Shock-proof lithium battery module

Abstract

The invention relates to the technical field of new energy batteries, in particular to a shock-proof lithium battery module which comprises a plurality of single battery cells, the plurality of single battery cells are bundled by a bundling hoop, the end parts of the bundling hoop are connected by a tightening unit, a CSC is fixedly crimped above the single battery cells, a heat-conducting plate is crimped above the CSC, and the heat-conducting plate is fixedly connected with the single battery cells. An absorption unit is attached to the upper portion of the heat conduction plate. According to the device provided by the invention, the moisture in the module can be absorbed through the absorption unit, the probability of corrosion of metal parts is reduced, meanwhile, the absorption assembly can be recycled, the moisture absorbed by the absorption assembly can be dried by using the working heat of the lithium battery module, and the device also has a heat dissipation function, so that the service life of the lithium battery module is prolonged. Meanwhile, the tightening unit can be used for adaptively tightening and fixing a plurality of single battery cells in the lithium battery module.

Description

Technical Field

[0001] The invention relates to the technical field of new energy batteries, in particular to a shock-absorbing lithium battery module. Background Art

[0002] Lithium-ion battery modules are a power source that connects several single cells in series and in parallel through conductive connectors. They are fixed in the designed position through processes and structures to work together to perform the functions of charging, discharging and storing electric energy. It can be said that the basic purpose of the module is connection, fixation and safety protection. The connection method between the single cell and the module busbar not only affects the manufacturing efficiency and whether automation can be achieved, but also has a significant impact on the performance of the battery after installation.

[0003] The CSC in the lithium battery module is the control system of the power battery. Some heat-generating components in the CSC generate a lot of heat, which will cause heat concentration after continuous operation. If it is in a high temperature state for a long time, its performance will deteriorate, affecting the safety of the power battery.

[0004] At the same time, in the manufacturing process of lithium-ion batteries, there are many things that must be strictly controlled, one is dust, the other is metal particles, and the third is moisture. As for the moisture in lithium-ion batteries, its source is mainly from the materials, and of course it also involves the environment. Metal parts themselves have limited absorption of moisture, but metal parts are very afraid of moisture because the presence of moisture will cause them to rust or corrode.

[0005] In new energy vehicles, when the car is driving on a bumpy road, multiple single cells in the lithium battery module may become loose, causing collisions between the single cells, and the wires on the single cells will become loose.

[0006] In summary, the existing lithium battery modules need to consider the temperature control during the working process and how to deal with the moisture precipitated from the material at the working temperature, while also considering the problem of loosening of single cells during use.

[0007] In view of this, the present invention proposes a shock-absorbing lithium battery module to solve the above-mentioned technical problems. Summary of the invention

[0008] In order to solve the shortcomings of the prior art, the present invention provides a shock-absorbing lithium battery module, which can absorb moisture inside the module and reduce the probability of rusting of metal parts. At the same time, the absorption component can be recycled, and the working heat of the lithium battery module itself can be used to dry the moisture absorbed by the absorption component, and it also has the function of heat dissipation.

[0009] The technical solution adopted by the present invention to solve its technical problems is to provide a shock-absorbing lithium battery module, including single-cell batteries. There are multiple single-cell batteries, and the multiple single-cell batteries are bundled by a binding hoop. The ends of the binding hoop are connected by a tightening unit. The tightening unit includes a steel cable. The ends of the binding hoop are fixedly connected with a steel cable. The steel cable is fixedly connected with the piston. The steel cables connected to both ends of the binding hoop respectively extend into the pressure tank and are fixedly connected with the piston. The piston is slidably connected inside the pressure tank. An air outlet is provided in the middle of the pressure tank.

[0010] As a preferred solution of the shock-absorbing lithium battery module of the present invention, two pistons are distributed on both sides of the air outlet. The two pistons and the left and right ends of the pressure tank form two symmetrical cavities. Two air ducts are fixedly connected and communicated on the two cavities, and the two air ducts are communicated with each other.

