energy storage control circuit 102 does not need to assist in discharging the load 105 during the discharging process of the battery cell module 1031, the master control circuit 101 controls the first switch module 1022 in the energy storage control circuit 102 to be opened, so that the super capacitor module 10211 in the energy storage control circuit 102 does not discharge the load 105 (such as an electric vehicle); and / or, the master control circuit 101 determines whether the current condition of the energy storage control circuit 102 meets the preset switch closing condition according to one of the received capacitor voltage data and capacitor temperature data of the energy storage control circuit 102 and the battery data of the battery cell module 1031 sent by the second current detection unit 1032 corresponding to the battery cell module 1031; when it is determined that the current condition of the energy storage control circuit 102 meets the switch closing condition, that is, the energy storage control circuit 102 needs to assist in discharging the load 105 during the discharging process of the battery cell module 1031, the master control circuit 101 controls the first switch module 1022 in the energy storage control circuit 102 to be closed, so that the super capacitor module 10211 in the energy storage control circuit 102 assists the battery cell module 1031 in discharging the load 105; in addition, when the maximum super capacitor single cell voltage exceeds the average voltage, the master control circuit 101 has equalization demand for the super capacitor, the master control circuit 101 calculates the required equalization time according to the predetermined equalization current and the capacity of the super capacitor, and issues an equalization start instruction to the equalization control module 1023, controls the equalization control module 1023 to perform equalization control on the super capacitor module 10211 within the equalization time, and the equalization process needs to meet the following conditions: the voltage range of the equalized capacitor single cell is 1.7V-2.8V, the temperature range of the capacitor single cell is -20℃-45℃, the first switch module 1022 is opened, the capacitor voltage and capacitor temperature collection are effective, and no equalization circuit fails, if any of the above conditions is not met, the equalization process is exited, the energy of the energy storage control circuit 102 can be output to the load 105 under the control of the master control circuit 101, the auxiliary discharge of the battery module 103 can be accurately realized, the use demand of the load 105 for sudden large current discharge can be met, and the battery discharge performance can be improved.

[0118] Embodiment two

[0119] Please refer to Figure 5 , Figure 5 is a flowchart of a control method for auxiliary discharging of a battery. Wherein, Figure 5 The control method for auxiliary discharging of a battery described can be applied to an electronic product (such as an electric vehicle) provided with a control circuit for auxiliary discharging of a battery, wherein the control circuit for auxiliary discharging of a battery includes a master control circuit and an energy storage control circuit, wherein a first end of the energy storage control circuit is used to electrically connect a positive electrode of a battery module, a second end of the energy storage control circuit is used to electrically connect a negative electrode of the battery module, the energy storage control circuit and the battery module are both in communication connection with a master control module through a wireless communication network, a control end of the master control circuit is electrically connected to a controlled end of the energy storage control circuit, and the energy storage control circuit is provided with a PACK interface for electrically connecting a load; as Figure 6 The control method for auxiliary discharging of a battery can include the following operations:

[0120] 201. When the battery module discharges the load, the master control circuit controls the state of the energy storage control circuit according to the received battery data of the battery module and the energy storage related data of the energy storage control circuit.

[0121] 202. Under the control of the master control circuit, the energy storage control circuit outputs the energy of the energy storage control circuit to the load to achieve auxiliary discharging of the battery module.

[0122] It should be noted that other related descriptions of the above control of auxiliary discharging of a battery are described in other descriptions of the control of auxiliary discharging of a battery of Embodiment One, which will not be repeated here.

[0123] It can be seen that the implementation Figure 6 The control method for auxiliary discharging of a battery described can accurately achieve auxiliary discharging of the battery module by setting the energy storage control circuit, outputting the energy of the energy storage control circuit to the load under the control of the master control circuit when the battery module discharges the load, to meet the use demand of sudden large current discharge of the load, and is beneficial to improve the battery discharge performance

[0124] In an optional embodiment, the energy storage related data includes one or more combinations of capacitor voltage data, capacitor temperature data, and capacitor current data. And the master control circuit controls the state of the energy storage control circuit according to the received battery data of the battery module and the energy storage related data of the energy storage control circuit can include:

[0125] The master control circuit determines whether the current condition of the energy storage control circuit meets the preset switch opening condition according to one of the received capacitor voltage data, capacitor temperature data, and capacitor current data of the energy storage control circuit;

[0126] When it is judged that the current condition of the energy storage control circuit meets the switch opening condition, the main control circuit controls the energy storage control circuit to be in the open state; and / or,

[0127] The main control circuit judges whether the current condition of the energy storage control circuit meets the preset switch closing condition according to one of the received capacitor voltage data, capacitor temperature data and battery data of the battery module of the energy storage control circuit;

[0128] When it is judged that the current condition of the energy storage control circuit meets the switch closing condition, the main control circuit controls the energy storage control circuit to be in the closed state.

