Battery cluster charging equipment

Abstract

The utility model discloses a charging device of a battery cluster, which is provided with a battery voltage acquisition module and a charging control module, two voltage sampling ends of the battery voltage acquisition module are respectively and electrically connected with a first energy storage cabinet and a second energy storage cabinet, and an output end of the battery voltage acquisition module is electrically connected with a master control module. The voltage input end of the charging control module is electrically connected with the first energy storage cabinet, the voltage output end of the charging control module is electrically connected with the second energy storage cabinet, the main control module is electrically connected with the controlled end of the charging control module, the second energy storage cabinet is an undervoltage energy storage cabinet, and the battery voltage of the first energy storage cabinet is higher than the calibrated discharging voltage; therefore, the energy compensation device is equivalent to a normal voltage energy storage cabinet for compensating energy for the power-deficient energy storage cabinet, so that energy compensation for the power-deficient energy storage cabinet can be completed only by connecting the normal energy storage cabinet and the power-deficient energy storage cabinet through the power compensation equipment without additionally connecting a stay wire to an alternating-current power supply and carrying a direct-current voltage-stabilizing source, the operation is simple, and the cost is low. And the use convenience is also improved.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage cabinet charging technology, specifically relating to a battery cluster charging device. Background Technology

[0002] Commercial and industrial energy storage refers to the technology of converting electrical energy into other forms of energy and storing it during commercial and industrial electricity consumption. The application of this technology can not only improve the operating efficiency of the power system, but also provide more flexible services for the electricity market. However, the application of commercial and industrial energy storage is complex and ever-changing, and the power loss of energy storage cabinets is an unavoidable problem. For energy storage cabinets on the market that are experiencing power loss, the only way to replenish the power is by using an additional AC power source and converting it into a DC regulated power source to charge the energy storage cabinet that is experiencing power loss.

[0003] However, the aforementioned charging methods have the following shortcomings: (1) They require additional cables to be run on-site to connect to AC power; (2) They are complex to operate and require high skills from maintenance personnel; (3) They require a DC regulated power supply, which is bulky, heavy, inconvenient to carry, and has poor convenience. Therefore, based on the aforementioned shortcomings, how to provide a battery pack charging device that does not require an additional AC power supply, is easy to carry, and is simple to operate has become an urgent problem to be solved. Utility Model Content

[0004] The purpose of this invention is to provide a battery pack charging device to solve the problems of existing technologies, such as the need for additional wiring to connect to AC power, complex operation, and inconvenience in carrying.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, a battery cluster charging device is provided, comprising:

[0007] The system includes a main control module and a battery voltage acquisition module. The first voltage sampling terminal of the battery voltage acquisition module is electrically connected to the first energy storage cabinet, the second voltage sampling terminal of the battery voltage acquisition module is electrically connected to the second energy storage cabinet, and the output terminal of the battery voltage acquisition module is electrically connected to the data receiving terminal of the main control module. The battery voltage of the first energy storage cabinet is higher than the rated discharge voltage, and the second energy storage cabinet is a depleted energy storage cabinet.

[0008] A charging control module, wherein the voltage input terminal of the charging control module is electrically connected to the voltage output terminal of the first energy storage cabinet, the voltage output terminal of the charging control module is electrically connected to the battery charging terminal of the second energy storage cabinet, and the charging control terminal of the main control module is electrically connected to the controlled terminal of the charging control module, for sending a charging start signal or a charging stop signal to the charging control module.

[0009] Based on the above disclosure, the battery cluster power supply equipment provided by the utility model is provided with a battery voltage acquisition module and a charging control module, wherein two voltage sampling ends of the battery voltage acquisition module are electrically connected with the first energy storage cabinet and the second energy storage cabinet respectively, the output end thereof is electrically connected with the main control module, at the same time, the voltage input end of the charging control module is electrically connected with the first energy storage cabinet, the voltage output end of the charging control module is electrically connected with the second energy storage cabinet, the main control module is electrically connected with the controlled end of the charging control module, and the second energy storage cabinet is a power shortage energy storage cabinet, and the battery voltage of the first energy storage cabinet is higher than the calibration discharge voltage; in this way, the utility model is equivalent to using the normal voltage energy storage cabinet to supply power for the power shortage energy storage cabinet, that is, the main control module controls the charging control module to turn on or turn off the connection loop between the normal energy storage cabinet and the power shortage energy storage cabinet by acquiring the battery voltage of the normal energy storage cabinet and the power shortage energy storage cabinet, thereby realizing the charging of the power shortage energy storage cabinet.

