Structure of pole liquid cooling energy storage battery pack

Abstract

The utility model provides a structure of a pole liquid cooling energy storage battery pack, which comprises a battery box, the battery box comprises an outer box body, a fixing frame is arranged in the outer box body, a battery assembly is arranged in the battery box, the battery assembly comprises a plurality of battery packs, and each battery pack comprises a plurality of battery bodies. According to the utility model, the heat conduction seat made of heat conduction ceramic with high heat conduction efficiency is arranged between the snake-shaped liquid cooling pipe and the insulation pad, so that the heat dissipation efficiency is effectively improved, and compared with the traditional heat conduction glue filling in the background technology, the heat dissipation efficiency is higher; further, the battery assembly is placed on the fixing frame and is fixed on the fixing frame through the end plate, the middle end plate, the packing belt and other components, so that a certain gap is formed between the outer box body and the battery body, and heat dissipation and diffusion of the battery body are facilitated.

Description

Technical Field

[0001] The utility model relates to a structure of a pole liquid-cooled energy storage battery pack, belonging to the technical field of energy storage battery packs. Background Art

[0002] The thermal management systems for lithium battery packs currently used in the market are mainly divided into four categories: natural cooling, air cooling, liquid cooling, and direct cooling. Antifreeze cooling technology uses antifreeze convection heat exchange to remove the heat generated by the battery and reduce the battery temperature. The antifreeze medium has a high heat transfer coefficient, large heat capacity, and fast cooling speed. It has a significant effect on reducing the maximum temperature and improving the consistency of the battery pack temperature field. At the same time, the volume of the thermal management system is relatively small. The liquid cooling system is more flexible: the battery cells or modules can be immersed in antifreeze, cooling channels can be set between battery modules, or cooling plates can be used at the bottom of the battery.

[0003] A Chinese utility model patent with announcement number CN219998344U discloses a battery pack with cell pole surface cooling, including a battery module and a box body, the battery module including a cell stack, a tray and a bus, the cell stack is formed by stacking a number of cells and insulating spacers along the thickness direction of the cells, the bus is installed on the tray, and the bus is electrically connected to the poles of the cells; it is characterized in that: the battery pack also includes a cooling plate, a thermally conductive structural adhesive and an insulating sheet, the cooling plate and the bus are separated by an insulating sheet, and the cooling plate and the insulating sheet, and the bus and the insulating sheet are filled with thermally conductive structural adhesive.

[0004] In the above patent, thermal conductive structural adhesive is filled between the cooling plate, the bus bar and the insulating sheet. However, the thermal conductivity of traditional thermal conductive adhesive is generally below 10W / mK, and the thermal conductivity efficiency is low. Utility Model Content

[0005] Based on the above background, the purpose of the present invention is to provide a structure of a pole liquid-cooled energy storage battery pack to solve the problems described in the background technology.

[0006] In order to achieve the above-mentioned utility model purpose, the utility model provides the following technical solutions:

[0007] A structure of a pole liquid-cooled energy storage battery pack, comprising a battery box, a battery assembly is arranged in the battery box, a busbar assembly is arranged on the battery assembly, an insulating assembly is arranged on the top of the busbar assembly, a heat conduction assembly is arranged on the top of the insulating assembly, and a heat exchange assembly is inserted into the heat conduction assembly;

[0008] Battery box: comprising an outer box body, wherein a fixing frame is arranged inside the outer box body;

[0009] Battery assembly: includes a number of battery packs, each of which includes a number of battery bodies, each of which is provided with a pole, the battery packs are evenly distributed in the outer box, an end plate is provided between two adjacent battery packs in a horizontal direction among the battery packs, and an intermediate end plate is provided at both ends of the battery packs in a horizontal direction among the battery packs, the end plates and the intermediate end plates are fixedly connected to the fixing frame, a strapping tape is provided on the outside of the intermediate end plate near the top, and the battery packs in a horizontal row among the battery packs are fixed in position by the strapping tape.

[0010] Preferably, the bus assembly includes a bus bar, which is composed of a plurality of bus seats, with guide plates at both ends of the bus seat, an inverted U-shaped connecting piece in the middle of the bus seat, and the connecting piece and the guide plate being integrally formed, and the guide plates at both ends of the bus seat are electrically connected to the positive and negative poles on two adjacent battery bodies respectively.

[0011] Preferably, the insulating assembly includes a plurality of insulating pads, and the plurality of insulating pads are respectively arranged on top of a plurality of guide plates, and the plurality of insulating pads are all thermally conductive silicone pads.

