Battery charging and discharging power control method, device and electronic equipment

Abstract

The present invention provides a method, device and electronic device for controlling the charge and discharge power of a battery. When switching the charge and discharge power spectrum, the method for controlling the charge and discharge power of the battery requires that both the charge and discharge time and the charge and discharge power meet the switching conditions, which is more scientific and can fully utilize the charge and discharge performance of the battery under the premise of ensuring the safety of the battery. At the same time, it can switch between multiple charge and discharge power spectra at will, which is more flexible and alleviates the technical problems that the existing method for controlling the charge and discharge power of the battery is not scientific enough, has poor flexibility, and cannot fully utilize the charge and discharge performance of the battery under the premise of ensuring the safety of the battery.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a method, device and electronic equipment for controlling battery charging and discharging power. Background Art

[0002] In order to ensure the service life of the battery, the control system needs to control the battery to operate within its allowable operating voltage range to prevent the battery's operating voltage from being higher than the maximum operating voltage or lower than the minimum operating voltage. In order to prevent the battery's operating voltage from being higher than the maximum operating voltage or lower than the minimum operating voltage, this can be achieved by controlling the battery's charge and discharge power. Specifically, the maximum allowable charge and discharge power of the battery can be estimated, and during the operation of the battery, the battery's charge and discharge power is controlled not to exceed the maximum allowable charge and discharge power.

[0003] The maximum allowable charge and discharge power of the battery (i.e., the battery limited discharge power) can be divided into multiple maximum allowable charge and discharge powers in different time periods (i.e., multiple charge and discharge power spectra). For example, the maximum allowable discharge power of 10 seconds, the maximum allowable discharge power of 30 seconds, and the continuous maximum allowable discharge power. At present, during the operation of the battery, the charge and discharge power spectrum is generally switched only after the maximum allowable discharge power reaches its corresponding time, that is, the switching control is performed in the order of the maximum allowable discharge power of 10 seconds, the maximum allowable discharge power of 30 seconds, and the continuous maximum allowable discharge power (e.g., in a discharge cycle, after the maximum allowable discharge power of 10 seconds reaches the discharge time of 10 seconds, it is switched to the maximum allowable discharge power of 30 seconds for discharge control). In this way, the charge and discharge performance of the battery is often not fully utilized, and the switching method is not flexible enough.

[0004] In summary, the existing control methods for battery charging and discharging power are not scientific enough and have poor flexibility. Under the premise of ensuring battery safety, the battery charging and discharging performance cannot be fully utilized. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a method, device and electronic device for controlling battery charging and discharging power, so as to alleviate the technical problems that the existing method for controlling battery charging and discharging power is not scientific enough, has poor flexibility, and cannot fully utilize the charging and discharging performance of the battery while ensuring battery safety.

[0006] In a first aspect, an embodiment of the present invention provides a method for controlling battery charging and discharging power, which is applied to a battery management system. The method includes:

[0007] When the battery management system is in an activated state, determining a current charge and discharge power spectrum, and controlling the target battery to charge and discharge based on the current charge and discharge power spectrum;

[0008] When the target battery is charged and discharged according to the current charge and discharge power spectrum, when the charge and discharge time and the charge and discharge power meet the switching condition, the current charge and discharge power spectrum is switched to the target charge and discharge power spectrum corresponding to the switching condition, and the target battery is controlled to be charged and discharged based on the target charge and discharge power spectrum;

[0009] The target charge and discharge power spectrum is used as the current charge and discharge power spectrum, and the step of controlling the target battery to charge and discharge based on the current charge and discharge power spectrum is returned to be executed until the battery management system enters a dormant state.

[0010] Furthermore, the switching conditions include: a time condition for switching the charge and discharge power spectrum and a power condition for switching the charge and discharge power spectrum, wherein the time condition for switching the charge and discharge power spectrum is determined based on the charge and discharge time corresponding to multiple charge and discharge power spectra, and the power condition for switching the charge and discharge power spectrum is determined based on the weighted sum of the maximum allowable charge and discharge powers corresponding to multiple charge and discharge power spectra.

[0011] Further, controlling the target battery to charge and discharge based on the current charge and discharge power spectrum includes:

[0012] Obtaining state of charge information and temperature information detected in real time;

[0013] Matching the detected state of charge information and temperature information with the current charge and discharge power spectrum;

[0014] The corresponding maximum allowable charge and discharge power is determined according to the matching result, and the determined maximum allowable charge and discharge power is sent to the vehicle control system, so that the vehicle control system controls the target battery to charge and discharge according to the determined maximum allowable charge and discharge power.

[0015] Further, when the current charge and discharge power spectrum is the charge and discharge power spectrum with the largest power among multiple charge and discharge power spectrums, and the voltage of the target battery meets the voltage condition of power reduction, the target battery is controlled to charge and discharge based on the current charge and discharge power spectrum, further comprising:

[0016] Obtaining state of charge information and temperature information detected in real time;

[0017] Matching the detected state of charge information and temperature information with the current charge and discharge power spectrum;

[0018] Determine the corresponding maximum allowable charge and discharge power according to the matching result, and multiply the determined maximum allowable charge and discharge power by a preset ratio to obtain a target maximum allowable charge and discharge power;

[0019] The target maximum allowable charge and discharge power is sent to a vehicle control system, so that the vehicle control system controls the target battery to charge and discharge according to the target maximum allowable charge and discharge power.

[0020] Furthermore, the method further comprises:

[0021] When the vehicle control system controls the target battery to charge and discharge according to the target maximum allowable charge and discharge power, and the voltage of the target battery meets the voltage condition of power increase, the charge and discharge power of the target battery is adjusted to the maximum allowable charge and discharge power corresponding to the charge and discharge power spectrum with the largest power among the multiple charge and discharge power spectra;

[0022] When the vehicle control system controls the target battery to charge and discharge according to the target maximum allowable charge and discharge power, and the voltage of the target battery does not meet the voltage condition for power increase, the target battery continues to be controlled to charge and discharge according to the target maximum allowable charge and discharge power until the voltage of the target battery meets the voltage condition for power increase, and then the charge and discharge power of the target battery is adjusted to the maximum allowable charge and discharge power corresponding to the charge and discharge power spectrum with the largest power among the multiple charge and discharge power spectra.

[0023] Further, when the control of charging and discharging the target battery based on the current charging and discharging power spectrum is switched to the control of charging and discharging the target battery based on the target charging and discharging power spectrum, a preset power rise and fall speed is met.

[0024] Furthermore, the multiple charging and discharging power spectra include: three discharging power spectra and two charging power spectra.

[0025] In a second aspect, an embodiment of the present invention further provides a battery charging and discharging power control device, which is applied to a battery management system, and the device includes:

[0026] a determination unit, configured to determine a current charge and discharge power spectrum when the battery management system is in an activated state, and control the target battery to charge and discharge based on the current charge and discharge power spectrum;

[0027] a switching unit, configured to, when the target battery is charged and discharged according to the current charge and discharge power spectrum, switch the current charge and discharge power spectrum to a target charge and discharge power spectrum corresponding to the switching condition when the charge and discharge time and the charge and discharge power meet the switching condition, and control the target battery to charge and discharge based on the target charge and discharge power spectrum;

[0028] The return execution unit is used to use the target charge and discharge power spectrum as the current charge and discharge power spectrum, and return to execute the step of controlling the target battery to charge and discharge based on the current charge and discharge power spectrum until the battery management system enters a dormant state.

