An energy storage charge and discharge controller with heating function

Abstract

The present invention discloses an energy storage charge and discharge controller with a heating function, comprising a charge and discharge controller ①, a battery heating switch circuit ② and a battery temperature measurement circuit ③, characterized in that: the charge and discharge control circuit ① is connected to a battery heating switch circuit ② and a battery temperature measurement circuit ③, the battery heating control circuit comprises a temperature sampling circuit ⑧ and a temperature measurement probe interface ⑨, the temperature measurement probe interface can be externally connected to a temperature probe; the battery heating switch circuit can be externally connected to a heating line. The advantages of the present invention are that it can overcome the disadvantages of the prior art, and the structural design is reasonable and novel.

Description

Technical Field

[0001] The invention relates to an energy storage charge and discharge controller, in particular to an energy storage charge and discharge controller with a heating function. Background Art

[0002] "Lithium battery" is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and non-aqueous electrolyte solution. With the development of science and technology, lithium batteries have now become mainstream. Lithium-ion batteries have been widely used in portable appliances such as laptops, cameras, and mobile communications due to their unique performance advantages. The large-capacity lithium-ion batteries developed have begun to be tested in electric vehicles and are expected to become one of the main power sources for electric vehicles in the 21st century. They will also be used in artificial satellites, aerospace, and energy storage. With the shortage of energy and the pressure of environmental protection in the world. Lithium batteries are widely used in the electric vehicle industry, especially the emergence of lithium iron phosphate and ternary material batteries, which has further promoted the development and application of the lithium battery industry. However, due to the chemical characteristics of lithium batteries, the charging and discharging efficiency, life, and safety of lithium batteries in low temperature environments have a significant impact. Summary of the invention

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide an energy storage charge and discharge controller with a heating function to prevent the lithium battery from affecting the working efficiency and service life in a low temperature environment.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is a storage energy charge and discharge controller with a heating function, comprising a charge and discharge controller (1) and a battery body (4), and also comprising a battery heating switch circuit (2) and a battery temperature measurement circuit (3), wherein the charge and discharge control circuit (1) is connected to the battery heating switch circuit (2) and the battery temperature measurement circuit (3), the battery temperature measurement circuit (3) comprises a temperature sampling circuit (8) and a temperature measurement probe interface (9), and the temperature measurement probe interface (9) is connected to a temperature probe (6); the battery heating switch circuit is connected to a heating wire (7), and the heating wire (7) is attached to the outside of the battery body (4).

[0005] The above energy storage charge and discharge controller with heating function is optimized, and the charge and discharge controller (1) includes an MCU, a power supply circuit, a charging circuit, a discharging circuit, a protection circuit, a detection sampling circuit, a status indication circuit, and a communication circuit. The power supply circuit, the charging circuit, the discharging circuit, the protection circuit, the detection sampling circuit, the status indication circuit, and the communication circuit are connected to the MCU.

[0006] Optimized, in the above energy storage charge and discharge controller with heating function, the battery heating switch circuit (2) and the battery temperature measurement circuit (3) are connected to the MCU.

[0007] Optimized, in the above-mentioned energy storage charge and discharge controller with heating function, the temperature measuring probe interface (9) comprises an output terminal 2 (24) and an output terminal 1 (23), the battery heating switch circuit (2) comprises an N-channel MOS tube (21), a diode (29), a second resistor (25), and a third resistor (26), the third resistor (26) being connected in series to the G pole of the N-channel MOS tube (21), the diode (29) being connected in series to the S pole of the N-channel MOS tube (21), the D pole of the N-channel MOS tube (21) being grounded, the two ends of the third resistor (26) being connected to the output terminal 1 (23) and the output terminal 2 (24) respectively, and the G pole of the N-channel MOS tube (21) being grounded through the third resistor (26).

[0008] Optimized, in the above energy storage charge and discharge controller with heating function, the cathode of the diode (29) is connected to the power supply voltage, and the resistor 2 (25) is connected in series between the G pole of the N-channel MOS tube (21) and the WARM EN terminal of the MCU.

[0009] Optimized, in the above energy storage charge and discharge controller with heating function, the output terminal 2 (24) and the output terminal 1 (23) are connected to the heating line (7).

[0010] Optimized, the above energy storage charge and discharge controller with heating function, the temperature probe (6) includes a thermistor seven (33), a thermistor nine (35), the battery temperature measurement circuit (3) includes a ceramic capacitor one (31), a ceramic capacitor two (32), a resistor eight (34), and a resistor ten (36), the ADC-NTC terminal of the MCU is connected to a 5V power supply through the thermistor seven (33), the resistor eight (34) and the ceramic capacitor one (31) are connected in parallel and then connected in series between the ADC-NTC terminal of the MCU and the ground terminal; the second ADC-NTC terminal of the MCU is connected to a 5V power supply through the thermistor nine (35), the resistor ten (36) and the ceramic capacitor two (32) are connected in parallel and then connected in series between the second ADC-NTC terminal of the MCU and the ground terminal.

