A 12V start-stop battery system for the LN1 series

Abstract

The present invention relates to the technical field of automotive start-stop, and discloses a 12V start-stop battery system for the LN1 series, including a housing, a cover body cooperating with the housing, and a power supply structure. A positive pole column and a negative pole column are provided through the cover body and are hermetically connected to the cover body. The end portions of the positive pole column and the negative pole column located in the housing are respectively electrically connected to the power supply structure. The system further includes: a relay for controlling the formation of a path or an open circuit between the positive pole column and the power supply structure; a shunt for detecting the current value passing through the negative pole column; a battery controller to which the power supply structure, the relay, and the shunt are respectively electrically connected; and a communication interface which passes through the cover body and is hermetically connected to the cover body, and the communication interface is electrically connected to the battery controller. The present invention has better use effects.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive start-stop technology, and particularly to a 12V start-stop battery system for the LN1 series. Background Art

[0002] In response to the increasingly stringent automotive environmental protection regulations, vehicle manufacturers conduct investigations based on the operating conditions of the entire vehicle. In urban areas, there are many red lights, and sometimes the waiting time for red lights is even longer than the driving time. To address this situation, the automotive industry has developed an automatic start-stop system to reduce unnecessary engine idling, saving fuel and reducing emissions.

[0003] Specifically, this start-stop system is called an Idle-stop system. A main reinforced starter and a 12V lithium-ion start-stop battery are used to frequently start the engine. Since this method is not very different from the ordinary vehicle starting method, the 12V lithium-ion start-stop battery and the starter need to withstand greater pressure, and at the same time, more sensors and controllers are required for detection and control. The most important thing in this method is to strengthen the starter and the 12V lithium-ion start-stop battery.

[0004] Most of these start-stop systems use a disengaging and engaging starter, that is, each time the starter gear needs to be engaged with the flywheel, increasing the working pressure of the starter. Therefore, when starting, it is necessary to wait for the engine speed to drop to zero (some start-stop systems use a constantly engaged starter, and the engine can be started at any speed without the engine speed dropping to zero). The starter and the 12V lithium-ion start-stop battery need to enhance their durability. Therefore, for vehicles equipped with such a start-stop system, their starters and 12V lithium-ion start-stop batteries are more durable than traditional starters, and the service life can reach 300,000 times. In addition, the 12V lithium-ion start-stop battery also needs to be specially strengthened to enable it to charge and discharge quickly, and at the same time, it needs to have a high capacity to handle the operation of in-vehicle electrical appliances when the engine is stopped, and be able to cope with frequent start-stop conditions.

[0005] However, ordinary lead-acid batteries cannot discharge a large current multiple times in a short period. Their separators cannot allow ions to pass quickly, resulting in poor use effects. Summary of the Invention

[0006] The purpose of the present invention is to provide a 12V start-stop battery system for the LN1 series, aiming to solve the problem of poor use effects.

[0007] The above technical object of the present invention is achieved by the following technical solutions: A 12V start-stop battery system for the LN1 series, including a housing, a cover body cooperating with the housing, and a power supply structure. A positive electrode column and a negative electrode column are provided through the cover body and are hermetically connected to the cover body. The end portions of the positive electrode column and the negative electrode column located in the housing are respectively electrically connected to the power supply structure. It further includes:

[0008] A relay for controlling the formation of a path or an open circuit between the positive electrode column and the power supply structure;

[0009] A shunt for detecting the current value passing through the negative electrode column;

[0010] A battery controller, to which the power supply structure, the relay, and the shunt are respectively electrically connected;

[0011] A communication interface, which passes through the cover body and is hermetically connected to the cover body, and is electrically connected to the battery controller.

[0012] The further setting of the present invention is: The power supply structure includes a U-shaped battery rack, a carrier plate, two limiting plates, a plurality of electrode rows, and a plurality of battery cells. The two limiting plates are located on both sides of the battery rack and form a cover-like structure with the battery rack. A plurality of the battery cells are all located in the cover-like structure. All the electrode rows are connected to the carrier plate. The battery cells pass through the carrier plate and are electrically connected to the electrode rows. One electrode row is electrically connected to the relay, and the other electrode row is electrically connected to the shunt. Both ends of the battery rack respectively abut against the carrier plate and the housing. The limiting plate is fixedly connected to the cover body.