[0029] In a third aspect, an embodiment of the present invention further provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any one of the methods described in the first aspect when executing the computer program.

[0030] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores machine-executable instructions. When the machine-executable instructions are called and executed by a processor, the machine-executable instructions prompt the processor to execute any method described in the first aspect above.

[0031] In an embodiment of the present invention, a method for controlling battery charge and discharge power is provided, which is applied to a battery management system, and the method includes: when the battery management system is in an activated state, determining the current charge and discharge power spectrum, and controlling the target battery to charge and discharge based on the current charge and discharge power spectrum; when the target battery is charged and discharged according to the current charge and discharge power spectrum, when the charge and discharge time and the charge and discharge power meet the switching condition, the current charge and discharge power spectrum is switched to the target charge and discharge power spectrum corresponding to the switching condition, and the target battery is controlled to charge and discharge based on the target charge and discharge power spectrum; the target charge and discharge power spectrum is used as the current charge and discharge power spectrum, and the step of controlling the target battery to charge and discharge based on the current charge and discharge power spectrum is returned until the battery management system enters a dormant state. It can be seen from the above description that the control method of the present invention requires that the charge and discharge time and the charge and discharge power meet the switching conditions when switching the charge and discharge power spectrum, which is more scientific and can fully utilize the charge and discharge performance of the battery under the premise of ensuring the safety of the battery. At the same time, it can be switched between multiple charge and discharge power spectra at will, which is more flexible, alleviating the technical problems that the existing control method of battery charge and discharge power is not scientific enough, has poor flexibility, and cannot fully utilize the charge and discharge performance of the battery under the premise of ensuring the safety of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A flow chart of a method for controlling battery charging and discharging power provided by an embodiment of the present invention;

[0034] Figure 2A schematic diagram of the time conditions for switching the charge and discharge power spectrum and the power conditions for switching the charge and discharge power spectrum provided in an embodiment of the present invention;

[0035] Figure 3 A flow chart of controlling the charging and discharging of a target battery based on the current charging and discharging power spectrum provided by an embodiment of the present invention;

[0036] Figure 4 Another flowchart of controlling the charging and discharging of a target battery based on the current charging and discharging power spectrum provided by an embodiment of the present invention;

[0037] Figure 5 A schematic diagram of a method for optimizing discharge power reduction provided by an embodiment of the present invention;

[0038] Figure 6 A schematic diagram of a method for optimizing charging power reduction provided by an embodiment of the present invention;

[0039] Figure 7 A schematic diagram of a battery charging and discharging power control device provided by an embodiment of the present invention;

[0040] Figure 8 A schematic diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] At present, during the operation of the battery, the charge and discharge power spectrum is generally switched only after the maximum allowable discharge power reaches its corresponding time, that is, the switching control is performed in the order of 10-second maximum allowable discharge power, 30-second maximum allowable discharge power and continuous maximum allowable discharge power (for example, in a discharge cycle, after the 10-second maximum allowable discharge power reaches the discharge time of 10 seconds, it is switched to the 30-second maximum allowable discharge power for discharge control). In this way, the charge and discharge performance of the battery is often not fully utilized, and the switching method is not flexible enough.

[0043] Based on this, this embodiment provides a method for controlling the charging and discharging power of a battery. When switching the charging and discharging power spectrum, this method requires that both the charging and discharging time and the charging and discharging power meet the switching conditions. This method is more scientific and can fully utilize the charging and discharging performance of the battery while ensuring the safety of the battery. At the same time, it can switch between multiple charging and discharging power spectra at will, which is more flexible.

[0044] To facilitate understanding of this embodiment, a method for controlling battery charging and discharging power disclosed in an embodiment of the present invention is first introduced in detail.

[0045] Embodiment 1:

[0046] According to an embodiment of the present invention, an embodiment of a method for controlling battery charging and discharging power is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0047] Figure 1 is a flow chart of a method for controlling battery charging and discharging power according to an embodiment of the present invention. Figure 1 As shown, the method comprises the following steps:

[0048] Step S102, when the battery management system is in an activated state, determining a current charge and discharge power spectrum, and controlling the target battery to charge and discharge based on the current charge and discharge power spectrum;

[0049] In an embodiment of the present invention, the battery charging and discharging power control method is applied to a battery management system, which stores multiple charging and discharging power spectra of the target battery, each of which contains the maximum allowable charging and discharging power of the target battery at each state of charge and each temperature.

[0050] In an embodiment of the present invention, multiple charging and discharging power spectra may include: three discharge power spectra and two charging power spectra, the three discharge power spectra may be a 10-second discharge power spectrum, a 30-second discharge power spectrum and a continuous discharge power spectrum, and the two charging power spectra may be a 10-second charging power spectrum and a continuous charging power spectrum.

[0051] It should be noted that the number of multiple charging and discharging power spectra is determined according to the characteristics of the battery cell. There can be more discharge power spectra and more charging power spectra. When there are more discharge power spectra, the first two relatively large power spectra can correspond to the 10-second discharge power spectrum and the 30-second discharge power spectrum respectively, and all other discharge power spectra can be expressed as continuous discharge power spectrum, and the charging power spectrum is processed similarly.

[0052] The embodiment of the present invention takes a 10-second discharge power spectrum, a 30-second discharge power spectrum and a continuous discharge power spectrum, a 10-second charging power spectrum and a continuous charging power spectrum as examples for explanation, and the corresponding power spectra are shown in the following table:

[0053] 10-second discharge power spectrum (P10s):

[0054] T / SOC 0％ 8.3％ 10％ 15％ 20％ 25％ 30％ 35％ 40％ 45％ 50％ 55％ 60％ 65％ 70％ 75％ 80％ 85％ 90％ 95％ -30℃ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -29℃ 5.47 5.471 8.51 9.85 11.1 13.7 18.3 23.3 28.2 33.2 38.1 43.1 47.4 51.8 56.1 61.1 69.7 78.3 84.1 89.8 -25℃ 5.93 5.927 9.22 12.1 15 20.2 26.1 31.9 36.5 41.2 46.3 51.4 57.5 63.7 72.1 80.5 89 97.5 108 119 -20℃ 6.08 6.075 9.47 13.8 18.1 25.6 33.6 41.6 47.3 53 59.6 66.4 73.5 80.7 88.8 96.9 105 114 129 144 -15℃ 6.67 6.668 10.5 16.9 25 33 46.2 61.1 72 82.9 92.2 102 112 123 131 140 147 150 150 150 -10℃ 7.65 7.655 14 22.5 32.8 43 58.9 80.8 96.9 113 125 137 150 150 150 150 150 150 150 150 -5℃ 10.1 10.12 16.3 29 37.4 51.6 78.5 105 124 143 150 150 150 150 150 150 150 150 150 150 0℃ 13.1 13.12 20.4 39.6 46.2 67.8 101 133 150 150 150 150 150 150 150 150 150 150 150 150 5℃ 21.4 21.4 34 60.9 75.7 104 129 150 150 150 150 150 150 150 150 150 150 150 150 150 10℃ 30.7 30.65 49.8 84.5 109 144 150 150 150 150 150 150 150 150 150 150 150 150 150 150 15℃ 35 34.99 56.2 95.9 134 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 20℃ 40.6 40.64 64.8 115 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 25℃ 46.3 46.28 73.4 135 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 30℃ 46.3 46.27 73.3 135 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 35℃ 46.3 46.27 73.3 135 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 40℃ 46.3 46.26 73.3 135 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 45℃ 46.2 46.23 73.2 135 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 50℃ 38.4 38.44 61.1 113 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 54℃ 34.7 34.72 55.1 101 144 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 55℃ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

