A battery online whole group repair and energy guarantee device and method

Abstract

The present invention relates to an online whole-group repair and energy guarantee device and method for storage batteries, which belongs to the technical field of storage batteries and solves the problem of ripple interference of ripples generated by the repair device when it is working on the equipment and the surrounding environment. The device includes a core control processing unit that controls the constant current source power amplifier unit in time-sharing to generate a high-frequency composite harmonic current applied to each single battery; a battery composite harmonic high-frequency impedance measurement unit collects the high-frequency voltage value of each single battery corresponding to the high-frequency composite harmonic current signal and provides it to the core control processing unit; the core control processing unit calculates the high-frequency impedance of each single battery based on the high-frequency composite harmonic current and high-frequency voltage value, and calculates and updates the filter capacitance value based on the sum of the high-frequency impedances of other single batteries and the high-frequency frequency; the synchronous filter network unit connects the filter capacitor matching the capacitance value in real time to perform ripple interference filtering. The ripple interference is filtered out in real time by the filter network unit that matches the impedance of the entire group of batteries.

Description

Technical Field

[0001] The present invention relates to the technical field of storage batteries, and in particular to a device and method for online whole-group repair and energy protection of storage batteries. Background Art

[0002] Lead-acid batteries are batteries whose electrodes are mainly made of lead and its oxides, and whose electrolyte is sulfuric acid solution. However, the short service life of lead-acid batteries is their main shortcoming. Completely solving the fatal defects of lead-acid batteries, such as short service life and rapid capacity decline caused by sulfidation, has become a major research direction in battery energy security technology.

[0003] The failure of lead-acid batteries is closely related to the production process, usage, environment and other factors. The failure of the battery is caused by water loss and sulfidation, which increases the internal resistance of the battery. After the battery capacity decreases, the charging process generates heat, which accelerates water loss and sulfidation. When the electrolyte density reaches a certain level, the plate softens, corrodes, bulges and even the battery is scrapped. Therefore, sulfidation (crystallization of lead sulfate) is the root cause of battery failure.

[0004] The causes of battery sulfation include the following abnormal use: high current discharge, low current deep discharge, untimely charging, long-term storage, and no discharge under long-term floating charge conditions.

[0005] When a lead-acid battery is operating in a discharge state, lead sulfate is formed in the electrolyte. When the concentration of lead sulfate reaches a certain threshold, crystallization occurs. The crystallized lead sulfate can no longer participate in the circulation reaction, thereby causing the capacity of the lead-acid battery to decrease.

[0006] Lead-acid batteries are widely used in power storage, data centers and base stations in the power, military, transportation, communications, and financial industries, as backup power sources for various equipment operating in harsh environments. The manual maintenance costs of batteries are high, so there is a broad market and technical demand for online maintenance of batteries and extension of battery life through desulfurization. Online maintenance and desulfurization technology for lead-acid batteries has huge market space and far-reaching socio-economic significance in terms of green environmental development and social energy conservation.

[0007] Currently, the commonly used method for repairing sulfurized lead-acid batteries is high-frequency resonance repair, which is to generate high-frequency resonant current to resonate with the already sulfurized lead sulfate crystals, thereby breaking up the lead sulfate crystals so that the lead sulfate crystals can re-participate in the cycle reaction, ultimately achieving the purpose of restoring the battery capacity.

[0008] According to the principles of atomic physics and solid-state physics, sulfur ions have five different energy levels. Ions that are usually in a metastable energy level tend to migrate to the most stable covalent bond energy level. At the lowest energy level (i.e., the covalent bond energy level), sulfur exists in the form of a ring molecule containing 8 atoms. The ring molecule pattern of these 8 atoms is a stable combination that is difficult to break, forming the battery's non-quasi-sulfation - sulfide. If this happens many times, a layer of lead sulfate crystals similar to an insulating layer will be formed.

[0009] To break the bondage of these sulfate layers, the energy level of the atoms must be raised to a certain level. At this time, the electrons in the outer atomic bands are activated to the next higher energy band, freeing the atoms from bondage. Each specific energy level has a unique resonant frequency, and some energy must be provided to enable the activated molecules to migrate to a higher energy level. Too low energy cannot meet the energy requirements for the transition, but too high energy will make the atoms that have already escaped from bondage and transitioned in an unstable state and fall back to the original energy level. Therefore, it is necessary to use multiple resonances to free them from bondage and reach the most active energy level without falling back to the original energy level. In this way, they are converted into free ions dissolved in the electrolyte and participate in the electrochemical reaction.

[0010] When repairing lead-acid batteries, the corresponding resonant frequencies of crystals with different lead sulfate grain sizes will also be different. If a pulse current with a steep front is used, the Fourier series is used for frequency analysis to know that the pulse will produce rich harmonic components, with a large amplitude in the low-frequency part and a small amplitude in the high-frequency part. In this way, large lead sulfate crystals obtain a lot of energy, and small lead sulfate crystals obtain a little energy. The principle of high-frequency oscillation waveform repair and maintenance technology is to use high-frequency oscillation waveform energy to impact coarse lead sulfate grains, so that its pulse frequency resonates with the inherent frequency of the lead sulfate crystals. When the energy is sufficient, the lead sulfate crystals that cannot be restored by charging in the actual use environment of the battery are broken and dissolved in the sulfuric acid electrolyte, and re-participate in the chemical reaction, thereby extending the battery life and improving the safety and reliability of the power system.

[0011] In the existing online battery repair process, a high-frequency oscillation waveform is applied to the running battery pack. To achieve the purpose of repair, the high-frequency oscillation waveform needs to have the following characteristics: 1. sufficient energy, 2. rich frequency characteristics. Due to its inherent waveform characteristics, high-frequency oscillation will inevitably generate electromagnetic ripples, which will cause operational safety hazards to other equipment connected to the battery circuit.

[0012] In order to reduce the impact of ripple interference on the running equipment and environment, the traditional ripple interference reduction technology is to reduce the ripple effect by adding a filter circuit to the equipment. However, due to the above characteristics, the high-frequency oscillation pulse waveform will be composed of waveforms of different frequencies and amplitudes, with a large amplitude in the low-frequency part and a small amplitude in the high-frequency part. In this way, it can be ensured that the energy obtained by the large lead sulfate crystal is large and the energy obtained by the small lead sulfate crystal is small. There are certain shortcomings in the traditional filter circuit using a fixed filter capacitor for filtering: 1. The frequency of the high-frequency oscillation waveform is different before and after, and the same capacitor cannot filter out all ripples; 2. During the repair process of the battery, the impedance is constantly changing, and the fixed capacitor cannot filter the ripple under different impedance conditions. 3. Relying on the fixed DC impedance of the battery cannot truly reflect the high-frequency impedance of the battery during high-frequency repair, so the selected filter capacitor cannot achieve the actual filtering effect. A simple filter circuit that is not adapted to the changing frequency and the changing high-frequency impedance cannot completely filter the ripple generated by the pulse waveform. Therefore, how to filter out the ripple interference to the system derived from the current battery desulfurization repair technology using high-frequency oscillation waveform is a key technical bottleneck restricting the promotion and development of online maintenance technology. It also indirectly results in a large number of battery resources not being able to play their full role and high maintenance costs, which is contrary to the current social development ideas of green environmental protection and energy conservation. Summary of the invention

[0013] In view of the above analysis, an embodiment of the present invention aims to provide an online battery whole-group repair and energy protection device to solve the problem of ripple interference of the existing battery online repair and energy protection circuit on the equipment connected to the battery group and the surrounding environment.

