A battery, an electrical device, and an electrical device circuit system

Abstract

The present invention relates to the field of batteries, and provides a battery, an electric device, and an electric device circuit system. A battery comprises a positive electrode (P+) and a first negative electrode (P‑), and also comprises a second negative electrode (L‑) and a power management module (1), wherein the power management module (1) comprises a switch device electrically connected between the positive electrode (P+), the first negative electrode (P‑), and the second negative electrode (L‑). The battery can be charged by an external electrical appliance, and a generator of an electric device can be used to charge the battery.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and more specifically, to a battery, an electrical device, and an electrical device circuit system. Background Art

[0002] With the increase in the number of electrical appliances loaded on electrical devices, the requirements for the batteries of electrical devices are also getting higher and higher. At the same time, loading multiple batteries has become a demand and has been widely applied.

[0003] For other batteries loaded simultaneously, they may be divided into different functions. For example, for a vehicle, an additional battery is used for power supply for an in-vehicle air conditioner (also known as a parking air conditioner), etc. In this way, even during the process of the vehicle stopping and starting, the use of the in-vehicle air conditioner can be ensured. Such a scenario is particularly suitable for vehicles such as trucks because truck drivers often need to directly park and rest in the vehicle. At this time, using a dedicated vehicle-mounted battery to supply power to the in-vehicle air conditioner is better.

[0004] When multiple different batteries are loaded on an electrical device (such as a vehicle), the batteries themselves will encounter problems that need to be solved, and the design of the entire power supply system of the electrical device has also become a demand. If the design is improper, a series of problems will be caused. Summary of the Invention

[0005] The technical problem solved by the present invention is to provide a new battery, an electrical device, and an electrical device circuit system to meet the usage requirements of more electrical devices.

[0006] To solve the above problems, the present invention provides a battery, including a positive electrode and a first negative electrode, further including a second negative electrode and a power management module. The power management module includes a switching device electrically connected between the positive electrode, the first negative electrode, and the second negative electrode.

[0007] As a further improvement, the power management module includes:

[0008] A first circuit, which includes at least one battery management chip and is connected between the positive electrode and the second negative electrode;

[0009] A second circuit, one end of which is connected to the first circuit, and the other end is used to be respectively connected to each battery of an internal battery pack for cooperating to achieve the balance of each battery;

[0010] A third circuit, which is connected between the first negative electrode, the second negative electrode, the first circuit, and the second circuit. The third circuit is used for controlling the on and off of the paths between the first negative electrode and the second negative electrode during charging and the charging process. The switching device is located in the third circuit.

[0011] As a further improvement, the third circuit includes:

[0012] A first switch module connected between the first circuit and the first negative electrode;

[0013] A second switch module connected between the first switch module and the second circuit;

[0014] A third switch module connected between the first switch module, the second switch module and the second negative electrode.

[0015] As a further improvement, the third switch module includes three parallel-connected switch devices.

[0016] As a further improvement, the switch device is an enhancement-mode NMOS transistor.

[0017] To solve the above problems, the present invention also provides an electrical device equipped with the battery as described above.

[0018] To solve the above problems, the present invention also provides an electrical device circuit system, which includes a generator, a motor, a load, and a vehicle-mounted battery, and also includes the battery as described above. The generator is connected across the vehicle-mounted battery, the motor is connected to the generator across the vehicle-mounted battery, and the load is connected between the positive electrode and the second negative electrode; the positive electrode of the vehicle-mounted battery is connected to the positive electrode, and the positive electrode of the vehicle-mounted battery is connected to the first negative electrode.

[0019] As a further improvement, the electrical device is a vehicle, and an electrical device accessory power-on switch is connected in series between the positive electrode of the vehicle-mounted battery and the positive electrode.

[0020] As a further improvement, the electrical device is a vehicle, and an electrical device start switch is connected in series between the load and the positive electrode.

[0021] To solve the above problems, the present invention also provides another electrical device, which includes the electrical device circuit system as described above.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. A battery adopts a structure with two negative electrodes, and a power management module is connected between the two negative electrodes and the positive electrode, which not only realizes the separate power supply of the battery to external electrical appliances, greatly improving the practicability of the electrical device; the battery can also be connected to the electrical device circuit system to realize the charging of the battery by the generator of the electrical device;

[0024] 2. The power management module realizes the management of the charging and discharging of the battery pack through three major modules: the first circuit, the second circuit, and the third circuit, and also prevents the occurrence of overcharging and over-discharging of the battery pack.

[0025] 3. Connect the battery to the electrical equipment circuit system, and control the main circuit through different gear switches. This not only makes the electrical control logic clear but also facilitates the troubleshooting of problems in case of later failures. Brief Description of the Drawings

[0026] Figure 1 It is the schematic diagram of the electrical equipment circuit system provided by the embodiment of the present invention.

