Management method of high-power circuit, power battery and electronic equipment

Abstract

The invention provides a management method of a high-power circuit, a power battery and electronic equipment, the method is applied to the high-power circuit, the high-power circuit comprises a transistor branch and a relay branch, the transistor branch and the relay branch are connected in parallel, and the method comprises the following steps: when a charging instruction or a discharging instruction is received, the relay branch is connected in parallel with the transistor branch; according to the transmission power of the transistor branch and first preset power, determining a transistor of the transistor branch needing to be opened as a main power loop; when it is detected that the working power is larger than or equal to second preset power, all transistors of the transistor branch are locked to be in an on state, and the second preset power is larger than the first preset power; when it is detected that the working power is larger than or equal to second preset power and the absolute value of the working current of the high-power circuit is larger than a preset current threshold value, the relay branch is opened to serve as a main power loop, all transistors of the transistor branch are locked to be opened, and the transistor branch serves as an auxiliary power loop.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a high-power circuit management method, a power battery and an electronic device. BACKGROUND

[0002] At present, high-voltage power circuits are widely used in energy storage systems (200V-400VDC), high-power switching power supplies and other equipment, and the high-voltage power circuits need to face the on-off management problem. The high-voltage power circuits on the market often manage the on-off through some special devices, for example, high-voltage MOS, high-voltage IGBT and high-voltage relay. These special devices have defects when used alone, for example, single MOS scheme: the higher the voltage resistance, the greater the power consumption, and a large number of parallel connections are required; single relay scheme: cannot be turned off with large current, and turning off is easy to arc explosion. These schemes still have safety hazards when used to handle the on-off management problem of high-voltage power circuits. SUMMARY

[0003] The present application provides a high-power circuit management method, a power battery and an electronic device, which are used to reduce the safety hazards when handling the on-off management problem of high-voltage power circuits.

[0004] In a first aspect, an embodiment of the present application provides a high-power circuit management method applied to a high-power circuit, the high-power circuit comprising a transistor branch and a relay branch, the transistor branch and the relay branch being connected in parallel, and the method comprising: when a charging instruction or a discharging instruction is received, determining a transistor of the transistor branch that needs to be turned on as a main power circuit according to a transmission power of the transistor branch and a first preset power; when the working power is detected to be greater than or equal to a second preset power, locking all transistors of the transistor branch in an on state, the second preset power being greater than the first preset power; when the working power is detected to be greater than or equal to the second preset power and an absolute value of a working current of the high-power circuit is greater than a preset current threshold, turning on the relay branch as a main power circuit and locking all transistors of the transistor branch in an on state, the transistor branch being a auxiliary power circuit.

[0005] In some embodiments, the transistor branch comprises a charging transistor and a discharging transistor, and the step of determining a transistor of the transistor branch that needs to be turned on as a main power circuit according to a transmission power of the transistor branch and a first preset power when a charging instruction or a discharging instruction is received comprises: if the charging instruction is received, turning on the charging transistor and taking the charging transistor as a main power circuit; if the discharge instruction is received, the discharge transistor is turned on, and the discharge transistor is used as a main power loop; if, after the charge instruction is received or the discharge instruction is received, it is detected that the working power of the high-power circuit is greater than or equal to the first preset power, the charge transistor and the discharge transistor are turned on, and the charge transistor and the discharge transistor are used as the main power loop.

[0006] In some embodiments, after the relay branch is turned on as the main power loop, the method further includes: if it is detected that the working power is greater than or equal to the second preset power and the absolute value of the working current of the high-power circuit is less than the preset current threshold, the relay branch is turned off, all the transistors of the transistor branch are locked in the turned-on state, and the transistor branch is used as the main power loop.

[0007] In some embodiments, after all the transistors of the transistor branch are locked in the turned-on state, the method further includes: if it is detected that the working power is less than the second preset power, the turned-on state of all the transistors of the transistor branch is released.

[0008] In some embodiments, if the turned-on state of all the transistors of the transistor branch is not locked, the method further includes: if a preset turn-off signal is detected, all the transistors of the transistor branch are turned off to turn off the transistor branch.

[0009] In some embodiments, the transistor branch includes a first self-locking unit, and the relay branch includes a second self-locking unit, and the method further includes: the transistors of the transistor branch are controlled by the first self-locking unit to be in the turned-on locked state; the relay of the relay branch is controlled by the second self-locking unit to be in the turned-on locked state.

