CN114614123B - Electrochemical device, charging device and electronic equipment - Google Patents

Abstract

The application provides an electrochemical device, a charging device and electronic equipment. The electrochemical device is connected to a processor, and the processor is configured to: at a first moment, respond to the cumulative discharge capacity of the electrochemical device being discharged at a greater than a preset rate within a first time period greater than a first preset capacity, or respond to Adjusting the charging strategy of the electrochemical device when the discharge time of the electrochemical device is greater than the first preset rate within the first period of time. In this way, the safety problem of the electrochemical device caused by the conventional charging method can be improved when the electrochemical device is discharged under a high-rate working condition, thereby improving the stability and reliability of the electrochemical device.

Description

An electrochemical device, charging device and electronic equipment

technical field

The present application relates to the technical field of batteries, in particular, to an electrochemical device, a charging device and an electronic device.

Background technique

A battery is a device that can convert chemical energy into electrical energy. It has a metal electrode that extends into the electrolyte solution. The metal electrode has a positive pole and a negative pole. Batteries play an important role in all aspects of modern social life.

However, the inventor has found in practice that in some scenarios, after the battery is charged, some safety problems will occur, such as serious lithium precipitation in the battery, and the damaged SEI film (Solid Electrolyte Interface, solid electrolyte interface film) of the battery. ) cannot be repaired in time, or the cycle of the battery decays rapidly, etc.

Contents of the invention

The purpose of the embodiments of the present application is to provide an electrochemical device, a charging device and an electronic device, so as to improve the possible safety problems of the electrochemical device after charging, and improve the stability and reliability of the electrochemical device.

The present invention is achieved like this:

In a first aspect, an embodiment of the present application provides an electrochemical device, which is connected to a processor, and the processor is configured to: at a first moment, respond to the electrochemical device being greater than a preset rate within a first time period The cumulative discharge capacity of discharging at a lower rate is greater than a first preset capacity, or in response to the discharge time of the electrochemical device at a greater than a preset rate within a first period of time is greater than a first preset time length, adjusting the electrochemical device charging strategy.

In the embodiment of the present application, if the electrochemical device is discharged at a discharge rate greater than the preset rate during the discharge process, and the cumulative discharge capacity is greater than the first preset capacity, or is discharged at a discharge rate greater than the preset rate, and If the discharge duration is longer than the first preset duration, the charging strategy of the electrochemical device is adjusted. In this way, the safety problem of the electrochemical device caused by the conventional charging method can be improved when the electrochemical device is discharged under a high-rate working condition, thereby improving the stability and reliability of the electrochemical device.

In combination with the technical solution provided in the first aspect above, in some possible implementations, the adjusting the charging strategy of the electrochemical device includes at least one of the following operations: reducing the charging upper limit voltage of the electrochemical device; reducing The charging current of the electrochemical device; reducing the cut-off protection temperature of the electrochemical device. By reducing the charging upper limit voltage of the electrochemical device, reducing the charging current of the electrochemical device or reducing the cut-off protection temperature of the electrochemical device, the safety risk of the electrochemical device after high-rate discharge can be effectively reduced when charging.

In combination with the technical solution provided in the first aspect above, in some possible implementations, after adjusting the charging strategy of the electrochemical device, the processor is further configured to: at a second moment after the first moment , in response to the cumulative discharge capacity of the electrochemical device being discharged at a rate greater than the preset rate within a second period of time being greater than a second preset capacity, or in response to the electrochemical device being greater than the preset rate within a second period of time If the duration of discharging at the preset rate is longer than the second preset duration, the charging strategy of the electrochemical device is adjusted. That is, after the charging strategy of the electrochemical device is adjusted once, the processor can continue to adjust the charging strategy of the electrochemical device according to the discharge situation of the electrochemical device under high-rate working conditions, so that the charging strategy of the electrochemical device is consistent with the charging strategy of the electrochemical device. The chemical device is matched with the high-rate working conditions during the complete discharge process before charging, which can further improve the safety and sustainability of the electrochemical device throughout its life cycle.

In combination with the technical solution provided in the first aspect above, in some possible implementations, the second preset capacity is smaller than the first preset capacity, or the second preset duration is shorter than the first preset duration . That is, by setting the second preset capacity to be smaller than the first preset capacity, or the second preset duration to be shorter than the first preset duration, the electrochemical device can be charged continuously during the high-rate discharge process. The ever-increasing frequency of strategy adjustments can further improve the safety and sustainability of electrochemical devices throughout their lifecycles.

In combination with the technical solution provided in the first aspect above, in some possible implementations, the processor is further configured to perform at least one of the following operations: when the charging upper limit voltage of the electrochemical device drops to a preset voltage, stop adjusting the charging upper limit voltage of the electrochemical device; stop adjusting the charging current of the electrochemical device when the charging current of the electrochemical device drops to a preset current; When the cut-off protection temperature drops to the preset temperature, the adjustment of the cut-off protection temperature of the electrochemical device is stopped. By setting the adjustment cut-off condition, the unlimited adjustment of the charging strategy is avoided from affecting the charging process of the electrochemical device, thereby ensuring that the electrochemical device can be charged under reasonable and reliable charging conditions.

