Method and device for enabling battery pack to be matched with high-power load to start

Abstract

The invention discloses a method and a device for enabling a battery pack to be matched with a high-power load to start up. The method comprises the following steps: measuring the current of a battery pack, generating a first level signal after first preset delay time when the current is greater than a first preset current threshold value, controlling to enter a first-time first-level hardware short-circuit protection process according to the first level signal so as to control the battery pack to stop discharging, and controlling to enter a second-time first-level hardware short-circuit protection process when the current is greater than a second preset current threshold value. And generating a second level signal after a second preset delay time, and controlling to enter a secondary hardware short-circuit protection process according to the second level signal so as to control the battery pack to stop discharging. Due to the fact that setting of the first preset current threshold value and the second preset current threshold value gives consideration to the service life and the adaptability to the maximum degree, when the current is larger than different current threshold values, different short-circuit protection can be triggered, and the battery pack with the protection plate can better meet the requirement for high-power pulse current in the starting operation process of a high-power load.

Description

Technical Field

[0001] The present invention relates to the technical field of load power-on control, and particularly to a method and device for a battery pack to adapt to a high-power load for power-on. Background Art

[0002] With the continuous improvement of people's living conditions, outdoor camping is becoming more and more popular. The weight requirement for the battery pack in outdoor scenarios is relatively high. Since lithium batteries have a higher energy density with the same weight and volume, more and more outdoor camping scenarios choose lithium battery packs. Most of the daily household appliances on the market currently are AC input. When users are in the wild, they often need an inverter to convert the DC power of the battery into AC power.

[0003] The high-power high-frequency inverter has relatively large capacitors at both the input and output. Therefore, when the battery pack is connected to the inverter and when the inverter establishes the output, a large charging current for the capacitor will be generated. The battery pack is very likely to trigger short-circuit protection, making the inverter unable to start normally, and further causing the load to be unable to start and be used normally. Summary of the Invention

[0004] The present invention provides a method and device for a battery pack to adapt to a high-power load for power-on, so as to solve the problem in the prior art that when the battery pack is connected to the inverter and when the inverter establishes the output, a large charging current for the capacitor will be generated. The battery pack is very likely to trigger short-circuit protection, making the inverter unable to start normally, and further causing the load to be unable to start and be used normally.

[0005] According to one aspect of the present invention, a method for a battery pack to adapt to a high-power load for power-on is provided, including:

[0006] Measuring the current of the battery pack;

[0007] When the current is greater than the first preset current threshold, generating a first level signal after a first preset delay time;

[0008] When the current is greater than the second preset current threshold, generating a second level signal after a second preset delay time;

[0009] According to the first level signal, controlling to enter the first-level hardware short-circuit protection process to control the battery pack to stop discharging;

[0010] According to the second level signal, controlling to enter the second-level hardware short-circuit protection process to control the battery pack to stop discharging.

[0011] Optionally, the first-level hardware short-circuit protection process includes:

[0012] Determine whether the state value of the "forced compatibility with high-power load flag" is a first preset value;

[0013] If yes, then exit the first level one hardware short circuit protection process; if no, then determine whether the state value of "continuous level one hardware short circuit protection" is the first preset value;

[0014] If yes, then enter the first-level hardware short-circuit protection process again; if no, then turn off the discharge switch and temporarily record the number of first-level hardware short-circuit protection times;

[0015] Accumulating and storing the number of times of the first-level hardware short-circuit protection;

[0016] The status values of "continuous first-level hardware short-circuit protection" and "first-level hardware short-circuit protection" are set to the first preset values.

[0017] Optionally, the second level hardware short circuit protection process includes:

[0018] Turn off the discharge switch to stop the battery pack from discharging;

[0019] Accumulating and storing the number of times of the first-level hardware short-circuit protection;

[0020] The reason why the last level 1 hardware short circuit protection was released and the time interval between the current triggering of the level 1 hardware short circuit and the last triggering of the level 1 hardware short circuit are recorded;

[0021] The current state value of "second-level hardware short-circuit protection" is set to the first preset value.

[0022] Optionally, the secondary hardware short-circuit protection process includes:

[0023] Record the number of secondary hardware short-circuit protection times;

[0024] Accumulating and storing the secondary hardware short-circuit protection times;

[0025] Storing the current of the battery pack before and after the secondary hardware short-circuit protection is triggered;

[0026] The current state value of "secondary hardware short circuit protection" is set to the first preset value.

[0027] Optionally, after controlling to enter the first level hardware short-circuit protection process to stop discharging the battery pack according to the first level signal; or controlling to enter the second level hardware short-circuit protection process to stop discharging the battery pack according to the second level signal, it also includes entering the short-circuit protection release processing process.