[0013] The further setting of the present invention is: There are eight battery cells. The nth battery cell and the (n + 1)th battery cell form a cell group. The two battery cells in the same cell group are connected in parallel. Any two adjacent cell groups are connected in series, where n = 1, 3, 5, 7. A buffer foam layer is provided between any two adjacent battery cells.

[0014] The further setting of the present invention is: Each cell group is electrically connected to the battery controller.

[0015] The further setting of the present invention is: It further includes a plurality of positioning screws. The positioning screws pass through the limiting plate and are threadedly connected to the cover body. A positioning nut is provided at the end of the positioning screw away from the cover body. The positioning nut abuts against the limiting plate.

[0016] A further setting of the present invention is that: a plurality of ventilation holes facing the battery cells are formed in the carrier plate, a first explosion-proof valve is arranged in the ventilation holes, a pressure relief pipe is arranged through the cover body and is hermetically connected with the cover body, and a second explosion-proof valve is arranged in the pressure relief pipe.

[0017] A further setting of the present invention is that: a plurality of mass-reducing holes penetrating through the limiting plate are formed in the limiting plate, and both ends of the mass-reducing holes are located outside the battery rack.

[0018] A further setting of the present invention is that: four protruding parts are arranged on both sides of the battery rack, and both sides of each limiting plate respectively abut against two of the protruding parts.

[0019] A further setting of the present invention is that: an annular connection groove is formed in the cover body, one side of the housing close to the cover body is matched with the connection groove, and the housing and the cover body are connected by hot melt sealing or glue sealing.

[0020] A further setting of the present invention is that: the communication interface is a Lin interface or a Can interface.

[0021] The beneficial effects of the present invention are as follows: A 12V start-stop battery system for the LN1 series is provided. By directly replacing the 12V lead-acid battery in a conventional fuel vehicle with this start-stop battery system, it can be directly used to start the engine and various electrical components on the vehicle. In this way, firstly, a lot of mass can be saved in the overall battery, thereby realizing the lightweight of the vehicle. Moreover, it has a high start-stop life, can be quickly charged and discharged, and has a large start-stop power, and can better meet the harsh start-stop working conditions of the vehicle's start-stop system. At the same time, when the start-stop battery of the present application starts the vehicle, it directly starts the engine, and then the engine drives the vehicle to move. While for a conventional 48V start-stop battery, when initially starting the vehicle, it needs to first drive the vehicle to move through the battery. In actual production, an additional motor cooperating with the 48V start-stop battery needs to be set. However, with the start-stop battery system of the present application, the motor cooperating with the 48V start-stop battery is not required, which not only makes the input cost lower, but also further improves the lightweight effect.

[0022] During use, the battery controller (also called BMS) monitors the state of the power supply structure, including temperature, voltage, and current (both voltage and temperature are monitored through conventional sensors). At the same time, the battery controller is also connected to the vehicle's computer through the communication interface, used to receive commands sent by the vehicle, and also used to send various signals of the battery system to the vehicle computer after receiving them.

[0023] Among them, the external structure formed by the housing and the cover is the same as or very close to that of the lead-acid battery of the LN1 series on the current market (including the size and tolerance of the positive and negative terminals, the shapes of the housing and the cover, and the overall fixing method of the battery system, etc.). Therefore, the start-stop battery system of this application can directly replace the original lead-acid battery during actual use without the need to modify the structure of the vehicle; at the same time, the connection and fixing method of the battery start-stop system to the vehicle body are also the same as those of the conventional lead-acid battery (meeting national standards). Therefore, even without description, it does not affect the clarity of the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 FIG. is a schematic structural diagram of an embodiment of a 12V start-stop battery system for the LN1 series of the present invention;

[0026] Figure 2 FIG. is an exploded view of an embodiment of a 12V start-stop battery system for the LN1 series of the present invention;

[0027] Figure 3 FIG. is a schematic structural diagram of an embodiment of the cover in a 12V start-stop battery system for the LN1 series of the present invention;

[0028] Figure 4 FIG. is an exploded view of an embodiment of the power supply structure in a 12V start-stop battery system for the LN1 series of the present invention;

[0029] Figure 5 FIG. is a schematic diagram of the principle of a 12V start-stop battery system for the LN1 series of the present invention.