In combination with the technical solution provided in the first aspect above, in some possible implementation manners, the processor is further configured to: trigger a timer to start timing when the discharge rate of the electrochemical device is greater than the preset rate; When the discharge rate of the electrochemical device is less than the preset rate, trigger the timer to stop counting; obtain the first cumulative duration of the timer; wherein, the first cumulative duration is the electrochemical device The duration of discharging at a rate greater than the preset rate. The timer is used to effectively monitor the discharge duration, or the timer is used to effectively monitor the discharge duration, and then it is convenient to calculate the cumulative discharge capacity of the electrochemical device discharged at a rate greater than a preset rate within the first time period.

In combination with the technical solution provided in the first aspect above, in some possible implementations, after adjusting the charging strategy of the electrochemical device, the processor is further configured to: determine whether the discharge rate of the electrochemical device reaches The preset rate; when the discharge rate of the electrochemical device is greater than the preset rate, trigger the timer to restart counting; when the discharge rate of the electrochemical device is less than the preset rate, trigger The timer stops counting; acquiring a second cumulative duration of the timer; wherein, the second cumulative duration is after adjusting the charging strategy of the electrochemical device, and the electrochemical device is greater than the predetermined The duration of discharging at a set rate; based on the second cumulative duration, determine whether to continue adjusting the charging strategy of the electrochemical device. That is, each time the charging strategy of the electrochemical device is adjusted, the timer counts again. In this way, it is convenient to directly determine whether the charging strategy of the electrochemical device needs to be adjusted in the current discharge stage according to the accumulated time of the timer.

In combination with the technical solution provided in the first aspect above, in some possible implementations, after adjusting the charging strategy of the electrochemical device, the processor is further configured to: determine whether the discharge rate of the electrochemical device reaches The preset rate; when the discharge rate of the electrochemical device is greater than the preset rate, trigger the timer to continue counting; when the discharge rate of the electrochemical device is less than the preset rate, trigger the timer The timer stops timing; acquire the third cumulative duration of the timer; wherein, the third cumulative duration is after adjusting the charging strategy of the electrochemical device, and the electrochemical device is greater than the preset The duration of discharging at the rate; based on the third cumulative duration, it is determined whether it is necessary to continue to adjust the charging strategy of the electrochemical device. That is, after each adjustment of the charging strategy of the electrochemical device, the timer will continue to count when the discharge rate of the electrochemical device is greater than the preset rate. greater than the total duration of discharge at the preset rate.

In a second aspect, an embodiment of the present application provides a charging device, the charging device is connected to the electrochemical device provided in the embodiment of the first aspect above, and the charging device is used for charging the electrochemical device.

In a third aspect, the embodiment of the present application provides an electronic device, including an electrochemical device and a processor; the electrochemical device is connected to the processor; the processor is configured to: at a first moment, respond to the The cumulative discharge capacity of the electrochemical device discharged at a rate greater than a preset rate within a first period of time is greater than the first preset capacity, or in response to the fact that the electrochemical device is discharged at a rate greater than a preset rate within a first period of time If the duration is longer than the first preset duration, the charging strategy of the electrochemical device is adjusted.

In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium on which a computer program is stored, and when the computer program is run by a processor, the method configured by the processor in the embodiment of the first aspect above is executed. .

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings that need to be used in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, so It should not be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings according to these drawings without creative work.

FIG. 1 is a module block diagram of an electronic device provided by an embodiment of the present application.

Fig. 2 is a flowchart of steps of a method for adjusting a charging strategy provided by an embodiment of the present application.

FIG. 3 is a flow chart of steps in another method for adjusting a charging strategy provided by an embodiment of the present application.

Icons: 100 - electronic equipment; 110 - electrochemical device; 120 - processor.

Detailed ways

Embodiments of the technical solutions of the present application will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present application more clearly, and therefore are only examples, rather than limiting the protection scope of the present application.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the application; the terms used herein are only for the purpose of describing specific embodiments, and are not intended to Limiting the application; the terms "comprising" and "having" and any variations thereof in the description and claims of this application are intended to cover a non-exclusive inclusion.

In the description of the embodiments of the present application, the technical terms "first", "second" and so on are only used to distinguish different objects, and should not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features, A specific order or primary-secondary relationship.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiment of the present application, the term "and/or" is only a kind of association relationship describing associated objects, which means that there may be three kinds of relationships, such as A and/or B, which may mean: A exists alone, and A exists at the same time and B, there are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

In the description of the embodiments of the present application, the term "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more groups (including two).

In the description of the embodiments of this application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a fixed connection. Disassembled connection, or integration; it can also be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present application according to specific situations.

Judging from the development of the current market situation, the application of batteries is becoming more and more extensive. Batteries can be used not only in basic tools, such as chainsaws, electric drills, etc., but also in energy storage power systems such as water power, fire power, wind power and solar power stations. In recent years, batteries are also widely used in electric vehicles such as electric bicycles and electric vehicles. With the continuous expansion of battery application fields, its market demand is also constantly expanding.

The inventor of the present application has noticed that in some scenarios, after the battery is charged, some safety problems will occur, such as serious lithium deposition in the battery, the damaged SEI film of the battery cannot be repaired in time, or the cycle of the battery decays rapidly, etc. .

In view of the above problems, the inventor found after long-term research that the actual working conditions of some electric products are often uncertain, that is, non-constant current and constant power discharge. Therefore, there is a demand for peak discharge in this type of product, such as the working condition of an electric vehicle when it accelerates and starts instantaneously, or when an electric drill stalls and requires instantaneous high-rate discharge. However, after the battery is discharged at a high rate, it will cause certain damage to the battery, and the more times the battery is discharged at a high rate and the longer the duration, the greater the damage caused by the battery. Damage to the battery includes but is not limited to continuous exposure to high temperature of the battery, increased side reactions of the battery, broken active material particles inside the battery and destruction of the SEI film. However, if a battery that has been discharged at a high rate is charged according to a conventional charging method, the above-mentioned safety problems will occur.

