Enhanced lithium ion power battery for electric automobile

Abstract

The utility model belongs to the technical field of power batteries, and particularly relates to a reinforced lithium ion power battery for an electric automobile, which comprises a bottom plate, battery cell components are placed on the bottom plate, two battery cell components form a group, a temperature adjusting component is arranged outside each group of battery cell components, an end protecting plate component is connected onto the bottom plate, and the end protecting plate component is connected with a battery pack. The end protection plate assemblies are matched with the two ends of the battery cell assembly; the temperature adjusting assembly comprises C-shaped thin tubes, each C-shaped thin tube wraps a group of battery cell assemblies, connecting ends are arranged at two ends of each C-shaped thin tube, a rubber ring is placed between two corresponding adjacent connecting ends on two adjacent C-shaped thin tubes, connecting lugs are arranged at the upper ends and the lower ends of the connecting ends, and the rubber rings are connected with the connecting lugs. And the connecting lugs on the two adjacent connecting ends correspondingly clamping the rubber ring are connected through a bolt. According to the utility model, the damaged battery cell is simpler to replace, and the heat exchange of the power battery module is simpler.

Description

Technical Field

[0001] This utility model belongs to the field of power battery technology, specifically relating to an enhanced lithium-ion power battery for electric vehicles. Background Technology

[0002] Traditional lithium-ion batteries mostly adopt a modular design, assembling multiple cells into modules and then integrating them into a battery pack. This design results in a complex internal structure of the battery pack, with connectors and brackets between modules occupying a lot of space, reducing the overall space utilization rate. Replacing damaged cells in the battery module is also quite troublesome, as is heat exchange of the battery module. To address these issues, this invention proposes a reinforced lithium-ion power battery for electric vehicles. Utility Model Content

[0003] The purpose of this invention is to provide a reinforced lithium-ion power battery for electric vehicles, which simplifies the replacement of damaged cells and the heat exchange of the power battery module.

[0004] The specific technical solution adopted by this utility model is as follows:

[0005] An enhanced lithium-ion power battery for electric vehicles includes a base plate on which a cell assembly is placed. Two cell assemblies form a group. Each group of cell assemblies is provided with a temperature regulating component on its exterior. An end guard plate assembly is connected to the base plate and is adapted to both ends of the cell assembly.

[0006] The temperature regulation component includes a C-shaped thin tube, each of which encloses a set of battery cells. The C-shaped thin tube has connecting ends at both ends. A rubber ring is placed between two adjacent connecting ends on two adjacent C-shaped thin tubes. Connecting ears are provided at the top and bottom of the connecting ends. The connecting ears on two adjacent connecting ends that clamp the rubber ring are connected by bolts.

[0007] Preferably, the C-shaped thin tube has a U-shaped cross-section, the height of the middle part of the C-shaped thin tube is half of the total height, and the height of the connecting end is half of the total height.

[0008] Preferably, the battery cell assembly includes a blade battery cell, with protruding limiting blocks at the lower ends of both ends of the blade battery cell, a positive electrode solder joint and a negative electrode solder joint on the side of the blade battery cell, and a conductive welding rod welded between the positive electrode solder joint of the blade battery cell and the negative electrode solder joint of the adjacent blade battery cell on one side, the conductive welding rod being inclined.

[0009] Preferably, the end guard assembly includes a first guard plate, the lower surface of the first guard plate is attached to the upper surface of the limiting block, and an insulating sleeve is provided on one surface of the first guard plate. The insulating sleeve is inclined and covers the conductive welding rod and the positive and negative welding points at both ends of it.

[0010] Preferably, the lower end of the first guard plate is connected to a plurality of bolt blocks, each bolt block being located between two adjacent limiting blocks, and the bolt blocks being detachably connected to the threaded holes opened on the base plate by bolts.

[0011] Preferably, the first protective plate is bolted to both ends to form a second protective plate, and the sidewall of the second protective plate is fitted to the sidewall of the corresponding C-shaped thin tube.