[0011] As a preferred solution of the shock-absorbing lithium battery module of the present invention, a safety valve is fixedly connected to the air duct. As a preferred solution of the shock-absorbing lithium battery module of the present invention, the end of the air duct is fixedly connected with a piston cylinder. The piston cylinder is composed of a piston tube, a rubber piston, a spring and a one-way valve.

[0012] As a preferred solution of the shock-absorbing lithium battery module of the present invention, the single-cell batteries are loaded in the lithium battery module body. The lithium battery module body includes: a bottom plate, the single-cell batteries are fixedly connected to the bottom plate, the side plates are fixedly connected to both sides of the bottom plate, the end plates are fixedly connected to the other two sides of the bottom plate, a top cover is arranged above the bottom plate, and the bottom plate, side plates, end plates and top cover enclose a cavity for loading the single-cell batteries.

[0013] As a preferred solution of the shock-absorbing lithium battery module of the present invention, a CSC is fixedly pressed above the multiple single-cell batteries, a heat-conducting plate is pressed above the CSC, and heat dissipation holes are provided on the top cover.

[0014] As a preferred solution of the shock-absorbing lithium battery module of the present invention, an absorption unit is attached above the heat-conducting plate. The absorption unit includes a sliding frame. A left absorption plate is slidably installed at the bottom of the sliding frame. The lower end surface of the left absorption plate is slidably attached to the heat-conducting plate. The upper end surface of the left absorption plate is slidably attached to a right absorption plate, and the right absorption plate is also slidably installed on the sliding frame.

[0015] As a preferred solution of the shock-absorbing lithium battery module of the present invention, racks are fixedly connected to the side walls of the left absorption plate and the right absorption plate. The upper and lower two racks are connected by a gear, and the gear is fixedly connected to the output shaft of the motor.

[0016] As a preferred solution of the shock-absorbing lithium battery module of the present invention, the part where the left absorption plate and the right absorption plate are attached is located directly above the heat conduction plate and directly below the heat dissipation hole area.

[0017] Advantages of the present invention: (1) In the present invention, the piston cylinder will transmit the external gas through the air duct to both ends of the two pistons and the pressure tank to form two symmetrical cavities. At this time, the two symmetrical pistons will slide towards the air outlet under pressure. At the same time, the two pistons will pull the steel cable towards the middle of the pressure tank, and the steel cable will pull the binding hoop to tighten. Although the binding hoop has a binding force on multiple single cells during installation, after a long time of operation, its own material will have fatigue, resulting in a poor binding force on multiple single cells. At the same time, the lithium battery module is applied in different environments, such as new energy vehicles. During driving bumps, it is very easy to cause the binding hoop to loosen, lose the binding of multiple single cells, and the multiple single cells shift, which will cause collision damage between them or the wires connected to them to loosen. However, the binding hoop can adaptively tighten multiple single cells during subsequent use.

[0018] (2) In the present invention, while the air duct continuously inflates the pressure tank to tighten the binding hoop, the pressure values in the pressure tank and the air duct will increase. Along with the increase in the binding force of the binding hoop, when it reaches the preset threshold of the safety valve, the safety valve will discharge the excess gas to stabilize the pressure and prevent the binding force of the binding hoop from being too large.

[0019] (3) In the present invention, each time the single cell supplies power, the motor will be started synchronously. The motor drives the gear to rotate, and the rotation of the gear will pull the right absorption plate and the left absorption plate to slide through the rack. The right absorption plate and the left absorption plate exposed in the battery module can absorb moisture and keep the inside of the battery module dry.

