BMS system and mower thereof

Abstract

The utility model provides a BMS (Battery Management System) and a mower thereof, and belongs to the technical field of machinery. The problem of poor stability in the prior art is solved. The BMS system comprises a lifting assembly, a front-back moving assembly, a left-right moving assembly, a base plate and a shell internally provided with a cavity, the base plate is in a flat plate shape, a plurality of BMS modules are fixedly connected to the base plate, the base plate is connected to the upper portion of the front-back moving assembly, and the front-back moving assembly is connected to the upper portion of the left-right moving assembly; the left-right moving assembly is connected to the lifting assembly, the front-back moving assembly can drive the base plate to move front and back, the left-right moving assembly can drive the front-back moving assembly to move left and right, and the lifting assembly can drive the front-back moving assembly to move up and down. The BMS system is high in stability.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric control and relates to a BMS system. Background Art

[0002] A lawn mower needs to power multiple electronic control units. Therefore, a single battery pack can no longer meet the demand. Multiple batteries are usually connected in parallel in an orderly manner on a lawn mower. Multiple batteries connected in parallel can increase the battery capacity and maximum charge and discharge current.

[0003] Since different batteries have different capacities and powers, when two groups of batteries are connected in parallel, the voltages need to be close so that they can be connected in parallel directly, safely and stably.

[0004] When there is a significant voltage difference between the two batteries, the battery pack with a higher voltage will charge the battery pack with a lower voltage. Since the internal resistance of the battery is small, when the voltage difference is large, the charging current will be too large, thus causing damage to the battery.

[0005] In order to solve the above problems, a BMS management system is usually provided at several battery packs in an existing lawn mower.

[0006] A battery management system (BMS) that monitors the operating status of the battery pack and is used for monitoring, calculation, communication, and protection of the battery pack.

[0007] Monitoring: BMS can monitor various status indicators of the battery pack, including voltage (single cell voltage, total voltage, or a specific voltage in between), temperature (average temperature, temperature of a single cell), input / output current, health of a single cell, and cell balance status;

[0008] Calculation: BMS can calculate the values ​​of many indicators, including voltage (minimum and maximum cell voltage), state of charge (SoC) indicating the charging level, state of health (SoH) measuring battery capacity, state of safety (SOS), maximum charging current, i.e. charge current limit (CCL), maximum discharge current, i.e. discharge current limit (DCL), cell internal resistance that determines open circuit voltage, total power provided, total operating time, temperature monitoring, etc.

[0009] Communication: The central controller inside the BMS can communicate with internal hardware, and can also communicate externally through various means (such as USB, CAN or wireless communication protocols);

[0010] Protection: BMS can also provide various protections for the battery to prevent the battery pack status from exceeding the safe operating area (SOA), such as charge / discharge overcurrent, charge / discharge overvoltage, overtemperature, overpressure, and current leakage.

[0011] Since the existing BMS system has multiple BMS modules, the installation is too complicated, resulting in a non-compact structure. Utility Model Content

[0012] The purpose of the utility model is to provide a BMS system with high applicability and relatively high stability in view of the above problems existing in the prior art.

[0013] The purpose of the utility model can be achieved through the following technical solutions:

[0014] A BMS system, a lawn mower includes a frame, the frame has multiple groups of one-to-one corresponding BMS modules and battery packs, and the multiple BMS modules are connected via a CAN bus and a bidirectional converter. The BMS system includes a lifting component, a front-and-rear moving component, a left-and-right moving component, a substrate, and a shell with a cavity inside. The substrate is in a flat plate shape and multiple BMS modules are fixedly connected to the substrate. The substrate is connected to the upper part of the front-and-rear moving component, the front-and-rear moving component is connected to the upper part of the left-and-right moving component, and the left-and-right moving component is connected to the lifting component. The front-and-rear moving component can drive the substrate to move forward and backward, the left-and-right moving component can drive the front-and-rear moving component to move left and right, and the lifting component can drive the front-and-rear moving component to move up and down.

[0015] This BMS system creatively connects the BMS module to the base plate.

[0016] The lifting assembly can drive the substrate to move up and down stably, the front and rear moving assembly can drive the substrate to move left and right stably, and the left and right moving assembly can drive the substrate to move forward and backward stably.

[0017] That is, the substrate is located in the housing in the initial state. When the BMS system needs to be repaired and maintained, the lifting assembly, the front and rear swing assembly and the left and right moving assembly cooperate to finally extend the substrate with the BMS module out of the housing at a suitable height.

[0018] Of course, the side of the shell is open and there is a door that can be opened and closed at the opening of the shell. The door needs to be opened during the inspection and maintenance operation.

