Battery

Abstract

Disclosed in the present application is a battery. The battery comprises: a charging and discharging loop, a pre-charging branch, a charging and discharging limiting branch, and a storage battery, wherein the charging and discharging loop comprises a first switch and a second switch; the battery comprises a positive wiring terminal and a negative wiring terminal, a positive electrode of the storage battery is connected to the positive wiring terminal, and a negative electrode of the storage battery is connected to the negative wiring terminal; the first switch is arranged between the positive electrode of the storage battery and the positive wiring terminal; the second switch is arranged between the negative electrode of the storage battery and the negative wiring terminal; the pre-charging branch comprises a third switch, and is connected in parallel to the first switch; and the charging and discharging limiting branch comprises a fourth switch and a fifth switch, and is connected in parallel to the first switch. In the present application, an independent charging and discharging loop is arranged in the battery, such that an independent battery management system is formed in the battery, thereby realizing free expansion.

Description

A battery

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on August 10, 2023, with application number 202322144771.5 and patent application name “A Battery”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a battery. Background Art

[0004] Electrochemical energy storage has experienced rapid growth in recent years, with increasing market demand. Short-term power outages caused by energy storage system failures can severely impact user experience and economic benefits. Therefore, when designing an energy storage system, fault tolerance and scalability must be fully considered at every stage. Commercially available energy storage systems typically consist of an inverter and batteries, which are comprised of a battery management system and multiple cells.

[0005] Existing single batteries do not have a battery management system and have poor scalability. After expansion, the operation of a single battery has a significant impact on the operation of the entire energy storage system.

[0006] Summary of the Invention

[0007] The present application provides a battery to solve the technical problem that the existing single battery does not have a battery management system and cannot balance the internal voltage.

[0008] In order to solve the above technical problems, an embodiment of the present application provides a battery, comprising:

[0009] A charge and discharge circuit, a pre-charge branch, a charge and discharge limit branch, and a battery; wherein the charge and discharge circuit includes a first switch and a second switch;

[0010] The battery includes a positive terminal and a negative terminal, the positive terminal of the battery is connected to the positive terminal, and the negative terminal of the battery is connected to the negative terminal; the first switch is provided between the positive terminal of the battery and the positive terminal; the second switch is provided between the negative terminal of the battery and the negative terminal;

[0011] The pre-charging branch includes a third switch, and the pre-charging branch is arranged in parallel with the first switch;

[0012] The charge and discharge limiting branch includes a fourth switch and a fifth switch, and the charge and discharge limiting branch is arranged in parallel with the first switch.

[0013] The present application forms an independent battery management system inside the battery by setting an independent charge and discharge circuit, a pre-charge branch, and a charge and discharge limiting branch. By controlling the switches in each circuit, the disconnection and closure of each circuit and branch are controlled, thereby controlling the voltage balance during charge and discharge. The charge and discharge circuit is controlled by controlling the first switch and the second switch to control the connection and closure of the battery and the external battery; the battery can be combined with other batteries through the positive terminal and the negative terminal to achieve free expansion. At the same time, by limiting the charge and discharge circuit, the charge and discharge of the battery is controlled to avoid the voltage difference being too large and the current flowing back to damage the battery due to the instability of the external equipment during charge and discharge, so that the voltage end can be kept stable during charge and discharge and the internal voltage can be balanced. At the same time, by adjusting the disconnection and closure of the third switch to control the pre-charge branch, the current in the battery is adjusted so that the internal current of the battery can be controlled to avoid excessive charging current.

[0014] Furthermore, the limiting charge and discharge branch includes a limiting charge branch and a limiting discharge branch; the limiting charge branch and the limiting discharge branch are arranged in parallel.

[0015] Furthermore, the charging limiting branch includes a first diode, and the anode of the first diode is connected to the positive electrode of the battery.

[0016] Furthermore, the first diode and the fourth switch are arranged in series between the positive electrode of the battery and the positive electrode terminal.