[0020] (4) In the present invention, the CSC transfers heat to the upper heat conduction plate, and the heat conduction plate transfers the heat to the overlapping area where the left absorption plate and the right absorption plate are attached above, heats it, makes the internally absorbed moisture re-precipitate, and discharges it from the heat dissipation holes on the top cover, completing the drying of the left absorption plate and the right absorption plate, so that they can be reused. Description of the drawings

[0021] The present invention will be further described below with reference to the drawings and embodiments. Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the sliding frame, right absorption plate, left absorption plate and piston cylinder structure of the present invention; Figure 3Schematic diagram of the single cell, CSC and end plate structure of the present invention; Figure 4 Schematic diagram of the single cell, binding hoop and pressure tank structure of the present invention; Figure 5 Schematic diagram of the absorption unit, heat dissipation holes and top cover structure of the present invention; Figure 6 Schematic diagram of the single cell, binding hoop and top cover structure of the present invention; Figure 7 is Figure 4 the enlarged schematic diagram at position A in Figure 8 is Figure 5 the enlarged schematic diagram at position B in Figure 9 Schematic diagram of the internal connection structure of the pressure tank of the present invention; Figure 10 Movement logic schematic diagram of the right absorption plate and the left absorption plate; In the figure: 1. End plate; 11. Side plate; 12. Top cover; 13. Heat dissipation holes; 14. Single cell; 15. CSC; 16. Bottom plate; 17. Heat conduction plate; 2. Absorption unit; 21. Sliding frame; 23. Right absorption plate; 24. Left absorption plate; 25. Motor; 26. Gear; 28. Rack; 3. Binding hoop; 4. Tightening unit; 41. Air duct; 42. Safety valve; 43. Pressure tank; 44. Steel cable; 45. Piston; 46. Air outlet; 47. Piston cylinder. Detailed implementation manners

[0022] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in combination with specific implementation manners.

[0023] An embodiment of the present invention provides a shock-absorbing lithium battery module, which can absorb moisture inside the module, reduce the probability of corrosion of metal parts, and at the same time, the absorption component can be recycled, and the working heat of the lithium battery module itself can be used to dry the moisture absorbed by the absorption component, and it also has a heat dissipation function.

[0024] Embodiment 1: As Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 7 and Figure 9As shown in the figure, a shock-absorbing lithium battery module includes a single cell 14. There are multiple single cells 14, and the multiple single cells 14 are bundled by a binding hoop 3. The ends of the binding hoop 3 are connected by a tightening unit 4. The tightening unit 4 includes a steel cable 44. The end of the binding hoop 3 is fixedly connected to the steel cable 44. The steel cable 44 is fixedly connected to the piston 45. The steel cables 44 connected to both ends of the binding hoop 3 respectively extend into the pressure tank 43 and are fixedly connected to the piston 45. The piston 45 is slidably connected inside the pressure tank 43. An air outlet 46 is provided in the middle of the pressure tank 43; Further, two pistons 45 are distributed on both sides of the air outlet 46. The two pistons 45 and the left and right ends of the pressure tank 43 form two symmetrical cavities. Two air ducts 41 are fixedly connected and communicated with the two cavities. The two air ducts 41 communicate with each other; Further, a safety valve 42 is fixedly connected to the air duct 41; Further, the end of the air duct 41 is fixedly connected to a piston cylinder 47. The piston cylinder 47 is composed of a piston tube, a rubber piston, a spring and a one-way valve; Further, the single cell 14 is loaded in the lithium battery module body. The lithium battery module body includes a bottom plate 16. The single cell 14 is fixedly connected to the bottom plate 16. Side plates 11 are fixedly connected to both sides of the bottom plate 16. End plates 1 are fixedly connected to the other two sides of the bottom plate 16. A top cover 12 is provided above the bottom plate 16. The bottom plate 16, the side plates 11, the end plates 1 and the top cover 12 enclose a cavity for loading the single cell 14.

[0025] In the embodiment, the user assembles the end plate 1, the side plate 11, the top cover 12 and the bottom plate 16, then installs multiple single cells 14 side by side, and at the same time installs a binding hoop 3 around the multiple single cells 14. The binding hoop 3 is used to tie the multiple single cells 14 together to prevent the single cells 14 from loosening during use and causing the connected wires to fall off.

