Battery maintenance device

Abstract

The utility model discloses a battery maintenance device, wherein the discharge input terminal and the discharge output terminal of the over-discharge protection module are respectively connected to the positive terminal of the battery to be maintained and the first terminal of the discharge resistor, and the second terminal of the discharge resistor is connected to the negative terminal of the battery to be maintained, wherein the over-discharge protection module also includes a first switch and a control unit, wherein the first switch is used to control the discharge input terminal to be connected to the discharge resistor or to ground, so as to control the execution and stop of the discharge; the voltage sampling terminal of the control unit is connected to the discharge input terminal, and the over-discharge protection signal output terminal of the control unit is connected to the control terminal of the first switch, and when the voltage of the battery to be maintained reaches a preset threshold, the control unit outputs an over-discharge protection signal, automatically controls the first switch to switch the bias, and switches the discharge input terminal to ground. The battery maintenance device of the utility model can automatically stop discharging when the battery maintenance discharge meets the standard, which can effectively avoid the over-discharge problem and ensure the battery maintenance effect.

Description

Technical Field

[0001] The utility model relates to the technical field of battery maintenance, in particular to a battery maintenance device. Background Art

[0002] During the use of batteries, the active materials will gradually age. If they are not charged and discharged for a long time, the active materials will gradually lose their activity, and the performance and capacity of the battery will gradually decrease. Therefore, regular maintenance is required to charge, discharge and activate the batteries to restore the activity of the active materials and prevent sulfide failure caused by long-term storage or undercharging.

[0003] In the prior art, during battery maintenance, the discharge operation usually selects a suitable current limiting resistor according to the battery voltage to control the discharge current to ensure safety. In addition, during the discharge process, in order to avoid excessive discharge of the battery, it is usually necessary to use a multimeter to monitor the battery status in real time. When the discharge level reaches a threshold, the discharge is stopped manually.

[0004] However, real-time monitoring of the battery status requires frequent use of a multimeter to measure the battery voltage, which is time-consuming and labor-intensive. In addition, the battery voltage detection continuity during the operation is insufficient, and the over-discharge control accuracy is insufficient, making it difficult to avoid excessive discharge of the battery, resulting in the battery maintenance effect failing to achieve the expected effect. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a battery maintenance device to solve the problem in the prior art that battery maintenance is prone to over-discharge, resulting in maintenance effects that are not as good as expected.

[0006] The utility model provides a battery maintenance device, which includes: a discharge resistor and an over-discharge protection module, wherein the discharge input end of the over-discharge protection module is connected to the positive end of the battery to be maintained, the discharge output end of the over-discharge protection module is connected to the first end of the discharge resistor, and the second end of the discharge resistor is connected to the negative end of the battery to be maintained, wherein the over-discharge protection module further includes:

[0007] a first switch, wherein a common end of the first switch is connected to the discharge input end, a first active end of the first switch is connected to the discharge output end, and a second active end of the first switch is grounded;

[0008] A control unit, wherein a voltage sampling terminal of the control unit is connected to the discharge input terminal, and an over-discharge protection signal output terminal of the control unit is connected to the control terminal of the first switch.

[0009] Optionally, the over-discharge protection module further includes a power management unit, the input end of the power management unit is connected to the discharge input end, the power management unit includes a regulated voltage output end, and the regulated voltage output end is connected to the working power input end of the control unit.

[0010] Optionally, the control unit also includes: a protection threshold voltage setting switch, a digital tube, and a control chip connected to the protection threshold voltage setting switch and the digital tube and changing the reading of the digital tube when the protection threshold voltage setting switch is actuated or the voltage at the voltage sampling terminal changes.

[0011] Optionally, the control unit also includes a memory connected to the control chip.

[0012] Optionally, the first switch is a relay switch, a first end of a coil of the relay switch is connected to the regulated voltage output end, and the over-discharge protection module further includes:

[0013] a second transistor, wherein an input end of the second transistor is connected to a second end of the coil of the relay switch, an output end of the second transistor is grounded, and a control end of the second transistor is connected to the over-discharge protection signal output end;

[0014] A light emitting diode, wherein the anode of the light emitting diode is connected to the over-discharge protection signal output terminal, and the cathode of the light emitting diode is grounded.

[0015] Optionally, the over-discharge protection module further includes: a third diode, an anode and a cathode of the third diode are respectively connected to the second end and the first end of the coil of the relay switch.