[0014] On the one hand, an embodiment of the present invention provides an online whole-group repair and energy guarantee device for storage batteries, comprising: a core control processing unit, which is used to time-share control a constant current source power amplifier unit to generate a high-frequency composite harmonic current applied to each single battery in the whole group of battery cells; a battery composite harmonic high-frequency impedance measurement unit, which is used to collect the high-frequency voltage value of each single battery corresponding to the high-frequency composite harmonic current and provide it to the core control processing unit; the core control processing unit is also used to calculate the high-frequency impedance of each single battery in the whole group of battery cells based on the high-frequency composite harmonic current and the high-frequency voltage value, and calculate the filter capacitance value based on the sum of the high-frequency impedances of other single batteries in the whole group of battery cells except the single battery currently being repaired and the high-frequency frequency to update the filter capacitance value in the memory in real time, wherein the filter capacitance value changes with the high-frequency impedance of each single battery during the repair process of the whole group of battery cells; and a synchronous filtering network unit, which is used to connect the filter capacitor matching the capacitance value in the synchronous filtering network unit in real time based on the control of the core control processing unit to perform ripple interference filtering.

[0015] The beneficial effects of the above technical solution are as follows: the battery energy online maintenance device must not only repair and maintain the battery through high-frequency composite harmonics, but also prevent the high-frequency composite harmonics from causing ripple interference to the environment and other circuits and electrical equipment connected to the battery, so comprehensive considerations are required in the design; the entire battery unit is composed of individual single cells. If a single high-frequency composite harmonic is applied to repair and maintain the entire battery at the same time, this waveform will be applied to the external circuit at the same time to form ripple interference. If a filter capacitor is added, the waveform signal strength will be weakened and the repair effect will not be achieved. This is a contradiction. Therefore, this device repairs and maintains each single cell in the entire battery group in a time-sharing manner, repairs the single cell with high-frequency composite harmonics, and at the same time filters the ripple interference generated by the high-frequency composite harmonics through a filter network unit that matches the impedance of the entire battery group, thereby realizing a unified design idea and principle for repairing and maintaining the single cell and filtering the entire battery group to the outside.

[0016] Based on further improvement of the above-mentioned device, the core control processing unit is used to calculate the initial capacitance value based on the sum of the default high-frequency impedances of other single cells in the entire group of battery cells except the single cell currently being repaired and the high-frequency frequency within the first repair cycle of the first repair cycle, and store the initial capacitance value in the memory as a filter capacitance value, wherein multiple repair cycles include a first repair cycle and subsequent repair cycles, and each repair cycle includes a first repair cycle and subsequent repair cycles.

[0017] Based on the further improvement of the above device, the core control processing unit is used to calculate the filter capacitance value corresponding to different high frequency frequencies by the following formula when repairing the single battery K:

[0018] C1=1 / (2π*Rkn-1*F1);

[0019] C2=1 / (2π*Rkn-1*F2);

[0020] C3=1 / (2π*Rkn-1*F3);

[0021] Among them, Rkn-1 represents the sum of the high-frequency impedances of the other single cells in the entire group of battery cells except the single cell K currently being repaired, Rkn-1 = (R1 +...... + RN) - RK, F1, F2 and F3 are respectively the three high-frequency frequencies contained in the high-frequency composite harmonic current signal, among which F1 = 7kHz; F2 = 8.5kHz; F3 = 10kHz.

[0022] Based on the further improvement of the above-mentioned device, the PWM output interface of the core control processing unit is connected to the input end of the constant current source power amplifier unit, the constant current source power amplifier unit generates a high-frequency composite harmonic current based on the PWM signal, and outputs a positive high-frequency composite harmonic current I+ and a negative high-frequency composite harmonic current I- through the positive output end and the negative output end of the constant current source power amplifier unit respectively.

[0023] Based on the further improvement of the above device, the whole group of battery units includes N single cells and N pairs of battery selection switches, each pair of battery selection switches is used to connect one of the N single cells according to the switch control signal provided by the core control processing unit, wherein the positive output end and the negative output end of the constant current source amplifier unit are connected to one end of each pair of battery selection switches in the N pairs of battery selection switches; the other end of each pair of battery selection switches is connected to the positive and negative electrodes of a corresponding single cell; and the core control processing unit is connected to the control ends of the N pairs of battery selection switches via N switch control signal interfaces B, respectively, wherein the first switch control signal to the Nth switch control signal are provided to the control ends of the N pairs of battery selection switches in a time-sharing manner via the N switch control signal interfaces B in each repair cycle.

[0024] Based on the further improvement of the above device, the battery composite harmonic high-frequency impedance measurement unit includes an operational amplifier, a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor, a third capacitor and a voltage regulator, wherein the reverse input terminal of the operational amplifier is connected to one end of the first capacitor via the first resistor, and the other end of the first capacitor is connected to the positive output terminal of the constant current source power amplifier unit; the positive input terminal of the operational amplifier is connected to the second node via the second resistor, the second node is connected to the reference voltage terminal and to one end of the second capacitor, and the other end of the second capacitor is connected to the negative output terminal of the constant current source power amplifier unit; the output terminal of the operational amplifier is connected to the reverse input terminal of the operational amplifier via the third resistor, connected to the analog quantity acquisition interface of the core control processing unit and grounded via a voltage regulator diode; the positive power supply terminal of the operational amplifier is grounded and connected to the forward voltage source via the third capacitor, and the negative power supply terminal of the operational amplifier is grounded.

[0025] Based on further improvements of the above device, the synchronous filtering network unit is arranged in a multi-layer high-speed circuit board, and the synchronous filtering network unit includes multiple capacitors and multiple high-frequency electronic switches, and the multiple capacitors include m uF-level capacitors, m nF-level capacitors and m pF-level capacitors, wherein each capacitor is connected to the filtering system through one of the multiple high-frequency electronic switches.

[0026] Based on the further improvement of the above device, the multiple high-frequency electronic switches are 3m high-frequency electronic switches, and the 3m high-frequency electronic switches connect the capacitors in the synchronous filtering network unit that match the capacitance value according to the switch control signal A, wherein one end of the 3m high-frequency electronic switches is respectively connected to one end of the corresponding 3m capacitors, and the other ends of the 3m capacitors are all connected to the positive output end of the entire group of battery cells and to the positive end of the external electrical equipment; the other ends of the 3m high-frequency electronic switches are all connected to the negative output end of the entire group of battery cells and to the negative end of the external electrical equipment; the control ends of the 3m high-frequency electronic switches are respectively connected to 3m switch control signal interfaces A of the core control processing unit, wherein the core control processing unit generates the switch control signal A based on the capacitance value stored in the memory, and the switch control signal A is provided to the corresponding 3m high-frequency electronic switches via the 3m switch control signal interfaces A.

[0027] On the other hand, an embodiment of the present invention provides a method for online whole-group repair and energy assurance of a storage battery, comprising: in each repair cycle, a core control processing unit is used to time-share control a constant current source power amplifier unit to generate a high-frequency composite harmonic current signal applied to each single battery in the whole group of battery cells; a battery composite harmonic high-frequency impedance measurement unit is used to collect the high-frequency voltage value of each single battery corresponding to the high-frequency composite harmonic current signal in each repair cycle and provide the high-frequency voltage value to the core control processing unit; the core control processing unit calculates the high-frequency impedance of each single battery in the whole group of battery cells based on the high-frequency composite harmonic current signal and the high-frequency voltage value, wherein a plurality of repair cycles include a first repair cycle and subsequent repair cycles, and each repair cycle includes a first repair cycle and a subsequent repair cycle; in the subsequent repair cycles of the first repair cycle and the subsequent repair cycles In the embodiment, the core control processing unit calculates the filter capacitance value based on the sum of the high-frequency impedances of the other single cells in the entire group of battery cells except the single cell currently being repaired and the high-frequency frequency, and updates the filter capacitance value stored in the memory in real time, wherein, in the first repair cycle of the first repair cycle, the initial capacitance value is calculated based on the sum of the default high-frequency impedances of the other single cells in the entire group of battery cells except the single cell currently being repaired and the high-frequency frequency, and the initial capacitance value is stored in the memory as the filter capacitance value, and the filter capacitance value changes with the high-frequency impedance of each single cell during the repair process of the entire group of battery cells; and in the subsequent repair cycles of the first repair cycle and the subsequent repair cycles, the core control processing unit connects the filter capacitor in the synchronous filter network unit that matches the filter capacitance value in real time to perform ripple interference filtering.

