Control circuit, method and equipment for carrying out auxiliary discharge on battery

Abstract

The invention relates to the technical field of batteries, and discloses a control circuit, a method and a control device for auxiliary discharge of a battery, and the control circuit comprises an energy storage control circuit, a first end, a second end, a third end and a fourth end, 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 batteries, and particularly to a control circuit, a method, and a control device for assisting the discharge of a battery. Background Art

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

[0003] However, it is found in practice that although the discharge performance of lithium batteries at low temperatures is improved compared with lead-acid batteries, in response to the demand for sudden large-current discharge, limited by the existing lithium battery capacity, the existing lithium battery discharge scheme cannot support large-current instantaneous discharge, resulting in the inability to meet the usage requirements of large-current discharge, that is: the sudden large-current discharge ability of the existing lithium battery discharge scheme is low. Therefore, it is particularly important to propose a new battery discharge scheme to improve the discharge performance of the battery at low temperatures. Summary of the Invention

[0004] The present application provides a control circuit, a method, and a control device for assisting the discharge of a battery, which can meet the usage requirements of large-current discharge and is beneficial to improving the battery discharge performance.

[0005] To solve the above technical problems, in the first aspect of the present application, a control circuit for assisting the discharge of a battery is disclosed. The circuit includes 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 to the positive electrode of the battery module, the second end of the energy storage control circuit is used for electrically connecting to the negative electrode of the battery module, both the energy storage control circuit and the battery module are communicatively connected to the main control module through a wireless communication network, the control end of the main control circuit is electrically connected to the controlled end of the energy storage control circuit, and the energy storage control circuit is provided with a PACK interface for electrically connecting to a load;

[0007] The main control circuit is configured to control 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 to the load;

[0008] The energy storage control circuit is configured to output the electric quantity of the energy storage control circuit to the load under the control of the main control circuit to achieve auxiliary discharge of the battery module.

[0009] As an alternative implementation, in the first aspect of the present application, the energy storage control circuit includes an energy storage module and a first switch module, where:

[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 for electrically connecting to the positive electrode of the battery module. The third end of the first switch module is electrically connected to the control end of the main control circuit. The second end of the energy storage module is for electrically connecting to the negative electrode of the battery module. The controlled end of the energy storage module is electrically connected to the control end of the main control circuit, and the energy storage module is communicatively connected to the main control module through the wireless communication network;

[0011] The first switch module is used to control the state of the first switch module under the control of the main control circuit; and when the first switch module is in the closed state, output the power of the energy storage module to the load to achieve auxiliary discharge of the battery module.

[0012] As an alternative implementation, in the first aspect of the present application, the energy storage module includes a supercapacitor module and a first current detection unit, where:

[0013] The first end of the supercapacitor module is electrically connected to the first end of the first switch module. The second end of the supercapacitor module is electrically connected to the first end of the first current detection unit. The controlled end of the supercapacitor module is electrically connected to the control end of the main control circuit. The second end of the first current detection unit is for electrically connecting to the negative electrode of the battery module, and the first current detection unit is communicatively connected to the main control module through the wireless communication network.

[0014] As an alternative implementation, in the first aspect of the present application, the energy storage control circuit further includes an equalization control module, where:

[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 supercapacitor module. The output end of the equalization control module is electrically connected to the fourth end of the supercapacitor module;

[0016] The equalization control module is used to monitor the voltage of the supercapacitor module and the current of the supercapacitor module sent by the first current detection unit; and perform an equalization control operation on each capacitor included in the supercapacitor module according to the voltage and current of the supercapacitor module.

[0017] As an alternative implementation, in the first aspect of the present application, a communication interface is provided between the balancing control module and the main control circuit, which is used to send the voltage and current of the supercapacitor module to the main control circuit, and is also used to send the balancing control instruction from the main control circuit to the balancing control module, so as to enable the main control circuit to control the balancing control module to perform a balancing control operation on each of the capacitors included in the supercapacitor module.

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

[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 to be electrically connected to 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 to be electrically connected to 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, and the power supply end of the voltage conversion module is used to be electrically connected to a preset battery pack;

[0020] The second switch module is used to supply the voltage output by the battery module to the energy storage control circuit when the second switch module is in the off state; and / or, when the second switch module is in the on state, supply the voltage output by the battery pack to the energy storage control circuit through the voltage conversion module.