[0010] In a second aspect, the embodiments of the present application provide a power battery, including: a lithium battery and a high-power circuit, the high-power circuit including: a transistor branch and a relay branch, the transistor branch and the relay branch being connected in parallel, the transistor branch and the relay branch being arranged at a positive electrode of the lithium battery or a negative electrode of the lithium battery, and the high-power circuit being used to perform the management method of the high-power circuit as any one of the embodiments of the present application.

[0011] In some embodiments, the transistor branch includes: a first self-locking unit, a discharge transistor, and a charge transistor, the relay branch includes: a relay, a diode, and a second self-locking unit. The source of the discharging transistor is connected with the positive pole of the lithium battery, the drain of the discharging transistor is connected with the drain of the charging transistor, the source of the charging transistor is used as the external positive pole of the high-power circuit, the gate of the discharging transistor and the gate of the charging transistor are both connected with the control unit through the first self-locking unit, the first switch terminal of the relay is connected with the source of the discharging transistor, the second switch terminal of the relay is connected with the source of the charging transistor, the first power supply terminal of the relay is connected with the cathode of the diode and the output terminal of the second self-locking unit respectively, the second power supply terminal of the relay is connected with the anode of the diode, and the first input terminal and the second input terminal of the second self-locking unit are both connected with the control unit.

[0012] In some embodiments, the high-power circuit further comprises a substrate, and the transistors of the transistor branch are mounted on the substrate, and the relay of the relay branch is across the transistors of the transistor branch.

[0013] In a third aspect, an electronic device is provided, and the electronic device includes the power battery according to any one of the embodiments of the power battery.

[0014] The embodiments of the present application provide a management method of a high-power circuit. The method is applied to a high-power circuit, and the high-power circuit includes a transistor branch and a relay branch. The transistor branch and the relay branch are connected in parallel. The method includes the following steps: when a charging instruction or a discharging instruction is received, determining the transistors of the transistor branch that need to be turned on as a main power circuit according to the transmission power of the transistor branch and a first preset power; when it is detected that the working power is greater than or equal to a second preset power, locking all the transistors of the transistor branch in an on state, and the second preset power is greater than the first preset power; when it is detected that the working power is greater than or equal to the second preset power and the absolute value of the working current of the high-power circuit is greater than a preset current threshold, turning on the relay branch as a main power circuit and locking all the transistors of the transistor branch in an on state, and the transistor branch is used as an auxiliary power circuit. In the above method, the relay branch is used as a high-power main path, the transistor branch is used as an auxiliary path in a high-power scene, and a scheme for preventing the relay and the transistor from malfunctioning is formed by combining software logic and hardware self-locking, so as to ensure the stable operation of the high-power circuit. In the on-off management process of the high-voltage power circuit, the safety problems such as arc, space occupation and heat generation are solved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0016] Figure 1 A first high-power circuit schematic diagram provided by the embodiments of the present application; Figure 2 A second high-power circuit schematic diagram provided by the embodiments of the present application; Figure 3 A high-power circuit management method schematic flow chart provided by the embodiments of the present application; Figure 4 A high-power circuit state change schematic diagram provided by the embodiments of the present application; Figure 5 A power battery circuit schematic diagram provided by the embodiments of the present application; Figure 6 A high-power circuit structure schematic diagram provided by the embodiments of the present application.

[0017] Reference signs 100, high-power circuit; 101, transistor branch; ZS1, first self-locking unit; Q1, discharge transistor; Q2, charging transistor; 102, relay branch; K1, relay; D1, diode; ZS2, second self-locking unit; 103, control unit; 104, substrate; 200, power battery; 201, lithium battery. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present application more clear, the embodiments of the present application will be described in combination with the drawings in the embodiments of the present application.

[0019] The terms "first" and "second" and the like in the specification, claims and drawings of the present application are used to distinguish different objects, and are not used to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device and the like that includes a series of steps or units is not limited to the listed steps or units, but can optionally include other steps or units not listed or inherent to the process, method, product or device.

[0020] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase that in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. Those skilled in the art will appreciate from the present description that embodiments described herein can be combinable with other embodiments.