[0012] The technical effects achieved by this utility model are as follows:

[0013] In this invention, when assembling a power battery module, battery cell assemblies are placed sequentially, with two assemblies forming a group. A set of C-shaped thin tubes is fitted onto each group of battery cell assemblies at intervals. A rubber ring is placed between the two adjacent connecting ends of two adjacent C-shaped thin tubes. The connecting lugs on the two adjacent connecting ends that hold the rubber ring are connected by bolts, completing the assembly of the battery cell assembly and the C-shaped thin tubes. Then, the positive electrode solder joint of the blade battery cell is welded to the negative electrode solder joint of the adjacent blade battery cell on one side using conductive welding rods. The negative electrode solder joint of the outermost blade battery cell is connected to the positive electrode solder joint of the outermost blade battery cell on the other side and connected to the power vehicle system circuit. Alternatively, multiple power vehicle modules can be connected in series or parallel. The circuit connection is set according to actual needs and will not be elaborated here. Then, a surface is set... The first protective plate with an insulating sleeve is aligned with the ends of all the battery cell components, ensuring that each insulating sleeve covers the conductive welding rod and the positive and negative welding points at both ends. At the same time, the first protective plate presses down on the limiting block and is then detachably connected to the base plate via bolts. The other first protective plate is aligned with the other end of all the battery cell components and presses down on the limiting block at the other end. It is then detachably connected to the base plate via bolts. Finally, the second protective plate is bolted to the first protective plate to complete the enclosure and the assembly of the power battery module. When it is necessary to replace a damaged blade battery cell, first remove the second protective plate, then remove the first protective plate, cut and grind the two adjacent conductive welding rods, and directly remove the damaged conductive battery cell. Replacing the damaged battery cell is simpler, and heat exchange of the power battery module is also simpler. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a reinforced lithium-ion power battery for electric vehicles according to this utility model;

[0015] Figure 2This is a schematic diagram of the overall structure of a reinforced lithium-ion power battery for electric vehicles without the first protective plate installed.

[0016] Figure 3 This is a schematic diagram of the overall structure of a reinforced lithium-ion power battery for electric vehicles without the end guard plate assembly and the second guard plate installed.

[0017] Figure 4 This is a schematic diagram of the overall structure of a reinforced lithium-ion power battery for electric vehicles from another perspective.

[0018] Figure 5 This is a top view schematic diagram of the cell assembly and temperature regulation assembly in a reinforced lithium-ion power battery for electric vehicles according to this utility model.

[0019] Figure 6 This is a schematic diagram of the overall structure of a C-shaped thin tube in a reinforced lithium-ion power battery for electric vehicles according to this utility model;

[0020] Figure 7 This is a schematic diagram of the overall structure of a cell assembly in a reinforced lithium-ion power battery for electric vehicles according to this utility model.

[0021] Figure 8 This is a schematic diagram of the overall structure of one of the first protective plates in a reinforced lithium-ion power battery for electric vehicles according to this utility model.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Base plate; 2. Cell assembly; 3. Temperature regulation assembly; 4. End guard plate assembly; 5. Second guard plate; 201. Blade cell; 202. Limiting block; 203. Positive electrode solder joint; 204. Negative electrode solder joint; 205. Conductive welding rod; 301. C-shaped thin tube; 302. Connecting end; 303. Rubber ring; 304. Connecting ear; 401. First guard plate; 402. Insulating sleeve; 403. Bolt block. Detailed Implementation

[0024] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0025] like Figures 1-8As shown, a reinforced lithium-ion power battery for electric vehicles includes a base plate 1, on which a cell assembly 2 is placed. Two cell assemblies 2 form a group. Each group of cell assemblies 2 is provided with a temperature regulating assembly 3 on the outside. An end guard plate assembly 4 is connected to the base plate 1. The end guard plate assembly 4 is adapted to both ends of the cell assembly 2.

[0026] like Figures 1-8 As shown, in practical use, this utility model allows for the selection of the number of battery cell groups based on the required output voltage and current of the vehicle. Consequently, the length of the base plate 1, the length of the end guard plate assembly 4, and the number of temperature regulation components 3 can all be set independently, as long as they are compatible with each other. Figure 1 As shown in the figure, this embodiment provides a structural schematic diagram of four sets of battery cell assemblies 2, which includes three temperature regulation components 3;

[0027] The temperature regulating component 3 includes a C-shaped thin tube 301, each C-shaped thin tube 301 encapsulates a set of battery cell components 2. The C-shaped thin tube 301 has a connecting end 302 at both ends. A rubber ring 303 is placed between two adjacent connecting ends 302 on two adjacent C-shaped thin tubes 301. The connecting ends 302 have connecting ears 304 at both ends. The connecting ears 304 on two adjacent connecting ends 302 that hold the rubber ring 303 are connected by bolts.