[0027] Figure 2 It is the schematic diagram of the power management module provided by the embodiment of the present invention.

[0028] Figure 3 It is the schematic diagram of the first circuit provided by the embodiment of the present invention.

[0029] Figure 4 It is the schematic diagram of the second circuit provided by the embodiment of the present invention.

[0030] Figure 5 It is the schematic diagram of the third circuit provided by the embodiment of the present invention.

[0031] Figure 6 It is the schematic diagram of the first part of the electrical equipment battery circuit provided by the embodiment of the present invention.

[0032] Figure 7 It is the schematic diagram of the second part of the electrical equipment battery circuit provided by the embodiment of the present invention.

[0033] Figure 8 It is the battery structure diagram provided by the embodiment of the present invention.

[0034] In the figure: 1. Power management module 11. First circuit 12. Second circuit

[0035] 13. Third circuit 131. First switch module 132. Second switch module

[0036] 133. Third switch module 2. Box body 3. Battery switch Detailed Embodiment

[0037] The electrical equipment in this embodiment can be machines in factories, vehicles, and means of transportation such as ships and airplanes. The following embodiments will be described in detail with vehicles as the specific electrical equipment.

[0038] When a vehicle is loaded with multiple different batteries, since each battery needs to be charged by the vehicle generator during operation, the positive pole of each battery is usually connected to the positive end of the vehicle generator, and the negative pole of each battery is usually connected to the negative end of the vehicle generator. However, this structure results in that when the vehicle generator stops running, the positive poles of each battery are connected to each other, and the negative poles are also connected to each other. At this time, the battery with a higher voltage will charge the battery with a lower voltage. This is the mutual charging phenomenon. The mutual charging phenomenon will occur repeatedly between different batteries, and the charging direction may be constantly changed. It will cause the internal storage of each battery to be continuously consumed in vain, reduce the voltage of each battery, and accelerate the loss of the battery. Therefore, avoiding mutual charging of batteries is very critical for vehicles with multiple batteries installed.

[0039] To this end, the present invention provides a new battery based on the design of the battery itself to overcome the above-mentioned battery mutual charging problem, and also provides a corresponding vehicle circuit system and a corresponding vehicle.

[0040] The technical solutions in the embodiments of the present invention are described clearly and completely below in conjunction with the accompanying drawings.

[0041] Reference Figure 1 As shown, a battery E1 provided by an embodiment of the present invention is shown.

[0042] A vehicle battery E1 includes a positive electrode P+ and a first negative electrode P-, and also includes a second negative electrode L- and a power management module 1. The power management module 1 includes a switching device (not distinguished by labeling) electrically connected between the positive electrode P+, ​​the first negative electrode P- and the second negative electrode L-.

[0043] Reference Figure 2 As shown, the power management module 1 includes: a first circuit 11, which includes at least one battery management chip, which is connected between the positive electrode P+ and the second negative electrode L-; a second circuit 12, one end of which is connected to the first circuit 11, and the other end is used to respectively connect the various batteries of the internal battery pack U, for cooperating to achieve the balance of the various batteries; a third circuit 13, which is connected between the first negative electrode P-, the second negative electrode L-, the first circuit 11 and the second circuit 12, the third circuit is used for charging and during the charging process, the passage and disconnection control of the first negative electrode P- and the second negative electrode L-, and the switching device is located in the third circuit 13.

[0044] Reference Figure 5As shown, the third circuit 13 includes: a first switch module 131 connected between the first circuit 11 and the first negative electrode P-; a second switch module 132 connected between the first switch module 131 and the second circuit 12; and a third switch module 133 connected between the first switch module 131, the second switch module 132 and the second negative electrode L-.

[0045] Referring to Figure 5 As shown, the third switch module 133 includes three of the switch devices connected in parallel.

[0046] Referring to Figure 5 As shown, the switch device is an enhancement-mode NMOS transistor.

[0047] Referring to Figure 8 As shown, a vehicle battery E1 includes: a box body 2; a first negative electrode P-, a second negative electrode L-, a positive electrode P+ and a battery switch 3 provided on the box body 2. The positive electrode P+, the first negative electrode P-, the second negative electrode L- and the power management module 1 are all located within the same box body 2. For other structures in the vehicle battery of this embodiment, reference may be made to the corresponding content of the foregoing embodiments.

[0048] Although not shown in the figure, however, each vehicle battery provided in the foregoing embodiments of the present invention can also be directly installed in a vehicle as the original vehicle battery to form a vehicle, a vehicle equipped with a vehicle battery E1 as described in any one of the above. In such a vehicle, the vehicle battery E1 provided in the foregoing embodiments can be used as a vehicle battery to supply power to each electrical device on the vehicle, and the vehicle battery has two negative electrodes (a first negative electrode and a second negative electrode).