[0021] It should be understood that, in the present application, "at least one" means one or more, "multiple" means two or more, "at least two" means two or three and three or more, and "and / or" is used to describe the relationship between the associated objects, which means that there can be three relationships, for example, "A and / or B" can mean: only A, only B, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects. "At least one of the following" or the like means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0022] Please refer to Figure 1 , Figure 1 is a schematic diagram of a high-power circuit provided by an embodiment of the application. As shown in Figure 1 , the high-power circuit 100 includes a transistor branch 101 and a relay branch 102, the transistor branch 101 and the relay branch 102 are connected in parallel, and the transistor branch 101 and the relay branch 102 are arranged at the positive electrode of the lithium battery 201 or the negative electrode of the lithium battery 201.

[0023] As shown in Figure 1 , the transistor branch 101 includes a first self-locking unit ZS1, a discharge transistor Q1, and a charging transistor Q2, and the relay branch 102 includes a relay K1, a diode D1, and a second self-locking unit ZS2. The discharge transistor Q1 and the charging transistor Q2 are both PMOS transistors.

[0024] The source of the discharging transistor Q1 is connected with the positive pole of the lithium battery 201, the drain of the discharging transistor Q1 is connected with the drain of the charging transistor Q2, the source of the charging transistor Q2 is used as the external positive pole of the high-power circuit 100, the gate of the discharging transistor Q1 and the gate of the charging transistor Q2 are both connected with the control unit through the first self-locking unit ZS1, the first switch terminal of the relay K1 is connected with the source of the discharging transistor Q1, the second switch terminal of the relay K1 is connected with the source of the charging transistor Q2, the first power supply terminal of the relay K1 is connected with the cathode of the diode D1 and the output terminal of the second self-locking unit ZS2 respectively, the second power supply terminal of the relay K1 is connected with the anode of the diode D1, and the first input terminal and the second input terminal of the second self-locking unit ZS2 are both connected with the control unit.

[0025] In another embodiment, as shown in Figure 2 , the high-power circuit 100 can also be used for the negative pole of the lithium battery 201, and when the high-power circuit 100 is used for different poles, the corresponding components need to be changed accordingly, for example, the transistor is replaced by an NMOS tube.

[0026] Please refer to Figure 3 , Figure 3 is a schematic flow chart of a management method of a high-power circuit provided by the embodiment of the present application. As shown in Figure 3 , the specific steps of the management method of the high-power circuit include S301-S303.

[0027] S301, when receiving a charging instruction or a discharging instruction, determining the transistor of the transistor branch that needs to be turned on as the main power circuit according to the transmission power of the transistor branch and the first preset power.

[0028] For example, as shown in Figure 1 , when the transmission power of the transistor branch 101 is less than the first preset power, only part of the transistors of the transistor branch 101 need to be turned on as the main power circuit, for example, the discharging transistor Q1 is turned on when receiving the discharging instruction, and for example, the charging transistor Q2 is turned on when receiving the charging instruction. At this time, the transmission power is low, and turning on part of the transistors will not cause the transistor to overheat under the corresponding transmission power. When the transmission power of the transistor branch 101 is greater than or equal to the first preset power, turning on part of the transistors may cause the transistor to overheat, therefore, the discharging transistor Q1 and the charging transistor Q2 need to be turned on as the main power circuit to prevent the transistor from overheating.

[0029] S302, when detecting that the working power is greater than or equal to the second preset power, locking all the transistors of the transistor branch to be in the turned-on state, and the second preset power is greater than the first preset power.

[0030] For example, when the delivered power (discharge power or charge power) of the high-power circuit 100 is greater than or equal to the second preset power, the discharge transistor Q1 and the charge transistor Q2 are in a holding state, and the high-power circuit 100 enters a transistor holding state. In the transistor holding state, the discharge transistor Q1 and the charge transistor Q2 are controlled by the self-holding circuit designed by hardware. At this time, if the software is reset, the driving signal of the control transistor will not be affected, ensuring that the discharge transistor Q1 and the charge transistor Q2 remain open.

[0031] S303, when it is detected that the working power is greater than or equal to the second preset power and the absolute value of the working current of the high-power circuit is greater than the preset current threshold, the relay branch is opened as the main power circuit, and all the transistors of the transistor branch are locked to be open, and the transistor branch is used as the auxiliary power circuit.

