Guide rail type storage battery device capable of being quickly connected

Abstract

The invention relates to the technical field of storage batteries, in particular to a guide rail type storage battery device capable of being quickly connected. Comprising a storage battery and a mounting base, the top of the mounting base is provided with a guide rail, the storage battery can slide along the guide rail, one end of the mounting base is provided with a connecting plate, and the connecting plate is provided with wiring terminals connected with a positive pole and a negative pole of the storage battery; a preset cable is arranged on the side wall, away from the mounting base, of the connecting plate and connected with the wiring terminal and the electric device. According to the storage battery device, the preset cable connected with the electric device and the wiring terminal connected with the storage battery are arranged on the connecting plate, the mounting base is fixedly connected with the electric device in advance, and when the storage battery device is used, the storage battery only needs to slide along the guide rail on the mounting base, so that the positive pole and the negative pole are connected with the wiring terminal on the connecting plate; the design can quickly distinguish the anode and the cathode of the storage battery, the storage battery is pushed in place along the guide rail to finish connection and fixation, and the operation is safe, quick, simple and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of storage batteries, in particular to a guide rail type storage battery device capable of quick connection. Background Art

[0002] Existing tracked equipment and wheeled equipment cannot do without batteries to provide instantaneous DC power (voltage between 24V and 27V) when starting. Batteries are usually connected in series and parallel. With the continuous improvement of equipment technology, the importance of technical support work has become increasingly prominent. It is particularly important to quickly install batteries so that vehicles can be dispatched quickly.

[0003] The current connection method of battery poles mainly has the following problems: 1. The poles are connected by bolts, which requires two wrenches to work together at the same time, making the operation difficult; 2. The space inside the battery box is small, and the positive and negative poles are not easy to identify, which is easy to reverse, and the connecting cables are prone to collision, causing the positive and negative poles to short-circuit and ignite, burning the poles and electrical equipment; 3. There are many cables for connecting multiple batteries in series and parallel, which are entangled with each other, inconvenient to connect, and prone to failure; 4. When parking or entering the garage, the connecting cables need to be removed to protect the power, and they need to be connected before going out, which is time-consuming and laborious. The above problems increase the difficulty of daily maintenance of batteries, consume manpower and time, and it is difficult to quickly complete technical support tasks. Therefore, the present invention is proposed. Summary of the invention

[0004] The object of the present invention is to provide a rail-type quick-connectable battery device, which can realize quick connection of batteries, is easy to operate, and solves the problems existing in the connection of battery poles in the prior art.

[0005] The present invention provides a rail-type quickly connectable storage battery device, comprising a storage battery and a mounting base, wherein a rail is provided on the top of the mounting base, the storage battery can slide along the rail, a connecting plate is provided on one side of the mounting base, the connecting plate is provided with wiring terminals connected to the positive pole and the negative pole of the storage battery; a preset cable is provided on a side wall of the connecting plate away from the mounting base, the preset cable is respectively connected to the wiring terminals and an electrical device.

[0006] Furthermore, the cross-sectional shape of the guide rail is an inverted trapezoid, and the bottom of the battery is provided with an inverted trapezoidal sliding groove that cooperates with the guide rail.

[0007] Furthermore, a plurality of roller bearings are respectively provided on both sides of the guide rail, and the bottom of the battery fits with the top of the roller bearings.

[0008] Furthermore, the mounting base includes a supporting base plate, one end of the supporting base plate is fixed to the connecting plate, side baffles are respectively provided on two opposite sides of the supporting base plate, and the guide rail and the roller bearing are both located on the supporting base plate.

[0009] Furthermore, a limit rod which can move up and down is provided at one end of the mounting base away from the connecting plate; a first groove is provided at one end of the support bottom plate away from the connecting plate, and mounting grooves connected to the first groove are provided on the two side baffles, and a spring is provided in the mounting groove, and both ends of the limit rod extend into the mounting groove, and both ends of the spring are respectively fixed to the bottom of the limit rod and the bottom wall of the mounting groove.

[0010] Furthermore, the battery includes a shell, a battery assembly is arranged inside the shell, the positive electrode column and the negative electrode column are arranged on one of the side walls of the shell, a second groove and a third groove are arranged on the connecting plate, the second groove and the third groove are both provided with the wiring terminals, the positive electrode column and the negative electrode column are respectively inserted into the second groove and the third groove to be connected to the wiring terminals.