In view of the above problems, the inventors of the present application propose the following embodiments to solve the above problems.

Referring to FIG. 1 , the embodiment of the present application provides an electronic device 100 .

The electronic device 100 includes an electrochemical device 110 and a processor 120 . The electrochemical device 110 is connected to a processor 120 .

Wherein, the electronic device 100 includes, but is not limited to, a notebook computer, a mobile terminal, a game machine, an electric drill, a chainsaw, an electric vehicle, an electric bicycle, and the like. Electrochemical devices 110 include, but are not limited to, lithium batteries, nickel metal hydride batteries, lead-acid batteries, and the like. Wherein, the processor 120 may be an integrated circuit chip with signal processing capabilities. The processor 120 can also be a general-purpose processor, for example, can be a central processing unit (Central Processing Unit, CPU), a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a discrete gate Or transistor logic devices, discrete hardware components, can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. In addition, when the electronic device 100 is an electric vehicle, the above-mentioned processor 120 may be a control module in a battery management system (Battery Management System, BMS) configured in the electric vehicle, or may be a control module in a charging management system configured in the electric vehicle. The control module is not limited in this application.

It should be noted that the structure shown in FIG. 1 is only for illustration, and the electronic device 100 provided in the embodiment of the present application may also have fewer or more components than that shown in FIG. 1 , or have a configuration different from that shown in FIG. 1 . In addition, each component shown in FIG. 1 may be realized by software, hardware or a combination thereof.

Please refer to FIG. 2 , an embodiment of the present application provides a charging strategy adjustment method, the method is configured in the above-mentioned processor, and the method specifically includes: at the first moment, in response to the electrochemical device being greater than the preset value within the first time period The cumulative discharge capacity of discharging at the rate is greater than the first preset capacity, or the charging strategy of the electrochemical device is adjusted in response to the discharge time of the electrochemical device at a rate greater than the preset rate within the first time period is greater than the first preset time length .

It should be noted that the above-mentioned preset rate is the critical value of the high rate discharge of the electrochemical device. Different manufacturers and different types of batteries have different standards for high discharge rates. For example, for A battery, the standard for high rate discharge is Discharge with a discharge rate greater than 5C (discharge rate refers to the current value required for the battery to release its rated capacity within a specified time, which is equal to the multiple of the battery’s rated capacity in terms of data value, usually represented by the letter C). For battery B, the standard for high-rate discharge is to use a discharge rate greater than 10C for discharge, so the specific value of the preset rate can be set according to different manufacturers or different types of batteries. Of course, the preset rate can also be determined according to the extreme discharge conditions of the product. For example, the discharge rate when the electric vehicle is accelerated and started instantaneously is used as the preset rate, or the instantaneous high rate when the electric drill is locked is used as the preset rate. In addition, the preset rate The magnification ratio may also be obtained through experiments according to requirements, which is not limited in this application.

The first preset capacity and the first preset duration can be set according to actual needs. The first preset capacity can be a specific value, such as 50 mA, or a proportional value, such as 5%. Wherein, the first preset capacity is 5%, which means 5% of the actual capacity of the first preset capacity electrochemical device.

The first preset duration includes but is not limited to 2 seconds, 5 seconds, etc., which is not limited in this application.

That is, during the discharge process of the electrochemical device, the processor is configured to monitor the discharge condition of the electrochemical device, and then adaptively adjust the subsequent discharge conditions of the electrochemical device according to the condition of the electrochemical device at a high rate. charging strategy.

As the first adjustment method, the processor continuously collects the discharge rate of the electrochemical device, and when the discharge rate of the electrochemical device is greater than the preset rate, obtains the discharge time of the electrochemical device at a rate greater than the preset rate, and based on the time length Calculate the cumulative discharge capacity of the electrochemical device when it is discharged at a rate greater than the preset rate. If the cumulative discharge capacity is greater than the first preset capacity, the processor responds to the electrochemical device at the current moment (that is, the first moment) during this period of time. If the accumulative discharge capacity of discharging at a rate greater than a preset rate within a period (first time period) is greater than the first preset capacity, adjust the charging strategy of the electrochemical device.

It should be noted that the discharge rate refers to the current value required by the battery to discharge its rated capacity within a specified time. It is equal to the multiple of the rated capacity of the battery in terms of data value, and is usually represented by the letter C. It indicates how many times the capacity of the rechargeable battery is discharged. For example, a Ni-MH battery with a capacity of 2300 mAh is "discharged at a discharge rate of 0.1C", that is, the discharge current I = 230 mA. Therefore, after the discharge current is determined by the discharge rate, the cumulative discharge capacity of the electrochemical device discharged at a rate greater than a preset rate can be calculated according to the calculation formula: discharge capacity=discharge current×discharge duration.

Exemplarily, it is assumed that the preset rate is 5C, and the first preset capacity is 50 mAh. The processor continuously collects the discharge rate of the electrochemical device, and when the discharge rate of the electrochemical device is greater than 5C, obtains the discharge time of the electrochemical device at a rate greater than the preset rate, and calculates the discharge rate of the electrochemical device at a rate greater than the preset rate based on the time length. If the accumulated discharge capacity is greater than 50 mAh, the processor adjusts the charging strategy of the electrochemical device at this time.