[0049] Referring to Figure 1 As shown, a vehicle circuit includes a generator M1, a motor M2, a load M3 and a vehicle-mounted battery E2, and further includes the foregoing vehicle battery E1. The generator M1 is connected across the vehicle-mounted battery E2. The motor M2 and the generator M1 are connected to the vehicle-mounted battery E2. The load M3 is connected between the positive electrode P+ and the second negative electrode L-. The positive electrode of the vehicle-mounted battery E2 is connected to the positive electrode P+, and the positive electrode of the vehicle-mounted battery E2 is connected to the first negative electrode P-.

[0050] Referring to Figure 1 As shown, a vehicle accessory power-on gear switch ACC of a vehicle starting system is connected in series between the positive electrode of the vehicle-mounted battery E2 and the positive electrode P+.

[0051] Referring to Figure 1 As shown, a vehicle starting gear switch START of a vehicle starting system is connected in series between the load M2 and the positive electrode P+.

[0052] A vehicle, including the vehicle circuit as described above.

[0053] Refer to Figures 1 to 7 As shown, when the motor M2 charges the vehicle battery E1, there is a voltage difference between Va and Vb. According to Figure 6 As shown, the operation circuit outputs signals Gc1 and Gc2. According to Figure 5 As shown, the enhanced NMOS transistor for obtaining the signal is turned on, that is, the motor M2 can charge the vehicle battery E1 by connecting the positive electrode P+ and the first negative electrode P-.

[0054] The working principles of a vehicle battery, a vehicle, and a vehicle circuit provided by the present invention are as follows:

[0055] When the vehicle is turned off and the vehicle key stops at the LOCK gear (vehicle locking gear) position, the internal battery pack U supplies power to the load M3, that is, the vehicle battery E1 charges the load M3 through the positive electrode P+ and the second negative electrode L-. Since the load M3 is an in-vehicle refrigerator or an in-vehicle air conditioner with a switch, the working state of the load M3 is not affected by the working state of the vehicle. And at this time, the vehicle accessory power-on switch ACC is disconnected, that is, the positive poles between the vehicle-mounted battery E2 and the vehicle battery E1 are disconnected from each other to prevent the mutual charging phenomenon between the vehicle-mounted battery E2 and the vehicle battery E1.

[0056] When the vehicle key stops at the ACC gear (vehicle accessory power-on gear) position, the vehicle accessory power-on switch ACC is closed;

[0057] When the vehicle key is rotated from the ON gear (vehicle on gear) to the START gear (vehicle start gear) position, the vehicle accessory power-on switch ACC is closed, the vehicle on switch ON is closed, the vehicle start switch START is closed, the motor M2 is connected to the vehicle-mounted battery E2, the motor M2 starts, until the engine ignites successfully, and the generator M1 starts to operate;

[0058] Release the vehicle key, and the vehicle key returns from the START gear (vehicle start gear) to the ON gear (vehicle on gear). At this time, the vehicle accessory power-on switch ACC is closed, the vehicle on switch ON is closed, and the vehicle start switch START is disconnected. The generator M1 charges the vehicle-mounted battery E2 and the vehicle battery E1.

[0059] Although not shown in the figure, however, using the vehicle circuit system of the present invention Figure 1 As shown, it can be set on the corresponding vehicle, especially suitable for large vehicles such as trucks. At this time, the vehicle is a vehicle with a corresponding vehicle circuit system, and the vehicle battery E1 on the vehicle can be applied to vehicle user devices such as air conditioners, refrigerators, or induction cookers in the cab of a truck.

[0060] Referring to Figure 4 As shown, each battery in the battery pack is connected to a battery balancing circuit. The battery balancing circuit includes three parallel resistors, as well as a MOS transistor, a triode, and another resistor. The setting of the battery balancing circuit realizes the unified management of the batteries by the power management chip, preventing overcharging, over-discharging, and over-current of the batteries.

[0061] Referring to Figure 5 As shown, MOS transistors M12, M20, and M32 are in parallel and controlled by signal Gc1; MOS transistors M11, M19, and M31 are in parallel and controlled by signal Gc2; MOS transistors M25, M23, and M24 are in parallel and controlled by signal DO; the aforementioned three groups of MOS transistors jointly control the charging and discharging of the battery. In the second switch module 132, there are multiple parallel sampling detection resistors Rse18, realizing the judgment of the charging and discharging states of the battery by the power management chip;

[0062] Referring to Figures 2 to 5 As shown, DO is the discharge control, and CO is the charge control, which are used to control the corresponding two groups of enhancement-type NMOS transistors respectively. The two power management chips are in a cascaded relationship. The prior art does not have the function of preventing reverse charging, and the function of preventing reverse charging can be realized through the circuit. When there is a charging current, the charging circuit is turned on, otherwise the charging circuit is disconnected. Our circuit can prevent the vehicle battery E1 from charging the in-vehicle battery E2. During charging, the current will pass through Vb and Va, and will not pass through during discharging.