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

[0022] The positive electrode of the battery 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 battery 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 main control module through the wireless communication network;

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

[0024] The second aspect of the present application discloses a control method for auxiliary discharge of a battery. The method is applied to a control circuit for auxiliary discharge of a battery, and the circuit includes a main control circuit and an energy storage control circuit. Among them, the first end of the energy storage control circuit is used to be electrically connected to the positive electrode of the battery module, the second end of the energy storage control circuit is used to be electrically connected to the negative electrode of the battery module, both the energy storage control circuit and the battery module are communicatively connected to the main control module through a wireless communication network, the control end of the main control circuit is electrically connected to 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 includes:

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

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

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

[0028] And, the main control circuit controls the state of the energy storage control circuit according to the battery data of the battery module and the energy storage related data of the energy storage control circuit received, including:

[0029] The main control circuit judges whether the current condition of the energy storage control circuit meets a preset switch-off condition according to one of the capacitor voltage data, capacitor temperature data, and capacitor current data of the energy storage control circuit received;

[0030] When it is judged that the current condition of the energy storage control circuit meets the switch-off condition, the main control circuit controls the energy storage control circuit to be in an off state; and / or,

[0031] The main control circuit judges whether the current condition of the energy storage control circuit meets a preset switch-on condition according to one of the capacitor voltage data, capacitor temperature data of the energy storage control circuit, and the battery data of the battery module received;

[0032] When it is judged that the current condition of the energy storage control circuit meets the switch-on condition, the main control circuit controls the energy storage control circuit to be in an on state.

[0033] The third aspect of the present application discloses a control device, which includes a device body, and the control device further includes a control circuit for assisting the battery to discharge as disclosed in the first aspect of the present application.

[0034] Implementing the present application has the following beneficial effects:

[0035] In the present application, a control circuit for assisting the battery to discharge is provided. The control circuit for assisting the battery to discharge includes a main control circuit and an energy storage control circuit. Among them, the first end of the energy storage control circuit is used for electrically connecting to the positive electrode of the battery module, the second end of the energy storage control circuit is used for electrically connecting to the negative electrode of the battery module, both the energy storage control circuit and the battery module are communicatively connected to the main control module through a wireless communication network, the control end of the main control circuit is electrically connected to the controlled end of the energy storage control circuit, and the energy storage control circuit is provided with a PACK interface for electrically connecting to a load; 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 to the load; 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 to realize the auxiliary discharge of the battery module. It can be seen that the present application can accurately realize the auxiliary discharge of the battery module by setting the energy storage control circuit, and output the electric quantity 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 meet the use requirements of the load for sudden large-current discharge, which is beneficial to improving the battery discharge performance. Description of the Drawings

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0037] Figure 1 is a schematic structural diagram of a control circuit for assisting the battery to discharge disclosed in an embodiment of the present application;

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

[0039] Figure 3 is a schematic structural diagram of another control circuit for assisting the battery to discharge disclosed in an embodiment of the present application;

[0040] Figure 4It is a schematic structural diagram of a control circuit for auxiliary discharge of a battery disclosed in an embodiment of the present application;

[0041] Figure 5 It is a schematic flowchart of a control method for auxiliary discharge of a battery disclosed in an embodiment of the present application;

[0042] Figure 6 It is a schematic structural diagram of a control device disclosed in an embodiment of the present application. Detailed implementation manners

[0043] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0044] It should be noted that unless otherwise clearly specified and limited, the term "electrically connected" in the specification and claims of the present application and the above-mentioned drawings should be understood in a broad sense. For example, it may be a fixed electrical connection, a detachable electrical connection, or an integral electrical connection; it may be a mechanical electrical connection, an electrical electrical connection or may communicate with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the connection inside two components or the interaction relationship between two components.

[0045] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product or terminal comprising a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or terminals.

[0046] Referring to "embodiment" in this article means that a specific feature, structure or characteristic described in combination with the embodiment may be included in at least one embodiment of the present application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0047] The present application discloses a control circuit, method and control device for assisting the discharge of a battery. By setting an energy storage control circuit, when the battery module discharges to a load, the power of the energy storage control circuit can be output to the load under the control of the main control circuit, which can accurately achieve the auxiliary discharge of the battery module to meet the usage requirements of the load for sudden large-current discharge and is beneficial to improving the battery discharge performance. The following will be described in detail respectively.

[0048] Embodiment 1

[0049] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a control circuit for assisting the discharge of a battery disclosed in an embodiment of the present application. Among them, Figure 1 the described control circuit for assisting the discharge of a battery can be applied to any electronic product (such as an electric vehicle) that needs to assist the discharge of a battery, and the embodiments of the present application do not make any limitations. As Figure 1 shown, the control circuit for assisting the discharge of a battery includes a main control circuit 101 and an energy storage control circuit 102, where:

[0050] The first end of the energy storage control circuit 102 is used for electrically connecting to the positive electrode of the battery module 103 (i.e., Figure 1 BAT+ shown), and the second end of the energy storage control circuit 102 is used for electrically connecting to the negative electrode of the battery module 103 (i.e., Figure 1 BAT- shown). Both the energy storage control circuit 102 and the battery module 103 are communicatively connected to the main control module through a wireless communication network. The control end of the main control circuit 101 is electrically connected to the controlled end of the energy storage control circuit 102. The energy storage control circuit 102 is provided with a PACK interface 104 for electrically connecting to the load 105;

[0051] The main control circuit 101 is used for 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 when the battery module 103 discharges to the load 105;

[0052] The energy storage control circuit 102 is used for outputting the power of the energy storage control circuit 102 to the load 105 under the control of the main control circuit 101 to achieve the auxiliary discharge of the battery module 103.