[0010] Through the above design, the utility model only needs to connect the normal energy storage cabinet and the power shortage energy storage cabinet through the power supply equipment to complete the power supply for the power shortage energy storage cabinet, without the need of additional pull line access to the alternating current power supply and carrying the direct current voltage stabilizing source, which not only is simple in operation, but also improves the convenience of use, and therefore, is very suitable for large-scale application and promotion.

[0011] In one possible design, the battery voltage acquisition module comprises: a first voltage acquisition circuit and a second voltage acquisition circuit;

[0012] The sampling end of the first voltage acquisition circuit serves as the first voltage sampling end and is electrically connected with the first energy storage cabinet, the sampling end of the second voltage acquisition circuit serves as the second voltage sampling end and is electrically connected with the second energy storage cabinet, and the output ends of the first voltage acquisition circuit and the second voltage acquisition circuit are both electrically connected with the main control module.

[0013] In one possible design, the circuit structures of the first voltage acquisition circuit and the second voltage acquisition circuit are the same, wherein the first voltage acquisition circuit comprises: a first operational amplifier, a first resistor, a second resistor, a third resistor and a fourth resistor;

[0014] The inverting input end of the first operational amplifier is electrically connected with one end of the second resistor through the first resistor, the non-inverting input end of the first operational amplifier is electrically connected with one end of the fourth resistor through the third resistor, wherein the other end of the second resistor serves as the first voltage sampling end and is electrically connected with the negative electrode of the battery of the first energy storage cabinet, and the other end of the fourth resistor also serves as the first voltage sampling end and is electrically connected with the positive electrode of the battery of the first energy storage cabinet;

[0015] The inverting input end of the first operational amplifier is electrically connected with its output end through a fifth resistor, and the two ends of the fifth resistor are connected in parallel with a first capacitor;

[0016] The non-inverting input terminal and the inverting input terminal of the first operational amplifier are also electrically connected with a reference voltage circuit, wherein the output terminal of the first operational amplifier is electrically connected with one end of a seventh resistor through a sixth resistor, the common connection end of the sixth resistor and the seventh resistor is electrically connected with the ground through a second capacitor, and is also electrically connected with a first direct current power supply and the ground through a Schottky diode;

[0017] The other end of the seventh resistor is electrically connected with the output terminal of the first voltage acquisition circuit.

[0018] In a possible design, the first voltage acquisition circuit further includes an input filter unit, wherein the input filter unit includes a third capacitor, a fourth capacitor and a fifth capacitor, and the third capacitor, the fourth capacitor and the fifth capacitor are connected in series.

[0019] The common connection end of the first resistor and the second resistor is electrically connected with the common connection end of the third capacitor and the fourth capacitor, the common connection end of the third resistor and the fourth resistor is electrically connected with the common connection end of the fourth capacitor and the fifth capacitor, and the third capacitor and the fifth capacitor are respectively connected with the ground.

[0020] In a possible design, the reference voltage circuit includes a sixth capacitor and an eighth resistor.

[0021] For the non-inverting input terminal of the first operational amplifier, the non-inverting input terminal is respectively electrically connected with one end of the sixth capacitor and one end of the eighth resistor, the other end of the sixth capacitor and the other end of the eighth resistor are both electrically connected with a reference voltage power supply, and the non-inverting input terminal of the first operational amplifier is also respectively electrically connected with the ground through a ninth resistor and a seventh capacitor.

[0022] In a possible design, the charging control module includes a charging controller and a plurality of charging switch circuits.

[0023] The voltage input terminal of each charging switch circuit is electrically connected with the voltage output terminal of the first energy storage cabinet, and the voltage output terminal of each charging switch circuit is electrically connected with the battery charging end of the second energy storage cabinet.

[0024] The charging control end of the main control module is electrically connected with the input terminal of the charging controller, for sending the charging-on signal or the charging-off signal to the charging controller, and the output terminal of the charging controller is respectively electrically connected with the switch end of each charging switch circuit.

[0025] In a possible design, any charging switch circuit includes a relay, a tenth resistor and a diode.

[0026] The first contact end of the relay is electrically connected with the voltage output end of the first energy storage cabinet, the second contact end of the relay is electrically connected with the battery charging end of the second energy storage cabinet through the tenth resistor, the first coil end of the relay is electrically connected with the output end of the charging controller as the switch end of the any charging switch circuit, and the second coil end of the relay is electrically connected with the second DC voltage.