[0011] In the technical solution of the present application, an external heating wire is arranged on the battery, and the ambient temperature of the battery is measured by a temperature measuring probe. When the ambient temperature of the battery is too low, the battery is heated by the external heating wire to maintain the temperature of the battery.

[0012] In the solution, the ambient temperature of the battery is measured for the three different working stages of the lithium battery, and the control switch circuit is realized to energize the heating wire to heat the battery pack to solve the impact of charging and discharging in low temperature environment on the life, function and safety of the battery pack. The most efficient energy-saving control is achieved by adjusting different temperature rise controls for the three different working stages of the battery pack: charging, discharging and resting (resting).

[0013] The working states of the battery pack in three different working stages, namely, charging, discharging, and resting (resting), can be realized by a charge and discharge controller (1). The charge and discharge controller (1) in the present application can be a general-purpose charge and discharge controller for rechargeable batteries used in the prior art. The above working state detection can be realized by it, and no further description is given here. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 It is a structural schematic diagram of a battery heating switch circuit of the present invention;

[0016] Figure 3 It is a structural schematic diagram of the temperature sampling circuit of the present invention;

[0017] Figure 4 It is a structural schematic diagram of the MCU connection circuit of the present invention. DETAILED DESCRIPTION

[0018] The technical features of the present invention are further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] Example 1

[0020] The present invention provides an energy storage charge and discharge controller with a heating function, comprising a charge and discharge controller (1) and a battery body (4), and also comprising a battery heating switch circuit (2) and a battery temperature measurement circuit (3); the charge and discharge control circuit (1) is connected to the battery heating switch circuit (2) and the battery temperature measurement circuit (3); the battery temperature measurement circuit (3) comprises a temperature sampling circuit (8) and a temperature measurement probe interface (9); the temperature measurement probe interface (9) is connected to a temperature probe (6); the battery heating switch circuit is connected to a heating wire (7), and the heating wire (7) is attached to the outside of the battery body (4).

[0021] The charge and discharge controller (1) comprises an MCU, a power supply circuit, a charging circuit, a discharging circuit, a protection circuit, a detection sampling circuit, a status indication circuit, and a communication circuit, wherein the power supply circuit, the charging circuit, the discharging circuit, the protection circuit, the detection sampling circuit, the status indication circuit, and the communication circuit are connected to the MCU.

[0022] The battery heating switch circuit (2) and the battery temperature measurement circuit (3) are connected to the MCU.

[0023] The temperature measuring probe interface (9) comprises a second output terminal (24) and an output terminal (23); the battery heating switch circuit (2) comprises an N-channel MOS tube (21), a diode (29), a second resistor (25), and a third resistor (26); the third resistor (26) is connected in series to the G pole of the N-channel MOS tube (21); the diode (29) is connected in series to the S pole of the N-channel MOS tube (21); the D pole of the N-channel MOS tube (21) is grounded; two ends of the third resistor (26) are respectively connected to the output terminal (23) and the output terminal (24); and the G pole of the N-channel MOS tube (21) is grounded through the third resistor (26).

[0024] The cathode of the diode (29) is connected to the power supply voltage, and the resistor 2 (25) is connected in series between the G pole of the N-channel MOS tube (21) and the WARM EN terminal of the MCU.

[0025] The output terminal 2 (24) and the output terminal 1 (23) are connected to the heating line (7).

[0026] The temperature probe (6) comprises a thermistor seven (33) and a thermistor nine (35); the battery temperature measurement circuit (3) comprises a ceramic capacitor one (31), a ceramic capacitor two (32), a resistor eight (34) and a resistor ten (36); the ADC-NTC terminal of the MCU is connected to a 5V power supply via the thermistor seven (33); the resistor eight (34) and the ceramic capacitor one (31) are connected in parallel and then connected in series between the ADC-NTC terminal of the MCU and a ground terminal; the second ADC-NTC terminal of the MCU is connected to a 5V power supply via the thermistor nine (35); the resistor ten (36) and the ceramic capacitor two (32) are connected in parallel and then connected in series between the second ADC-NTC terminal of the MCU and a ground terminal.

[0027] In the technical solution of the present application, thermistor seven (33) and thermistor nine (35) are used to measure the temperature of the battery and the temperature at the N-channel MOS tube (21) and transmit the electrical signal to the ADC-NTC terminal and the second ADC-NTC terminal of the MCU.

[0028] When the ambient temperature of the battery is too low, the MCU controls the heating line (7) to heat the battery to maintain the battery temperature.

[0029] In the solution, the ambient temperature of the battery is measured for the three different working stages of the lithium battery, and the control switch circuit is realized to energize the heating wire to heat the battery pack to solve the impact of charging and discharging in low temperature environment on the life, function and safety of the battery pack. The most efficient energy-saving control is achieved by adjusting different temperature rise controls for the three different working stages of the battery pack: charging, discharging and resting (resting).