It should be noted that if the discharge rate is not constant under the premise that the discharge rate is greater than the preset rate, then when calculating the discharge capacity, it is necessary to determine the corresponding discharge current according to different discharge rates, and then multiply the determined discharge current by According to the corresponding discharge time length, the discharge capacity in each time period of discharge at different discharge rates is obtained, and finally all the discharge capacities can be accumulated.

Since the cumulative capacity of the electrochemical device using high-rate discharge is greater, the damage to the electrochemical device is also greater. Therefore, in the embodiment of the present application, by setting the first preset capacity, the processor can monitor When the accumulated capacity of the electrochemical device using high-rate discharge reaches the first preset capacity, the charging strategy of the electrochemical device is adjusted in time, so that the electrochemical device is charged with a safer charging strategy and the stability of the electrochemical device is improved. and reliability.

As the second adjustment method, the processor continuously collects the discharge rate of the electrochemical device, and when the discharge rate of the electrochemical device is greater than the preset rate, obtains the discharge time of the electrochemical device at a rate greater than the preset rate, and then judges the duration Whether it is greater than the first preset duration. When the duration is greater than the first preset duration, the processor responds at the current moment (that is, the first moment) in response to the discharge duration of the electrochemical device being greater than the preset rate within this period of time (the first time period) is greater than In the case of the first preset duration, the charging strategy of the electrochemical device is adjusted.

Exemplarily, it is assumed that the preset magnification is 5C, and the first preset duration is 10 seconds. The processor continuously collects the discharge rate of the electrochemical device, and when the discharge rate of the electrochemical device is greater than 5C, obtains the discharge time of the electrochemical device at a rate greater than a preset rate, and then determines whether the time is greater than 10 seconds. When the duration is greater than 10 seconds, the processor adjusts the charging strategy of the electrochemical device at this time.

Because the longer the discharge time of the electrochemical device using high-rate discharge, the greater the damage to the electrochemical device. Therefore, in the embodiment of the present application, by setting the first preset time length, the processor can be monitored. When the high-rate discharge time of the electrochemical device reaches the first preset time, the charging strategy of the electrochemical device is adjusted in time, so that the electrochemical device is charged with a safer charging strategy, and the stability and reliability of the electrochemical device are improved. sex.

To sum up, in the embodiment of the present application, if the electrochemical device is discharged at a discharge rate greater than the preset rate during the discharge process, and the cumulative discharge capacity is greater than the first preset capacity, or the discharge rate is greater than the preset rate The rate is discharged, and the discharge time is longer than the first preset time, then the charging strategy of the electrochemical device is adjusted. In this way, the safety problem of the electrochemical device caused by the conventional charging method can be improved when the electrochemical device is discharged under a high-rate working condition, thereby improving the stability and reliability of the electrochemical device.

In one embodiment, the aforementioned strategy for adjusting the charging of the electrochemical device may be to reduce the charging upper limit voltage of the electrochemical device.

Among them, the specific value of the reduction of the charging upper limit voltage can be set according to the needs. For example, adjusting the charging strategy of the electrochemical device can be specifically reduced by 0.05 volts. To reduce the charging upper limit voltage of the electrochemical device by 0.1 volts.

Of course, the method of adjusting the charging upper limit voltage may also be to reduce the charging upper limit voltage of the electrochemical device to 90% of the original charging upper limit voltage, which is not limited in this application.

It should be noted that after the electrochemical device has been discharged at a high rate, in order to avoid the secondary impact of high-voltage charging on the electrochemical device, the charging upper limit voltage of the electrochemical device is lowered to maintain the health of the electrochemical device.

In another embodiment, the aforementioned strategy for adjusting the charging of the electrochemical device may be to reduce the charging current of the electrochemical device.

Among them, the specific value of the reduction of the charging current can be set according to the needs. For example, adjusting the charging strategy of the electrochemical device can be specifically to reduce the charging current of the electrochemical device by 0.1 ampere. Another example is to adjust the charging strategy of the electrochemical device. The charging current of the electrochemical device was reduced by 1 amp.

Of course, the charging current can also be adjusted by reducing the charging current of the electrochemical device to 80% of the initial charging current, which is not limited in this application.

It should be noted that after the electrochemical device has been discharged at a high rate, in order to avoid the secondary impact of the high rate charge on the electrochemical device, the charging current of the electrochemical device is reduced to maintain the health of the electrochemical device.

In yet another embodiment, the aforementioned strategy for adjusting the charging of the electrochemical device may be to lower the cut-off protection temperature of the electrochemical device.

It should be noted that the cut-off protection temperature of the electrochemical device represents a temperature limit during the working process of the electrochemical device, and when the temperature of the electrochemical device reaches the cut-off protection temperature, the use of the electrochemical device will be limited. Therefore, after the electrochemical device is discharged at a high rate, in order to avoid the secondary impact of high-temperature charging on the electrochemical device, the cut-off protection temperature of the electrochemical device is lowered to maintain the health of the electrochemical device.

Among them, the cut-off protection temperature of the electrochemical device can also be set according to requirements. For example, adjusting the charging strategy of the electrochemical device can be specifically to reduce the cut-off protection temperature of the electrochemical device by 5 degrees Celsius. For example, adjusting the charging strategy of the electrochemical device can be Specifically, the cut-off protection temperature of the electrochemical device is lowered by 3 degrees Celsius.