[0055] 30 seconds discharge power spectrum (P30s):

[0056] T / SOC 0％ 8.3％ 10％ 15％ 20％ 25％ 30％ 35％ 40％ 45％ 50％ 55％ 60％ 65％ 70％ 75％ 80％ 85％ 90％ 95％ -30℃ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -29℃ 3.07 3.067 4.97 6.34 8.31 11.1 15.2 19.3 23.5 27.6 31.7 35.8 39.4 43.1 46.7 50.3 55.7 62 64.8 67.6 -25℃ 3.53 3.528 5.72 7.7 11.7 15.7 19.8 23.9 29.6 35.3 42.1 48.9 53 57.2 62.3 67.3 73 78.6 85.6 92.6 -20℃ 3.8 3.796 6.16 9.45 15.3 22.4 27.7 33 41.4 49.9 58.6 64.7 71.3 75.1 78.9 82.8 87.7 95 104 115 -15℃ 4.45 4.449 8.76 14.1 20.8 27.5 35.1 44.5 55.5 66.5 75.2 84 91.1 98.3 104 109 117 126 131 141 -10℃ 5.16 5.161 11.6 18.8 27.3 35.8 46.7 57.5 69.7 83.3 92.1 101 111 122 129 138 147 150 150 150 -5℃ 7.06 7.06 13.7 19.5 31.3 43.2 57.1 71 84.8 98.6 112 126 134 141 148 150 150 150 150 150 0℃ 9 8.999 15.8 23.9 38.1 52.3 67.8 84.7 102 118 135 150 150 150 150 150 150 150 150 150 5℃ 14 14.02 28.5 42.2 63.1 83.9 98 112 126 140 150 150 150 150 150 150 150 150 150 150 10℃ 19.4 19.41 41.8 64.7 91.9 119 131 143 150 150 150 150 150 150 150 150 150 150 150 150 15℃ 23.1 23.1 47.6 79.9 114 147 150 150 150 150 150 150 150 150 150 150 150 150 150 150 20℃ 27.5 27.47 54.9 97.3 138 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 25℃ 29.5 29.48 62.2 115 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 30℃ 29.5 29.48 62.1 115 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 35℃ 29.5 29.48 62.1 115 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 40℃ 29.5 29.48 62.1 114 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 45℃ 29.5 29.46 62.1 114 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 50℃ 23.7 23.72 51.8 95.5 136 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 54℃ 21.4 21.42 46.6 86.1 122 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 55℃ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

[0057] Continuous discharge power spectrum (i.e. P continuous):

[0058] T / SOC 0％ 8.3％ 10％ 15％ 20％ 25％ 30％ 35％ 40％ 45％ 50％ 55％ 60％ 65％ 70％ 75％ 80％ 85％ 90％ 95％ -30℃ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -29℃ 0.83 0.831 3.93 6.03 7.35 8.66 9.57 10.5 11.5 13 14.3 16 17.4 18.9 21.3 23.8 24 24.1 24.2 24.4 -25℃ 1.14 1.144 4.79 7.26 8.38 9.49 11.5 14.6 16.5 18.5 19.3 20.3 21.1 22 23.6 25.9 26.2 26.5 26.7 27.1 -20℃ 1.52 1.523 6.09 8.48 9.41 10.3 13.5 18.7 21.4 24 24.3 24.6 24.8 25.1 25.8 28 28.4 28.8 29.2 29.9 -15℃ 2.22 2.216 6.79 9.59 14.1 17.1 18.9 21.6 23.1 24.5 24.8 25.8 27.4 29.1 30.7 33 33.5 33.9 34.4 35.3 -10℃ 2.91 2.909 7.49 10.7 18.7 23.9 24.2 24.5 24.8 25 25.3 27 30.1 33.1 35.6 38 38.5 39.1 39.6 40.7 -5℃ 4.38 4.384 10.3 14.9 28.9 31.7 32 32.4 32.6 32.9 33.2 34.7 36.5 38.3 39.8 42.2 42.8 43.4 44 45.3 0℃ 5.86 5.859 13.1 19.1 39 39.5 39.8 40.2 40.5 40.8 41.2 42.4 42.9 43.5 44.1 46.4 47.1 47.8 48.5 50 5℃ 9.52 9.518 18 29.1 44.2 44.7 45.1 45.4 45.7 46 46.5 48.1 49.3 52.3 54.9 58.4 59.3 60.2 61 62.8 10℃ 13.2 13.17 22.9 39.1 49.5 49.9 50.3 50.6 51 51.3 51.7 53.7 55.6 61.2 65.8 70.4 71.5 72.6 73.6 74.5 15℃ 17.7 17.74 31.1 41.7 53.6 55.9 57.1 58.4 59.6 60.9 61.8 63.5 64.9 68.2 71.1 73.9 75.1 76.2 77.6 79.5 20℃ 22.3 22.3 39.3 44.3 57.7 61.8 63.9 66.1 68.3 70.4 71.9 73.3 74.2 75.1 76.3 77.4 78.6 79.8 81.6 83.4 25℃ 27.7 27.67 47.9 49.1 64.6 70.2 73.1 76.1 79 82 83.9 85.8 86.8 87.9 89.3 90.6 92 93.5 95.6 97.7 30℃ 27.7 27.67 47.9 49.1 64.6 70.2 73.1 76.1 79 82 83.9 85.8 86.8 87.9 89.3 90.6 92 93.5 95.6 97.7 35℃ 27.7 27.67 47.9 49.1 64.6 70.2 73.1 76.1 79 82 83.9 85.8 86.8 87.9 89.3 90.6 92 93.4 95.5 97.7 40℃ 27.7 27.67 47.9 49.1 64.6 70.2 73.1 76.1 79 82 83.9 85.8 86.8 87.9 89.3 90.6 92 93.4 95.5 97.7 45℃ 27.7 27.66 47.8 49.1 64.5 70.1 73.1 76 79 81.9 83.8 85.7 86.8 87.8 89.2 90.6 92 93.4 95.5 97.6 50℃ 22.3 22.26 38.7 39.5 40 40.5 40.8 41.2 41.4 41.6 41.9 42.2 42.7 43.2 43.9 44.6 45.2 45.9 47 48.1 54℃ 9.22 9.22 16 16.4 16.6 16.8 16.9 17 17.1 17.2 17.3 17.5 17.7 17.9 18.2 18.4 18.7 19 19.4 19.9 55℃ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

