New energy lithium battery pack protection device with heat dissipation and cooling functions

Abstract

The invention relates to the technical field of new energy battery pack cooling, and discloses a heat dissipation and cooling new energy lithium battery pack protection device which comprises a battery pack assembly, a cooling assembly is fixedly mounted at the bottom end of the battery pack assembly, a buffer protection assembly is fixedly mounted on the outer side of the battery pack assembly, and the battery pack assembly comprises a battery mounting bottom plate. A connecting plate is fixedly mounted on the upper surface of the front end of the battery mounting bottom plate, an end groove is formed in the connecting plate, a line concentration assembly is fixedly mounted on the connecting plate, a line concentration port is formed in the line concentration assembly, the line concentration port and the end groove are mounted in a mutually aligned manner, and lithium battery packs which are uniformly distributed and connected in series are fixedly mounted on the upper surface of the battery mounting bottom plate; a cooling cover plate is fixedly installed on the lithium battery pack, an in-plate cavity is formed in the cooling cover plate, a sealing plate strip is fixedly installed at the tail end of the cooling cover plate, and the device has the cooling and heat dissipation functions on the new energy lithium battery pack and achieves the buffer protection function on the battery pack.

Description

Technical Field

[0001] The present invention relates to the technical field of cooling the temperature of a new energy battery pack, and more specifically to a new energy lithium battery pack protection device for heat dissipation and cooling. Background Art

[0002] In pure electric vehicles equipped with only lithium batteries, lithium batteries are the only power source for the vehicle drive system; in hybrid vehicles equipped with traditional engines (or fuel cells) and lithium batteries, lithium batteries can be both the main power source and the auxiliary power source for the vehicle drive system. When the vehicle is at low speed and starting, the lithium battery is the main power source for the vehicle drive system; when accelerating at full load, the lithium battery is an auxiliary power source; when driving normally or decelerating or braking, the main function of the lithium battery is to store energy.

[0003] The battery pack of an electric vehicle is composed of multiple batteries stacked in series. A typical battery pack consists of ninety-six batteries. Taking a 4.2V lithium battery as an example, the car power system regards the battery pack as a single high-voltage battery, charging and discharging the entire battery pack each time. Such a battery pack can generate a total voltage of more than four hundred volts. The battery pack will generate a lot of heat during operation. If the heat cannot be dissipated in time, it will cause the battery temperature to rise, thereby affecting the performance, life and even safety of the battery. Therefore, the cooling and heat dissipation system is crucial for new energy battery packs. The cooling method under the existing technology is to configure a cooling fan at one end of the battery pack and set a vent at the other end to use air flow to take away the heat generated by the battery cell when it is working. However, in actual use, the new energy lithium battery pack under the existing technology still has the following shortcomings; First, the new energy lithium battery pack under the existing technology will generate high temperature under the continuous discharge and charging working cycle. The battery pack is usually installed on the chassis of the electric vehicle and uses a fan to dissipate heat. Due to the relatively closed location, if the temperature is not effectively controlled, the lithium battery is prone to thermal runaway, causing electric vehicle failure or even accidents. The existing technology does not have a device for efficiently dissipating heat and cooling the new energy lithium battery pack. Secondly, the new energy lithium battery pack under the existing technology is installed and fixed on the chassis of the electric vehicle. As the electric vehicle moves, if the new energy lithium battery pack at the chassis is not installed stably, it will cause a collision risk due to its movement inertia. The new energy lithium battery pack under the existing technology does not have a safe buffer device when installed.

[0004] Therefore, in order to solve the above problems, it is necessary to provide a new energy lithium battery pack protection device for heat dissipation and cooling. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a new energy lithium battery pack protection device for heat dissipation and temperature reduction to solve the problems existing in the above-mentioned background technology.

