CN220914951U - Energy storage power supply and energy storage system - Google Patents
Energy storage power supply and energy storage system Download PDFInfo
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- CN220914951U CN220914951U CN202322054941.0U CN202322054941U CN220914951U CN 220914951 U CN220914951 U CN 220914951U CN 202322054941 U CN202322054941 U CN 202322054941U CN 220914951 U CN220914951 U CN 220914951U
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- 238000004146 energy storage Methods 0.000 title claims abstract description 105
- 238000006243 chemical reaction Methods 0.000 claims abstract description 98
- 238000005070 sampling Methods 0.000 claims description 42
- 239000003990 capacitor Substances 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 2
- 101710178035 Chorismate synthase 2 Proteins 0.000 description 1
- 101710152694 Cysteine synthase 2 Proteins 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
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Abstract
The utility model relates to an energy storage power supply and an energy storage system, and belongs to the technical field of power supplies. A battery device; the first end of the voltage conversion circuit is electrically connected with the battery device, and the second end of the voltage conversion circuit is electrically connected with the connecting end of the energy storage converter; the control circuit is electrically connected with the drive control end of the voltage conversion circuit; the control circuit controls the voltage conversion circuit to perform voltage conversion, so that the battery device is matched with the energy storage converter.
Description
Technical Field
The utility model relates to the technical field of power supplies, in particular to an energy storage power supply and an energy storage system.
Background
With the rapid development of battery technology, the battery can be used for storing energy, and the energy can be discharged to the energy storage converter through the battery for users to use. In the prior art, the battery device is generally formed by connecting a plurality of batteries in series, so that the voltage of the battery device can be adapted to the energy storage converter, but the discharge of the plurality of batteries connected in series is easily limited.
Disclosure of utility model
It is an object of the present utility model to provide an energy storage power supply and energy storage system.
According to a first aspect of the present utility model there is provided an energy storage power supply comprising:
A battery device;
The first end of the voltage conversion circuit is electrically connected with the battery device, and the second end of the voltage conversion circuit is electrically connected with the connecting end of the energy storage converter; and
The control circuit is electrically connected with the driving control end of the voltage conversion circuit; the control circuit controls the voltage conversion circuit to perform voltage conversion, so that the battery device is matched with the energy storage converter.
Optionally, the energy storage power supply further includes:
The first voltage sampling circuit is electrically connected with the battery device and used for collecting first voltage of the battery device, and a first voltage output end of the first voltage sampling circuit is electrically connected with the control circuit;
The second voltage sampling circuit is electrically connected with the connecting end of the energy storage converter, acquires the second voltage of the connecting end, and the second voltage output end of the second voltage sampling circuit is electrically connected with the control circuit;
the control circuit is arranged to control the voltage conversion circuit to perform voltage conversion according to the first voltage and the second voltage, so that the battery device is matched with the energy storage converter.
Optionally, the first voltage sampling circuit is a first voltage dividing circuit, the first voltage dividing circuit is electrically connected between the positive electrode and the negative electrode of the battery device, and a voltage dividing point of the first voltage dividing circuit is the first voltage output end; and
The second voltage sampling circuit is a second voltage dividing circuit, the second voltage dividing circuit is electrically connected between the positive connecting end and the negative connecting end of the connecting end, and the voltage dividing point of the second voltage dividing circuit is the second voltage output end.
Optionally, the voltage conversion circuit is a bidirectional dc-dc conversion circuit, which converts a first voltage of the battery device into a second voltage adapted to the energy storage converter in a discharging mode and converts the second voltage of the energy storage converter into the first voltage adapted to the battery device in a charging mode.
Optionally, the energy storage power supply further comprises a pre-charging circuit, the pre-charging circuit is electrically connected between the battery device and a first end of the voltage conversion circuit, the voltage conversion circuit comprises a first capacitor, and the first capacitor is electrically connected between a positive connection end and a negative connection end of the first end of the voltage conversion circuit; wherein the precharge circuit comprises a first branch circuit and a second branch circuit connected in parallel, the first branch circuit comprising a first switch and a first resistor connected in series, the second branch circuit comprising a second switch;
The control circuit is respectively connected with the control end of the first switch and the control end of the second switch, and the control circuit controls the first branch circuit and the second branch circuit to conduct in a time-sharing mode.