[0059] 10-second charging power spectrum (P10s):

[0060] T / SOC 0％ 5％ 10％ 15％ 20％ 25％ 30％ 35％ 40％ 45％ 50％ 55％ 60％ 65％ 70％ 75％ 80％ 85％ 86.7％ 91.7％ 95％ -20℃ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -19℃ 25.1 24.3 23.3 21.5 21.3 21.2 18.8 16.4 16 15.6 14.4 13.1 10.7 8.08 6.72 5.34 3.82 3.19 2.109 2.1087 0 -15℃ 36.3 34.9 33.3 31.4 29.3 27.1 24.3 21.5 20.6 19.6 17.6 15.6 13 10.1 8.78 7.42 5.37 3.34 2.204 2.2045 0 -10℃ 50.2 48 45.8 43.6 39.2 34.9 31.5 28.1 26.5 24.8 21.9 19 16.2 13.3 11.9 10.4 7.58 4.78 3.153 3.1535 0 -5℃ 58.5 55.6 53.6 51.7 48.7 45.7 43.6 41.5 40.5 39.3 36.6 33.8 30.4 25.4 22.8 20.2 14.2 8.41 5.548 5.5485 0 0℃ 63.4 59.9 58.3 56.8 55.4 54.1 53.5 52.9 52.4 52 49.5 47.1 43.3 35.3 31.8 28.2 19.7 11.4 7.497 7.4974 0 5℃ 91.7 89.6 88.5 87.5 86.2 85 84 83.1 82.2 81.2 77.3 73.4 64.1 51.4 47.5 43.5 30.9 18.5 12.2 12.196 0 10℃ 116 115 115 114 113 111 110 109 108 106 101 96 82.2 68.3 63.9 59.2 42.4 25.7 16.98 16.975 0 15℃ 122 121 120 119 118 117 115 114 113 111 107 102 92.3 82.5 78 73.1 52.8 32.8 21.62 21.618 0 20℃ 139 137 136 135 134 133 131 130 128 127 122 117 110 102 97.1 91.6 66.5 41.7 27.51 27.506 0 25℃ 144 142 141 140 139 137 136 135 133 131 127 122 117 112 107 101 73.9 46.6 30.73 30.726 0 30℃ 144 142 141 140 139 137 136 135 133 131 127 122 117 112 107 101 73.9 46.6 30.74 30.737 0 35℃ 144 142 141 140 139 137 136 135 133 131 127 122 117 112 107 101 73.9 46.6 30.75 30.747 0 40℃ 144 142 141 140 139 137 136 135 133 131 127 122 117 112 107 101 73.9 46.6 30.76 30.758 0 45℃ 144 142 141 140 139 137 136 135 133 131 127 122 117 112 107 101 73.9 46.5 30.71 30.713 0 50℃ 120 119 118 117 116 115 113 112 111 109 106 102 97.7 93.6 89.2 84.4 61.5 38.7 25.56 25.557 0 54℃ 108 107 106 105 104 103 102 101 99.7 98.5 95 91.5 87.9 84.2 80.3 76 55.4 34.9 23 23.001 0 55℃ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

[0061] Continuous charging power spectrum (i.e. P continuous):

[0062] T / SOC 0％ 5％ 10％ 15％ 20％ 25％ 30％ 35％ 40％ 45％ 50％ 55％ 60％ 65％ 70％ 75％ 80％ 85％ 86.7％ 91.7％ 95％ -20℃ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -19℃ 5.01 4.92 4.39 3.86 3.51 3.16 2.62 2.63 2.65 2.67 2.7 2.75 2.81 2.88 2.89 2.91 2.94 2.99 1.976 1.9759 0 -15℃ 6.5 6.28 5.84 5.4 4.88 4.35 4.36 4.39 4.41 4.45 4.5 2.75 2.79 2.84 2.88 2.91 2.94 2.99 1.976 1.9759 0 -10℃ 9.96 9.52 9.08 8.65 7.77 6.89 6.24 5.58 5.25 5.29 5.35 5.45 5.52 2.83 2.87 2.91 2.94 2.99 1.976 1.9759 0 -5℃ 15 14.3 13.8 13.3 12.5 11.8 11.2 10.7 10.4 10.2 8.61 7.04 6.74 6.44 6.22 5.99 4.49 3 1.977 1.9768 0 0℃ 19.9 20.2 20.4 17.9 17.6 17.2 17 16.8 16.7 16.6 14.4 12.1 11.7 11.3 11.5 10.6 7.96 7.19 4.742 4.7421 0 5℃ 26.4 25.9 25.6 25.3 24.9 24.6 24.4 24.1 23.9 23.7 21.9 20.1 19.1 18 17 15.9 11.8 8.98 5.928 5.9276 0 10℃ 33.1 32.9 32.7 32.6 32.2 31.9 31.6 31.3 30.9 30.6 29 27.4 25.8 24.2 22.6 21 15.5 9.9 6.535 6.5354 0 15℃ 40.6 40.3 40.1 39.9 39.5 39.1 38.7 38.3 37.9 37.5 36 34.5 32.9 31.4 29.9 28.3 20.2 12.1 8.019 8.0187 0 20℃ 50.1 50.4 51 51.6 51.9 52.2 52.4 47.3 46.8 46.3 44.8 43.3 41.7 40.2 38.7 37.2 26.1 15 9.911 9.9112 0 25℃ 64.8 66.1 67.3 67 67.5 67.9 68.2 63.2 63.6 64.1 65 55.1 55.8 48.1 48.8 37.8 26.4 19.8 13.04 13.041 0 30℃ 64.8 66.1 67.3 67 67.5 67.9 68.2 63.2 63.6 64.1 65 55.1 55.8 48.1 48.8 37.8 26.4 19.8 13.04 13.041 0 35℃ 64.8 66.1 67.3 67 67.5 67.9 68.2 63.2 63.6 64.1 65 55.1 55.8 48.1 48.8 37.8 26.4 19.8 13.04 13.041 0 40℃ 64.8 66.1 67.3 67 67.5 67.9 68.2 63.2 63.6 64.1 65 55.1 55.8 48.1 48.8 37.8 26.4 19.8 13.04 13.041 0 45℃ 43.2 42.8 43.4 43.8 44.1 44.4 44.6 44.8 45.1 45.4 46.1 46.8 47.4 35.5 34.5 33.4 26.4 19.8 13.04 13.041 0 50℃ 25.1 25.4 25.7 26 26.1 26.3 26.4 26.5 26.7 26.9 27.3 27.7 28.1 20.6 20 19.4 19.5 19.9 13.15 13.154 0 54℃ 25.1 25.4 25.7 26 26.1 26.3 26.4 26.5 26.7 26.9 27.3 27.7 28.1 20.6 20 19.4 19.5 19.9 13.15 13.154 0 55℃ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

[0063] In the specific implementation, after the battery management system is activated (starting the vehicle with the target battery can activate the battery management system), first enter the above-mentioned 10-second discharge power spectrum, that is, the current charge and discharge power spectrum is the 10-second discharge power spectrum, and then obtain the state of charge information and temperature information obtained by real-time detection. Assuming that the detected state of charge information is 90% and the temperature information is 20°C, by matching with the 10-second discharge power spectrum, it can be known that the maximum allowable discharge power is 150KW. The determined maximum allowable discharge power of 150KW is sent to the vehicle control system, and the vehicle control system controls the discharge power of the target battery to be 150KW for discharge. That is, the target battery is controlled to charge and discharge based on the current charge and discharge power spectrum.