[0028] The short circuit protection release process includes:

[0029] Obtaining the current of the battery pack based on a preset period;

[0030] Determine whether the first-level hardware short-circuit protection exists; if the first-level hardware short-circuit protection exists, determine whether there is "first-time first-level hardware short-circuit protection"; if the first-level hardware short-circuit protection does not exist, determine whether the state value of "continuous first-level hardware short-circuit protection" is the first preset value;

[0031] If there is "first level hardware short circuit protection", the process of releasing the first level hardware short circuit protection will be entered; if there is no "first level hardware short circuit protection", it will be determined whether there is "second level hardware short circuit protection";

[0032] If there is "second level one hardware short circuit protection", the process of releasing the second level one hardware short circuit protection is entered; if there is no "second level one hardware short circuit protection", it is determined whether the state value of the "forced compatibility with high-power load flag" is the first preset value;

[0033] If yes, then time accumulation is performed;

[0034] Determine whether the duration of the "forced high-power load compatibility flag" is greater than a first preset time threshold;

[0035] If it is greater than, setting the duration and the state value of the "forced compatibility with high-power load flag" to a second preset value;

[0036] If not, determine whether there is "secondary hardware short circuit protection";

[0037] If there is "secondary hardware short circuit protection", enter the secondary hardware short circuit protection release process;

[0038] If there is no "secondary hardware short-circuit protection", exit the short-circuit protection release process;

[0039] If the status value of "continuous first-level hardware short-circuit protection" is the first preset value, then the time is accumulated; if the status value of "continuous first-level hardware short-circuit protection" is not the first preset value, then it is returned to determine whether the status value of "forced compatibility with high-power load flag" is the first preset value;

[0040] Determine whether the duration of "continuous first-level hardware short-circuit protection" is greater than the second preset time threshold; if greater, set the duration and the status value of the "continuous first-level hardware short-circuit protection" to the second preset value, and return to determine whether the status value of the "forced compatibility with high-power load flag" is the first preset value.

[0041] Optionally, the first level one hardware short circuit protection release process includes:

[0042] Accumulate the trigger time of the first-level hardware short-circuit protection;

[0043] Determine whether the trigger time is greater than the third preset delay time; if so, enter the battery pack connection status determination process;

[0044] If not, exit the first-level hardware short-circuit protection release process;

[0045] Determine whether the connection status of the battery pack is "connected to a capacitive load", "charger connected", or "load removed";

[0046] If so, release the first-level hardware short-circuit protection and temporarily record the release reason and exit the first-level hardware short-circuit protection release process;

[0047] If not, continue to maintain the protection status of the first-level hardware short-circuit protection and exit the first-level hardware short-circuit protection release process.

[0048] Optionally, the second-level hardware short-circuit protection release process includes:

[0049] Accumulate the trigger time of the second-level hardware short-circuit protection;

[0050] Determine whether the trigger time is greater than the fourth preset delay time; if so, enter the battery pack connection status determination process;

[0051] If not, exit the second-level hardware short-circuit protection release process;

[0052] Determine whether the connection status of the battery pack is "charger connected" or "load removed";

[0053] If so, release the second-level hardware short-circuit protection and temporarily record the release reason and exit the second-level hardware short-circuit protection release process;

[0054] If not, continue to maintain the protection status of the second-level hardware short-circuit protection and exit the second-level hardware short-circuit protection release process.

[0055] Optionally, the second-level hardware short-circuit protection release process includes:

[0056] Accumulate the trigger time of the second-level hardware short-circuit protection;

[0057] Determine whether the trigger time is greater than the fifth preset delay time; if so, enter the battery pack connection status determination process;

[0058] If not, exit the second-level hardware short-circuit protection release process;

[0059] Determine whether the connection status of the battery pack is "charger connected";

[0060] If yes, the secondary hardware short-circuit protection is released, the charging switch is enabled, and then the secondary hardware short-circuit protection release process is exited;

[0061] If not, continue to maintain the protection state of the secondary hardware short-circuit protection and exit the secondary hardware short-circuit protection release process.

[0062] Optionally, the battery pack connection status determination process includes:

[0063] Measure the voltage of the battery pack;

[0064] If the voltage is the rated voltage of the battery pack, determining that the connection state of the battery pack is “charger connected”, and exiting the battery pack connection state determination process;

[0065] If the voltage is greater than 0 and less than the rated voltage, determining that the connection state of the battery pack is "connected capacitive load", and exiting the battery pack connection state determination process;

[0066] If the voltage is 0, turning on the pre-charge switch to charge the battery pack and continuing to measure the voltage of the battery pack;

[0067] If the voltage increases, the pre-charging switch is turned off and the connection state of the battery pack is determined to be "load removed", and the battery pack connection state determination process is exited;

[0068] If the voltage is still zero, the pre-charge switch is turned off, the battery pack is in a continuous short-circuit state, and the battery pack connection state judgment process is exited.