[0016] Optionally, the over-discharge protection module also includes a first resistor and a second resistor connected in series between the second active end of the first switch and ground, and a buzzer, the input end of the buzzer is connected to the regulated voltage output end, the output end of the buzzer is grounded through a first transistor, and the control end of the first transistor is connected to the middle node between the first resistor and the second resistor.

[0017] Optionally, a first capacitor is connected in series between the control terminal of the first transistor and the ground.

[0018] Optionally, a mounting bracket is further included, the discharge resistor and the over-discharge protection module are fixedly arranged on the mounting bracket, and the over-discharge protection module is arranged at one end of the discharge resistor.

[0019] Optionally, the discharge resistor comprises a variable resistor, and both ends of the variable resistor are provided with binding posts.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] The battery maintenance device provided by the utility model includes a discharge resistor and an over-discharge protection module, wherein the discharge input end of the over-discharge protection module is connected to the positive end of the battery to be maintained, the discharge output end of the over-discharge protection module is connected to the first end of the discharge resistor, and the second end of the discharge resistor is connected to the negative end of the battery to be maintained, wherein the over-discharge protection module also includes a first switch and a control unit, wherein the common end of the first switch is connected to the discharge input end, and the first active end of the first switch is connected to the discharge output end. When the first switch is connected to the first active end, the connected battery to be maintained is connected in series with the discharge resistor to discharge, and the second active end of the first switch is grounded. When the battery to be maintained is switched to the second active end, the positive end of the battery to be maintained is grounded and the discharge stops; the voltage sampling end of the control unit is connected to the discharge input end, and the over-discharge protection signal output end of the control unit is connected to the control end of the first switch. When the voltage of the battery to be maintained reaches the preset threshold value, the discharge degree reaches the expected level, and the control unit outputs the over-discharge protection signal, automatically controls the first switch to be biased to the second active end, and can realize the automatic stop discharge control when the battery maintenance discharge reaches the standard, which can effectively avoid the over-discharge problem and ensure the battery maintenance effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the main module structure of the battery maintenance device according to an embodiment of the utility model;

[0023] Figure 2 It is a partial structural schematic diagram of an over-discharge protection module of a battery maintenance device according to an embodiment of the utility model;

[0024] Figure 3 A partial structural schematic diagram of a battery maintenance device according to an embodiment of the utility model;

[0025] Figure 4 It is a structural schematic diagram of a control unit of an over-discharge protection module of a battery maintenance device according to an embodiment of the utility model;

[0026] Figure 5 It is a structural schematic diagram of the power management unit of the over-discharge protection module of the battery maintenance device according to an embodiment of the utility model. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] In order to solve the problems in the prior art that battery maintenance relies on manual detection of battery voltage through a multimeter to control discharge cut-off, resulting in insufficient accuracy, difficulty in accurately controlling over-discharge problems, and difficulty in achieving expected maintenance effects, the utility model provides a battery maintenance device, which automatically monitors the battery voltage through a control unit, and can automatically control discharge cut-off when the discharge level reaches a preset condition, thereby avoiding over-discharge problems and improving the battery maintenance effect.

[0031] For details, please refer to Figure 1 , shown is a schematic diagram of the main module structure of the battery maintenance device in the embodiment of the utility model, which includes a discharge resistor R0 and an over-discharge protection module 20 arranged on a mounting bracket 10. The mounting bracket 10 also includes an adapter plate 11. The over-discharge protection module 20 is mainly fixed on the adapter plate 11 and is further arranged at one end of the discharge resistor R0.

[0032] Among them, the discharge resistor R0 is mainly used to control the size of the discharge current to take into account both safety and discharge efficiency. When used for the maintenance of one battery, the discharge resistor R0 can select a fixed value resistor according to specific needs; when used for the maintenance of multiple batteries, the discharge resistor R0 can be selected as a variable resistor, so that according to the configuration of the battery to be maintained, a suitable resistance value can be selected. Under the premise of ensuring safety, the discharge efficiency of multiple batteries is taken into account, thereby increasing the scope of application and improving practicality.

[0033] Moreover, when used for the maintenance of multiple batteries, the sizes of different batteries are generally different. Generally, they are connected to the battery maintenance device by wire connection. For the convenience of connection, the discharge rheostat R0 is also provided with a terminal. The over-discharge protection module 20 is pre-connected with the discharge rheostat R0. It only needs to be connected to the battery to be maintained through the terminal and the wire, which is convenient to operate.