[0053] Among them, the energy storage control circuit 102 can be arranged on the expansion board of the battery module 103. Optionally, the battery data may include one or more combinations of battery voltage, battery temperature, current in the branch where the battery is located, and the number of batteries. Optionally, the energy storage related data may include capacitance data of the supercapacitor module 10211 included in the energy storage control circuit 102. Among them, the capacitance data of the supercapacitor module 10211 may include one or more combinations of the number of capacitors, the voltage of the corresponding capacitor, the temperature of the corresponding capacitor, and the current in the branch where the corresponding capacitor is located.

[0054] Specifically, when the battery data of the battery module 103 indicates that the battery module 103 discharges to the load 105 (such as an electric vehicle), the main control circuit 101 determines whether it is necessary to use the energy storage control circuit 102 to assist the battery module 103 in discharging according to the energy storage related data of the energy storage control circuit 102; when the judgment result is yes, the energy storage control circuit 102 is turned on, so that the energy storage control circuit 102 outputs the power of the energy storage control circuit 102 to the load 105 under the on control of the main control circuit 101, thereby realizing the auxiliary discharge of the battery module 103.

[0055] Optionally, the main control circuit 101 includes a control chip and its peripheral circuits. Among them, the control chip may be an MCU (Microcontroller Unit), a Soc (System on Chip), or other chips that can play an equivalent control role. The embodiments of the present application do not make limitations.

[0056] It can be seen that implementing Figure 1 the described control circuit for auxiliary discharge of the battery can, by setting the energy storage control circuit 102, output the power 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 to the load 105, and can accurately realize the auxiliary discharge of the battery module 103 to meet the usage requirements of the sudden large current discharge of the load 105, which is beneficial to improving the battery discharge performance.

[0057] In an alternative embodiment, as Figure 2 shown, Figure 2 is a schematic structural diagram of an energy storage control circuit disclosed in an embodiment of the present application. Among them, the energy storage control circuit 102 includes an energy storage module 1021 and a first switch module 1022, where:

[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 to be electrically connected to 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 main control circuit 101. The second end of the energy storage module 1021 is used to be electrically connected to 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 main control circuit 101, and the energy storage module 1021 is communicatively connected to the main control module through a wireless communication network;

[0059] The first switch module 1022 is used to control the state of the first switch module 1022 under the control of the main control circuit 101; and when the first switch module 1022 is in the closed state, output the power of the energy storage module 1021 to the load 105 to realize the auxiliary discharge of the battery module 103.

[0060] Optionally, the first switch module 1022 may include a DC-DC converter (i.e., a direct current - direct current converter), a MOS transistor, a small relay, or other components or modules that can play an equivalent switching role. The embodiments of the present application do not make limitations.

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

[0062] It can be seen that this optional embodiment can accurately realize the conduction control of the energy storage module 1021 by setting the first switch module 1022 under the control of the main control circuit 101, and can accurately output the power of the energy storage module 1021 to the load 105 when the first switch module 1022 is closed, which is beneficial to realizing the auxiliary discharge of the battery module 103.

[0063] In this optional embodiment, as an optional implementation manner, as Figure 2 shown, the energy storage module 1021 includes a supercapacitor module 10211 and a first current detection unit 10212, where:

[0064] The first end of the supercapacitor module 10211 is electrically connected to the first end of the first switch module 1022, the second end of the supercapacitor module 10211 is electrically connected to the first end of the first current detection unit 10212, the controlled end of the supercapacitor module 10211 is electrically connected to the control end of the main control circuit 101, the second end of the first current detection unit 10212 is used to electrically connect to the negative electrode of the battery module 103, and the first current detection unit 10212 is communicatively connected to the main control module via a wireless communication network.

[0065] Optionally, the supercapacitor module 10211 can be a module composed of multiple supercapacitors connected in series, or a module composed of multiple supercapacitors connected in parallel, or a module composed of multiple supercapacitors connected in series (multiple supercapacitors are first connected in series and then in parallel, or multiple supercapacitors are first connected in parallel and then in series). For example, taking 7 supercapacitors connected in series to form a supercapacitor module 10211 as an example, the energy storage-related data of the supercapacitor module 10211 can be: the internal resistance of the capacitor series is 105mΩ, the maximum voltage of the single capacitor is 2.7V, the maximum discharge current is 54A, and the maximum temperature is 70°C. Optionally, the first current detection unit 10212 may include a shunt resistor, a current detection amplifier, or other components or modules that can play an equivalent current detection role. Optionally, the capacitor current data detected by the first current detection unit 10212 may include the total current of the supercapacitor module 10211, and may also include the current of each branch where the supercapacitor is located, which is not limited in the embodiment of the present application.