[0069] According to another aspect of the present invention, a device for starting a battery pack adapted to a high-power load is provided, comprising:

[0070] A current measurement module, wherein the current measurement module is used to measure the current of the battery pack;

[0071] An operational amplifier module, the operational amplifier module is used to generate a first level signal after a first preset delay time when the current is greater than a first preset current threshold;

[0072] The operational amplifier module is further configured to generate a second level signal after a second preset delay time when the current is greater than a second preset current threshold;

[0073] A control module, the control module is used to control the first level hardware short circuit protection process to stop the battery pack from discharging according to the first level signal;

[0074] The control module is further configured to control entering a secondary hardware short - circuit protection process according to the second level signal to control the battery pack to stop discharging.

[0075] In the technical solution provided by the embodiment of the present invention, by measuring the current of the battery pack, when the current is greater than the first preset current threshold, a first level signal is generated after a first preset delay time. According to the first level signal, control is performed to enter the first - level hardware short - circuit protection process to control the battery pack to stop discharging. When the current is greater than the second preset current threshold, a second level signal is generated after a second preset delay time. According to the second level signal, control is performed to enter the secondary hardware short - circuit protection process to control the battery pack to stop discharging. Since the settings of the first preset current threshold and the second preset current threshold maximize the consideration of both life and adaptability, different short - circuit protections are triggered when the current is greater than different current thresholds, enabling the battery pack with a protection board to better adapt to the requirement of a large - power pulsed current during the startup operation of a high - power load. This solves the problem that when the battery pack is connected to the inverter and when the inverter establishes output, a large charging current for the capacitor will be generated, and the battery pack is easily triggered into short - circuit protection, resulting in the inverter being unable to start normally and further causing the load to be unable to start up and be used normally.

[0076] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understandable through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0078] Figure 1 It is a flowchart of a method for a battery pack to adapt to the startup of a high - power load provided by an embodiment of the present invention;

[0079] Figure 2 It is a hardware schematic diagram of a battery pack provided by an embodiment of the present invention;

[0080] Figure 3 It is a hardware block diagram of the first - level hardware short - circuit protection provided by an embodiment of the present invention;

[0081] Figure 4 It is a hardware block diagram of the secondary hardware short - circuit protection provided by an embodiment of the present invention;

[0082] Figure 5Schematic diagram of the first - level primary hardware short - circuit protection process provided by the embodiments of the present invention;

[0083] Figure 6 Schematic diagram of the re - level primary hardware short - circuit protection process provided by the embodiments of the present invention;

[0084] Figure 7 Schematic diagram of the secondary hardware short - circuit protection process provided by the embodiments of the present invention;

[0085] Figure 8 Schematic diagram of the short - circuit protection release processing process provided by the embodiments of the present invention;

[0086] Figure 9 Schematic diagram of the first - level primary hardware short - circuit protection release process provided by the embodiments of the present invention;

[0087] Figure 10 Schematic diagram of the re - level primary hardware short - circuit protection release process provided by the embodiments of the present invention;

[0088] Figure 11 Schematic diagram of the secondary hardware short - circuit protection release process provided by the embodiments of the present invention;

[0089] Figure 12 Schematic diagram of the battery pack connection status judgment process provided by the embodiments of the present invention;

[0090] Figure 13 Schematic diagram of the forced compatibility with high - power loads process provided by the embodiments of the present invention;

[0091] Figure 14 Schematic diagram of the structure of a device for a battery pack to adapt to the startup of a high - power load provided by the embodiments of the present invention. Detailed implementation manners

[0092] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0093] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present invention are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0094] Figure 1 FIG. is a flowchart of a method for a battery pack to adapt to a high-power load to turn on. This embodiment is applicable to increasing the compatibility of the battery pack with different inverters and realizing the normal startup and use of the load. This method can be executed by a device for a battery pack to adapt to a high-power load to turn on. This device can be implemented in the form of hardware and / or software, and this device can be configured in any electronic device with communication functions. Figure 2 FIG. is a hardware schematic diagram of the battery pack provided by the embodiment of the present invention. Refer to Figure 2 , S1 is an output control switch, Q1 is a discharge switch, Q2 is a charging switch, F1 is a fuse, S2 is a pre-charge switch, R1 is a pre-charge resistor, P+ and P- are the positive and negative electrodes of the battery pack respectively. Among them, S2 and R1 form a pre-charge circuit, which is used to charge the battery pack by closing the pre-charge switch when the voltage of the battery pack is zero. Figure 3 FIG. is a hardware block diagram of the first-level hardware short-circuit protection provided by the embodiment of the present invention. Refer to Figure 3 , this first-level hardware short-circuit protection hardware block diagram includes a current measurement module, an operational amplifier module, a control module and a discharge switch. The current measurement module is connected to the operational amplifier module, the operational amplifier module is connected to the control module, the control module is connected to the discharge switch, and the current measurement module and the operational amplifier module are respectively also connected to the control module. Figure 4 FIG. is a hardware block diagram of the second-level hardware short-circuit protection provided by the embodiment of the present invention. Refer to Figure 4 , this second-level hardware short-circuit protection hardware block diagram includes a current measurement module, an operational amplifier module, a control module and a discharge switch. The current measurement module is connected to the operational amplifier module, the operational amplifier module is connected to the discharge switch, the operational amplifier module is also connected to the control module, the control module is connected to the discharge switch, and the current measurement module is also connected to the control module. Refer to Figures 1 to 4 , the method includes:

[0095] S110. Measure the current of the battery pack.