[0017] Furthermore, the discharge limiting branch includes a second diode, and the cathode of the second diode is connected to the positive electrode of the battery.

[0018] Furthermore, the second diode and the fifth switch are arranged in series between the positive electrode of the battery and the positive electrode terminal.

[0019] This application controls the charge and discharge inside the battery by setting a limited charging branch and a limited discharge circuit, thereby regulating the internal voltage of the battery.

[0020] Furthermore, the pre-charging branch includes a pre-charging resistor; the pre-charging resistor and the third switch are arranged in series between the positive electrode of the battery and the positive electrode terminal.

[0021] The present application provides a pre-charging group in the pre-charging branch so that the battery can control the current inside the battery through the pre-charging group.

[0022] Furthermore, the first switch, the second switch, the third switch, the fourth switch and the fifth switch are configured as relays.

[0023] This application automatically controls the battery circuit by setting each switch as a relay. When the external input current is too large or too small, the circuit current is automatically adjusted and the circuit is converted to protect the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is an electrical diagram of a battery provided in an embodiment of the present application;

[0025] FIG2 is another electrical diagram of a battery provided in an embodiment of the present application.

[0026] The accompanying drawings are explained as follows: 1. Charge and discharge circuit; 2. Pre-charge branch; 3. Limit charge and discharge branch; 4. Battery; 5. First switch; 6. Second switch; 7. Positive terminal; 8. Negative terminal; 9. Third switch; 10. Fourth switch; 11. Fifth switch; 12. First diode; 13. Second diode; 14. Pre-charge resistor. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0028] Example 1

[0029] Please refer to FIG1 , which is an electrical diagram of a battery provided in an embodiment of the present application, including:

[0030] A charge and discharge circuit 1, a pre-charge branch 2, a charge and discharge limit branch 3, and a battery 4; wherein the charge and discharge circuit 1 includes a first switch 5 and a second switch 6;

[0031] The battery includes a positive terminal 7 and a negative terminal 8. The positive electrode of the battery 4 is connected to the positive terminal 7, and the negative electrode of the battery 4 is connected to the negative terminal 8. The first switch 55 is provided between the positive electrode of the battery 4 and the positive terminal 7. The second switch 6 is provided between the negative electrode of the battery 4 and the negative terminal 8.

[0032] The pre-filling branch 2 includes a third switch 9, and the pre-filling branch 2 is arranged in parallel with the first switch 5;

[0033] The charge and discharge limiting branch 3 includes a fourth switch 10 and a fifth switch 11 , and the charge and discharge limiting branch 3 is arranged in parallel with the first switch 5 .

[0034] In this embodiment, in the charge-discharge circuit 1, the positive electrode of the battery 4 is connected to the positive terminal 7, and the negative electrode of the battery 4 is connected to the negative terminal 8. During expansion, the battery's positive and negative terminals 7 and 8 are connected to the remaining batteries, and the connection between the battery and the remaining batteries is controlled by the first switch 5 and the second switch 6, thereby enabling flexible expansion. Furthermore, since the expanded energy storage system has an independent internal battery management system, the failure of a single battery does not affect the operation of the remaining batteries.

[0035] In this embodiment, the first switch 5 and the second switch 6 also serve as a circuit protection module to prevent the battery from being affected or harmed by excessive or insufficient input current from the external power supply. By configuring the circuit protection module as two switches, the first switch 5, the second switch 6, the battery 4, and the battery's positive and negative terminals 7 and 8 form a charge-discharge circuit 1. By using simple switches to maintain stable charge and discharge current within the battery, the battery circuit remains as simple and cost-effective as possible, improving practicality.

[0036] In this embodiment, the first switch 5 and the second switch 6 are configured as relays.

[0037] In this embodiment, the circuit protection module is set as a relay, so that the battery circuit is automatically controlled. When the external input current is too large or too small, the circuit current is automatically adjusted and the circuit is converted to protect the circuit.

