A start-stop power supply
Patent Information
- Application Number
- CN202522166952.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-14
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-10-14
AI Technical Summary
[0002]现阶段，车载启停电源主要以铅酸电池为主，铅酸电池普遍存在放电倍率小、低温性能差、高温性能差、循环性能差等问题，且铅酸电池存在严重的重金属铅及添加剂镉污染问题，不符合绿色发展的理念，会逐渐退出市场领域；
本实用新型公开的启停电源，通过充电控制模块和放电控制模块，将充电回路和放电回路独立分开控制，在车辆点火起动时，电源组通过放电回路给起动机供电，起动后，发电机通过充电回路给电池组充电，当充电控制模块监测到温度低于设定阈值时，关闭温控开关进行断路，通过限流单元给电池组充电，从而避免低温大电流浮充工况下，对电池组的伤害，实现在全气候条件下工作的可行性，大幅提升冬季低温下电源系统的使用寿命。
Smart Images
Figure CN224804674U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle power systems, and in particular to a start-stop power supply. Background Technology
[0002] At present, vehicle start-stop power supplies are mainly lead-acid batteries. Lead-acid batteries generally have problems such as low discharge rate, poor low temperature performance, poor high temperature performance, and poor cycle performance. In addition, lead-acid batteries have serious pollution problems from heavy metal lead and additive cadmium, which do not conform to the concept of green development and will gradually be withdrawn from the market. Sodium-ion batteries have been rapidly adopted in the field of start-stop power supplies due to their advantages such as high discharge rate, good performance at high and low temperatures, long cycle life, and low cost. However, in winter when the temperature is low, due to their operating characteristics, there is a high-current float charging condition, which poses a great challenge to the battery. If not controlled, low-temperature charging will cause a significant decrease in battery cycle life, limiting the application of sodium batteries in low-temperature areas and making it difficult to meet market demand. Utility Model Content
[0003] In order to overcome the shortcomings of the prior art and solve the existing technical problems, this utility model discloses a start-stop power supply that can improve the service life of the power supply by changing the charging and discharging system.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: A start-stop power supply includes a power supply housing, with a positive terminal and a negative terminal outside the housing, and a battery pack connected to the positive and negative terminals via a circuit inside the housing, as well as a charging control module and a discharging control module for controlling the charging and discharging of the battery pack; the charging control module and the discharging control module are connected in parallel in the circuit between the battery pack and the positive terminal, and the charging control module includes a current limiting unit connected in parallel in the main circuit, and a temperature control switch for on / off control based on temperature changes.
[0005] Furthermore, the discharge control module is configured as a semiconductor device that conducts unidirectional current when the battery pack discharges, and its current carrying capacity is >200A.
[0006] Furthermore, the temperature threshold of the temperature control switch is set to 0-25°C. When the temperature is higher than the temperature threshold, the temperature control switch is turned on; when the temperature is lower than the temperature threshold, the temperature control switch is turned off.
[0007] Furthermore, the current limiting unit is configured as a resistive element, and the resistance value of the resistive element is in the range of 0.001 to 10Ω.
[0008] Furthermore, the current limiting unit is configured as a step-down element, consisting of diodes connected in series.
[0009] Furthermore, the battery pack is formed by connecting multiple individual battery cells in series and parallel.
[0010] By adopting the technical solution described above, this utility model has the following beneficial effects: The start-stop power supply disclosed in this utility model independently controls the charging circuit and the discharging circuit through a charging control module and a discharging control module. When the vehicle is ignited and started, the power supply provides power to the starter motor through the discharging circuit. After starting, the generator charges the battery pack through the charging circuit. When the charging control module detects that the temperature is lower than the set threshold, it closes the temperature control switch to disconnect the circuit and charges the battery pack through the current limiting unit. This avoids damage to the battery pack under low temperature and high current float charging conditions, realizes the feasibility of working under all climate conditions, and greatly improves the service life of the power system in low temperature winter conditions. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the implementation structure of this utility model.
[0012] In the diagram: 1. Power supply housing; 2. Positive terminal; 3. Negative terminal; 4. Battery pack; 5. Discharge control module; 6. Charging control module; 601. Temperature control switch; 602. Current limiting unit. Detailed Implementation
[0013] The technical solution of this utility model will be described below with reference to the accompanying drawings of the embodiments of this utility model. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this utility model for the convenience of describing this utility model, and do not indicate or imply that the device or element referred to must have a specific orientation.
