Cooling system for battery structures in single-bay and multi-bay electric vehicles

Abstract

A battery pack (4) for use in an electric vehicle includes at least two rectangular battery cells (63, 64, 65) arranged in an array (13, 14) having longitudinal sides (33, 34) and including lateral rows (25, 26, 27, 28), and extending adjacent to each other in the length direction (L) in longitudinally extending rows (16, 17, 18, 19, respectively, and a plate-type cooling member (22) interposed between adjacent cells (63, 64, 65) in the longitudinal rows (16, 17, 18, 19) and extending in a width direction (W) from an upstream longitudinal side (33) to an opposite longitudinal side (34) of the array (13, 14). a coolant distribution duct (30) and a coolant exhaust duct (30') extending parallel to the sill members (6, 7), each of the cooling members (21, 22, 23) being connected to an inlet leading to the coolant distribution duct (30) and an outlet leading to the coolant exhaust duct (30'), the distribution duct (30) being connected to a coolant supply duct (31) and the coolant exhaust duct (30') being connected to a return duct (31'), the coolant supply duct (30) and the return duct (31') passing through the front piece (8) and / or the lateral members (9, 15).

Description

Technical Field

[0001] The present invention relates to a battery pack used for an electric vehicle. The battery pack is interconnected by two spaced-apart sill members extending in the length direction, each including a transverse front part and a transverse member extending in the width direction. At least two longitudinal rows of rectangular battery cells extend adjacent to each other in the length direction.

[0002] The present invention also relates to a cooling member used for such a battery pack and a method for manufacturing the same.

Background Art

[0003] A secondary battery-powered electric vehicle (BEV) and its power train are typically powered by an array of batteries connected in series, parallel, or a combination of both to reach the desired system output voltage window that is optimal for the efficiency of the motor and drive train. Battery cells come in various shapes such as cylindrical, rectangular, and pouch-type, and when power is consumed (acceleration) or applied (charging), heat is generated due to internal resistance. To prevent the cell temperature from exceeding a set threshold value, the generated heat is actively removed. At the set threshold temperature, the cell electrolyte is destroyed, causing permanent damage to the cell and substantially reducing the cell's lifespan.

[0004] Therefore, one of the important design parameters of a battery pack for an electric vehicle is to keep the absolute temperature below a certain limit to ensure sufficient cell lifespan and product safety. However, depending on the internal structure and manufacturing method of the cell (jelly roll winding method or lamination method), heat is not evenly distributed in all directions of the cell, and a temperature gradient is substantially generated due to high-temperature regions and low-temperature regions. It is desirable to reduce the temperature gradient as much as possible and achieve a very uniform temperature distribution across the entire cell with a reduced difference between high-temperature and low-temperature locations.

[0005] To protect the electrolyte within the battery cell from damage, when the cell temperature exceeds a set value, power input and output are typically limited (suppressed) while hotter areas of the cell simultaneously occur. This means that if a region of the cell overheats, the control hardware and software begin to suppress the protocol to protect the electrolyte. In practice, consumers most frequently experience this problem when fast charging at high voltage and high current. Normal fast charging takes between 10 and 30 minutes, depending on the type of vehicle and the output rating of the charging station. In contrast to the long charging time during power input, power output from the cell during acceleration or overtaking on an approach is a relatively short event, usually less than a minute, but can be repeated several times in shorter intervals.

[0006] To provide a better fast-charging experience (shorter charging time), the battery pack needs to have cells with an optimized internal structure and a powerful cooling system to avoid the occurrence of high-temperature areas.

[0007] Battery packs are known to have cylindrical battery cells that are cooled by a series of meandering cooling plates that extend along their length. As a result, known cooling plates can result in uneven cooling along the length of the plate, potentially creating localized hot spots.