[0064] Step S104, when the target battery is charged and discharged according to the current charge and discharge power spectrum, when the charge and discharge time and the charge and discharge power meet the switching condition, the current charge and discharge power spectrum is switched to the target charge and discharge power spectrum corresponding to the switching condition, and the target battery is controlled to charge and discharge based on the target charge and discharge power spectrum;

[0065] Figure 2 , the switching conditions for switching the charge and discharge power spectrum are shown. It can be seen that the switching conditions include: the time conditions for switching the charge and discharge power spectrum and the power conditions for switching the charge and discharge power spectrum.

[0066] That is, when the time for the target battery to be charged and discharged according to the current charge and discharge power spectrum meets the time condition for switching the charge and discharge power spectrum, and the average power of the target battery to be charged and discharged according to the current charge and discharge power spectrum meets the power condition for switching the charge and discharge power spectrum, the current charge and discharge power spectrum is switched to the target charge and discharge power spectrum corresponding to the switching condition.

[0067] It should be noted that the above-mentioned time conditions are to ensure the safety of the target battery, and the above-mentioned power conditions are to maximize the charging and discharging performance of the battery under the premise of ensuring the safety of the target battery. Because the power conditions are weighted sums rather than a single discharge power spectrum, the weighting coefficients are determined by the inventors after a large number of experiments.

[0068] The target charge and discharge power spectrum is a charge and discharge power spectrum corresponding to the time condition of the charge and discharge power spectrum switching and the power condition of the charge and discharge power spectrum switching, respectively, and the target charge and discharge power spectrum is one of the multiple charge and discharge power spectrums;

[0069] The following takes the switching from P10s during discharge to P30s during discharge as an example for explanation:

[0070] In step S102, the vehicle control system controls the target battery to discharge at a discharge power of 150KW. At this time, the actual discharge power of the target battery is also detected in real time. Assuming that the actual discharge power of the target battery is 150KW, the battery management system obtains the actual discharge power of 150KW and continues to obtain the state of charge information and temperature information obtained by real-time detection. Assuming that the detected state of charge information is 75% and the temperature information is -10°C, by matching with the 30-second discharge power spectrum, it can be known that the maximum allowable discharge power is 138KW, that is, (the actual discharge power is 150KW (i.e. Figure 2 P in actual) - the maximum allowable discharge power of 138KW (i.e. Figure 2 P30s))>0, at this time, Figure 2 ε in is equal to 1, and the detected state of charge information of 75% and temperature information of -10℃ are matched with the 10-second discharge power spectrum. It can be seen that the maximum allowable discharge power is 150KW, and the maximum allowable discharge power of 150KW is continued to be sent to the vehicle control system. The vehicle control system controls the discharge power of the target battery to be 150KW for discharge. At this time, the actual discharge power of the target battery is continued to be detected in real time. Assuming that the actual discharge power of the target battery is 150KW, the battery management system obtains the actual discharge power of 150KW, and continues to obtain the state of charge information and temperature information obtained by real-time detection. Assuming that the detected state of charge information is 75% and the temperature information is -10℃, by matching with the 30-second discharge power spectrum, it can be known that the maximum allowable discharge power is 138KW, that is, (actual discharge power 150KW-maximum allowable discharge power 138KW determined based on the 30-second discharge power spectrum)>0. At this time, Figure 2ε in is added by 1, and the detected state of charge information 75%, temperature information -10℃ are matched with the 10-second discharge power spectrum. It can be seen that the maximum allowable discharge power is 150KW. The maximum allowable discharge power of 150KW is sent to the vehicle control system. The vehicle control system controls the discharge power of the target battery to be 150KW for discharge and continues to monitor. When the value of ε is ≥10s, it means that the time condition of switching from P10s to P30s is met. In the above process, the actual discharge power value greater than P30s in 10s is recorded, and the average value of these actual power values ​​is calculated. If the average value of the actual power is greater than or equal to 0.7×P30s+0.3×P 10s (here P30s and P10s are the average values ​​of P30s in 10 seconds corresponding to the detected state of charge information and temperature information, and the average value of P10s in 10 seconds), indicating that the power condition for switching from P10s to P30s is met, then the discharge power spectrum is switched to P30s (i.e., the 30-second discharge power spectrum), and the maximum allowable discharge power is determined in the 30-second discharge power spectrum based on the real-time detected state of charge information and temperature information, and the determined maximum allowable discharge power is sent to the vehicle control system, which controls the target battery to discharge according to the determined discharge power (i.e., controls the target battery to charge and discharge based on the target charge and discharge power spectrum).

[0071] Let's take the example of switching from P30s during discharge to P10s during discharge as an example to briefly explain:

[0072] The time condition refers to the use of a 30-second discharge power spectrum to control the target battery to discharge for 20 seconds, and the power condition is that the average value of the actual power value for 60 seconds is less than or equal to the average value of P continuous in 60 seconds. Once satisfied, switch to the 10-second discharge power spectrum of P10s. The conversion between other charge and discharge power spectra is similar to the above process and will not be repeated here. In addition, the above conversion process seems complicated, but for the battery management system and the vehicle control system, the above implementation process is very fast and can be regarded as real-time.

[0073] It should be noted that: Figure 2 It can be seen from the conditions in that the discharge cycle of the target battery is 70 seconds.

[0074] In addition, when the above-mentioned discharge power spectrum switching operation is being performed, the charging power spectrum switching operation is also being performed synchronously. The switching operation mode of the charging power spectrum is similar to the above process and will not be repeated here. The battery management system will send the determined maximum allowable discharge power and maximum allowable charging power to the vehicle control system, and the vehicle control system will control whether the target battery is charged or discharged according to the above-determined values.

[0075] Step S106, taking the target charge and discharge power spectrum as the current charge and discharge power spectrum, and returning to the step of controlling the target battery to charge and discharge based on the current charge and discharge power spectrum until the battery management system enters a dormant state.

[0076] In an embodiment of the present invention, a method for controlling battery charge and discharge power is provided, which is applied to a battery management system, and the method includes: when the battery management system is in an activated state, determining the current charge and discharge power spectrum, and controlling the target battery to charge and discharge based on the current charge and discharge power spectrum; when the target battery is charged and discharged according to the current charge and discharge power spectrum, when the charge and discharge time and the charge and discharge power meet the switching condition, the current charge and discharge power spectrum is switched to the target charge and discharge power spectrum corresponding to the switching condition, and the target battery is controlled to charge and discharge based on the target charge and discharge power spectrum; the target charge and discharge power spectrum is used as the current charge and discharge power spectrum, and the step of controlling the target battery to charge and discharge based on the current charge and discharge power spectrum is returned until the battery management system enters a dormant state. It can be seen from the above description that the control method of the present invention requires that the charge and discharge time and the charge and discharge power meet the switching conditions when switching the charge and discharge power spectrum, which is more scientific and can fully utilize the charge and discharge performance of the battery under the premise of ensuring the safety of the battery. At the same time, it can be switched between multiple charge and discharge power spectra at will, which is more flexible, alleviating the technical problems that the existing control method of battery charge and discharge power is not scientific enough, has poor flexibility, and cannot fully utilize the charge and discharge performance of the battery under the premise of ensuring the safety of the battery.