[0012] Preferably, the heat-conducting assembly comprises a plurality of heat-conducting seats, which are respectively arranged on the top of the insulating pads, are all made of heat-conducting ceramics, and are all provided with through holes.

[0013] Preferably, the heat exchange component includes a serpentine liquid cooling tube, which passes through the through hole and has its outer tube wall in contact with the inner wall of the through hole. One end of the serpentine liquid cooling tube is provided with a liquid inlet joint, and the other end of the serpentine liquid cooling tube is provided with a liquid outlet joint. The liquid inlet joint and the liquid outlet joint are respectively fixedly connected to one side of the outer box body.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The utility model discloses a structure of a pole liquid-cooled energy storage battery pack, which effectively increases the heat dissipation efficiency by arranging a heat-conducting seat made of high-thermal-conductivity thermal-conductive ceramic between a serpentine liquid-cooling tube and an insulating pad. Compared with the filling by traditional thermal-conductive adhesive mentioned in the background technology, the heat dissipation efficiency is higher. Furthermore, in the utility model, the battery assembly is placed on a fixing frame and fixed on the fixing frame by components such as end plates, middle end plates and packing tapes, so that a certain gap is provided between the outer box and the battery body, which is beneficial for the heat dissipation of the battery body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 This utility model Figure 1 Schematic diagram of the explosion diagram;

[0019] Figure 3 This utility model Figure 2 Enlarged view of part A in the middle.

[0020] In the figure: 1. battery box; 101. outer box body; 102. fixing frame; 2. battery assembly; 201. battery pack; 202. battery body; 203. pole; 204. end plate; 205. middle end plate; 206. packing tape; 3. bus assembly; 301. bus; 302. bus seat; 303. guide plate; 304. connector; 4. insulation assembly; 401. insulation pad; 5. heat conduction assembly; 501. heat conduction seat; 502. through hole; 6. heat exchange assembly; 601. serpentine liquid cooling pipe; 602. liquid inlet joint; 603. liquid outlet joint. DETAILED DESCRIPTION

[0021] The technical solution of the utility model is further described in detail below through specific embodiments and in combination with the accompanying drawings. It should be understood that the implementation of the utility model is not limited to the following embodiments, and any form of modification and / or change made to the utility model will fall within the protection scope of the utility model.

[0022] In the present invention, unless otherwise specified, all parts and percentages are weight units, and the equipment and raw materials used can be purchased from the market or are commonly used in the field. The methods in the following embodiments, unless otherwise specified, are conventional methods in the field. The components or equipment in the following embodiments, unless otherwise specified, are universal standard parts or components known to those skilled in the art, and their structures and principles are known to those skilled in the art through technical manuals or conventional experimental methods.

[0023] The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. In the following detailed description, for ease of explanation, many specific details are described to provide a comprehensive understanding of the embodiments of the present invention. However, one or more embodiments may also be implemented by those skilled in the art without these specific details.

[0024] like Figure 1-Figure 3 As shown, a structure of a pole liquid-cooled energy storage battery pack includes a battery box 1, the battery box 1 includes an outer box body 101, a fixing frame 102 is arranged inside the outer box body 101, a battery assembly 2 is arranged in the battery box 1, the battery assembly 2 includes a plurality of battery packs 201, the plurality of battery packs 201 each include a plurality of battery bodies 202, a pole 203 is arranged on the plurality of battery bodies 202, the plurality of battery packs 2 are evenly distributed in the outer box body 101, and an end plate 204 is arranged between two adjacent battery packs 201 in a horizontal direction among the plurality of battery packs 201. The horizontal battery packs 201 in the dry battery pack 201 are provided with intermediate end plates 205 at both ends, the end plates 204 and the intermediate end plates 205 are fixedly connected to the fixing frame 102, and a packing tape 206 is provided near the top of the outside of the intermediate end plate 205. The battery packs 201 in a horizontal row among the battery packs 201 are fixed in position by the packing tape 206, a bus assembly 3 is provided on the battery assembly 2, an insulating assembly 4 is provided on the top of the bus assembly 3, a heat conducting assembly 5 is provided on the top of the insulating assembly 4, and a heat exchange assembly 6 is inserted into the heat conducting assembly 5.