[0008] An object of the present invention is to provide a battery pack with an effective cooling system having a substantially uniform temperature distribution when power is supplied by the battery cells and when the cells are being charged. A further object of the present invention is to provide an electric vehicle equipped with a structural battery that is relatively lightweight and rechargeable in relatively fast charging cycles. [Overview of the Initiative]

[0009] The battery pack is used for use in electric vehicles. The battery pack includes a lateral front component and lateral members, each extending in width and interconnected by two spaced sill members extending in length. At least two longitudinal rows of prismatic battery cells extend adjacent to each other in the length direction. The cells are tiled in an array, including the lateral rows. The array has longitudinal sides. The battery pack further includes plate-shaped cooling members interposed between adjacent cells in the longitudinal rows, extending in width from a first longitudinal side to a second longitudinal side of the array. Each plate-shaped cooling member is connected to an inlet leading to a coolant distribution duct and an outlet leading to a coolant discharge duct. The distribution and discharge ducts extend parallel to the sill members. The distribution ducts are connected to the coolant supply ducts, and the discharge ducts are connected to the return ducts. Coolant supply ducts and return ducts penetrate the front components and / or lateral members. In this configuration, at least two longitudinal rows extend in the length direction. Furthermore, at least two longitudinal rows are arranged adjacent to each other. That is, at least two longitudinal rows are arranged adjacent to each other in the width direction. Within one row, the rectangular battery cells forming the row are arranged adjacent to each other in the length direction. Cells from adjacent longitudinal rows, arranged adjacent to each other, form a lateral row.

[0010] The plate-shaped cooling element extends along the lateral rows of the rectangular battery cells.

[0011] Directions such as width or lateral, and length or longitudinal, indicate the orientation of the battery pack. That is, width or lateral is understood as the width direction of the battery pack, or the lateral direction of the battery pack. Similarly, length or longitudinal is understood as the length direction of the battery pack, or the longitudinal direction of the battery pack.

[0012] If a battery pack is mounted on a vehicle, the orientation of the battery pack may correspond to the orientation of the vehicle. That is, the width or lateral direction of the battery pack corresponds to the width or lateral direction of the vehicle, and the length or longitudinal direction of the battery pack corresponds to the length or longitudinal direction of the vehicle.

[0013] This development, by supplying coolant to plate-type cooling elements in parallel, provides effective cooling, which in turn lowers the maximum temperature of the battery pack. This allows for monitoring the maximum temperature and maintaining it below a threshold, thereby suppressing the degradation of the electrolyte in the battery cells. Distributing the coolant in parallel improves the uniformity of cooling, suppressing the occurrence of localized high-temperature areas, and enabling faster charging with relatively high power input (amperes) for a longer period before power input reduction becomes necessary due to localized high-temperature areas within one or more cells.

[0014] A smaller temperature difference at the cell level extends the lifespan of the cells. The cells in the battery pack developed in this project maintain a more uniform internal temperature, resulting in less degradation (slower aging), and consequently, electrochemical reactions can proceed and progress with uniform and consistent operation.

[0015] The cooling members may be placed between pairs of adjacent rows of cells in the transverse direction. In other words, the cooling members are positioned between any two rows of transverse cells. This results in the cells and cooling members being arranged alternately when viewed in the longitudinal direction.

[0016] In this way, each cell within the battery pack is cooled along at least one side to ensure optimal cooling and avoid the occurrence of localized high-temperature areas.

[0017] Alternatively, cooling members are provided every other pair between adjacent pairs of cells in adjacent rows of transverse cells. In other words, cooling members are provided on every other interface between adjacent rows of transverse cells. There are no cooling members every other cell in adjacent rows of transverse cells. This is true when viewed in the longitudinal direction. In other words, when viewed again in the longitudinal direction, the following pattern is formed: row of transverse cells, row of transverse cells, cooling member, row of transverse cells, row of transverse cells, cooling member. This alternative provides a good compromise between structural simplicity and effective cooling.

[0018] An alternative arrangement in which cooling members are placed between each adjacent pair of cells in a horizontal row may be combined with an alternative arrangement in which cooling members are placed every other pair between adjacent pairs of cells in adjacent horizontal rows. That is, in the first section of the battery pack, cooling members are placed between each adjacent pair of cells in a horizontal row. In the second section of the battery pack, cooling members are placed every other pair between adjacent pairs of cells in adjacent horizontal rows. In this way, cooling members can be arranged within the cell pack as needed to meet specific requirements.

[0019] The front components and lateral members have a load capacity of 20 to 200 kN / m relative to the longitudinal cell. 2 A compressive force may be applied. In other words, the cell and plate-type cooling member are compressed between the front component and the lateral component.