[0077] The above content briefly introduces the control method of battery charging and discharging power. The specific contents involved are described in detail below.

[0078] In an optional embodiment of the present invention, Figure 2 It can be seen from the time conditions and power conditions shown in that the time condition for switching the charge and discharge power spectrum is determined based on the charge and discharge time corresponding to multiple charge and discharge power spectra, and the power condition for switching the charge and discharge power spectrum is determined based on the weighted sum of the maximum allowable charge and discharge powers corresponding to multiple charge and discharge power spectra.

[0079] In an alternative embodiment of the present invention, reference Figure 3 Step S102, controlling the target battery to charge and discharge based on the current charge and discharge power spectrum, specifically includes the following steps:

[0080] Step S301, acquiring state of charge information and temperature information detected in real time;

[0081] Step S302, matching the detected state of charge information and temperature information with the current charge and discharge power spectrum;

[0082] Step S303, determining the corresponding maximum allowable charge and discharge power according to the matching result, and sending the determined maximum allowable charge and discharge power to the vehicle control system, so that the vehicle control system controls the target battery to charge and discharge according to the determined maximum allowable charge and discharge power.

[0083] The embodiment of the present invention also provides an optimized power reduction method to prevent the target battery from being overcharged or over-discharged. In an optional embodiment of the present invention, when the current charge and discharge power spectrum is the charge and discharge power spectrum with the largest power among multiple charge and discharge power spectrums, and the voltage of the target battery meets the voltage condition for power reduction, the reference Figure 4 , step S102, controlling the target battery to charge and discharge based on the current charge and discharge power spectrum, further comprising:

[0084] Step S401, acquiring state of charge information and temperature information detected in real time;

[0085] Step S402, matching the detected state of charge information and temperature information with the current charge and discharge power spectrum;

[0086] Step S403, determining the corresponding maximum allowable charge and discharge power according to the matching result, and multiplying the determined maximum allowable charge and discharge power by a preset ratio to obtain a target maximum allowable charge and discharge power;

[0087] Step S404, sending the target maximum allowable charge and discharge power to the vehicle control system, so that the vehicle control system controls the target battery to charge and discharge according to the target maximum allowable charge and discharge power.

[0088] For the target battery in the above example, the voltage condition for the voltage to meet the power reduction requirement may be: when discharging, the voltage is lower than 3.1V (normal temperature); when charging, the voltage is higher than 4.2V.

[0089] Specifically, refer to Figure 5 During the discharge process, when the minimum voltage of the battery cell is 3.0V (normal temperature), the maximum use of 10s power (i.e., 10-second discharge power spectrum) determines 80% of the maximum allowable discharge power; when the minimum voltage of the battery cell is 2.9V, the maximum use of 10s power determines 50% of the maximum allowable discharge power; when the minimum voltage of the battery cell is 2.8V, the maximum use of 10s power determines 0% of the maximum allowable discharge power, and the intermediate states are linearly interpolated. It should be noted that during this process, the power reduction rate is limited to 20KW / s.

[0090] The above power reduction methods can be summarized as shown in the following table:

[0091]

[0092] Where, Vend represents the cut-off voltage. Figure 5 (At room temperature), the cut-off voltage is 2.8V, that is, when the minimum voltage is greater than or equal to 2.8V+0.3=3.1V, the power limit value is P10s; when the minimum voltage is equal to 2.8V+0.2=3.0V, the power limit value is 80%P10s; when the minimum voltage is equal to 2.8V+0.1=2.9V, the power limit value is 50%P10s; when the minimum voltage is less than or equal to 2.8V, the power limit value is 0. It can be seen that Figure 5 The content in matches.

[0093] When the temperature is different, the Vend (cut-off voltage) of the target battery is also different. For the battery used as an example in the embodiment of the present invention, Vend = [2.1V, 2.1V, 2.6V, 2.6V, 2.8V, 2.8V], and the corresponding temperatures are -30°C, -25°C, -20°C, -5°C, 0°C, and 55°C respectively.

[0094] refer to Figure 6 During the charging process, when the maximum voltage of the battery cell is 4.23V, the maximum use of 10s power (i.e., 10-second charging power spectrum) determines 80% of the maximum allowable charging power; when the maximum voltage of the battery cell is 4.26V, the maximum use of 10s power determines 50% of the maximum allowable charging power; when the maximum voltage of the battery cell is 4.28V, the maximum use of 10s power determines 0% of the maximum allowable charging power, and the intermediate states are linearly interpolated. It should be noted that during this process, the power reduction rate is limited to 20KW / s.

[0095] In an optional embodiment of the present invention, the method also includes: when the whole vehicle control system controls the target battery to charge and discharge according to the target maximum allowable charge and discharge power, and the voltage of the target battery meets the voltage condition of power increase, adjusting the charge and discharge power of the target battery to the maximum allowable charge and discharge power corresponding to the charge and discharge power spectrum with the largest power among multiple charge and discharge power spectra; when the whole vehicle control system controls the target battery to charge and discharge according to the target maximum allowable charge and discharge power, and the voltage of the target battery does not meet the voltage condition of power increase, continuing to control the target battery to charge and discharge according to the target maximum allowable charge and discharge power until the voltage of the target battery meets the voltage condition of power increase, and then adjusting the charge and discharge power of the target battery to the maximum allowable charge and discharge power corresponding to the charge and discharge power spectrum with the largest power among multiple charge and discharge power spectra.

[0096] For the above process, if the target battery is an example in the embodiment of the present invention, such as Figure 5As shown, when the cell voltage is 2.9V, the target battery is controlled to discharge according to 50% P10s. When the voltage of the target battery rises, the voltage condition for power increase is met, that is, the voltage rises to 3.1V, and then the discharge power of the target battery is adjusted to P10s; if it does not rise to 3.1V, the target battery is still controlled to discharge according to 50% P10s until the voltage rises to 3.1V, and then the discharge power of the target battery is adjusted to P10s, limiting the power increase rate to 4KW / s; Figure 6 As shown, when the cell voltage is 4.26V, the target battery is charged according to 50% P10s. When the voltage of the target battery drops, the voltage condition for power increase is met, that is, the voltage drops to 4.2V, and then the charging power of the target battery is adjusted to P10s; if it does not drop to 4.2V, the target battery is still charged according to 50% P10s until the voltage drops to 4.2V, and then the charging power of the target battery is adjusted to P10s, limiting the power increase rate to 4KW / s.