[0027] The second coil end of the relay is further grounded through the eighth capacitor, and the first coil end and the second coil end are connected in parallel with the diode.

[0028] In a possible design, the device switching module is further included, wherein the device switching module is electrically connected with the switch port of the master control module.

[0029] In a possible design, the device switching module includes an eleventh resistor, a twelfth resistor, a ninth capacitor and a switch.

[0030] One end of the twelfth resistor is electrically connected with one end of the switch, one end of the eleventh resistor and one end of the ninth capacitor, wherein the other end of the eleventh resistor is electrically connected with the switch port of the master control module, the other end of the twelfth resistor is electrically connected with the first DC power supply, and the other end of the switch and the other end of the ninth capacitor are grounded respectively.

[0031] In a possible design, the display module is further included, wherein the display output end of the master control module is electrically connected with the display module.

[0032] Beneficial effects:

[0033] (1) The power supply equipment of the battery cluster provided by the utility model can complete the power supply for the power shortage energy storage cabinet by connecting the normal energy storage cabinet and the power shortage energy storage cabinet, without the need of additional pull lines to access the AC power supply and the carrying of the DC voltage stabilizing source, which not only is simple in operation, but also improves the convenience of use, and thus is very suitable for large-scale application and promotion.

[0034] (2) After the normal energy storage cabinet and the power shortage energy storage cabinet are connected, the equipment can be automatically operated by operating only one switch key, so that the power shortage energy storage cabinet is charged, and thus the convenience of operation is further improved.

[0035] (3) The display module is further arranged in the utility model, the voltage of the normal energy storage cabinet and the power shortage energy storage cabinet can be displayed in real time, and thus the operation and maintenance personnel can know the charging state of the energy storage cabinet in time. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 The structure schematic view of the power supply equipment of the battery cluster provided by the utility model embodiment.

[0037] Figure 2 The connection diagram of the power supply equipment is provided for the embodiment of the utility model;

[0038] Figure 3 The specific circuit diagram of the battery voltage acquisition module is provided for the embodiment of the utility model;

[0039] Figure 4 The specific connection circuit diagram of the multiple charging switch circuits is provided for the embodiment of the utility model;

[0040] Figure 5 The specific circuit diagram of the charging controller is provided for the embodiment of the utility model;

[0041] Figure 6 The specific circuit diagram of the display module is provided for the embodiment of the utility model;

[0042] Figure 7 The specific circuit diagram of the main control module is provided for the embodiment of the utility model. DETAILED DESCRIPTION

[0043] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the utility model will be briefly introduced in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor. It should be noted that the description of these embodiments is used to help understand the utility model, but does not constitute a limitation on the utility model.

[0044] It should be understood that although the terms first, second, etc. can be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another unit. For example, a first unit can be called a second unit, and similarly a second unit can be called a first unit, without departing from the scope of the example embodiments of the utility model.

[0045] It should be understood that for the term "and / or" that can appear in the present text, it is only a description of the association relationship of the associated object, which means that there can be three kinds of relationships, for example, A and / or B, which means that there are three cases of A alone, B alone and A and B together. For the term "and" that can appear in the present text, it is another description of the relationship of another associated object, which means that there can be two kinds of relationships, for example, A and B, which means that there are two cases of A alone and A and B together. In addition, for the character " / " that can appear in the present text, it generally means that the associated objects before and after are an "or" relationship.

[0046] Embodiment:

[0047] Referring to Figures 1-7 As shown in the figure, the charging principle of the battery cluster power supply device provided by the embodiment is to use the energy storage cabinet with high voltage as a charger to charge the energy storage cabinet with insufficient power, thereby reducing the operation difficulty and improving the convenience of use. The power supply device may, but is not limited to, include a main control module, a battery voltage acquisition module, and a charging control module. In specific application, the battery voltage acquisition module is used to acquire the first energy storage cabinet (i.e. normal energy storage cabinet) and the second energy storage cabinet (i.e. energy storage cabinet with insufficient power) and send them to the main control module, i.e. the first voltage sampling end of the battery voltage acquisition module is electrically connected to the first energy storage cabinet (i.e. the positive and negative electrodes of the battery cluster inside the first energy storage cabinet), the second voltage sampling end of the battery voltage acquisition module is electrically connected to the second energy storage cabinet, and the output end of the battery voltage acquisition module is electrically connected to the data receiving end of the main control module.