[0011] Furthermore, a liquid crystal display and a switch are provided on the side wall of the shell, the switch includes a power switch KA and an emergency power-off switch Ks, and a switch circuit is provided inside the shell; a detection system is provided inside the shell, and the detection system is connected to the liquid crystal display and the switch circuit; the detection system is used to detect the internal resistance and voltage of the battery and the contact status with the wiring terminals.

[0012] Furthermore, the detection system includes a single-chip microcomputer, the single-chip microcomputer is connected to an instrument amplifier, a voltage reference chip, and a voltage regulator, the instrument amplifier is connected to a detection internal resistance, and the detection internal resistance is connected to the battery assembly.

[0013] Furthermore, the liquid crystal display screen adopts LMB-018A display module, the single chip computer adopts MSP430F135 microcontroller, the instrument amplifier adopts AD623, the voltage reference chip adopts LM385-1.2, and the voltage regulator adopts LP2950.

[0014] Furthermore, an internal resistance detection system is provided inside the shell, and the internal resistance detection system includes a path selection switch circuit, an amplification and filtering circuit, a sampling circuit, a square wave conversion circuit, a multiplier circuit, an integrator circuit, an AC constant current signal generator, and a control system, and the control system is connected to the liquid crystal display.

[0015] In summary, compared with the prior art, the present invention has the following advantages:

[0016] The technical solution provided by the present invention is to set a mounting base and a connecting plate, set a preset cable connected to the electrical device and a wiring terminal connected to the battery on the connecting plate, fix the mounting base in a suitable position in advance, and connect the preset cable on the connecting plate to the electrical device. When in use, the battery only needs to be slid along the guide rail on the mounting base to connect the positive pole and the negative pole to the wiring terminal on the connecting plate. This design can quickly distinguish the positive and negative poles of the battery, and the connection and fixation can be completed by pushing the battery into place along the guide rail. The operation is safe and simple. The connecting cable is pre-designed on the side wall of the connecting plate according to the circuit requirements of the electrical device, so repeated wiring can be avoided during use, and the operation is simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the structure of the battery device in Example 1 of the present invention;

[0019] Figure 2 It is a right side view of the battery device in Embodiment 1 of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure in which the battery and the mounting base are disassembled in Embodiment 1 of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the mounting base and the connecting plate in Embodiment 1 of the present invention;

[0022] Figure 5 It is a left side cross-sectional view of the mounting base in Embodiment 1 of the present invention;

[0023] Figure 6 is a perspective view of a battery device in Embodiment 1 of the present invention;

[0024] Figure 7 is a perspective view of the battery device in Embodiment 1 of the present invention from another angle;

[0025] Figure 8 is a circuit diagram of a detection system in Example 1 of the present invention;

[0026] Fig. 9 is a circuit diagram of a switch circuit in Embodiment 1 of the present invention;

[0027] Fig.10This is a schematic diagram of the internal resistance measurement of a battery in Embodiment 2 of the present invention;

[0028] Fig.11 is a system block diagram of an internal resistance detection system in Embodiment 2 of the present invention;

[0029] Fig.12 This is an enlarged diagram of the preamplifier signal in Example 2 of the present invention;

[0030] Fig.13 It is a device logic diagram of AD630 in Embodiment 2 of the present invention;

[0031] Fig.14 This is a schematic diagram of a related detection circuit implemented by AD630 in Embodiment 2 of the present invention.

[0032] Explanation of the reference numerals: 1-battery; 101-positive pole; 102-negative pole; 103-slide; 104-LCD display; 105-power switch KA; 106-emergency power-off switch Ks; 2-mounting base; 201-support base plate; 2011-first groove; 202-side baffle; 2021-mounting groove; 3-guide rail; 4-connecting plate; 401-second groove; 402-third groove; 5-connecting terminal; 6-roller bearing; 7-limiting rod; 8-spring. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Example 1

[0037] A rail-type quick-connectable battery device, such as Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, it includes a battery 1 and a mounting base 2, a guide rail 3 is provided on the top of the mounting base 2, the battery 1 can slide along the guide rail 3, a connecting plate 4 is provided at one end of the mounting base 2, the connecting plate 4 is provided with a wiring terminal 5 connected to the positive pole 101 and the negative pole 102 of the battery 1, and a preset cable is provided on the side wall of the connecting plate 4 away from the mounting base 2, and the preset cable is respectively connected to the wiring terminal 5 and the electrical device.