[0097] In an optional embodiment of the present invention, when controlling the target battery to charge and discharge based on the current charge and discharge power spectrum is switched to controlling the target battery to charge and discharge based on the target charge and discharge power spectrum, a preset power rise and fall speed is met.

[0098] like Figure 2 As shown, when the power increases, the power increase speed can be less than or equal to 4KW / s (that is, dP / dt≤4KW / s in the figure), and when the power decreases, the power decrease speed can be less than or equal to 4.5KW / s (that is, dP / dt≤4.5KW / s in the figure). The purpose of this setting is to prevent the vehicle from being stuck due to too fast a rate increase or decrease, resulting in a poor user experience.

[0099] Embodiment 2:

[0100] An embodiment of the present invention further provides a battery charge and discharge power control device, which is mainly used to execute the battery charge and discharge power control method provided in the first embodiment of the present invention. The battery charge and discharge power control device provided in the embodiment of the present invention is specifically introduced below.

[0101] Figure 7 is a schematic diagram of a battery charging and discharging power control device according to an embodiment of the present invention. Figure 7 As shown, the device is applied to a battery management system, and mainly includes: a determination unit 10, a switching unit 20 and a return execution unit 30, wherein:

[0102] A determination unit, used to determine a current charge and discharge power spectrum when the battery management system is in an activated state, and control the target battery to charge and discharge based on the current charge and discharge power spectrum;

[0103] A switching unit, used for, when the target battery is charged and discharged according to the current charge and discharge power spectrum, when the charge and discharge time and the charge and discharge power meet the switching condition, switching the current charge and discharge power spectrum to a target charge and discharge power spectrum corresponding to the switching condition, and controlling the target battery to charge and discharge based on the target charge and discharge power spectrum;

[0104] The return execution unit is used to use the target charge and discharge power spectrum as the current charge and discharge power spectrum, and return to execute the step of controlling the target battery to charge and discharge based on the current charge and discharge power spectrum until the battery management system enters a dormant state.

[0105] In an embodiment of the present invention, a control device for battery charge and discharge power is provided, which is applied to a battery management system, and the device includes: when the battery management system is in an activated state, determining the current charge and discharge power spectrum, and controlling the target battery to charge and discharge based on the current charge and discharge power spectrum; when the target battery is charged and discharged according to the current charge and discharge power spectrum, when the charge and discharge time and the charge and discharge power meet the switching condition, the current charge and discharge power spectrum is switched to the target charge and discharge power spectrum corresponding to the switching condition, and the target battery is controlled to charge and discharge based on the target charge and discharge power spectrum; the target charge and discharge power spectrum is used as the current charge and discharge power spectrum, and the step of controlling the target battery to charge and discharge based on the current charge and discharge power spectrum is returned until the battery management system enters a dormant state. It can be seen from the above description that when the control device of the present invention switches the charge and discharge power spectrum, the charge and discharge time and the charge and discharge power both need to meet the switching condition, which is more scientific, and can fully utilize the charge and discharge performance of the battery under the premise of ensuring the safety of the battery. At the same time, it can be switched between multiple charge and discharge power spectra at will, which is more flexible, alleviating the technical problems that the existing control method of battery charge and discharge power is not scientific enough, has poor flexibility, and cannot fully utilize the charge and discharge performance of the battery under the premise of ensuring the safety of the battery.

[0106] Optionally, the switching conditions include: a time condition for switching the charge and discharge power spectrum and a power condition for switching the charge and discharge power spectrum, wherein the time condition for switching the charge and discharge power spectrum is determined based on the charge and discharge time corresponding to multiple charge and discharge power spectra, and the power condition for switching the charge and discharge power spectrum is determined based on the weighted sum of the maximum allowable charge and discharge powers corresponding to multiple charge and discharge power spectra.

[0107] Optionally, the determination unit is also used to: obtain the charge state information and temperature information obtained by real-time detection; match the detected charge state information and temperature information with the current charge and discharge power spectrum; determine the corresponding maximum allowable charge and discharge power according to the matching result, and send the determined maximum allowable charge and discharge power to the vehicle control system, so that the vehicle control system controls the target battery to charge and discharge according to the determined maximum allowable charge and discharge power.

[0108] Optionally, when the current charge and discharge power spectrum is the charge and discharge power spectrum with the largest power among multiple charge and discharge power spectra, and the voltage of the target battery meets the voltage condition of power reduction, the determination unit is also used to: obtain the charge state information and temperature information obtained by real-time detection; match the charge state information and temperature information obtained by detection with the current charge and discharge power spectrum; determine the corresponding maximum allowable charge and discharge power according to the matching result, and multiply the determined maximum allowable charge and discharge power by a preset ratio to obtain the target maximum allowable charge and discharge power; send the target maximum allowable charge and discharge power to the vehicle control system, so that the vehicle control system controls the target battery to charge and discharge according to the target maximum allowable charge and discharge power.

[0109] Optionally, the device is also used for: when the vehicle control system controls the target battery to charge and discharge according to the target maximum allowable charge and discharge power, and the voltage of the target battery meets the voltage condition for power increase, adjusting the charge and discharge power of the target battery to the maximum allowable charge and discharge power corresponding to the charge and discharge power spectrum with the largest power among multiple charge and discharge power spectra; when the vehicle control system controls the target battery to charge and discharge according to the target maximum allowable charge and discharge power, and the voltage of the target battery does not meet the voltage condition for power increase, continuing to control the target battery to charge and discharge according to the target maximum allowable charge and discharge power until the voltage of the target battery meets the voltage condition for power increase, and then adjusting the charge and discharge power of the target battery to the maximum allowable charge and discharge power corresponding to the charge and discharge power spectrum with the largest power among multiple charge and discharge power spectra.

[0110] Optionally, when the control of charging and discharging the target battery based on the current charge and discharge power spectrum is switched to the control of charging and discharging the target battery based on the target charge and discharge power spectrum, a preset power increase and decrease speed is met.

[0111] Optionally, the multiple charging and discharging power spectra include: three discharging power spectra and two charging power spectra.

[0112] The device provided in the embodiment of the present invention has the same implementation principle and technical effects as those of the aforementioned method embodiment. For the sake of brief description, for matters not mentioned in the device embodiment, reference may be made to the corresponding contents in the aforementioned method embodiment.

[0113] like Figure 8 As shown, an electronic device 600 provided in an embodiment of the present application includes: a processor 601, a memory 602 and a bus, wherein the memory 602 stores machine-readable instructions executable by the processor 601. When the electronic device is running, the processor 601 communicates with the memory 602 through the bus, and the processor 601 executes the machine-readable instructions to perform the steps of the battery charging and discharging power control method as described above.

[0114] Specifically, the above-mentioned memory 602 and processor 601 can be general-purpose memories and processors, which are not specifically limited here. When the processor 601 runs the computer program stored in the memory 602, the above-mentioned battery charging and discharging power control method can be executed.

[0115] The processor 601 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 601. The above processor 601 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module may be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 602, and the processor 601 reads the information in the memory 602 and completes the steps of the above method in combination with its hardware.

