Battery major loop switch and power supply

Abstract

The utility model is suitable for the technical field of batteries, and provides a battery major loop switch and a power supply. The battery main loop switch comprises a first switch, a second switch, a third switch, a first diode and a second diode; the first end of the first switch, the first end of the second switch and the anode of the first switch tube are connected together to serve as the first end of the battery main loop switch, and the second end of the first switch, the first end of the third switch and the anode of the second diode are connected together to serve as the second end of the battery main loop switch. The second end of the second switch, the second end of the third switch, the cathode of the first diode and the cathode of the second diode are connected together. The battery main loop switch provided by the utility model only comprises the first switch, the second switch, the third switch, the first diode and the second diode, and compared with an existing battery main loop switch, the battery main loop switch provided by the utility model has the advantage that the cost of the battery main loop switch is reduced.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and in particular relates to a battery main circuit switch and power supply. Background Art

[0002] The battery main circuit switch is an important execution unit in the battery management system. When the battery main circuit switch is used in the starting battery, since the starting battery will output a large current when starting, which can reach several hundred amperes (A), after the starting battery completes the starting action, the starting battery will enter the standby state. When the starting battery is in the standby state, the running current is small, usually only tens of amperes. Therefore, the battery main circuit switch needs to realize the function of loading a large current in a short time and stably loading a small current for a long time.

[0003] In order to satisfy the functions of loading a large current in a short time and stably loading a small current for a long time, the existing battery main circuit switch uses more components, so the cost of the existing battery main circuit switch is relatively high. Summary of the invention

[0004] In view of this, an embodiment of the present application provides a battery main circuit switch and a power supply to solve the technical problem of high cost of the existing battery main circuit switch.

[0005] In a first aspect, an embodiment of the present application provides a battery main circuit switch, the battery main circuit switch comprising a first switch, a second switch, a third switch, a first diode and a second diode;

[0006] The first end of the first switch, the first end of the second switch and the anode of the first switch tube are connected together as the first end of the battery main circuit switch, the second end of the first switch, the first end of the third switch and the anode of the second diode are connected together as the second end of the battery main circuit switch, and the second end of the second switch, the second end of the third switch, the cathode of the first diode and the cathode of the second diode are connected together.

[0007] Optionally, the battery main circuit switch further includes a controller; the controller is connected to the controlled end of the first switch, the controlled end of the second switch, and the controlled end of the third switch.

[0008] Optionally, one end of the battery main circuit switch is connected to the battery.

[0009] Optionally, the second switch and the first diode are integrated in a first device.

[0010] Optionally, the third switch and the second diode are integrated in a second device.

[0011] Optionally, the capacities of the first switch, the second switch and the third switch are different.

[0012] Optionally, the first switch, the second switch and the third switch are of different types.

[0013] Optionally, types of the first switch, the second switch and the third switch include relays, field effect transistors, bipolar junction transistors, insulated gate bipolar transistors and silicon controlled rectifiers.

[0014] In a second aspect, an embodiment of the present application provides a power supply, comprising a battery main circuit switch and a battery as described in any one of the first aspects.

[0015] Optionally, the battery main circuit switch is connected to the positive electrode or negative electrode of the battery.

[0016] The battery main circuit switch and power supply provided by the embodiments of the present application have the following technical effects:

[0017] The embodiment of the present application provides a battery main circuit switch, which includes a first switch, a second switch, a third switch, a first diode and a second diode; wherein the first end of the first switch, the first end of the second switch and the anode of the first switch tube are connected together as the first end of the battery main circuit switch, the second end of the first switch, the first end of the third switch and the anode of the second diode are connected together as the second end of the battery main circuit switch, and the second end of the second switch, the second end of the third switch, the cathode of the first diode and the cathode of the second diode are connected together. Since the embodiment of the present application provides a battery main circuit switch that only includes the first switch, the second switch, the third switch, the first diode and the second diode, compared with the existing battery main circuit switch, the battery main circuit switch provided by the present application reduces the cost of the battery main circuit switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A schematic structural diagram of a battery main circuit switch provided in an embodiment of the present application;

[0020] Figure 2 A schematic structural diagram of a battery main circuit switch provided in another embodiment of the present application;

[0021] Figure 3A schematic diagram of the structure of a power supply provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] It should be noted that the terms used in the embodiments of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. In the description of the embodiments of the present application, unless otherwise specified, "multiple" refers to two or more than two, and "at least one", "one or more" refers to one, two or more. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, it is defined that the "first" and "second" features can explicitly or implicitly include one or more of the features.

[0023] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0024] The embodiment of the present application first provides a battery main circuit switch.

[0025] See also Figure 1 , Figure 1 A schematic structural diagram of a battery main circuit switch provided in an embodiment of the present application.