[0096] Specifically, measure the current of the battery pack through the current measurement module.

[0097] S120. When the current is greater than the first preset current threshold, a first level signal is generated after a first preset delay time.

[0098] Among them, the first preset current threshold can be preset according to the rated discharge current of the battery pack. In the embodiments of the present invention, 5-7 times the rated discharge current of the battery pack is set as the first preset current threshold; the first preset delay time can be preset according to the heat dissipation situation of the hardware circuit of the battery management system, aiming at having no impact on all power devices and not affecting the life of all power devices. In the embodiments of the present invention, the first preset delay time is set to 200-300 us. The first level signal is a signal generated when the current is greater than 5-7 times the rated discharge current and after a delay of 200-300 us.

[0099] Specifically, when the current is greater than the first preset current threshold (i.e., 5-7 times the rated discharge current), after the first preset delay time (i.e., a delay of 200-300 us), the operational amplifier module will generate a first level signal.

[0100] S130. When the current is greater than the second preset current threshold, a second level signal is generated after a second preset delay time.

[0101] Among them, the second preset current threshold can be preset according to the rated discharge current of the battery pack. In the embodiments of the present invention, 10 times the rated discharge current of the battery pack is set as the first preset current threshold; the second preset delay time can be preset according to the heat dissipation situation of the hardware circuit of the battery management system, based on the maximum value at which all power devices will not be damaged. In the embodiments of the present invention, the first preset delay time is set to a delay less than 100 us. The second level signal is a signal generated when the current is greater than 10 times the rated discharge current and after a delay less than 100 us. The first preset delay time is greater than the second preset delay time.

[0102] Specifically, when the current is greater than the second preset current threshold (i.e., 10 times the rated discharge current), after the second preset delay time (i.e., a delay less than 100 us), the operational amplifier module will generate a second level signal.

[0103] S140. According to the first level signal, control to enter the first-level hardware short-circuit protection process for the first time to control the battery pack to stop discharging.

[0104] Specifically, the operational amplifier module generating the first level signal will trigger an external interrupt signal of the control module in the battery management system of the battery pack. After receiving the external interrupt signal, the control module enters the first-level hardware short-circuit protection process for the first time, and realizes controlling the battery pack to stop discharging by controlling the turn-off of the discharge switch.

[0105] S150. Control the entry into the secondary hardware short - circuit protection process according to the second - level signal to control the battery pack to stop discharging.

[0106] Specifically, when the current is greater than the second preset current threshold, the operational amplifier module will directly disable the discharge switch driver according to the generated second - level signal, so as to more quickly open the discharge switch and control the battery pack to stop discharging, completing the protection operation of the battery pack. While turning off the discharge switch, the control module will receive an external interrupt signal, and the control module will perform subsequent corresponding short - circuit protection operations according to the external interrupt signal.

[0107] The technical solution provided by the embodiments of the present invention measures the current of the battery pack. When the current is greater than the first preset current threshold, after the first preset delay time, a first - level signal is generated. According to the first - level signal, control the entry into the first - stage primary hardware short - circuit protection process to control the battery pack to stop discharging. When the current is greater than the second preset current threshold, after the second preset delay time, a second - level signal is generated. According to the second - level signal, control the entry into the secondary hardware short - circuit protection process to control the battery pack to stop discharging. Since the settings of the first preset current threshold and the second preset current threshold maximize the consideration of both life and adaptability, different short - circuit protections are triggered when the current is greater than different current thresholds, enabling the battery pack with a protection board to better adapt to the demand for high - power pulsed current during the startup operation of high - power loads. It solves the problem that when the battery pack is connected to the inverter instantaneously and when the inverter establishes output instantaneously, a large charging current to the capacitor will be generated, and the battery pack is very likely to trigger short - circuit protection, making the inverter unable to start normally, and further causing the load to be unable to start up and use normally.

[0108] Figure 5 This is a schematic diagram of the first - stage primary hardware short - circuit protection process provided by the embodiments of the present invention. Refer to Figure 5 , based on the above - mentioned embodiments, optionally, the first - stage primary hardware short - circuit protection process includes:

[0109] S510. Determine whether the status value of the "forced compatibility with high - power load flag" is the first preset value; if so, execute S520; if not, execute S530.

[0110] Among them, the first preset value can be arbitrarily set to either 1 or 0 in advance. In the embodiments of the present invention, 1 is set as the first preset value for illustration. When the status value of the forced compatibility with high - power load flag is 1, the action of closing the discharge switch in the primary hardware short - circuit protection is not executed; only when the status value of the forced compatibility with high - power load flag is 0, the discharge switch will be closed after the primary hardware protection is triggered.