[0116] Corresponding to the above-mentioned battery charging and discharging power control method, an embodiment of the present application also provides a computer-readable storage medium, which stores machine-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to execute the steps of the above-mentioned battery charging and discharging power control method.

[0117] The battery charge and discharge power control device provided in the embodiment of the present application can be specific hardware on the device or software or firmware installed on the device. The device provided in the embodiment of the present application, its implementation principle and the technical effect produced are the same as those in the aforementioned method embodiment. For the sake of brief description, the parts not mentioned in the device embodiment can refer to the corresponding contents in the aforementioned method embodiment. It can be clearly understood by technicians in the relevant field that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can all refer to the corresponding processes in the aforementioned method embodiment, and will not be repeated here.

[0118] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0119] For another example, the flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the device, method and computer program product according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or the flowchart, and the combination of the boxes in the block diagram and / or the flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0120] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0121] In addition, each functional unit in the embodiments provided in the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0122] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for enabling an electronic device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the vehicle marking method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store program codes.

[0123] It should be noted that similar numbers and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and are not to be understood as indicating or implying relative importance.

[0124] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solution of the present application, rather than to limit it. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solution recorded in the aforementioned embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiment of the present application. They should all be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for controlling battery charging and discharging power, characterized in that: Applied to a battery management system, the method comprises: When the battery management system is in an activated state, determine the current charge and discharge power spectrum, and obtain the state of charge information and temperature information detected in real time; match the detected state of charge information and temperature information with the current charge and discharge power spectrum; and control the target battery to charge and discharge according to the matching result, wherein the battery management system stores multiple charge and discharge power spectra of the target battery, each charge and discharge power spectrum containing the maximum allowable charge and discharge power corresponding to the target battery at each state of charge and each temperature; When the target battery is charged and discharged according to the current charge and discharge power spectrum, when the charge and discharge time and the charge and discharge power meet the switching condition, the current charge and discharge power spectrum is switched to the target charge and discharge power spectrum corresponding to the switching condition, and the target battery is controlled to charge and discharge based on the target charge and discharge power spectrum, wherein, when the time for the target battery to be charged and discharged according to the current charge and discharge power spectrum meets the time condition for switching the charge and discharge power spectrum, and the average power of the target battery to be charged and discharged according to the current charge and discharge power spectrum meets the power condition for switching the charge and discharge power spectrum, the current charge and discharge power spectrum is switched to the target charge and discharge power spectrum corresponding to the switching condition, and the power condition for switching the charge and discharge power spectrum is determined based on the weighted sum of the maximum allowable charge and discharge powers corresponding to multiple charge and discharge power spectra; The target charge and discharge power spectrum is used as the current charge and discharge power spectrum, and the step of controlling the target battery to charge and discharge based on the current charge and discharge power spectrum is returned to be executed until the battery management system enters a dormant state.

2. The method according to claim 1, characterized in that The switching condition includes: a time condition for switching the charge and discharge power spectrum and a power condition for switching the charge and discharge power spectrum, wherein the time condition for switching the charge and discharge power spectrum is determined based on the charge and discharge time corresponding to a plurality of charge and discharge power spectra.

3. The method according to claim 1, characterized in that: Control the target battery to charge and discharge according to the matching results, including: The corresponding maximum allowable charge and discharge power is determined according to the matching result, and the determined maximum allowable charge and discharge power is sent to the vehicle control system, so that the vehicle control system controls the target battery to charge and discharge according to the determined maximum allowable charge and discharge power.

4. The method according to claim 1, characterized in that: When the current charge and discharge power spectrum is the charge and discharge power spectrum with the largest power among the multiple charge and discharge power spectrums, and the voltage of the target battery meets the voltage condition of power reduction, the target battery is controlled to be charged and discharged according to the matching result, further comprising: Determine the corresponding maximum allowable charge and discharge power according to the matching result, and multiply the determined maximum allowable charge and discharge power by a preset ratio to obtain a target maximum allowable charge and discharge power; The target maximum allowable charge and discharge power is sent to a vehicle control system, so that the vehicle control system controls the target battery to charge and discharge according to the target maximum allowable charge and discharge power.

5. The method according to claim 4, characterized in that The method further comprises: When the vehicle control system controls the target battery to charge and discharge according to the target maximum allowable charge and discharge power, and the voltage of the target battery meets the voltage condition of power increase, the charge and discharge power of the target battery is adjusted to the maximum allowable charge and discharge power corresponding to the charge and discharge power spectrum with the largest power among the multiple charge and discharge power spectra; When the vehicle control system controls the target battery to charge and discharge according to the target maximum allowable charge and discharge power, and the voltage of the target battery does not meet the voltage condition for power increase, the target battery continues to be controlled to charge and discharge according to the target maximum allowable charge and discharge power until the voltage of the target battery meets the voltage condition for power increase, and then the charge and discharge power of the target battery is adjusted to the maximum allowable charge and discharge power corresponding to the charge and discharge power spectrum with the largest power among the multiple charge and discharge power spectra.

6. The method according to claim 1, characterized in that When controlling the target battery to charge and discharge based on the current charge and discharge power spectrum is switched to controlling the target battery to charge and discharge based on the target charge and discharge power spectrum, a preset power rise and fall speed is met.

7. The method according to claim 2, characterized in that The multiple charging and discharging power spectra include: three discharging power spectra and two charging power spectra.

8. A battery charging and discharging power control device, using the control method according to any one of claims 1 to 7, characterized in that: Applied to a battery management system, the device comprises: A determination unit, used to determine the current charge and discharge power spectrum when the battery management system is in an activated state, and obtain the state of charge information and temperature information detected in real time; match the detected state of charge information and temperature information with the current charge and discharge power spectrum; and control the target battery to charge and discharge according to the matching result, wherein the battery management system stores multiple charge and discharge power spectra of the target battery, each charge and discharge power spectrum containing the maximum allowable charge and discharge power corresponding to the target battery at each state of charge and each temperature; A switching unit, used for, when the target battery is charged and discharged according to the current charge and discharge power spectrum, when the charge and discharge time and the charge and discharge power meet the switching condition, switching the current charge and discharge power spectrum to the target charge and discharge power spectrum corresponding to the switching condition, and controlling the target battery to charge and discharge based on the target charge and discharge power spectrum, wherein, when the time for the target battery to be charged and discharged according to the current charge and discharge power spectrum meets the time condition for the charge and discharge power spectrum switching, and the average power of the target battery to be charged and discharged according to the current charge and discharge power spectrum meets the power condition for the charge and discharge power spectrum switching, switching the current charge and discharge power spectrum to the target charge and discharge power spectrum corresponding to the switching condition, and the power condition for the charge and discharge power spectrum switching is determined based on the weighted sum of the maximum allowable charge and discharge powers corresponding to multiple charge and discharge power spectra; The return execution unit is used to use the target charge and discharge power spectrum as the current charge and discharge power spectrum, and return to execute the step of controlling the target battery to charge and discharge based on the current charge and discharge power spectrum until the battery management system enters a dormant state.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores machine-executable instructions. When the machine-executable instructions are called and executed by a processor, the machine-executable instructions cause the processor to execute the method according to any one of claims 1 to 7.

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