[0032] For example, if it is detected that the delivered current of the high-power circuit 100 in the transistor holding state (S5) exceeds the preset current threshold, the relay branch 102 will be opened and used as the main power circuit, and the transistor branch 101 is used as the auxiliary power circuit, and the high-power circuit 100 enters a steady state (S6). At this time, since the relay branch 102 is opened on the basis that the transistors of the transistor branch 101 are in the holding state, the voltage difference across the relay K1 is very low, and the main power circuit is in a stable state, and dangerous working conditions such as arc drawing do not occur. The addition of the relay branch 102 effectively alleviates the overheating problem that may occur in the transistor branch 101 during high-power transmission.

[0033] However, in the case of high-power transmission, even if the second self-holding unit ZS2 exists, the relay K1 may flash off (e.g., due to vibration), causing the relay branch 102 to be disconnected. Since the transistor branch 101 is used as the auxiliary power circuit, even if the relay K1 flashes off, the transistor branch 101 can replace the relay branch 102 as the main power circuit, and the power supply of the high-power circuit 100 will not be affected, thereby avoiding the occurrence of arc explosion and the like.

[0034] The embodiment of the application provides a kind of high power circuit management method, this method is applied to high power circuit, high power circuit includes: transistor branch and relay branch, transistor branch and relay branch are parallel, this method includes: when receiving charging instruction or discharging instruction, according to the delivery power of transistor branch and first preset power Determine the transistor of transistor branch that needs to be opened as main power loop;When detecting that operating power is greater than or equal to second preset power, lock all transistors of transistor branch as open state, second preset power is greater than first preset power;When detecting that operating power is greater than or equal to second preset power, and the absolute value of operating current of high power circuit is greater than preset current threshold, open relay branch as main power loop, and lock all transistors of transistor branch to open, transistor branch as auxiliary power loop.In the above method, by taking relay branch as high-power main path, transistor branch is used as auxiliary path in high-voltage scene, and software logic and hardware self-locking are matched to form a scheme to prevent relay and transistor misoperation, ensuring stable operation of high-power circuit, and solving the safety problems such as arc extinguishing, space occupation and heating in the on-off management process of high-voltage power circuit.

[0035] In order to more clearly introduce the technical scheme of the application, the technical scheme of the application will be introduced through specific embodiments below. It should be noted that the specific embodiments are used to expand the description of the technical scheme of the application, and not to limit the application.

[0036] In some embodiments, the transistor branch 101 includes a charging transistor Q2 and a discharging transistor Q1. When receiving a charging instruction or a discharging instruction, the transistor of the transistor branch 101 that needs to be opened is determined as a main power loop according to the delivery power of the transistor branch 101 and a first preset power. If a charging instruction is received, the charging transistor Q2 is opened and used as the main power loop. If a discharging instruction is received, the discharging transistor Q1 is opened and used as the main power loop. After receiving the charging instruction or the discharging instruction, if it is detected that the operating power of the high power circuit 100 is greater than or equal to the first preset power, the charging transistor Q2 and the discharging transistor Q1 are opened, and the charging transistor Q2 and the discharging transistor Q1 are used as the main power loop.

[0037] For example, the initial state of the high power circuit 100 is the shutdown state (S1). In the shutdown state, the transistor branch 101 and the relay branch 102 are both in the closed state. The shutdown state (S1) occurs in the case of shutdown, protection, etc. (charging, discharging, and short circuit, etc.).

[0038] For example, the initial state of the high power circuit 100 is the shutdown state (S1). In the shutdown state, the transistor branch 101 and the relay branch 102 are both in the closed state. The shutdown state (S1) occurs in the case of shutdown, protection, etc. (charging, discharging, and short circuit, etc.). Figure 1As shown, when the high-power circuit 100 receives a discharge command (button command or software command), the high-power circuit 100 enters the output-only state (S2), turning on the discharge transistor Q1. In the output-only state (S2), the main power circuit of the high-power circuit 100 allows current to flow from B+ to P+ and from P- to B-. In the output-only state (S2), if an overcurrent discharge protection or shutdown occurs, it will return to the shutdown state (S1).

[0039] like Figure 1 As shown, when the high-power circuit 100 receives a charging command (charger insertion or software command), the high-power circuit 100 enters the on-only input state (S3), turning on the charging transistor Q2. In the on-only input state (S3), the main power circuit of the high-power circuit 100 allows current to flow from P+ to B+ and from B- to P-. In the on-only input state (S3), if charging overcurrent protection, charger removal, or power-off occurs, it will return to the power-off state (S1).