[0026] like Figure 1 As shown, the battery main circuit switch 10 can be connected to the battery 20.

[0027] Specifically, one end of the battery main circuit switch 10 can be connected to the battery 20 .

[0028] Since the battery main circuit switch provided in the embodiment of the present application is symmetrical, any end of the battery main circuit switch 10 can be connected to the battery 20. For example, the first end of the battery main circuit switch 10 can be connected to the battery 20, and the second end of the battery main circuit switch 10 can also be connected to the battery 20.

[0029] Specifically, the battery main circuit switch 10 can be connected to the positive electrode of the battery 20 , or the battery main circuit switch 10 can be connected to the negative electrode of the battery 20 .

[0030] Thus, the first end of the battery main circuit switch 10 can be connected to the positive electrode of the battery 20, the first end of the battery main circuit switch 10 can be connected to the negative electrode of the battery 20, the second end of the battery main circuit switch 10 can be connected to the positive electrode of the battery 20, and the second end of the battery main circuit switch 10 can be connected to the negative electrode of the battery 20.

[0031] In practical applications, one end of the battery main circuit switch 10 can be connected to the cathode or anode of the battery 20 according to actual needs. As an example, Figure 1 A first end of the battery main circuit switch provided in is connected to the anode of the battery 20.

[0032] In practical applications, in some cases, two battery main circuit switches 10 may be used, one battery main circuit switch 10 is connected to the positive electrode of the battery, and the other battery main circuit switch 10 is connected to the negative electrode of the battery.

[0033] like Figure 1 As shown, the battery main circuit switch 10 may include a first switch L1, a second switch L2, a third switch L3, a first diode T1 and a second diode T2.

[0034] The first end of the first switch L1, the first end of the second switch L2 and the anode of the first diode T1 are connected together as the first end of the battery main circuit switch 10;

[0035] The second end of the first switch L1, the first end of the third switch L3 and the anode of the second diode T2 are connected together as the second end of the battery main circuit switch 10;

[0036] The second end of the second switch L2 , the second end of the third switch L3 , the cathode of the first diode T1 , and the cathode of the second diode T2 are connected in common.

[0037] It should be noted that the battery main circuit switch 10 may further include a controller (not shown).

[0038] The controller may be connected to a controlled end of the first switch L1. The controller may be connected to a controlled end of the second switch L2. The controller may be connected to a controlled end of the third switch L3.

[0039] The controller can be used to control the first switch L1 , the second switch L2 , and the third switch L3 .

[0040] Specifically, the controller may control the first switch L1 to be closed by sending a closing instruction to the controlled end of the first switch L1; the controller may control the first switch L1 to be opened by sending a disconnecting instruction to the controlled end of the first switch L1.

[0041] Specifically, the controller may control the second switch L2 to be closed by sending a closing instruction to the controlled end of the second switch L2; the controller may control the second switch L2 to be opened by sending a disconnecting instruction to the controlled end of the second switch L2.

[0042] Specifically, the controller may control the third switch L3 to be closed by sending a closing instruction to the controlled end of the third switch L3; the controller may control the third switch L3 to be opened by sending a disconnecting instruction to the controlled end of the third switch L3.

[0043] Among them, in order to meet the comprehensive requirements of the volume, weight, cost, overcurrent capacity, and precise charge and discharge control of the battery main circuit switch, the capacities of the first switch L1, the second switch L2, and the third switch L3 can be different. Of course, the capacities of the first switch L1, the second switch L2, and the third switch L3 can also be the same. In practical applications, the capacities of the first switch L1, the second switch L2, and the third switch L3 can be selected according to actual needs.

[0044] Among them, in order to meet the comprehensive requirements of the volume, weight, cost, overcurrent capacity, and precise charge and discharge control of the battery main circuit switch, the types of the first switch L1, the second switch L2, and the third switch L3 can be different. Of course, the types of the first switch L1, the second switch L2, and the third switch L3 can also be the same. In practical applications, the types of the first switch L1, the second switch L2, and the third switch L3 can be selected according to actual needs.

[0045] Among them, the types of the first switch L1, the second switch L2, and the third switch L3 may include but are not limited to relays, field effect transistors (FET), bipolar junction transistors (BJT), insulated gate bipolar transistors (IGBT), and silicon controlled rectifiers (SCR).

[0046] In order to meet the comprehensive requirements of the battery main circuit switch volume, weight, cost, overcurrent capacity, and precise charge and discharge control, the parameters and types of the first diode T1 and the second diode T2 can also be selected according to actual needs.

[0047] The types of the first diode T1 and the second diode T2 may include but are not limited to germanium diodes (Ge diodes) and silicon diodes (Si diodes).

[0048] In a possible implementation, the first diode T1 and the second diode T2 may be independent diodes, that is, the first diode T1 may be a diode independent of the second switch L2, and similarly, the second diode T2 may also be a diode independent of the third switch L3.