[0026] It should be understood that when the right absorption plate 23 slides, it will cooperate with the piston cylinder 47. When the rubber piston in the piston cylinder 47 is repeatedly squeezed, the piston cylinder 47 will transmit the external gas through the air duct 41 to both ends of the two pistons 45 and the pressure tank 43 to form two symmetrical cavities. At this time, the two symmetrical pistons 45 will slide toward the direction close to the air outlet 46 under the pressure, and at the same time, the two pistons 45 will pull the steel cable 44 toward the middle of the pressure tank 43. The steel cable 44 will pull and tighten the binding hoop 3. Although the binding hoop 3 has a binding force on multiple single-cell batteries 14 during installation, after a long time of operation, its own material will have fatigue, resulting in a poor binding force on multiple single-cell batteries 14. At the same time, the lithium battery module is applied in different environments, such as in new energy vehicles. During driving bumps, it is very easy to cause the binding hoop 3 to loosen, lose the binding on multiple single-cell batteries 14, and the multiple single-cell batteries 14 shift, which will lead to mutual collision damage or the loosening of the connected wires. However, the binding hoop 3 can adaptively tighten multiple single-cell batteries 14 during subsequent use.

[0027] It should also be noted that while the air duct 41 continuously inflates the pressure tank 43 to tighten the binding hoop 3, the pressure values in the pressure tank 43 and the air duct 41 will increase. Along with the increase in the binding force of the binding hoop 3, when the preset threshold of the safety valve 42 is reached, the safety valve 42 will discharge the excess gas to stabilize the pressure and prevent the binding force of the binding hoop 3 from being too large.

[0028] Embodiment 2: It is basically the same as Embodiment 1, and the main differences are as Figures 1 - 6 and Figure 8 、 Figure 9 shown. A CSC 15 is fixedly crimped above multiple said single-cell batteries 14, a heat conduction plate 17 is crimped above the CSC 15, and a heat dissipation hole 13 is opened on the top cover 12; Furthermore, an absorption unit 2 is attached to the upper side of the heat conduction plate 17. The absorption unit 2 includes a sliding frame 21. A left absorption plate 24 is slidably installed at the bottom of the sliding frame 21. The lower end surface of the left absorption plate 24 is slidably attached to the heat conduction plate 17, and the upper end surface of the left absorption plate 24 is slidably attached to a right absorption plate 23. The right absorption plate 23 is also slidably installed on the sliding frame 21; Furthermore, racks 28 are fixedly connected to the side walls of the left absorption plate 24 and the right absorption plate 23. The upper and lower two racks 28 are connected by a gear 26, and the gear 26 is fixedly connected to the output shaft of the motor 25; Furthermore, the part where the left absorption plate 24 and the right absorption plate 23 are attached is located directly above the heat conduction plate 17 and directly below the area of the heat dissipation hole 13.

[0029] In an embodiment, the single cell 14 synchronously starts the motor 25 during each power supply. The motor 25 drives the gear 26 to rotate when it works. The rotation of the gear 26 pulls the right absorption plate 23 and the left absorption plate 24 to slide through the rack 28. The motion logic between the two is as Figure 10 shown as follows: When the single cell 14 supplies power for the first time, the motor 25 drives the left absorption plate 24 and the right absorption plate 23 to slide to the rightmost end and the leftmost end of the sliding frame 21 respectively. At this time, the x and c regions coincide, and the z and v regions are exposed in the battery module; When the single cell 14 supplies power for the second time, the motor 25 drives the left absorption plate 24 and the right absorption plate 23 to slide to the leftmost end and the rightmost end of the sliding frame 21 respectively. At this time, the z and v regions coincide, and the x and c regions are exposed in the battery module; When the single cell 14 supplies power for the third time, the motor 25 drives the left absorption plate 24 and the right absorption plate 23 to slide to the rightmost end and the leftmost end of the sliding frame 21 respectively. At this time, the x and c regions coincide, and the z and v regions are exposed in the battery module; And so on... It should be noted that: the moisture content in the material is an important source of moisture in the lithium battery module. Of course, the greater the environmental humidity, the easier it is for the lithium battery module material to absorb moisture. The metal parts themselves have limited absorption of moisture. However, the metal parts are very afraid of moisture because the presence of moisture will cause them to rust or corrode. When the lithium battery module is working continuously, its moisture will precipitate, causing corrosion of the metal parts. The exposure of the x and c regions in the battery module and the exposure of the x and c regions in the battery module can absorb moisture well, drying the interior of the entire lithium battery module. Both the left absorption plate 24 and the right absorption plate 23 are made of water-absorbing materials.