[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 may include:

[0067] The main control circuit 101 determines whether the current condition of the energy storage control circuit 102 satisfies the preset switch disconnection condition according to the received capacitance 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 disconnection condition, the main control circuit 101 controls the energy storage control circuit 102 to be in a disconnected state.

[0069] Specifically, the main control circuit 101 determines whether the current of any branch where the supercapacitor is located is greater than a preset current, such as 50A; if so, the first switch module 1022 included in the energy storage control circuit 102 is controlled to be disconnected, so that the energy storage control circuit 102 is in a disconnected state.

[0070] It can be seen that this optional implementation can achieve auxiliary discharge of the battery module 103 by setting the supercapacitor module 10211 as the energy storage module, and by setting the first current detection unit 10212 for current detection of the supercapacitor branch, the current detection accuracy of the supercapacitor module 10211 can be improved, which is beneficial to realizing the precise control of the first switch module 1022 by the main control circuit 101 according to the current data of the supercapacitor module 10211.

[0071] In this optional implementation, optionally, as Figure 2 shown, the energy storage control circuit 102 further includes an equalization control module 1023, where:

[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 supercapacitor module 10211, and the output end of the equalization control module 1023 is electrically connected to the fourth end of the supercapacitor module 10211;

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

[0074] Further optionally, a communication interface is provided between the equalization control module 1023 and the main control circuit 101, which is used to send the voltage and current of the supercapacitor module 10211 to the main control circuit 101, and is also used to send the equalization control instruction from the main control circuit 101 to the equalization control module 1023, so as to realize the main control circuit 101 controlling the equalization control module 1023 to perform an equalization control operation on each capacitor included in the supercapacitor module 10211. Among them, the communication interface of the main control circuit 101 and the equalization control module 1023 is used for the main control circuit 101 to receive the voltage / current / equalization state of the capacitor detected by the equalization control module 1023. And the main control circuit 101 actively issues an equalization control (start / stop) instruction to the equalization control module 1023.

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

[0076] The first input terminal of the first AFE chip is electrically connected to the third terminal of the first current detection unit 10212. The second input terminal of the first AFE chip is electrically connected to the third terminal of the supercapacitor module 10211. The output terminal of the first AFE chip is electrically connected to the fourth terminal of the supercapacitor module 10211. And the communication interface of the first AFE chip is communicatively connected to the communication interface of the main control circuit 101. Among them, the first AFE chip is used to monitor at least one of the voltage of the supercapacitor, the current in the branch where the supercapacitor is located, and the temperature of the supercapacitor, as the energy storage related data of the energy storage control circuit 102, and is also used for the balancing function between series-connected supercapacitors. Among them, the first AFE chip is selected as TI-BQ76907 (this can save costs and take into account the working voltage), and the lowest working voltage of the first AFE chip is 6V. Optionally, the capacitor voltage data of the supercapacitor monitored by the first AFE chip may include the total voltage of the supercapacitor module 10211, and may also include the voltage of each supercapacitor. The capacitor temperature data monitored by the first AFE chip may include the temperature of the environment where the supercapacitor module 10211 is located. The balancing control instruction may include a start balancing instruction or a stop balancing instruction, which is not limited in the embodiments of the present application.

[0077] In this optional embodiment, during the operation of the main control circuit 101 and when the first switch module 1022 is in the off state, if the maximum capacitor cell voltage remains greater than or equal to Vmax (2.2V) and lasts for more than 30s (the normal average voltage is 2.0V) at this time, then mark the highest capacitor cell voltage as the voltage that needs to be balanced; at this time, obtain the balancing current I (for example, designed according to an average of 5mA), and determine that the balancing requirement for the highest capacitor cell voltage is to decrease by 0.2V; according to the capacitance (the capacitor is used as a discharge battery, and its capacitance can be represented by the discharge current multiplied by the discharge time. Exemplarily, the discharge current is 9A and the discharge time is 1.5s), the wake-up required balancing time 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 its operation and when the first switch module 1022 is off.

[0078] It should be noted that the balancing process needs to meet the following conditions: the voltage range of the capacitor cell to be balanced is between 1.7V - 2.8V, the temperature range of the capacitor cell is between -20°C - 45°C, the first switch module 1022 is off, the capacitor voltage and capacitor temperature are effectively collected, and there is no failure in the balancing circuit, etc.; if any of the above conditions is not met, the balancing process is exited.

