Lithium battery module and lithium battery

Abstract

The utility model discloses a lithium battery module and lithium battery belong to lithium battery module technical field, and its technical scheme main points include casing and lithium battery monomer, the inside of casing is provided with the spacing element, the spacing element includes fixed plate, the inside of fixed plate is provided with the heat dissipation subassembly, through setting heat dissipation subassembly, the close board can be closely bonded lithium battery monomer side, and the layout of serpentine flow channel can cover lithium battery monomer side whole area, especially for lithium battery monomer middle part high heat -generating area, realize point -to -point heat conduction, avoid lithium battery monomer partial overheating, realize the effect that evenly radiate heat, through setting spacing element, when lithium battery monomer charge -discharge expansion or shrinkage, spring compression allows the close board to move back, avoid rigid extrusion and lead to lithium battery monomer deformation, thereby reach the effect that self -adaptation lithium battery monomer deformation, improve its service life.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery module technology, and in particular to a lithium battery module and a lithium battery. Background Technology

[0002] With the rapid development of new energy technologies, lithium batteries, as core energy storage components, are widely used in electric vehicles, portable electronic devices, and large-scale energy storage power stations.

[0003] In existing lithium battery modules, the module housing and baffle are mostly fixedly connected as one piece and cannot be disassembled, making it difficult to maintain the lithium battery module. At the same time, the lithium battery module has poor heat dissipation, which is not conducive to the long-term use of the lithium battery module.

[0004] The existing patent (publication number: CN210897432U) discloses a lithium battery module that is easy to install and disassemble, facilitating maintenance of the lithium battery module. At the same time, the heat generated by the battery pack during use is concentrated in the heat dissipation channel, improving the heat dissipation effect of the lithium battery module and helping to extend its service life.

[0005] To address the aforementioned issues, existing patents have provided solutions. However, these lithium battery modules rely solely on air convection for heat dissipation, making it difficult to quickly dissipate heat from the central area of ​​the battery. This can lead to temperature gradients over long periods, affecting battery consistency and making it difficult to meet the heat dissipation requirements of scenarios such as prolonged high-load operation. Furthermore, they neglect the volume change characteristics of lithium batteries during charging and discharging, which may result in deformation of the battery casing or even damage to the internal structure, thereby severely impacting battery performance consistency and lifespan.

[0006] To address this, a lithium battery module and a lithium battery are proposed. Utility Model Content

[0007] The purpose of this utility model is to provide a lithium battery module and lithium battery that can solve the problems of existing lithium battery modules relying solely on air convection for heat dissipation, which makes it difficult to quickly dissipate heat in the middle area of ​​the battery. This can lead to temperature gradients after long-term use, affecting battery consistency and making it difficult to meet the heat dissipation requirements of scenarios such as long-term high-load operation. At the same time, it ignores the volume change characteristics of lithium batteries during charging and discharging, which may lead to deformation of the battery shell or even damage to the internal structure, thereby seriously affecting the consistency of battery performance and service life.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a lithium battery module and a lithium battery, comprising a housing and a lithium battery cell, wherein a limiting component is provided inside the housing, the limiting component includes a fixing plate, and a heat dissipation component is provided inside the fixing plate;

[0009] The heat dissipation assembly includes a bonding plate with flow channels inside. The flow channels are arranged in a serpentine shape and are evenly distributed inside the bonding plate. The two ends of the flow channels are respectively fixedly connected to an inlet pipe and an outlet pipe, and both the inlet pipe and the outlet pipe are fixedly connected to an external circulating cooling device.

[0010] Preferably, the fixing plate is fixedly connected to the inside of the housing, and the number of fixing plates is set to multiple and evenly distributed.

[0011] Preferably, the bonding plate is disposed between two adjacent fixing plates, and the side of the lithium battery cell closest to the bonding plate is in close contact with the bonding plate.

[0012] Preferably, a telescopic rod is fixedly connected to one side of the fixed plate and the bonding plate, and a spring is sleeved on the surface of the telescopic rod, with the two ends of the spring being fixedly connected to the fixed plate and the bonding plate respectively.

[0013] Preferably, a mounting base frame is fixedly connected to the bottom of the housing, a support plate is fixedly connected inside the mounting base frame, and a fan is fixedly connected inside the support plate.