[0020] As a result, the stacking of cells before compression and the cooling components between the front components and the lateral members realize a lightweight structural battery that can be cooled effectively and uniformly.

[0021] The injection duct may be connected to the distribution duct, or near the midpoint of the distribution duct. The midpoint of the distribution duct may correspond to the midpoint of the cell array along the longitudinal direction.

[0022] As a result, when viewed from the longitudinal direction, this leads to a symmetrical distribution of flow along the cooling material, improving the uniformity of cooling.

[0023] In the battery pack according to this disclosure, cooling members may be provided between a lateral front component and an adjacent row of lateral cells, and between a lateral component and an adjacent row of lateral cells.

[0024] By cooling both the first and last long surfaces of a row of cells in the lateral direction, each cell comes into contact with the lateral beam, and overheating of that cell is suppressed.

[0025] In the battery pack, the distance between the longitudinal side of the array and the sill member in the width direction may be between 5 cm and 25 cm. Coolant injection ducts and coolant return ducts extend between the longitudinal side and the sill member.

[0026] The coolant supply duct and coolant return duct are housed in the space between the battery cell array and the sill member, resulting in a compact structure. This reduces the height of the battery pack and creates a strong connection between the cooling channels and cells, thereby strengthening the structure of the battery pack.

[0027] The lateral members of the battery pack include a beam or foot garage and a lateral rear component interconnected with the rear part of the sill member. A first array of cells is located between the front lateral member and the beam or foot garage. A second array of cells is located between the beam or foot garage and the lateral rear component. Each array of cells is provided with a cooling member, a coolant inlet, a distribution duct, and discharge and return ducts. The inlets and return ducts of the first and second arrays of cells penetrate the lateral front component and the beam or foot garage. The first array may be considered as a subarray of the array of cells, as previously defined. Similarly, the second array may be considered as a subarray of the array of cells, as previously defined.

[0028] In this context, the footwell is understood as a part or assembly that includes a place or receiving space accessible to at least one human foot. This applies to the situation where a battery pack is mounted on a vehicle.

[0029] The cells are each housed between the front cell bay and the rear cell bay, each with its own cooling system. A lateral beam shaped like a footwell provides better ergonomics for a vehicle with a low height. The lateral beam, which functions as a longitudinal scaling member (e.g., at the center) of the battery pack, strengthens the structure of the structural battery pack.

[0030] A battery pack may be provided, where each cooling member includes two parallel plates having end caps, and the end caps have lateral tube portions. The lateral tube portions may be interconnected to form a distribution duct.

[0031] The cooling members have a thin and compact design, and the side surfaces of the battery cells are provided with a wide heat exchange surface. The plate - type cooling members can be easily manufactured by extrusion molding. The walls and cross - sections of the cooling members are balanced in terms of thickness and surface area between the need for optimal cooling and the compressive force that needs to act on the cells longitudinally when the cells expand due to aging. If the cooling members are too thin, they may break under pressure, and then the cells will expand without limit, significantly shortening the life of the cells.

[0032] The lateral tube portions of adjacent cooling members may be interconnected via elastic tube members, respectively.

[0033] Lateral tubes of the cooling members form a valve, which is preferably made of aluminum. Adjacent valves on the outer surfaces of cooling members are connected to each other by elastic hoses or tubular components that snap into place to ensure a complete connection, forming a continuous distribution channel for the cooling fluid.

[0034] The support structure may be positioned between two parallel plates of at least one cooling member. The support structure may be elastic. In this case, the support structure may be designed as a spring element or spring structure. This has the effect that the front and lateral members provide compressive force along the length of the cell, and a sufficiently large flow path is maintained between the two parallel plates, even when the cooling member is positioned between them. Furthermore, such a support structure has the effect of evenly distributing the compressive force throughout the cell and the cooling member.

[0035] The support structure may be made from metal or plastic.

[0036] The support structure may have a wavy shape. Preferably, the support structure has a wavy shape when viewed along the width direction. This is effective in that it provides a sufficiently large flow path for the coolant in the width direction. At the same time, such a cooling member is highly stable.

[0037] Such wavy shapes may be manufactured by deforming sheet materials such as sheet metal or plastic sheets. Alternatively, such wavy shapes may be manufactured using an extrusion molding process.