[0038] like Figure 4 As shown, the mounting base 2 includes a supporting base plate 201, a guide rail 3 is fixed on the top of the supporting base plate 201, the length of the guide rail 3 is shorter than the length of the supporting base plate 201, the center line of the guide rail 3 is aligned with the center line of the supporting base plate 201, and side baffles 202 are fixed on opposite sides of the supporting base plate 201. In this embodiment, the supporting base plate 201 and the two side baffles 202 are integrally formed.

[0039] A connecting plate 4 arranged in a vertical direction is fixed to one end of the supporting base plate 201, and a second groove 401 and a third groove 402 are arranged on the side wall of the connecting plate 4 close to the supporting base plate 201, and a connecting terminal 5 is arranged in each of the second groove 401 and the third groove 402. The storage battery 1 includes a shell, and a battery assembly is arranged inside the shell. A positive pole 101 and a negative pole 102 are arranged on one of the side walls of the shell, and the positive pole 101 and the negative pole 102 are distributed and inserted into the second groove 401 and the third groove 402 and connected to the connecting terminal 5, and at the same time, the shell side wall of the storage battery 1 is tightly fitted with the side wall of the connecting plate 4. The two connecting terminals 5 in this embodiment can be connected to the positive pole 101 and the negative pole 102 in the form of snap-on or direct contact. When in use, multiple storage batteries 1 can be used simultaneously according to the power demand, and the preset cables on the rear side of the connecting plate 4 equipped with each storage battery 1 are pre-connected in series or in parallel according to requirements.

[0040] The battery 1 in the present invention is improved on the conventional battery in the prior art in the field, and the improvements are as follows: 1. The positive pole 101 and the negative pole 102 are arranged on the same side wall of the shell; 2. A slide groove 103 cooperating with the guide rail 3 is arranged at the bottom of the shell; 3. A liquid crystal display screen 104 is arranged on the shell; 4. A switch is arranged on the shell, and the switch includes a power switch KA105 and an emergency power-off switch Ks 106. A switch circuit and a detection system are arranged inside the shell, and the detection system is connected to the liquid crystal display screen 104, the switch circuit and the battery assembly; the detection system is used to detect the internal resistance, voltage and contact status of the battery 1 with the terminal 5, and display them through the liquid crystal display screen 104.

[0041] In this embodiment, the cross-sectional shape of the guide rail 3 is an isosceles inverted trapezoid with rounded corners. Figure 3 As shown, the chute 103 at the bottom of the battery 1 shell is an inverted trapezoidal chute that cooperates with the guide rail 3. The inverted trapezoidal guide rail 3 and the inverted trapezoidal chute 103 can limit the width direction of the battery 1 to prevent the battery 1 from shaking during the movement of the equipped vehicle. The positive pole 101 and the negative pole 102 are arranged on the side of the shell to facilitate connection with the terminal 5 on the connecting plate 4. When in use, directly align the chute 103 of the battery 1 with the guide rail 3 on the mounting base 2, push the battery 1 to slide along the guide rail 3, and insert the positive pole 101 and the negative pole 102 into the second groove 401 and the third groove 402 respectively to connect with the terminal 5. The operation is simple, and repeated wiring can be avoided during use, achieving the effect of "laying out and forgetting".

[0042] like Figure 4As shown, a plurality of roller bearings 6 are arranged on both sides of the guide rail 3 at the top of the supporting bottom plate 201. When the battery 1 slides, its bottom contacts the top of the roller bearing 6. The arranged roller bearing 6 reduces friction and labor when the battery 1 slides, and the installation is faster. In this embodiment, the roller bearing 6 adopts a zirconia ceramic bearing produced by Jinzhan Bearing (Shanghai) Co., Ltd., and four installation grooves are arranged on both sides of the guide rail 3, and a roller bearing 6 is installed in each installation groove.