[0030] In the figures, 1, housing; 2, cover; 3, positive terminal; 4, negative terminal; 5, relay; 6, shunt; 7, battery controller; 8, communication interface; 9, battery rack; 10, carrier board; 11, limiting board; 12, electrode row; 13, battery cell; 14, buffer foam layer; 15, positioning screw; 16, positioning nut; 17, vent hole; 18, pressure relief pipe; 19, mass reduction hole; 20, protruding part; 21, connecting groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work belong to the scope of protection of the present invention.

[0032] A 12V start-stop battery system for the LN1 series, as Figures 1 to 5 shown, includes a housing 1, a cover 2 cooperating with the housing 1, and a power supply structure. A positive terminal 3 and a negative terminal 4 are provided through the cover 2 and are sealingly connected to the cover 2. The end portions of the positive terminal 3 and the negative terminal 4 located in the housing 1 are electrically connected to the power supply structure respectively. It further includes:

[0033] A relay 5, which is used to control the formation of a path or an open circuit between the positive terminal 3 and the power supply structure;

[0034] A shunt 6, which is used to detect the current value passing through the negative terminal 4;

[0035] A battery controller 7, to which the power supply structure, the relay 5, and the shunt 6 are electrically connected respectively;

[0036] A communication interface 8, which passes through the cover 2 and is sealingly connected to the cover 2, and the communication interface 8 is electrically connected to the battery controller 7.

[0037] The power supply structure includes a U-shaped battery holder 9, a carrier board 10, two limiting plates 11, a plurality of electrode rows 12, and a plurality of battery cells 13. The two limiting plates 11 are located on both sides of the battery holder 9 and form a cover-like structure with the battery holder 9. A plurality of the battery cells 13 are all located in the cover-like structure. All the electrode rows 12 are connected to the carrier board 10. The battery cells 13 pass through the carrier board 10 and are electrically connected to the electrode rows 12. One electrode row 12 is electrically connected to the relay 5, and the other electrode row 12 is electrically connected to the shunt 6. The two ends of the battery holder 9 are in contact with the carrier board 10 and the housing 1 respectively. The limiting plates 11 are fixedly connected to the cover 2.

[0038] There are eight battery cells 13 provided. The nth battery cell 13 and the (n + 1)th battery cell 13 form a cell group. Two battery cells 13 in the same cell group are connected in parallel, and any two adjacent cell groups are connected in series, where n = 1, 3, 5, 7. A buffer foam layer 14 is provided between any two adjacent battery cells 13; of course, other numbers of battery cells 13 and other combination (including series and parallel) methods can also be selected according to actual situations. Each cell group is electrically connected to the battery controller 7, so that the battery controller 7 can detect the state of each cell group.

[0039] There are also a number of positioning screws 15. The positioning screws 15 pass through the limiting plate 11 and are threadedly connected to the cover body 2. A positioning nut 16 is provided at the end of the positioning screw 15 away from the cover body 2, and the positioning nut 16 abuts against the limiting plate 11. A number of mass-reducing holes 19 penetrating the limiting plate 11 are provided on the limiting plate 11, and both ends of the mass-reducing hole 19 are located outside the battery rack 9. Four protruding parts 20 are provided on both sides of the battery rack 9, and both sides of each limiting plate 11 abut against two of the protruding parts 20 respectively.

[0040] A number of ventilation holes 17 facing the battery cells 13 are provided on the carrier plate 10. A first explosion-proof valve is provided in the ventilation holes 17. A pressure relief pipe 18 is provided passing through the cover body 2 and sealingly connected to the cover body 2. A second explosion-proof valve is provided in the pressure relief pipe 18 (both the first explosion-proof valve and the second explosion-proof valve are common explosion-proof valves for lithium batteries on the market, and they can be welded and fixed by ultrasonic waves). An annular connection groove 21 is provided on the cover body 2. One side of the housing 1 close to the cover body 2 is matched with the connection groove 21, and the housing 1 and the cover body 2 are connected by hot melt sealing or glue sealing. The communication interface 8 is a Lin interface or a Can interface, which is mainly determined by the structure of the vehicle itself whether to select a Lin interface or a Can interface.