[0111] S520. Exit the first-level primary hardware short-circuit protection process.

[0112] S530. Determine whether the status value of "continuous primary hardware short-circuit protection" is the first preset value; if so, execute S540; if not, execute S550.

[0113] Among them, when the primary hardware short-circuit protection is triggered for the first time, the status value of the "continuous primary hardware short-circuit protection flag" is set to 1, and this flag needs to be assigned a value of 0 only when the first-level primary hardware short-circuit protection release time is greater than the continuous primary hardware short-circuit protection time threshold.

[0114] S540. Enter the re-primary hardware short-circuit protection process.

[0115] S550. Turn off the discharge switch and temporarily record the number of primary hardware short-circuit protections.

[0116] S560. Accumulate and store the number of primary hardware short-circuit protections.

[0117] S570. Set the status values of "continuous primary hardware short-circuit protection" and "first-level primary hardware short-circuit protection" to the first preset value.

[0118] Figure 6 The schematic diagram of the re-primary hardware short-circuit protection process provided by the embodiment of the present invention is shown in Figure 6 , on the basis of the above embodiment, optionally, the re-primary hardware short-circuit protection process includes:

[0119] S610. Turn off the discharge switch to control the battery pack to stop discharging.

[0120] S620. Accumulate and store the number of primary hardware short-circuit protections.

[0121] S630. Record the reason for the release of the previous primary hardware short-circuit protection and the time interval between the current trigger of the primary hardware short-circuit and the previous trigger of the primary hardware short-circuit.

[0122] S640. Set the status value of the current "re-primary hardware short-circuit protection" to the first preset value.

[0123] Figure 7 The schematic diagram of the secondary hardware short-circuit protection process provided by the embodiment of the present invention is shown in Figure 7 , on the basis of the above embodiment, optionally, the secondary hardware short-circuit protection process includes:

[0124] S710. Record the number of secondary hardware short-circuit protections.

[0125] S720. Accumulate and store the number of secondary hardware short-circuit protections;

[0126] S730. Store the current of the battery pack before and after triggering the secondary hardware short - circuit protection.

[0127] S740. Set the current status value of the "secondary hardware short - circuit protection" to the first preset value.

[0128] Optionally, after controlling to enter the first - level hardware short - circuit protection process to control the battery pack to stop discharging according to the first level signal; or, after controlling to enter the secondary hardware short - circuit protection process to control the battery pack to stop discharging according to the second level signal, it further includes entering the short - circuit protection release processing flow.

[0129] Specifically, in some embodiments, after triggering the first - level hardware short - circuit protection to enter the first - level hardware short - circuit protection process for the first time or triggering the secondary hardware short - circuit protection to enter the secondary hardware short - circuit protection process, the short - circuit protection release process will be automatically entered. Figure 8 For the schematic diagram of the short - circuit protection release processing flow provided by the embodiments of the present invention, see Figure 8 , based on the above - mentioned embodiments, the short - circuit protection release processing flow includes:

[0130] S801. Obtain the current of the battery pack based on a preset period.

[0131] Among them, the preset period can be set in advance according to the acquisition requirements. Exemplarily, the preset period can be set to 100 ms. Specifically, the current of the battery pack is measured by the current measurement module based on the preset period.

[0132] S802. Determine whether there is a first - level hardware short - circuit protection; if so, execute S803; if not, execute S804.

[0133] S803. Determine whether there is a "first - time first - level hardware short - circuit protection"; if so, execute S805; if not, execute S806.

[0134] S804. Determine whether the status value of the "continuous first - level hardware short - circuit protection" is the first preset value; if so, execute S815; if not, return to execute S808.

[0135] S805. Enter the first - time first - level hardware short - circuit protection release process.

[0136] S806. Determine whether there is a "re - occurrence first - level hardware short - circuit protection"; if so, execute S807; if not, execute S808.

[0137] S807. Enter the re - occurrence first - level hardware short - circuit protection release process.

[0138] S808. Determine whether the status value of the "forced compatibility with high-power load flag" is a first preset value; if yes, execute S809; if no, execute S811.

[0139] S809: Accumulate time.

[0140] S810. Determine whether the duration of the "forced high-power load compatibility flag" is greater than a first preset time threshold; if yes, execute S811; if no, execute S812.

[0141] S811. Set the duration and the status value of the "forced compatibility with high-power load flag" to a second preset value.

[0142] The second preset value is set to 0 in this embodiment of the present invention for example.

[0143] S812. Determine whether "secondary hardware short circuit protection" exists; if yes, execute S813; if no, execute S814.

[0144] S813, enter the secondary hardware short circuit protection release process.

[0145] S814, exit the short-circuit protection release processing flow.

[0146] S815. Accumulate the time.

[0147] S816 determines whether the duration of "continuous first-level hardware short-circuit protection" is greater than the second preset time threshold; if yes, execute S817; if not, return to execute S808.

[0148] S817, setting the duration and the state value of "continuous first-level hardware short-circuit protection" to a second preset value.