Optionally, the batteries in the battery device are divided into at most three battery modules, each of which includes at most twenty batteries connected in series.
Optionally, the number of the battery modules is two or three, and the number of the batteries in each battery module is any value between eight and sixteen.
Optionally, the battery device further includes a sampling circuit, each battery module is correspondingly and electrically connected with a different sampling circuit, and the control circuit is in communication connection with the sampling circuit to receive the battery temperature and the battery voltage of the battery in the battery module corresponding to the output of the sampling circuit; the control circuit is respectively and electrically connected with the first end and the second end of the voltage conversion circuit, acquires input current and output current of the voltage conversion circuit, and is arranged to control conversion efficiency of the voltage conversion circuit when at least one of the input current, the output current, the battery temperature and the battery voltage exceeds a normal range.
Optionally, the plurality of battery modules of the battery device are connected with the SPI bus interface of the control circuit based on an SPI daisy chain connection structure.
According to a second aspect of the present utility model there is provided an energy storage system comprising an energy storage converter and an energy storage power supply as described in the first aspect, a second end of a voltage conversion circuit in the energy storage power supply being electrically connected to the energy storage converter.
The utility model has the technical effects that the direct current output by the battery device can be converted into the direct current which is adaptive to the energy storage converter by arranging the voltage conversion circuit, so that the number of batteries connected in series in the battery device can be reduced on the premise of reaching the voltage required by the energy storage converter, and the manufacturing cost of the energy storage power supply is reduced.
Other features of the present utility model and its advantages will become apparent from the following detailed description of exemplary embodiments of the utility model, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.
FIG. 1 is a block diagram of an energy storage power supply according to an embodiment of the present disclosure;
FIG. 2 is a circuit diagram of a stored energy power supply according to an embodiment of the present disclosure;
Fig. 3 is a block diagram of an energy storage system according to an embodiment of the present disclosure.
Reference numerals illustrate:
An energy storage system 1000;
An energy storage power supply 100; a battery device 10; a battery module 11; a voltage conversion circuit 20; a control circuit 30; a first voltage sampling circuit 40; a second voltage sampling circuit 50; a precharge circuit 60; a sampling circuit 70;
energy storage converter 200.
Detailed Description
Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses.
Techniques and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Fig. 1 shows a schematic diagram of a structure of an energy storage power supply 100 according to an embodiment.
Referring to fig. 1, an energy storage power supply 100 of an embodiment of the present disclosure may include a battery device 10, a voltage conversion circuit 20, and a control circuit 30.
The first terminal of the voltage conversion circuit 20 is electrically connected to the battery device 10, and the second terminal of the voltage conversion circuit 20 is connected to the connection terminal of the energy storage converter 200. The control circuit 30 is electrically connected to the driving control terminal of the voltage conversion circuit 20, and the control circuit 30 can control the voltage conversion circuit 20 to perform voltage conversion, so that the battery device 10 is adapted to the energy storage converter 200. The voltage conversion circuit 20 may perform dc-dc conversion on the dc power output by the battery device 10, that is, the control circuit 30 may control the voltage conversion circuit 20 to perform boost conversion or buck conversion on the dc power output by the battery device 10 according to the voltage of the battery device 10 and the voltage of the energy storage converter 200, so that the converted dc power is adapted to the energy storage converter 200, and the energy storage converter 200 converts the converted dc power into ac power to be supplied to the power grid or the ac load.
In other words, the battery device 10 may be a smaller number of batteries connected in series, and the voltage converting circuit 20 boosts the dc power output from the batteries, so that the converted dc power may be adapted to the energy storage converter 200. On the premise that the energy storage power supply 100 can output the direct current adapting to the energy storage converter 200, the condition that more batteries are connected in series and the consistency is poor easily can be effectively improved, and the manufacturing cost of the energy storage power supply 100 can be effectively reduced by fewer batteries.
In some examples, the batteries in the battery device 10 are divided into at most three battery modules 11, and each battery module 11 includes at most twenty batteries connected in series, where the batteries are electric cells. In other words, the battery in the battery device 10 is divided into at most three battery modules 11 so that the battery is maintained and managed by different battery modules 11. Further, the number of the battery modules 11 is two or three, and the number of the batteries in each battery module 11 is any one value between eight and sixteen, so that the energy which can be stored by the battery device 10 is within 20kwh to adapt to the electricity consumption requirement of a user.