[0019] In the above-mentioned BMS system, the lifting assembly includes a guide rod 1, a screw rod 1, a driving member 1 and a lifting plate. The above-mentioned guide rod 1 and screw rod 1 are both vertically arranged and parallel to each other. The above-mentioned driving member 1 is fixedly connected in the shell and the driving member 1 is connected to the screw rod 1. The above-mentioned guide rod 1 and screw rod 1 are both passed through the lifting plate and the screw rod 1 is threadedly connected to the lifting plate. The upper part of the lifting plate is used to connect the left and right moving assembly and the front and back moving assembly.

[0020] When the driving member drives the lead screw to rotate continuously, the guide rod limits the swing of the lifting plate, so the lifting plate moves up and down smoothly along the guide rod.

[0021] At the same time, the lifting plate provides enough space for the left-right moving components and the front-back moving components to be connected and installed.

[0022] In the above-mentioned BMS system, the driving component 1 is a motor, and the rotating shaft of the motor is connected to the screw rod 1.

[0023] The motor can drive the screw rod to rotate stably during continuous rotation.

[0024] In the above-mentioned BMS system, the number of the guide rods 1 is two and the two are arranged in parallel, and the above-mentioned screw rod 1 is located between the two guide rods 1.

[0025] The arrangement of the two guide rods 1 can ensure the stable translation of the lifting plate up and down. At the same time, the screw rod 1 is located between the two guide rods 1, which effectively improves the compactness of the structure.

[0026] In the above-mentioned BMS system, the left and right moving components include two guide rods, two screw rods, two driving members and a frame. The above-mentioned two guide rods and two screw rods are horizontally arranged. The two guide rods and two screw rods are both passed through the lower part of the frame and the screw rods are threadedly connected to the frame. The two driving members are connected to the screw rods. The upper part of the frame is used to connect the front and rear moving components.

[0027] The second driving member drives the second screw rod to rotate, and the second guide rod limits the swing of the frame body, so the frame body can translate stably along the second guide rod.

[0028] At the same time, sufficient space is provided on the frame for connecting the components that can be moved forward and backward.

[0029] In the above-mentioned BMS system, the number of the guide rods 2 is two and the two are arranged in parallel, and the above-mentioned screw rod 2 is located between the two guide rods 2.

[0030] The arrangement of the two guide rods 2 can effectively improve the movement stability of the frame.

[0031] In the above-mentioned BMS system, the second driving member is a rocker fixedly connected to the two ends of the screw rod.

[0032] After applying external force to rotate the rocker, the screw rod 2 can rotate stably, and finally drive the frame to move stably left and right.

[0033] In the above-mentioned BMS system, the front-rear moving component includes a driving wheel, a driven wheel, a conveyor belt and a driving member three. The driving wheel and the driven wheel are respectively connected to the front and rear ends of the frame, the conveyor belt is sleeved on the driving wheel and the driven wheel, and the driving member three is fixedly connected in the frame and the driving member three is connected to the driving wheel.

[0034] As the driving wheel continues to rotate, the conveyor belt between the driving wheel and the driven wheel moves smoothly.

[0035] Of course, the driving member 3 is used to stably drive the driving wheel to rotate.

[0036] In the above-mentioned BMS system, the third driving component is a motor, and the rotating shaft of the motor is connected to the driving wheel.

[0037] In the above-mentioned BMS system, both ends of the lifting plate have protruding connecting parts, and both ends of the above-mentioned guide rod 2 are respectively fixedly connected to the corresponding connecting parts. The number of the guide rods 2 is two and the two guide rods 2 are respectively connected to the front and rear of the lifting plate.

[0038] In the above-mentioned BMS system, the interior of the connecting part is a hollow cavity, the number of the above-mentioned screw rods 2 is two, the two ends of one of the screw rods are fixedly connected to the transmission gear 1, and the two ends of the other screw rod are fixedly connected to the transmission gear 2, the above-mentioned transmission gear 1 and the transmission gear 2 are both located in the connecting part, and the connecting part also has a transmission chain, and the above-mentioned transmission chain is sleeved on the transmission gear 1 and the transmission gear 2.

[0039] The connector has two functions:

[0040] First, provide enough space for the guide rod 2 and the screw rod 2 to connect;

[0041] Secondly, the cavity inside the connecting part provides enough space for connecting the transmission gear 1, the transmission gear 2 and the transmission chain.

[0042] The utility model also provides a lawn mower, which comprises the BMS system.