[0006] The present invention provides the following technical solution: a heat dissipation and temperature reduction new energy lithium battery pack protection device, comprising a battery pack assembly, a cooling assembly is fixedly installed at the bottom end of the battery pack assembly, and a buffer protection assembly is fixedly installed on the outside of the battery pack assembly; The battery pack assembly includes a battery mounting base plate, a connecting plate is fixedly mounted on the front upper surface of the battery mounting base plate, an end slot is opened on the connecting plate, and a wire collection assembly is fixedly mounted, a wire collection port is provided on the wire collection assembly, and the wire collection port and the end slot are installed in alignment with each other, a lithium battery pack that is evenly distributed and connected in series is fixedly mounted on the upper surface of the battery mounting base plate, a front vertical plate is fixedly mounted on the front side of the bottom end of the battery mounting base plate, a cooling cover plate is fixedly mounted on the lithium battery pack, the cooling cover plate is opened with an inner cavity, a sealing strip is fixedly mounted on the end of the cooling cover plate, and the sealing strip is opened with evenly distributed plate holes.

[0007] Furthermore, the cooling assembly includes a cooling liquid box, which is fixedly mounted at the front end of the battery mounting base plate, a liquid delivery pump is provided inside the cooling liquid box, a liquid box plate is fixedly mounted on the upper end, an output end of the liquid box plate is fixedly connected to a liquid infusion tube, an infusion tube, an infusion tube, a pipe end of the infusion tube is fixedly connected to a liquid collecting box, the liquid collecting box is fixedly connected to four evenly distributed liquid distribution tubes, and the tube body of the liquid distribution tube is fixedly connected to evenly distributed pressure nozzles.

[0008] Furthermore, a mounting arc plate is fixedly mounted on the bottom surface of the battery mounting base plate, and four evenly distributed pipe sleeves are fixedly mounted on the mounting arc plate. The liquid distributing pipes are respectively fixedly sleeved with the pipe sleeves, and the ends of the pipes of the liquid distributing pipes are fixedly connected with liquid outlet pipes.

[0009] Furthermore, a rear vertical plate is fixedly installed on the rear side of the bottom end of the battery mounting base plate, and the tube body of the liquid outlet pipe passes through the rear vertical plate and is fixedly connected to the plate holes respectively, and side vertical plates are fixedly installed on both sides of the bottom end of the battery mounting base plate, and a filter plate is fixedly installed on the bottom end of the side vertical plate, and a bottom liquid box is fixedly installed on the bottom end of the filter plate, and a reflux liquid pump is provided inside the bottom liquid box, and a return liquid pipe is fixedly connected to the output end of the reflux liquid pump, and the pipe end of the return liquid pipe is fixedly connected to the coolant box. When the lithium battery pack generates high temperature and thermal runaway during discharge and charging activities, the delivery pump starts to deliver the coolant stored in the coolant box to the liquid collecting box through the delivery tube, and then delivers it to the inside of the cooling cover through the liquid distribution tube and the liquid outlet tube. The cooling cover is installed on the upper end of the lithium battery pack. The cooling cover cools and dissipates the heat at the upper end of the lithium battery pack. At the same time, when the cooling cover is filled with coolant, the coolant will spray outward from the pressure nozzle, thereby cooling the bottom surface of the battery mounting base plate. At the same time, the coolant also rinses the bottom surface of the battery mounting base plate. The dust and impurities flushed down will fall onto the top of the filter plate with the coolant and be intercepted by the filtering action of the filter plate. The filtered coolant will enter the bottom liquid box for re-cooling. After it cools down, it will be re-delivered to the coolant box through the return pipe by the reflux liquid pump for reuse.

[0010] Furthermore, the buffer protection component includes two protective plates symmetrically distributed on both sides of the battery mounting base plate, and telescopic plates are connected between the front and rear ends of the protective plates and the battery mounting base plate.

[0011] Furthermore, the inner side of the protective plate is fixedly connected with evenly distributed column barrels, the interior of the column barrels is movably sleeved with a piston shaft, the end of the piston shaft is fixedly connected to the battery mounting base plate, a spring is sleeved on the shaft body of the piston shaft, a damping hole is provided at the piston of the piston shaft, the interior of the column barrel is filled with damping oil, the battery mounting base plate is installed at the bottom of the car, when the car causes the battery mounting base plate to produce an inertial collision during movement, the piston shaft will perform telescopic movement in the column barrel, and under the action of the damping oil in the column barrel, the telescopic movement of the piston shaft is buffered.