[0043] like Figure 2 As shown, a limit rod 7 that can move up and down is provided at one end of the mounting base 2 away from the connecting plate 4, which is used to limit the length direction of the battery 1 to prevent the battery 1 from sliding off the mounting base 2 during the movement of the vehicle. Figure 4 and Figure 5 As shown, a first groove 2011 is provided at one end of the support bottom plate 201, a limiting rod 7 is placed in the first groove 2011, the depth of the first groove 2011 is greater than the diameter of the limiting rod 7, and a mounting groove 2021 connected to the first groove 2011 is provided on each of the two side baffles 202, and both ends of the limiting rod 7 extend into the two mounting grooves 2021, respectively. A spring 8 is provided in the mounting groove 2021, and both ends of the spring 8 are respectively fixed to the bottom of the limiting rod 7 and the bottom wall of the mounting groove 2021. The bottom walls of the two mounting grooves 2021 are flush with the bottom wall of the first groove 2011, and the top wall of the mounting groove 2021 is higher than the top of the support bottom plate 201. When in use, one end of the battery 1 is placed on the supporting bottom plate 201. Under the gravity of the battery 1, the limiting rod 7 is pressed into the first groove 2011. When the battery 1 is installed, the limiting rod 7 rises from the first groove 2011 under the action of the spring 8 to limit the battery 1. When disassembling the battery 1, the limiting rod 7 is pressed into the first groove 2011 by external force, and the battery 1 is slid toward the end away from the connecting plate 4.

[0044] The limiting rod 7 and two side baffles 202 provided on the mounting base 2 work together with the connecting plate 4 to limit the surroundings of the battery 1 to ensure the installation stability of the battery 1. The thickness of the supporting base 201, the height of the side baffles 202 and the highest position of the limiting rod 7 can be designed according to the size of the battery 1.

[0045] A power switch KA105, an emergency power-off switch Ks106 and a liquid crystal display screen 104 are provided on the side wall of the housing opposite to the connecting plate 4. A switch circuit and a detection system are provided inside the housing, and the detection system is connected to the battery assembly, the liquid crystal display screen 104 and the switch circuit. The switch in this embodiment includes two switches, the power switch KA105 and the emergency power-off switch Ks106. The switch circuit is as shown in FIG. Fig. 9As shown: the power switch KA105 is connected to the positive pole 101 of the battery 1, the power switch KA105 is connected in parallel with the emergency power-off switch Ks106, the emergency power-off switch Ks106 is connected to the control terminal terminal of the DC contactor, and the other control terminal terminal of the DC contactor is connected to the negative pole 102 of the battery 1; the positive pole 101 of the battery 1 is connected to the contact terminal of the DC contactor, and the other contact terminal of the DC contactor is connected to the terminal 5 on the connecting plate 4; the positive pole 101 of the battery 1 is connected to the voltage detection circuit through the power switch KA105, which is used to turn on the detection system.

[0046] After the battery 1 and the equipment vehicle are installed, when the power switch KA105 is closed, the DC contactor connects the positive pole 101 of the battery 1 with the positive pole of the equipment vehicle, thereby supplying power to the vehicle; in an emergency, the emergency power-off switch Ks106 is pressed, the DC contactor is disconnected, and the connection between the positive pole of the battery 1 and the equipment vehicle is cut off, thereby protecting the circuit; at the same time, when the power switch KA105 is closed, the positive pole 101 of the battery 1 is connected to the circuit of the detection system, and the voltage, internal resistance and contact state of the battery 1 are measured.

[0047] The emergency power-off switch Ks 106 is used to control the power supply and power-off of the battery 1. The emergency power-off switch Ks 106 has the following three functions: 1. The power supply can be directly disconnected on the mounting base 2 without removing the battery 1 from the mounting base 2, thereby ensuring the power consumption of the battery 1 and extending the life of the battery 1; 2. Preventing the pole from being short-circuited and burned due to the pole being accidentally contacted with the terminal 5 during the disassembly process; 3. Preventing the pole from igniting instantly when contacting with the terminal 5 when installing the battery 1. The connection and disconnection of the power supply is controlled by the emergency power-off switch Ks 106 during use, which is safer.