[0043] Compared with the prior art, since the BMS modules in this BMS system are centrally arranged on a substrate, the substrate in this system can move up and down, forward and backward, and left and right. Therefore, according to actual conditions, the substrate can be stably extended out of the shell at an appropriate height, which is convenient for inspection and maintenance of the BMS modules on the substrate, and its stability is relatively high.

[0044] At the same time, all components in the system are located in the shell, and its structure is relatively compact, which has high practical value.

[0045] In addition, the base plate and the corresponding front-rear moving components and left-right moving components form a BMS unit, and there are multiple BMS units along the up and down directions of the lifting component. Therefore, more BMS modules can be accommodated in this system, further improving its applicability and compactness. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a three-dimensional structural diagram of the BMS system.

[0047] Figure 2 It is a schematic diagram of the three-dimensional structure of the lifting component in this BMS system.

[0048] Figure 3 It is a schematic diagram of the three-dimensional structure of the lifting component in the BMS system in another direction.

[0049] Figure 4 This is a lawn mower with a BMS system.

[0050] In the figure, 1, shell; 2, base plate; 3, guide rod 1; 4, screw rod 1; 5, driving member 1; 6, lifting plate; 6a, connecting part; 7, guide rod 2; 8, screw rod 2; 9, driving member 2; 10, frame; 11, driving wheel; 12, driven wheel; 13, conveyor belt; 14, driving member 3; 15, transmission gear 1; 16, transmission gear 2; 17, transmission chain. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0052] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly mounted on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0053] 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 "or / and" used herein includes any and all combinations of one or more related listed items.

[0054] Embodiment 1

[0055] like Figure 1 As shown, the lawn mower includes a frame, and the frame has multiple groups of one-to-one corresponding BMS modules and battery packs, and several BMS modules are connected through a CAN bus and a bidirectional converter.

[0056] like Figure 1 and Figure 2 and Figure 3 As shown, the BMS system includes a lifting component, a front-and-rear moving component, a left-and-right moving component, a substrate and a shell 1 with a cavity inside. The substrate 2 is flat and a number of BMS modules are fixedly connected to the substrate 2. The substrate 2 is connected to the upper part of the front-and-rear moving component, the front-and-rear moving component is connected to the upper part of the left-and-right moving component, and the left-and-right moving component is connected to the lifting component. The front-and-rear moving component can drive the substrate 2 to move forward and backward, the left-and-right moving component can drive the front-and-rear moving component to move left and right, and the lifting component can drive the front-and-rear moving component to move up and down.

[0057] The lifting assembly includes a guide rod 3, a screw rod 4, a driving member 5 and a lifting plate 6. The guide rod 3 and the screw rod 4 are both vertically arranged and parallel to each other. The driving member 5 is fixedly connected in the shell 1 and the driving member 5 is connected to the screw rod 4. The guide rod 3 and the screw rod 4 are both penetrated on the lifting plate 6 and the screw rod 4 is threadedly connected to the lifting plate 6. The upper part of the lifting plate 6 is used to connect the left and right moving assembly and the front and back moving assembly.

[0058] The driving member 5 is a motor, and the rotating shaft of the motor is connected to the screw rod 4.

[0059] There are two guide rods 3 and they are arranged in parallel. The screw rod 4 is located between the two guide rods 3.

[0060] The left-right moving assembly includes a guide rod 2 7, a screw rod 2 8, a driving member 2 9 and a frame 10. The guide rod 2 7 and the screw rod 2 8 are horizontally arranged. The guide rod 2 7 and the screw rod 2 8 are both passed through the lower part of the frame 10 and the screw rod 2 8 is threadedly connected to the frame 10. The driving member 2 9 is connected to the screw rod 4. The upper part of the frame 10 is used to connect the front-back moving assembly.

[0061] There are two guide rods 7 and they are arranged in parallel. The screw rod 8 is located between the two guide rods 7 .

[0062] The second driving member 9 is a rocker fixedly connected to the end of the second screw rod 8.

[0063] The forward and backward moving assembly includes a driving wheel 11, a driven wheel 12, a conveyor belt 13 and a driving member 3 14. The driving wheel 11 and the driven wheel 12 are respectively connected to the front and rear ends of the frame 10, the conveyor belt 13 is sleeved on the driving wheel 11 and the driven wheel 12, and the driving member 3 14 is fixedly connected in the frame 10 and the driving member 3 14 is connected to the driving wheel 11.

[0064] The driving member 3 14 is a motor, and the rotating shaft of the motor is connected to the driving wheel 11.

[0065] Both ends of the lifting plate 6 have a protruding connection portion 6a, and both ends of the above-mentioned guide rod 2 7 are respectively fixedly connected to the corresponding connection portion 6a. The number of the guide rod 2 7 is two and the two guide rods 2 7 are respectively connected to the front and rear of the lifting plate 6.

