Signal bypass device and energy storage system

Abstract

The present application relates to a signal bypass device and an energy storage system. The signal bypass device comprises: a battery assembly, used for electrically interacting with at least one first external apparatus; and the at least one first external apparatus, comprising a signal bypass module, wherein the signal bypass module is used for bypassing a local target signal when the battery assembly has received target signals from other external apparatuses. By means of the signal bypass device, only one short-circuit control signal needs to be provided to the battery assembly, thereby avoiding arcing phenomena and improving the safety of the entire system.

Description

Signal bypass device and energy storage system

[0001] Related applications

[0002] The present application claims priority to Chinese Patent Application No. 2024112669782, filed on September 11, 2024, entitled “Energy Storage System,” No. 2024112674920, filed on September 11, 2024, entitled “Signal Bypass Device and Energy Storage System,” and No. 2024112678283, filed on September 11, 2024, entitled “Energy Storage System Supporting Hot Plug Function,” the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of energy storage, and in particular to a signal bypass device and an energy storage system. BACKGROUND

[0004] New energy products are increasingly in demand, especially energy storage products. For high-power and large-battery PACK capacity energy storage products, considering the weight of the product, the main machine (inverter + DC output function) and the battery PACK are generally designed separately, at which time they need to be connected by a connecting line. For products that can be packaged, the connecting line can also be used to connect the battery PACK in a hand-in-hand parallel form to the main machine to provide power to the main machine.

[0005] However, to reduce the size of the main machine, the DC output function is separated and a separate DC converter is used. The DC converter also needs to use a connecting line to take power from the battery assembly. The difference between the connecting line of the DC converter and the connecting line of the main machine connecting the battery assembly is that one end of the connecting line is embedded in the DC converter, and only one end is connected to the battery assembly.

[0006] In this way, when the main machine and the DC converter are both connected to the battery assembly, there will be two short-circuit signals (connection identification signals) in the battery assembly, i.e., the short-circuit signals REG+ and REG- in the main machine and the DC converter will cause the REG+ and REG- of the battery assembly to be short-circuited. In some application scenarios, the simultaneous connection of two short-circuit signals may cause some safety problems. For example, in a hot-plug energy storage system, when there are two short-circuit signals, whether the main machine or the DC converter is unplugged (i.e., one of the connecting lines is unplugged), the REG+ and REG- of the battery assembly will still be short-circuited by the short-circuit signals REG+ and REG- in the main machine or the DC converter that is not unplugged. The VBAT+ and VBAT- of the battery assembly port are still live. When the main machine and the DC converter are working with a load, whether the main machine or the DC converter is unplugged, the corresponding connection port will have a sparking phenomenon due to the current.

[0007] Therefore, the problem of two short-circuit signals when the battery assembly is connected with the host and the DC converter needs to be further improved. SUMMARY

[0008] In a first aspect, the present application provides a signal bypass device, comprising:

[0009] a battery assembly, configured to electrically interact with at least one first external device;

[0010] the at least one first external device comprises a signal bypass module, the signal bypass module is configured to bypass a local target signal when the battery assembly has received a target signal of another external device, and the signal bypass module is further configured to provide the target signal to the battery assembly when the battery assembly has not received the target signal of another external device.

[0011] In a second aspect, the present application further provides an energy storage system comprising the signal bypass device according to any one of the above embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0013] FIG. 1 is a circuit diagram of a product in the prior art;

[0014] FIG. 2 is a circuit diagram of a host and a DC connector together accessing a battery assembly in the prior art;

[0015] FIG. 3 is a structural block diagram of a signal bypass device in an embodiment;

[0016] FIG. 4 is a structural block diagram of a signal bypass device in another embodiment;

[0017] FIG. 5 is a structural block diagram of an energy storage system in an embodiment;

[0018] FIG. 6 is a circuit diagram of an energy storage system in another embodiment.

[0019] Explanation of reference signs: first switch module 600, first switch control unit 610, first switch 620, first switch control module 700, feedback unit 710, second switch module 800, first switch unit 810, second switch 811, third switch 812, second switch unit 820, third switch module 500, second switch control unit 910, fourth switch 920, second switch control module 200, fourth switch module 400, third switch unit 410, fourth switch unit 420, fifth switch 411, sixth switch 412. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0021] As shown in FIG. 1, in the conventional technology, the host (inverter + DC output function) and the battery assembly are generally designed separately, and they need to be connected by a connecting line. For products that can be packaged together, the battery assembly can also be connected to the host in a hand-in-hand parallel form using the connecting line to provide power to the host.

[0022] The two ends of the connecting line are connected to the CN2 port of the host and the CN1 port of the battery assembly PACK1, and the switches SW1 and SW2 are closed. At this time, the first locking pin REG+ and the second locking pin REG- in the battery assembly PACK1 are short-circuited by the short-circuit signal REG+ and the short-circuit signal REG- in the host, that is, the pin 2 of the optocoupler U1 in the battery assembly PACK1 is connected to the ground, and the optocoupler U1 starts to work, and the pin 4 of the optocoupler U1 is pulled to the ground. At this time, the target signal test1 changes from high level to low level. When the controller MCU detects that the target signal test1 is low level, the relay RLY1 is controlled to be closed. At this time, the battery assembly PACK1 delivers the power of the first power supply pin BAT+ and the second power supply pin BAT- to the first power supply pin VBAT+ and the second power supply pin VBAT- of the CN1 port and the CN3 port, so as to deliver the power to the host. It should be noted that when the controller MCU detects that the target signal test1 is high level, the relay RLY1 is controlled to be opened. At this time, the power of the first power supply pin BAT+ and the second power supply pin BAT- of the battery assembly PACK1 will not be delivered to the first power supply pin VBAT+ and the second power supply pin VBAT- of the CN1 port and the CN3 port. The following battery assembly PACK is the same. When parallel connection is needed, the two ends of the connecting line are connected to the CN3 port of the battery assembly PACK1 and the CN4 port of the battery assembly PACK2, and the switches SW3 and SW4 are closed. At this time, the first locking pin REG+ and the second locking pin REG- in the battery assembly PACK2 are short-circuited, that is, the pin 2 of the optocoupler U2 in the battery assembly PACK2 is connected to the ground, and the optocoupler U2 starts to work, and the pin 4 of the optocoupler U2 is pulled to the ground. At this time, the target signal test2 changes from high level to low level. When the controller MCU detects that the target signal test2 is low level, the relay RLY2 is controlled to be closed. At this time, the battery assembly PACK2 delivers the power of the first power supply pin BAT+ and the second power supply pin BAT- to the first power supply pin VBAT+ and the second power supply pin VBAT- of the CN4 port and the CN5 port, and through the first power supply pin VBAT+ and the second power supply pin VBAT- of the CN3 port of the battery assembly PACK1, in a parallel manner, that is, the battery assembly PACK1 and the battery assembly PACK2 are connected in parallel to deliver the power to the host.

[0023] In addition, in order to reduce the volume of the host, the direct current output function is separated, and a direct current converter is separately made. The direct current converter also needs to adopt a connecting line to take power from the battery assembly PACK. The difference between the connecting line of the direct current converter and the connecting line of the host connecting the battery assembly PACK is that one end of the connecting line is embedded in the direct current converter, and only one end is connected to the battery assembly PACK. As shown in FIG. 2, using the original connection mode to connect the direct current converter and the battery assembly PACK, the following problems may exist:

[0024] When the host (inverter) is first connected to the CN6 port of the battery assembly PACK, the battery assembly PACK delivers the power of the first power supply pin BAT+ and the second power supply pin BAT- to the first power supply pin VBAT+ and the second power supply pin VBAT- of the CN8 port of the CN6 port and the CN8 port. At this time, the first power supply pin VBAT+ and the second power supply pin VBAT- of the CN8 port of the battery assembly PACK are electrified. When the DC converter is connected to the CN8 port of the battery assembly PACK, whether the switch SW7 is closed or not, the current will be relatively large because there is a capacitor CE1 in the DC converter, and the capacitor CE1 is in a short-circuit state at the moment of charging. Therefore, when the DC converter is connected to the battery assembly PACK, the connection port will cause a sparking phenomenon.

[0025] When the host and the DC converter are connected to the CN6 port and the CN8 port of the battery assembly PACK respectively, at this time, there are two short-circuit control signals, that is, the short-circuit signals REG+ and REG- in the host and the DC converter make the first locking pin REG+ and the second locking pin REG- of the battery assembly PACK be short-circuited. At this time, whether the host or the DC converter is pulled out (that is, one of the connection lines is pulled out), the first locking pin REG+ and the second locking pin REG- of the battery assembly PACK will still be short-circuited by the short-circuit signals REG+ and REG- in the host or the DC converter which is not pulled out. The first power supply pin VBAT+ and the second power supply pin VBAT- of the CN6 port and the CN8 port of the battery assembly PACK are still electrified. When the host and the DC converter are working with a load, whether the host or the DC converter is pulled out first, the corresponding connection port will cause a sparking phenomenon due to the current.