In some examples, the battery in the battery device 10 may be a large-capacity gradient battery, where the capacity of the large-capacity gradient battery is, for example, 100Ah, 200Ah or 300Ah, and the gradient battery is, for example, a battery that meets the decommissioning standard on an electronic device such as an automobile power battery or a mobile phone, without being limited thereto. That is, the battery device 10 may include two to three groups of battery cells, each group having between eight and sixteen battery cells to discharge the energy storage converter 200. In other words, these large-capacity gradient batteries are applied to the energy storage power supply 100, so that the secondary use of the gradient batteries is effectively realized, and the manufacturing cost of the energy storage power supply 100 is reduced.
In some examples, voltage conversion circuit 20 is a bi-directional dc-dc conversion circuit, that is, voltage conversion circuit 20 may have both discharging and charging modes. The voltage conversion circuit 20 may convert the direct current of the first voltage of the battery device 10 into the direct current adapted to the second voltage of the energy storage converter 200 in the discharging mode. The voltage conversion circuit 20 may convert the second voltage of the energy storage converter 200 into a direct current adapted to the first voltage of the battery device 10 in the charging mode. In other words, the voltage conversion circuit 20 is a bidirectional dc-dc conversion circuit, so that the battery device 10 can discharge to the energy storage converter 200, and the energy storage converter 200 can also charge to the battery device 10, so that the circuit structure for additionally providing the battery device 10 to charge to the energy storage converter 200 can be reduced, and the manufacturing cost of the energy storage power supply 100 can be further reduced.
In some examples, as shown in fig. 2, the voltage conversion circuit 20 may be a BUCK-BOOST circuit, and the voltage conversion circuit 20 may include a first inductor L1, a first power switch Q1, a second power switch Q2, a first capacitor C1, and a second capacitor C2, where a connection point between one end of the first inductor L1 and one end of the first capacitor C1 is a positive connection terminal of the first end of the voltage conversion circuit 20, and a connection point between the other end of the first capacitor C1 and a source of the second power switch Q2 is a negative connection terminal of the first end of the voltage conversion circuit 20. The other end of the first inductor L1 is connected to the drain of the first power switch Q1, and the connection point between the source of the first power switch Q1 and one end of the second capacitor C2 is used as a positive connection end of the second end of the voltage conversion circuit 20, and the connection point between the second capacitor C2 and the source of the second power switch Q2 is used as a negative connection end of the second end of the voltage conversion circuit 20. The gate of the first power switch Q1 and the gate of the second power switch Q2 are electrically connected to a driving control terminal (ePWM terminal) of the control circuit 30, respectively. The control circuit 30 may output a PWM driving signal to control the first power switch Q1 and the second power switch Q2 to be alternately turned on, and control the conversion efficiency of the voltage conversion circuit 20 by adjusting the duty ratio of the PWM wave, thereby adapting the voltage of the battery device 10 to the voltage of the energy storage converter 200 to realize the above-mentioned charge mode and discharge mode of the voltage conversion circuit 20. In some examples, both the first power switch Q1 and the second power switch Q2 may be mos transistors.
In some examples, to enhance the stability of the direct current output to the energy storage converter 200, as shown in fig. 2, the energy storage power supply 100 further includes a pre-charging circuit 60, where the pre-charging circuit 60 is electrically connected between the battery device 10 and the positive connection terminal of the first terminal of the voltage conversion circuit 20, the pre-charging circuit 60 includes a first branch circuit and a second branch circuit connected in parallel, the first branch circuit includes a first switch KM1 and a first resistor R1 connected in series, and the second branch circuit includes a second switch KM2. The control circuit 30 is connected with the control end of the first switch KM1 and the control end of the second switch KM2 respectively, so that the first switch KM1 and the second switch KM2 are controlled by the control circuit 30 to be turned on or turned off. In the case where the battery device 10 discharges to the energy storage converter 200, the control circuit 30 may control the first switch KM1 to be turned on and the second switch KM2 to be turned off, so that the battery device 10 may precharge the first capacitor C1. In the case where the first capacitor C1 is charged to the set threshold, the control circuit 30 may control the first switch KM1 to be turned off and the second switch KM2 to be turned on, so that the battery device 10 may directly discharge to the voltage conversion circuit 20. The set threshold may be 70%, 80%, or 90%, and is not limited herein. In other words, the first capacitor C1 is precharged before the battery device 10 discharges to the voltage conversion circuit 20, so that the stability of the dc power input to the voltage conversion circuit 20 can be effectively improved, and the switching loss of the voltage conversion circuit 20 can be reduced.