[0012] Technical effects and advantages of the present invention: 1. The present invention is provided with a cooling assembly. When the lithium battery pack generates high temperature during discharge and charging activities and is about to have thermal runaway or has already had thermal runaway, the delivery liquid pump is started to deliver the coolant stored in the coolant box to the liquid collecting box through the delivery pipe, and then delivers it to the inside of the cooling cover plate through the liquid distribution pipe and the liquid outlet pipe. The cooling cover plate is installed on the upper end of the lithium battery pack. The cooling cover plate cools and dissipates the heat at the upper end of the lithium battery pack. At the same time, when the cooling cover plate is filled with coolant, the coolant will spray outward from the pressure nozzle, thereby cooling and lowering the temperature of the bottom surface of the battery mounting bottom plate. At the same time, the coolant also rinses the bottom surface of the battery mounting bottom plate. The dust and impurities washed down will fall onto the top of the filter plate with the coolant and be intercepted under the filtering action of the filter plate. The filtered coolant will enter the bottom liquid box for re-cooling. After it cools down, it will be re-delivered to the coolant box through the return pipe by the reflux liquid pump for reuse. The above structure realizes the overall heat dissipation function of the lithium battery pack from top to bottom of the device, and has a certain cleaning function.

[0013] 2. The present invention is provided with a buffer protection component. The battery mounting base plate is mounted on the bottom of the car. When the car is moving and causes the battery mounting base plate to produce inertial collision, the piston shaft will perform telescopic movement in the column tube. Under the action of the damping oil in the column tube, the telescopic movement of the piston shaft is buffered, thereby providing buffer protection for the inertial collision of the battery mounting base plate and improving the safety performance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the battery pack assembly structure of the present invention.

[0016] Figure 3 It is a schematic diagram of the structure of the cavity in the plate of the present invention.

[0017] Figure 4 It is a schematic diagram of the cooling assembly structure of the present invention.

[0018] Figure 5 It is a schematic diagram of the structure of the filter plate of the present invention.

[0019] Figure 6 It is a schematic diagram of the structure of the liquid dispensing tube of the present invention.

[0020] Figure 7 It is a schematic diagram of the structure of the liquid outlet pipe of the present invention.

[0021] Figure 8 It is a schematic diagram of the structure of the buffer protection component of the present invention.

[0022] Fig. 9 It is a schematic diagram of the cross-sectional structure of the buffer protection component of the present invention.

[0023] The reference numerals are: 1. battery pack assembly; 101. battery mounting base plate; 102. connection plate; 103. end slot; 104. cable collection assembly; 105. cable collection port; 106. lithium battery pack; 107. cooling cover plate; 108. cavity in plate; 109. sealing strip; 110. plate hole; 2. cooling assembly; 201. cooling liquid box; 202. liquid delivery pump; 203. liquid box plate; 204. liquid delivery tube; 205. front stand; 2 06. Liquid collecting box; 207. Liquid dispensing tube; 208. Pressure nozzle; 209. Mounting arc plate; 210. Pipe sleeve; 211. Liquid outlet pipe; 212. Rear vertical plate; 213. Side vertical plate; 214. Filter plate; 215. Bottom liquid box; 216. Reflux liquid pump; 217. Return liquid pipe; 3. Buffer protection assembly; 301. Protective plate; 302. Telescopic plate; 303. Column; 304. Piston shaft; 305. Spring; 306. Damping hole. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are only examples. The new energy lithium battery pack protection device for heat dissipation and cooling involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained without creative work by ordinary technicians in this field belong to the scope of protection of the present invention.