[0026] It should be noted that all switches need to be connected by a connection line before being closed. Similarly, the switch needs to be opened before the connection line is pulled out.

[0027] In summary, in the above working conditions, the corresponding connection port will cause a sparking phenomenon, which does not guarantee the safety of the product and the user.

[0028] In order to solve the above technical problems, the present application provides a signal bypass device, specifically, in combination with FIG. 3, the signal bypass device comprises a battery assembly PACK and at least one first external device, the battery assembly PACK is used for electrically interacting with the at least one first external device.

[0029] The battery assembly PACK can be a battery pack. In other embodiments, the battery assembly PACK can also be in other forms, which are not specifically limited here.

[0030] Each first external device comprises a signal bypass module for bypassing the local target signal in the case that the battery assembly PACK has received a target signal of another external device. Specifically, the signal bypass module determines whether to bypass the local target signal by detecting the type of the control signal output by the battery assembly PACK control signal output end; for example, the signal bypass module bypasses the local target signal when it detects that the battery assembly PACK control signal output end outputs a first control signal; and the signal bypass module outputs the target signal to the battery assembly PACK when it detects that the battery assembly PACK control signal output end outputs a second control signal.

[0031] The target signal can be a short-circuit control signal of the battery assembly PACK, and the battery assembly PACK controls the battery assembly PACK to start working to electrically interact with each external device connected to the battery assembly PACK after receiving the short-circuit control signal, for example, the battery assembly PACK supplies power to each external device connected to the battery assembly PACK, or each external device supplies power to the battery assembly PACK, and the like, which are not specifically limited herein.

[0032] After one external device is connected to the battery assembly PACK, the connected external device provides the target signal to the battery assembly PACK, and the subsequent first external device cannot provide the target signal to the battery assembly PACK due to the presence of the signal bypass module. It should be noted that the first external device connected to the battery assembly PACK can be a first external device, i.e., an external device comprising a signal bypass module, or a second external device not comprising a signal bypass module.

[0033] In the present application, only one external device can provide the target signal to the battery assembly PACK, and other first external devices cannot provide the target signal to the battery assembly PACK, so that the battery assembly PACK does not work when the first external device providing the target signal to the battery assembly PACK is unplugged, and the power supply pin of the battery assembly PACK is not electrified, so that the phenomenon of sparking does not occur.

[0034] In an optional embodiment, the signal bypass module is further configured to provide the target signal to the battery assembly PACK in the case that the battery assembly PACK has not received the target signal of another external device.

[0035] In the embodiment, the first external device connected to the battery assembly PACK provides the target signal to the battery assembly PACK. Alternatively, the default state of the first external device is set to provide the target signal to the battery assembly PACK. After the first external device is connected to the battery assembly PACK, the signal bypass module detects the second control signal output from the control signal output end of the battery assembly PACK (at this time, the battery assembly PACK does not work because no external device is connected to the battery assembly PACK), and the first external device outputs the target signal to the battery assembly PACK.

[0036] After the first external device is connected to the battery assembly PACK, the battery assembly PACK works, and the subsequent connected first external devices do not provide the target signal to the battery assembly PACK. However, in order to ensure normal work, when the number of the first external devices is greater than or equal to two, the order of unplugging the first external devices connected to the battery assembly PACK needs to be limited, for example, the first external device that does not provide the target signal to the battery assembly PACK needs to be unplugged first. When the number of the first external devices is one, the order of unplugging the external devices is not limited, so that the first external device connected after the first external device can provide the target signal to the battery assembly PACK after the first external device is unplugged. When the first external device connected after the first external device is unplugged, the work of the first external device connected first is not affected. Details can be seen from the analysis below.

[0037] In an optional embodiment, the system further includes a second external device connected to the battery assembly PACK, and the second external device is configured to provide the target signal to the battery assembly PACK when the battery assembly PACK does not receive the target signal from the first external device.

[0038] In the present application, the second external device is a device without a signal bypass module, so when the second external device and the first external device are connected to the battery assembly PACK, the second external device needs to be connected first to provide the target signal to the battery assembly PACK, and then the first external device bypasses the local target signal. When the number of the first external devices is greater than or equal to two, the first external device that does not provide the target signal to the battery assembly PACK needs to be unplugged first. When the number of the first external devices is one, the first external device can be unplugged first, or the second external device can be unplugged first.

[0039] In summary, the connection mode in the present application can include:

[0040] 1、At least one first external device is connected to the battery assembly PACK, at this time the first external device connected to the battery assembly PACK provides the target signal to the battery assembly PACK, including:

[0041] 1.1、Two first external devices are connected to the battery assembly PACK, the sequence of connecting the two first external devices to the battery assembly PACK and the sequence of pulling out are not specifically limited.

[0042] 1.2、Three or more first external devices are connected to the battery assembly PACK, the sequence of connecting the two first external devices to the battery assembly PACK is not specifically limited, but the sequence of pulling out is that the first external device not providing the target signal is pulled out first, and when the remaining external devices are two, the case described in the first 1.1 is converted.

[0043] 1.3、Only one first external device is connected to the battery assembly PACK, and the first external device provides the target signal to the battery assembly PACK.

[0044] 2、One second external device and at least one first external device are connected to the battery assembly PACK, including:

[0045] 2.1、One second external device and one first external device are connected to the battery assembly PACK, the second external device is connected to the battery assembly PACK first, so the second external device provides the target signal to the battery assembly PACK, and the first external device can be pulled out first or the second external device can be pulled out first.

[0046] 2.2、One second external device and at least two first external devices are connected to the battery assembly PACK, at this time the second external device provides the target signal to the battery assembly PACK, the sequence of pulling out is that the first external device not providing the target signal is pulled out first, and when there is one first external device and one second external device, the operation can be referred to the operation described above.

[0047] The first external device and the second external device in the application can be a host or a direct current converter.

[0048] According to the above, the first external device includes a signal bypass module. Optionally, the first external device can also include a signal control module for controlling the connection and disconnection of the power supply pin of the battery assembly PACK and the first external device. The structure of the signal bypass module and the structure of the signal control module are described below.

[0049] In order to distinguish the DC converter and the host computer when both are the first external device, the signal control module of the DC converter comprises a first switch module 600, the first switch module 600 comprises a first switch control unit 610 and a first switch 620. The signal control module of the host computer comprises a third switch module 500, the third switch module 500 comprises a second switch control unit 910 and a fourth switch 920. The signal bypass module in the DC converter comprises a first switch control module 700 and a second switch module 800, the second switch module 800 comprises a first switch unit 810 and a second switch unit 820, the first switch unit 810 comprises a second switch 811 and a third switch 812, and the first switch control module 700 further comprises a first feedback unit. The signal bypass module in the host computer comprises a second switch control module 200 and a fourth switch module 400, the fourth switch module 400 comprises a third switch unit 410 and a fourth switch unit 420, the third switch unit 410 comprises a fifth switch 411 and a sixth switch 412, and the second switch control module 200 further comprises a second feedback unit. In the present application, the first external device is introduced by the names of the modules and units in the DC converter. Similarly, the connection relationship and principle can also be applied to the modules and units in the host computer.

[0050] In one of the optional embodiments, as shown in FIG. 4, the signal bypass module comprises a first switch control module 700 and a second switch module 800, a first input end of the first switch control module 700 is connected with a battery assembly PACK control signal output end, and a second input end of the first switch control module 700 inputs a fixed voltage; a control end of the second switch module 800 is connected with an output end of the first switch control module 700.

[0051] The first switch control module 700 is configured to output a first switch control signal based on the first control signal and the fixed voltage when the battery assembly PACK control signal output end outputs the first control signal; and the second switch module 800 is configured to switch the short-circuit state of the first and second locking pins of the first external device to the open state under the action of the first switch control signal.

[0052] The first switch control module 700 is configured to output a second switch control signal when the battery assembly PACK control signal output end outputs a second control signal; and the second switch module 800 is configured to maintain the short-circuit state of the first and second locking pins of the first external device under the action of the second switch control signal.

[0053] The first control signal output by the control signal output end of the battery assembly PACK, that is, the case where the existing external device accesses the battery assembly PACK and provides the target signal for the battery assembly PACK. The first control signal enters the first switch control module 700, so that the first switch control module 700 outputs the first switch control signal. Under the action of the first switch control signal, the second switch module 800 switches the short-circuit state of the first lock signal and the second lock signal of the first external device to the open state, so as to bypass the target signal of the first external device, and ensure that only one target signal is received in the battery assembly PACK. In addition, it needs to be pointed out that no matter how many first external devices are connected to the battery assembly PACK, since the signal bypass module exists in the first external device, the local target signal of the first external device is bypassed, so that only one target signal is received in the battery assembly PACK.