[0048] The detection system includes a single chip microcomputer, an instrumentation amplifier, a reference voltage device, and a voltage regulator. The instrumentation amplifier is connected to the detection internal resistance, and the detection internal resistance is connected to the battery assembly. The detection system detects the current and voltage parameters of the battery 1 during operation by detecting the internal resistance, and displays this information in real time on the liquid crystal display screen 104, so that the staff can timely understand the power status of the battery 1; at the same time, the contact status between the battery 1 and the terminal 5 on the connecting plate 4 is detected and displayed on the liquid crystal display screen 104. The liquid crystal display screen 104 adopts the LMB-018A dot matrix liquid crystal display module.

[0049] The circuit of the detection system is as follows Figure 8As shown, the single-chip microcomputer uses the MSP430F135 low-power microcontroller, the voltage regulator uses the LP2950, ​​the instrument amplifier uses the AD623, and the voltage reference chip uses the LM385-1.2 micro-power voltage reference chip of TI. The processing core of the voltage detection system uses the low-power mixed signal processor MSP430135 single-chip microcomputer of TI as the main processor. The single-chip microcomputer uses a 3.8V DC power supply and has extremely low power consumption. It integrates a 12-channel 12-bit A / D converter on the chip, 8 channels of which are external, and the other 4 channels can be used to monitor the working conditions on the chip.

[0050] The detection system is powered by a 9V battery, and the voltage regulator LP2950 is used to reduce the 9V supply voltage to 3.3V. In this way, the entire system can work normally before the battery voltage drops to 4V, and the system chip will not change its performance due to the reduction of the battery voltage.

[0051] Input circuit of the detection system: The measured signal is divided by the internal resistors R1 and R2 and adjusted to the acceptable range (0-2.5v) of the single-chip microcomputer MSP430F135. The influence of the static voltage of AD623 should also be considered. AD623 is a low-power instrumentation amplifier that achieves full-amplitude output in the range of 3V-12V. On the one hand, it plays the role of a voltage follower, and on the other hand, it can suppress the interference caused by the environment. Together with capacitor C1 and voltage regulator, it plays a role in enhancing the reliability and accuracy of the system. The LM385-1.2 is a 1.2V voltage reference, and its output is used as the static reference of AD623. Because AD623 works on a single power supply, a static reference voltage is required to ensure that it has a good dynamic range.

[0052] The display module of the detection system adopts the dot matrix liquid crystal module LMB-018A, which has an operating voltage of 3.3V, easy control, low power consumption, and an operating current of 0.25mA to display the detection results.

[0053] The method for using the battery device provided by the present invention is as follows: first, a preset cable is arranged on the rear side of the connecting plate 4 according to the power demand of the power-consuming device, the preset cable is connected to the power-consuming device, and the mounting base 2 is fixed to the relevant equipment; one end of the battery 1 is placed on the supporting bottom plate 201, the limiting rod 7 is pressed into the first groove 2011, and the battery 1 is slid along the guide rail 3 until the positive pole 101 and the negative pole 102 of the battery 1 are connected to the two wiring terminals 5 on the connecting plate 4, at this time, the limiting rod 7 rises to the top of the supporting bottom plate 201 under the action of the elastic force of the spring 8, and the end of the battery 1 away from the connecting plate 4 is limited, and after the battery 1 is installed, the power switch KA 105 is started, the power is connected, and the power supply is supplied to the power-consuming device. When the battery 1 needs to be removed, the emergency power-off switch Ks 106 is first turned off to disconnect the power supply, and the limiting rod 7 is pressed into the first groove 2011, and the battery 1 is slid in the direction away from the connecting plate 4.

[0054] The battery device provided by the present invention improves the traditional pole bolt connection method into a guide rail contact connection method. This design can quickly distinguish the positive and negative poles of the battery. The battery can be pushed into place along the guide rail to complete the connection and fixation. The operation is safe and simple. The connection cable adopts a pre-laid method to simplify the connection, the layout is simple, and repeated wiring is avoided. A power switch is installed, and the connection can be disconnected without removing the battery. The power supply can be quickly disconnected after parking, which ensures the battery power. The safety factor is large and the pole and electrical equipment will not be burned. At the same time, the battery is also equipped with a voltage, internal resistance and contact status detection system and a liquid crystal display screen, which is convenient for security personnel to quickly check the battery status.

[0055] Example 2

[0056] A rail-type quick-connectable battery device, the technical solution in this embodiment is basically the same as that in embodiment 1, except that: in this embodiment, the detection system is replaced by an internal resistance detection system. The internal resistance detection system in this embodiment uses the AC injection detection method in the prior art to detect the internal resistance of the battery.