[0034] Please refer to further Figure 2and Figure 3 , the discharge switch switching of the over-discharge protection module 20 is mainly realized by the first switch K1, the discharge input end of the over-discharge protection module 20 is connected to the positive end (Battery+) of the battery BT1 to be maintained, the discharge output end of the over-discharge protection module 20 is connected to the first end of the discharge resistor R0, the second end of the discharge resistor R0 is connected to the negative end of the battery BT1 to be maintained, and the over-discharge protection module 20 and the discharge resistor R0 are mainly connected through the second connector P2; the common end of the first switch K1 is connected to the discharge input end to access the positive end of the battery BT1 to be maintained, the first active end of the first switch K1 is connected to the discharge output end RL, and the second active end of the first switch K1 is grounded. When the first switch K1 is biased to the first active end, the positive end of the battery BT1 to be maintained is connected to the negative end through the discharge resistor R0 to form a discharge loop for discharge; when the first switch K1 is biased to the second active end, the positive end of the battery BT1 to be maintained is grounded to stop discharging.

[0035] The voltage sampling end of the control unit is connected to the discharge input end of the over-discharge protection module to detect the real-time voltage of the battery BT1 to be maintained. The over-discharge protection signal output end of the control unit is connected to the control end of the first switch to switch the setting state of the first switch when the real-time voltage of the battery BT1 to be maintained reaches a preset threshold value, thereby controlling the start and stop switching of the discharge.

[0036] The control unit generally implements main logic control through a control chip, and the operation of the control chip requires a stable power supply. Therefore, in this embodiment, the over-discharge protection module also includes a power management unit, the input end of the power management unit is connected to the discharge input end, and the power management unit includes a regulated voltage output end, which is connected to the working power input end of the control unit.

[0037] In this embodiment, if Figure 5 As shown, the power management unit is mainly implemented by a power chip D2, which is used to provide a 5V regulated power supply VCC. The power chip D2 can be, for example, an XL7005 DC-to-DC power chip. Specifically, other power chips can be selected according to the adaptation specifications of the battery BT1 to be maintained. The power management unit can be connected to the battery to be maintained through the first connector P1 to obtain power input.

[0038] like Figure 4 As shown, the main structure of the control unit in this embodiment is shown. In this embodiment, the control unit also includes: a protection threshold voltage setting switch, a digital tube DS1, and a control chip D6 connected to the protection threshold voltage setting switch and the digital tube DS1 and changing the reading of the digital tube DS1 when the protection threshold voltage setting switch is actuated or the voltage at the voltage sampling end changes.

[0039] Specifically, the protection threshold voltage setting switch includes a first setting switch S1 and a second setting switch S2, which can be used for increasing and decreasing the threshold voltage respectively. In the protection threshold voltage setting, the digital tube DS1 is used to display the protection threshold voltage. After the protection threshold voltage setting is completed, in the battery discharge control, the digital tube DS1 is used to display the real-time voltage of the battery BT1 to be maintained.

[0040] According to the available range of the battery maintenance device, that is, the configuration range of the battery to be maintained, the display range of the digital tube can be flexibly selected. In this embodiment, it is adapted to a variety of batteries to be maintained, and the voltage range can include 7V to 70V. Correspondingly, the number of digits of the digital tube DS1 can be selected as 3 digits, and the voltage display within the applicable range can be achieved through the eight-bit binary code. In fact, according to the specific accuracy requirements, digital tubes with other digits can be selected, and the backlight driving power supply of the digital tube DS1 can use a stabilized power supply VCC. Alternatively, an STM32 type single-chip microcomputer can be used as a control chip, and a display device with better effects such as an LCD display can be selected. The specific selection can be flexibly based on actual needs. Specifically, in this embodiment, the control chip D6 can use an STC8H08-20PIN type control chip, which can meet the use requirements.

[0041] A tenth resistor R10 and a ninth resistor R9 are connected in series between the voltage sampling terminal of the control unit and the ground, and the middle node of the tenth resistor R10 and the ninth resistor R9 is connected to the sampling input terminal of the control chip D6. A fifth capacitor C5 is also connected between the middle node of the tenth resistor R10 and the ninth resistor R9 and the ground to improve the stability of the sampling voltage and the control stability. The control chip D6 provides an over-discharge protection signal KK output based on the comparison between the voltage of the sampling input terminal and the set protection threshold voltage.