[0028] Based on further improvement of the above method, the method for online whole-group repair and energy assurance of storage batteries also includes: applying high-frequency composite harmonic current to each single battery in the whole group of battery cells in a time-sharing manner through a battery selection switch, wherein the high-frequency composite harmonic current is applied to the single battery to form a separate circuit, and at the same time, the high-frequency composite harmonic circuit signal is used as a signal source, and a ripple interference source circuit that generates external radiation interference to the external circuit and environment through the high-frequency impedance of the other N-1 single batteries in the whole group of battery cells can be used to repair each single battery in the whole group of battery cells, and the impedance matching filter capacitors of other single batteries in the whole group of battery cells can be used to suppress ripple interference.

[0029] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0030] 1. The online maintenance device for battery energy must not only repair and maintain the battery through high-frequency composite harmonics, but also prevent the high-frequency composite harmonics from causing ripple interference to the environment and other circuits and electrical equipment connected to the battery. Therefore, comprehensive considerations are required in the design; the entire battery unit is composed of individual cells. If a single high-frequency composite harmonic is applied to repair and maintain the entire battery at the same time, this waveform will be applied to the external circuit at the same time to form ripple interference. If a filter capacitor is added, the waveform signal strength will be weakened and the repair effect will not be achieved. This is a contradiction. Therefore, this device repairs and maintains each single cell in the entire battery group in a time-sharing manner, repairs the single cell with high-frequency composite harmonics, and filters the ripple interference generated by the high-frequency composite harmonics through a filter network unit that matches the impedance of the entire battery group, realizing a unified design idea and principle for repairing and maintaining the single cell and filtering the entire battery group to the outside.

[0031] 2. By measuring the composite harmonic high-frequency impedance of each battery in the whole battery group, the high-frequency impedance of each single battery during high-frequency composite harmonic repair is obtained, which provides the corresponding composite harmonic high-frequency impedance for the device to suppress ripple interference, rather than the battery DC resistance under static state. This ensures that the device can suppress the ripple interference to below the national standard through resistance-capacitance filtering, thus solving the technical problem of ripple interference caused by online maintenance of lead-acid batteries.

[0032] 3. Different from the traditional fixed RC filter matching circuit, the synchronous filter network unit can dynamically match the filter capacitor value according to the changes in the high-frequency impedance of the battery composite harmonics to achieve the optimal ripple suppression effect.

[0033] 4. Realize the online maintenance of lead-acid batteries and the simultaneous measurement of composite harmonic high-frequency impedance, simplify the complex battery impedance test circuit, and through the time-sharing battery repair and periodic dynamic impedance measurement method, match the dynamic changing filter capacitor with the impedance of the whole battery group to achieve the suppression of external ripple interference of high-frequency composite harmonics, and reduce the ripple interference of the whole battery group to an extremely low level.

[0034] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0036] Figure 1 A block diagram of a battery online whole-group repair and energy guarantee device according to an embodiment of the present invention;

[0037] Figure 2A and Figure 2B They are respectively a working principle diagram and an equivalent analysis circuit diagram of a battery online whole-group repair and energy guarantee device according to an embodiment of the present invention;

[0038] Figure 3 A circuit diagram of a battery composite harmonic high-frequency impedance measurement principle according to an embodiment of the present invention;

[0039] Figure 4 A circuit diagram of a battery composite harmonic high-frequency impedance measurement unit according to an embodiment of the present invention;

[0040] Figure 5 A circuit diagram of the synchronous filtering principle of the online whole-group repair and energy guarantee device for batteries according to an embodiment of the present invention;

[0041] Figure 6 A high-frequency composite harmonic current waveform diagram according to an embodiment of the present invention; and

[0042] Figure 7 The present invention is a flowchart of a method for online whole-group battery repair and energy assurance according to an embodiment of the present invention. DETAILED DESCRIPTION

[0043] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0044] A specific embodiment of the present invention, referring to Figure 1 , discloses an online whole-group repair and energy guarantee device for storage batteries, including: a core control processing unit 100, used for time-sharing control of a constant current source power amplifier unit 130 to generate a high-frequency composite harmonic current applied to each single battery in a whole group of battery cells 140; a battery composite harmonic high-frequency impedance measurement unit 110, used for collecting the high-frequency voltage value of each single battery corresponding to the high-frequency composite harmonic current and providing it to the core control processing unit 100; the core control processing unit 100 is also used for calculating the high-frequency impedance of each single battery in the whole group of battery cells 140 based on the high-frequency composite harmonic current and the high-frequency voltage value, and calculating the filter capacitance value based on the sum of the high-frequency impedances of other single batteries in the whole group of battery cells 140 except the single battery currently being repaired and the high-frequency frequency to update the filter capacitance value in the memory in real time, wherein the filter capacitance value changes with the high-frequency impedance of each single battery during the repair process of the whole group of battery cells 140; and a synchronous filter network unit 120, used for, based on the control of the core control processing unit 100, connecting the filter capacitor in the synchronous filter network unit 120 with the capacitance value matching to perform ripple interference filtering in real time.

[0045] Compared with the prior art, the battery online repair and energy guarantee device provided in this embodiment, the battery energy online maintenance device, not only needs to realize the repair and maintenance of the battery through high-frequency composite harmonics, but also needs to prevent the high-frequency composite harmonics from causing ripple interference to the environment and other circuits and electrical equipment connected to the battery, so comprehensive consideration is required in the design; the whole battery unit is composed of individual single cells. If a single high-frequency composite harmonic is applied to repair and maintain the whole battery at the same time, this waveform will be applied to the external circuit at the same time to form ripple interference. If a filter capacitor is added, the waveform signal strength will be weakened and the repair effect will not be achieved. This is a contradiction. Therefore, this device repairs and maintains each single cell in the whole battery group in a time-sharing manner, repairs the single cell with high-frequency composite harmonics, and at the same time filters the ripple interference generated by the high-frequency composite harmonics through a filter network unit that matches the impedance of the whole battery group, realizing a unified design idea and principle for the repair and maintenance of the single cell and the external filtering of the whole battery group.

[0046] In the following, reference will be made to Figures 1 to 6, a battery online whole group repair and energy guarantee device according to an embodiment of the present invention is described in detail. The battery online whole group repair and energy guarantee device includes: a core control processing unit 100, a battery composite harmonic high frequency impedance measurement unit 110, a synchronous filter network unit 120, a constant current source amplifier unit 130 and a whole group battery unit 140.

[0047] refer to Figure 1 and Figure 3 The core control processing unit 100 is used to control the constant current source amplifier unit 130 in time-sharing in each repair cycle to generate a high-frequency composite harmonic current applied to each single battery in the entire battery unit 140. Specifically, the constant current source amplifier unit 130 is connected to the input end of the constant current source amplifier unit 130 via the PWM output interface of the core control processing unit 100, and the constant current source amplifier unit 130 generates a high-frequency composite harmonic current based on the PWM signal, and outputs a positive high-frequency composite harmonic current I+ and a negative high-frequency composite harmonic current I- through the positive output end and the negative output end of the constant current source amplifier unit 130. The multiple repair cycles include a first repair cycle and a subsequent repair cycle, and each repair cycle includes a first repair cycle and a subsequent repair cycle.

[0048] refer to Figure 1 and Figure 4 The battery composite harmonic high-frequency impedance measurement unit 110 is used to collect the high-frequency voltage value of each single battery corresponding to the high-frequency composite harmonic current in each repair cycle and provide it to the core control processing unit 100. The battery composite harmonic high-frequency impedance measurement unit 110 includes an operational amplifier U12A, a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a regulator VD1.