[0079] Exemplarily, when a communication failure occurs in the first AFE chip (e.g., when the capacitance voltage is lower than 6V, and AFE2 cannot communicate due to insufficient supply voltage), the processing method of the main control circuit 101 specifically includes:

[0080] The main control circuit 101 determines whether the current total voltage of the battery cells is within the range of 9 to 14V, whether there is no serious fault in the overall PACK interface 104, and whether the temperature of the battery cells is within the range of -20°C to 50°C;

[0081] When it is determined that all the above conditions are met, the main control circuit 101 periodically turns on and off the first switch module 1022 (closes for 100 ms, disconnects for 30 seconds, and cycles 50 times) to perform pulsed charging on the capacitor. If the signal of AFE2 is re-identified during the cycle, it is executed according to the normal charging method.

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

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

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

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

[0086] The main control circuit 101 determines whether the total voltage of the supercapacitor module 10211 is greater than or equal to the preset full charge voltage, e.g., 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 the first preset temperature, e.g., -25°C (the full charge voltage of the battery pack 107 used to charge the supercapacitor module 10211 is 14V; disconnecting when the capacitor is fully charged is to avoid the capacitor following the charge and discharge of the battery module frequently), which is recorded as the second disconnection 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 the second preset temperature, e.g., 60°C (when the temperature is greater than the second preset temperature, it means that the environment where the supercapacitor module 10211 is located is overheated), which is recorded as the third disconnection condition;

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

[0089] In this alternative embodiment, optionally, 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 this solution sets overcharge protection and over-temperature protection, but does not set over-discharge protection, which can avoid the situation where the supercapacitor cannot release energy due to the setting of over-discharge protection when the supercapacitor needs to discharge.

[0091] It can be seen that this alternative embodiment can also accurately detect the energy storage related data of the supercapacitor module 10211 by setting the equalization control module 1023, and the equalization control of the supercapacitor module 10211 can be accurately realized by controlling the equalization control module 1023 through the main control circuit 101, which is beneficial to improving the performance and stability of the overall circuit; in addition, compared with the existing supercapacitor-assisted discharge method of directly controlling the first switch module 1022 by an AFE chip powered by a supercapacitor, the method of controlling by the main control circuit 101 powered by the battery module 103 or an external power supply instead of the AFE chip in this solution can reduce the situation where the AFE chip does not work due to capacitor discharge and cannot control the first switch module 1022, which is beneficial to improving the control accuracy, reliability, and stability of the switch corresponding to the supercapacitor module 10211.

[0092] In another alternative embodiment, as Figure 3 shown, Figure 3 is a schematic structural diagram of another control circuit for assisting the battery to discharge disclosed in the embodiment of the present application. Among them, the control circuit for assisting the battery to discharge further includes a pre-charge module 106, and the pre-charge module 106 includes a second switch module 1061 and a voltage conversion module 1062, where:

[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 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 used 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 used to be electrically connected to the preset battery pack 107;

[0094] The second switch module 1061 is configured to supply 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, when the second switch module 1061 is in a closed state, supply the voltage output by the battery pack 107 to the energy storage control circuit 102 through the voltage conversion module 1062.

[0095] Optionally, the voltage conversion module 1062 may be a device for converting DC voltage (such as a DC / DC converter), or a device for converting AC voltage to DC voltage. The battery pack 107 may be a high-voltage battery pack 107. In this case, the voltage conversion module 1062 is a DC / DC converter, which is used to convert the high voltage output by the high-voltage battery pack 107 into a low voltage used as the charging voltage of the supercapacitor module 10211. The embodiments of the present application do not make any limitations.

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

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

[0098] 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. The second current detection unit 1032 is communicatively connected to the main control module through a wireless communication network;

[0099] 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 main control module, so that the main 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.

[0100] Further, as Figure 3 shown, the control circuit for assisting the discharge of the battery further includes a second AFE chip. The second AFE chip is electrically connected to the third terminal of the battery cell module 1031, and the second AFE chip is communicatively connected to the main control circuit 101. Among them, the second AFE chip is used to detect the battery voltage 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 switch closing condition according to one of the received capacitor voltage data, capacitor temperature data of the energy storage control circuit 102, and the 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 switch closing condition, the main control circuit 101 controls the energy storage control circuit 102 to be in a closed state.