[0057] During the operation, use and maintenance of equipment vehicles, the energy supply of lead-acid batteries is related to the mobility safety and reliable operation of equipment vehicles. In order to ensure the good performance of the battery of the equipment vehicle and extend the battery life, the health state (SOH) of the battery must be monitored in a timely and accurate manner. The degradation of battery performance can be identified and the end of its life cycle can be detected through SOH prediction. SOH reflects the ratio of performance parameters to nominal parameters after the battery has been used for a period of time. For a new, unused battery, the SOH value is 100% at the beginning of its life cycle, and decreases with the use time until the end of its life cycle. When the SOH is less than a certain ratio, the battery cannot continue to be used and needs to be repaired or replaced. Therefore, accurate SOH prediction can avoid excessive maintenance and overhaul of the battery of the equipment vehicle, reduce its use cost and timely avoid unexpected failures during equipment vehicle training.

[0058] Among the SOH indicators, the internal resistance measurement of lead-acid batteries is one of the important parameters that reflect battery performance. Through research, it is found that the battery capacity and health status are closely related to the internal resistance. Therefore, online monitoring of the battery's SOH through the change of internal resistance is currently recognized as one of the best solutions for battery maintenance.

[0059] The internal resistance of a battery is generally very small, only tens of milliohms or even a few milliohms. The DC discharge method is slow and impossible to measure the internal resistance. The signal measured by the AC injection method is very weak and is drowned out by the noise in the charger and the environment. Therefore, how to effectively suppress noise has become a key technology for online measurement of battery internal resistance.

[0060] The goal of equipping the vehicle battery internal resistance online measurement system is to accurately measure the battery terminal voltage, internal resistance and temperature signals, and use computer technology to process and analyze data based on the battery charge state estimation model to achieve accurate grasp of the battery charge state, providing an accurate and intuitive basis for the use and maintenance of batteries in harsh environments.

[0061] The basic principle of using AC injection detection method to detect the internal resistance of the battery is as follows: Fig.10 As shown in Figure 1, when the signal source injects an AC current signal into the battery, the internal resistance of the battery can be calculated by measuring the AC voltage signal and input current generated at both ends of the battery:

[0062]

[0063] Where: V rms is the effective value of the AC voltage signal at both ends of the battery; I rms is the effective value of the AC current signal in the input battery.

[0064] The AC method is used to measure the internal resistance of the battery. There is no need to discharge the battery. Theoretically, the battery can be measured in any state.

[0065] In actual measurement, since the internal resistance of the battery is in the micro-ohm or milliohm level, after a certain current is injected, the voltage signal generated at both ends of the battery is very weak and is often submerged by noise. After amplification and then measurement, it is difficult to distinguish useful signals using an AC voltmeter. The principle of correlation detection is required to measure the AC voltage signal at both ends of the battery.

[0066] The AC method is used to measure the internal resistance of the battery. It consists of a switch multiplier and an integrator. The weak signal detected at both ends of the battery is input to the signal input end of the multiplier after being pre-amplified and filtered. The sine wave signal injected into the battery is transformed into a square wave signal through the circuit and then input to the reference signal end of the multiplier. If the useful signal at both ends of the battery is Vs(t) and the mixed noise is n1(t), the mixed signal at the input end is f 1(t) = Vs(t) + n1(t); the useful signal at the reference end is Vr(t-τ); when the mixed noise is n2(t-τ), the mixed signal at the reference end is f 2(t-τ) = V r(t-τ) + n2(t-τ).

[0067] According to the principle of correlation detection, through the multiplication operation of the multiplier, the signal and the noise, the noise and the noise are independent of each other, and their correlation function is zero. Only the signal and the signal are correlated and can be detected from the noise. It can be specifically expressed as:

[0068]

[0069] V S (t) = e s cosω s t

[0070]

[0071] When the sinusoidal signal detected at both ends of the battery is Vs(t), the square wave reference signal is Vr(t-τ):

[0072]

[0073] Because the signal frequency at both ends of the battery is the same as the fundamental frequency of the reference signal, that is, ωr = ωs, the output of the integrator is:

[0074]

[0075] Where: K is only related to the transmission coefficient of the integrator; is the difference between the detection signal and the reference signal.

