3.7-degree starting and parking integrated iron-lithium battery

Abstract

The utility model relates to a 3.7-degree start-stop integrated lithium iron battery which comprises a battery box provided with an external positive electrode and an external negative electrode, a power lithium battery core group, a power protection plate, a passive equalizer, a positive electrode cable and a negative electrode cable are arranged in the battery box, and the power lithium battery core group and the passive equalizer are both connected with the power protection plate; the cathode cable is connected between the power protection plate and an external cathode on the battery box; and the positive electrode cable is connected between the positive electrode of the power lithium battery core group and the external positive electrode on the battery box. The device is reasonable in design, the power lithium battery core group, the power protection plate and the passive equalizer are combined, the mass of the lithium battery is smaller than that of a lead-acid battery, the service time is doubled, and the problem that power generated by a vehicle generator is not enough to be used by a parking air conditioner can be solved.

Description

Technical Field

[0001] This utility model relates to a 3.7-degree start-stop integrated lithium iron phosphate battery. Background Technology

[0002] Currently, parking air conditioners in vehicles are air conditioning systems powered by batteries or other devices when the vehicle is parked and the engine is off. They supplement traditional air conditioning and are widely used in heavy-duty trucks. Generally, parking air conditioners in gasoline-powered vehicles have independent compressors and cooling fans, powered by the vehicle's battery. Therefore, parking air conditioners must have battery voltage protection during operation. However, these batteries are usually lead-acid batteries, which have disadvantages such as small capacity, heavy size, poor low-temperature performance, short cycle life, low energy density, and inability to withstand high-current charging and discharging, making them unsuitable for more than ten hours of use. Utility Model Content

[0003] This utility model addresses the problems existing in the prior art by providing a 3.7-degree start-stop integrated lithium iron phosphate battery.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a 3.7-degree start-stop integrated lithium iron phosphate battery, comprising a battery box with an external positive electrode and an external negative electrode. The battery box contains a power lithium battery cell assembly, a power protection board, a passive equalizer, a positive electrode cable, and a negative electrode cable. The power lithium battery cell assembly and the passive equalizer are both connected to the power protection board. The negative electrode cable connects the power protection board to the external negative electrode on the battery box. The positive electrode cable connects the positive electrode of the power lithium battery cell assembly to the external positive electrode on the battery box.

[0005] Furthermore, the battery box includes a box body and a box cover disposed on the upper end of the box body. The power lithium battery cell assembly is disposed inside the box body. A grid plate is disposed on the upper end of the inner side of the box body. The power protection plate and the passive equalizer are both mounted on the grid plate.

[0006] Furthermore, both the external positive and external negative terminals are located on the cover, which also includes a power switch and a fuse, with the fuse connected to the external negative terminal.

[0007] Furthermore, it also includes a forced start cable, one end of which is connected to the power protection board, and the other end of which is connected to a forced start external connection wire that extends out of the battery box. The forced start external connection wire is used to connect to an external negative terminal.

[0008] Furthermore, the power lithium battery cell assembly includes two sets of power lithium battery packs connected in series. Each set of power lithium battery packs includes four power lithium batteries arranged in an array. Adjacent power lithium batteries are separated by an insulating plate and connected in series by a connecting piece. The positive and negative electrodes of the power lithium battery cell assembly are provided with connecting piece terminals.

[0009] Furthermore, both the connecting piece and the connecting piece terminal are laser welded.

[0010] Furthermore, the power lithium battery uses lithium iron phosphate cells and has a capacity of 150AH.

[0011] Furthermore, the box body is made of stainless steel, and the lid is locked to the box body by evenly distributed fastening bolts.

[0012] Furthermore, the inner side of the box cover is provided with several reinforcing ribs.

[0013] Compared with the prior art, the present invention has the following advantages: The present invention is reasonably designed and adopts a combination of power lithium battery cell pack, power protection board and passive equalizer. The lithium battery is lighter and has twice the service time than lead-acid battery, which can alleviate the problem of insufficient power generation from vehicle generator to power parking air conditioner. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the battery box being opened in an embodiment of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the box body in an embodiment of this utility model;

[0016] Figure 3 yes Figure 2 A schematic diagram of the structure of the box is omitted.

[0017] Figure 4 This is a top view of the box lid in an embodiment of this utility model;

[0018] Figure 5 This is a bottom view of the box lid in an embodiment of this utility model;

[0019] Figure 6 This is a three-dimensional structural diagram of the power lithium battery cell assembly in an embodiment of this utility model;

[0020] Figure 7 This is a schematic diagram of a laser welding machine welding the battery busbar of a power lithium battery cell pack.