[0041] A 12V start-stop battery system for the LN1 series provided by the present invention directly replaces the 12V lead-acid battery in a conventional fuel vehicle and is directly used to start the engine and various electrical components in the vehicle. In this way, a lot of mass can be saved in the overall battery, thus realizing the lightweight of the vehicle. Moreover, it has a high start-stop life, can quickly charge and discharge, and has a large start-stop power, and can better meet the harsh start-stop conditions of the vehicle's start-stop system. At the same time, when the start-stop battery of this application starts the vehicle, it directly starts the engine, and then the engine drives the vehicle to move. While the conventional 48V start-stop battery needs to first drive the vehicle to move when initially starting the vehicle, so in actual production, an additional motor cooperating with the 48V start-stop battery needs to be set. However, with the start-stop battery system of this application, the motor cooperating with the 48V start-stop battery is not required, which not only makes the input cost lower, but also further improves the lightweight effect.

[0042] During use, the battery controller 7 (also known as BMS) monitors the state of the power supply structure, including temperature, voltage, and current (both voltage and temperature are monitored through conventional sensors). At the same time, the battery controller 7 is also connected to the vehicle's computer through the communication interface 8, used to receive commands issued by the vehicle, and also used to send various signals of the battery system to the vehicle computer after receiving them.

[0043] Among them, the outer shape structure formed by the housing 1 and the cover 2 is the same as or very close to the outer shape of the LN1 series lead-acid battery on the current market (including the dimensions and tolerances of the positive electrode post 3 and the negative electrode post 4, the shapes of the housing 1 and the cover 2, and the overall fixing method of the battery system, etc. At the same time, the positive electrode post 3 and the negative electrode post 4 both have an anti-reverse-polarity structure and polarity markings that conform to GB-T5008). Therefore, the start-stop battery system of this application can directly replace the original lead-acid battery during actual use without the need to modify the vehicle's structure. At the same time, the connection and fixing method of the battery start-stop system to the vehicle body are also the same as those of the conventional lead-acid battery (meeting the national standard). Therefore, even without description, it does not affect the clarity of the expression.

[0044] The battery cell 13 and the buffer foam layer 14 are stacked layer by layer. Therefore, firstly, the soft buffer foam layer 14 can play a role in supporting and buffering the battery cell 13, preventing the battery cell 13 from being subjected to large impacts or squeezes under the action of inertia. At the same time, as the usage time increases, if the battery cell 13 expands, the buffer foam layer 14 can also deform so that the battery cell 13 can deform normally without generating excessive pressure and damaging the entire battery system. The positioning screw 15 passes through the limiting plate 11 and is threadedly fixed to the cover body 2, and at the same time, the cover body 2, the carrier plate 10, the limiting plate 11, and the positioning nut 16 are in a state of being successively tightened. Among them, the mass-reducing holes 19 reduce the mass of the entire limiting plate 11, making the lightweight effect better. Moreover, neither of the two open ends of the mass-reducing holes 19 is in direct contact with the battery cell 13. Therefore, the battery cell 13 and the limiting plate 11 are in surface contact, which can better prevent the battery cell 13 from deforming or being damaged. The protruding parts 20 on the battery rack 9 can abut and fit on both sides of the limiting plate 11, so the stability of the connection between the battery rack 9 and the limiting plate 11 can be further improved (in the finished state, two sides of the battery rack 9 are limited by the limiting plate 11, and the other two sides are respectively limited by the inner walls of the cover body 2 and the housing 1, so the position of the battery rack 9 is also stable).

[0045] The battery cell 13 passes through the hole on the carrier plate 10 and is welded to the electrode row 12. Then, through the electrode row 12, the electric power of the battery cell 13 can be conducted out, and the external electric power can also be charged into the battery cell 13. Both the first explosion-proof valve and the second explosion-proof valve are of film structures, which can allow air to pass through, but water molecules cannot pass through. In this way, even as the internal temperature and pressure of the battery system change during use, the battery system can exchange gases with the outside through the first explosion-proof valve, the second explosion-proof valve, and the pressure relief pipe 18, and at the same time, the outside water vapor will not enter the battery system, with a high safety factor. Among them, when the battery cell 13 expands violently, the first explosion-proof valve can be burst in the first time, and when the entire battery system expands violently, the second explosion-proof valve will also be burst. When assembling the housing 1 and the cover body 2, first, the open end of the housing 1 is clamped into the connection groove 21 on the cover body 2, and then the two are hermetically connected by means of glue or heat melting.