In addition, in other embodiments, adjusting the charging strategy of the electrochemical device may also include any two of the above three adjustment methods, and adjusting the charging strategy of the electrochemical device may also include the above three adjustment methods at the same time, which is not limited in this application.

It can be seen that by reducing the charging upper limit voltage of the electrochemical device, reducing the charging current of the electrochemical device or reducing the cut-off protection temperature of the electrochemical device, the safety risk of the electrochemical device after high-rate discharge can be effectively reduced when charging.

The charging strategy adjustment method described above may be configured to be adjusted only once, that is, when the processor responds at the first moment that the accumulative discharge capacity of the electrochemical device discharged at a greater than a preset rate within a first time period is greater than the first preset Capacity, or in response to the discharge time of the electrochemical device at a rate greater than the preset rate within the first time period is longer than the first preset time period, after adjusting the charging strategy of the electrochemical device, the processor will no longer charge the electrochemical device Monitor discharge conditions. Correspondingly, the processor will no longer adjust the charging strategy of the electrochemical device.

Certainly, the charging strategy adjustment method described above may also be configured as continuous adjustment, that is, after adjusting the charging strategy of the electrochemical device, the processor is further configured to: at a second moment after the first moment, in response to the electrochemical device being The cumulative discharge capacity of discharging at a rate greater than a preset rate within a second period of time is greater than a second preset capacity, or in response to the discharge time of the electrochemical device being discharged at a rate greater than a preset rate within a second period of time greater than a second preset period of time , to adjust the charging strategy of the electrochemical device.

The above-mentioned preset magnification can refer to the description in the foregoing embodiment, the second preset capacity and the second preset duration can also be set according to actual needs, and the second preset capacity can be a specific value, such as 50 milliampere hours , can also be a proportional value, such as 5%. Wherein, the second preset capacity is 5%, which means 5% of the actual capacity of the electrochemical device. The second preset duration includes but is not limited to 2 seconds, 5 seconds, etc., which is not limited in this application.

In an embodiment, the subsequent charging strategy adjustment process may be configured with the same adjustment condition, that is, the second preset capacity is equal to the first preset capacity, and the second preset duration is equal to the first preset duration.

In another embodiment, the subsequent charging strategy adjustment process may be configured with different adjustment conditions, specifically, the second preset capacity is smaller than the first preset capacity, or the second preset duration is shorter than the first preset duration.

Exemplarily, the first preset capacity is 50 mAh, and the second preset capacity is 30 mAh. Then, when the electrochemical device adopts high-rate discharge to reach a cumulative discharge capacity of 50 mAh, the charging strategy is adjusted for the first time. After the first adjustment of the charging strategy of the electrochemical device, the second adjustment of the charging strategy is performed when the cumulative discharge capacity of 30 mAh is reached in the next high-rate discharge.

That is, by setting the second preset capacity to be smaller than the first preset capacity, or the second preset duration to be shorter than the first preset duration, the electrochemical device can be charged continuously during the high-rate discharge process. The ever-increasing frequency of strategy adjustments can further improve the safety and sustainability of electrochemical devices throughout their lifecycles.

When the above charging strategy adjustment method is configured as continuous adjustment, the processor will continue to monitor the discharge condition of the electrochemical device after one adjustment of the electrochemical device, and then according to the electrochemical device under the high-rate working condition Adaptively adjust the subsequent charging strategy for the electrochemical device.

Exemplarily, as a first adjustment method, the processor adjusts the electrochemical device at the first moment in response to the fact that the cumulative discharge capacity of the electrochemical device discharged at a greater than a preset rate within a first time period is greater than the first preset capacity. After the charging strategy of the device, it will continue to collect the discharge rate of the electrochemical device. When the discharge rate of the electrochemical device is greater than the preset rate, obtain the discharge time of the electrochemical device at a rate greater than the preset rate, and calculate the discharge rate based on this time. The cumulative discharge capacity of the chemical device discharged at a rate greater than the preset rate, if the cumulative discharge capacity is greater than the second preset capacity, the processor responds to the electrochemical device at the current moment (that is, the second moment) during this period ( If the accumulative discharge capacity of discharging at the preset rate within the second time period is greater than the second preset capacity, continue to adjust the charging strategy of the electrochemical device.

At this time, adjusting the charging strategy of the electrochemical device may also include at least one of the following operations: reducing the charging upper limit voltage of the electrochemical device; reducing the charging current of the electrochemical device; reducing the cut-off protection temperature of the electrochemical device.

Exemplarily, as the second adjustment mode, the processor adjusts the electrochemical device at the first moment in response to the discharge time of the electrochemical device at a greater than a preset rate within the first time period being greater than the first preset time length. After the charging strategy, the discharge rate of the electrochemical device will continue to be collected. When the discharge rate of the electrochemical device is greater than the preset rate, the duration of the discharge of the electrochemical device at the preset rate is obtained, and then it is judged whether the duration is greater than the second Default duration. When the duration is greater than the second preset duration, the processor responds at the current moment (that is, the second moment) in response to the discharge duration of the electrochemical device being greater than the preset rate within this period of time (second time period) is greater than In the case of the second preset duration, the charging strategy of the electrochemical device is adjusted.

Since the two adjustment methods here (adjustment based on cumulative discharge capacity and adjustment based on cumulative discharge duration) are basically the same as the implementation process of the two adjustment methods in the foregoing embodiments, in order to avoid redundancy, no adjustment is made for these two adjustment methods. Repeat, the same parts can be referred to each other.