[0042] In this embodiment, the control logic of the control unit is relatively simple, and the control unit further includes a memory D7 connected to the control chip D6 for storing control programs, etc. The memory D7 is, for example, a 24C02 device, which can meet actual needs.

[0043] In this embodiment, the first switch K1 is a relay switch, a first end of the coil of the relay switch is connected to the regulated voltage output end to access the regulated voltage VCC, and the over-discharge protection module further includes a second transistor Q2 and a light-emitting diode D5.

[0044] The input end of the second transistor Q2 is connected to the second end of the coil of the relay switch, the output end of the second transistor Q2 is grounded, and the control end of the second transistor Q2 is connected to the over-discharge protection signal output end to control whether the coil of the relay switch is grounded according to the over-discharge protection signal KK, thereby controlling the setting switching of the relay switch.

[0045] The anode of the light emitting diode D5 is connected to the over-discharge protection signal output terminal, and the cathode is grounded, and the discharge state is maintained according to the state indication of the over-discharge protection signal KK.

[0046] Specifically, the first active end of the first switch K1 is, for example, a normally open end. When the battery BT1 to be maintained needs to be discharged, it is connected to the battery maintenance device of this embodiment. At this time, its voltage is greater than the protection threshold voltage, and the over-discharge protection signal KK output by the control unit is in a high-level state, which controls the second transistor Q2 to be turned on, and drives the light-emitting diode D5 to emit light. The electrical circuit of the coil of the first switch K1 is connected, connected to the normally open end, and discharge is performed; when the voltage of the battery BT1 to be maintained is less than the protection threshold voltage, the over-discharge protection signal KK output by the control unit is switched to a low-level state, the second transistor Q2 is turned off, and the light-emitting diode D5 is extinguished, indicating that the discharge is completed.

[0047] A fifth resistor R5 and a sixth resistor R6 are respectively connected in series on the control terminal input path of the second transistor Q2 and the input path of the light emitting diode D5, which can be used for current limiting control of the driving current to improve control safety.

[0048] To improve the reliability of relay control, in this embodiment, the over-discharge protection module also includes a third diode D3, the anode and cathode of the third diode D3 are respectively connected to the second end and the first end of the coil of the relay switch, which are used for freewheeling regulation to prevent the reverse electromotive force of the coil during the switching of the relay switch from affecting the magnetic attraction state of the switch.

[0049] To improve the indication effect, in the present embodiment, the over-discharge protection module further includes a first resistor R1 and a second resistor R2 connected in series between the second active end of the first switch K1 and the ground, and a buzzer LS1. The input end of the buzzer LS1 is connected to the regulated voltage output end to access the working power supply. The output end of the buzzer LS1 is grounded through the first transistor Q1. The control end of the first transistor Q1 is connected to the middle node between the first resistor R1 and the second resistor R2. When the discharge is completed, the setting of the first switch K1 is switched to the second active end. The voltage of the battery BT1 to be maintained is divided by the first resistor R1 and the second resistor R2 to drive the first transistor Q1 to turn on. The buzzer LS1 is grounded through the first transistor Q1 to connect the working circuit, and a sound indication is given to remind the operator that the discharge is completed.

[0050] In order to improve indication stability and reduce pulse interference, a first capacitor C1 is also connected in series between the control end of the first transistor Q1 and the ground to improve the voltage stability of the control end of the first transistor Q1, improve the state stability of the first transistor Q1, and further improve the working stability of the buzzer LS1 to provide indication reliability.

[0051] When the first switch K1 is a relay switch and its second active end is a normally closed end, at the moment when the battery BT1 to be maintained is connected, the control unit has not yet completed the response control, and a pulse current will be generated at the middle node of the first resistor R1 and the second resistor R2. The pulse current can be transmitted to the ground through the first capacitor C1, avoiding the opening of the first transistor Q1, thereby ensuring the indication reliability of the buzzer LS1.

[0052] And when the first capacitor C1 is not present, even if the first transistor Q1 is turned on, the buzzer LS1 emits a short sound indication. Compared with the continuous buzzing indication after the discharge is completed, the short sound indication can also be used as a prompt tone for system startup.