[0030] It should also be noted that: the CSC15 above multiple single cells 14 is the control system of the power battery. Some heating devices in the CSC15 generate a large amount of heat, and heat concentration will occur after continuous operation. If it is in a high-temperature state for a long time, its performance will decline, affecting the safety of the power battery. The CSC15 transfers the heat to the heat conduction plate 17 above. The heat conduction plate 17 transfers the heat to the overlapping region where the left absorption plate 24 and the right absorption plate 23 are attached above, heating it to re-precipitate the absorbed moisture, which is discharged from the heat dissipation holes 13 on the top cover 12, completing the drying of the left absorption plate 24 and the right absorption plate 23, enabling them to be reused. The specific working process is as follows: During operation, the user assembles the end plate 1, side plate 11, top cover 12 and bottom plate 16, and then installs multiple single-cell batteries 14 side by side. At the same time, a binding hoop 3 is installed around the periphery of the multiple single-cell batteries 14. The binding hoop 3 is used to tie the multiple single-cell batteries 14 together to prevent the single-cell batteries 14 from becoming loose during use, which may cause the connected wires to fall off. Each time the single-cell battery 14 supplies power, it will synchronously start the motor 25. When the motor 25 operates, it drives the gear 26 to rotate. The rotation of the gear 26 will pull the right absorption plate 23 and the left absorption plate 24 to slide through the rack 28. The parts of the right absorption plate 23 and the left absorption plate 24 exposed in the battery module will absorb moisture and remove the moisture in the battery module. Since the moisture content in the material is an important source of moisture in the lithium battery module, of course, the greater the environmental humidity, the easier it is for the lithium battery module material to absorb moisture. Although the metal parts have limited absorption of moisture, they are very afraid of moisture because the presence of moisture will cause them to rust or corrode. When the lithium battery module is continuously operating, its moisture will precipitate. At the same time, the CSC 15 above the multiple single-cell batteries 14 is the control system of the power battery. Some heating devices in the CSC 15 generate a large amount of heat, and heat concentration will occur after continuous operation. If it is in a high-temperature state for a long time, its performance will decline, affecting the safety of the power battery. The CSC 15 transfers the heat to the heat conduction plate 17 above. The heat conduction plate 17 transfers the heat to the overlapping area where the left absorption plate 24 and the right absorption plate 23 are attached above, heating it to cause the absorbed moisture to precipitate again and discharge from the heat dissipation holes 13 on the top cover 12, completing the drying of the left absorption plate 24 and the right absorption plate 23 so that they can be reused. When the right absorption plate 23 slides, it will cooperate with the piston cylinder 47. When the rubber piston in the piston cylinder 47 is repeatedly squeezed, the piston cylinder 47 will transmit the external gas through the air duct 41 to both ends of the two pistons 45 and the pressure tank 43 to form two symmetrical cavities. At this time, the two symmetrical pistons 45 will slide towards the direction close to the air outlet 46 under the pressure, and at the same time, the two pistons 45 will pull the steel cable 44 towards the middle of the pressure tank 43. The steel cable 44 will pull the binding hoop 3 to tighten. Although the binding hoop 3 has a binding force on the multiple single-cell batteries 14 during installation, after a long time of operation, its own material will have fatigue, resulting in a poor binding force on the multiple single-cell batteries 14. At the same time, the lithium battery module is applied in different environments, such as in new energy vehicles. During driving bumps, it is very easy for the binding hoop 3 to become loose, losing the binding on the multiple single-cell batteries 14, and the multiple single-cell batteries 14 will shift, which may cause mutual collision damage or the loosening of the connected wires. However, the binding hoop 3 can adaptively tighten the multiple single-cell batteries 14 during subsequent use.