Optionally, the adjustment manners configured by the processors may be unified, or may be crossed. For example, using a unified method, the processor can adjust the charging strategy of the electrochemical device according to the cumulative discharge capacity of the electrochemical device at high rates, that is, each adjustment will determine the accumulated discharge capacity of the electrochemical device at high rates. discharge capacity. If the crossover method is used, the processor can first adjust the charging strategy of the electrochemical device through the cumulative discharge capacity of the electrochemical device at a high rate, and then adjust the electrochemical device's charging strategy through the cumulative discharge time of the electrochemical device at a high rate. The charging strategy of the device. That is, the processor may adjust the charging strategy of the electrochemical device at the first moment in response to the cumulative discharge capacity of the electrochemical device discharged at a greater than a preset rate within a first time period being greater than the first preset capacity, and then at the first time At a second moment after the first moment, the charging strategy of the electrochemical device is adjusted in response to the discharge time of the electrochemical device at a rate greater than a preset rate within a second time period being longer than a second preset time period.

Since the charging strategy adjustment method described above is configured for continuous adjustment, after the processor adjusts the charging strategy of the electrochemical device for the second time, it is also configured to: at a third time after the second time, respond to the electrochemical device at the The cumulative discharge capacity of discharging at a rate greater than a preset rate within the three time periods is greater than a third preset capacity, or in response to the discharge time of the electrochemical device being discharged at a rate greater than a preset rate within a third time period greater than a third preset time length, Tuning charging strategies for electrochemical devices.

Wherein, the third preset capacity and the third preset duration can be set according to actual needs, and the third preset capacity can be a specific value, such as 50 mA, or a proportional value, such as 5%. Wherein, the third preset capacity is 5%, representing 5% of the actual capacity of the electrochemical device. The third preset duration includes but is not limited to 1 second, 2 seconds, etc., which is not limited in this application.

Wherein, the subsequent charging strategy adjustment process can be configured with the same adjustment condition, that is, the third preset capacity is equal to the first preset capacity and the second preset capacity, and the third preset duration is equal to the first preset duration and the second preset duration. The preset durations are equal. In addition, the subsequent charging strategy adjustment process may be configured with different adjustment conditions, specifically, the third preset capacity is smaller than the second preset capacity, or the third preset duration is shorter than the second preset duration.

Since the subsequent adjustment process is basically the same as the adjustment process in the foregoing embodiments, in order to avoid redundancy, it is not repeated here, and the same parts can be referred to each other.

In summary, after the electrochemical device has been adjusted for a charging strategy, the processor can continue to adjust the charging strategy of the electrochemical device according to the discharge status of the electrochemical device under high-rate conditions, so that the charging of the electrochemical device The strategy matches the high-rate working conditions of the electrochemical device during the complete discharge process before charging, which can further improve the safety and sustainability of the electrochemical device throughout its life cycle.

In addition, in order to prevent the unlimited adjustment of the charging strategy from affecting the charging process of the electrochemical device and ensure that the electrochemical device can be charged under reasonable and reliable charging conditions, the processor is also configured to perform at least one of the following operations: when the electrochemical device When the charging upper limit voltage of the device drops to the preset voltage, stop adjusting the charging upper limit voltage of the electrochemical device; when the charging current of the electrochemical device drops to the preset current, stop adjusting the charging current of the electrochemical device; When the cut-off protection temperature of the electrochemical device drops to a preset temperature, the adjustment of the cut-off protection temperature of the electrochemical device is stopped.

That is, the unlimited adjustment of the charging strategy is avoided by setting the adjustment cut-off condition. Wherein, the preset voltage, preset current, and preset temperature mentioned above can be set according to different types of electrochemical devices, which are not limited in this application.

In addition, when the processor adjusts the charging strategy of the electrochemical device to be configured with at least two operations, when any one of the adjustment operations reaches the set adjustment cut-off condition, then stop adjusting the charging strategy of the electrochemical device.

Exemplarily, when the processor adjusts the charging strategy of the electrochemical device and is configured to lower the charging upper limit voltage of the electrochemical device and lower the charging current of the electrochemical device, then when the charging upper limit voltage drops to a preset voltage or when the charging current drops to When the current is preset, the adjustment of the charging strategy is stopped.

Optionally, the processor obtains the duration of the discharge of the electrochemical device at a rate greater than a preset rate by means of a timer. That is, the processor is also configured to: when the discharge rate of the electrochemical device is greater than the preset rate, the trigger timer starts timing; when the discharge rate of the electrochemical device is less than the preset rate, the trigger timer stops timing; obtain the timer The first cumulative time length; wherein, the first cumulative time length is the time when the electrochemical device discharges at a rate greater than a preset rate.

In the embodiment of the present application, the timer is used to effectively monitor the discharge duration, or the timer is used to effectively monitor the discharge duration, and then it is convenient to calculate that the electrochemical device is greater than the preset rate within the first time period. Cumulative discharge capacity for discharge.

In one embodiment, after adjusting the charging strategy of the electrochemical device, the processor is further configured to: determine whether the discharge rate of the electrochemical device reaches the preset rate; when the discharge rate of the electrochemical device is greater than the preset rate, The trigger timer restarts timing; when the discharge rate of the electrochemical device is less than the preset rate, the trigger timer stops counting; the second cumulative duration of the timer is acquired; wherein, the second cumulative duration is adjusting the charging strategy of the electrochemical device Afterwards, and the duration of discharge of the electrochemical device is greater than the preset rate; based on the second cumulative duration, it is determined whether it is necessary to continue to adjust the charging strategy of the electrochemical device.