[0038] In one example, the support structure may be positioned between two parallel plates of each cooling member.

[0039] The distribution cooling member may be provided in the battery pack with an end having a mounting portion that extends substantially parallel to the plate member, a cover that engages liquid-tightly with the mounting portion to form a receiving chamber, and a connector stub for connecting to an injection duct. This ensures that the coolant is supplied to the cooling member in a reliable manner.

[0040] The cooling member according to this disclosure may include two parallel plate members and two end caps positioned substantially parallel to the plate members. The end caps may be liquid-tightly connected to the plate members or connected in a liquid-tight manner along their outer circumference. The cooling member may further include tubular portions extending laterally to the surface of the plate members at each side of the end caps, and may be configured to connect with adjacent tubular portions to form a distribution duct together with adjacent cooling members. Such a cooling member may be designed as a first type of cooling member.

[0041] The end cap may include a mounting portion extending substantially parallel to the plate member, a cover that engages liquid-tightly with the mounting portion to form a receiving chamber, and a connector stub for connecting to an injection duct.

[0042] Another cooling member according to the present invention includes two parallel plate members and two end caps liquid-tightly connected to the plate members, at least one of which has a mounting portion extending substantially parallel to the plate member and a cover liquid-tightly engaged with the mounting portion to form a receiving chamber. The cooling member may further include a connector stub for connection to an injection duct. Such a cooling member may be designed as a second type of cooling member.

[0043] The cooling member according to the present invention may be a cooling member for a battery pack according to the present invention.

[0044] A cooling system for a battery pack includes at least one cooling component of a first type and / or at least one cooling component of a second type. By using such a cooling system, the temperature inside the battery pack can be controlled effectively and efficiently.

[0045] In one example, the cooling system includes a plurality of first-type cooling members, each interposed between adjacent cells. Furthermore, the cooling system may include one second-type cooling member to supply coolant to the first-type cooling members.

[0046] An electric vehicle includes a battery pack according to the present invention. Such a battery pack allows for relatively fast charging because effective and efficient cooling is ensured. A method for manufacturing a battery pack for an electric vehicle includes the steps of forming an array of at least two rows of rectangular battery cells having longitudinal sides and extending adjacent to each other in the longitudinal direction, and a plate-shaped cooling member arranged in a transverse row and positioned between adjacent cells, extending in the width direction from the longitudinal upstream side to the longitudinal opposite side of the array, to compress the array, rigidly fixing the array between a transverse front component and a transverse member extending in the width direction, connecting the transverse front component and the transverse member to each other via two sill members each extending along the longitudinal side, and connecting the cooling member to a coolant supply duct and a coolant return duct through the transverse front component and / or the transverse member.

[0047] Before the sill members are connected, the cooling plates may be connected to each other via elastic duct portions.

[0048] One example relates to a method for manufacturing a battery pack according to the present invention. [Brief explanation of the drawing]

[0049] Embodiments of a battery pack having a cooling element according to this disclosure will be described in detail with reference to the accompanying drawings as non-limiting examples. [Figure 1] It is an electric vehicle equipped with a battery pack. [Figure 2] This is a perspective view of a battery pack with a cooling system. [Figure 3] Figure 2 is a top view of the battery pack. [Figure 4] Figure 2 is a detailed view of the injection duct of the cooling system. [Figure 5] Figure 2 is a detailed diagram of the distribution duct of the cooling system. [Figure 6] This is the distribution member of the cooling system shown in Figure 2. [Figure 7] This involves connecting the injection duct to the distribution member. [Figure 8] This is a magnified view of the distribution member. [Figure 9] Figure 2 is a partial cross-sectional view of the cooling system. [Figure 10] Figure 2 is a detailed diagram of the cooling components of the battery pack. Detailed description of the invention

[0050] Figure 1 shows the frame 1 of an electric vehicle, comprising a front frame structure 2, a rear frame structure 3 including a rear floor, and a structural battery pack 4 that forms the bottom structure 5 of the vehicle. The structural battery pack 4 includes longitudinal sill members 6, 7 and transverse front and rear beams 8, 9. The sill members 6, 7 are connected to the sill members 10, 11 of the frame, and the transverse beams 8, 9 are connected to the front frame structure 2 and the rear frame structure 3. The upper plate 12 of the battery pack 4 forms the bottom of the vehicle's cabin.