[0049] Specifically, the inverting input terminal 2 of the operational amplifier U12A is connected to one end of the first capacitor C1 via the first resistor R1, and the other end of the first capacitor C1 is connected to the positive output terminal of the constant current source amplifier unit 130. The positive input terminal 3 of the operational amplifier U12A is connected to the second node via the second resistor R2, the second node is connected to the reference voltage terminal V1.25 and to one end of the second capacitor C2, and the other end of the second capacitor C2 is connected to the negative output terminal of the constant current source amplifier unit 130. The output terminal 1 of the operational amplifier U12A is connected to the inverting input terminal of the operational amplifier U12A via the third resistor R3, connected to the analog quantity acquisition interface of the core control processing unit 100 and grounded via the voltage regulator diode VD1. The positive power supply terminal of the operational amplifier U12A is grounded via the third capacitor C3 and connected to the forward voltage source AVCC, and the negative power supply terminal of the operational amplifier U12A is grounded.

[0050] refer to Figure 1 and Figure 3 , the core control processing unit 100 is used to calculate the high-frequency impedance of each single cell in the entire group of battery cells 140 based on the high-frequency composite harmonic current and the high-frequency voltage value in each repair cycle. The core control processing unit 100 is used to calculate the filter capacitance value based on the sum of the high-frequency impedances of the single cells in the entire group of battery cells 140 except the single cell currently being repaired and the high-frequency frequency in the subsequent repair cycles of the first repair cycle and in the subsequent repair cycles to update the filter capacitance value in the memory in real time, wherein the filter capacitance value changes with the high-frequency impedance of each single cell during the repair process of the entire group of battery cells 140. In addition, the core control processing unit 100 is used to calculate the initial capacitance value based on the sum of the default high-frequency impedances of the single cells in the entire group of battery cells 140 except the single cell currently being repaired and the high-frequency frequency in the first repair cycle of the first repair cycle, and store the initial capacitance value in the memory as the filter capacitance value.

[0051] Specifically, the core control processing unit 110 is used to calculate the filter capacitance values ​​C1, C2 and C3 corresponding to different high-frequency frequencies by the following formula when repairing the single battery K:

[0052] C1=1 / (2π*Rkn-1*F1);

[0053] C2=1 / (2π*Rkn-1*F2);

[0054] C3=1 / (2π*Rkn-1*F3);

[0055] Among them, Rkn-1 represents the sum of the high-frequency impedances of the other single cells in the entire battery unit 140 except the single cell K currently being repaired, Rkn-1 = (R1+......+RN)-RK, F1, F2 and F3 are respectively the three high-frequency frequencies contained in the high-frequency composite harmonic current signal, among which F1 = 7kHz; F2 = 8.5kHz; F3 = 10kHz.

[0056] The whole battery unit 140 includes N single cells and N pairs of battery selection switches K1, K2, ..., KN, each pair of battery selection switches is used to connect one of the N single cells according to the switch control signal provided by the core control processing unit 100. Specifically, the positive output terminal and the negative output terminal of the constant current source amplifier unit 130 are connected to one end of each pair of battery selection switches in the N pairs of battery selection switches K1, K2, ..., KN; the other end of each pair of battery selection switches is connected to the positive electrode and the negative electrode of a corresponding single cell; and the core control processing unit 100 is connected to the control ends of the N pairs of battery selection switches via N switch control signal interfaces B, respectively, wherein the first switch control signal to the Nth switch control signal are provided to the control ends of the N pairs of battery selection switches in a time-sharing manner via the N switch control signal interfaces B in each repair cycle.

[0057] The synchronous filtering network unit 120 is used to connect the filter capacitors in the synchronous filtering network unit 120 that match the capacitance value in real time to perform ripple interference filtering in the subsequent repair cycle of the first repair cycle and in the subsequent repair cycle based on the control of the core control processing unit 100. The synchronous filtering network unit 120 is arranged in a multi-layer high-speed circuit board, and the synchronous filtering network unit 120 includes a plurality of capacitors and a plurality of high-frequency electronic switches, and the plurality of capacitors include m uF-level filter capacitors, m nF-level filter capacitors, and m pF-level filter capacitors, wherein each capacitor is connected to the filter system through one of the plurality of high-frequency electronic switches.

[0058] The plurality of high-frequency electronic switches are 3m high-frequency electronic switches, and the 3m high-frequency electronic switches are connected to the filter capacitors in the synchronous filter network unit 120 that match the capacitance value according to the switch control signal A. One end of the 3m high-frequency electronic switches is respectively connected to one end of the corresponding 3m capacitors, and the other ends of the 3m capacitors are all connected to the positive output end of the entire battery unit group and to the positive end of the external power-consuming device; the other ends of the 3m high-frequency electronic switches are all connected to the negative output end of the entire battery unit group and to the negative end of the external power-consuming device; the control ends of the 3m high-frequency electronic switches are respectively connected to 3m switch control signal interfaces A of the core control processing unit, wherein the core control processing unit 100 generates the switch control signal A based on the capacitance value stored in the memory, and the switch control signal A is provided to the corresponding 3m high-frequency electronic switches via the 3m switch control signal interfaces A.

[0059] Another specific embodiment of the present invention discloses a method for online whole-group repair and energy assurance of a storage battery, including: in step S701, in each repair cycle, the core control processing unit time-sharingly controls the constant current source power amplifier unit to generate a high-frequency composite harmonic current signal applied to each single battery in the whole group of battery cells; in step S702, in each repair cycle, the battery composite harmonic high-frequency impedance measurement unit collects the high-frequency voltage value of each single battery corresponding to the high-frequency composite harmonic current signal and provides the high-frequency voltage value to the core control processing unit, and the core control processing unit calculates the high-frequency impedance of each single battery in the whole group of battery cells based on the high-frequency composite harmonic current signal and the high-frequency voltage value, wherein the multiple repair cycles include a first repair cycle and subsequent repair cycles, and each repair cycle includes a first repair cycle and subsequent repair cycles; in step S703, in the subsequent repair cycles of the first repair cycle In the loop and subsequent repair cycles, the core control processing unit calculates the filter capacitance value based on the sum of the high-frequency impedances of the other single cells in the entire group of battery cells except the single cell currently being repaired and the high-frequency frequency, and updates the filter capacitance value stored in the memory in real time, wherein, in the first repair cycle of the first repair cycle, the initial capacitance value is calculated based on the sum of the default high-frequency impedances of the other single cells in the entire group of battery cells except the single cell currently being repaired and the high-frequency frequency, and the initial capacitance value is stored in the memory as the filter capacitance value, and the filter capacitance value changes with the high-frequency impedance of each single cell during the repair process of the entire group of battery cells; and in step S704, in the subsequent repair cycles of the first repair cycle and the subsequent repair cycles, the core control processing unit connects the filter capacitor in the synchronous filtering network unit that matches the filter capacitance value in real time to perform ripple interference filtering.

[0060] The method for online whole-group repair and energy guarantee of storage batteries also includes: applying high-frequency composite harmonic current to each single battery in the whole group of battery units in a time-sharing manner through a battery selection switch, wherein the high-frequency composite harmonic current is applied to the single battery to form a separate circuit, and at the same time, the high-frequency composite harmonic circuit signal is used as a signal source, and a ripple interference source circuit that generates external radiation interference to the external circuit and environment is generated through the high-frequency impedance of the other N-1 single batteries in the whole group of battery units, which can not only repair each single battery in the whole group of battery units, but also use the impedance matching filter capacitors of other single batteries in the whole group of battery units to suppress ripple interference.

[0061] In the following, reference Figures 1 to 7 , the battery online whole group repair and energy protection device and method according to the embodiment of the present invention are described in detail in the form of specific examples.