[0076] If you adjust The output DC signal reaches the maximum value, which fully demonstrates that the noise is suppressed after passing through the multiplier and integrator. When the input signal and the circuit transmission coefficient are constant, the size of the output signal is only proportional to the internal resistance of the battery. As long as the AC voltage value at both ends of the battery and the AC current value passing through the battery are measured, the internal resistance of the battery can be calculated to achieve online measurement.

[0077] The system block diagram of the resistance detection system designed based on the above principle is as follows: Fig.11 As shown, it is composed of a channel selection switch circuit CD4052, an amplification and filtering circuit, an AD630 multiplier circuit, an integrator circuit, an AC constant current signal generator, a square wave conversion circuit, a sampling circuit, and a control system. The control system uses a single-chip microcomputer, and the single-chip microcomputer is connected to the liquid crystal display screen 104. Since the internal resistance of the battery is very small, the influence of the wire on the internal resistance of the battery must be reduced, so the four-lead connection method is adopted. The AC constant current signal output by the system is connected to both ends of the battery, and then the voltage signal generated by the internal resistance of the battery is connected to the input conversion switch circuit. After power-on, the single-chip microcomputer first controls the adjustment of the phase difference between the detection signal and the reference signal to 0. After starting the measurement, the current measurement channel is first selected by the channel selection switch CD4052. The channel sets a standard sampling resistor in the loop that injects the AC signal into the battery to measure the current value of the AC signal; then the voltage measurement channel is selected to measure the voltage value. The collected signal is sent to the single-chip microcomputer after amplification and filtering, and the internal resistance of the battery is calculated using formula 1.

[0078] Since the collected signal is very weak, it must be pre-amplified and filtered before being input into the correlator. Fig.12 As shown in the figure, the preamplifier filter circuit consists of an instrument amplifier AD620 (OP27) and a bandpass filter. AD620 is a high-performance, stable, and gain-adjustable device. Its gain is determined by the resistor RG between pins 1 and 8, G = 1 + (49.4kΩ / RG). After the signal is amplified, the bandpass signal of 0.4 to 3kHz is detected by the bandpass filter and transmitted to the multiplier signal terminal. The DC amplifier circuit uses a high-precision operational amplifier OP27 to achieve programmable gain amplification. The feedback resistor of the amplifier is selected using the path selection switch CD4052. The gain is selected through the microcontroller control to keep the signal within the optimal A / D acquisition voltage range.

[0079] In the design, the correlator uses AD630 produced by AD Company, which is a high-precision balanced modulator. The internal resistors are all high-stability SiCr thin film resistors, which ensures the accuracy and stability of its operation. Its signal processing applications include balanced modulation and demodulation, synchronous detection, phase detection, orthogonal detection, phase-sensitive detection, lock-in amplification and square wave multiplication.

[0080] AD630 logic diagram Fig.13As shown, it can be considered as integrating two preamplifiers, one for the precision of the preamplifier, and one as a multi-way selection switch and output stage integration. It has a high switching speed and a fast and stable linear amplifier. Due to the fast response time of the comparator, the switching distortion can be minimized. In addition, there is extremely low crosstalk between channels. AD630 is usually used for high-precision signal processing and instruments with a wide dynamic range. In the phase-locked amplifier circuit, when it is used as a synchronous demodulator, it can recover weak signals in a 100dB noise background. The optimal operating frequency of AD630 is 1kHz, so the signal injected into the battery and the reference signal are selected as 1kHz. At the same time, 1kHz is also in the appropriate battery internal resistance range, but it can still work normally at a few tenths of a megahertz.

[0081] The schematic diagram of the correlation detection circuit using AD630 as a multiplier is shown below: Fig.14 As shown. Among them, AMP A and AMPB are configured as positive amplifier and inverting amplifier respectively. The input signals are a signal to be detected and a reference signal. The signal to be detected is input through pin 1, and the reference signal is input to the comparison amplifier through pin 9. The signal to be detected is flipped inside the device according to the positive and negative of the carrier signal, realizing the switch multiplication function.