[0025] Reference Figure 1 The present invention provides a new energy lithium battery pack protection device for heat dissipation and temperature reduction, comprising a battery pack assembly 1, a cooling assembly 2 is fixedly installed at the bottom end of the battery pack assembly 1, and a buffer protection assembly 3 is fixedly installed on the outer side of the battery pack assembly 1; In this embodiment, the battery pack assembly 1 provides the main power source for the electric vehicle, the cooling assembly 2 is used to realize the cooling and heat dissipation function of the battery pack assembly 1, and the buffer protection assembly 3 is used to buffer and protect the battery pack assembly 1. The specific structure and working principle of the above-mentioned components will be described in detail later.

[0026] Reference Figure 2 and Figure 3The battery pack assembly 1 includes a battery mounting base plate 101, a connecting plate 102 is fixedly mounted on the front upper surface of the battery mounting base plate 101, an end groove 103 is provided on the connecting plate 102, a line collection assembly 104 is fixedly mounted on the connecting plate 102, a line collection port 105 is provided on the line collection assembly 104, and the line collection port 105 and the end groove 103 are aligned with each other, a lithium battery pack 106 that is evenly distributed and connected in series is fixedly mounted on the upper surface of the battery mounting base plate 101, a cooling cover plate 107 is fixedly mounted on the lithium battery pack 106, the cooling cover plate 107 is provided with an inner plate cavity 108, a sealing strip 109 is fixedly mounted on the end of the cooling cover plate 107, and the sealing strip 109 is provided with evenly distributed plate holes 110; In this embodiment, the lithium battery packs 106 are connected in series and evenly mounted on the battery mounting base plate 101, so as to provide power for the electric vehicle. Since the above structure is a conventional technical means known to those skilled in the art, its working principle and specific structure are not described in detail in this embodiment.

[0027] Reference Figure 4-Figure 7 The cooling assembly 2 includes a cooling liquid box 201, which is fixedly mounted on the front end of the battery mounting base plate 101. A liquid delivery pump 202 is arranged inside the cooling liquid box 201. A liquid box plate 203 is fixedly mounted on the upper end of the cooling liquid box 201. A liquid delivery tube 204 is fixedly connected to the output end of the liquid box plate 203. A front vertical plate 205 is fixedly mounted on the front side of the bottom end of the battery mounting base plate 101. A liquid collecting box 206 is fixedly connected to the end of the pipeline of the liquid delivery tube 204. The liquid collecting box 206 is fixedly connected to four evenly distributed liquid distribution tubes 207. The tube body of the liquid distribution tube 207 is fixedly connected to evenly distributed pressure nozzles 208. A mounting arc plate 209 is fixedly mounted on the bottom surface of the battery mounting base plate 101. There are four evenly distributed pipe sleeves 210, the liquid distributing pipes 207 are fixedly sleeved with the pipe sleeves 210 respectively, the pipe ends of the liquid distributing pipes 207 are fixedly connected with liquid outlet pipes 211, a rear vertical plate 212 is fixedly installed on the rear side of the bottom end of the battery mounting base plate 101, and the pipe body of the liquid outlet pipe 211 passes through the rear vertical plate 212 and is fixedly connected with the plate holes 110 respectively, and side vertical plates 213 are fixedly installed on both sides of the bottom end of the battery mounting base plate 101, and a filter plate 214 is fixedly installed on the bottom end of the side vertical plate 213, and a bottom liquid box 215 is fixedly installed on the bottom end of the filter plate 214, and a reflux liquid pump 216 is provided inside the bottom liquid box 215, and the output end of the reflux liquid pump 216 is fixedly connected with a return liquid pipe 217, and the pipe end of the return liquid pipe 217 is fixedly connected to the coolant box 201; In this embodiment, when the lithium battery pack 106 generates high temperature during discharge and charging activities, the liquid delivery pump 202 is started to deliver the coolant stored in the coolant box 201 to the liquid collection box 206 through the liquid delivery tube 204, and then deliver it to the inside of the cooling cover plate 107 through the liquid distribution tube 207 and the liquid outlet tube 211. The cooling cover plate 107 is installed on the upper end of the lithium battery pack 106. The cooling cover plate 107 cools and dissipates the heat at the upper end of the lithium battery pack 106. At the same time, when the cooling cover plate 107 is filled with coolant, the coolant will be sprayed outward from the pressure nozzle 208. Thereby, the bottom surface of the battery mounting base plate 101 is cooled down, and at the same time, the coolant also rinses the bottom surface of the battery mounting base plate 101. The dust and impurities rinsed down will fall onto the top of the filter plate 214 with the coolant, and be intercepted by the filtering action of the filter plate 214. The filtered coolant will enter the bottom liquid box 215 for re-cooling. After it is cooled down, it will be re-delivered to the coolant box 201 through the return pipe 217 by the reflux liquid pump 216 for reuse. The above structure realizes the overall heat dissipation function of the device for the lithium battery pack 106 from top to bottom, and also has a certain cleaning function.