[0038] In this embodiment, the battery includes: a charge and discharge circuit 1, a pre-charge branch 2, a charge and discharge limiting branch 3 and a battery 4; wherein, the charge and discharge circuit 1 includes a first switch 5 and a second switch 6;

[0039] The battery includes a positive terminal 7 and a negative terminal 8, the positive electrode of the battery 4 is connected to the positive terminal 7, and the negative electrode of the battery 4 is connected to the negative terminal 8; the first switch 5 is provided between the positive electrode of the battery 4 and the positive terminal 7; the second switch 6 is provided between the negative electrode of the battery 4 and the negative terminal 8;

[0040] The pre-filling branch 2 includes a third switch 9, and the pre-filling branch 2 is arranged in parallel with the first switch 5;

[0041] The charge and discharge limiting branch 3 includes a fourth switch 10 and a fifth switch 11 , and the charge and discharge limiting branch 3 is arranged in parallel with the first switch 5 .

[0042] In this embodiment, the charge and discharge limiting branch 3 includes a charge limiting branch and a discharge limiting branch; the charge limiting branch and the discharge limiting branch are arranged in parallel.

[0043] In this embodiment, the charging limiting branch includes a first diode 12 , and the anode of the first diode 12 is connected to the positive electrode of the battery 4 .

[0044] In this embodiment, the first diode 12 and the fourth switch 10 are connected in series between the positive electrode of the battery 4 and the positive electrode terminal 7 .

[0045] In this embodiment, the fourth switch 10 is provided between the battery 4 and the first diode 12 or between the positive terminal 7 and the first diode 12 .

[0046] In this embodiment, by providing a first diode 12 in the limiting charging branch, during the charge-to-discharge process, the limiting charging branch is connected via the fourth switch 10 to control the current flow in the battery, thereby avoiding current backflow caused by excessive voltage difference during the charge-to-discharge process, thereby achieving non-inductive switching of the battery from charge to discharge.

[0047] In this embodiment, the discharge limiting branch includes a second diode 13 , and the cathode of the second diode 13 is connected to the anode of the battery 4 .

[0048] In this embodiment, the second diode 13 and the fifth switch 11 are connected in series between the positive electrode of the battery 4 and the positive electrode terminal 7 .

[0049] In this embodiment, the fifth switch 11 is provided between the battery 4 and the second diode 13 or between the positive terminal 7 and the second diode 13 .

[0050] In this embodiment, by providing a second diode 13 in the limiting charge branch, during the discharge-to-charge process, the limiting discharge branch is connected via the fifth switch 11 to control the current flow in the battery, thereby avoiding current backflow caused by excessive voltage difference during the discharge-to-charge process, thereby achieving non-inductive switching of the battery from discharge to charge.

[0051] In this embodiment, by setting the charge and discharge limiting branch 3, the internal voltage in the battery can be self-regulated. By setting the first diode 12 and the second diode 13, the random and uncontrollable charging and discharging of the inverter is avoided, so that the terminal voltage of the battery can be kept stable during the charge and discharge conversion.

[0052] In this embodiment, the third switch 9 and the fourth switch 10 are configured as relays.

[0053] In this embodiment, by providing a third switch 9 and a fourth switch 10 in the charge and discharge limiting branch 3, and the third switch 9 and the fourth switch 10 are relays, the charge and discharge limiting branch 3 can be automatically controlled. When the terminal voltage is too large or too small, the charge and discharge limiting branch 3 is automatically opened to adjust the path of the forward diode and the reverse diode, so that the battery can automatically balance the internal voltage during the battery charge and discharge conversion and keep the terminal voltage stable.