[0062] refer to Figure 1The embodiment of the present invention provides an online whole-group repair and energy guarantee device for storage batteries, including a core control processing unit, a battery composite harmonic high-frequency impedance measurement unit, a synchronous filtering network unit, a constant current source amplifier unit, and a whole group of battery units. First, the core control processing unit controls the constant current source amplifier unit to apply a high-frequency composite harmonic current signal to a single cell in the whole group of battery cells for desulfurization and repair through time-sharing, and the core control processing unit synchronously starts the battery composite harmonic high-frequency impedance measurement unit to collect the high-frequency voltage value corresponding to the high-frequency current signal. The core control processing unit calculates and processes the high-frequency impedance of the single cell according to the applied high-frequency current value and its corresponding high-frequency voltage value. Through a repair cycle of each single cell in the whole battery unit, the high-frequency signal impedance of each single cell in the whole battery unit can be obtained. Immediately after the next repair cycle, in addition to continuing the above high-frequency current signal application and high-frequency signal impedance measurement, the synchronous filter network unit is simultaneously put into use to filter the output ripple of the high-frequency signal to the outside. The synchronous filter capacitor capacity selection is the capacitance value obtained by the core control processing unit after calculation and matching based on the combination of the impedance of other batteries except the battery currently undergoing high-frequency current signal repair and the high-frequency frequency. By controlling the synchronous filter network unit to connect the corresponding capacitance value to the filter circuit for filtering, the circuit design effect of the overall ripple generated is achieved, which is lower than the ripple output range required by the national standard. The core control processing unit continues to perform the above operations, and time-sharing control applies high-frequency composite harmonic current signals to all batteries in the whole battery group for repair and synchronous filtering at the same time, until the overall repair and energy guarantee effect and ideal low ripple output are completed.

[0063] The beneficial effects of the above technical solution are as follows: the battery energy online maintenance device must not only repair and maintain the battery through high-frequency composite harmonics, but also prevent the high-frequency composite harmonics from causing ripple interference to the environment and other circuits and electrical equipment connected to the battery, so comprehensive considerations are required in the design; the entire battery unit is composed of individual single cells. If a single high-frequency composite harmonic is applied to repair and maintain the entire battery at the same time, this waveform will be applied to the external circuit at the same time to form ripple interference. If a filter capacitor is added, the waveform signal strength will be weakened and the repair effect will not be achieved. This is a contradiction. Therefore, this device repairs and maintains each single cell in the entire battery group in a time-sharing manner, repairs the single cell with high-frequency composite harmonics, and at the same time filters the ripple interference generated by the high-frequency composite harmonics through a filter network unit that matches the impedance of the entire battery group, thereby realizing a unified design idea and principle for repairing and maintaining the single cell and filtering the entire battery group to the outside.

[0064] The whole battery unit is composed of N single cells. The device performs equivalent analysis on the pulse repair circuit and the ripple interference circuit, and analyzes and designs the dual-circuit circuit for battery repair and maintenance and ripple interference filtering. The device uses the battery selection switch to repair and maintain each single cell in the whole battery group by applying a high-frequency composite harmonic current signal. The high-frequency composite harmonic current signal of the pulse repair circuit is applied to the single cell to form a separate circuit. At the same time, the high-frequency composite harmonic signal is used as a signal source to generate a ripple interference source circuit that radiates external interference to the external circuit and environment through the impedance of the other N-1 single cells in the whole battery group. Based on the dual-circuit circuit analysis and design of battery repair and maintenance and ripple interference filtering, the repair and maintenance of each single cell in the battery group is guaranteed, and the impedance matching filter capacitor of other single cells in the battery group is used to achieve ripple interference suppression.

[0065] The traditional battery static impedance is the corresponding DC static impedance of the battery itself, while the dynamic high-frequency impedance when filtering high-frequency composite harmonics is different from the DC static impedance. The DC static impedance matching filter capacitor cannot achieve the ideal filtering effect. The impedance test of this device is a dynamic high-frequency impedance test, not a static impedance under normal conditions. The core control unit is equipped with a corresponding filter capacitor according to the dynamic high-frequency impedance to achieve an ideal filtering effect.

[0066] The measurement of high-frequency dynamic impedance is the high-frequency voltage value tested synchronously when applying high-frequency composite harmonics, and the high-frequency impedance converted by the core control unit; this device does not require additional test circuits, and impedance testing and battery maintenance are carried out simultaneously.

[0067] The synchronous filter network unit is composed of filter capacitors of different capacities, including a series of capacitors at the uF, nF, and pF levels; each capacitor is connected to the filter system through a high-frequency electronic switch, and the response time of the high-frequency electronic switch is at least 3 times the corresponding high-frequency composite harmonic frequency, ensuring that the application of high-frequency composite harmonics and the application of filter capacitors are synchronized. The filter network unit adopts a multi-layer high-speed circuit board design to reduce interference when the high-frequency switch is turned on.

[0068] Since the impedance increase or decrease of lead-acid batteries does not occur suddenly but is a long-term cumulative effect, in order to save energy, the measurement of high-frequency dynamic impedance is carried out in a certain period (for example, every 96 hours). During one measurement process, the dynamic impedance measurement of each single battery in the entire battery unit is completed, which serves as the basis for selecting the capacitor input of the filter network unit in this cycle.

[0069] The connection between each single battery and the power amplifier unit, and between each single battery and the battery composite harmonic high-frequency impedance measurement unit are all connected through independent controllable electronic switches. When not being repaired or impedance tested, each single battery is completely disconnected from the power amplifier unit and the battery composite harmonic high-frequency impedance measurement unit, thereby minimizing the interference of the static operation of the repair system on the environment and other equipment connected to the battery.

[0070] In the existing online battery repair process, a high-frequency oscillation waveform is applied to the running battery pack. To achieve the purpose of repair, the high-frequency oscillation waveform needs to have the following characteristics: 1. sufficient energy, 2. rich frequency characteristics. Due to its inherent waveform characteristics, high-frequency oscillation will inevitably generate electromagnetic ripples, which will cause operational safety hazards to other equipment connected to the battery circuit.

[0071] In order to reduce the impact of ripple interference on the running equipment and environment, the traditional ripple interference reduction technology is to reduce the ripple impact by adding a filter circuit to the equipment. However, due to the above characteristics, the high-frequency oscillation pulse waveform will be composed of waveforms of different frequencies and amplitudes, with a large amplitude in the low-frequency part and a small amplitude in the high-frequency part. In this way, it can be ensured that the energy obtained by large lead sulfate crystals is large and the energy obtained by small lead sulfate crystals is small. There are certain shortcomings in the traditional filter circuit using a fixed filter capacitor for filtering: 1. The frequency of the high-frequency composite harmonic waveform is different before and after, and the same capacitor cannot filter out all ripples; 2. During the repair process of the battery, the impedance is constantly changing, and the fixed capacitor cannot filter the ripple under different impedance conditions; 3. Relying on the fixed DC impedance of the battery cannot truly reflect the high-frequency impedance of the battery during high-frequency repair, so the selected filter capacitor cannot achieve the actual filtering effect.

[0072] A simple filter circuit that is not adapted to the changing frequency and the changing high-frequency impedance cannot completely filter the ripple generated by the pulse waveform. Therefore, how to filter the ripple interference to the system derived from the current battery desulfurization repair technology using high-frequency oscillation waveform is a key technical bottleneck restricting the promotion and development of online maintenance technology. It also indirectly causes a large number of battery resources to not play a 100% role and high maintenance and repair costs, which is contrary to the current social development ideas of green environmental protection and energy conservation.

[0073] A specific embodiment of the present invention is to provide a circuit and method for online whole-group repair and energy protection of batteries with dynamic ripple suppression, so as to solve the problem of ripple interference of existing online battery repair and energy protection circuits on equipment connected to the battery pack and the surrounding environment, thereby fundamentally solving the safety of the use of online battery maintenance equipment.

[0074] refer to Figure 1The battery online whole group repair and energy guarantee device comprises a core control processing unit 100, a battery composite harmonic high frequency impedance measurement unit 110, a synchronous filter network unit 120, a constant current source amplifier unit 130, and a whole group of battery units 140. A repair and energy guarantee repair cycle refers to a desulfurization and energy guarantee repair process of applying a high frequency composite harmonic current to each single cell in the whole group of battery units 140 in a time-sharing manner; a repair and energy guarantee cycle is a period of time consisting of multiple repair cycles.