[0104] Exemplarily, the main control circuit 101 determines whether the cumulative total voltage of the supercapacitor module 10211 (such as 13V) is less than the preset recharge voltage and the battery pack 107 is in a normal working state (since the normal self-power consumption of the capacitor is used for the recharge of the capacitor branch, it is triggered about once every 13 hours), which is recorded as the first closing condition; or,

[0105] The main control circuit 101 determines whether the battery temperature of the battery cell module 1031 is lower than the third preset temperature, such as: -25 °C, and whether the highest capacitor voltage is less than the preset overvoltage, such as: 2.7V, which is recorded as the second closing condition; or,

[0106] The main control circuit 101 determines whether the battery pack 107 is about to enter the sleep state (when the battery pack 107 is in the sleep state, the capacitor voltage cannot be monitored and it is not allowed to connect the capacitor for recharge, which can avoid damage to the capacitor due to overvoltage), which is recorded as the third closing condition;

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

[0108] Among them, the calculation method of the recharge interval in the first closing condition is as follows:

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

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

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

[0112] By reverse deduction, it is obtained that: the charging interval Δt = 14.28 F * 1 V / 0.0003 A = 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 highest capacitor voltage is greater than the preset overvoltage, the first switch module 1022 is not closed. In this way, when the battery discharges 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 this optional implementation manner 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, and thus is beneficial to improving the state control accuracy and reliability of the main control circuit 101 for the energy storage control circuit 102 based on richer data.

[0115] Exemplarily, as Figure 4 shown, Figure 4 is a schematic diagram of the architecture of a control circuit for auxiliary discharge of a battery disclosed in an embodiment of the present application. Among them, the control circuit for auxiliary discharge of the battery is provided with a wireless communication network (i.e., Figure 4 the Low Power Network in Figure 4 ), the positive electrode of the battery cell module 1031 (i.e., Figure 4 BAT+ in Figure 4 ) is electrically connected to the first end of the first switch module 1022 (i.e., Figure 4 CB2 in Figure 4 ) and the first end of the first switch module 1022 (i.e., Figure 4 CB1 in Figure 4 ), the negative electrode of the battery cell module 1031 (i.e., Figure 4 BAT- inFigure 4 CB control in), the second end of the second switch module 1061 is electrically connected to the voltage conversion module 1062 (i.e., Figure 4 DC / DC in), 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 equalization control module 1023 (i.e., Figure 4 AFE module B in), the second input end of the equalization control module 1023 is electrically connected to the third end of the supercapacitor module 10211, the output end of the equalization control module 1023 is electrically connected to the fourth end of the supercapacitor module 10211, the power supply end of the voltage conversion module 1062 is used to be electrically connected to the preset battery pack 107 (i.e., Figure 4 high-voltage battery pack in), both the second AFE chip and the equalization control module 1023 are communicatively connected to the main control circuit 101 through a wireless communication network. It should be noted that the energy storage control circuit 102 composed of the supercapacitor module 10211, the first switch module 1022, the first current detection unit 10212 and the equalization control module 1023 can be arranged on the expansion board corresponding to the battery module 103, and a PACK interface 104 is arranged on this expansion board. The positive pole of this PACK interface 104 is denoted as KL30, and the negative pole of this PACK interface 104 is denoted as KL31.

[0116] Combined with Figures 1 - 4 , the working principle of the control circuit for assisting the battery discharge in this application is elaborated in detail as follows:

[0117] In the embodiment of the present application, when the battery cell module 1031 in the battery module 103 discharges to the load 105, the main control circuit 101 determines whether the current condition of the energy storage control circuit 102 meets the preset switch-off condition according to one of the capacitor voltage data, capacitor temperature data of the supercapacitor module 10211 in the energy storage control circuit 102 and the capacitor current data of the supercapacitor 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-off condition, that is, when the energy storage control circuit 102 does not need to assist in discharging during the discharge of the battery cell module 1031 to the load 105, the main control circuit 101 controls the first switch module 1022 in the energy storage control circuit 102 to disconnect, so that the supercapacitor module 10211 in the energy storage control circuit 102 does not discharge to the load 105 (such as an electric vehicle); and / or, the main control circuit 101 determines whether the current condition of the energy storage control circuit 102 meets the preset switch-on condition according to one of the capacitor voltage data, 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-on condition, that is, when the energy storage control circuit 102 needs to assist in discharging during the discharge of the battery cell module 1031 to the load 105, the main control circuit 101 controls the first switch module 1022 in the energy storage control circuit 102 to close, so that the supercapacitor module 10211 in the energy storage control circuit 102 assists the battery cell module 1031 to discharge to the load 105; in addition, when the voltage of the largest supercapacitor cell exceeds the average voltage, the main control circuit 101 has an equalization requirement for the supercapacitor. The main control circuit 101 calculates the required equalization time according to the pre-determined equalization current and the capacity of the supercapacitor, and issues an equalization start instruction to the equalization control module 1023, and controls the equalization control module 1023 to perform equalization control on the supercapacitor module 10211 within this equalization time. The equalization process needs to meet the following conditions: the voltage range of the capacitor cells to be equalized is between 1.7V and 2.8V, the temperature range of the capacitor cells is between -20°C and 45°C, the first switch module 1022 is disconnected, the capacitor voltage and capacitor temperature are effectively collected, and there is no failure in the equalization circuit. If any of the above conditions is not met, the equalization process is exited. It can output the power of the energy storage control circuit 102 to the load 105 under the control of the main control circuit 101, and can accurately realize the auxiliary discharge of the battery module 103 to meet the usage requirements of the sudden large-current discharge of the load 105, which is beneficial to improving the battery discharge performance.