[0051] Figure 2 shows two arrays 13 and 14 of rectangular battery cells arranged in rows 16, 17, 18, and 19 extending in the longitudinal direction L. The battery cells in the front array 13 are compressed between the front beam 8 and the foot garage 15. The battery cells in the rear array 14 are compressed between the foot garage 15 and the rear beam 9.

[0052] Cooling plates 21, 22, and 23 for cooling the sides of the battery cells extend in the width direction W of the lateral rows 25, 26, 27, and 28 of the battery cells. At their ends, the cooling plates 21, 22, and 23 are connected to a fluid distribution duct 30 that receives coolant via an injection duct 31 indicated by arrow I. Similarly, the outlets of the cooling plates 21, 22, and 23 are connected to a coolant discharge duct 30' and a return duct 31', as shown in Figure 3. The injection duct 31, the fluid distribution duct 30, and the distribution member 32 are located between the longitudinal sill member 7 and the longitudinal side 33 of the array of cells 13. On the opposite side, the coolant discharge duct 30' and the return duct 31' are located between the sill member 6 and the longitudinal side 34 of the array 13. The heated coolant flows from the return duct 31' to an outlet 36 indicated by arrow O.

[0053] Figure 3 shows that the injection duct 31 connects to the cooling plates 21, 22, and 23 of the front array 13 of the battery cells and continues to the distribution member 40 of the rear partial distribution duct 39 via the injection duct 37 extending through the foot garage 15. The rear partial distribution duct 39 supplies coolant to the cooling member of the rear array 14 of the cells. As indicated by the arrows, the cooled coolant enters the cooling plates 21, 22, and 23 on the upstream longitudinal side 33 of the battery cell arrays 13 and 14 via the injection port I and flows to the downstream longitudinal side 34 in the width direction. The heated coolant is carried to the coolant outlet O via the discharge duct 30' and the return duct 31'.

[0054] Note that in the example in Figure 3, the injection duct 31 penetrates the lateral front component or the lateral front beam 8. The return duct 31' also penetrates the lateral front component or the lateral front beam 8. Alternatively, the injection duct 31 may penetrate the lateral rear beam 9. Furthermore, the return duct 31' may penetrate the lateral rear beam 9. These two examples may be combined so that the injection duct 31 penetrates both the lateral front beam 8 and the lateral rear beam 9. In this combination, the return duct 31' penetrates both the lateral front beam 8 or the lateral rear beam 9.

[0055] Figure 4 shows that the injection duct 31 extends from the injection port I, located in the space between the sill material 7 and the longitudinal side 33 of the cell array 13, to the distribution member 32. The distance d between the sill material 7 and the longitudinal side 33 may be between 5 cm and 25 cm.

[0056] Figure 5 shows the injection duct 31 and distribution duct 30 that connect the cooling members 21, 22, and 23 to each other.

[0057] Figure 6 is an enlarged perspective view of a central distribution member 32 having a T-shaped end 40. The end 40 seals the end face of a cooling channel formed between parallel cooling plates 41, 42. The end 40 includes a connector stub 43 for connecting an injection duct 31 and two cocks 44, 45 for connecting to cocks 47, 52 of adjacent cooling members 48, 49 for forming a distribution duct 30.

[0058] For each of the cooling members 48, 49, and 54, the cooling channel is formed between two parallel cooling plates of the cooling member. Each end face of the cooling member is provided with an end cap 50 that seals the end face of the cooling channel, and the end cap 50 is provided with two side cocks 51 and 52. The side cocks 51 and 53 of adjacent cooling members 48 and 54 are connected to each other via an elastic tubular member 55 such as a rubber hose, and snap into place when the distribution duct 30 is completed.

[0059] Figure 7 is a top view of the injection duct 31 connected to the connector stub 43 at the end 40 of the distribution member 32.