[0075] First, in the first repair cycle of a repair and energy guarantee period, the core control processing unit 100 controls the application of high-frequency composite harmonic current signals to each single cell in the entire battery group through the constant current source amplifier unit 130 for desulfurization repair. The core control processing unit 100 synchronously starts the battery composite harmonic high-frequency impedance measurement unit 110 to collect the high-frequency voltage value of each single cell corresponding to the high-frequency current signal. The core control processing unit 100 calculates and processes the high-frequency impedance of each single cell according to the applied high-frequency current value and its corresponding high-frequency voltage value.

[0076] Furthermore, in a subsequent repair cycle of a repair and energy assurance period, the core control processing unit 100 calculates the capacitance value required for filtering out ripple interference when each single cell performs composite harmonic current repair and energy assurance based on the measured high-frequency impedance of each single cell in the entire battery group and the frequency value contained in the high-frequency composite harmonic current signal, and stores it in the memory of the core control processing unit 100.

[0077] Furthermore, in a subsequent repair cycle of a repair and energy guarantee cycle, the core control processing unit 100 repairs and guarantees energy for each single cell, and at the same time, selects the capacitor corresponding to each single cell to filter the ripple interference through the synchronous filtering network unit 120. Since the filter capacitor values ​​corresponding to each single cell are different, the synchronous filtering network unit 120 will dynamically adjust the input of the required capacitor in real time.

[0078] Repeat the above steps to realize the cyclic repair and energy guarantee operation of dynamic real-time matching filter capacitor according to the impedance change of each single cell in different repair and energy guarantee cycles of the whole battery group, so as to achieve the repair and energy guarantee effect and the ideal low ripple output circuit design effect.

[0079] The beneficial effects of the above technical solution are as follows: the filter capacitor input of the synchronous filter network unit 120 of the device is adjusted in real time and dynamically according to the impedance of each single cell in the unit 140 of the whole battery group and the different frequencies of the high-frequency current signal output by the constant current source amplifier unit 130, ensuring that the ripple signals of different frequencies generated by the high-frequency composite harmonic current signal are matched in real time with different capacitors for filtering, achieving a precise filtering effect that cannot be achieved by conventional fixed capacitors.

[0080] The online whole-group repair and energy protection device for batteries must not only repair and maintain the batteries through high-frequency composite harmonics, but also prevent the ripple generated by high-frequency composite harmonics from interfering with the environment and other circuits and electrical equipment connected to the batteries. Therefore, comprehensive considerations are required in the design. Figure 2A This is a schematic diagram of the working principle of the battery energy online and energy guarantee device system. The entire battery unit is composed of N single cells in series, including battery 1-battery 2-...battery K...battery N. If a single high-frequency composite harmonic is applied to the positive and negative electrodes of the entire battery group to repair and maintain the entire battery group at the same time, this waveform will be applied to the external circuit at the same time to form ripple interference. At this time, adding a filter capacitor will weaken the waveform signal strength and fail to achieve the repair effect. This is a contradiction. To resolve this inherent contradiction, the device repairs and maintains each single cell in the entire battery group through switching time-sharing, and applies a high-frequency composite harmonic current signal to the single cell for repair. Reference Figure 2B The equivalent analysis circuit diagram shows that the high-frequency composite harmonic current signal of the pulse repair circuit is applied to the single cell to form a separate loop. At the same time, the high-frequency composite harmonic signal acts as a signal source to generate a ripple interference source loop for external radiation interference to the external circuit and the environment through the impedance of the other N-1 single cells of the whole battery group. The device obtains a set of selectable and adjustable corresponding filter capacitance values ​​by matching the impedance and the different frequencies in the composite harmonic current signal, and filters the ripple signal of the corresponding frequency through the synchronous filtering network unit 120, thus realizing the unified design ideas and principles for the repair and maintenance of the single cell and the external filtering of the whole battery group.

[0081] The traditional battery static impedance is the corresponding DC static impedance of the battery itself, while the dynamic high-frequency impedance when filtering high-frequency composite harmonics is different from the DC static impedance. The DC static impedance matching filter capacitor cannot achieve the ideal filtering effect. Figure 3The impedance test of this device is a dynamic high-frequency impedance test. The core control processing unit 100 is connected to the constant current source amplifier unit 130 through the PWM output interface; the core control processing unit 100 is connected to the control end of the battery selection switch K1, K2, .... KN of the entire battery unit 140 through the switch signal interface B to control whether the switch is turned on; the current signal output I+, I- of the constant current source high-frequency amplifier unit 130 is connected to one end of the battery selection switch K1, K2, .... KN, and the other end of the battery selection switch K1, K2, .... KN is connected to the positive and negative poles of each single battery. The voltage signal generated by the current signal of the constant current source amplifier unit 130 on the single battery is connected to the input of the battery composite harmonic high-frequency impedance measurement unit 110 through I+, I-, and is connected to the analog quantity acquisition interface of the core control processing unit 100 through the operational amplifier output U. When the core control processing unit 100 applies the PWM signal, it synchronously controls one of the battery selection switches to select the high-frequency composite harmonic current signal to be applied to the corresponding single battery. The synchronous start-up battery composite harmonic high-frequency impedance measurement unit 110 collects analog quantity of the voltage signal of the corresponding single battery, and calculates the composite high-frequency impedance value of the single battery through the known output high-frequency composite harmonic current value and the collected high-frequency voltage signal.

[0082] The entire battery unit 140 is composed of N single cells. Since the high-frequency impedance values ​​of different single cells are different, the sum of the other N-1 impedances corresponding to each battery is also different. Therefore, when repairing each single cell, the capacitance value of the filter network is also different. The core control processing unit 100 calculates the capacitance value required for filtering out ripple interference when each single cell performs composite harmonic current repair and energy guarantee based on the measured high-frequency impedance of each single cell in the entire battery group and the frequency value contained in the high-frequency composite harmonic current signal, and stores it in the memory of the core control processing unit 100. In the subsequent repair cycle of a repair and energy guarantee cycle, this capacitance value is called for synchronous filtering processing.

[0083] The measurement of high-frequency dynamic impedance is to synchronously test the voltage value across each single cell when applying high-frequency composite harmonic current to each single cell, and the core control unit converts the high-frequency impedance; this device does not require additional test circuits, and impedance testing and battery maintenance are carried out simultaneously.

[0084] refer to Figure 4, the I+ end of the high-frequency harmonic voltage signal at both ends of the battery is connected to one end of R111 through C82, and the other end of R111 is connected to the reverse input end of the high-frequency operational amplifier. The I+ end of the high-frequency harmonic voltage signal at both ends of the battery is connected to one end of R112 through C98, and the other end of R112 is connected to the same-direction input end of the high-frequency operational amplifier U12A. At the same time, R112 and C98 are connected to the V_1.25 reference voltage end to raise the reference voltage of the high-frequency harmonic voltage signal. The reverse input end of the high-frequency operational amplifier U12A is connected to the output end of U12 through R113, and the voltage signal is amplified and processed to the voltage range that can be recognized by the analog acquisition interface of the core control processing unit 100. The output end of the high-frequency operational amplifier U12A is connected to GND through VD1, which protects the core control processing unit 100 from overvoltage breakdown. The positive power supply AVCC of the high-frequency operational amplifier U12A is connected to the ground through C99, which plays the role of power supply voltage stabilization and filtering. The high-frequency operational amplifier U12A chip is selected as a high-frequency integrated operational amplifier with a wide high-frequency signal response range, ensuring that the amplified signal truly reflects the high-frequency harmonic voltage signal at both ends of the battery.