[0021] Figure 8 This is a top view schematic diagram of the power lithium battery cell assembly in an embodiment of this utility model;

[0022] Figure 9 This is a top view of the power lithium battery cell assembled inside the box in an embodiment of this utility model;

[0023] Figure 10 This is a partial disassembly diagram of the power lithium battery cell assembly in an embodiment of this utility model;

[0024] Figure 11 This is a schematic diagram of the disassembled state of the power lithium battery pack in an embodiment of this utility model;

[0025] Figure 12 This is a schematic diagram of the usage state of this utility model on a truck in an embodiment of the present invention.

[0026] In the picture:

[0027] 1-First power lithium battery; 2-First insulating plate; 3-Second power lithium battery; 4-Second insulating plate; 5-Third power lithium battery; 6-Third insulating plate; 7-Fourth power lithium battery; 8-First power lithium battery pack; 9-Second power lithium battery pack; 10-First connecting piece; 11-Second connecting piece; 12-Third connecting piece; 13-Seventh connecting piece; 14-Sixth connecting piece; 15-Fifth connecting piece; 16-Fourth connecting piece; 17-Negative electrode connecting piece terminal; 18-Positive electrode connecting piece terminal; 19-Box body; 20-Grate plate; 21-Power protection plate; 22- Passive equalizer; 23-Fixing plate; 24-Protective plate; 25-First negative cable; 26-Second negative cable; 27-Positive cable; 28-Second locking terminal; 29-Third locking terminal; 30-Cover; 31-Bolt; 32-Fastening bolt; 33-Power switch; 34-External positive terminal; 35-External negative terminal; 36-Fuse; 37-Reinforcing rib; 38-Laser welding machine; 39-Forced start cable; 40-First locking terminal; 41-Forced start external connection wire; 42-Integrated start-stop lithium iron phosphate battery; 43-Truck; 44-Battery box; 45-Power lithium battery cell pack. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] like Figures 1-12 As shown, this utility model discloses a 3.7 kWh integrated start-stop lithium iron phosphate battery with a storage capacity of 3.7 kWh. Its structure includes a battery box with an external positive electrode 34 and an external negative electrode 35. Inside the battery box are a power lithium battery cell assembly 45, a power protection board 21, a passive equalizer 22, a positive cable 27, and a negative cable. The negative electrode of the power lithium battery cell assembly 45 is connected to the power protection board 21, and the passive equalizer 22 is also connected to the power protection board 21. The negative cable connects the power protection board 21 to the external negative electrode 35 on the battery box. The positive cable 27 connects the positive electrode of the power lithium battery cell assembly 45 to the external positive electrode 34 on the battery box. By combining the power lithium battery cell assembly, power protection board, and passive equalizer, the lithium battery is lighter than a lead-acid battery and has double the usage time, alleviating the problem of insufficient generator power for parking air conditioning in vehicles.

[0031] In this embodiment, the battery box includes a box body 19 and a box cover 30 disposed on the upper end of the box body 19. The box cover is used to seal the top opening of the box body. The power lithium battery cell assembly 45 is disposed inside the box body 19. A grid plate 20 is disposed on the upper end of the interior of the box body 19. The power protection board 21 and the passive equalizer 22 are both mounted on the grid plate 20. The power protection board 21 is fixed to the grid plate 20 by a fixing piece 23. The grid plate 20 is used to block the power lithium battery cell assembly 45 from the control board, power protection board 21, and passive equalizer 22.

[0032] In this embodiment, both the external positive electrode 34 and the external negative electrode 35 are disposed on the cover 30. The cover 30 is also provided with a power switch 33 and a fuse 36. The power switch 33 is used to start the device, and the fuse 36 is connected to the external negative electrode 35 through a fastening bolt 32.

[0033] This embodiment also includes a forced start cable 39. One end of the forced start cable 39 is fixed to the power protection board 21 via a first locking terminal 40, and the other end of the forced start cable 39 is connected to a forced start external connection wire 41 that extends out of the battery box. The forced start external connection wire 41 is used to connect to the external negative terminal 35. When the vehicle experiences a power protection board 21 failure or a vehicle alternator failure, connecting the forced start external connection wire 41 to the external negative terminal 35 can prevent the vehicle from breaking down and allow it to continue normal operation. This forced start method uses a physical switch to prevent breakdowns, and another cable outside the box connects to the passive balance board and the lithium battery pack. This ensures that the battery can charge and discharge normally without breaking down the load, thus preventing the vehicle from breaking down on the road. If the alternator fails, this wire can be used directly to connect to the external negative terminal, bypassing the protection board. Even if the protection board fails or the alternator stops charging, it will bypass the protection board and continue operating during low voltage protection.