[0149] Figure 9 The schematic diagram of the first-level hardware short-circuit protection release process provided by the embodiment of the present invention is shown in FIG. Figure 9 Based on the above embodiment, optionally, the first level hardware short circuit protection release process includes:

[0150] S910, accumulating the first triggering time of the first-level hardware short-circuit protection.

[0151] S920, determine whether the trigger time is greater than the third preset delay time; if yes, execute S930; if no, execute 940.

[0152] Among them, the third preset delay time is the release delay threshold for the first-level short-circuit protection. Once the first-level hardware short-circuit protection occurs, it takes at least a certain delay, such as 1 minute, to release the first-level hardware short-circuit protection. There is a minimum release time limit for the short-circuit protection to prevent the repeated release and triggering of the short-circuit protection, thus affecting the service life of the power device.

[0153] S930. Enter the battery pack connection status judgment process.

[0154] S940. Exit the first-level hardware short-circuit protection release process.

[0155] S950. Judge whether the connection status of the battery pack is "connected to a capacitive load", "charger connected", or "load removed"; if so, execute S960; if not, execute S970.

[0156] S960. Release the first-level hardware short-circuit protection and temporarily record the release reason and exit the first-level hardware short-circuit protection release process.

[0157] S970. Continue to maintain the protection status of the first-level hardware short-circuit protection and exit the first-level hardware short-circuit protection release process.

[0158] Figure 10 This is a schematic diagram of the release process for the second-level hardware short-circuit protection provided by the embodiment of the present invention. Refer to Figure 10 , on the basis of the above embodiment, optionally, the release process for the second-level hardware short-circuit protection includes:

[0159] S1010. Accumulate the trigger time of the second-level hardware short-circuit protection.

[0160] S1020. Judge whether the trigger time is greater than the fourth preset delay time; if so, execute S1030; if not, execute S1040.

[0161] S1030. Enter the battery pack connection status judgment process.

[0162] S1040. Exit the second-level hardware short-circuit protection release process.

[0163] S1050. Judge whether the connection status of the battery pack is "charger connected" or "load removed"; if so, execute S1060; if not, execute S1070.

[0164] S1060. Release the second-level hardware short-circuit protection and temporarily record the release reason and exit the second-level hardware short-circuit protection release process.

[0165] S1070. Continue to maintain the protection state of the secondary hardware short - circuit protection and exit the secondary hardware short - circuit protection release process.

[0166] Among them, the fourth preset delay time is the secondary hardware short - circuit protection release delay threshold. The fourth preset delay time is greater than the third preset delay time.

[0167] Figure 11 This is a schematic diagram of the secondary hardware short - circuit protection release process provided by an embodiment of the present invention. Refer to Figure 11 , based on the above - mentioned embodiment, optionally, the secondary hardware short - circuit protection release process includes:

[0168] S1110. Accumulate the trigger time of the secondary hardware short - circuit protection.

[0169] S1120. Determine whether the trigger time is greater than the fifth preset delay time; if so, execute S1130; if not, execute S1140.

[0170] S1130. Enter the battery pack connection state judgment process.

[0171] S1140. Exit the secondary hardware short - circuit protection release process.

[0172] S1150. Determine whether the connection state of the battery pack is "charger connected"; if so, execute S1160; if not, execute S1170.

[0173] S1160. Release the secondary hardware short - circuit protection and set the enable of the charging switch, then exit the secondary hardware short - circuit protection release process.

[0174] S1170. Continue to maintain the protection state of the secondary hardware short - circuit protection and exit the secondary hardware short - circuit protection release process.

[0175] Among them, the fifth preset delay time is the primary short - circuit protection release delay threshold, and the fifth preset delay time is greater than the fourth preset delay time.

[0176] Figure 12 This is a schematic diagram of the battery pack connection state judgment process provided by an embodiment of the present invention. Refer to Figure 12 , based on the above - mentioned embodiment, optionally, the battery pack connection state judgment process includes:

[0177] S1201. Measure the voltage of the battery pack.

[0178] S1202. Determine whether the voltage is the rated voltage of the battery pack; if so, execute S1203; if not, execute S1204.

[0179] If the voltage is the rated voltage of the battery pack, then

[0180] S1203. Determine that the connection status of the battery pack is "charger connected", and exit the battery pack connection status judgment process.

[0181] S1204. Determine whether the voltage is greater than 0 and less than the rated voltage; if so, execute S1205; if not, execute S1206.

[0182] S1205. Determine that the connection status of the battery pack is "connected capacitive load", and exit the battery pack connection status judgment process.

[0183] S1206. Determine whether the voltage is 0; if so, execute S1207; if not, execute S1211.

[0184] S1207. Turn on the pre-charge switch to charge the battery pack and continue to measure the voltage of the battery pack.

[0185] S1208. Determine whether the voltage increases; if so, execute S1209; if not, execute S1210.

[0186] S1209. Turn off the pre-charge switch and determine that the connection status of the battery pack is "load removed", and exit the battery pack connection status judgment process.