[0085] After the device obtains the high-frequency impedance value of each single battery, in the subsequent battery repair and maintenance process, the synchronous filtering network unit 120 is put into synchronous ripple suppression processing, referring to Figure 5The core control processing unit 100 is connected to the constant current source amplifier unit 130 through the PWM output interface; the current signal output I+, I- of the constant current source amplifier unit 130 is connected to one end of the battery selection switch K1, K2, .... KN, and the other end of the battery selection switch K1, K2, .... KN is connected to the positive and negative poles of each single battery. The core control processing unit 100 is connected to the control end of the capacitor selection switch KX1, KX2, .... KXm, KY1, KY2, .... KYm, KZ1, KZ2, .... KZm of the synchronous filtering network unit 120 through the switch signal interface A to control whether the switch is turned on; one end of the filter capacitor CX1, CX2, .... CXm, CY1, CY2, .... CYm, CZ1, CZ2, .... CZm is connected to the positive output BAT+ of the entire battery unit 140, and the other end is connected to the negative output BAT- of the entire battery unit 140 through the capacitor selection switch KX1, KX2, .... KXm, KY1, KY2, .... KYm, KZ1, KZ2, .... KZm. The positive and negative outputs BAT+ and BAT- of the entire battery unit 140 are filtered by the synchronous filtering network unit 120 and then output to the external power-consuming device. When the core control processing unit 100 applies the PWM signal, it synchronously controls one of the battery selection switches K1, K2, .... KN to select and apply the high-frequency composite harmonic current signal to the corresponding single battery. At the same time, the core control processing unit 100, according to the stored capacitance value, when one of the battery selection switches K1, K2, .... KN is turned on, turns on the capacitance selection switch corresponding to the synchronous filtering network unit 120 to filter the ripple interference generated by the battery repair.

[0086] refer to Figure 6 The device outputs a constant-current high-frequency composite harmonic current signal, which is a composite harmonic current composed of a large current of 7kHz below the core frequency, a small current signal of 10kHz above the core frequency, and a current signal of multiple frequencies of 8.5kHz at the core frequency. The low-frequency part of the high-frequency composite harmonic current has a large amplitude, and the high-frequency part has a small amplitude, which ensures that large lead sulfate crystals obtain a large amount of energy and small lead sulfate crystals obtain a small amount of energy, ensuring that crystals of different forms can be broken and re-participate in the chemical reaction. Since the frequencies of the high-frequency composite harmonic current signals are different, the filter capacitors corresponding to different frequencies are also different.

[0087] When repairing and maintaining a single battery K in the entire battery unit group 140, the applied high-frequency composite harmonic current signal includes three frequencies: F1 = 7 kHz; F2 = 8.5 kHz; F3 = 10 kHz.

[0088] The high-frequency composite harmonic current signal combines with the impedance of the battery K itself to form a high-frequency voltage UK.

[0089] The sum of the impedances of the other batteries in the entire battery cell group 140 is:

[0090] Rkn-1=(R1+......+RN)-RK.

[0091] UK and Rkn-1 are an interference source of equivalent external ripple interference for the entire battery group, and the interference source includes ripple signals of three frequencies: F1, F2, and F3.

[0092] According to the formula, capacitor filter frequency F = 1 / (2πRC), the filter capacitor values ​​corresponding to different frequencies during the repair and maintenance of single battery K are obtained:

[0093] C1=1 / (2π*Rkn-1*F1);

[0094] C2=1 / (2π*Rkn-1*F2);

[0095] C3=1 / (2π*Rkn-1*F3);

[0096] Therefore, the core control processing unit 100 simultaneously starts the capacitor selection switches in the corresponding C1, C2, C3 numerical synchronous filtering network unit 120 according to the order of applying the composite harmonic currents of different frequencies F1, F2, F3, and performs filtering on the ripples of the corresponding frequencies.

[0097] Since the impedance of each single cell is different, the sum of the corresponding impedances of other batteries is also different, so the filter capacitance values ​​C1, C2, and C3 corresponding to each single cell are also different. This requires the core control processing unit 100 to adjust the capacitance selection of the synchronous filtering network unit 120 in real time when repairing each single cell to achieve the design effect of dynamic filtering.

[0098] refer to Figure 5 The synchronous filtering network unit is composed of filter capacitors of different capacities, including a series of capacitors at uF, nF, and pF levels; each capacitor is connected to the filtering system through a high-frequency electronic switch, and the response time of the high-frequency electronic switch is at least 3 times the corresponding high-frequency composite harmonic frequency, ensuring that the application of the high-frequency composite harmonic and the application of the filter capacitor are synchronized. The filter network unit adopts a multi-layer high-speed circuit board design to reduce interference when the high-frequency switch is turned on.

[0099] Since the impedance increase or decrease of lead-acid batteries does not occur suddenly but is a long-term cumulative effect, in order to save energy, the measurement of high-frequency dynamic impedance is carried out in a certain period (for example, every 96 hours). During one measurement process, the dynamic impedance measurement of each single battery in the entire battery unit is completed, which serves as the basis for selecting the capacitor input of the filter network unit in this cycle.

[0100] The connection between each single battery and the power amplifier unit, and between each single battery and the battery composite harmonic high-frequency impedance measurement unit are all connected through independent controllable electronic switches. When not being repaired or impedance tested, each single battery is completely disconnected from the power amplifier unit and the battery composite harmonic high-frequency impedance measurement unit, thereby minimizing the interference of the static operation of the repair system on the environment and other equipment connected to the battery.

[0101] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0102] 1. A circuit and method for online whole-group repair and energy guarantee of batteries with dynamic ripple suppression. By measuring the composite harmonic high-frequency impedance of each battery in the whole group of batteries, the dynamic impedance of each single battery during high-frequency composite harmonic repair is obtained, and the corresponding composite harmonic high-frequency impedance is provided for the device to suppress ripple interference, rather than the battery DC resistance under static state, to ensure that the device suppresses ripple interference to below the national standard through resistance-capacitance filtering, thus solving the technical problem of ripple interference caused by online maintenance of lead-acid batteries.

[0103] 2. A circuit and method for online whole-group repair and energy guarantee of batteries with dynamic ripple suppression, which is different from the traditional fixed RC filter matching circuit. Through the synchronous filter network unit, the filter capacitor value can be dynamically matched according to the changes in the high-frequency impedance of the battery composite harmonics and the frequency characteristics of the high-frequency composite harmonics, so as to achieve the optimal ripple suppression effect.

[0104] 3. A circuit and method for online repair and energy guarantee of a whole battery group with dynamic ripple suppression, which realizes the simultaneous online maintenance of lead-acid batteries and composite harmonic high-frequency impedance, simplifies the complex battery impedance test circuit, and realizes the suppression of external ripple interference of high-frequency composite harmonics through time-sharing battery repair and periodic dynamic impedance measurement methods, and through the matching of the whole battery group's own impedance with the dynamically changing filter capacitor, and reduces the ripple interference of the whole battery group to an extremely low level.

[0105] Those skilled in the art will appreciate that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0106] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A battery online whole group repair and energy guarantee device, characterized in that: include: The core control processing unit is used to control the constant current source power amplifier unit in a time-sharing manner to generate a high-frequency composite harmonic current applied to each single battery in the entire battery unit group; A battery composite harmonic high-frequency impedance measurement unit, used to collect the high-frequency voltage value of each single battery corresponding to the high-frequency composite harmonic current and provide it to the core control processing unit; The core control processing unit is further used to calculate the high-frequency impedance of each single battery in the entire group of battery units based on the high-frequency composite harmonic current and the high-frequency voltage value, and calculate the filter capacitance value based on the sum of the high-frequency impedances of the other single batteries in the entire group of battery units except the single battery currently being repaired and the high-frequency frequency to update the filter capacitance value in the memory in real time, wherein the filter capacitance value changes with the high-frequency impedance of each single battery during the repair process of the entire group of battery units; and A synchronous filtering network unit is used for connecting the filter capacitors in the synchronous filtering network unit that match the capacitance value in real time to perform ripple interference filtering based on the control of the core control processing unit. The synchronous filtering network unit is arranged in a multi-layer high-speed circuit board. The synchronous filtering network unit includes a plurality of capacitors and a plurality of high-frequency electronic switches. The plurality of capacitors include m uF-level capacitors, m nF-level capacitors and m pF-level capacitors. Each capacitor is connected to the filtering system through one of the plurality of high-frequency electronic switches. Among them, the multiple high-frequency electronic switches are 3m high-frequency electronic switches, and the 3m high-frequency electronic switches connect the capacitor in the synchronous filtering network unit that matches the capacitance value according to the switch control signal A, so that according to the impedance changes of each single battery in different repair and energy guarantee cycles of the entire group of batteries, dynamic real-time matching filter capacitor cyclic repair and energy guarantee operations are performed.