[0118] Embodiment 2

[0119] Please refer to Figure 5 , Figure 5 which is a schematic flow chart of a control method for auxiliary discharge of a battery disclosed in an embodiment of the present application. Among them, Figure 5 the described control method for auxiliary discharge of a battery can be applied to electronic products (such as electric vehicles) provided with a control circuit for auxiliary discharge of a battery. Among them, the control circuit for auxiliary discharge of a battery includes a main control circuit and an energy storage control circuit. Among them, the first end of the energy storage control circuit is used to be electrically connected to the positive electrode of the battery module, the second end of the energy storage control circuit is used to be electrically connected to the negative electrode of the battery module, both the energy storage control circuit and the battery module are communicatively connected to the main control module through a wireless communication network, the control end of the main control circuit is electrically connected to the controlled end of the energy storage control circuit, and the energy storage control circuit is provided with a PACK interface for electrically connecting to a load; as Figure 5 shown, the control method for auxiliary discharge of a battery may include the following operations:

[0120] 201. When the battery module discharges to the load, the main 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 main control circuit, the energy storage control circuit outputs the power of the energy storage control circuit to the load to achieve auxiliary discharge of the battery module.

[0122] It should be noted that for other related descriptions of the above control for auxiliary discharge of a battery, please refer to other descriptions of the control for auxiliary discharge of a battery in Embodiment 1, which will not be elaborated here.

[0123] It can be seen that implementing Figure 5 the described control method for auxiliary discharge of a battery can, by setting an energy storage control circuit, when the battery module discharges to the load, output the power of the energy storage control circuit to the load under the control of the main control circuit, accurately achieve auxiliary discharge of the battery module, meet the usage requirements of the load for sudden large current discharge, and is beneficial to improving the battery discharge performance

[0124] In an optional embodiment, the energy storage related data includes one or a combination of more of capacitor voltage data, capacitor temperature data, and capacitor current data. And, the main 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 may include:

[0125] The main control circuit determines whether the current condition of the energy storage control circuit meets a preset switch-off 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 determined that the current condition of the energy storage control circuit meets the switch-off condition, the main control circuit controls the energy storage control circuit to be in the off state; and / or,

[0127] The main control circuit determines whether the current condition of the energy storage control circuit meets the preset switch-on condition according to one of the capacitor voltage data, capacitor temperature data of the energy storage control circuit, and battery data of the battery module.

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

[0129] It can be seen that this optional embodiment can, by setting the switch-on process, enable the main control circuit to quickly and accurately determine whether the energy storage control circuit has the need for auxiliary discharge during the discharge of the battery module to the load according to diverse capacitor-related data. And when the judgment result is yes, the main control circuit controls the energy storage control circuit to close, so as to output the electric quantity of the energy storage control circuit to the load, and can accurately achieve the auxiliary discharge of the energy storage control circuit. Also, by setting the switch-off process, the main control circuit can quickly and accurately determine whether the energy storage control circuit needs to stop performing the auxiliary discharge operation according to diverse capacitor-related data or battery data. And when the judgment result is yes, the main control circuit controls the energy storage control circuit to disconnect, which is beneficial to improving the control accuracy and reliability of the main control circuit for the energy storage control circuit through multiple state control processes for the energy storage control circuit.

[0130] Embodiment III

[0131] Please refer to Figure 6 , Figure 6 which is a schematic structural diagram of a control device disclosed in an embodiment of the present application. Among them, Figure 6 the described control device is an electronic product provided with a control circuit capable of performing auxiliary discharge on the battery, and this control device includes a device body. This control device further includes a control circuit for performing auxiliary discharge on the battery as in Embodiment I, and this control device is used to implement the control circuit for performing auxiliary discharge on the battery in Embodiment II. It should be noted that for the detailed description of the above control circuit for performing auxiliary discharge on the battery, please refer to the specific description of the relevant content in Embodiment I, and it will not be repeated in the embodiments of the present application.

[0132] It can be seen that the described control device Figure 6 can, by setting an energy storage control circuit, output the electric quantity 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 can accurately achieve the auxiliary discharge of the battery module to meet the usage requirements of the load for sudden large-current discharge, which is beneficial to improving the battery discharge performance.