[0014] Preferably, a filter screen is fixedly connected inside the mounting base frame, and the filter screen is located below the fan.

[0015] Preferably, the bottom of the housing has multiple through holes, which are used in conjunction with a fan.

[0016] Preferably, a top plate is bolted to the top of the housing, and a heat outlet hole is provided on the top of the top plate, with a dustproof mesh installed inside the heat outlet hole.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. By setting up a heat dissipation component, the bonding plate can be tightly bonded to the side of the lithium battery cell, and the serpentine flow channel layout can cover the entire side area of ​​the lithium battery cell, especially for high heat-generating areas such as the middle of the lithium battery cell, to achieve point-to-point heat conduction, avoid local overheating of the lithium battery cell, and achieve the effect of uniform heat dissipation.

[0019] 2. This application sets a limiting component so that when the lithium battery cell expands or contracts during charging and discharging, the spring compression allows the bonding plate to move backward, avoiding rigid compression that could cause deformation of the lithium battery cell, thereby achieving the effect of adaptive lithium battery cell deformation and improving its service life. Attached Figure Description

[0020] Figure 1 This is a structural diagram of the lithium battery module and lithium battery of this utility model;

[0021] Figure 2This utility model Figure 1 Top view;

[0022] Figure 3 This utility model Figure 1 A bottom view;

[0023] Figure 4 This is a schematic diagram showing the connection between the limiting component and the bonding plate of this utility model;

[0024] Figure 5 This is a schematic diagram of the heat dissipation component of this utility model.

[0025] In the diagram, 1. Shell; 2. Lithium battery cell; 3. Limiting assembly; 301. Fixing plate; 302. Telescopic rod; 303. Spring; 4. Heat dissipation assembly; 401. Adhesive plate; 402. Flow channel; 403. Liquid inlet pipe; 404. Liquid outlet pipe; 5. Mounting base frame; 6. Support plate; 7. Fan; 8. Filter screen; 9. Through hole; 10. Top plate; 11. Heat outlet hole; 12. Dustproof net. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-5 The present invention provides the following technical solution:

[0028] A lithium battery module and a lithium battery, including a housing 1 and a lithium battery cell 2, wherein a limiting component 3 is provided inside the housing 1, the limiting component 3 includes a fixing plate 301, and a heat dissipation component 4 is provided inside the fixing plate 301.

[0029] The heat dissipation component 4 includes a bonding plate 401. The bonding plate 401 has a flow channel 402 inside. The flow channel 402 is arranged in a serpentine shape and is evenly distributed inside the bonding plate 401. The two ends of the flow channel 402 are respectively fixedly connected to an inlet pipe 403 and an outlet pipe 404. Both the inlet pipe 403 and the outlet pipe 404 are fixedly connected to an external circulating cooling device.

[0030] In this embodiment: Through the heat dissipation component 4, the bonding plate 401 can be in close contact with the side of the lithium battery cell 2, serving as a key medium for heat conduction. It can quickly absorb and transfer the heat generated by the lithium battery cell 2 to the internal flow channel 402, greatly shortening the heat transfer path and reducing thermal resistance. The serpentine flow channel 402 significantly increases the contact area and contact time between the coolant and the bonding plate 401. Compared with the straight flow channel 402, the serpentine flow channel 402 significantly extends the flow path of the coolant within the bonding plate 401, allowing the coolant to more effectively carry away the heat transferred from the lithium battery cell 2 through the bonding plate 401. The heat is absorbed, enhancing the heat exchange effect, improving heat dissipation efficiency, ensuring uniform surface temperature of the bonding plate 401, and preventing local overheating of the lithium battery cells 2. The inlet pipe 403 and outlet pipe 404 are both fixedly connected to the external circulating cooling equipment, which can form a coolant circulation path. The inlet pipe 403 is responsible for transporting the low-temperature coolant after being cooled by the cooling equipment to the flow channel 402 to provide a cold source for heat exchange. The outlet pipe 404 returns the coolant that has absorbed heat and increased in temperature to the cooling equipment to cool it down again, realizing the recycling of coolant and thus ensuring the continuous and stable progress of the heat dissipation process.