[0028] Reference Figure 8 and Fig. 9 The buffer protection component 3 includes a protective plate 301, the number of the protective plates 301 is two and they are symmetrically distributed on both sides of the battery installation base plate 101, and a telescopic plate 302 is connected between the front and rear ends of the protective plate 301 and the battery installation base plate 101, and the inner side of the protective plate 301 is fixedly connected with uniformly distributed cylinders 303, and the inner side of the cylinder 303 is movably sleeved with a piston shaft 304, and the end of the shaft body of the piston shaft 304 is fixedly connected to the battery installation base plate 101, and the shaft body of the piston shaft 304 is sleeved with a spring 305, and the piston of the piston shaft 304 is provided with a damping hole 306, and the interior of the cylinder 303 is filled with damping oil; In this embodiment, the battery mounting base plate 101 is installed at the bottom of the car. When the battery mounting base plate 101 generates an inertial collision during movement of the car, the piston shaft 304 will perform a telescopic movement in the column tube 303. Under the action of the damping oil in the column tube 303, the telescopic movement of the piston shaft 304 is buffered, thereby providing buffering protection for the inertial collision of the battery mounting base plate 101 and improving the safety performance of the device.

[0029] The working principle of the present invention is as follows: when the lithium battery pack 106 generates high temperature during the discharge and charging activities, the liquid delivery pump 202 is started to deliver the coolant stored in the coolant box 201 to the liquid collection box 206 through the liquid delivery tube 204, and then deliver it to the inside of the cooling cover plate 107 through the liquid distribution tube 207 and the liquid outlet tube 211. The cooling cover plate 107 is installed on the upper end of the lithium battery pack 106. The cooling cover plate 107 cools and dissipates the heat at the upper end of the lithium battery pack 106. At the same time, when the cooling cover plate 107 is filled with coolant, the coolant will spray outward from the pressure nozzle 208, thereby cooling and cooling the bottom surface of the battery mounting base plate 101. At the same time, the coolant also rinses the bottom surface of the battery mounting base plate 101, and the dust and impurities rinsed will fall into the filter plate 2 with the coolant. 14, is intercepted by the filtering action of the filter plate 214, and the filtered coolant enters the bottom liquid box 215 for re-cooling. After cooling down, it is re-delivered to the coolant box 201 through the return pipe 217 by the reflux liquid pump 216 for reuse. The above structure realizes the overall heat dissipation function of the lithium battery pack 106 from top to bottom of the device, and also has a certain cleaning function. The battery mounting base plate 101 is installed at the bottom of the car. When the car causes the battery mounting base plate 101 to produce an inertial collision during movement, the piston shaft 304 will perform a telescopic movement in the column barrel 303. Under the action of the damping oil in the column barrel 303, the telescopic movement of the piston shaft 304 is buffered, thereby providing buffer protection for the inertial collision of the battery mounting base plate 101, thereby improving the safety performance of the device.