[0031] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of protection required by the present invention. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A shock-absorbing lithium battery module, comprising a single cell (14), wherein there are a plurality of single cells (14), characterized in that: The plurality of single battery cells (14) are bundled by a bundling hoop (3), and the ends of the bundling hoop (3) are connected by a tightening unit (4), and the tightening unit (4) comprises: A steel cable (44), the end of the tightening hoop (3) being fixedly connected to the steel cable (44); A piston (45), wherein the steel cable (44) and the piston (45) are fixedly connected; A pressure tank (43), wherein the steel cables (44) connected to both ends of the tightening hoop (3) extend into the interior of the pressure tank (43) and are fixedly connected to the piston (45), and the piston (45) is slidably connected to the interior of the pressure tank (43); An air outlet hole (46) is provided in the middle of the pressure tank (43).

2. A shock-proof lithium battery module according to claim 1, characterized in that: Two pistons (45) are distributed on both sides of the air outlet (46); the two pistons (45) and the left and right ends of the pressure tank (43) form two symmetrical cavities; both cavities are fixedly connected to and communicated with an air guide tube (41); the two air guide tubes (41) are communicated with each other.

3. A shock-proof lithium battery module according to claim 2, characterized in that: The air guide pipe (41) is fixedly connected to a safety valve (42).

4. A shock-proof lithium battery module according to claim 3, characterized in that: The end of the air guide tube (41) is fixedly connected to a piston cylinder (47), and the piston cylinder (47) is composed of a piston tube, a rubber piston, a spring and a one-way valve.

5. The shock-proof lithium battery module according to claim 1, characterized in that: The single cell (14) is loaded in a lithium battery module body, and the lithium battery module body comprises: A bottom plate (16), the single battery cell (14) being fixedly connected to the bottom plate (16); Side plates (11), the side plates (11) being fixedly connected to both sides of the bottom plate (16); An end plate (1), the other two sides of the bottom plate (16) being fixedly connected to the end plates (1); A top cover (12) is arranged above the bottom plate (16), and the bottom plate (16), the side plate (11), the end plate (1) and the top cover (12) form a cavity for loading the single battery cell (14).

6. A shock-proof lithium battery module according to claim 5, characterized in that: A CSC (15) is fixedly crimped onto the top of the plurality of single battery cells (14), a heat conducting plate (17) is crimped onto the top of the CSC (15), and a heat dissipation hole (13) is provided on the top cover (12).

7. A shock-proof lithium battery module according to claim 6, characterized in that: An absorption unit (2) is attached to the top of the heat conducting plate (17), and the absorption unit (2) comprises a sliding frame (21). A left absorption plate (24) is slidably mounted on the bottom of the sliding frame (21). The lower end surface of the left absorption plate (24) is slidably attached to the heat conducting plate (17), and the upper end surface of the left absorption plate (24) is slidably attached to a right absorption plate (23). The right absorption plate (23) is also slidably mounted on the sliding frame (21).

8. A shock-proof lithium battery module according to claim 7, characterized in that: The side walls of the left absorption plate (24) and the right absorption plate (23) are both fixedly connected with a rack (28); the upper and lower racks (28) are connected via a gear (26); and the gear (26) is fixedly connected to the output shaft of the motor (25).

9. A shock-proof lithium battery module according to claim 8, characterized in that: The portion where the left absorption plate (24) and the right absorption plate (23) are attached is located directly above the heat conducting plate (17) and directly below the heat dissipation hole (13) area.

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