[0054] In the case where the first external device is connected to the battery assembly PACK, and the control signal output end of the battery assembly PACK outputs the second control signal, that is, no external device accesses the battery assembly PACK, the first switch control module 700 outputs the second switch control signal, and the second switch module 800 is used to maintain the short-circuit state of the first lock pin and the second lock pin of the first external device under the action of the second switch control signal.

[0055] In combination with FIG. 4, in the present embodiment, the output end of the battery assembly PACK (such as the port CN12, the port CN10 in FIG. 5, and the port CN14 and the port CN15 in FIG. 6) includes a control signal output pin, a first lock pin, a second lock pin, a first power supply pin and a second power supply pin. The port (such as the port CN13 in FIG. 5 and the port CN16 and the port CN17 in FIG. 6) of the corresponding first external device can include a target signal input pin, a first lock pin, a second lock pin, a first power supply pin and a second power supply pin. When the first external device is connected to the battery assembly PACK, the corresponding pins are connected. The port (such as the port CN11 in FIG. 5) of the corresponding second external device includes a first lock pin, a second lock pin, a first power supply pin and a second power supply pin, and when the second external device is connected to the battery assembly PACK, the corresponding pins are connected. In order to realize the connection between the external device and the battery assembly PACK, the application can also introduce a connection line unit. One end of the connection line unit can be inserted into or pulled out of the output port of the battery assembly PACK; the other end of the connection line unit can be connected to the first external device or the second external device through the corresponding port of the first external device or the second external device, that is, the connection line unit connects the output port of the battery assembly PACK with the corresponding port of the first external device or the second external device.

[0056] Optionally, in combination with FIG. 5 or FIG. 6, the first switch control module 700 is a comparator unit (such as the comparator unit U5B in FIG. 5, or the comparator unit U6B and the comparator unit U7B in FIG. 6), and the voltage value of the first control signal inputted at the first input end of the comparator unit is less than a fixed voltage. The first input end of the comparator unit is directly or indirectly connected with the target signal input pin of the first external device, for example, the first input end of the comparator unit U5B is connected with the target signal input pin of the port of the first external device through the first resistor (such as the resistor R15 in FIG. 5, or the resistor R42 and the resistor R30 in FIG. 6), and the second input end of the comparator unit is connected with the output end of a voltage dividing circuit to input a fixed voltage. In combination with FIG. 5, the voltage dividing circuit can include a second resistor (such as the resistor R10 in FIG. 5, or the resistor R36 and the resistor R22 in FIG. 6) and a third resistor (such as the resistor R13 in FIG. 5, or the resistor R39 and the resistor R27 in FIG. 6), the first end of the third resistor is grounded, the second end is connected with the second resistor and the second input end of the comparator unit, and the second end of the second resistor is connected with the first auxiliary power supply (such as the auxiliary power supply VCC4 in FIG. 5, or the auxiliary power supply VCC4 and the auxiliary power supply VCC6 in FIG. 6). In other embodiments, the voltage dividing circuit can be in other forms, which are not limited here.

[0057] In the embodiment, the signal inputted at the positive input end "+" of the comparator unit (i.e. the first input end of the comparator in the above) is the voltage value of the third resistor, i.e. the voltage value of the first auxiliary power supply divided by the second resistor and the third resistor to ground, and the signal inputted at the negative input end "-" of the comparator unit (i.e. the second input end of the comparator in the above) is the voltage value of the first control signal. Since the voltage value of the first control signal is lower than the voltage value between the two ends of the third resistor, the first switch control signal is outputted by the comparator unit. In the embodiment, after the battery assembly PACK is connected with an external device (such as the first external device or the second external device), the first control signal is outputted by the battery assembly PACK, so that the first switch control signal is outputted by the comparator unit. Optionally, the first switch control signal is at a low level, and under the action of the first switch control signal, the second switch module 800 switches the short-circuit state of the first lock signal and the second lock signal in the first external device to the open state.

[0058] In one of the optional embodiments, as shown in FIG. 4, the second switch module 800 includes a first switch unit 810 and a second switch unit 820, the control end of the first switch unit 810 is connected with the output end of the first switch control module 700, the control end of the second switch unit 820 is connected with the output end of the first switch unit 810, the first switch unit 810 is used for outputting a third switch control signal under the action of a first switch control signal, and the second switch unit 820 is used for switching from being connected with the first end and the second end to being connected with the second end and the third end under the action of the third switch control signal.

[0059] The first switch unit 810 is used for outputting a third switch control signal under the action of a first switch control signal to control the second switch unit 820 to switch the switch state, and the first end and the second end of the second switch unit 820 are connected when the first external device is not connected with the battery assembly PACK. When the control signal output end of the battery assembly PACK outputs a first control signal, the first switch control module 700 outputs a first switch control signal, the first switch unit 810 outputs a third switch control signal under the action of the first switch control signal, and the second end of the second switch unit 820 switches to being connected with the third end under the action of the third switch control signal, so that the short-circuit state of the first locking signal and the second locking signal of the first external device switches to the disconnected state, and the bypass target signal of the first external device.

[0060] In one of the optional embodiments, the first switch unit 810 includes a second switch 811 and a third switch 812, the control end of the second switch 811 is connected with the output end of the first switch control module 700, the first end of the second switch 811 is connected with the second auxiliary power supply, the control end of the third switch 812 is connected with the second end of the second switch 811, the first end of the third switch 812 is connected with the ground, and the second end of the third switch 812 is connected with the control end of the second switch unit 820.

[0061] Optionally, the second switch 811 and the third switch 812 can be triodes, and in other embodiments, the second switch 811 and the third switch 812 can also be selected from other devices, which are not specifically limited herein. In the embodiment, the second switch 811 can be a first triode (such as the triode Q1 in FIG. 5, or the triode Q5 or the triode Q9 in FIG. 6), the third switch 812 can be a second triode (such as the triode Q2 in FIG. 5, or the triode Q6 or the triode Q10 in FIG. 6), and the first switch control module 700 outputs a first switch control signal at a low level, that is, the b electrode (base) of the first triode is pulled low, the first triode is turned on, the first auxiliary power supply VCC4 enters the b electrode (base) of the second triode through the fourth resistor (such as the resistor R9 in FIG. 5, or the resistor R21 and the resistor R35 in FIG. 6), the first triode, and the fifth resistor (such as the resistor R14 in FIG. 5, or the resistor R28 and the resistor R40 in FIG. 6), the b electrode and the e electrode of the second triode are connected through the eleventh resistor (such as the resistor R16 in FIG. 5, or the resistor R29 and the resistor R41 in FIG. 6), so that the second triode is turned on, and then the second auxiliary power supply (such as the auxiliary power supply VCC3 in FIG. 5, or the auxiliary power supply VCC5 and the auxiliary power supply VCC3 in FIG. 6) forms a current loop through the second switch unit 820, the sixth resistor (such as the resistor R12 in FIG. 5, or the resistor R24 and the resistor R38 in FIG. 6), and the triode Q2, the second switch unit 820 starts to work, the second end of the second switch unit 820 is switched from being connected to the first end to being connected to the third end, so as to switch the short-circuit state of the first locking pin and the second locking pin in the first external device to a disconnected state, so as to bypass the local target signal by the first external device. Thus, in the case that the existing external device provides the target signal for the battery assembly PACK, the first external device newly connected to the battery assembly PACK bypasses the local target signal.

[0062] In one of the optional embodiments, the second switch unit 820 is a relay (such as the relay RLY5 in FIG. 5, and the relay RLY6 and the relay RLY8 in FIG. 6), the control end of the relay is connected to the second end of the first switch unit 810, the first end of the relay is connected to the first locking pin of the battery assembly PACK, the second end of the relay is connected to the second locking pin of the battery assembly PACK, and the third end of the relay is suspended. When the relay is not working, the second end of the relay is connected to the first end of the relay. The relay is used to start working when the first control signal is output at the control signal output end of the battery assembly PACK, so that the second end of the relay is switched from being connected to the first end of the relay to being connected to the third end of the relay.

[0063] In combination with FIG. 5 or FIG. 6, one control end of the relay is connected with the second end of the first switch unit 810, and the other control end is connected with the second auxiliary power supply.

[0064] In the embodiment, the second switch unit 820 is a relay. Under the action of the third switch control signal output by the first switch unit 810, the relay is switched from the state of being connected between the fourth pin (second end) and the third pin (first end) to the state of being connected between the fourth pin (second end) and the fifth pin (third end), so that the first locking pin and the second locking pin of the port of the first external device are switched from the short-circuit state to the open state.