[0014] Combined with appendix Figure 1The aforementioned start-stop power supply includes a power housing 1, with a positive terminal 2 and a negative terminal 3 fixedly mounted on its outer surface. Inside the power housing 1 is a battery pack 4 connected to the positive terminal 2 and the negative terminal 3 via a circuit, as well as a charging control module 6 and a discharging control module 5 for controlling the charging and discharging of the battery pack 4. Depending on the needs, the battery pack 4 is formed by multiple individual battery cells connected in series and parallel, specifically in a six-parallel, four-series configuration. That is, six individual battery cells are first connected in parallel to form a parallel group to increase capacity, and then four such parallel groups are connected in series to increase voltage. The charging control module 6 and the discharging control module 5 are connected in parallel in the circuit between the battery pack 4 and the positive terminal 2. As shown in the attached diagram, the negative terminal of the battery pack 4 is connected via a wire. The positive terminal of the battery pack 4 is connected to the negative terminal 3 via two branch wires. The charging control module 6 and the discharging control module 5 are connected in series on the two branch wires. The battery pack 4 is controlled to discharge externally by the discharging control module 5, and external charging is controlled to charge the battery pack 4 by the charging control module 6. In addition, the discharging control module 5 is a semiconductor device that conducts unidirectional current when the battery pack 4 is discharging, and the current carrying capacity is >200A. It can be made of high-power diodes, parallel diodes, or field-effect transistors (MOSFETs) to realize a unidirectional current channel. Specifically, it is composed of eight germanium diodes connected in parallel to ensure that the voltage drop is reduced when a large instantaneous current passes through, thus reducing the impact on the minimum starting voltage. The charging control module 6 includes a current limiting unit 602 connected in parallel on the main circuit, and a temperature control switch 601 that controls the on / off state according to temperature changes, as shown in the attached figure. After the current limiting unit 602 and the temperature control switch 601 are connected in parallel, they are then connected in series on the corresponding branch wires. The temperature threshold of the temperature control switch 601 is set to 0-25℃, specifically 10℃. When the temperature is higher than the temperature threshold, the temperature control switch 601 is turned on; when the temperature is lower than the temperature threshold, the temperature control switch 601 is turned off. The temperature control switch 601 uses a temperature acquisition device to trigger the MOSFET transistor to close and turn off to achieve the switching function. As needed, the current limiting unit 602 can be set as a resistive element, which can be a resistor or a heating film, etc. The resistance value of the resistive element is in the range of 0.001-10Ω, and generally 0.5-4Ω is selected. In addition, the current limiting unit 602 can also be set as a step-down element, which is composed of diodes connected in series. Specifically, silicon diodes are used to form a step-down element, and the number of diodes connected in series is 1-4.
[0015] Implementing the start-stop power supply described in this utility model, when the vehicle is ignited and started, the power supply group is controlled by the discharge control module 5 to supply power to the starter motor through the discharge circuit. After starting, the generator charges the battery pack 4 through the charging circuit under the control of the charging module. When the charging control module 6 detects that the temperature is lower than the set threshold, it closes the temperature control switch 601 to achieve circuit breaking, and charges the battery pack 4 through the current limiting unit 602, thereby avoiding damage to the battery pack 4 under the low temperature and high current float charging condition. When comparing the usage effect, the start-stop power supply of this utility model is used as the test group, and the traditional start-stop power supply is used as the control group. At the same time, it is placed in an environment of -10℃ for more than 12 hours to conduct a start-up micro-circulation test to simulate the vehicle working condition. The steps are as follows: pulse discharge 300A 4S, constant voltage 14.5V charging, cut-off current 0.5A, repeated for 10 cycles, and then the full charge and discharge capacity is calibrated. Comparing the low temperature start-up micro-circulation capacity retention rate data of the two groups of start-stop power supplies, the power supply performance of this application is significantly better than that of the traditional power supply.
[0016] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.
Claims
1. A start-stop power supply, comprising a power supply housing, a positive terminal and a negative terminal provided outside the power supply housing, a battery pack connected to the positive terminal and the negative terminal via a circuit inside the power supply housing, and a charging control module and a discharging control module for controlling the charging and discharging of the battery pack, characterized in that: The charging control module and the discharging control module are connected in parallel in the circuit between the battery pack and the positive terminal. The charging control module includes a current limiting unit connected in parallel in the main circuit, and a temperature control switch that controls the on / off state according to temperature changes.
2. The start / stop power supply according to claim 1, characterized in that: The discharge control module is a semiconductor device that conducts unidirectional current when the battery pack is discharging, and its current carrying capacity is greater than 200A.
3. The start / stop power supply according to claim 1, characterized in that: The temperature threshold of the temperature control switch is set to 0-25℃. When the temperature is higher than the temperature threshold, the temperature control switch is turned on; when the temperature is lower than the temperature threshold, the temperature control switch is turned off.
4. The start / stop power supply according to claim 1, characterized in that: The current limiting unit is configured as a resistive element, and the resistance value of the resistive element is in the range of 0.001 to 10Ω.
5. The start / stop power supply according to claim 1, characterized in that: The current limiting unit is configured as a step-down element, consisting of diodes connected in series.
6. The start / stop power supply according to claim 1, characterized in that: The battery pack is formed by connecting multiple individual battery cells in series and parallel.