[0054] In this embodiment, the battery includes: a charge and discharge circuit 1, a pre-charge branch 2, a charge and discharge limiting branch 3 and a battery 4; wherein, the charge and discharge circuit 1 includes a first switch 5 and a second switch 6;

[0055] The battery includes a positive terminal 7 and a negative terminal 8, the positive electrode of the battery 4 is connected to the positive terminal 7, and the negative electrode of the battery 4 is connected to the negative terminal 8; the first switch 5 is provided between the positive electrode of the battery 4 and the positive terminal 7; the second switch 6 is provided between the negative electrode of the battery 4 and the negative terminal 8;

[0056] The pre-filling branch 2 includes a third switch 9, and the pre-filling branch 2 is arranged in parallel with the first switch 5;

[0057] The charge and discharge limiting branch 3 includes a fourth switch 10 and a fifth switch 11 , and the charge and discharge limiting branch 3 is arranged in parallel with the first switch 5 .

[0058] In this embodiment, the pre-charging branch 2 includes a pre-charging resistor 14 ; the pre-charging resistor 14 and the third switch 9 are connected in series between the positive electrode of the battery 4 and the positive electrode terminal 7 .

[0059] In this embodiment, the pre-charging branch 2 includes a pre-charging resistor 14 and a third switch 9 , wherein the pre-charging resistor 14 is connected to the positive electrode of the battery 4 , and the third switch 9 is arranged between the pre-charging resistor 14 and the positive electrode of the battery 4 .

[0060] In another optional embodiment, the third switch 9 is provided between the pre-charging resistor 14 and the positive terminal 7 of the battery.

[0061] In this embodiment, the fifth switch 11 is configured as a relay.

[0062] In this embodiment, the provision of pre-charge branch 2 allows the battery to automatically control the internal current through pre-charge branch 2. When the external input current is too large, the fifth switch automatically opens the path of pre-charge branch 2 to charge the battery, preventing damage to the battery caused by excessive external input current. This achieves the effect of automatically regulating the internal current of the battery.

[0063] Please refer to FIG. 2 , which is another electrical diagram of a battery provided in an embodiment of the present application.

[0064] In this embodiment, the battery includes: a charge and discharge circuit 1, a pre-charge branch 2, a charge and discharge limiting branch 3 and a battery 4; wherein, the charge and discharge circuit 1 includes a first switch 5 and a second switch 6;

[0065] The battery includes a positive terminal 7 and a negative terminal 8, the positive electrode of the battery 4 is connected to the positive terminal 7, and the negative electrode of the battery 4 is connected to the negative terminal 8; the first switch 5 is provided between the positive electrode of the battery 4 and the positive terminal 7; the second switch 6 is provided between the negative electrode of the battery 4 and the negative terminal 8;

[0066] The pre-filling branch 2 includes a third switch 9, and the pre-filling branch 2 is arranged in parallel with the first switch 5;

[0067] The charge and discharge limiting branch 3 includes a fourth switch 10 and a fifth switch 11 , and the charge and discharge limiting branch 3 is arranged in parallel with the first switch 5 .

[0068] In this embodiment, the charge and discharge limiting branch 3 includes a charge limiting branch and a discharge limiting branch; the charge limiting branch and the discharge limiting branch are arranged in parallel.

[0069] In this embodiment, the charging limiting branch includes a first diode 12 , and the anode of the first diode 12 is connected to the positive electrode of the battery 4 .

[0070] In this embodiment, the first diode 12 and the fourth switch 10 are connected in series between the positive electrode of the battery 4 and the positive electrode terminal 7 .

[0071] In this embodiment, the discharge limiting branch includes a second diode 13 , and the cathode of the second diode 13 is connected to the anode of the battery 4 .

[0072] In this embodiment, the second diode 13 and the fifth switch 11 are connected in series between the positive electrode of the battery 4 and the positive electrode terminal 7 .

[0073] In this embodiment, the pre-charging branch 2 includes a pre-charging resistor 14 ; the pre-charging resistor 14 and the third switch 9 are connected in series.

[0074] In this embodiment, the first switch 5 , the second switch 6 , the third switch 9 , the fourth switch 10 and the fifth switch 11 are configured as relays.