[0065] It should be noted that the first end of the second switch unit 820 can be directly connected with the first locking pin of the battery assembly PACK (as shown in FIG. 5) or connected with the first locking pin of the battery assembly PACK through a switch (as shown in FIG. 6), which is not specifically limited herein. Moreover, the switch between the first end of the second switch unit 820 and the first locking pin of the battery assembly PACK and the control switch in the signal control module can be the same or two separate switches, which is not specifically limited herein. Alternatively, the switch between the first end of the second switch unit 820 and the first locking pin of the battery assembly PACK and the control switch in the signal control module can be located in the above-mentioned connection line unit.

[0066] In one optional embodiment, the first switch control module 700 further comprises: a feedback unit 710, a first end of the feedback unit 710 being connected with the first auxiliary power supply through a voltage dividing resistor, and a second end of the feedback unit 710 being connected with a first input end of a comparator unit; the feedback unit 710 is configured to obtain a feedback signal by processing the first auxiliary power supply at the moment when the first input end of the comparator unit is switched from the second control signal to the first control signal, and input the feedback signal to a first input end of the first switch control module 700, and the voltage of the feedback signal is greater than a fixed voltage; the first switch control module 700 is configured to output the second switch control signal when the feedback signal is input to the first input end and the fixed voltage is input to a second input end; and the second switch module 800 is configured to output the target signal to the battery assembly PACK under the action of the second switch control signal.

[0067] Optionally, the feedback unit 710 can be a first diode (such as diode D1 in FIG. 5 or diodes D2 and D3 in FIG. 6), a first end of the first diode being connected with the second auxiliary power supply through a voltage dividing resistor and being connected with an output end of the comparator unit, and a second end of the first diode being connected with the first input end of the comparator unit.

[0068] In the embodiment, if the first external device providing the target signal for the battery assembly PACK is unplugged, the connection between the battery assembly PACK and the first external device corresponding power supply pin is disconnected, and then the operation is directly performed, which does not affect the normal work of the battery assembly PACK. If the first external device providing the target signal for the battery assembly PACK is unplugged (based on the above, at this time, the other external device connected with the battery assembly PACK is also the first external device, and the number can only be one), the signal bypass module of the remaining unplugged first external device provides the target signal for the battery assembly PACK. If the second external device providing the target signal for the battery assembly PACK is unplugged (based on the above, at this time, the other external device connected with the battery assembly PACK is also the first external device, and the number can only be one), the signal bypass module of the unplugged first external device provides the target signal for the battery assembly PACK.

[0069] Therefore, if the unplugged external device providing the target signal for the battery assembly PACK is the third external device, the first lock pin REG+ and the second lock pin REG- of the battery assembly PACK are no longer short-circuited by the target signal of the third external device, and the battery assembly PACK no longer works. At this time, the first power supply pin VBAT+ and the second power supply pin VBAT- of the output port of the battery assembly PACK and the output port of the first external device have no power, so that the output port of the battery assembly PACK does not have a sparking phenomenon when the third external device is unplugged.

[0070] The battery assembly PACK can include an optical coupler (such as the optical coupler U4 in FIG. 5 or the optical coupler U7 in FIG. 6). When the first lock pin REG+ and the second lock pin REG- of the battery assembly PACK are no longer short-circuited by the target signal of the third external device, the 2-pin of the optical coupler in the battery assembly PACK is suspended, and the optical coupler does not work. Thus, the target signal pin output of the battery assembly PACK changes from the first control signal to the second control signal, for example, from low level to high level. When the controller MCU detects the second control signal, the relay (such as the relay RLY4 in FIG. 5 or the relay RLY7 in FIG. 6) of the battery assembly PACK is disconnected, and the first power supply pin VBAT+ and the second power supply pin VBAT- of the output port of the battery assembly PACK have no power, so that the output port of the battery assembly PACK does not have a sparking phenomenon when the third external device is unplugged.

[0071] When the third external device is unplugged, the second control signal enters the positive input terminal "+" of the comparator unit, and because the voltage value of the second control signal is higher than the voltage value of the negative input terminal "-", the comparator unit outputs a high level, i.e., the second switch 811 is cut off, and the third switch 812 is also cut off, so that the second switch unit 820 is switched from the first end and the second end being connected to the second end and the third end being connected, so that the first external device provides the target signal to the battery assembly PACK. In the above example, the second switch 811 is the first triode, the third switch 812 is the second triode, and the second switch unit 820 is the relay, so that the comparator unit outputs a high level, the b pole (base) of the first triode is at a high level, the first triode is cut off, the second triode is also cut off, the relay RLY5 has no current loop, and the relay RLY5 does not work. The connection is switched from the 4th pin and the 5th pin to the 4th pin and the 3rd pin, so that the first external device provides the target signal to the battery assembly PACK, and then the first lock pin REG+ and the second lock pin REG- in the battery assembly PACK are short-circuited by the target signal of the first external device, the battery assembly PACK works, and the second control signal becomes the first control signal again, i.e., from a high level to a low level. When the controller MCU detects the first control signal, the relay RLY4 is controlled to close. At this time, the battery assembly PACK delivers power to the first power supply pin VBAT+ and the second power supply pin VBAT- of the output port, and continues to provide power to the first external device to ensure that the first external device does not power off. At the same time, because the positive input terminal "+" of the comparator unit is changed from the second control signal to the first control signal, i.e., from a high level to a low level, when it becomes the first control signal, the first auxiliary power supply is divided by the seventh resistor (such as resistor R11 in FIG. 5 or resistors R23 and R37 in FIG. 6), the first diode, and the first resistor to ground, so that the voltage value of the positive input terminal "+" of the comparator unit, i.e., the voltage value of the first resistor to ground, continues to be greater than the voltage value of the negative input terminal "-", so that the comparator unit continues to output a high level to make the second switch 811 and the third switch 812 cut off, and then the second switch unit 820 provides the target signal to the battery assembly PACK. In the above example, the comparator unit continues to output a high level to make the first triode and the second triode cut off, and then the relay maintains the connection of the 4th pin and the 3rd pin to maintain the target signal of the first external device to provide the target signal to the battery assembly PACK.

[0072] Thus, the first external device is connected to the battery assembly PACK after the second external device is connected to the battery assembly PACK, or the second external device is pulled out when the first external device and the second external device are connected to the battery assembly PACK, and the sparking phenomenon does not occur, which not only improves the safety of the entire system, but also does not affect the connection mode and work of the original external device, the battery assembly PACK and the package, so that the safety and reliability of the product and the safety of the user are better guaranteed.

[0073] In one of the optional embodiments, please continue to combine FIG. 4, the first external device further includes a signal control module, and the signal control module includes a control switch and a first switch module 600. In combination with the foregoing, the control switch in the present application can be located in the connection line unit.

[0074] In one of the optional embodiments, the first end of the control switch inputs the first auxiliary power supply; the control end of the first switch module 600 is connected with the second end of the control switch. When the first external device is connected to the battery assembly PACK, the first end of the first switch module 600 is connected with the first power supply pin VBAT+ of the battery assembly PACK, the second end of the first switch module 600 is connected with the first input end of the first external device, and the second input end of the first external device is connected with the second power supply pin VBAT- of the battery assembly PACK. It should be noted that the first auxiliary power supply VCC4 can be provided by an auxiliary power supply module in the first external device, the input end of the auxiliary power supply module is connected with the first power supply pin VBAT+ and the second power supply pin VBAT- of the battery assembly PACK, and the output end is used to provide an auxiliary power supply with different voltages.

[0075] The connection line unit further includes two control pins, one of which is connected with the first auxiliary power supply VCC4, and the two control pins are connected through the control switch, so that the first end of the control switch inputs the first auxiliary power supply VCC4, and the second end of the control switch is connected with the control end of the first switch module 600, so that the switching state of the first switch module 600 can be controlled through the control switch.

[0076] Since all the switches need to be connected to the connection line unit before being closed, similarly, the switches need to be opened before the connection line unit is pulled out. Therefore, when the first external device is connected to the battery assembly PACK, the control switch is in an open state, so that the first switch module 600 is in an open state, and there is no electrical interaction between the battery assembly PACK and the first external device, so that the first external device does not occur when the battery assembly PACK is connected through the connection circuit. The output port of the sparking phenomenon occurs when the connection line unit is connected.

[0077] For the convenience of understanding, the actual operation example is described. In the battery assembly PACK, the electric quantity of the pin BAT+ and the pin BAT- is delivered to the first supply pin VBAT+ and the second supply pin VBAT- of the output port. At this time, the first external device is connected to the battery assembly PACK. Since the control switch in the first external device is in the open state, the first switch module 600 is in the open state. Even if the first supply pin VBAT+ and the second supply pin VBAT- of the output port of the battery assembly PACK are electrified, there is no signal transmission between the battery assembly PACK and the first external device, so that when the first external device is connected to the output port of the battery assembly PACK, the phenomenon of sparking does not occur.