[0129] It can be seen that the optional embodiment can set the switch closing process, quickly and accurately judge whether the energy storage control circuit has the demand of auxiliary discharge in the process of discharging the battery module to the load by the main control circuit according to diversified capacitor related data, and when the judgment result is yes, the energy storage control circuit is closed by the main control circuit to realize the output of the energy of the energy storage control circuit to the load, which can accurately realize the auxiliary discharge of the energy storage control circuit; and by setting the switch opening process, it is quickly and accurately judged by the main control circuit whether the energy storage control circuit needs to stop the operation of auxiliary discharge, and when the judgment result is yes, the energy storage control circuit is opened by the main control circuit, which is beneficial to improve the control accuracy and reliability of the main control circuit to the energy storage control circuit by the control process of the energy storage control circuit in multiple states.

[0130] Embodiment three

[0131] Please refer to Figure 6 , Figure 6 is a structural schematic diagram of a control device disclosed by the embodiment of the application. Wherein, ​ The control device described is an electronic product provided with a control circuit capable of assisting the discharge of a battery, and the control device comprises a device body, and further comprises the control circuit for assisting the discharge of the battery as in embodiment one, and the control device is used to implement the control circuit for assisting the discharge of the battery in embodiment two. It should be noted that the detailed description of the control circuit for assisting the discharge of the battery is described in the embodiment one, and the specific description of the related content is not repeated in the embodiment of the application.

[0132] It can be seen that the embodiment ​ The control device described can set the energy storage control circuit, output the energy of the energy storage control circuit to the load under the control of the main control circuit when the battery module discharges to the load, and accurately realize the auxiliary discharge of the battery module to meet the use demand of the load burst large current discharge, which is beneficial to improve the battery discharge performance.

[0133] It should be noted that the circuit, method and electronic device for voltage calibration of a power amplifier disclosed in the embodiments of the present application are only the preferred embodiments of the present application, and are used to illustrate the technical solutions of the present application, but not to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent ones; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A control circuit for assisting discharge of a battery, characterized by comprising: The circuit comprises a master control circuit (101) and an energy storage control circuit (102), and the energy storage control circuit (102) comprises an energy storage module (1021) and a first switch module (1022), wherein: The first end of the energy storage module (1021) is electrically connected to the first end of the first switch module (1022), the second end of the first switch module (1022) is used for electrically connecting the positive electrode of the battery module (103), the third end of the first switch module (1022) is electrically connected to the control end of the master control circuit (101), the second end of the energy storage module (1021) is used for electrically connecting the negative electrode of the battery module (103), the control end of the energy storage module (1021) is electrically connected to the control end of the master control circuit (101), and the energy storage module (1021) and the battery module (103) are both connected in communication with the master control module through the wireless communication network, and the energy storage control circuit (102) is provided with a PACK interface (104) for electrically connecting a load (105); The master control circuit (101) is used for, when the battery module (103) discharges the load (105), controlling the state of the energy storage control circuit (102) according to the received battery data of the battery module (103) and the energy storage related data of the energy storage control circuit (102); The energy storage control circuit (102) is used for, under the control of the master control circuit (101), controlling the state of the first switch module (1022), and when the first switch module (1022) is in a closed state, outputting the electric quantity of the energy storage module (1021) to the load to realize auxiliary discharge of the battery module (103).

2. The control circuit for assisting discharge of a battery according to claim 1, wherein The energy storage module (1021) comprises a super capacitor module (10211) and a first current detection unit (10212), wherein: The first end of the super capacitor module (10211) is electrically connected to the first end of the first switch module (1022), the second end of the super capacitor module (10211) is electrically connected to the first end of the first current detection unit (10212), the control end of the super capacitor module (10211) is electrically connected to the control end of the master control circuit (101), the second end of the first current detection unit (10212) is used for electrically connecting the negative electrode of the battery module (103), and the first current detection unit (10212) is connected in communication with the master control module through the wireless communication network.