In some examples, to enable the dc power output by the voltage conversion circuit 20 to be adapted to the energy storage converter 200, the energy storage power supply 100 further includes a first voltage sampling circuit 40 and a second voltage sampling circuit 50, where the first voltage sampling circuit 40 is electrically connected to the battery device 10, and collects a first voltage of the battery device 10, and a first voltage output terminal of the first voltage sampling circuit 40 is electrically connected to the control circuit 30. The second voltage sampling circuit 50 is electrically connected to the connection end of the energy storage converter 200, and collects the second voltage of the connection end, and the second voltage output end of the second voltage sampling circuit 50 is electrically connected to the control circuit 30. The control circuit 30 is arranged to control the voltage conversion circuit 20 to adapt the voltage of the battery arrangement 10 to the voltage of the energy storage converter 200 based on the acquired first and second voltages. That is, the control circuit 30 may determine the duty ratio of the PWM wave and output the corresponding PWM driving signal to the voltage conversion circuit 20 according to the first voltage collected by the first voltage sampling circuit 40 and the second voltage collected by the second voltage sampling circuit 50 of the battery device 10, so as to enable the voltage conversion circuit 20 to output the direct current adapted to the energy storage converter 200 in the discharging mode, and the voltage conversion circuit 20 to output the direct current adapted to the battery device 10 in the charging mode.
In some examples, as shown in fig. 1, the first voltage sampling circuit 40 is a first voltage dividing circuit, and the first voltage dividing circuit is electrically connected between the positive electrode and the negative electrode of the battery device 10, and a voltage dividing point of the first voltage dividing circuit is a first voltage output terminal. The second voltage sampling circuit 50 is a second voltage dividing circuit, and the second voltage dividing circuit is electrically connected between the positive connection end and the negative connection end of the connection end, and the voltage dividing point of the second voltage dividing circuit is a second voltage output end. The first voltage dividing circuit may be a voltage dividing circuit formed by connecting a plurality of resistors in series, and the second voltage dividing circuit may be a voltage dividing circuit formed by connecting a plurality of resistors in series, and the number of resistors is not limited herein. Taking the example of fig. 2 as an example, the first voltage dividing circuit includes a second resistor R2 and a third resistor R3 connected in series, the other end of the second resistor R2 is connected to the positive electrode of the battery device 10, the other end of the third resistor R3 is connected to the negative electrode of the battery device 10, and the connection point of the second resistor R2 and the second resistor R1 is electrically connected to the analog-to-digital conversion end (ADC end) of the control circuit 30 as a voltage dividing point of the first voltage dividing circuit. The second voltage dividing circuit includes a fourth resistor R4 and a fifth resistor R5 connected in series, the other end of the fourth resistor R4 is connected to the positive electrode of the battery device 10, the other end of the fifth resistor R5 is connected to the negative electrode of the battery device 10, and the connection point of the fourth resistor R4 and the fifth resistor R5 is electrically connected to the analog-to-digital conversion end (ADC end) of the control circuit 30 as a voltage dividing point of the second voltage dividing circuit. The control circuit 30 can determine the first voltage of the battery device 10 by collecting the voltage of the voltage division point of the first voltage division circuit, and can determine the second voltage of the energy storage converter 200 by collecting the voltage of the voltage division point of the second voltage division circuit, so that the situation that the control circuit 30 directly collects the voltage of the battery device 10 or the energy storage converter 200 to generate overvoltage is reduced, and the service life of the control circuit 30 is prolonged.
In some examples, as shown in fig. 2, the control circuit 30 may be a control chip, such as a DSP chip. The energy storage POWER supply 100 further includes an auxiliary POWER supply (AUX POWER), which is electrically connected to the battery device 10, the energy storage converter 200, and the control circuit 30, respectively, and can supply POWER to the control circuit 30 through direct current output from the battery device 10 or the energy storage converter 200. The communication end (RS 485 end) of the control circuit 30 is communicatively connected to the energy storage converter 200, and the energy storage converter 200 may send a charging signal to the communication end of the control circuit 30, so that the control circuit 30 controls the voltage conversion circuit 20 to convert the direct current of the second voltage of the energy storage converter 200 into the direct current of the first voltage of the battery device 10 after receiving the charging signal by the communication end of the control circuit 30.