[0025] Battery box 1: provides shell protection for the utility model; fixing frame 102: on the one hand, is used to place battery assembly 2, on the other hand, is fixedly connected with end plate 204 and middle end plate 205 to fix the position of battery assembly 2 in battery box 1, and the battery assembly 2 is placed on the fixing frame 102 so that there is a certain gap between the battery body 202 and the outer box body 101, which is conducive to the heat dissipation of the battery body 202; battery assembly 2: is composed of several battery bodies 202 electrically connected via busbar 302, and is used to store electric energy ; Pole 203: used for electrical connection between battery bodies 202, further providing a way for charging and discharging of battery bodies 202; end plates 204, intermediate end plates 205 and strapping tape 206: the first two will be used to pad insulating material components between the battery body 202 and each end plate 204 and the intermediate end plate 205 during assembly, and the strapping tape 206 will be covered with heat shrinkable tube insulation on its surface during production, thereby achieving insulation between the three and the battery body 202; the intermediate end plate 205 will be used when the overall length of the horizontal battery packs 201 exceeds The long end plate 205 is used to separate two adjacent battery packs 201 and is provided with a long through hole for convenient fixed connection with the fixing frame 102. When the overall length of the horizontal battery pack 201 is short, the middle end plate 205 may not be added. The end plate 204 is located at both ends of the overall horizontal battery packs 201 and is provided with a long through hole for convenient fixed connection with the fixing frame 102. The battery assembly 2 is positioned on the fixing frame 102. The strapping tape 206 is provided to fix each horizontal battery pack 201 and the end plate 204; the busbar assembly 3 : Used to connect the positive and negative poles 203 between two adjacent battery bodies 202, so as to electrically connect the battery bodies 202 to achieve the effect of convergence; Insulation component 4: Used to isolate the current and conduct the heat generated by the poles 203 on the battery body 202 during the convergence process; Heat conduction component 5: Used to conduct and diffuse the heat of the insulation component 4; Heat exchange component 6: Transports the heat in the heat conduction component 5 through the antifreeze circulating in the serpentine liquid cooling tube 601 to exchange heat with the liquid cooling unit, thereby achieving the purpose of heat dissipation.

[0026] It is worth noting that: in the present invention, a box cover (not shown in the present invention) for covering the outer box body 101 is arranged on the top of the outer box body 101 .

[0027] Furthermore, the bus assembly 3 includes a bus bar 301, which is composed of a plurality of bus seats 302, with guide plates 303 at both ends of the bus seat 302, and an inverted U-shaped connector 304 in the middle of the bus seat 302. The connector 304 and the guide plates 303 are integrally formed, and the guide plates 303 at both ends of the bus seat 302 are respectively electrically connected to the positive and negative poles 203 on the two adjacent battery bodies 202. The guide plates 303 and the connector 304 are integrally formed and are both made of conductive materials, electrically connecting the positive and negative poles 203 on the two adjacent battery bodies 202, so that the current between each battery body 202 can be converged.

[0028] Furthermore, the insulating assembly 4 includes a plurality of insulating pads 401, which are respectively arranged on the top of the plurality of guide plates 303, and the plurality of insulating pads 401 are all thermally conductive silicone pads. The insulating pads 401 made of thermally conductive silicone pads can be insulated and can also be thermally conductive, and can conduct the heat generated by the current convergence on the pole 203.

[0029] Furthermore, the heat conducting assembly 5 includes a plurality of heat conducting seats 501, which are respectively arranged on the top of the insulating pad 401, and the plurality of heat conducting seats 501 are all made of heat conducting ceramics, and the plurality of heat conducting seats 501 are all provided with through holes 502. The heat conducting seats 501 made of heat conducting ceramics have higher heat conducting efficiency than traditional heat conducting adhesives, and the thermal conductivity of heat conducting ceramics can reach 170-230W / mK.

[0030] Further, the heat exchange component 6 includes a serpentine liquid cooling tube 601, which passes through the through hole 502, and its outer tube wall is in contact with the inner wall of the through hole 502. A liquid inlet joint 602 is provided at one end of the serpentine liquid cooling tube 601, and a liquid outlet joint 603 is provided at the other end of the serpentine liquid cooling tube 601. The liquid inlet joint 602 and the liquid outlet joint 603 are respectively fixedly connected to one side of the outer box body 101. The serpentine liquid cooling tube 601 passes through the through hole 502 opened on the heat conducting seat 501, and its outer tube wall is in contact with the inner wall of the through hole 502 of the heat conducting seat 501, so that the antifreeze liquid flowing into the serpentine cooling tube from the liquid inlet joint 602 can absorb the heat on the heat conducting seat 501 and finally flow out from the liquid outlet joint 603 to perform heat exchange with the external liquid cooling unit, thereby achieving the purpose of rapid heat dissipation.