[0078] In one of the optional embodiments, when the control switch is in the closed state, the first switch module 600 is in the conductive state, and the battery assembly PACK charges the first external device. After the first external device is connected to the battery assembly PACK and the control switch is closed, the control switch is in the conductive state, so that the switch control signal can be provided to the first switch module 600, the first switch module 600 is in the conductive state, and then the first supply pin VBAT+ and the second supply pin VBAT- of the output port of the battery assembly PACK can charge the first external device, and the circuit starts to work normally.

[0079] In one of the optional embodiments, the first switch module 600 includes a first switch control unit 610 and a first switch 620. The control end of the first switch control unit 610 is connected to the second end of the control switch. The control end of the first switch 620 is connected to the output end of the first switch control unit 610. The first end of the first switch 620 is connected to the first supply pin VBAT+ of the battery assembly PACK, and the second end is connected to the first input end of the first external device. The second input end of the first external device is connected to the second supply pin VBAT- of the battery assembly PACK.

[0080] Generally, the first supply pin VBAT+ is a positive supply pin, and the second supply pin VBAT- is a negative supply pin. In this way, the first switch 620 is arranged between the positive supply pin and the first input end of the first external device, so that the sparking phenomenon can be avoided.

[0081] Optionally, the first switch control unit 610 can be a third triode (such as the triode Q4 in FIG. 5, or the triode Q8 and the triode Q12 in FIG. 6), and in other embodiments, the first switch control unit 610 can also be other devices. The b pole (base) of the third triode is directly or indirectly connected to the second end of the control switch, for example, the b pole of the third triode is connected to the second end of the control switch through the eighth resistance (such as the resistance R18 in FIG. 5, or the resistance R32 and the resistance R44 in FIG. 6), the e pole (emitter) of the third triode is grounded, the b pole of the third triode is connected to the e pole of the third triode through the ninth resistance (such as the resistance R20 in FIG. 5, or the resistance R34 and the resistance R46 in FIG. 6), and the c pole (collector) of the third triode is directly or indirectly connected to the control end of the first switch 620, for example, the c pole (collector) of the third triode is connected to the control end of the first switch 620 through the tenth resistance (such as the resistance R19 in FIG. 5, or the resistance R33 and the resistance R45 in FIG. 6).

[0082] Optionally, the first switch 620 can be a MOS tube (metal oxide semiconductor) (such as the MOS tube Q3 in FIG. 5, or the MOS tube Q7 and the MOS tube Q11 in FIG. 6), and in other embodiments, the first switch 620 can also be other devices. The control end of the MOS tube is connected to the output end of the first switch control unit 610, and the control end of the MOS tube is the g pole (gate), and when the first switch control unit 610 is a third triode, the output end of the first switch control unit 610 is the c pole (collector) of the third triode. The first end of the MOS tube is the s pole (source), and the second end is the d pole (drain). The source of the MOS tube is connected to the first power supply pin VBAT+ of the battery assembly PACK, for example, the first power supply pin of the first external device is connected to the first power supply pin VBAT+ of the battery assembly PACK, and the drain of the MOS tube is connected to the first input end of the first external device.

[0083] In this way, when the control switch is in the off state, the base of the third triode is low, the third triode is cut off, the first switch control unit 610 outputs an off signal to the first switch 620, the gate and the source of the first switch 620 are at the same potential, the first switch 620 is in the off state, so that the positive electrode of the capacitor in the first external device is disconnected from the first power supply pin VBAT+ of the battery assembly PACK, and when the first external device is connected to the output port CN12 of the battery assembly PACK, the phenomenon of sparking does not occur.

[0084] When the control switch is closed, the first auxiliary power supply passes through the control switch and the eighth resistor to the base of the third triode, the third triode is turned on, the voltage input by the first power supply pin VBAT+ of the first external device is divided by the twelfth resistor (such as resistor R17 in FIG. 5, or resistor R31 and resistor R43 in FIG. 6) and the tenth resistor, at this time, the gate potential of the MOS tube Q3 is lower than the source potential, that is, the Vgs voltage of the MOS tube Q3 is the voltage across the eighth resistor, the MOS tube is turned on, and the electric quantity of the first power supply pin VBAT+ and the second power supply pin VBAT- of the battery assembly PACK starts to charge the capacitor in the first external device, and the circuit starts to work normally with load.

[0085] When the first external device needs to be unplugged, the control switch is only opened and the connection line unit is unplugged. After being unplugged, the first switch module 600 is in an open state. According to the above embodiment, the b pole (base) of the third triode changes from high level to low level, the third triode is cut off, the g pole (gate) and s pole (source) of the MOS tube are at the same potential, and the MOS tube is cut off. At this time, the first power supply pin and the second power supply pin of the port of the first external device cannot input electric quantity, so that when the first external device is unplugged, the output port of the battery assembly PACK will not cause a sparking phenomenon, and the battery assembly PACK can continue to supply electric quantity to other external devices.

[0086] For the convenience of understanding, in one of the optional embodiments, a storage energy system is given in combination with FIG. 5. The storage energy system includes a battery assembly PACK, a first external device and a second external device. The first external device is a direct current converter, and the second external device is a host. The direct current converter of the storage energy system is used to be in a conductive state at the second control switch when connected to the battery assembly PACK to interact with the battery assembly PACK, bypass the target signal of the direct current converter when the host provides the target signal to the battery assembly PACK, and provide the target signal to the battery assembly PACK when the host does not provide the target signal to the battery assembly PACK.

[0087] The specific structure of the direct current converter can be combined with the specific definition of the first external device in FIG. 4 and FIG. 5, which will not be repeated here. The specific structure of the host can be combined with FIG. 5. The host is the second external device, the host is connected with the battery assembly PACK, and the host is connected with the battery assembly PACK through the connection line unit. The first control switch is arranged on the connection line between the first locking pin of the output port of the battery assembly PACK and the first locking pin of the port of the host, such as the switch SW8 or SW9 in FIG. 5.

[0088] The internal control signal in the battery assembly PACK is output to the output port of the battery assembly PACK, such as the signal test1 output to the port CN10 and the port CN12 in FIG. 5, which is used as a detection signal for the DC converter to realize the switching of the relay RLY5, and the initial state of the relay RLY5 is that the 4th pin is connected to the 3rd pin.

[0089] The working principle of the energy storage system shown in FIG. 5 includes: in the case that the host computer is connected to the output port CN10 of the battery assembly PACK first, when the first control switch SW8 or SW9 is not closed, there is no electrical interaction between the host computer and the battery assembly PACK, and after the first control switch is closed, the host computer provides a target signal to the battery assembly PACK, and the battery assembly PACK starts to work. Specifically, taking FIG. 5 as an example, the control signal output end of the battery assembly PACK outputs a first control signal, which is the low-level signal test1, and the MCU detects the low-level signal to control the relay RLY4 to be closed, and the battery assembly PACK delivers the power of the power supply pins BAT+ and BAT- to the first power supply pin VBAT+ and the second power supply pin VBAT- of the output port CN10 and the output port CN12. When the DC converter is connected to the output port CN12 of the battery assembly PACK again, at this time, the second control switch SW10 is still in the open state, so the first switch control unit 610 of the first switch module 600, i.e. the b electrode of the transistor Q4 in FIG. 5, is low, and the transistor Q4 is cut off; the first switch 620 of the first switch module 600, i.e. the g electrode and s electrode of the MOS tube Q3 in FIG. 5, are at the same potential, and the MOS tube Q3 is cut off, so that the positive electrode of the capacitor CE2 in the DC converter is disconnected from the first power supply pin VBAT+ of the port CN13 of the DC converter, and thus when the DC converter is connected, the output port CN12 will not have the phenomenon of sparking. When the second control switch SW10 is closed, the first auxiliary power supply VCC4 enters the b electrode of the transistor Q4 through the second control switch SW10 and the resistor R19, the transistor Q4 is turned on, the voltage of the first power supply pin VBAT+ is divided by the resistor R17 and the resistor R19 to the ground, at this time, the g electrode potential of the MOS tube Q3 is lower than the s electrode potential, i.e. the Vgs voltage of the MOS tube Q3 is the voltage across the resistor R17, and the MOS tube Q3 is turned on, the first power supply pin VBAT+ starts to charge the capacitor CE2, and the circuit starts to work normally with load.