In some examples, as shown in fig. 2, the energy storage power supply 100 may further include an external chip (MCU chip), and the external terminal (UART terminal) of the control circuit 30 may be electrically connected to the external chip. That is, the control circuit 30 may have HMI/4G/WIFI/BLUETOOTH/CAN/RS485 functions after configuring the external chip, so as to be convenient for a user to use.
In some examples, as shown in fig. 2, the battery device 10 further includes a sampling circuit 70, where the sampling circuit 70 may be a BMU chip, each battery module 11 is correspondingly electrically connected to a different sampling circuit 70, and the control circuit 30 is communicatively connected to the sampling circuit 70 of each battery module 11 to receive the battery temperature and the battery voltage of the battery in the battery module 11 output by the sampling circuit 70. The analog-to-digital conversion terminal (ADC terminal) of the control circuit 30 is electrically connected to the first terminal (CS 1 terminal) and the second terminal (CS 2 terminal) of the voltage conversion circuit 20, respectively, and collects the input current and the output current of the voltage conversion circuit 20. The energy storage power supply 100 may further include a circuit breaker QF and a fuse F1, the circuit breaker QF may be electrically connected between the battery device 10 and the voltage conversion circuit 20, the fuse F1 may also be electrically connected between the battery device 10 and the voltage conversion circuit 20, and the circuit breaker QF and the fuse F1 are controlled by the control circuit 30 such that the control circuit 30 may control the circuit breaker QF or the fuse F1 to be turned on or off. The control circuit 30 may receive the input current, the output current, and the battery temperature and the battery voltage of the battery device 10 of the voltage conversion circuit 20 through an analog-to-digital conversion terminal (ADC terminal), and in the case where the values of these parameters of the voltage conversion circuit 20 or the battery device 10 are out of the normal range, the control circuit 30 may control the conversion efficiency of the voltage conversion circuit 20 by changing the PWM driving signal, or control the circuit breaker QF or the fuse F1 to be opened. The larger the PWM duty ratio outputted from the control circuit 30, the higher the conversion efficiency of the voltage conversion circuit. The specific control manner is prior art and is not specifically described herein. In other words, by providing the sampling circuit 70, the battery temperature and the battery voltage of the battery in the battery device 10 at the time of operation can be detected, so that the conversion efficiency of the voltage conversion circuit 20 is changed in the case where the battery has an excessively high temperature or a voltage overvoltage, thereby improving the service life of the energy storage power supply 100.
In some examples, as shown in fig. 2, the plurality of battery modules 11 of the battery device 10 may be connected with the SPI bus interface of the control circuit 30 based on the SPI daisy-chain connection structure, so that each battery module 11 does not need to be configured with an independent singlechip and an auxiliary power supply, that is, on the premise that the BMU chip does not need to be additionally configured with an independent singlechip and an auxiliary power supply, the control circuit 30 may receive the battery temperature and the battery voltage output by each BMU chip, so that the structure of the sampling circuit 70 is simple and the manufacturing cost is low.
The disclosed embodiment also provides an energy storage system 1000, as shown in fig. 3, where the energy storage system 1000 includes an energy storage converter 200 and an energy storage power supply 100 according to any of the foregoing embodiments, and a second end of the voltage conversion circuit 20 in the energy storage power supply 100 is electrically connected to the energy storage converter 200.
While certain specific embodiments of the utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.
Claims (10)
1. An energy storage power supply, comprising:
A battery device (10);
A voltage conversion circuit (20), wherein a first end of the voltage conversion circuit (20) is electrically connected with the battery device (10), and a second end of the voltage conversion circuit (20) is electrically connected with a connecting end of the energy storage converter (200); and
The control circuit (30), the said control circuit (30) is connected with drive control end of the said voltage conversion circuit (20) electrically; the control circuit (30) controls the voltage conversion circuit (20) to perform voltage conversion, so that the battery device (10) is matched with the energy storage converter (200).