[0066] The interior of the connecting portion 6a is a hollow cavity, and there are two screw rods 8. The end of one screw rod 8 is fixedly connected to a transmission gear 15, and the end of the other screw rod 8 is fixedly connected to a transmission gear 2 16. The transmission gear 15 and the transmission gear 2 16 are both located in the connecting portion 6a. The connecting portion 6a also has a transmission chain 17, and the transmission chain 17 is sleeved on the transmission gear 15 and the transmission gear 2 16.

[0067] This BMS system creatively connects the BMS module to the base plate.

[0068] The lifting assembly can drive the substrate to move up and down stably, the front and rear moving assembly can drive the substrate to move left and right stably, and the left and right moving assembly can drive the substrate to move forward and backward stably.

[0069] That is, the substrate is located in the housing in the initial state. When the BMS system needs to be repaired and maintained, the lifting assembly, the front and rear swing assembly and the left and right moving assembly cooperate to finally extend the substrate with the BMS module out of the housing at a suitable height.

[0070] Of course, the side of the shell is open and there is a door that can be opened and closed at the opening of the shell. The door needs to be opened during the inspection and maintenance operation.

[0071] Embodiment 2

[0072] This embodiment is based on the technical solution of the first embodiment, and applies the BMS system to a lawn mower.

[0073] The batteries on the lawn mower are managed in an orderly manner through the BMS system, thereby improving the stability of the lawn mower during operation.

[0074] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, appropriate changes and modifications to the above embodiments are within the scope of protection required by the present invention.

Claims

1. A BMS system, a lawn mower includes a frame, the frame has multiple sets of one-to-one corresponding BMS modules and battery packs, and the multiple BMS modules are connected through a CAN bus and a bidirectional converter, characterized in that: The BMS system includes a lifting component, a front-and-rear moving component, a left-and-right moving component, a base plate and a shell with a cavity inside. The base plate is in a flat plate shape and a plurality of BMS modules are fixedly connected to the base plate. The base plate is connected to the upper part of the front-and-rear moving component, the front-and-rear moving component is connected to the upper part of the left-and-right moving component, and the left-and-right moving component is connected to the lifting component. The front-and-rear moving component can drive the base plate to move forward and backward, the left-and-right moving component can drive the front-and-rear moving component to move left and right, and the lifting component can drive the front-and-rear moving component to move up and down.

2. The BMS system according to claim 1, characterized in that: The lifting assembly includes a guide rod, a screw rod, a driving member and a lifting plate. The guide rod and the screw rod are both vertically arranged and parallel to each other. The driving member is fixedly connected in the shell and the driving member is connected to the screw rod. The guide rod and the screw rod are both passed through the lifting plate and the screw rod is threadedly connected to the lifting plate. The upper part of the lifting plate is used to connect the left and right moving assembly and the front and back moving assembly.

3. The BMS system according to claim 2, characterized in that: The driving member 1 is a motor, and the rotating shaft of the motor is connected to the screw rod 1.

4. The BMS system according to claim 3, characterized in that: The number of the guide rods 1 is two and the two are arranged in parallel, and the screw rod 1 is located between the two guide rods 1.

5. The BMS system according to claim 4, characterized in that: The left and right moving assembly includes two guide rods, two screw rods, two driving members and a frame. The two guide rods and the two screw rods are horizontally arranged. The two guide rods and the two screw rods are both passed through the lower part of the frame and the screw rods are threadedly connected to the frame. The two driving members are connected to the screw rods. The upper part of the frame is used to connect the front and rear moving assembly.

6. The BMS system according to claim 5, characterized in that: There are two guide rods 2 and the two guide rods 2 are arranged in parallel, and the screw rod 2 is located between the two guide rods 2.

7. The BMS system according to claim 6, characterized in that: The second driving member is a rocker fixedly connected to the two ends of the screw rod.

8. The BMS system according to claim 7, characterized in that: The forward and backward moving assembly includes a driving wheel, a driven wheel, a conveyor belt and a driving member 3, wherein the driving wheel and the driven wheel are respectively connected to the front and rear ends of the frame, the conveyor belt is sleeved on the driving wheel and the driven wheel, and the driving member 3 is fixedly connected in the frame and the driving member 3 is connected to the driving wheel.

9. The BMS system according to claim 8, characterized in that: The third driving member is a motor, and the rotating shaft of the motor is connected to the driving wheel.

10. A lawn mower, characterized in that: The lawn mower comprises the BMS system according to any one of claims 1-9.

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