[0048] In the embodiment, the battery voltage of the first energy storage cabinet is higher than the rated discharge voltage, and the second energy storage cabinet is an energy storage cabinet with insufficient power. In this way, the embodiment is equivalent to using the energy storage cabinet in a normal state to supply power to the energy storage cabinet with insufficient power. Of course, the rated discharge voltage is a voltage basis for defining a normal energy storage cabinet, which can be specifically set according to actual use, and is not limited herein.

[0049] After completing the voltage acquisition of the first energy storage cabinet and the second energy storage cabinet, the main control module can control the charging control module to work according to the voltage data of the two, so as to charge the energy storage cabinet with insufficient power, i.e. the voltage input end of the charging control module is electrically connected to the voltage output end of the first energy storage cabinet, the voltage output end of the charging control module is electrically connected to the battery charging end of the second energy storage cabinet, and the charging control end of the main control module is electrically connected to the controlled end of the charging control module for sending a charging start signal or a charging stop signal to the charging control module. In this way, the main control module can generate a corresponding charging start or stop signal according to the voltage data of the normal energy storage cabinet and the energy storage cabinet with insufficient power, so as to connect or disconnect the connection between the normal energy storage cabinet and the energy storage cabinet with insufficient power, and then realize the charging of the energy storage cabinet with insufficient power by the normal energy storage cabinet.

[0050] Referring to Figure 2 As shown in the figure, the entire power supply device can be regarded as a charging switch that connects the normal energy storage cabinet and the energy storage cabinet with insufficient power. Therefore, when the connection between the two is connected, the power supply of the energy storage cabinet with insufficient power can be realized, and when the connection between the two is disconnected, the power supply of the energy storage cabinet with insufficient power is stopped. In this way, through the above design, the battery cluster power supply device provided by the embodiment not only has simple operation, but also has strong use flexibility, thereby being very suitable for large-scale application and promotion.

[0051] In one possible design, the second aspect of the embodiment provides specific circuit of each module in the first aspect of the embodiment.

[0052] Firstly, one of the options of the master module and the circuit structure are provided.

[0053] In the embodiment, the master module can be but not limited to STM32 series single-chip microcomputer and its peripheral circuit; alternatively, the embodiment preferably adopts STM32F042F4P6 type single-chip microcomputer, and the circuit diagram can be referred to as shown in Figure 7 ; of course, other control chips can be selected, which are not limited to the foregoing examples.

[0054] Secondly, one of the circuit structures of the battery voltage acquisition module is provided.

[0055] In the specific implementation, the battery voltage acquisition module can be but not limited to include: a first voltage acquisition circuit and a second voltage acquisition circuit, wherein the sampling end of the first voltage acquisition circuit is electrically connected to the first energy storage cabinet as the first voltage sampling end, the sampling end of the second voltage acquisition circuit is electrically connected to the second energy storage cabinet as the second voltage sampling end, and the output ends of the first voltage acquisition circuit and the second voltage acquisition circuit are both electrically connected to the master module; in this way, the two voltage acquisition circuits can be used to sample the voltages of the normal energy storage cabinet (i.e. the first energy storage cabinet) and the energy shortage energy storage cabinet, and transmit to the master module to realize the charging control of the energy shortage energy storage cabinet.

[0056] Alternatively, the circuit structures of the first voltage acquisition circuit and the second voltage acquisition circuit are the same, both of which are differential circuits to realize the voltage acquisition of the respective energy storage cabinet.

[0057] In the embodiment, the first voltage acquisition circuit is taken as an example to describe the specific circuit structure.

[0058] In the specific application, the first voltage acquisition circuit can be but not limited to include: a first operational amplifier U1C, a first resistor R5, a second resistor R4, a third resistor R9 and a fourth resistor R8; wherein the connection structure of each electronic device is as follows:

[0059] Referring to Figure 3As shown, the inverting input end of the first operational amplifier U1C is electrically connected to one end of the second resistor R4 through the first resistor R5, and the non-inverting input end of the first operational amplifier U1C is electrically connected to one end of the fourth resistor R8 through the third resistor R9, wherein the other end of the second resistor R4 is electrically connected to the negative electrode of the battery of the first energy storage cabinet (i.e. the negative electrode of the battery cluster in the first energy storage cabinet) as the first voltage sampling end, and the other end of the fourth resistor R8 is also electrically connected to the positive electrode of the battery of the first energy storage cabinet (for the same reason, it is also electrically connected to the positive electrode of the battery cluster in the first energy storage cabinet) as the first voltage sampling end; at the same time, the inverting input end of the first operational amplifier U1C is electrically connected to its output end through the fifth resistor R2, and the first capacitor C1 is connected in parallel across the two ends of the fifth resistor R2.