[0040] In both the output-only (S2) and input-only (S3) states, when the power output (discharge or charge) of the high-power circuit 100 exceeds the first preset power, both the discharge transistor Q1 and the charge transistor Q2 are fully turned on, and the high-power circuit 100 enters the fully-on transistor state (S4), ensuring the normal operation of the main power circuit. In the fully-on transistor state (S4), the main power circuit allows current to flow from P+ to B+, from B+ to P+, from B- to P-, and from P- to B-. If a protection (charging, discharging) or shutdown condition occurs in the fully-on transistor state (S4), the circuit will return to the shutdown state (S1) to ensure no dangerous operating conditions occur.

[0041] In some embodiments, after turning on the relay branch 102 as the main power circuit, the method further includes: when the operating power is detected to be greater than or equal to a second preset power and the absolute value of the operating current of the high power circuit 100 is less than a preset current threshold, turning off the relay branch 102, locking all transistors in the transistor branch 101 to be turned on, and the transistor branch 101 to be the main power circuit.

[0042] For example, when the high-power circuit 100 is in the steady state (S6), the relay branch 102 serves as the main power circuit, and when the absolute value of the working current of the high-power circuit 100 is less than the preset current threshold, the high-power circuit 100 has actually exited the state of high-power transmission, and the high-power circuit 100 can return to the transistor maintaining state (S5). In the transistor maintaining state (S5), the current transmission requirement can be met by the transistor branch 101, and the transistor branch 101 can further support autonomous protection and the like. Therefore, the relay K1 of the relay branch 102 needs to be exited from the self-locking state, and the relay K1 of the relay branch 102 is turned off, so that the flexibility of the autonomous protection of the relay K1 can be improved.

[0043] In some embodiments, after all the transistors of the transistor branch 101 are in the on state, the method further includes: when it is detected that the working power is less than the second preset power, the on state locking of all the transistors of the transistor branch 101 is released.

[0044] For example, when the working power of the high-power circuit 100 in the transistor maintaining state (S5) is further reduced, that is, the working power is less than the second preset power, the high-power circuit 100 can return to the transistor full-on state (S4). In the transistor full-on state (S4), the transistors of the transistor branch 101 can withstand the off effect of the working power, and the on state locking applied to the transistors in the transistor maintaining state (S5) needs to be released, so that the flexibility of the autonomous protection of the transistor branch 101 can be improved.

[0045] In some embodiments, if the on state of all the transistors of the transistor branch 101 is not locked, the method further includes: if a preset off signal is detected, turning off all the transistors of the transistor branch 101 to turn off the transistor branch 101.

[0046] For example, the preset off signal includes a shutdown signal, a short-circuit protection signal, an overload protection signal and the like, and when the control unit detects such a signal, the high-power circuit 100 can be controlled to shut down.

[0047] In some embodiments, the transistor branch 101 includes a first self-locking unit ZS1, the relay branch 102 includes a second self-locking unit ZS2, and the method further includes: controlling the transistors of the transistor branch 101 to be in the on locking state by the first self-locking unit ZS1; and controlling the relay K1 of the relay branch 102 to be in the on locking state by the second self-locking unit ZS2.

[0048] For example, the transistors of the transistor branch 101 are controlled to be in an open locking state by the first self-locking unit ZS1. The transistors are controlled by the first self-locking unit ZS1 designed by hardware. If the control program of the control unit is reset, the driving signal of the transistors will not be affected, ensuring that the transistor branch 101 will not be turned off. The second self-locking unit ZS2 is used to ensure that the driving signal of the relay branch 102 will not be affected.

[0049] In a specific embodiment, please refer to Figure 4 , Figure 4 A state change schematic diagram of the high-power circuit is shown. As Figure 4 shown, the states of the high-power circuit 100 include: a shutdown state (S1), an output-only on state (S2), an input-only on state (S3), a transistor full-on state (S4), a transistor holding state (S5), and a steady state (S6).

[0050] As Figure 4 shown, in the shutdown state (S1), the transistor branch 101 and the relay branch 102 are both in a closed state.

[0051] In the output-only on state (S2) or the input-only on state (S3), only part of the transistor branch 101 (such as the discharge transistor Q1 or the charging transistor Q2) is turned on.

[0052] In the transistor full-on state (S4), all the transistors of the transistor branch 101 are turned on.

[0053] In the transistor holding state (S5), the transistor branch 101 enters a holding state (i.e., an open locking state).

[0054] In the steady state (S6), the transistor branch 101 and the relay branch 102 are both in an open state.