Wherein, the above-mentioned determining whether to continue to adjust the charging strategy of the electrochemical device based on the second cumulative time length includes: calculating the cumulative discharge capacity of the electrochemical device when discharging at a rate greater than a preset rate based on the second cumulative time length, and based on the cumulative discharge capacity, determine whether to continue to adjust the charging strategy of the electrochemical device; and determine whether to continue to adjust the charging strategy of the electrochemical device based on the comparison result of the second accumulated time length and the second preset time length.

Since the above two adjustment methods have been described in the foregoing embodiments, they will not be repeated here, and the same parts can be referred to each other.

Exemplarily, after the processor adjusts the charging strategy of the electrochemical device once, the timer is cleared. At this time, the processor continues to collect the discharge rate of the electrochemical device. When the discharge rate of the electrochemical device is greater than the preset rate, the timing The timer starts counting again from zero, and when the discharge rate of the electrochemical device is less than the preset rate, the timer stops counting, and then directly obtains the second accumulated duration of the timer, so as to determine whether to continue to adjust the charging strategy of the electrochemical device.

It can be seen that in this embodiment, each time the charging strategy of the electrochemical device is adjusted, the timer will be counted again. In this way, it is convenient to directly determine whether the electrochemical device needs to be adjusted in the current discharge stage according to the accumulated duration of the timer. charging strategy.

In yet another embodiment, the processor is further configured to: determine whether the discharge rate of the electrochemical device reaches a preset rate; when the discharge rate of the electrochemical device is greater than the preset rate, trigger the timer to continue counting; when the discharge rate of the electrochemical device When the discharge rate is less than the preset rate, trigger the timer to stop counting; obtain the third cumulative duration of the timer; wherein, the third cumulative duration is after adjusting the charging strategy of the electrochemical device, and the electrochemical device is greater than the preset The duration of discharging at the rate; based on the third cumulative duration, it is determined whether it is necessary to continue to adjust the charging strategy of the electrochemical device.

Wherein, the above-mentioned determining whether to continue adjusting the charging strategy of the electrochemical device based on the third cumulative time length includes: calculating the cumulative discharge capacity of the electrochemical device discharged at a rate greater than a preset rate based on the third cumulative time length, and based on the cumulative discharge capacity, determine whether to continue to adjust the charging strategy of the electrochemical device; and determine whether to continue to adjust the charging strategy of the electrochemical device based on the comparison result of the third accumulated time length and the second preset time length.

Since the above two adjustment methods have been described in the foregoing embodiments, they will not be repeated here, and the same parts can be referred to each other.

Exemplarily, after the processor adjusts the charging strategy of the electrochemical device once, the timer continues to maintain the current count, and the processor continues to collect the discharge rate of the electrochemical device at this time, when the discharge rate of the electrochemical device is greater than the preset rate , the timer continues to count. When the discharge rate of the electrochemical device is less than the preset rate, the timer stops counting, and then obtains the third accumulated duration of the timer. It should be noted that the third accumulated duration is the total accumulated time of the current timer. The duration minus the total duration accumulated by the timer when the processor adjusted the charging strategy of the electrochemical device last time. Finally, it is determined whether it is necessary to continue adjusting the charging strategy of the electrochemical device based on the third accumulated time length.

It can be seen that in this embodiment, after each adjustment of the charging strategy of the electrochemical device, the timer will continue to count when the discharge rate of the electrochemical device is greater than the preset rate. During the entire discharge process, the total duration of discharge at a rate greater than the preset rate.

Referring to FIG. 3 , a complete example is used below to illustrate a method for adjusting a charging strategy provided by an embodiment of the present application. During the discharge process of the electrochemical device, the processor obtains the discharge rate of the electrochemical device during the discharge process at this time, and then judges whether the discharge rate is greater than the preset threshold, and if the discharge rate is greater than the preset threshold, the timer is triggered to start counting . If the discharge rate is less than the preset threshold value, no processing is performed, and the discharge rate of the electrochemical device during the discharge process is continued to be acquired, and if the discharge rate of the electrochemical device is less than the preset threshold value after the trigger timer starts, then stop Timing of the timer. After the timer starts counting, the cumulative discharge capacity of the electrochemical device is calculated based on the time accumulated by the timer. Then it is judged whether the accumulated discharge capacity is greater than the first preset capacity. If the cumulative discharge capacity is greater than the first preset capacity, adjust the charging strategy of the electrochemical device, such as lowering the charging upper limit voltage of the electrochemical device, reducing the charging current of the electrochemical device, or lowering the cut-off protection temperature of the electrochemical device. If the accumulated discharge capacity is less than the first preset capacity, no processing is performed, and it is determined whether the timer needs to be triggered to count according to the discharge condition of the electrochemical device. After the charging strategy of the electrochemical device is adjusted once, the timer is reset, and the adjustment is performed according to the above steps again. Wherein, when the charging upper limit voltage of the electrochemical device is lowered to a preset voltage, when the charging current of the electrochemical device is lowered to a preset current, or when the cut-off protection temperature of the electrochemical device is lowered to a preset temperature, the charging of the battery is stopped. The charging strategy of the chemical device is adjusted.

Based on the same inventive concept, an embodiment of the present application further provides a charging device. The charging device is connected to the electrochemical device in the above-mentioned embodiment. The charging device is used for charging the electrochemical device.