[0060] Further, referring to Figure 3 As shown, the non-inverting input end and the inverting input end of the first operational amplifier U1C are also electrically connected to a reference voltage circuit, wherein the output end of the first operational amplifier U1C is electrically connected to one end of the seventh resistor R7 through the sixth resistor R6, the common connection end of the sixth resistor R6 and the seventh resistor R7 is connected to ground through the second capacitor C7, and is also electrically connected to the first direct current power supply and to ground through the Schottky diode D2; and the other end of the seventh resistor R7 is electrically connected to the main control module (i.e. the sixth pin of the STM32F042F4P6 single-chip microcomputer) as the output end of the first voltage sampling circuit.

[0061] In this way, the first operational amplifier U1C can be used to realize differential amplification of the voltage of the battery cluster of the first energy storage cabinet, thereby completing voltage sampling of the first energy storage cabinet.

[0062] At the same time, in order to improve the accuracy of voltage sampling, the embodiment also provides an input filtering unit, wherein the input filtering unit may, but is not limited to, include a third capacitor C2, a fourth capacitor C5 and a fifth capacitor C6, and the third capacitor C2, the fourth capacitor C5 and the fifth capacitor C6 are connected in series.

[0063] Referring to Figure 3 As shown, the common connection end of the first resistor R5 and the second resistor R4 is electrically connected to the common connection end of the third capacitor C2 and the fourth capacitor C5, the common connection end of the third resistor R9 and the fourth resistor R8 is electrically connected to the common connection end of the fourth capacitor C5 and the fifth capacitor C6, and the third capacitor C2 and the fifth capacitor C6 are respectively connected to ground; in this way, the third, fourth and fifth capacitors can be used to realize filtering processing of the voltage sampling signal, so as to improve the accuracy of voltage sampling.

[0064] In addition, the embodiment discloses one of the circuit structures of the aforementioned reference voltage circuit:

[0065] In specific implementation, the reference voltage circuit may include, but is not limited to, the sixth capacitor and the eighth resistor. The connection structure of the reference voltage circuit is illustrated by taking the non-inverting input terminal of the first operational amplifier U1C as an example.

[0066] See Figure 3 As shown, for example, the non-inverting input terminal of the first operational amplifier U1C is electrically connected to the sixth capacitor (i.e. Figure 3 One end of C8) and the eighth resistor (i.e. Figure 3 One end of R10 in the first operational amplifier U1C is connected to a reference voltage power supply (3.3V in this embodiment, for example), the other end of the sixth capacitor and the other end of the eighth resistor are both electrically connected to the reference voltage power supply, and the non-inverting input terminal of the first operational amplifier U1C is grounded through the ninth resistor R11 and the seventh capacitor C9, respectively.

[0067] Similarly, the connection structure of the reference voltage circuit for the inverting input terminal of the first operational amplifier U1C is also the same, as can be found in [reference]. Figure 3 As shown, it will not be elaborated further here.

[0068] Of course, the circuit structure of the second voltage acquisition circuit is the same as that of the first voltage acquisition circuit, except that the energy storage cabinet connected to the sampling end is different. Therefore, the second voltage acquisition circuit will not be described in detail in this embodiment.

[0069] Thus, through the detailed description of the two voltage acquisition circuits, the sampled voltage can be differentially amplified using two operational amplifiers, and the amplified voltage signal can be transmitted to the main control module to charge the depleted energy storage cabinet based on the voltage data of the two energy storage cabinets.

[0070] After describing the circuit of the battery voltage acquisition module, this embodiment discloses the specific circuit structure of the charging control module.

[0071] In specific applications, the charging control module described herein may include, but is not limited to, a charging controller and multiple charging switch circuits; wherein, the voltage input terminal of each charging switch circuit is electrically connected to the voltage output terminal of the first energy storage cabinet, and the voltage output terminal of each charging switch circuit is electrically connected to the battery charging terminal of the second energy storage cabinet.