[0049] In another possible implementation, the first diode T1 and the second diode T2 may also be parasitic diodes, that is, the first diode T1 may be a diode parasitic on the second switch L2, and similarly, the second diode T2 may also be a diode parasitic on the third switch L3.

[0050] In another possible implementation, the first diode T1 and the second diode T2 may also be diodes integrated in the second switch L2 and the third switch L3, that is, the first diode T1 and the second switch L2 may be integrated in the first device, and similarly, the second diode T2 and the third switch L3 may be integrated in the second device.

[0051] The following combination Figure 1 , the working principle of the battery main circuit switch provided in the embodiment of the present application is described in detail.

[0052] In an embodiment of the present application, the first end of the battery main circuit switch can be connected to the positive electrode of the battery.

[0053] When the charging and discharging of the battery need to be controlled separately, the controller can send a disconnection instruction to the first switch L1 to control the first switch L1 to disconnect, the controller can send a closing instruction to the second switch L2 to control the second switch L2 to close, and the controller can send a closing instruction to the third switch L3 to control the third switch L3 to close.

[0054] At this time, the first switch L1 is in an open state, and the second switch L2 and the third switch L3 are both in a closed state. At this time, the controller can control the charging and discharging of the battery respectively.

[0055] Specifically, if it is necessary to allow the battery to be discharged but not to be charged, the controller can send a disconnection instruction to the second switch L2 to control the second switch L2 to be disconnected. At this time, only the third switch L3 is in a closed state. Since the charging current can neither pass through the cathode of the first diode T1 nor pass through the second switch L2 in the disconnected state, the function of not allowing the battery to be charged can be achieved in the above manner.

[0056] In addition, the current output by the battery can pass through the anode of the first diode T1, and after passing through the anode of the first diode T1, the current output by the battery can also pass through the third switch L3 in a closed state, and finally be transmitted to the load. Therefore, through the above method, the function of allowing the battery to be discharged but not allowed to be charged can be achieved.

[0057] Specifically, if it is necessary to allow charging of the battery but not to allow discharging of the battery, the controller may send a disconnection instruction to the third switch L3 to control the third switch L3 to be disconnected, and at this time only the second switch L2 is in a closed state.

[0058] Since the current output by the battery can neither pass through the cathode of the second diode T2 nor pass through the third switch L3 which is in the off state, the above method can achieve the function of not allowing the battery to discharge.

[0059] In addition, the charging current can pass through the anode of the second diode T2. After passing through the anode of the second diode T2, the charging current can also pass through the second switch L2 in a closed state and finally be transmitted to the battery. Therefore, through the above method, the function of allowing the battery to be charged but not allowed to be discharged can be achieved.

[0060] When the charging and discharging of the battery need to be controlled simultaneously, that is, the charging and discharging of the battery are allowed at the same time, or the charging and discharging of the battery are not allowed at the same time, the controller can send a closing instruction to the first switch L1 to control the first switch L1 to close, the controller can send an opening instruction to the second switch L2 to control the second switch L2 to open, and the controller can send an opening instruction to the third switch L3 to control the third switch L3 to open.

[0061] At this time, the first switch L1 is in a closed state, and the second switch L2 and the third switch L3 are both in an open state. At this time, the controller can control the charging and discharging of the battery at the same time.

[0062] Specifically, if it is necessary to allow the battery to be charged and discharged at the same time, the controller may not send a disconnection instruction to the first switch L1. At this time, the first switch L1 is still in a closed state. Since the charging current can pass through the first switch L1 in a closed state and finally be transmitted to the battery, the function of allowing the battery to be charged can be achieved in the above manner.

[0063] In addition, the current output by the battery can also be transmitted to the load through the first switch L1 in the closed state. Therefore, through the above method, the function of allowing the battery to be charged and discharged at the same time can be achieved.

[0064] Specifically, if it is necessary to prohibit both charging and discharging of the battery, the controller can send a disconnection instruction to the first switch L1 to control the first switch L1 to disconnect. Since the charging current cannot pass through the first switch L1 in the disconnected state, the charging current cannot be transmitted to the battery. Therefore, through the above method, the function of prohibiting charging of the battery can be achieved.

[0065] In addition, the current output by the battery cannot pass through the first switch L1 in the disconnected state, so the current output by the battery cannot be transmitted to the load. Therefore, through the above method, the function of not allowing charging and discharging of the battery at the same time can be achieved.

[0066] The battery main circuit switch provided in the embodiment of the present application can also be applied to a car starting battery, wherein the car starting battery can be a lithium-ion battery.

[0067] See also Figure 2 , Figure 2 A schematic structural diagram of a battery main circuit switch provided in another embodiment of the present application.