[0063] The beneficial effects of the present invention are as follows:

[0064] 1. A battery adopts a double negative electrode structure, and a power management module is connected between the double negative electrode and the positive electrode, which not only realizes the separate power supply of the battery to the external electrical appliance, greatly improving the practicability of the electrical equipment; the battery can also be connected to the electrical equipment circuit system, realizing the charging of the battery by the electrical equipment generator;

[0065] 2. The power management module realizes the management of the charging and discharging of the battery pack through the three major modules of the first circuit, the second circuit, and the third circuit, and also prevents the occurrence of overcharging and over-consuming of the battery pack;

[0066] 3. Connect the battery to the electrical equipment circuit system, and control the main circuit trunk line through different gear switches, which not only has clear electrical control logic, but also is convenient for troubleshooting problems in the later stage.

[0067] The working principle and working process of this embodiment and other contents can refer to the corresponding contents of the foregoing embodiments.

[0068] The same or similar parts among the above-mentioned embodiments in this specification can be referred to each other. Each embodiment focuses on the differences from other embodiments, but it does not limit that their differences cannot be mutually replaced or superimposed.

[0069] The above embodiments are only used to explain the technical solutions of the present invention rather than limit them. Those skilled in the art should understand that any modification and equivalent replacement without departing from the spirit and scope of the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A battery (E1), comprising a positive electrode (P+) and a first negative electrode (P-), characterized in that, it further includes a second negative electrode (L-) and a power management module (1), and the power management module (1) includes a switching device electrically connected between the positive electrode (P+), the first negative electrode (P-), and the second negative electrode (L-); the power management module (1) includes: a first circuit (11), which includes at least one battery management chip and is connected between the positive electrode (P+) and the second negative electrode (L-); a second circuit (12), one end of which is connected to the first circuit (11), and the other end is used to be respectively connected to each battery of an internal battery pack (U) for cooperating to achieve the balance of each battery; a third circuit (13), which is connected between the first negative electrode (P-), the second negative electrode (L-), the first circuit (11), and the second circuit (12), and the third circuit is used for controlling the on and off of the paths of the first negative electrode (P-) and the second negative electrode (L-) during the charging and discharging processes, and the switching device is located in the third circuit (13); wherein, a vehicle-mounted battery (E2) and a generator (M1) are connected in parallel between the positive electrode (P+) and the first negative electrode (P-), the positive electrode of the vehicle-mounted battery (E2) is connected to the positive electrode (P+), an electrical equipment accessory power-on switch (ACC) is connected in series between the positive electrode of the vehicle-mounted battery (E2) and the positive electrode (P+), and a load (M3) is connected between the positive electrode (P+) and the second negative electrode (L-).

2. A battery according to claim 1, characterized in that, the third circuit (13) includes: a first switch module (131) connected between the first circuit (11) and the first negative electrode (P-); a second switch module (132) connected between the first switch module (131) and the second circuit (12); a third switch module (133) connected between the first switch module (131), the second switch module (132), and the second negative electrode (L-).

3. A battery according to claim 2, characterized in that, the third switch module (133) includes three parallel-connected switching devices.

4. A battery according to claim 3, characterized in that, the switching device is an enhancement-mode NMOS transistor.

5. An electrical equipment, characterized in that, it is installed with a battery (E1) according to any one of claims 1 to 4.

6. An electrical equipment circuit system, including a generator (M1), a motor (M2), a load (M3), and a vehicle-mounted battery (E2), characterized in that, It further includes a battery (E1) as described in any one of claims 1 to 4. The generator (M1) is connected across the two ends of the vehicle-mounted battery (E2). The motor (M2) and the generator (M1) are connected to the vehicle-mounted battery (E2). The load (M3) is connected between the positive electrode (P+) and the second negative electrode (L-). The positive electrode of the vehicle-mounted battery (E2) is connected to the positive electrode (P+), and the negative electrode of the vehicle-mounted battery (E2) is connected to the first negative electrode (P-).

7. An electrical equipment circuit system according to claim 6, characterized in that, the electrical equipment is a vehicle, and a start switch (START) of the electrical equipment is connected in series between the motor (M2) and the positive electrode (P+).

8. An electrical equipment, characterized in that, it includes the electrical equipment circuit system as described in claim 7.

Images