[0090] At the same time, the first control signal (i.e. the test1 signal at low level) enters the first switch control module 700, i.e. the positive input end "+" of the comparator unit U5B, and the signal at the negative input end "-" of the comparator unit U5B is the voltage value between the resistors R13, i.e. the voltage value after the first auxiliary power supply VCC4 is divided by the resistor R10 and the resistor R13. Since the voltage value of the first control signal test1 signal is lower than the voltage value between the resistors R13, the comparator unit U5B outputs the first switch control signal, which is at low level, i.e. the second switch 811 of the first switch unit 810, i.e. the b electrode of the transistor Q1, is pulled low, the transistor Q1 is turned on, the first auxiliary power supply VCC4 enters the third switch 812 of the first switch unit 810, i.e. the b electrode of the transistor Q2, through the resistor R9, the transistor Q1 and the resistor R14, so that the transistor Q2 is turned on, i.e. the first switch unit 810 outputs the third switch control signal, and then the second auxiliary power supply VCC3 forms a current loop through the second switch unit 820, i.e. the relay RLY5 coil, the resistor R12 and the transistor Q2, so that the relay RLY5 starts to work. The relay RLY5 is switched from the connection between the 4th pin and the 3rd pin to the connection between the 4th pin and the 5th pin, so that the first lock pin REG+ and the second lock pin REG- in the direct current converter are switched from short circuit to open state, so that when the host and the direct current converter are connected to the battery assembly PACK, the first lock pin REG+ and the second lock pin REG- of the battery assembly PACK are only short-circuited by the first lock pin REG+ and the second lock pin REG- of the host, i.e. the host outputs the target signal to the battery assembly PACK, so that there are no two target signals in the battery assembly PACK at the same time.

[0091] When the host and the direct current converter have been connected to the battery assembly PACK and are working with load, if the direct current converter needs to be pulled out, only the second control switch SW10 needs to be opened and the connection line unit needs to be pulled out. After being pulled out, the b electrode of the first switch control unit 610, i.e. the transistor Q4, changes from high level to low level, and the transistor Q4 is cut off; the g electrode and the s electrode of the first switch 620, i.e. the MOS tube Q3, are at the same potential, and the MOS tube Q3 is cut off. At this time, the first power supply pin VBAT+ and the second power supply pin VBAT- of the port CN13 of the direct current converter cannot deliver power, so that when the direct current converter is pulled out, the port CN13 will not cause a sparking phenomenon. At the same time, it does not affect the battery assembly PACK to continue delivering power to the host to work.

[0092] When the host and the DC converter are both connected to the battery assembly PACK and work with load, if the host needs to be pulled out, only the first control switch SW8 or the first control switch SW9 is opened, and the connection line unit is pulled out. After being pulled out, the first locking pin REG+ and the second locking pin REG- of the battery assembly PACK are no longer short-circuited by the target signal of the host, the battery assembly PACK does not work, specifically, the 2-pin of the optocoupler U4 in the battery assembly PACK is suspended, the optocoupler U4 does not work, the first control signal becomes the second control signal, that is, from low level to high level, when the MCU detects the second control signal, the relay RLY4 is controlled to be disconnected, at this time, the first power supply pin VBAT+ and the first power supply pin VBAT- of the output port CN10 and the output port CN12 of the battery assembly PACK have no power, so that when the connection line unit is pulled out, the output port CN10 and the output port CN12 will not have a sparking phenomenon. At the same time, the second control signal enters the positive input end "+" of the comparator unit U5B, because the voltage value of the second control signal is higher than that of the negative input end "-", the comparator unit U5B outputs the second switch control signal, which is high level; the second switch 811, that is, the b-pin of the transistor Q1, is high level, the transistor Q1 is cut off, the third switch 812, that is, the transistor Q2, is also cut off, the second switch unit 820, that is, the relay RLY5 coil, has no current loop, the relay RLY5 does not work, the connection between the 4-pin and the 5-pin is switched to the connection between the 4-pin and the 3-pin, so that the first locking pin REG+ and the second locking pin REG- in the DC converter are switched from disconnection to short circuit, and then the first locking pin REG+ and the second locking pin REG- in the battery assembly PACK are short-circuited by the target signal of the DC converter, the battery assembly PACK works again, specifically, the 2-pin of the optocoupler U4 in the battery assembly PACK is connected to the ground again, the optocoupler U4 starts to work and pulls the 4-pin of the optocoupler U4 to the ground, at this time, the second control signal becomes the first control signal again, when the MCU detects the first control signal, the relay RLY4 is controlled to be closed, at this time, the battery assembly PACK delivers the power of the power supply pin BAT+ and the power supply pin BAT- to the first power supply pin VBAT+ and the second power supply pin VBAT- of the output port CN10 and the output port CN12, and continues to provide power for the DC converter to work normally. It should be noted that the time from the disconnection of the relay RLY4 to the re-closing is very short, and the energy stored by the capacitor is used to power the load during this period, so as to ensure that the DC converter will not be powered off.At the same time, when the signal inputting into the positive input terminal "+" of the comparator unit U5B is changed from the second control signal to the first control signal, at the moment when the signal is changed to low level, the first auxiliary power supply VCC4 is divided into two parts by the resistor R11, the first feedback unit, i.e. the first diode D1 and the resistor R15, and then the voltage value of the positive input terminal "+" of the comparator unit U5B, i.e. the voltage value of the resistor R15 connected to the ground, is maintained to be greater than the voltage value of the negative input terminal "-", so that the comparator unit U5B continues to output high level, and the second switch 811, i.e. the transistor Q1, and the third switch 812, i.e. the transistor Q2, are cut off, and then the relay RLY5 keeps connected between the fourth pin and the third pin to maintain the short circuit of the target signal of the DC converter. It should be particularly pointed out that the device parameters should meet the following requirements: the voltage value of the second control signal should be higher than the voltage value of the negative input terminal "-" of the comparator unit U5B; when the second control signal is changed to the first control signal, the voltage value of the positive input terminal "+" of the comparator unit U5B, which is divided by the resistor R11, the first feedback unit, i.e. the first diode D1 and the resistor R15, should be higher than the voltage value of the negative input terminal "-".

[0093] In summary, in the above working conditions, the application of the circuit and method of the present application can prevent the occurrence of sparking at the connection port, not only improve the safety of the entire system, but also do not affect the original connection mode and working of the host computer and the battery assembly PACK and the package, so that the safety and reliability of the product and the safety of the user are better guaranteed.

[0094] For the convenience of understanding, in one of the optional embodiments, a support hot plug function of energy storage system is given in combination with FIG. 6, the support hot plug function of energy storage system includes a battery assembly PACK, two first external devices, one of which is a direct current converter, and the other is a host computer, and the specific working principle of the support hot plug function of energy storage system includes: when only one host computer is inserted, the port CN16 of the host computer and the output port CN14 of the battery assembly PACK are connected through the connection line unit, when the first control switch SW11 and the first control switch SW12 are in the open (disconnected) state, the battery assembly PACK does not work, the control signal output end of the battery assembly PACK outputs the second control signal, the high level second control signal enters the second switch control module 200, that is, the positive input end "+" of the comparator unit U6B, because the voltage value of the second control signal is higher than that of the negative input end "-", the comparator unit U6B outputs high level, that is, the second control switch module 200 outputs the fifth switch control signal, the fifth switch 411 of the third switch unit 410 of the fourth switch module, that is, the b pole of the triode Q5 is high level, the triode Q5 is cut off, the sixth switch 412 of the third switch unit 410 of the fourth switch module, that is, the triode Q6 is also cut off, the fourth switch unit 420 of the fourth switch module, that is, the relay RLY6 coil has no current loop, the relay RLY6 does not work, keeps the 4th pin and the 3rd pin connected (the 3rd pin is a normally closed switch), so that the first lock pin REG+ and the second lock pin REG- of the host computer are in short circuit state. When the first control switch SW11 and the first control switch SW12 are closed, the first lock pin REG+ and the second lock pin REG- in the battery assembly PACK are shorted by the target signal of the host computer, the battery assembly PACK works, the control signal output end of the battery assembly PACK outputs the second control signal, when the MCU detects the second control signal, the relay RLY7 is controlled to be closed, at this time the battery assembly PACK delivers the power of the power supply pin BAT+ and the power supply pin BAT- to the corresponding first power supply pin BAT+ and the second power supply pin BAT- of the output port CN14 and the output port CN15.At the same time, when the second control signal becomes the first control signal and enters the positive input terminal "+" of the second switch control module 200, i.e. the comparator unit U6B, at the moment when it becomes low, the first auxiliary power supply VCC6 is divided by the resistor R23, the second diode D2 and the resistor R30 to ground, so that the voltage value entering the positive input terminal "+" of the comparator unit U6B, i.e. the voltage value of the resistor R30 to ground, continues to maintain greater than the voltage value of the negative input terminal "-", that is, the second control switch module 200 outputs the fifth switch control signal, so that the comparator unit U6B continues to output high to make the triode Q5 and the triode Q6 cut off, and then make the relay RLY6 keep the 4th pin connected with the 3rd pin to maintain the signal first lock pin REG+ and the second lock pin REG- of the host short-circuited.

[0095] When the DC converter is connected to the battery assembly PACK first, i.e. the DC converter is connected to the output port CN15 of the battery assembly PACK first, the control signal output end of the battery assembly PACK outputs the first control signal, and the MCU detects the low level, controls the relay RLY7 to be closed, and the battery assembly PACK delivers the power of the power supply pin BAT+ and the power supply pin BAT- to the corresponding first power supply pin BAT+ and the second power supply pin BAT- of the output port CN14 and the output port CN15.