2. The battery online whole group repair and energy guarantee device according to claim 1 is characterized in that: The core control processing unit is used to calculate an initial capacitance value based on the sum of the default high-frequency impedances of the other single cells in the entire group of battery cells except the single cell currently being repaired and the high-frequency frequency within the first repair cycle of the first repair cycle, and store the initial capacitance value in a memory as a filter capacitance value, wherein the multiple repair cycles include a first repair cycle and subsequent repair cycles, and each repair cycle includes a first repair cycle and subsequent repair cycles.

3. The battery online whole group repair and energy guarantee device according to claim 1 is characterized in that: The core control processing unit is used to calculate the filter capacitance values ​​corresponding to different high-frequency frequencies by the following formula when repairing the single battery K: C1=1 / (2π*Rkn-1*F1); C2=1 / (2π*Rkn-1*F2); C3=1 / (2π*Rkn-1*F3); Among them, Rkn-1 represents the sum of the high-frequency impedances of the other single cells in the entire group of battery cells except the single cell K currently being repaired, Rkn-1 = (R1 +...... + RN) - RK, F1, F2 and F3 are respectively the three high-frequency frequencies contained in the high-frequency composite harmonic current signal, among which F1 = 7kHz; F2 = 8.5kHz; F3 = 10kHz.

4. The battery online whole group repair and energy guarantee device according to claim 1 is characterized in that: The PWM output interface of the core control processing unit is connected to the input end of the constant current source power amplifier unit, and the constant current source power amplifier unit generates a high-frequency composite harmonic current based on the PWM signal, and outputs a positive high-frequency composite harmonic current I+ and a negative high-frequency composite harmonic current I- through the positive output end and the negative output end of the constant current source power amplifier unit respectively.

5. The battery online whole group repair and energy guarantee device according to claim 4 is characterized in that: The whole battery unit group includes N single cells and N pairs of battery selection switches, each pair of battery selection switches is used to connect one of the N single cells according to the switch control signal provided by the core control processing unit, wherein: The positive output terminal and the negative output terminal of the constant current source power amplifier unit are connected to one end of each pair of battery selection switches in the N pairs of battery selection switches; The other end of each pair of battery selection switches is connected to the positive electrode and the negative electrode of a corresponding single battery; and The core control processing unit is connected to the control ends of the N pairs of battery selection switches via N switch control signal interfaces B, respectively, wherein the first switch control signal to the Nth switch control signal are provided to the control ends of the N pairs of battery selection switches in a time-sharing manner via the N switch control signal interfaces B in each repair cycle.

6. The battery online whole group repair and energy guarantee device according to claim 5 is characterized in that: The battery composite harmonic high-frequency impedance measurement unit includes an operational amplifier, a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor, a third capacitor and a voltage regulator, wherein: The inverting input terminal of the operational amplifier is connected to one end of the first capacitor via the first resistor, and the other end of the first capacitor is connected to the positive output terminal of the constant current source power amplifier unit; The positive input terminal of the operational amplifier is connected to the second node via the second resistor, the second node is connected to the reference voltage terminal and to one end of the second capacitor, and the other end of the second capacitor is connected to the negative output terminal of the constant current source power amplifier unit; The output end of the operational amplifier is connected to the inverting input end of the operational amplifier via a third resistor, connected to the analog quantity acquisition interface of the core control processing unit and grounded via a voltage stabilizing diode; The positive power supply terminal of the operational amplifier is grounded via a third capacitor and connected to a forward voltage source, and the negative power supply terminal of the operational amplifier is grounded.

7. The battery online whole group repair and energy guarantee device according to claim 5 is characterized in that: One end of the 3m high-frequency electronic switches is respectively connected to one end of the corresponding 3m capacitors, and the other ends of the 3m capacitors are all connected to the positive output end of the entire battery unit group and connected to the positive terminal of the external electrical equipment; The other ends of the 3m high-frequency electronic switches are all connected to the negative output end of the entire battery unit group and connected to the negative terminal of the external power-consuming device; The control ends of the 3m high-frequency electronic switches are respectively connected to 3m switch control signal interfaces A of the core control processing unit, wherein the core control processing unit generates a switch control signal A based on the capacitance value stored in the memory, and the switch control signal A is provided to the corresponding 3m high-frequency electronic switches via the 3m switch control signal interfaces A.

8. A method for online whole-group battery repair and energy guarantee, characterized in that: include: In each repair cycle, the core control processing unit controls the constant current source power amplifier unit in a time-sharing manner to generate a high-frequency composite harmonic current signal applied to each single battery in the entire battery unit group; The high-frequency voltage value of each single battery corresponding to the high-frequency composite harmonic current signal is collected in each repair cycle by the battery composite harmonic high-frequency impedance measurement unit and the high-frequency voltage value is provided to the core control processing unit, and the high-frequency impedance of each single battery in the entire group of battery cells is calculated by the core control processing unit based on the high-frequency composite harmonic current signal and the high-frequency voltage value, wherein the multiple repair cycles include a first repair cycle and a subsequent repair cycle, and each repair cycle includes a first repair cycle and a subsequent repair cycle; In a subsequent repair cycle of the first repair cycle and in a subsequent repair cycle, the core control processing unit calculates a filter capacitance value based on the sum of high-frequency impedances of other single cells in the entire group of battery cells except the single cell currently being repaired and the high-frequency frequency, and updates the filter capacitance value stored in the memory in real time, wherein, in the first repair cycle of the first repair cycle, an initial capacitance value is calculated based on the sum of default high-frequency impedances of other single cells in the entire group of battery cells except the single cell currently being repaired and the high-frequency frequency, and the initial capacitance value is stored in the memory as the filter capacitance value, and the filter capacitance value changes with the high-frequency impedance of each single cell during the repair process of the entire group of battery cells; and In a subsequent repair cycle of the first repair cycle and in a subsequent repair cycle, the core control processing unit is used to connect in real time the filter capacitors in the synchronous filter network unit that match the filter capacitance value to perform ripple interference filtering, wherein the synchronous filter network unit is arranged in a multi-layer high-speed circuit board, and the synchronous filter network unit includes a plurality of capacitors and a plurality of high-frequency electronic switches, wherein the plurality of capacitors include m uF-level capacitors, m nF-level capacitors, and m pF-level capacitors, wherein each capacitor is connected to the filter system through one of the plurality of high-frequency electronic switches, Among them, the multiple high-frequency electronic switches are 3m high-frequency electronic switches, and the 3m high-frequency electronic switches connect the capacitor in the synchronous filtering network unit that matches the capacitance value according to the switch control signal A, so that according to the impedance changes of each single battery in different repair and energy guarantee cycles of the entire group of batteries, dynamic real-time matching filter capacitor cyclic repair and energy guarantee operations are performed.

9. The method for online whole-group battery repair and energy guarantee according to claim 8, characterized in that: Also includes: A high-frequency composite harmonic current is applied to each single battery in the entire group of battery units in a time-sharing manner through a battery selection switch, wherein the high-frequency composite harmonic current is applied to a single battery to form a separate loop, and at the same time, the high-frequency composite harmonic current signal is used as a signal source, and a ripple interference source loop for external radiation interference is generated to the external circuit and the environment through the high-frequency impedance of the other N-1 single batteries in the entire group of battery units, which can not only repair each single battery in the entire group of battery units, but also use the impedance matching filter capacitors of other single batteries in the entire group of battery units to suppress ripple interference.

Images