[0053] The battery maintenance device provided by the utility model includes a discharge resistor and an over-discharge protection module, wherein the discharge input end of the over-discharge protection module is connected to the positive end of the battery to be maintained, the discharge output end of the over-discharge protection module is connected to the first end of the discharge resistor, and the second end of the discharge resistor is connected to the negative end of the battery to be maintained, wherein the over-discharge protection module also includes a first switch and a control unit, wherein the common end of the first switch is connected to the discharge input end, and the first active end of the first switch is connected to the discharge output end, when the first switch is connected to the first active end, the connected battery to be maintained is connected in series with the discharge resistor to discharge, and the second active end of the first switch is grounded, and when it is switched to the second active end, the positive end of the battery to be maintained is grounded to stop discharging; the voltage sampling end of the control unit is connected to the discharge input end, and the over-discharge protection signal output end of the control unit is connected to the control end of the first switch. When the voltage of the battery to be maintained reaches a preset threshold value, the discharge degree reaches the expected level, and the control unit outputs an over-discharge protection signal, automatically controls the first switch to be biased to the second active end, and can realize automatic stop discharge control when the battery maintenance discharge reaches the standard, which can effectively avoid the over-discharge problem and ensure the battery maintenance effect.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A battery maintenance device, characterized in that: include: A discharge resistor and an over-discharge protection module, wherein the discharge input end of the over-discharge protection module is connected to the positive end of the battery to be maintained, the discharge output end of the over-discharge protection module is connected to the first end of the discharge resistor, and the second end of the discharge resistor is connected to the negative end of the battery to be maintained, wherein the over-discharge protection module further includes: a first switch, wherein a common end of the first switch is connected to the discharge input end, a first active end of the first switch is connected to the discharge output end, and a second active end of the first switch is grounded; A control unit, wherein a voltage sampling terminal of the control unit is connected to the discharge input terminal, and an over-discharge protection signal output terminal of the control unit is connected to the control terminal of the first switch.

2. The battery maintenance device according to claim 1, characterized in that: The over-discharge protection module further includes a power management unit, an input end of the power management unit is connected to the discharge input end, and the power management unit includes a regulated voltage output end, and the regulated voltage output end is connected to the working power input end of the control unit.

3. The battery maintenance device according to claim 1, characterized in that: The control unit also includes: a protection threshold voltage setting switch, a digital tube, and a control chip connected to the protection threshold voltage setting switch and the digital tube and changing the reading of the digital tube when the protection threshold voltage setting switch is actuated or the voltage at the voltage sampling end changes.

4. The battery maintenance device according to claim 3, characterized in that: The control unit also includes a memory connected to the control chip.

5. The battery maintenance device according to claim 2, characterized in that: The first switch is a relay switch, a first end of the coil of the relay switch is connected to the regulated voltage output end, and the over-discharge protection module further includes: a second transistor, wherein an input end of the second transistor is connected to a second end of the coil of the relay switch, an output end of the second transistor is grounded, and a control end of the second transistor is connected to the over-discharge protection signal output end; A light emitting diode, wherein the anode of the light emitting diode is connected to the over-discharge protection signal output terminal, and the cathode of the light emitting diode is grounded.

6. The battery maintenance device according to claim 5, characterized in that: The over-discharge protection module further includes: a third diode, wherein an anode and a cathode of the third diode are respectively connected to the second end and the first end of the coil of the relay switch.

7. The battery maintenance device according to claim 2, characterized in that: The over-discharge protection module also includes a first resistor and a second resistor connected in series between the second active end of the first switch and the ground, and a buzzer, wherein the input end of the buzzer is connected to the regulated voltage output end, the output end of the buzzer is grounded through a first transistor, and the control end of the first transistor is connected to the middle node between the first resistor and the second resistor.

8. The battery maintenance device according to claim 7, characterized in that: A first capacitor is also connected in series between the control terminal of the first transistor and the ground.

9. The battery maintenance device according to claim 1, characterized in that: It also includes a mounting bracket, the discharge resistor and the over-discharge protection module are fixedly arranged on the mounting bracket, and the over-discharge protection module is arranged at one end of the discharge resistor.

10. The battery maintenance device according to claim 1 or 3, characterized in that: The discharge resistor includes a variable resistor, and both ends of the variable resistor are provided with terminals.

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