[0072] Meanwhile, the charging control end of the master control module is electrically connected with the input end of the charging controller, used for sending the charging start signal or the charging stop signal to the charging controller, and the output end of the charging controller is electrically connected with the switch end of each charging switch circuit; in this way, the master control module sends the charging start signal to the charging controller, so that the charging controller turns on one or more charging switch circuits, thereby realizing the charging of the power shortage energy storage cabinet; of course, the charging stop signal can also be sent to the charging controller to stop the charging of the power shortage energy storage cabinet.

[0073] Optionally, the charging controller can be, but is not limited to, a ULN2803 type driving chip, and the circuit diagram can be seen from Figure 5 .

[0074] Further, the following takes any charging switch circuit as an example to describe the circuit structure.

[0075] In the embodiment, the any charging switch circuit can be, but is not limited to, including a relay, a tenth resistor and a diode, wherein the connection structure of the above-mentioned electronic devices is as follows:

[0076] Referring to Figure 4 , the first contact end of the relay (i.e. K1, K2, K3 and K4 in Figure 4 ) is electrically connected with the voltage output end of the first energy storage cabinet, and the second contact end of the relay is electrically connected with the battery charging end of the second energy storage cabinet through the tenth resistor (i.e. R1, R12, R19 and R24 in Figure 5 ), wherein the first coil end of the relay serves as the switch end (i.e. the first pin of K1-K4 in Figure 4 ) of the any charging switch circuit, is electrically connected with the output end (i.e. the first coil end of the relay K1-K4 is connected with the 11th pin, the 12th pin, the 13th pin and the 14th pin of the ULN2803 type driving chip in sequence) of the charging controller, and the second coil end of the relay is electrically connected with the second direct current voltage (such as 24V direct current power supply); meanwhile, the second coil end (i.e. the second pin of K1-K4 in Figure 4 ) of the relay is also grounded through the eighth capacitor (C4, C11, C19 and C20 in Figure 4 ), and the diode (D1, D3, D5 and D6 in Figure 4 ) is connected in parallel between the first coil end and the second coil end.

[0077] In this way, the embodiment combines the above-mentioned charging switch circuit to describe the charging control process of the power shortage energy storage cabinet in detail:

[0078] wherein, for example, the master control module realizes the charging control according to the voltage difference between the normal energy storage cabinet and the power shortage energy storage cabinet, that is:

[0079] The voltage difference of the sampling voltage of the normal energy storage cabinet and the energy shortage energy storage cabinet is denoted as △U, wherein the control logic of the main control module is:

[0080] When 500V<△U≤1000V, the main control module sends a charging start signal to the charging controller, so that the charging controller controls the relay K1 to be attracted, at this time, the charging current I=△U / R1.

[0081] When 300V<△U≤500V, the main control module sends a charging start signal to the charging controller, so that the charging controller controls the relays K1-K2 to be attracted, at this time, the charging current I=△U / (R1 / / R12), wherein / / represents parallel connection of resistors.

[0082] When 150V<△U≤300V, the main control module sends a charging start signal to the charging controller, so that the charging controller controls the relays K1-K3 to be attracted, at this time, the charging current I=△U / (R1 / / R12 / / R19).

[0083] When 30V<△U≤150V, the main control module sends a charging start signal to the charging controller, so that the charging controller controls the relays K1-K4 to be attracted, at this time, the charging current I=△U / (R1 / / R12 / / R19 / / R24).

[0084] When △U≤30V, the main control module sends a charging stop signal to the charging controller, so that the charging controller stops charging the energy shortage energy storage cabinet.

[0085] Therefore, by the foregoing detailed description of the foregoing battery voltage acquisition module and the charging control module, the voltage difference between the normal energy storage cabinet and the energy shortage energy storage cabinet can be used to turn on one or more charging switch circuits, so that the normal energy storage cabinet charges the energy shortage energy storage cabinet, and when the voltage difference is less than a set value, the charging of the energy shortage energy storage cabinet is stopped.

[0086] In one possible design, the third aspect of the embodiment is further optimized on the basis of the second aspect of the embodiment, that is, a more abundant peripheral circuit is provided.

[0087] In specific implementation, the foregoing power compensation device can further include, but is not limited to, a device switch module and a display module, wherein the device switch module is used for opening control of the entire device, and the display module is used for real-time display of the voltage of both charging parties.

[0088] Specifically, one of the circuit structures of the foregoing device switch module is disclosed.