[0055] When in the transistor full-on state (S4), if the discharge current exceeds a preset current threshold (or a second preset power), the first self-locking unit ZS1 will act to lock the open state of all the transistors of the transistor branch 101, and the transistors cannot be directly turned off. The high-power circuit 100 switches to the transistor holding state (S5).

[0056] When the high-power circuit 100 is in the transistor holding state (S5), if the working current (absolute value) continues to increase and exceeds the preset current threshold, the relay branch 102 is turned on, and the high-power circuit 100 enters the steady state (S6).

[0057] When the high-power circuit 100 is in the steady state (S6), the working current (absolute value) decreases to below the preset current threshold, the relay branch 102 is closed, and the high-power circuit 100 returns to the transistor holding state (S5).

[0058] When the high-power circuit 100 is in the transistor full-on state (S4), only the transistor branch 101 is turned on at this time, and any protection such as short-circuit protection can be performed.

[0059] When the high-power circuit 100 is in the transistor holding state (S5), only the transistor branch 101 is still turned on at this time, but the transistor cannot be directly turned off due to the action of the first self-locking unit ZS1, and the relay branch 102 is prepared in advance.

[0060] When the high-power circuit 100 is in the steady state (S6), the voltage across the relay branch 102 is almost zero due to the action of the transistor branch 101, so the relay branch 102 can be switched at any time without arc. At the same time, the transistor branch 101 is forced to be turned on by the first self-locking unit ZS1, and even if the relay branch 102 is flashed (such as vibration), it will not affect the power supply of the entire high-power circuit 100.

[0061] The state switching of the entire high-power circuit 100 is logically controlled, and is sequentially switched according to the state change logic as shown in Figure 4 , which realizes reliable management of the power path of high voltage and large current.

[0062] The embodiment of the application also provides a power battery, please refer to Figure 5 , Figure 5 shows a circuit schematic diagram of a power battery 200 provided by the embodiment of the application.

[0063] As shown in Figure 5 , the power battery 200 includes a lithium battery 201 and a high-power circuit 100, the high-power circuit 100 includes a transistor branch 101 and a relay branch 102, the transistor branch 101 and the relay branch 102 are connected in parallel, the transistor branch 101 and the relay branch 102 are arranged at the positive electrode of the lithium battery 201 or the negative electrode of the lithium battery 201, and the high-power circuit 100 is used to perform the management method of the high-power circuit 100 according to any one of the embodiments of the application.

[0064] In some embodiments, as Figure 5As shown, the transistor branch 101 includes: a first self-locking unit ZS1, a discharge transistor Q1 and a charging transistor Q2, the relay branch 102 includes: a relay K1, a diode D1 and a second self-locking unit ZS2; the source of the discharge transistor Q1 is connected with the positive pole of the lithium battery 201, the drain of the discharge transistor Q1 is connected with the drain of the charging transistor Q2, the source of the charging transistor Q2 is the external positive pole of the high-power circuit 100, the gate of the discharge transistor Q1 and the gate of the charging transistor Q2 are connected with the control unit through the first self-locking unit ZS1, the first switch terminal of the relay K1 is connected with the source of the discharge transistor Q1, the second switch terminal of the relay K1 is connected with the source of the charging transistor Q2, the first power supply terminal of the relay K1 is connected with the cathode of the diode D1 and the output terminal of the second self-locking unit ZS2 respectively, the second power supply terminal of the relay K1 is connected with the anode of the diode D1, the first input terminal and the second input terminal of the second self-locking unit ZS2 are connected with the control unit. In some embodiments, please refer to Figure 6 , Figure 6 A structural schematic diagram of a high-power circuit is shown.

[0065] As shown in Figure 6 , the high-power circuit 100 further includes: a substrate, the transistors of the transistor branch 101 are mounted on the substrate, the relay K1 of the relay branch 102 is across the transistors (the discharge transistor Q1 and the charging transistor Q2) of the transistor branch 101.

[0066] For example, as shown in Figure 5 , the relay K1 is assembled on a metal support, the metal support is a metal material with a specific shape (L-shaped part). The relay K1 and the metal support form a relay K1 module, the metal support serves as both a conductor to pass current and a support to hold up the relay K1. Then the relay K1 module is assembled on a substrate, the substrate is a PCB, and the relay K1 module is across the transistors. This layout improves the space utilization of the PCB, and according to the principle of the shortest path of current, this stacked structure can meet the consistency of the current passing through the transistors and the relay K1, ensuring current sharing and temperature rise.