[0031] Specifically, such as Figure 2 As shown, the fixing plate 301 is fixedly connected to the inside of the housing 1, and the number of fixing plates 301 is set to multiple and evenly distributed.

[0032] Specifically, such as Figure 2 As shown, the bonding plate 401 is disposed between two adjacent fixing plates 301, and the side of the lithium battery cell 2 closest to the bonding plate 401 is in close contact with the bonding plate 401.

[0033] Specifically, such as Figure 4 As shown, telescopic rods 302 are fixedly connected to the opposite sides of the fixed plate 301 and the bonding plate 401. Springs 303 are sleeved on the surface of the telescopic rods 302, and the two ends of the springs 303 are fixedly connected to the fixed plate 301 and the bonding plate 401 respectively.

[0034] In this embodiment: Through the above configuration, the fixing plate 301 can divide the internal space of the housing 1 into multiple independent areas for precise positioning of the installation position of the lithium battery cell 2, ensuring that the lithium battery cells 2 are neatly arranged. The bonding plate 401 has its two sides in close contact with the lithium battery cell 2, allowing the heat generated by the lithium battery cell 2 to be quickly transferred to the internal flow channel 402 through the bonding plate 401, where the coolant circulation removes the heat, forming an efficient heat dissipation path. Furthermore, the bonding plate 401 and the fixing plate 301 together provide lateral restraint for the lithium battery cell 2, preventing the lithium battery cell 2 from moving laterally inside the housing 1. During charging and discharging, the lithium battery cell 2 will expand or contract in volume due to chemical reactions. The compression and elongation of the spring 303 can adapt to this volume change, avoiding rigid compression of the lithium battery cell 2 by the fixing plate 301 and the bonding plate 401, preventing damage to the outer shell or internal electrode structure of the lithium battery cell 2. At the same time, the preload of the spring 303 can ensure that the bonding plate 401 always maintains close contact with the lithium battery cell 2. Even if the volume of the lithium battery cell 2 changes slightly, the elasticity of the spring 303 can compensate for the gap, maintain the contact pressure required for heat conduction, and avoid a decrease in heat dissipation efficiency due to loose contact.

[0035] Specifically, such as Figure 3 As shown, a mounting base frame 5 is fixedly connected to the bottom of the housing 1, a support plate 6 is fixedly connected inside the mounting base frame 5, and a fan 7 is fixedly connected inside the support plate 6.

[0036] Specifically, such as Figure 3 As shown, a filter screen 8 is fixedly connected inside the mounting base frame 5, and the filter screen 8 is located below the fan 7.

[0037] In this embodiment: With the above settings, the mounting base 5 can provide a mounting foundation for the support plate 6, fan 7 and filter 8, enhancing the overall structural stability. The support plate 6 is used to support and fix the fan 7, ensuring that the fan 7 remains stable during operation and avoiding vibration affecting the internal structure of the housing 1. The fan 7 accelerates airflow through forced convection, which can discharge the heat generated by the lithium battery cell 2 inside the housing 1 through the through hole 9 and the heat outlet hole 11, assisting the heat dissipation component 4 in improving the overall heat dissipation efficiency and further improving the heat dissipation effect. The filter 8 can filter dust, particles and other impurities in the air, preventing foreign objects from entering the housing 1 through the fan 7, avoiding contamination of the lithium battery cell 2 or blockage of the heat dissipation channel.

[0038] Specifically, such as Figure 3 As shown, the bottom of the housing 1 has a through hole 9 and the number of through holes 9 is set to be multiple. The through holes 9 are used in conjunction with the fan 7.

[0039] Specifically, such as Figure 1 , Figure 3As shown, a top plate 10 is bolted to the top of the housing 1. A heat outlet hole 11 is provided on the top of the top plate 10, and a dustproof mesh 12 is provided inside the heat outlet hole 11.