2. The energy storage power supply according to claim 1, characterized in that the energy storage power supply (100) further comprises:
The first voltage sampling circuit (40), the first voltage sampling circuit (40) is electrically connected with the battery device (10), and is used for collecting the first voltage of the battery device (10), and the first voltage output end of the first voltage sampling circuit (40) is electrically connected with the control circuit (30);
The second voltage sampling circuit (50), the second voltage sampling circuit (50) is electrically connected with the connecting end of the energy storage converter (200), the second voltage of the connecting end is collected, and the second voltage output end of the second voltage sampling circuit (50) is electrically connected with the control circuit (30);
Wherein the control circuit (30) is arranged to control the voltage conversion circuit (20) to perform voltage conversion in dependence of the first voltage and the second voltage such that the battery arrangement (10) is adapted to the energy storage converter (200).
3. The energy storage power supply according to claim 2, characterized in that the first voltage sampling circuit (40) is a first voltage dividing circuit, the first voltage dividing circuit is electrically connected between the positive electrode and the negative electrode of the battery device (10), and a voltage dividing point of the first voltage dividing circuit is the first voltage output end; and
The second voltage sampling circuit (50) is a second voltage dividing circuit, the second voltage dividing circuit is electrically connected between the positive connection end and the negative connection end of the connection end, and the voltage dividing point of the second voltage dividing circuit is the second voltage output end.
4. The energy storage power supply according to claim 1, characterized in that the voltage conversion circuit (20) is a bi-directional dc-dc conversion circuit, the voltage conversion circuit (20) converting a first voltage of the battery means (10) into a second voltage adapted to the energy storage converter (200) in a discharging mode and converting a second voltage of the energy storage converter (200) into a first voltage adapted to the battery means (10) in a charging mode.
5. The energy storage power supply according to claim 1, wherein the energy storage power supply (100) further comprises a pre-charge circuit (60), the pre-charge circuit (60) being electrically connected between the battery device (10) and the first end of the voltage conversion circuit (20), the voltage conversion circuit (20) comprising a first capacitor, the first capacitor being electrically connected between the positive and negative connection ends of the first end of the voltage conversion circuit (20); wherein the pre-charge circuit (60) comprises a first branch circuit and a second branch circuit connected in parallel, the first branch circuit comprising a first switch and a first resistor connected in series, the second branch circuit comprising a second switch;
The control circuit (30) is respectively connected with the control end of the first switch and the control end of the second switch, and the control circuit (30) controls the first branch circuit and the second branch circuit to conduct in a time-sharing mode.
6. The energy storage power supply according to any one of claims 1 to 5, characterized in that the batteries in the battery device (10) are divided into at most three battery modules (11), each battery module (11) comprising at most twenty batteries connected in series.
7. The energy storage power supply according to claim 6, characterized in that the number of the battery modules (11) is two or three, and the number of the batteries in each battery module (11) is any one of eight to sixteen.
8. The energy storage power supply of claim 6, wherein the battery device (10) further comprises sampling circuits (70), each of the battery modules being electrically connected to a different sampling circuit (70), the control circuit (30) being communicatively connected to the sampling circuits (70) to receive the battery temperature and battery voltage of the battery in the corresponding battery module (11) output by the sampling circuits (70); the control circuit (30) is electrically connected with the first end and the second end of the voltage conversion circuit (20) respectively, and is used for collecting input current and output current of the voltage conversion circuit (20), and the control circuit (30) is arranged to control the conversion efficiency of the voltage conversion circuit (20) when at least one of the input current, the output current, the battery temperature and the battery voltage exceeds a normal range.
9. The energy storage power supply according to claim 6, characterized in that the plurality of battery modules (11) of the battery device (10) are connected with the SPI bus interface of the control circuit (30) based on an SPI daisy chain connection structure.
10. An energy storage system, characterized in that the energy storage system (1000) comprises an energy storage converter (200) and an energy storage power supply (100) according to any of claims 1 to 9, a second end of a voltage conversion circuit (20) in the energy storage power supply (100) being electrically connected to the energy storage converter (200).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322054941.0U CN220914951U (en) | 2023-07-31 | 2023-07-31 | Energy storage power supply and energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322054941.0U CN220914951U (en) | 2023-07-31 | 2023-07-31 | Energy storage power supply and energy storage system |
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| CN220914951U true CN220914951U (en) | 2024-05-07 |
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| CN202322054941.0U Active CN220914951U (en) | 2023-07-31 | 2023-07-31 | Energy storage power supply and energy storage system |
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