[0096] When the host is connected to the output port CN14 of the battery assembly PACK, the first control switch SW11 and the second control switch SW12 are still in the off state, the b electrode of the triode Q8 is low, the triode Q8 is off, the g electrode and the s electrode of the MOS tube Q7 are at the same potential, the MOS tube Q7 is off, the positive electrode of the capacitor in the host is disconnected from the first power supply pin VBAT+ of the port CN16, and the connection port will not spark when the host is connected. When the first control switch SW11 and the second control switch SW12 are closed, the first auxiliary power supply VCC6 enters the b electrode of the triode Q8 through the first control switch SW11, the second control switch SW12 and the resistor R32, the triode Q8 is turned on, the voltage of the first power supply pin VBAT+ is divided by the resistor R31 and the resistor R33, at this time the g electrode of the MOS tube Q7 is at a lower potential than the s electrode, that is, the Vgs voltage of the MOS tube Q7 is the voltage between the resistor R31, the MOS tube Q7 is turned on, the first power supply pin VBAT+ starts to charge the capacitor CE3, and the circuit starts to work normally. At the same time, the first control signal enters the second switch control module 200, that is, the positive input end "+" of the comparator unit U6B, the signal of the negative input end "-" of the comparator unit U6B is the voltage value between the resistor R27, that is, the voltage value after the first auxiliary power supply VCC6 is divided by the resistor R22 and the resistor R27, because the voltage value of the first control signal is lower than the voltage value between the resistor R27, the second control switch module 200 outputs the fourth switch control signal, that is, the comparator unit U6B outputs a low level, that is, the b electrode of the triode Q5 is pulled low, the triode Q5 is turned on, the first auxiliary power supply VCC6 enters the b electrode of the triode Q6 through the resistor R21, the triode Q5 and the resistor R28, so that the triode Q6 is turned on, that is, the third switch unit 410 outputs the sixth switch control signal, and then the second auxiliary power supply VCC5 forms a current loop through the fourth switch unit 420, that is, the relay RLY6 coil, the resistor R24, the triode Q6, and the relay RLY6 starts to work. The relay RLY6 is connected to the 4th and 3rd pins and switched to the 4th and 5th pins, so that the first lock pin REG+ and the second lock pin REG- in the host are switched from short circuit to open circuit, so that when the host and the DC converter are connected to the battery assembly PACK, the first lock pin REG+ and the second lock pin REG- of the battery assembly PACK are only shorted by the target signal of the DC converter, and two target signals do not exist at the same time.

[0097] When the host is connected first and then the DC converter is connected, the principle is the same as that described in Figure 5 when the host is connected first and then the DC converter is connected. When the DC converter is connected, the connection port will not spark, and only the target signal of the host exists, and two target signals do not exist at the same time.

[0098] When the host is connected first, the DC converter is connected second and both are working, if the host needs to be pulled out, only the first control switch SW11 or the first control switch SW12 is opened and the connecting line unit is pulled out. After being pulled out, the first locking pin REG+ and the second locking pin REG- of the battery assembly PACK are no longer shorted by the target signal of the host, the battery assembly PACK stops working, for example, the 2nd pin of the optocoupler U7 in the battery assembly PACK is suspended, the optocoupler U7 stops working, the first control signal becomes the second control signal, for example, from low level to high level, when the MCU detects the second control signal, the relay RLY7 is controlled to be opened, at this time, the first power supply pin VBAT+ and the second power supply pin VBAT- of the output port CN14 and the output port CN15 of the battery assembly PACK have no power, so that when the connecting line unit is pulled out, the connection port will not have a sparking phenomenon. At the same time, the second control signal enters the positive input end "+" of the comparator U7 in the DC converter, because the voltage value of the second control signal is higher than that of the negative input end "-", the comparator U7 outputs high level, that is, the b pole of the transistor Q9 is high level, the transistor Q9 is cut off, the transistor Q10 is also cut off, the second switch unit 820, that is, the relay RLY8 coil has no current loop, the relay RLY8 does not work, the connection between the 4th pin and the 5th pin is switched to the connection between the 4th pin and the 3rd pin, so that the first locking pin REG+ and the second locking pin REG- in the DC converter are switched from being disconnected to being shorted, and then the first locking pin REG+ and the second locking pin REG- in the battery assembly PACK are shorted by the target signal of the DC converter, the battery assembly PACK works again, for example, the 2nd pin of the optocoupler U7 is connected to the ground again, the optocoupler U7 starts to work, and pulls the 4th pin of the optocoupler U7 to the ground, at this time, the second control signal becomes the first control signal, when the MCU detects the first control signal, the relay RLY7 is controlled to be closed, at this time, the battery assembly PACK delivers the power of the first power supply pin BAT+ and the second power supply pin BAT- to the first power supply pin VBAT+ and the second power supply pin VBAT- of the output port CN14 and the output port CN15, and continues to provide power for the DC converter, so that it continues to work normally. It should be noted that the time from the disconnection of the relay RLY7 to the re-closing is very short, and the energy stored by the capacitor is supplied to the load during this period, so as to ensure that the DC converter will not be powered off. At the same time, because the signal entering the positive input end "+" of the comparator U7 changes from the second control signal to the first control signal, when it becomes low level, the first auxiliary power supply VCC4 is divided by the resistor R37, the diode D3 and the resistor R42 to the ground, so that the voltage value entering the positive input end "+" of the comparator U7, that is, the voltage value of the resistor R42 to the ground, continues to maintain greater than the voltage value of the negative input end "-", so that the comparator U7 continues to output high level to make the transistors Q9 and Q10 cut off, and then the relay RLY8 is kept in the connection between the 4th pin and the 3rd pin to maintain the target signal of the DC converter.

[0099] When the host is connected first, the DC converter is connected second, and both are working with load, if the DC converter needs to be pulled out, only the second control switch SW13 is opened and the connecting line unit is pulled out. After being pulled out, the b electrode of the triode Q12 changes from high level to low level, the triode Q12 is cut off, the g electrode and the s electrode of the MOS tube Q11 are at the same potential, the MOS tube Q11 is cut off, the first power supply pin VBAT+ and the second power supply pin VBAT- of the port CN17 cannot transport electricity, so that when the connecting line unit is pulled out, the connecting port will not cause a sparking phenomenon. At the same time, the battery assembly PACK continues to transport electricity to the host to work. When the DC converter is connected first, the host is connected second, and both are working with load, if the host needs to be pulled out, only the first control switch SW11 or the first control switch SW12 is opened and the connecting line unit is pulled out. After being pulled out, the b electrode of the fourth switch 920, i.e. the triode Q8 changes from high level to low level, the triode Q8 is cut off, the g electrode and the s electrode of the MOS tube Q7 are at the same potential, the MOS tube Q7 is cut off, the first power supply pin VBAT+ and the second power supply pin VBAT- of the port CN16 cannot transport electricity, so that when the connecting line unit is pulled out, the connecting port will not cause a sparking phenomenon. At the same time, the battery assembly PACK continues to transport electricity to the DC converter to work.

[0100] When the DC converter is connected first, then the host computer is connected and both are working, if the DC converter needs to be pulled out, only need to open the second control switch SW13 and pull out the connection line unit, after pulling out, the first lock pin REG+ and the second lock pin REG- of the battery assembly PACK are no longer shorted by the target signal of the DC converter, the battery assembly PACK does not work, specifically the 2 pin of the optocoupler U7 in the battery assembly PACK is suspended, the optocoupler U7 does not work, the first control signal becomes the second control signal, when the MCU detects the second control signal, the relay RLY7 is controlled to be opened, at this time, the first power supply pin VBAT+ and the second power supply pin VBAT- of the output port CN14 and the output port CN15 of the battery assembly PACK have no power, so that when the connection line unit is pulled out, the connection port will not have a sparking phenomenon. At the same time, the second control signal enters the positive input end "+" of the comparator unit U6B of the host computer, because the voltage value of the second control signal is higher than the voltage value of the negative input end "-", the comparator unit U6B outputs a high level, that is, the b electrode of the transistor Q5 is high, the transistor Q5 is cut off, the transistor Q6 is also cut off, the relay RLY6 coil has no current loop, the relay RLY6 does not work, the connection between the 4 pin and the 5 pin is switched to the connection between the 4 pin and the 3 pin, so that the first lock pin REG+ and the second lock pin REG- in the host computer are switched from being disconnected to being shorted, and then the first lock pin REG+ and the second lock pin REG- in the battery assembly PACK are shorted by the target signal of the host computer, the battery assembly PACK starts to work, that is, the 2 pin of the optocoupler U7 is connected to the ground again, the optocoupler U7 starts to work, and the 4 pin of the optocoupler U7 is pulled to the ground, at this time, the second control signal becomes the first control signal, when the MCU detects the first control signal, the relay RLY7 is controlled to be closed, at this time, the battery assembly PACK delivers the power of the power supply pin BAT+ and the power supply pin BAT- to the first power supply pin VBAT+ and the second power supply pin VBAT- of the output port CN14 and the output port CN15, and continues to provide power to the host computer, so that it continues to work normally. It should be noted that the time from the disconnection of the relay RLY7 to the re-closing is very short, and the energy stored by the capacitor is used to power the load during this period, so as to ensure that the host computer will not be powered off. At the same time, because the signal test1 entering the positive input end "+" of the comparator unit U6B changes from the second control signal to the first control signal, when it becomes a low level, the power supply VCC6 is divided by the resistor R23, the diode D2 and the resistor R30 to the ground, so that the voltage value entering the positive input end "+" of the comparator unit U6B, that is, the voltage value of the resistor R30 to the ground, continues to maintain greater than the voltage value of the negative input end "-", so that the comparator unit U6B continues to output a high level to make the transistors Q5 and Q6 cut off, and then the relay RLY6 remains connected to the 3 pin to maintain the target signal of the host computer.It should be noted that the device parameter design needs to meet the following requirements: the voltage value of the second control signal needs to be higher than the voltage value of the negative input terminal of the comparator; the voltage value of the first control signal entering the positive input terminal of the comparator needs to be higher than the voltage value of the negative input terminal.