[0133] Finally, 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 only disclose the preferred embodiments of the present application, and are only used to illustrate the technical solutions of the present application, rather than limiting them; Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; And these modifications or replacements do not make the essence of 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 in that: The circuit comprises a main control circuit (101) and an energy storage control circuit (102), wherein: The first end of the energy storage control circuit (102) is used to electrically connect to the positive electrode of the battery module (103), and the second end of the energy storage control circuit (102) is used to electrically connect to the negative electrode of the battery module (103). The energy storage control circuit (102) and the battery module (103) are both communicatively connected to the main control module via a wireless communication network. The control end of the main control circuit (101) is electrically connected to the controlled end of the energy storage control circuit (102). The energy storage control circuit (102) is provided with a PACK interface (104) for electrically connecting to a load (105). The main control circuit (101) is used to control 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) when the battery module (103) discharges the load (105); The energy storage control circuit (102) is used to output the electric quantity of the energy storage control circuit (102) to the load (105) under the control of the main control circuit (101), so as to realize auxiliary discharge of the battery module (103).

2. The control circuit for assisting battery discharge according to claim 1, characterized in that: 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 to electrically connect to 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 main control circuit (101); the second end of the energy storage module (1021) is used to electrically connect to 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 main control circuit (101); and the energy storage module (1021) is communicatively connected to the main control module via the wireless communication network; The first switch module (1022) is used to control the state of the first switch module (1022) under the control of the main control circuit (101); and when the first switch module (1022) is in a closed state, output the power of the energy storage module (1021) to the load (105), so as to achieve auxiliary discharge of the battery module (103).

3. The control circuit for assisting battery discharge according to claim 2, characterized in that: The energy storage module (1021) comprises a supercapacitor module (10211) and a first current detection unit (10212), wherein: The first end of the supercapacitor module (10211) is electrically connected to the first end of the first switch module (1022), the second end of the supercapacitor module (10211) is electrically connected to the first end of the first current detection unit (10212), the controlled end of the supercapacitor module (10211) is electrically connected to the control end of the main control circuit (101), the second end of the first current detection unit (10212) is used to electrically connect to the negative electrode of the battery module (103), and the first current detection unit (10212) is communicatively connected to the main control module via the wireless communication network.

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

5. The control circuit for assisting battery discharge according to claim 4, characterized in that: A communication interface is provided between the balancing control module (1023) and the main control circuit (101), for sending the voltage and current of the supercapacitor module (10211) to the main control circuit (101), and for sending a balancing control instruction from the main control circuit (101) to the balancing control module (1023), so that the main control circuit (101) controls the balancing control module (1023) to perform a balancing control operation on each of the capacitors included in the supercapacitor module (10211).

6. The control circuit for assisting battery discharge according to any one of claims 1 to 5, characterized in that: 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), wherein: 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 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 used to electrically connect 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 used to electrically connect to a preset battery pack (107); The second switch module (1061) is used 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, when the second switch module (1061) is in a closed state, to provide the voltage output by the battery pack (107) to the energy storage control circuit (102) through the voltage conversion module (1062).

7. The control circuit for assisting battery discharge according to claim 6, characterized in that: 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 communicatively connected to the main control module via the wireless communication network; The second current detection unit (1032) is used to detect the current of the battery cell module (1031) and send the current of the battery cell module (1031) to the main control module, so that the main control module calculates the charge state 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 charge state of the battery cell module (1031) as battery data of the battery module (103).

8. A control method for auxiliary discharge of a battery, characterized in that: The method is applied to a control circuit for assisting discharge of a battery, and the circuit includes a main control circuit and an energy storage control circuit, wherein a first end of the energy storage control circuit is used to electrically connect to a positive electrode of a battery module, a second end of the energy storage control circuit is used to electrically connect to a negative electrode of the battery module, the energy storage control circuit and the battery module are both communicatively connected to the main control module via a wireless communication network, a control end of the main 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 to a load; the method includes: When the battery module discharges the load, the main 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; Under the control of the main control circuit, the energy storage control circuit outputs the electric quantity of the energy storage control circuit to the load to realize auxiliary discharge of the battery module.

9. The control method for auxiliary discharge of a battery according to claim 8, characterized in that: The energy storage related data includes one or more combinations of capacitor voltage data, capacitor temperature data and capacitor current data; Furthermore, the main 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, including: The main control circuit determines whether the current condition of the energy storage control circuit meets the preset switch disconnection condition according to one of the capacitor voltage data, capacitor temperature data and capacitor current data received from the energy storage control circuit; When it is determined that the current condition of the energy storage control circuit meets the switch disconnection condition, the main control circuit controls the energy storage control circuit to be in a disconnected state; and / or, The main control circuit determines 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 of the energy storage control circuit and battery data of the battery module; When it is determined 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 a closed state.

10. A control device, comprising a device body, characterized in that: The control device further comprises a control circuit for assisting discharge of a battery as claimed in any one of claims 1 to 7.

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