[0089] In the embodiment, the foregoing device switch module may, but is not limited to, include an eleventh resistor R31, a twelfth resistor R30, a ninth capacitor C24 and a switch S1, wherein the connection structure of the foregoing various electronic devices is as follows:

[0090] Referring to Figure 7 As shown in the figure, one end of the twelfth resistor R30 is electrically connected to one end of the switch S1, one end of the eleventh resistor R31 and one end of the ninth capacitor C24, wherein the other end of the eleventh resistor R31 is electrically connected to the switch port of the master control module, the other end of the twelfth resistor R30 is electrically connected to the first direct current power supply, and the other end of the switch S1 and the other end of the ninth capacitor C24 are respectively grounded; in this way, the entire power compensation device can be turned on or turned off through the switch S1, so that when the power compensation device is connected to the normal energy storage cabinet and the power deficit energy storage cabinet, the switch S1 is closed, and the entire device can be operated to automatically complete the power compensation for the power deficit energy storage cabinet.

[0091] In addition, the display output end of the master control module is electrically connected to the display module to realize the real-time display of the voltage of the normal energy storage cabinet and the power deficit energy storage cabinet, so that the operation and maintenance personnel can timely understand the voltage state of the charging parties; further, when the power deficit energy storage cabinet is compensated, a preset time length can be counted after starting charging, and then the voltage at the start of charging and the voltage after the preset time length are compared; if the voltage difference between the two is less than the voltage rising threshold, "F" can be displayed on the display module to indicate that the power compensation fails; otherwise, "S" is displayed to indicate that the power compensation succeeds.

[0092] Optionally, referring to Figure 6 As shown in the figure, the display module may, but is not limited to, include an LED screen and a TM1620 type driving chip, wherein the display output end of the master control module is electrically connected to the TM1620 type driving chip, and the output end of the TM1620 type driving chip is electrically connected to the LED screen; in this way, the real-time display of the voltage and the power compensation state can be realized.

[0093] Therefore, through the foregoing detailed description of the power compensation device for the battery cluster, the utility model discloses a new power compensation device for the battery cluster, which is small in size, simple to operate, does not need additional wiring and can realize the rapid power compensation of the power deficit energy storage cabinet; therefore, the utility model is very suitable for large-scale application and promotion in the energy storage technical field.

[0094] Finally, it should be noted that: the foregoing is only the preferred embodiment of the utility model and is not used to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery cluster charging device, characterized in that, include: The system includes a main control module and a battery voltage acquisition module. The first voltage sampling terminal of the battery voltage acquisition module is electrically connected to the first energy storage cabinet, the second voltage sampling terminal of the battery voltage acquisition module is electrically connected to the second energy storage cabinet, and the output terminal of the battery voltage acquisition module is electrically connected to the data receiving terminal of the main control module. The battery voltage of the first energy storage cabinet is higher than the rated discharge voltage, and the second energy storage cabinet is a depleted energy storage cabinet. A charging control module, wherein the voltage input terminal of the charging control module is electrically connected to the voltage output terminal of the first energy storage cabinet, the voltage output terminal of the charging control module is electrically connected to the battery charging terminal of the second energy storage cabinet, and the charging control terminal of the main control module is electrically connected to the controlled terminal of the charging control module, for sending a charging start signal or a charging stop signal to the charging control module.

2. The power supply device of claim 1, wherein The battery voltage acquisition module includes: a first voltage acquisition circuit and a second voltage acquisition circuit; Wherein, the sampling end of the first voltage acquisition circuit serves as the first voltage sampling end and is electrically connected to the first energy storage cabinet, the sampling end of the second voltage acquisition circuit serves as the second voltage sampling end and is electrically connected to the second energy storage cabinet, and the output ends of both the first voltage acquisition circuit and the second voltage acquisition circuit are electrically connected to the main control module.