[0034] In this embodiment, the power lithium battery cell pack 45 includes two sets of power lithium battery packs connected in series. The two sets of power lithium battery packs are distributed left and right. Each set of power lithium battery packs includes four power lithium batteries arranged in an array. Adjacent power lithium batteries are separated by an insulating plate. The specific structure of each set of power lithium battery packs is as follows: first power lithium battery 1, first insulating plate 2, second power lithium battery 3, second insulating plate 4, third power lithium battery 5, third insulating plate 6, and fourth lithium battery 7.

[0035] Adjacent power lithium batteries are connected in series via connecting pieces; both the positive and negative terminals of the power lithium battery cell assembly 45 are provided with connecting piece terminals. Specifically, the two power lithium battery groups are a first power lithium battery group 8 and a second power lithium battery group 9. In the first power lithium battery group 8, the negative terminal of the first power lithium battery 1 serves as the negative terminal of the entire power lithium battery cell assembly 45 and is provided with a negative terminal connecting piece 17. The positive terminal of the first power lithium battery 1 is connected to the negative terminal of the second power lithium battery 3 via a first connecting piece 10. The positive terminal of the second power lithium battery 3 is connected to the negative terminal of the third power lithium battery 5 via a second connecting piece 11. The positive terminal of the third power lithium battery 5 is connected to the negative terminal of the fourth power lithium battery 7 via a third connecting piece 12. The second power lithium battery pack 9 has its first power lithium battery 1's positive electrode serving as the positive electrode of the entire power lithium battery cell pack 45, and is equipped with a positive electrode connection terminal 18. The negative electrode of the first power lithium battery 1 is connected to the positive electrode of the second power lithium battery 3 via a fourth connection 16. The negative electrode of the second power lithium battery 3 is connected to the positive electrode of the third power lithium battery 5 via a fifth connection 15. The negative electrode of the third power lithium battery 5 is connected to the positive electrode of the fourth power lithium battery 7 via a sixth connection 14. In the entire power lithium battery cell pack 45, the positive electrode of the fourth power lithium battery 7 of the first power lithium battery pack 8 and the negative electrode of the fourth power lithium battery 7 of the second power lithium battery pack 9 are connected to 13 via a seventh connection 13.

[0036] In this embodiment, both the connecting piece and its terminals are laser-welded, i.e., the battery busbar is welded using a laser welding machine 38. Laser welding at the connecting piece effectively prevents welding slag from splattering onto the lithium battery pack and posing a safety hazard.

[0037] In this embodiment, the power lithium battery uses lithium iron phosphate cells, and the capacity of a single power lithium battery is 150AH.

[0038] In this embodiment, there are two negative cables: a first negative cable 25 and a second negative cable 26. The first negative cable 25 is connected between the negative terminal of the power lithium battery cell assembly 45 and the power protection board 21. The second negative cable 26 is connected between the power protection board 21 and the external negative terminal 35. Specifically, the first negative cable 25 is fixed to the power protection board 21 via a second locking terminal 28, and the second negative cable 26 is fixed to the power protection board 21 via a third locking terminal 29. The positive cable 27 is connected to the positive terminal connector.

[0039] In this embodiment, the housing 19 is made of stainless steel, and the cover 30 is secured to the housing 19 by evenly distributed fastening bolts 32. Furthermore, the cable inside the housing 19 connects to the power interface inside the cover, and the external positive terminal 34 and external negative terminal 35 on the cover are used to connect and use a discharge device.

[0040] In this embodiment, the inner side of the lid 30 is provided with a plurality of reinforcing ribs 37 to increase the strength of the lid.

[0041] In this embodiment, as Figure 12 As shown, in practical applications, the 3.7-degree start-stop integrated lithium iron phosphate battery is placed in the battery box 44 at the rear of the truck 43 to operate; it can not only power the air conditioner in the truck compartment, but also power other electrical appliances.

[0042] In this embodiment, the power protection board 21 is used for active balancing, while the passive equalizer 22 is used during the continuous charging and discharging process of the battery. Current flows through the passive equalizer 22 to make each battery group more balanced. Balancing means balancing the voltage, which means making the cells in each group more even. When the charging process is complete, the voltage of each group becomes even. It will gradually wear down each voltage, so that one voltage is not higher than another. In this way, the voltage of each battery group will be averaged out, avoiding vehicle load shedding.