3. The control circuit for assisting discharge of a battery according to claim 2, wherein The energy storage control circuit (102) further comprises an equalization control module (1023), wherein: The first input end of the equalization control module (1023) is electrically connected to the third end of the first current detection unit (10212), the second input end of the equalization control module (1023) is electrically connected to the third end of the super capacitor module (10211), and the output end of the equalization control module (1023) is electrically connected to the fourth end of the super capacitor module (10211). The equalization control module (1023) is configured to monitor the voltage of the super capacitor module (10211) and the current of the super capacitor module (10211) sent by the first current detection unit (10212), and perform equalization control operation on each capacitor included in the super capacitor module (10211) according to the voltage and the current of the super capacitor module (10211).

4. The control circuit for assisting discharge of a battery according to claim 3, wherein The equalization control module (1023) is configured to send the voltage and the current of the super capacitor module (10211) to the master control circuit (101), and send the equalization control instruction from the master control circuit (101) to the equalization control module (1023), so that the master control circuit (101) controls the equalization control module (1023) to perform equalization control operation on each capacitor included in the super capacitor module (10211).

5. The control circuit for assisting discharge of a battery according to claim 4, wherein The equalization control module (1023) comprises a first AFE chip. The first input end of the first AFE chip is electrically connected to the third end of the first current detection unit (10212), the second input end of the first AFE chip is electrically connected to the third end of the super capacitor module (10211), the output end of the first AFE chip is electrically connected to the fourth end of the super capacitor module (10211), and the communication interface of the first AFE chip is in communication connection with the communication interface of the master control circuit (101).

6. The control circuit for assisting discharge of a battery according to any one of claims 1 to 5, characterized by, The number of the energy storage control circuits (102) is greater than or equal to 1, and each of the energy storage control circuits (102) is in parallel connection with each other.

7. The control circuit for assisting discharge of a battery according to any one of claims 1 to 5, characterized by, The circuit further comprises a pre-charging module (106), and the pre-charging module (106) comprises a second switch module (1061) and a voltage conversion module (1062). The first end of the second switch module (1061) is electrically connected to the second end of the first switch module (1022) included in the energy storage control circuit (102) and is configured to be electrically connected to the positive electrode of the battery module (103), the output end of the voltage conversion module (1062) is electrically connected to the second end of the first current detection unit (10212) included in the energy storage control circuit (102) and is configured to be electrically connected to the negative electrode of the battery module (103), the input end of the voltage conversion module (1062) is electrically connected to the second end of the second switch module (1061), and the power supply end of the voltage conversion module (1062) is configured to be electrically connected to a preset battery pack (107). The second switch module (1061) is configured to provide the voltage output by the battery module (103) to the energy storage control circuit (102) when the second switch module (1061) is in an open state, and / or provide the voltage output by the battery pack (107) to the energy storage control circuit (102) through the voltage conversion module (1062) when the second switch module (1061) is in a closed state.

8. The control circuit for assisting discharge of a battery according to claim 7, wherein The circuit further comprises the battery module (103), and the battery module (103) comprises a battery cell module (1031) and a second current detection unit (1032), wherein: The positive electrode of the battery cell module (1031) is electrically connected to the second end of the first switch module (1022) and the second end of the second switch module (1061), the negative electrode of the battery cell module (1031) is electrically connected to the first end of the second current detection unit (1032), the second end of the second current detection unit (1032) is electrically connected to the output end of the voltage conversion module (1062) and the second end of the first current detection unit (10212), and the second current detection unit (1032) is in communication connection with the master control module through the wireless communication network; The second current detection unit (1032) is configured to detect the current of the battery cell module (1031) and send the current of the battery cell module (1031) to the master control module, so that the master control module calculates the state of charge of the battery cell module (1031) according to the current of the battery cell module (1031), and determines the current of the battery cell module (1031) and the state of charge of the battery cell module (1031) as the battery data of the battery module (103).

9. The control circuit for assisting discharge of a battery according to claim 8, wherein The circuit further comprises a second AFE chip, the second AFE chip is electrically connected to the third end of the battery cell module (1031), and the second AFE chip is in communication connection with the master control circuit (101), wherein: The second AFE chip is configured to detect the battery voltage of the battery cell module (1031) and / or the battery temperature of the battery cell module (1031) as the battery data of the battery module (103).

10. A control device comprising a device body, characterized by The control device further comprises the control circuit for assisting the discharge of the battery according to any one of claims 1-9. The control device further comprises the control circuit for assisting the discharge of the battery according to any one of claims 1-9.

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