Specifically, the charging device is used to charge the electrochemical device through an adjusted charging strategy.

Based on the same inventive concept, an embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed, the method provided in the above-mentioned embodiments is executed.

The storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (such as a floppy disk, a hard disk, or a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a Solid State Disk (SSD)).

In the embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

In addition, the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

The above descriptions are only examples of the present application, and are not intended to limit the scope of protection of the present application. For those skilled in the art, various modifications and changes may be made to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (9)

1. An electrochemical device connected to a processor, wherein the processor is configured to: At a first moment, in response to the cumulative discharge capacity of the electrochemical device being discharged at a discharge rate greater than the preset rate within the first time period in response to being greater than the first preset capacity, or in response to the first time period , the discharge time of the electrochemical device at a discharge rate greater than the preset rate is longer than the first preset time length, and the charging strategy of the electrochemical device is adjusted; the preset rate is a high rate for the electrochemical device The critical value of the discharge and the preset rate are determined according to the extreme discharge conditions of the product or the preset rate is determined experimentally according to the demand; the first preset capacity and the first preset duration are set according to the actual demand ; Wherein, said adjusting the charging strategy of said electrochemical device includes at least one of the following operations: reducing the upper charging voltage limit of the electrochemical device; reducing the charging current of the electrochemical device; Lower the cut-off protection temperature of the electrochemical device. 2. The electrochemical device according to claim 1, wherein after adjusting the charging strategy of the electrochemical device, the processor is further configured to: At a second moment after the first moment, in response to a cumulative discharge capacity of the electrochemical device discharged at a discharge rate greater than the preset rate within a second time period greater than a second preset capacity, Or in response to the electrochemical device being discharged at a discharge rate greater than the preset rate for a period longer than a second preset time period within a second period of time, adjusting the charging strategy of the electrochemical device; the second The second preset capacity and the second preset duration are set according to actual needs. 3. The electrochemical device according to claim 2, wherein the second preset capacity is smaller than the first preset capacity, or the second preset duration is shorter than the first preset duration. 4. The electrochemical device of claim 2, wherein the processor is further configured to at least one of the following operations: When the charging upper limit voltage of the electrochemical device drops to a preset voltage, stop adjusting the charging upper limit voltage of the electrochemical device; When the charging current of the electrochemical device is reduced to a preset current, stop adjusting the charging current of the electrochemical device; When the cut-off protection temperature of the electrochemical device drops to a preset temperature, the adjustment of the cut-off protection temperature of the electrochemical device is stopped. 5. The electrochemical device according to claim 1, wherein the processor is further configured to: When the discharge rate of the electrochemical device is greater than the preset rate, the timer is triggered to count; triggering the timer to stop counting when the discharge rate of the electrochemical device is less than the preset rate; Acquiring a first accumulated time length of the timer; wherein, the first accumulated time length is the time when the electrochemical device discharges at a discharge rate greater than the preset rate. 6. The electrochemical device according to claim 5, wherein after adjusting the charging strategy of the electrochemical device, the processor is further configured to: judging whether the discharge rate of the electrochemical device reaches the preset rate; When the discharge rate of the electrochemical device is greater than the preset rate, triggering the timer to restart counting; triggering the timer to stop counting when the discharge rate of the electrochemical device is less than the preset rate; Acquiring a second cumulative duration of the timer; wherein, the second cumulative duration is after adjusting the charging strategy of the electrochemical device, and the electrochemical device is operated at a discharge rate greater than the preset rate the duration of the discharge; Based on the second cumulative duration, it is determined whether it is necessary to continue adjusting the charging strategy of the electrochemical device. 7. The electrochemical device according to claim 5, wherein after adjusting the charging strategy of the electrochemical device, the processor is further configured to: judging whether the discharge rate of the electrochemical device reaches the preset rate; When the discharge rate of the electrochemical device is greater than the preset rate, the timer is triggered to continue counting; triggering the timer to stop counting when the discharge rate of the electrochemical device is less than the preset rate; Acquiring a third cumulative duration of the timer; wherein, the third cumulative duration is after the charging strategy of the electrochemical device is adjusted, and the electrochemical device is operated at a discharge rate greater than the preset rate the duration of the discharge; Based on the third cumulative duration, it is determined whether it is necessary to continue adjusting the charging strategy of the electrochemical device. 8. A charging device, characterized in that the charging device is connected to the electrochemical device according to any one of claims 1-7, and the charging device is used for charging the electrochemical device. 9. An electronic device, comprising an electrochemical device and a processor; the electrochemical device is connected to the processor; The processor is configured to: at a first time, in response to a cumulative discharge capacity of the electrochemical device discharged at a discharge rate greater than a predetermined rate within a first time period greater than a first predetermined capacity, or In response to the electrochemical device being discharged at a discharge rate greater than a preset rate within a first time period for a period longer than a first preset time period, adjusting a charging strategy of the electrochemical device; the preset rate is The critical value of the electrochemical device for high-rate discharge, the preset rate is determined according to the extreme discharge condition of the product or the preset rate is determined experimentally according to the demand; the first preset capacity and the first The preset duration is set according to actual needs; Wherein, said adjusting the charging strategy of said electrochemical device includes at least one of the following operations: reducing the upper charging voltage limit of the electrochemical device; reducing the charging current of the electrochemical device; Lower the cut-off protection temperature of the electrochemical device.