[0031] The working principle of the structural design of the pole 203 liquid-cooled energy storage battery pack 201 of the utility model is:

[0032] When the battery body 202 is being charged or discharged, the pole 203 on the battery body 202 emits heat, and the heat passes through the guide plate 303, the insulating pad 401 made of thermally conductive silicone pad material, and the thermal seat 501 made of thermally conductive ceramics in sequence, and is finally absorbed by the antifreeze liquid with fast heat transfer and good cooling effect in the serpentine liquid cooling tube 601, and then brought out for heat exchange with the external liquid cooling unit, thereby realizing the conduction and diffusion of heat generated by the pole 203 on the battery body 202 in the utility model; in the utility model, the thermal seat 501 made of thermally conductive ceramics with high thermal conductivity is arranged between the serpentine liquid cooling tube 601 and the insulating pad 401, thereby effectively increasing the heat dissipation efficiency. Compared with the filling by traditional thermal conductive glue mentioned in the background technology, the heat dissipation efficiency is higher.

[0033] It is worth noting that the liquid cooling unit is a prior art and is not described in detail in this invention.

[0034] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A structure of a pole liquid-cooled energy storage battery pack, characterized in that: The battery box (1) comprises a battery assembly (2) arranged in the battery box (1), a current collector assembly (3) arranged on the battery assembly (2), an insulating assembly (4) arranged on the top of the current collector assembly (3), a heat conduction assembly (5) arranged on the top of the insulating assembly (4), and a heat exchange assembly (6) inserted into the heat conduction assembly (5); The battery box (1) comprises an outer box body (101), wherein a fixing frame (102) is arranged inside the outer box body (101); The battery assembly (2) comprises a plurality of battery groups (201), each of the battery groups (201) comprising a plurality of battery bodies (202), each of the battery bodies (202) being provided with a pole (203), the plurality of battery groups (2) being evenly distributed in the outer box (101), an end plate (204) being provided between two adjacent battery groups (201) in a horizontal direction among the plurality of battery groups (201), an intermediate end plate (205) being provided at both left and right ends of the battery groups (201) in a horizontal direction among the plurality of battery groups (201), the end plate (204) and the intermediate end plate (205) being fixedly connected to the fixing frame (102), a strapping tape (206) being provided near the top of the outside of the intermediate end plate (205), and the battery groups (201) in a horizontal row among the plurality of battery groups (201) being fixed in position by the strapping tape (206).

2. The structure of a column liquid-cooled energy storage battery pack according to claim 1, characterized in that: The bus assembly (3) comprises a bus bar (301), wherein the bus bar (301) is composed of a plurality of bus seats (302), wherein the two ends of the bus seat (302) are guide plates (303), and the middle of the bus seat (302) is an inverted U-shaped connecting piece (304), wherein the connecting piece (304) and the guide plates (303) are integrally formed, and the guide plates (303) at the two ends of the bus seat (302) are respectively electrically connected to the positive and negative poles (203) on two adjacent battery bodies (202).

3. The structure of a column liquid-cooled energy storage battery pack according to claim 1, characterized in that: The insulating assembly (4) comprises a plurality of insulating pads (401), wherein the plurality of insulating pads (401) are respectively arranged on the top of a plurality of guide plates (303), and the plurality of insulating pads (401) are all thermally conductive silicone pads.

4. The structure of a column liquid-cooled energy storage battery pack according to claim 3, characterized in that: The heat-conducting assembly (5) comprises a plurality of heat-conducting seats (501), wherein the plurality of heat-conducting seats (501) are respectively arranged on the top of the insulating pad (401), the plurality of heat-conducting seats (501) are all heat-conducting ceramics, and the plurality of heat-conducting seats (501) are all provided with through holes (502).

5. The structure of a column liquid-cooled energy storage battery pack according to claim 4, characterized in that: The heat exchange component (6) includes a serpentine liquid cooling tube (601), each of which passes through the through hole (502), and its outer tube wall is in contact with the inner wall of the through hole (502). One end of the serpentine liquid cooling tube (601) is provided with a liquid inlet joint (602), and the other end of the serpentine liquid cooling tube (601) is provided with a liquid outlet joint (603). The liquid inlet joint (602) and the liquid outlet joint (603) are respectively fixedly connected to one side of the outer box body (101).

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