[0046] It should be noted that the various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0047] The above description is only a description of the preferred embodiments of the present invention, and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the technical field of the present invention according to the above disclosure shall fall within the protection scope of the claims.

Claims

1. A 12V start-stop battery system for the LN1 series, characterized in that: It includes a housing (1), a cover body (2) fitted with the housing (1), and a power supply structure. A positive electrode post (3) and a negative electrode post (4) are arranged through the cover body (2) and are hermetically connected to the cover body (2). The end portions of the positive electrode post (3) and the negative electrode post (4) located in the housing (1) are electrically connected to the power supply structure respectively. It further includes: A relay (5) which is used to control the formation of a path or an open circuit between the positive electrode post (3) and the power supply structure; A shunt (6) which is used to detect the current value passing through the negative electrode post (4); A battery controller (7) to which the power supply structure, the relay (5), and the shunt (6) are electrically connected respectively; A communication interface (8) which passes through the cover body (2) and is hermetically connected to the cover body (2), and the communication interface (8) is electrically connected to the battery controller (7); the communication interface (8) is a Lin interface or a Can interface; The power supply structure includes a U-shaped battery rack (9), a carrier plate (10), two limiting plates (11), a plurality of electrode rows (12), and a plurality of battery cells (13). The two limiting plates (11) are located on both sides of the battery rack (9) and form a cover-like structure with the battery rack (9). A plurality of the battery cells (13) are all located in the cover-like structure. All the electrode rows (12) are connected to the carrier plate (10). The battery cells (13) pass through the carrier plate (10) and are electrically connected to the electrode rows (12). One electrode row (12) is electrically connected to the relay (5), and the other electrode row (12) is electrically connected to the shunt (6). The two ends of the battery rack (9) are in contact with the carrier plate (10) and the housing (1) respectively. The limiting plates (11) are fixedly connected to the cover body (2); It further includes a plurality of positioning screws (15) which pass through the limiting plates (11) and are threadedly connected to the cover body (2). A positioning nut (16) is arranged at the end of the positioning screw (15) away from the cover body (2), and the positioning nut (16) abuts against the limiting plate (11).

2. The 12V start-stop battery system for the LN1 series according to claim 1, characterized in that: There are eight battery cells (13). The nth battery cell (13) and the (n + 1)th battery cell (13) form a cell group. The two battery cells (13) in the same cell group are connected in parallel, and any two adjacent cell groups are connected in series, where n = 1, 3, 5, 7. A buffer foam layer (14) is arranged between any two adjacent battery cells (13).

3. A 12V start-stop battery system for the LN1 series according to claim 2, characterized in that: Each cell group is electrically connected to the battery controller (7).

4. A 12V start-stop battery system for the LN1 series according to claim 1 or 2, characterized in that: A plurality of air vents (17) facing the battery cells (13) are formed on the carrier plate (10). A first explosion-proof valve is arranged in the air vents (17). A pressure relief pipe (18) is arranged through the cover body (2) and is hermetically connected to the cover body (2). A second explosion-proof valve is arranged in the pressure relief pipe (18).

5. A 12V start-stop battery system for the LN1 series according to claim 1 or 2, characterized in that: A plurality of mass-reducing holes (19) penetrating through the limiting plate (11) are formed in the limiting plate (11), and both ends of the mass-reducing holes (19) are located outside the battery holder (9).

6. A 12V start-stop battery system for the LN1 series according to claim 1 or 2, characterized in that: Four protruding portions (20) are provided on both sides of the battery holder (9), and both sides of each limiting plate (11) are respectively in contact with two of the protruding portions (20).

7. A 12V start-stop battery system for the LN1 series according to claim 1 or 2, characterized in that: An annular connection groove (21) is formed in the cover body (2), one side of the housing (1) close to the cover body (2) is matched with the connection groove (21), and the housing (1) and the cover body (2) are connected by hot melt sealing or glue sealing.

Images