[0028] like Figures 1-8 As shown, in this embodiment, the temperature regulating component 3 is connected to the compressor air conditioning system as a transmission pipe. It can transmit cold or hot air to the C-shaped thin tube 301 as needed. The air exchanges heat with the two adjacent blade cells 201 through the tube arm of the C-shaped thin tube 301. In actual use, for example, when the temperature of the battery cell assembly 2 is too low in winter, the compressor air conditioning system is started to generate heat. By transmitting hot air into the C-shaped thin tube 301, the blade cells 201 are preheated, thereby ensuring the battery life. Similarly, in summer, when the blade cells 201 generate heat during operation, the compressor air conditioning system is started to cool them down. Cold air enters the C-shaped thin tube 301 to cool the blade cells 201, thereby preventing the blade cells 201 from overheating.

[0029] Preferably, the C-shaped thin tube 301 has a U-shaped cross-section, with the height of the middle part of the C-shaped thin tube 301 being half of the total height, and the height of the connecting end 302 being half of the total height.

[0030] like Figures 1-8 As shown, in actual use, by setting "the height of the middle part of the C-shaped thin tube 301 is half of the total height, and the height of the connecting end 302 is half of the total height", it is easier for the first guard plate 401 to press down the limiting block 202, so as to fix the blade cell on the base plate 1 more stably.

[0031] Preferably, the battery cell assembly 2 includes a blade battery cell 201. The blade battery cell 201 has protruding limiting blocks 202 at its lower ends. The blade battery cell 201 has a positive electrode solder joint 203 and a negative electrode solder joint 204 on its side. A conductive welding rod 205 is welded between the positive electrode solder joint 203 of the blade battery cell 201 and the negative electrode solder joint 204 of the blade battery cell 201 adjacent to it on one side. The conductive welding rod 205 is inclined.

[0032] like Figure 5 As shown, since the two battery cell assemblies 2 form a group, by setting C-shaped thin tubes 301 connected in sequence, each blade battery cell 201 has a surface that is in contact with a side surface of the C-shaped thin tube 301, thereby ensuring the heat exchange effect of the blade battery cell 201.

[0033] Preferably, the end guard plate assembly 4 includes a first guard plate 401, the lower surface of the first guard plate 401 is attached to the upper surface of the limiting block 202, and one of the first guard plates 401 is provided with an insulating sleeve 402 on one surface. The insulating sleeve 402 is inclined and covers the conductive welding rod 205 and the positive electrode welding point 203 and the negative electrode welding point 204 at both ends of it.

[0034] In this utility model, by setting an insulating sleeve 402, and the insulating sleeve 402 covering the conductive welding rod 205 and the positive electrode welding point 203 and negative electrode welding point 204 at both ends, the welding point is made safer. The first protective plate 401 can not only fix and limit the blade battery cell 201, but also protect the blade battery cell 201.

[0035] Preferably, the lower end of the first guard plate 401 is connected to a plurality of bolt blocks 403, each bolt block 403 being located between two adjacent limit blocks 202, and the bolt blocks 403 being detachably connected to the threaded holes opened on the base plate 1 by bolts.

[0036] like Figures 1-8 As shown, in this utility model, since the bolt block 403 is detachably connected to the base plate 1 by bolts, it is easier to remove the first protective plate 401 and then replace the damaged blade battery cell 201.

[0037] Preferably, the first protective plate 401 is bolted to both ends with a second protective plate 5, and the sidewall of the second protective plate 5 fits against the sidewall of the corresponding C-shaped thin tube 301. The second protective plate 5 and the first protective plate 401 enclose and fix the entire power battery module. The C-shaped thin tube 301 also protects against contact between two adjacent blade cells 201.