[0030] In this application, the temperature at which the battery stops heating in the discharge state is adjusted to 10 degrees Celsius, the temperature at which the battery starts heating in the discharge state is adjusted to -15 degrees Celsius, the temperature at which the battery stops heating in the charging state is adjusted to 15 degrees Celsius, the temperature at which the battery starts heating in the charging state is adjusted to 5 degrees Celsius, the temperature at which the battery stops heating in the static state is set to -15 degrees Celsius, and the temperature at which the battery starts heating in the static state is adjusted to -30 degrees Celsius. The above parameters can be adjusted appropriately according to the capacity, output power and ambient temperature of use, and they are not fixed.

[0031] When the upper limit of the operating temperature of the N-channel MOS tube (21) reaches 79 degrees Celsius and the lower limit of the operating temperature reaches -40 degrees Celsius, the controller as a whole stops working.

[0032] By measuring the working temperature of the battery by thermistor seven (33) and thermistor nine (35) and detecting the working state of the battery by the charge and discharge controller (1), the working temperature of the battery pack in three different working stages, namely, charging, discharging and resting (resting), can be controlled.

[0033] The working states of the battery pack in three different working stages, namely, charging, discharging, and resting (resting), can be realized by a charge and discharge controller (1). The charge and discharge controller (1) in the present application can be a general-purpose charge and discharge controller for rechargeable batteries used in the prior art. The above working state detection can be realized by it, and no further description is given here.

[0034] Example 2

[0035] The difference between this embodiment and the first embodiment is that in the technical solution of this embodiment, the battery heating switch circuit (2) uses a D-type flip-flop switch circuit in the prior art to connect the MCU and the heating line (7) to realize the control of the working state of the heating line (7). The specific form and connection method of the D-type flip-flop switch circuit belong to the common knowledge in the art and will not be described in detail here.

[0036] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should fall within the protection scope of the present invention.

Claims

1. An energy storage charge and discharge controller with a heating function, comprising a charge and discharge controller (1) and a battery body (4), characterized in that: The battery heating switch circuit (2) and the battery temperature measurement circuit (3) are also included. The charge and discharge controller (1) is connected to the battery heating switch circuit (2) and the battery temperature measurement circuit (3). The battery temperature measurement circuit (3) includes a temperature sampling circuit (8) and a temperature measurement probe interface (9). The temperature measurement probe interface (9) is connected to a temperature probe (6). The battery heating switch circuit is connected to a heating wire (7). The heating wire (7) is attached to the outside of the battery body (4). The temperature measurement probe interface (9) includes an output terminal 2 (24) and an output terminal 1 (23). The battery heating switch circuit (2) includes an N-channel MOS tube (21), a diode (29), a resistor 2 (25), and a resistor 3 (26). The resistor 3 (26) is connected in parallel between the G pole of the N-channel MOS tube (21) and the D pole of the N-channel MOS tube (21). The diode (29) is connected in series between the output terminal 1 (23) and the output terminal 2 (24). The D pole of the N-channel MOS tube (21) is grounded. Both ends of the diode (29) are connected to the ground. The output terminal 1 (23) and the output terminal 2 (24) are connected respectively, the G pole of the N-channel MOS tube (21) is grounded through the resistor 3 (26), the cathode of the diode (29) is connected to the power supply voltage, the resistor 2 (25) is connected in series between the G pole of the N-channel MOS tube (21) and the WARMEN terminal of the MCU, the temperature probe (6) includes thermistor 7 (33), thermistor 9 (35), the battery temperature measurement circuit (3) includes ceramic capacitor 1 (31), ceramic capacitor 2 (32), resistor eight (34), resistor ten (36), the ADC-NTC terminal of the MCU is connected to a 5V power supply through thermistor seven (33), resistor eight (34) and ceramic capacitor one (31) are connected in parallel and then connected in series between the ADC-NTC terminal of the MCU and the ground terminal; the ADC-NTC2 terminal of the MCU is connected to a 5V power supply through thermistor nine (35), resistor ten (36) and ceramic capacitor two (32) are connected in parallel and then connected in series between the ADC-NTC2 terminal of the MCU and the ground terminal.

2. The energy storage charge and discharge controller with heating function according to claim 1 is characterized in that: The charge and discharge controller (1) comprises an MCU, a power supply circuit, a charging circuit, a discharging circuit, a protection circuit, a detection sampling circuit, a status indication circuit, and a communication circuit, wherein the power supply circuit, the charging circuit, the discharging circuit, the protection circuit, the detection sampling circuit, the status indication circuit, and the communication circuit are connected to the MCU.

3. The energy storage charge and discharge controller with heating function according to claim 2 is characterized in that: The battery heating switch circuit (2) and the battery temperature measurement circuit (3) are connected to the MCU.

4. The energy storage charge and discharge controller with heating function according to claim 1 is characterized in that: The output terminal 2 (24) and the output terminal 1 (23) are connected to the heating line (7).

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