[0067] The embodiments of the present application further provide an electronic device, and the electronic device includes the power battery according to any one of the embodiments of the present application.

[0068] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements shall be covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of managing a high power circuit, characterized in that, The method is applied to a high-power circuit, the high-power circuit comprising: a transistor branch and a relay branch, the transistor branch and the relay branch being in parallel, and the method comprising: when a charging instruction or a discharging instruction is received, determining, according to a delivered power of the transistor branch and a first preset power, a transistor of the transistor branch that needs to be turned on as a main power loop; when it is detected that the working power is greater than or equal to a second preset power, locking all transistors of the transistor branch in an on state, the second preset power being greater than the first preset power; when it is detected that the working power is greater than or equal to the second preset power and an absolute value of a working current of the high-power circuit is greater than a preset current threshold, turning on the relay branch as a main power loop and locking all transistors of the transistor branch in an on state, the transistor branch being a secondary power loop.

2. The management method of a high power circuit according to claim 1, characterized in that, The transistor branch comprises a charging transistor and a discharging transistor, and the step of determining, according to the delivered power of the transistor branch and the first preset power, the transistor of the transistor branch that needs to be turned on as the main power loop comprises: if the charging instruction is received, turning on the charging transistor and taking the charging transistor as the main power loop; if the discharging instruction is received, turning on the discharging transistor and taking the discharging transistor as the main power loop; after the charging instruction or the discharging instruction is received, if it is detected that the working power is greater than or equal to the first preset power, turning on the charging transistor and the discharging transistor and taking the charging transistor and the discharging transistor as the main power loop.

3. The method of claim 1, wherein the high power circuit is a power amplifier. After the relay branch is turned on as the main power loop, the method further comprises: if it is detected that the working power is greater than or equal to the second preset power and the absolute value of the working current of the high-power circuit is less than the preset current threshold, turning off the relay branch and locking all transistors of the transistor branch in the on state, the transistor branch being the main power loop.

4. The method of claim 1, wherein, After all transistors of the transistor branch are locked in the on state, the method further comprises: if it is detected that the working power is less than the second preset power, releasing the on state locking of all transistors of the transistor branch.

5. The method of managing high power circuits according to any one of claims 1 or 4, wherein, If the on state of all transistors of the transistor branch is not locked, the method further comprises: if a preset off signal is detected, turning off all transistors of the transistor branch to turn off the transistor branch.

6. The method of claim 1, wherein, The transistor branch comprises a first self-locking unit, the relay branch comprises a second self-locking unit, and the method further comprises: controlling, by the first self-locking unit, the transistors of the transistor branch to be in the on locking state; controlling, by the second self-locking unit, the relay of the relay branch to be in the on locking state.

7. A power cell, characterized by The power battery comprises a lithium battery and a high-power circuit, the high-power circuit comprises a control unit, a transistor branch and a relay branch, the transistor branch and the relay branch are in parallel, the transistor branch and the relay branch are arranged on the positive electrode of the lithium battery or the negative electrode of the lithium battery, and the high-power circuit is used for executing the management method of the high-power circuit according to any one of claims 1 to 6.

8. The power cell of claim 7, wherein, The transistor branch comprises a first self-locking unit, a discharge transistor and a charge transistor, and the relay branch comprises a relay, a diode and a second self-locking unit. The source of the discharge transistor is connected with the positive electrode of the lithium battery, the drain of the discharge transistor is connected with the drain of the charge transistor, the source of the charge transistor is used as an external positive electrode of the high-power circuit, the gate of the discharge transistor and the gate of the charge transistor are connected with the control unit through the first self-locking unit, the first switch terminal of the relay is connected with the source of the discharge transistor, the second switch terminal of the relay is connected with the source of the charge transistor, the first power supply terminal of the relay is connected with the cathode of the diode and the output terminal of the second self-locking unit respectively, the second power supply terminal of the relay is connected with the anode of the diode, and the first input terminal and the second input terminal of the second self-locking unit are connected with the control unit.

9. The power cell of claim 7, wherein, The high-power circuit further comprises a substrate, the transistor of the transistor branch is mounted on the substrate, and the relay of the relay branch is arranged across the transistor of the transistor branch.

10. An electronic device, comprising: The electronic device comprises the power battery according to any one of claims 7 to 9.

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