[0101] In summary, by using the circuit and method of the present application, no sparking phenomenon occurs at the connection port regardless of whether the host or the DC converter is connected first, or whether the host or the DC converter is disconnected first, and only one short-circuit control signal exists.

[0102] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent application scope. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A signal bypass device, wherein, The application relates to a battery assembly and a first external device. The battery assembly is used for electrically interacting with at least one first external device. The first external device comprises a signal bypass module, which is used for bypassing a local target signal when the battery assembly has received a target signal of another external device, and the signal bypass module is also used for providing the battery assembly with the target signal when the battery assembly has not received the target signal of another external device.

2. The signal bypass device of claim 1, wherein, The signal bypass module comprises: A first switch control module, a first input end of the first switch control module is connected with a control signal output end of the battery assembly, and a second input end of the first switch control module inputs a fixed voltage; A second switch module, a control end of the second switch module is connected with an output end of the first switch control module; the first switch control module is used for outputting a first switch control signal based on the first control signal and the fixed voltage when the control signal output end of the battery assembly outputs a first control signal; and the second switch module is used for switching a short-circuit state of a first locking pin and a second locking pin of the first external device into a disconnected state under the action of the first switch control signal.

3. The signal bypass device of claim 1, wherein, The application further comprises: A second external device, which is connected with the battery assembly and is used for providing the battery assembly with a target signal when the battery assembly has not received the target signal of the first external device.

4. The signal bypass device of claim 2 or 3, wherein, The first switch control module is also used for outputting a second switch control signal when the control signal output end of the battery assembly outputs a second control signal; and the second switch module is also used for maintaining the short-circuit state of the first locking pin and the second locking pin of the first external device under the action of the second switch control signal.

5. The signal bypass device of claim 4, wherein, The second switch module comprises: A first switch unit, a control end of the first switch unit is connected with an output end of the first switch control module; A second switch unit, a control end of the second switch unit is connected with an output end of the first switch unit; the first switch unit is used for outputting a third switch control signal under the action of the first switch control signal, and the second switch unit is used for switching from connecting the first end and the second end to connecting the second end and the third end under the action of the third switch control signal.

6. The signal bypass device of claim 5, wherein, The first switch unit comprises: A second switch, a control end of the second switch is connected with an output end of the first switch control module, and a first end of the second switch is connected with a second auxiliary power supply; A third switch, a control end of the third switch is connected with a second end of the second switch, a first end of the third switch is connected with the ground, and a second end of the third switch is connected with a control end of the second switch unit.

7. The signal bypass device of claim 5, wherein, The second switch unit is a relay, a control end of the relay is connected with a second end of the first switch unit, a first end of the relay is connected with the first locking pin of the battery assembly, a second end of the relay is connected with the second locking pin of the battery assembly, and a third end of the relay is suspended.

8. The signal bypass device of claim 4, wherein, The first switch control module is a comparator unit, and a voltage value of the first control signal input to a first input end of the comparator unit is less than the fixed voltage.

9. The signal bypass device of claim 8, wherein, The signal bypass device comprises at least one first external device; or the signal bypass device comprises a second external device and at least one first external device.

10. The signal bypass device of claim 9, wherein, The first switch control module further comprises: A feedback unit, a first end of the feedback unit is connected with a first auxiliary power supply through a voltage dividing resistor, and a second end of the feedback unit is connected with a first input end of the comparator unit; the feedback unit is used for obtaining a feedback signal by processing the first auxiliary power supply at the moment when the first input end of the comparator unit is switched from the second control signal to the first control signal, inputting the feedback signal to the first input end of the comparator unit, and the voltage of the feedback signal is greater than the fixed voltage; the first switch control module is used for outputting a second switch control signal when the first input end inputs the feedback signal and the second input end inputs the fixed voltage; and the second switch module is used for outputting the target signal to the battery assembly under the action of the second switch control signal.

11. The signal bypass device of claim 9, wherein, The first external device is a direct current converter or a host computer; and the second external device is a direct current converter or a host computer.

12. The signal bypass device of claim 11, wherein, The first external device is a direct current converter, and the second external device is a host computer; the direct current converter comprises a second control switch; the direct current converter is used for being in a conduction state of the second control switch when being connected to the battery assembly, and being electrically interacted with the battery assembly; when the host computer provides a target signal to the battery assembly, the target signal of the direct current converter is bypassed; and when the host computer does not provide a target signal to the battery assembly, the direct current converter provides a target signal to the battery assembly, and the target signal is used for controlling the battery assembly to start working to be electrically interacted with the direct current converter and the host computer connected to the battery assembly.

13. The signal bypass device of claim 12, wherein, A first end of the second control switch inputs a first auxiliary power supply; and the direct current converter further comprises a first switch module, a control end of the first switch module is connected with a second end of the second control switch. When the direct current converter is connected to the battery assembly, a first end of the first switch module is connected to a first power supply pin of the battery assembly, a second end of the first switch module is connected to a first input end of the direct current converter, and a second input end of the direct current converter is connected to a second power supply pin of the battery assembly; the first switch module is configured to disconnect the battery assembly from the direct current converter in the case that the second control switch is in an open state.

14. The signal bypass device of claim 13, wherein, The first switch module comprises: a first switch control unit, a control end of the first switch control unit being connected to a second end of the second control switch; a first switch, a control end of the first switch being connected to an output end of the first switch control unit, a first end of the first switch being connected to the first power supply pin of the battery assembly, a second end of the first switch being connected to the first input end of the direct current converter, and a second input end of the direct current converter being connected to the second power supply pin of the battery assembly; the first switch control unit is configured to output a disconnect signal to the first switch in the case that the second control switch is in the open state, and the first switch is configured to disconnect the battery assembly from the direct current converter based on the disconnect signal.

15. The signal bypass device of claim 14, wherein, The first switch module is further configured to realize the electrical interaction between the battery assembly and the direct current converter in the case that the second control switch is in a closed state.

16. The signal bypass device of claim 11, wherein, The first external device is a direct current converter, and the second external device is a host; the host comprises a first control switch; the host is configured to electrically interact with the battery assembly when the first control switch is in a conductive state, and bypass a target signal of the host when the direct current converter provides the target signal to the battery assembly.

17. The signal bypass device of claim 16, wherein, a first end of the first control switch is connected to a third auxiliary power supply; the host further comprises: a third switch module, a control end of the third switch module being connected to a second end of the first control switch; When the host is connected to the battery assembly, a first end of the third switch module is connected to the first power supply pin of the battery assembly, a second end of the third switch module is connected to a first input end of the host, and a second input end of the host is connected to the second power supply pin of the battery assembly; the third switch module is configured to disconnect the battery assembly from the host in the case that the first control switch is in the open state.

18. The signal bypass device of claim 17, wherein, The third switch module comprises: a second switch control unit, a control end of the second switch control unit being connected to the second end of the first control switch; a fourth switch, a control end of the fourth switch being connected to an output end of the second switch control unit, a first end of the fourth switch being connected to the first power supply pin of the battery assembly, a second end of the fourth switch being connected to the first input end of the host, and a second input end of the host being connected to the second power supply pin of the battery assembly; The second switch control unit is configured to output an open signal to the fourth switch when the first control switch is in an open state, and the fourth switch is configured to open the electrical interaction between the battery assembly and the host based on the open signal.

19. The signal bypass device of claim 18, wherein, The third switch module is further configured to realize the electrical interaction between the battery assembly and the host when the first control switch is in a closed state.

20. An energy storage system, wherein, A signal bypass device as claimed in any of claims 1 to 19.

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