[0043] Specific implementation process:

[0044] The first power lithium battery 1, the first insulating plate 2, the second power lithium battery 3, the second insulating plate 4, the third power lithium battery 5, the third insulating plate 6, and the fourth power lithium battery 7 are combined to form the first power lithium battery pack 8 and the second power lithium battery pack 9. The first connecting piece 10, the second connecting piece 11, the third connecting piece 12, the seventh connecting piece 13, the sixth connecting piece 14, the fifth connecting piece 15, the fourth connecting piece 16, the negative electrode connecting piece terminal 17, and the positive electrode connecting piece terminal 18 are arranged sequentially in the first power lithium battery pack 8 and the second power lithium battery pack 9. After being arranged neatly, the battery busbars are welded by a laser welding machine 38. After welding, the battery pack is placed into the housing 19, and the grid plate 20 is then locked into the housing 19. The power protection plate 21 and the passive equalizer 22 are fixed on its upper end. The fixing piece 23 is used to fix the power protection plate 21. The first negative cable 25 is fixed to the power protection plate 21 through the second locking terminal 28, and the second negative cable 26 is fixed to the power protection plate 21 through the third locking terminal 29. The positive cable 27 is connected to the positive connecting piece terminal 18. After locking, the other end of the second negative cable 26 and the positive cable 27 are connected to the external positive terminal 34 and the external negative terminal 35 on the housing cover 30. The external positive terminal 34 and the external negative terminal 35 are used to connect and use discharge equipment. The start-up cable 39 is fixed to the power protection board 21 via the first locking terminal 40, while the start-up external jumper cable 41 extends out of the box 19. When the power protection board 21 or the vehicle alternator malfunctions, connecting the start-up external jumper cable 41 to the external negative terminal 35 can prevent the vehicle from breaking down and allow it to continue normal operation. The start-stop integrated lithium iron phosphate battery 42 operates by being placed inside the battery box 44 at the rear of the truck 43.

[0045] The advantages of this utility model are: it can alleviate the problem of insufficient generator power in vehicles to supply parking air conditioning; lithium batteries are lighter and have double the service life compared to lead-acid batteries; by arranging individual 150AH lithium batteries in 8 series of 24V to form a lithium battery pack, a passive equalizer ensures that each battery is used evenly and in a balanced manner during vehicle discharge, avoiding load dumping; the laser welding at the connection point can effectively prevent welding slag from being left in the lithium battery pack, thus avoiding potential safety hazards; and a strong start function is added.

[0046] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured using a casting process) (except where it is obviously impossible to use an integral forming process).

[0047] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.

[0048] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A 3.7-degree start-up integrated lithium iron phosphate battery, comprising a battery case with an external positive electrode and an external negative electrode, characterized in that: The battery box contains a power lithium battery cell assembly, a power protection board, a passive equalizer, a positive cable, and a negative cable. The power lithium battery cell assembly and the passive equalizer are both connected to the power protection board. The negative cable connects the power protection board to the external negative terminal on the battery box. The positive cable connects the positive terminal of the power lithium battery cell assembly to the external positive terminal on the battery box.

2. The 3.7-degree start-stop integrated lithium iron phosphate battery according to claim 1, characterized in that: The battery box includes a box body and a box cover disposed on the upper end of the box body. The power lithium battery cell assembly is disposed inside the box body. A grid plate is disposed on the upper end of the inner side of the box body. The power protection board and the passive equalizer are both mounted on the grid plate.

3. A 3.7-degree start-up integrated lithium iron phosphate battery according to claim 2, characterized in that: Both the external positive and negative terminals are located on the cover. The cover also has a power switch and a fuse, with the fuse connected to the external negative terminal.

4. A 3.7-degree start-stop integrated lithium iron phosphate battery according to claim 1, characterized in that: It also includes a start-up cable, one end of which is connected to the power protection board, and the other end of which is connected to a start-up external connection wire that passes through the battery box. The start-up external connection wire is used to connect to an external negative terminal.

5. A 3.7-degree start-stop integrated lithium iron phosphate battery according to claim 1, characterized in that: The power lithium battery cell assembly includes two sets of power lithium battery packs connected in series. Each set of power lithium battery packs includes four power lithium batteries arranged in an array. Adjacent power lithium batteries are separated by an insulating plate and connected in series by a connecting piece. The positive and negative electrodes of the power lithium battery cell assembly are provided with connecting piece terminals.

6. A 3.7-degree start-up integrated lithium iron phosphate battery according to claim 5, characterized in that: Both the connecting piece and the connecting piece terminal are laser welded.

7. A 3.7-degree start-up integrated lithium iron phosphate battery according to claim 5, characterized in that: The power lithium battery uses lithium iron phosphate cells and has a capacity of 150AH.

8. A 3.7-degree start-up integrated lithium iron phosphate battery according to claim 2, characterized in that: The box body is made of stainless steel, and the lid is locked to the box body by evenly distributed fastening bolts.

9. A 3.7-degree start-stop integrated lithium iron phosphate battery according to claim 2, characterized in that: The inner side of the box lid is provided with several reinforcing ribs.

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