[0040] In this embodiment: With the above settings, the through hole 9 can cooperate with the bottom fan 7 to form a forced air intake path. When the fan 7 is running, cold air can enter the interior of the housing 1 through the through hole 9 and work together with the liquid cooling heat dissipation of the bonding plate 401. The bottom air cooling can remove the heat accumulated at the bottom of the lithium battery cell 2, make up for the possible heat dissipation blind spots of the heat dissipation component 4, and make the overall temperature distribution of the lithium battery cell 2 more uniform. The top plate 10 is fixedly connected to the top of the housing 1 by bolts, which can form a closed box structure to ensure the overall rigidity of the lithium battery module. The heat outlet hole 11 serves as an exhaust outlet. When the fan 7 is running, the hot air inside the housing 1 can be quickly discharged through the heat outlet hole 11, thereby improving the heat dissipation efficiency. The dustproof net 12 set in the heat outlet hole 11 can prevent external dust, insects, etc. from entering the interior of the housing 1, forming a double dustproof protection with the bottom filter 8.

[0041] Working principle: When the lithium battery module is in use, after the external circulating cooling equipment is started, the coolant will flow from the inlet pipe 403 into the serpentine flow channel 402 of the bonding plate 401. It will absorb heat through the contact surface between the bonding plate 401 and the lithium battery cell 2. The heated coolant will flow back to the cooling equipment from the outlet pipe 404 to cool down, forming a circulation. At the same time, the fan 7 will draw in cold air from the outside through the bottom filter screen 8, enter the interior of the housing 1 through the through hole 9, and carry away heat through the gap between the lithium battery cells 2. The hot air will be discharged through the heat outlet hole 11 of the top plate 10, further improving the heat dissipation effect. The telescopic rod 302 and the spring 303 will automatically adjust the distance when the lithium battery cell 2 is charging and discharging, so that the bonding plate 401 keeps in close contact with the lithium battery cell 2, avoiding poor contact or squeezing damage caused by deformation of the lithium battery cell 2.

[0042] It should be noted that the specific structure, working principle and usage method of the circulating refrigeration equipment involved in this application are all existing technologies, and therefore have not been elaborated in the text.

[0043] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lithium battery module and a lithium battery, comprising a casing (1) and a lithium battery cell (2), characterized in that: The housing (1) is provided with a limiting component (3), the limiting component (3) includes a fixing plate (301), and the fixing plate (301) is provided with a heat dissipation component (4). The heat dissipation component (4) includes a bonding plate (401), and a flow channel (402) is provided inside the bonding plate (401). The flow channel (402) is arranged in a serpentine shape and is evenly distributed inside the bonding plate (401). The two ends of the flow channel (402) are respectively fixedly connected to an inlet pipe (403) and an outlet pipe (404). The inlet pipe (403) and the outlet pipe (404) are both fixedly connected to an external circulating cooling device.

2. The lithium battery module and lithium battery according to claim 1, characterized in that: The fixing plate (301) is fixedly connected to the inside of the shell (1), and the number of fixing plates (301) is set to multiple and evenly distributed.

3. The lithium battery module and lithium battery according to claim 1, characterized in that: The bonding plate (401) is disposed between two adjacent fixing plates (301), and the side of the lithium battery cell (2) closest to the bonding plate (401) is in close contact with the bonding plate (401).

4. The lithium battery module and lithium battery according to claim 1, characterized in that: Telescopic rods (302) are fixedly connected to the opposite sides of the fixed plate (301) and the bonding plate (401). A spring (303) is sleeved on the surface of the telescopic rod (302), and the two ends of the spring (303) are fixedly connected to the fixed plate (301) and the bonding plate (401) respectively.

5. A lithium battery module and lithium battery according to claim 1, characterized in that: The bottom of the housing (1) is fixedly connected to a mounting base frame (5), and a support plate (6) is fixedly connected inside the mounting base frame (5). A fan (7) is fixedly connected inside the support plate (6).

6. A lithium battery module and lithium battery according to claim 5, characterized in that: The mounting base frame (5) is fixedly connected to a filter screen (8), and the filter screen (8) is located below the fan (7).

7. A lithium battery module and lithium battery according to claim 5, characterized in that: The bottom of the housing (1) is provided with a through hole (9) and the number of through holes (9) is set to multiple. The through hole (9) is used in conjunction with the fan (7).

8. A lithium battery module and lithium battery according to claim 1, characterized in that: The top of the housing (1) is bolted with a top plate (10), and the top of the top plate (10) is provided with a heat outlet hole (11) and a dustproof net (12) is provided inside the heat outlet hole (11).

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