[0187] S1210. Turn off the pre-charge switch, the battery pack is in a continuous short-circuit state, and exit the battery pack connection status judgment process.

[0188] S1211. Report an error and exit the battery pack connection status judgment process.

[0189] In some alternative embodiments, if the high-power load still cannot be turned on normally under automatic adaptation, the battery pack can be manually controlled to enter the forced compatibility high-power load process, so as to meet the requirement of normal startup of the high-power load. Refer to Figure 13 , Figure 13 which is the schematic diagram of the forced compatibility high-power load process provided by the embodiment of the present invention. The forced compatibility high-power load process includes:

[0190] Determine whether a forced compatibility high-power load command is received.

[0191] If so, set the status value of the "forced compatibility high-power load flag" to the first preset value.

[0192] If not, exit the forced compatibility high-power load process.

[0193] Record the number of times the forced compatibility high-power load command is received, accumulate and store it, and then exit the forced compatibility high-power load process.

[0194] The technical solution provided by the embodiment of the present invention not only maximizes the balance between life and adaptability during the automatic adaptation process, but can also automatically release the short-circuit protection when the capacitive load is connected, so as to increase the delay of the second-level hardware short-circuit protection, and actively improve the adaptability to high-power loads; at the same time, if the high-power load still cannot be started normally during the automatic adaptation process, the battery pack can be manually controlled to enter the forced compatibility with the high-power load process, so as to meet the requirements of normal startup of the high-power load.

[0195] Figure 14 A schematic diagram of a device for starting a battery pack adapted to a high-power load according to an embodiment of the present invention is provided. Figure 14 The device includes a current measuring module 1410 , an operational amplifier module 1420 and a control module 1430 .

[0196] The current measurement module 1410 is used to measure the current of the battery pack.

[0197] The operational amplifier module 1420 is configured to generate a first level signal after a first preset delay time when the current is greater than a first preset current threshold.

[0198] The operational amplifier module 1420 is further configured to generate a second level signal after a second preset delay time when the current is greater than a second preset current threshold.

[0199] The control module 1430 is used for controlling the first level hardware short circuit protection process to stop discharging of the battery pack according to the first level signal.

[0200] The control module 1430 is further configured to control the entry into a secondary hardware short circuit protection process according to the second level signal to control the battery pack to stop discharging.

[0201] A device for adapting a battery pack to a high-power load and starting up provided in an embodiment of the present invention can execute a method for adapting a battery pack to a high-power load and starting up provided in any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the execution method.

[0202] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0203] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for a battery pack to adapt to the startup of a high-power load, characterized in that, include: Measure the current of the battery pack; When the current is greater than a first preset current threshold, a first level signal is generated after a first preset delay time; When the current is greater than a second preset current threshold, a second level signal is generated after a second preset delay time; According to the first level signal, control entering into the first level one hardware short circuit protection process to control the battery pack to stop discharging; According to the second level signal, the control enters the secondary hardware short circuit protection process to control the battery pack to stop discharging.

2. The method according to claim 1, wherein The first level one hardware short circuit protection process includes: Determine whether the state value of the "forced compatibility with high-power load flag" is a first preset value; If yes, then exit the first level one hardware short circuit protection process; if no, then determine whether the state value of "continuous level one hardware short circuit protection" is the first preset value; If yes, then enter the first-level hardware short-circuit protection process again; if no, then turn off the discharge switch and temporarily record the number of first-level hardware short-circuit protection times; Accumulating and storing the number of times of the first-level hardware short-circuit protection; The status values of "continuous first-level hardware short-circuit protection" and "first-level hardware short-circuit protection" are set to the first preset values.

3. The method according to claim 2, wherein The second level hardware short circuit protection process includes: Turn off the discharge switch to stop the battery pack from discharging; Accumulating and storing the number of times of the first-level hardware short-circuit protection; The reason why the last level 1 hardware short circuit protection was released and the time interval between the current triggering of the level 1 hardware short circuit and the last triggering of the level 1 hardware short circuit are recorded; The current state value of "second level hardware short circuit protection" is set to the first preset value.

4. The method according to claim 1, wherein The secondary hardware short circuit protection process includes: Record the number of secondary hardware short-circuit protection times; Accumulating and storing the secondary hardware short-circuit protection times; Storing the current of the battery pack before and after the secondary hardware short-circuit protection is triggered; The current status value of "secondary hardware short circuit protection" is set to the first preset value.