[0082] The method of AC injection correlation detection is used to achieve online measurement of the internal resistance of the battery. It can measure the internal resistance intact, conveniently, quickly and accurately without affecting the performance of the battery, which is of great significance for the monitoring of the battery operation status. In view of the use of vehicle batteries in harsh environments, the system has high measurement accuracy and can be widely used for measuring the state of charge of vehicle batteries when they are stationary or in use. At the same time, after obtaining the battery characteristic parameters and state of charge data, the detection system can also store them to establish a battery health file and predict battery failure, providing accurate and reliable reference information for timely elimination of latent faults and prediction of battery development trends.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rail-type quick-connectable battery device, characterized in that: The invention comprises a storage battery (1) and a mounting base (2), wherein a guide rail (3) is provided on the top of the mounting base (2), and the storage battery (1) can slide along the guide rail (3); a connecting plate (4) is provided at one end of the mounting base (2), and the connecting plate (4) is provided with a wiring terminal (5) connected to a positive pole (101) and a negative pole (102) of the storage battery (1); a preset cable is provided on a side wall of the connecting plate (4) away from the mounting base (2), and the preset cable is respectively connected to the wiring terminal (5) and an electrical device.

2. The battery device according to claim 1, characterized in that: The cross-sectional shape of the guide rail (3) is an inverted trapezoid, and the bottom of the storage battery (1) is provided with an inverted trapezoidal sliding groove (103) that matches the guide rail (3).

3. The battery device according to claim 1, characterized in that: A plurality of roller bearings (6) are respectively provided on both sides of the guide rail (3), and the bottom of the battery (1) is in contact with the top of the roller bearing (6).

4. The battery device according to claim 3, characterized in that: The mounting base (2) comprises a supporting base plate (201), one end of the supporting base plate (201) is fixed to the connecting plate (4), side baffles (202) are respectively provided on two opposite sides of the supporting base plate (201), and the guide rail (3) and the roller bearing (6) are both located on the supporting base plate (201).

5. The battery device according to claim 4, characterized in that: A limit rod (7) that can move up and down is provided at one end of the mounting base (2) away from the connecting plate (4); a first groove (2011) is provided at one end of the supporting base plate (201) away from the connecting plate (4); a mounting groove (2021) that is connected to the first groove (2011) is provided on the two side baffles (202); a spring (8) is provided in the mounting groove (2021); two ends of the limit rod (7) extend into the mounting groove (2021); and two ends of the spring (8) are respectively fixed to the bottom of the limit rod (7) and the bottom wall of the mounting groove (2021).

6. The battery device according to claim 1, characterized in that: The storage battery (1) comprises a shell, a battery assembly is arranged inside the shell, the positive electrode column (101) and the negative electrode column (102) are arranged on one side wall of the shell, the connecting plate (4) is provided with a second groove (401) and a third groove (402), the second groove (401) and the third groove (402) are both provided with the connecting terminal (5), the positive electrode column (101) and the negative electrode column (102) are respectively inserted into the second groove (401) and the third groove (402) to be connected to the connecting terminal (5).

7. The battery device according to claim 6, characterized in that: A liquid crystal display screen (104) and a switch are provided on the side wall of the housing, the switch comprising a power switch KA (105) and an emergency power-off switch Ks (106), and a switch circuit is provided inside the housing; a detection system is provided inside the housing, the detection system is connected to the liquid crystal display screen (104) and the switch circuit; the detection system is used to detect the internal resistance and voltage of the storage battery (1) and the contact state with the connection terminal (5).

8. The battery device according to claim 7, characterized in that: The detection system includes a single-chip microcomputer, which is connected to an instrument amplifier, a voltage reference chip, and a voltage stabilizer. The instrument amplifier is connected to a detection internal resistor, and the detection internal resistor is connected to the battery assembly.

9. The battery device according to claim 8, characterized in that: The liquid crystal display screen (104) adopts the LMB-018A display module, the single chip computer adopts the MSP430F135 microcontroller, the instrument amplifier adopts AD623, the voltage reference chip adopts LM385-1.2, and the voltage regulator adopts LP2950.

10. The battery device according to claim 6, characterized in that: An internal resistance detection system is arranged inside the housing, and the internal resistance detection system comprises a path selection switch circuit, an amplification filter circuit, a sampling circuit, a square wave conversion circuit, a multiplier circuit, an integrator circuit, an AC constant current signal generator, and a control system, and the control system is connected to a liquid crystal display screen (104).

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