[0068] like Figure 2 As shown, the battery main circuit switch 20 can be connected to the positive electrode of the lithium-ion battery.

[0069] The battery main circuit switch 20 may include a relay K1 , a field effect transistor Q1 , and a field effect transistor Q2 .

[0070] The field effect transistor Q1 may be a metal oxide semiconductor field effect transistor (MOSFET), and the field effect transistor Q1 may further include a first parasitic diode.

[0071] The field effect transistor Q2 may be a MOSFET, and the field effect transistor Q2 may further include a second parasitic diode.

[0072] Among them, relay K1 is a large-capacity relay.

[0073] In addition, the battery main circuit switch 20 may also include a controller (not shown) respectively connected to the controlled end of the relay K1, the controlled end of the field effect transistor Q1 and the controlled end of the field effect transistor Q2, and the relay K1, the field effect transistor Q1 and the field effect transistor Q2 may be controlled by the controller.

[0074] Because when the car is started, the starting battery will output a large current, and after the starting battery completes the starting, the current when the starting battery is running is smaller.

[0075] Based on this, Figure 2The battery main circuit switch 20 provided in the corresponding embodiment is connected to the starting battery.

[0076] When the battery starts, the relay K1 can be controlled to close, and the field effect transistor Q1 and the field effect transistor Q2 can be controlled to open.

[0077] Based on this, when the starting battery is started, the large current required for starting the starting battery can be met by the large-capacity relay K1 which is in a closed state.

[0078] When the starting battery completes starting, the relay K1 can be controlled to be disconnected, and the field effect transistor Q1 and the field effect transistor Q2 can be controlled to be closed.

[0079] Based on this, the charging and discharging of the starting battery can be controlled respectively by the field effect transistor Q1 and the field effect transistor Q2.

[0080] It can be seen that through Figure 2 The battery main circuit switch 20 provided in the corresponding embodiment is connected to the starting battery, which can meet the working requirements of the starting battery.

[0081] It can be seen from the above that the embodiment of the present application provides a battery main circuit switch, which includes a first switch, a second switch, a third switch, a first diode and a second diode; wherein the first end of the first switch, the first end of the second switch and the anode of the first switch tube are connected together as the first end of the battery main circuit switch, the second end of the first switch, the first end of the third switch and the anode of the second diode are connected together as the second end of the battery main circuit switch, and the second end of the second switch, the second end of the third switch, the cathode of the first diode and the cathode of the second diode are connected together. Since the embodiment of the present application provides a battery main circuit switch that only includes the first switch, the second switch, the third switch, the first diode and the second diode, compared with the existing battery main circuit switch, the battery main circuit switch provided by the present application reduces the cost of the battery main circuit switch.

[0082] See also Figure 3 , Figure 3 A schematic diagram of a power supply structure provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the power supply 30 provided in the embodiment of the present application includes a battery main circuit switch 10 and a battery 20 .

[0083] The battery main circuit switch 10 is connected to the battery 20. Specifically, the battery main circuit switch 10 is connected to the positive electrode or the negative electrode of the battery 20.

[0084] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0085] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0086] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A battery main circuit switch, characterized in that: The battery main circuit switch includes a first switch, a second switch, a third switch, a first diode and a second diode; The first end of the first switch, the first end of the second switch and the anode of the first switch tube are connected together as the first end of the battery main circuit switch, the second end of the first switch, the first end of the third switch and the anode of the second diode are connected together as the second end of the battery main circuit switch, and the second end of the second switch, the second end of the third switch, the cathode of the first diode and the cathode of the second diode are connected together.

2. The battery main circuit switch according to claim 1, characterized in that: The battery main circuit switch further includes a controller; the controller is connected to the controlled end of the first switch, the controlled end of the second switch, and the controlled end of the third switch.

3. The battery main circuit switch according to claim 1, characterized in that: One end of the battery main circuit switch is connected to the battery.

4. The battery main circuit switch according to claim 1, characterized in that: The second switch and the first diode are integrated in a first device.

5. The battery main circuit switch according to claim 1, characterized in that: The third switch and the second diode are integrated in a second device.

6. The battery main circuit switch according to claim 1, characterized in that: The first switch, the second switch, and the third switch have different capacities.

7. The battery main circuit switch according to claim 1, characterized in that: The first switch, the second switch, and the third switch are of different types.

8. The battery main circuit switch according to claim 1, characterized in that: Types of the first switch, the second switch and the third switch include relays, field effect transistors, bipolar junction transistors, insulated gate bipolar transistors and silicon controlled rectifiers.

9. A power supply, characterized in that: It comprises a battery main circuit switch and a battery as described in any one of claims 1 to 8.

10. The power supply according to claim 9, characterized in that: The battery main circuit switch is connected to the positive electrode or the negative electrode of the battery.

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