[0038] like Figures 1-8As shown, the working principle of this utility model is as follows: When assembling the power battery module, the cell assembly 2 is placed sequentially, with two cell assemblies 2 forming a group. A C-shaped thin tube 301 is fitted onto each group of cell assemblies 2 at intervals. A rubber ring 303 is placed between the two adjacent connecting ends 302 of two adjacent C-shaped thin tubes 301. The connecting ears 304 on the two adjacent connecting ends 302 that hold the rubber ring 303 are connected by bolts to complete the assembly of the cell assembly 2 and the C-shaped thin tube 301. Then, the positive electrode solder point 203 of the blade cell 201 is welded to the negative electrode solder point 204 of the adjacent blade cell 201 on one side using a conductive welding rod 205. The negative electrode solder point 204 of the outermost blade cell 201 is connected to the positive electrode solder point 203 of the outermost blade cell 201 on the other side and connected to the power vehicle system circuit. Alternatively, multiple power vehicle modules can be connected in series or in parallel. The circuit connection here is set according to actual needs. The details are omitted here. Then, a first protective plate 401 with an insulating sleeve 402 on its surface is aligned with the ends of all the battery cell assemblies 2, ensuring that each insulating sleeve 402 covers the conductive welding rod 205 and the positive electrode welding point 203 and negative electrode welding point 204 at both ends. At the same time, the first protective plate 401 presses down the limiting block 202, and then is detachably connected to the base plate 1 by bolts through bolt block 403. Another first protective plate 401 is aligned with the other end of all the battery cell assemblies 2, and the limiting block 202 at the other end is pressed down. Then, it is detachably connected to the base plate 1 by bolts through bolt block 403. Finally, the second protective plate 5 is connected to the first protective plate 401 by bolts to complete the enclosure and complete the assembly of the power battery module. When it is necessary to replace the damaged blade battery cell 201, first remove the second protective plate 5, then remove the first protective plate 401, cut and grind the two adjacent conductive welding rods 205, and directly remove the damaged conductive battery cell 201.

[0039] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A reinforced lithium-ion power battery for electric vehicles, characterized in that: Includes a base plate (1), on which a battery cell assembly (2) is placed, two battery cell assemblies (2) form a group, and a temperature regulating assembly (3) is provided on the outside of each group of battery cell assemblies (2). An end guard plate assembly (4) is connected to the base plate (1), and the end guard plate assembly (4) is adapted to both ends of the battery cell assembly (2). The temperature regulating component (3) includes a C-shaped thin tube (301), each of which encloses a set of battery cell components (2). The C-shaped thin tube (301) has connecting ends (302) at both ends. A rubber ring (303) is placed between two adjacent connecting ends (302) on two adjacent C-shaped thin tubes (301). Connecting ears (304) are provided at the upper and lower ends of the connecting ends (302). The connecting ears (304) on two adjacent connecting ends (302) that clamp the rubber ring (303) are connected by bolts.

2. The reinforced lithium-ion power battery for electric vehicles according to claim 1, characterized in that: The C-shaped thin tube (301) has a U-shaped cross-section, and the height of the middle part of the C-shaped thin tube (301) is half of the total height, and the height of the connecting end (302) is half of the total height.

3. The enhanced lithium-ion power battery for electric vehicles according to claim 2, characterized in that: The battery cell assembly (2) includes a blade battery cell (201). The blade battery cell (201) has protruding limiting blocks (202) at the lower ends of both ends. The blade battery cell (201) has a positive electrode solder joint (203) and a negative electrode solder joint (204) on its side. A conductive welding rod (205) is welded between the positive electrode solder joint (203) of the blade battery cell (201) and the negative electrode solder joint (204) of the adjacent blade battery cell (201) on one side. The conductive welding rod (205) is inclined.

4. A reinforced lithium-ion power battery for electric vehicles according to claim 3, characterized in that: The end plate assembly (4) includes a first plate (401), the lower surface of the first plate (401) is attached to the upper surface of the limiting block (202), and one of the first plates (401) is provided with an insulating sleeve (402) on one surface. The insulating sleeve (402) is inclined and covers the conductive welding rod (205) and the positive electrode welding point (203) and negative electrode welding point (204) at both ends of it.

5. A reinforced lithium-ion power battery for electric vehicles according to claim 4, characterized in that: The lower end of the first guard plate (401) is connected to a number of bolt blocks (403), each bolt block (403) is located between two adjacent limit blocks (202), and the bolt block (403) is detachably connected to the threaded hole opened on the base plate (1) by bolts.

6. A reinforced lithium-ion power battery for electric vehicles according to claim 5, characterized in that: The first protective plate (401) has a second protective plate (5) connected to both ends by bolts. The side wall of the second protective plate (5) is attached to the side wall of the corresponding C-shaped thin tube (301).

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