3. The power supply device of claim 2, wherein The first voltage acquisition circuit and the second voltage acquisition circuit have the same circuit structure. The first voltage acquisition circuit includes: a first operational amplifier (U1C), a first resistor (R5), a second resistor (R4), a third resistor (R9), and a fourth resistor (R8). The inverting input terminal of the first operational amplifier (U1C) is electrically connected to one end of the second resistor (R4) through the first resistor (R5), and the non-inverting input terminal of the first operational amplifier (U1C) is electrically connected to one end of the fourth resistor (R8) through the third resistor (R9). The other end of the second resistor (R4) serves as the first voltage sampling terminal and is electrically connected to the negative terminal of the battery in the first energy storage cabinet. The other end of the fourth resistor (R8) also serves as the first voltage sampling terminal and is electrically connected to the positive terminal of the battery in the first energy storage cabinet. The inverting input terminal of the first operational amplifier (U1 C) is electrically connected to its output terminal through a fifth resistor (R2), and a first capacitor (C1) is connected in parallel across the fifth resistor (R2). The non-inverting and inverting input terminals of the first operational amplifier (U1C) are also electrically connected to a reference voltage circuit. The output terminal of the first operational amplifier (U1C) is electrically connected to one end of the seventh resistor (R7) through the sixth resistor (R6). The common terminal of the sixth resistor (R6) and the seventh resistor (R7) is grounded through the second capacitor (C7) and is also electrically connected to the first DC power supply and grounded through the Schottky diode (D2). The other end of the seventh resistor (R7) serves as the output terminal of the first voltage acquisition circuit and is electrically connected to the main control module.

4. The power supply device of claim 3, wherein The first voltage acquisition circuit further comprises an input filter unit, wherein the input filter unit comprises a third capacitor (C2), a fourth capacitor (C5) and a fifth capacitor (C6), and the third capacitor (C2), the fourth capacitor (C5) and the fifth capacitor (C6) are connected in series; The common connection end of the first resistor (R5) and the second resistor (R4) is electrically connected to the common connection end of the third capacitor (C2) and the fourth capacitor (C5), the common connection end of the third resistor (R9) and the fourth resistor (R8) is electrically connected to the common connection end of the fourth capacitor (C5) and the fifth capacitor (C6), and the third capacitor (C2) and the fifth capacitor (C6) are grounded respectively.

5. The power supply device of claim 3, wherein the power supply device is connected to the battery cluster through the power supply connector. The reference voltage circuit comprises a sixth capacitor and an eighth resistor; The non-inverting input end of the first operational amplifier (U1C) is electrically connected to one end of the sixth capacitor and one end of the eighth resistor respectively, the other end of the sixth capacitor and the other end of the eighth resistor are both electrically connected to a reference voltage power supply, and the non-inverting input end of the first operational amplifier (U1C) is also grounded through a ninth resistor (R11) and a seventh capacitor (C9) respectively.

6. The power supplementing device of a battery cluster according to claim 1, wherein The charging control module comprises a charging controller and a plurality of charging switch circuits; The voltage input end of each charging switch circuit is electrically connected to the voltage output end of the first energy storage cabinet, and the voltage output end of each charging switch circuit is electrically connected to the battery charging end of the second energy storage cabinet. The charging control end of the main control module is electrically connected to the input end of the charging controller, for sending the charging on signal or the charging off signal to the charging controller, and the output end of the charging controller is electrically connected to the switch end of each charging switch circuit respectively.

7. The power supply device of claim 6, wherein the power supply device is configured to supply power to the battery cluster when the battery cluster is connected to the power supply device. Any charging switch circuit comprises a relay, a tenth resistor and a diode; The first contact end of the relay is electrically connected to the voltage output end of the first energy storage cabinet, and the second contact end of the relay is electrically connected to the battery charging end of the second energy storage cabinet through the tenth resistor, wherein the first coil end of the relay serves as the switch end of the any charging switch circuit and is electrically connected to the output end of the charging controller, and the second coil end of the relay is electrically connected to a second direct current voltage; The second coil end of the relay is also grounded through an eighth capacitor, and the first coil end and the second coil end are connected in parallel with the diode.

8. The power supplementing apparatus of a battery cluster according to claim 1, characterized by Further comprising: A device switch module, wherein the device switch module is electrically connected to the switch port of the main control module.

9. The power supply apparatus of claim 8, wherein The device switch module comprises an eleventh resistor (R31), a twelfth resistor (R30), a ninth capacitor (C24) and a switch (S1). One end of the twelfth resistor (R30) is electrically connected to one end of the switch (S1), one end of the eleventh resistor (R31) and one end of the ninth capacitor (C24) respectively, wherein the other end of the eleventh resistor (R31) is electrically connected to the switch port of the master control module, the other end of the twelfth resistor (R30) is electrically connected to the first direct current power supply, and the other end of the switch (S1) and the other end of the ninth capacitor (C24) are grounded respectively.

10. The power supplementing device of a battery cluster according to claim 1, wherein Further comprising: a display module, wherein the display output end of the master control module is electrically connected to the display module.

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