[0075] In this embodiment, the battery specifically includes a storage battery 4, a pre-charge branch 2, a charge and discharge limiting branch 3, and a charge and discharge circuit 1. The charge and discharge circuit 1 includes a first switch 5 and a second switch 6. The first switch 5 is arranged between the positive electrode of the storage battery 4 and the positive terminal 7 of the battery, and the second switch 6 is arranged between the negative electrode of the storage battery 4 and the negative terminal 8 of the battery. The charge and discharge limiting branch 3 includes a third switch 9, a fourth switch 10, a first diode 12, and a second diode 13. The fourth switch 10 is arranged between the positive electrode of the storage battery 4 and the first diode 12, and the fifth switch 11 is arranged between the positive electrode of the storage battery 4 and the second diode 13. The pre-charge branch 2 includes a pre-charge resistor 14 and a fifth switch 11.

[0076] In this embodiment, an independent charge and discharge circuit 1, a pre-charge branch 2, and a charge and discharge limiting branch 3 are provided inside the battery, so that an independent battery management system is formed inside the battery. By controlling the switches in each circuit, the opening and closing of each circuit and branch are controlled, thereby controlling the voltage balance during charge and discharge. The charge and discharge circuit 1 is controlled by controlling the first switch 5 and the second switch 6 to control the connection and closing of the battery and the external battery; the battery can be combined with other batteries through the positive terminal 7 and the negative terminal 8 to achieve free expansion. At the same time, by limiting the charge and discharge circuit 1, the charge and discharge of the battery is controlled to avoid the voltage difference being too large and the current flowing back to damage the battery due to the instability of the external equipment during charge and discharge, so that the voltage end can be kept stable during charge and discharge and the internal voltage can be balanced. At the same time, by adjusting the opening and closing of the third switch 9 to control the pre-charge branch 2, the current in the battery is adjusted so that the internal current of the battery can be controlled to avoid excessive charging current.

[0077] The specific embodiments described above further illustrate the objectives, technical solutions, and beneficial effects of this application. It should be understood that the above descriptions are merely specific embodiments of this application and are not intended to limit the scope of protection of this application. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application by those skilled in the art should be included within the scope of protection of this application.

Claims

1. A battery, characterized in that: include: A charge and discharge circuit, a pre-charge branch, a charge and discharge limit branch and a storage battery; wherein the charge and discharge circuit comprises a first switch and a second switch; Wherein, the battery comprises a positive terminal and a negative terminal, the positive electrode of the battery is connected to the positive terminal, and the negative electrode of the battery is connected to the negative terminal; the first switch is arranged between the positive electrode of the battery and the positive terminal; the second switch is arranged between the negative electrode of the battery and the negative terminal; The pre-charging branch includes a third switch, and the pre-charging branch is arranged in parallel with the first switch; The charge and discharge limiting branch includes a fourth switch and a fifth switch, and the charge and discharge limiting branch is arranged in parallel with the first switch.

2. The battery according to claim 1, characterized in that The limiting charge and discharge branch includes a limiting charge branch and a limiting discharge branch; the limiting charge branch and the limiting discharge branch are arranged in parallel.

3. The battery according to claim 2, characterized in that The limiting charging branch includes a first diode, wherein an anode of the first diode is connected to a positive electrode of the battery.

4. The battery according to claim 3, characterized in that The first diode and the fourth switch are arranged in series between the positive electrode of the battery and the positive electrode terminal.

5. The battery according to claim 2, characterized in that The discharge limiting branch includes a second diode, a cathode of the second diode is connected to the anode of the battery.

6. The battery according to claim 5, characterized in that The second diode and the fifth switch are arranged in series between the positive electrode of the battery and the positive electrode terminal.

7. The battery according to claim 1, characterized in that The pre-charging branch includes a pre-charging resistor; the pre-charging resistor and the third switch are arranged in series between the positive electrode of the battery and the positive electrode terminal.

8. The battery according to claim 1, characterized in that The first switch, the second switch, the third switch, the fourth switch and the fifth switch are configured as relays.

Images