[0030] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change; Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other; Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new energy lithium battery pack protection device for heat dissipation and cooling, characterized in that: It comprises a battery pack assembly (1), a cooling assembly (2) being fixedly mounted on the bottom end of the battery pack assembly (1), and a buffer protection assembly (3) being fixedly mounted on the outer side of the battery pack assembly (1); The battery pack assembly (1) comprises a battery mounting base plate (101), a connecting plate (102) is fixedly mounted on the front upper surface of the battery mounting base plate (101), an end slot (103) is provided on the connecting plate (102), a line collection assembly (104) is fixedly mounted on the connecting plate (102), a line collection port (105) is provided on the line collection assembly (104), the line collection port (105) and the end slot (103) are installed in alignment with each other, a lithium battery pack (106) that is evenly distributed and connected in series is fixedly mounted on the upper surface of the battery mounting base plate (101), a cooling cover plate (107) is fixedly mounted on the lithium battery pack (106), the cooling cover plate (107) is provided with an inner plate cavity (108), a sealing plate strip (109) is fixedly mounted on the end of the cooling cover plate (107), and the sealing plate strip (109) is provided with evenly distributed plate holes (110).

2. A heat dissipation and temperature reduction new energy lithium battery pack protection device according to claim 1, characterized in that: The cooling assembly (2) comprises a cooling liquid box (201), the cooling liquid box (201) being fixedly mounted on the front end of the battery mounting base plate (101), a liquid delivery pump (202) being provided inside the cooling liquid box (201), a liquid box plate (203) being fixedly mounted on the upper end of the cooling liquid box (201), an output end of the liquid box plate (203) being fixedly connected to a liquid delivery tube (204), a front vertical plate (205) being fixedly mounted on the front side of the bottom end of the battery mounting base plate (101), a pipe end of the liquid delivery tube (204) being fixedly connected to a liquid collecting box (206), the liquid collecting box (206) being fixedly connected to four evenly distributed liquid distribution tubes (207), and a pipe body of the liquid distribution tube (207) being fixedly connected to evenly distributed pressure nozzles (208).

3. A heat dissipation and temperature reduction new energy lithium battery pack protection device according to claim 2, characterized in that: A mounting arc plate (209) is fixedly mounted on the bottom surface of the battery mounting bottom plate (101), four evenly distributed pipe sleeves (210) are fixedly mounted on the mounting arc plate (209), the liquid distributing pipes (207) are respectively fixedly sleeved with the pipe sleeves (210), and the ends of the pipes of the liquid distributing pipes (207) are fixedly connected with liquid outlet pipes (211).

4. A heat dissipation and temperature reduction new energy lithium battery pack protection device according to claim 3, characterized in that: A rear vertical plate (212) is fixedly mounted on the rear side of the bottom end of the battery mounting base plate (101); the body of the liquid outlet pipe (211) passes through the rear vertical plate (212) and is fixedly connected to the plate holes (110) respectively; side vertical plates (213) are fixedly mounted on both sides of the bottom end of the battery mounting base plate (101); a filter plate (214) is fixedly mounted on the bottom end of the side vertical plate (213); a bottom liquid box (215) is fixedly mounted on the bottom end of the filter plate (214); a reflux liquid pump (216) is provided inside the bottom liquid box (215); a reflux liquid pump (216) is fixedly connected to the output end of the reflux liquid pump (216); and a pipe end of the reflux liquid pipe (217) is fixedly connected to the coolant box (201).

5. The heat dissipation and temperature reduction new energy lithium battery pack protection device according to claim 1 is characterized in that: The buffer protection assembly (3) comprises a protection plate (301), the number of the protection plates (301) being two and symmetrically distributed on both sides of the battery installation base plate (101), and a telescopic plate (302) being connected between the front and rear ends of the protection plates (301) and the battery installation base plate (101).

6. A heat dissipation and temperature reduction new energy lithium battery pack protection device according to claim 5, characterized in that: The inner side of the protective plate (301) is fixedly connected to evenly distributed cylinders (303), the interior of the cylinder (303) is movably sleeved with a piston shaft (304), the end of the piston shaft (304) is fixedly connected to the battery mounting base plate (101), a spring (305) is sleeved on the shaft of the piston shaft (304), a damping hole (306) is provided at the piston of the piston shaft (304), and damping oil is injected into the interior of the cylinder (303).

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