5. The method according to claim 1, characterized in that, After the control according to the first level signal enters the first level hardware short-circuit protection process to control the battery pack to stop discharging; or, according to the second level signal, controls the entry into the second level hardware short-circuit protection process to control the battery pack to stop discharging, it also includes entering the short-circuit protection release processing process. The short circuit protection release process includes: Obtaining the current of the battery pack based on a preset period; Determine whether the first-level hardware short-circuit protection exists; if the first-level hardware short-circuit protection exists, determine whether there is "first-time first-level hardware short-circuit protection"; if the first-level hardware short-circuit protection does not exist, determine whether the state value of "continuous first-level hardware short-circuit protection" is the first preset value; If there is "first level hardware short circuit protection", the process of releasing the first level hardware short circuit protection will be entered; if there is no "first level hardware short circuit protection", it will be determined whether there is "second level hardware short circuit protection"; If there is "second level hardware short circuit protection", the process of releasing the second level hardware short circuit protection is entered; if there is no "second level hardware short circuit protection", it is determined whether the state value of the "forced compatibility with high-power load flag" is the first preset value; If yes, then time accumulation is performed; Determine whether the duration of the "forced high-power load compatibility flag" is greater than a first preset time threshold; If it is greater than, setting the duration and the state value of the "forced compatibility with high-power load flag" to a second preset value; If not, determine whether there is "secondary hardware short circuit protection"; If there is "secondary hardware short circuit protection", enter the secondary hardware short circuit protection release process; If there is no "secondary hardware short-circuit protection", exit the short-circuit protection release process; If the status value of "continuous level one hardware short circuit protection" is the first preset value, then time accumulation is performed; if the status value of "continuous level one hardware short circuit protection" is not the first preset value, then return to determine whether the status value of "forced compatibility with high-power load flag" is the first preset value; Determine whether the duration of "continuous first-level hardware short-circuit protection" is greater than the second preset time threshold; if greater, set the duration and the status value of the "continuous first-level hardware short-circuit protection" to the second preset value, and return to determine whether the status value of the "forced compatibility with high-power load flag" is the first preset value.

6. The method according to claim 5, wherein The first level one hardware short circuit protection release process includes: Accumulate the triggering time of the first level hardware short-circuit protection; Determine whether the trigger time is greater than a third preset delay time; if yes, enter the battery pack connection status determination process; If not, then exit the first level one hardware short circuit protection release process; Determine whether the connection status of the battery pack is "capacitive load connected", "charger connected" or "load removed"; If yes, the first level one hardware short circuit protection is released, the release reason is temporarily recorded, and the first level one hardware short circuit protection release process is exited; If not, continue to maintain the protection state of the first level hardware short-circuit protection and exit the first level hardware short-circuit protection release process.

7. The method according to claim 5, wherein The second level hardware short circuit protection release process includes: Accumulating the triggering time of the second level hardware short circuit protection; Determine whether the trigger time is greater than a fourth preset delay time; if yes, enter the battery pack connection status determination process; If not, then exit the first-level hardware short-circuit protection release process; Determine whether the connection status of the battery pack is "charger connected" or "load removed"; If yes, the second level hardware short circuit protection is released, the release reason is temporarily recorded, and the second level hardware short circuit protection release process is exited; If not, continue to maintain the protection state of the second-level hardware short-circuit protection and exit the second-level hardware short-circuit protection release process.

8. The method according to claim 5, wherein The secondary hardware short circuit protection release process includes: Accumulating the triggering time of the secondary hardware short-circuit protection; Determine whether the trigger time is greater than a fifth preset delay time; if yes, enter the battery pack connection status determination process; If not, then exit the secondary hardware short circuit protection release process; Determine whether the connection status of the battery pack is "charger connected"; If yes, the secondary hardware short-circuit protection is released, the charging switch is enabled, and then the secondary hardware short-circuit protection release process is exited; If not, continue to maintain the protection state of the secondary hardware short-circuit protection and exit the secondary hardware short-circuit protection release process.

9. The method according to claim 6, wherein The battery pack connection status determination process includes: Measure the voltage of the battery pack; If the voltage is the rated voltage of the battery pack, determining that the connection state of the battery pack is "charger connected", and exiting the battery pack connection state determination process; If the voltage is greater than 0 and less than the rated voltage, the connection state of the battery pack is determined to be "connected capacitive load", and the battery pack connection state determination process is exited; If the voltage is 0, turning on the pre-charge switch to charge the battery pack and continuing to measure the voltage of the battery pack; If the voltage increases, the pre-charging switch is turned off and the connection state of the battery pack is determined to be "load removed", and the battery pack connection state determination process is exited; If the voltage is still zero, the pre-charge switch is turned off, the battery pack is in a continuous short-circuit state, and the battery pack connection state judgment process is exited.

10. A device for a battery pack to adapt to the startup of a high-power load, characterized in that, include: A current measurement module, wherein the current measurement module is used to measure the current of the battery pack; An operational amplifier module, the operational amplifier module being used for generating a first level signal after a first preset delay time when the current is greater than a first preset current threshold; The operational amplifier module is further configured to generate a second level signal after a second preset delay time when the current is greater than a second preset current threshold; A control module, the control module is used to control the first level hardware short circuit protection process to stop the battery pack from discharging according to the first level signal; The control module is further used to control entering into a secondary hardware short-circuit protection process according to the second level signal to control the battery pack to stop discharging.

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