[0060] Figure 8 shows a distribution member 32, each formed from two T-shaped end flanges 57, 58, each containing a side cock 45, and a lateral end cap 59 supporting a connector stub 43. As shown in Figure 9, the end cap 59 and flanges 57, 58 define a receiving chamber 66 through which the coolant enters via the injection duct. From the receiving chamber 66, the coolant enters the distribution duct 30 via the side cock 45 and into a cooling channel defined between the cooling plates 41, 42. The cooling plates 41, 42 may be formed from aluminum T-shaped flanges and end caps 59 and may be connected to each other by brazing, clinching, or hemming.

[0061] Figure 9 shows cooling channels 60, 61, and 62 located between parallel, adjacent lateral rows 63, 64, and 65 of the cells. The coolant supplied by the injection duct 31 is distributed from the receiving chamber 66 of the distribution member 32 into the distribution duct 30 in two opposite longitudinal directions. The distribution member 32 is located midway along the distribution duct, resulting in a uniform flow of coolant passing through all the cooling members. From the distribution duct 30, the coolant enters the cooling channels, which make heat exchange contact with the sides of the battery cells 63, 64, and 65. The coolant is carried downstream of the lateral rows 63, 64, and 65 of the cells and out through an outlet similar to the layout of the inlet configuration shown in Figure 9.

[0062] Figure 10 shows details of the cooling members 21, 22, and 23.

[0063] The cooling members 21, 22, and 23 include a support structure 68 positioned between two parallel plates 41 and 42.

[0064] In the example shown in Figure 10, the support structure 68 is made of metal and is formed in a wavy or zigzag shape. When the support structure 68 is viewed in the width direction, a wavy or zigzag structure can be seen.

[0065] The inner portions of the cooling members 21, 22, and 23 that are not in contact with the support structure 68 function as coolant flow paths. In other words, the support structure 68 obstructs the flow of coolant in the width direction little to no.

[0066] The support structure 68 has a spring function when the cells and cooling members 21, 22, and 23 are compressed in the longitudinal direction. This ensures that the compressive force is evenly distributed and that the cross-sectional area of ​​the available flow path is not significantly reduced.

Claims

1. A battery pack (4) used in an electric vehicle, wherein the battery pack (4) is It is interconnected by two spaced sill members (6, 7) extending in the length direction (L), and each of them has a lateral front part (8) and lateral members (9, 15) extending in the width direction (W), At least two rectangular battery cells (63, 64, 65) are arranged in an array (13, 14) having horizontal rows (25, 26, 27, 28) and longitudinal sides (33, 34), and extending adjacently in the longitudinal direction (L), forming longitudinal rows (16, 17, 18, 19), Interposed between adjacent cells (63, 64, 65) in the longitudinal rows (16, 17, 18, 19), cooling plates (21, 22, 23) extending in the width direction (W) from the first longitudinal side (33) to the second longitudinal side (34) of the array (13, 14), The sill members (6, 7) include a coolant distribution duct (30) and a coolant discharge duct (30') extending parallel to each other, Each of the cooling plates (21, 22, 23) is connected to an inlet leading to the coolant distribution duct (30) and an outlet leading to the coolant discharge duct (30'), The coolant distribution duct (30) is connected to the coolant supply duct (31), and the coolant discharge duct (30') is connected to the coolant return duct (31'). The coolant supply duct (31) and the coolant return duct (31') pass through the front component (8) and / or the lateral members (9, 15), The distribution cooling member (32) is provided with an end having mounting portions (57, 58) that extend substantially parallel to the cooling plates (41, 42), a cover that is liquid-tightly engaged with the mounting portions (57, 58) to form a receiving chamber (66), and a connector stub (43) supported by the cover for connecting the coolant distribution duct (30) to the coolant supply duct (31). Battery pack (4).

2. The battery pack (4) according to claim 1, The cooling plates (21, 22, 23) are provided between each adjacent pair of cells in the row of the horizontal cells (25, 26, 27, 28). Battery pack (4).

3. The battery pack (4) according to claim 1, The cooling plates (21, 22, 23) are provided every other pair between adjacent pairs of adjacent horizontal cells (25, 26, 27, 28) in a row. Battery pack (4).

4. A battery pack (4) according to any one of claims 1 to 3, The front component (8) and the lateral member (15) have a load of 20 to 200 kN / m relative to the cell in the longitudinal direction. ２ Apply the compressive force. Battery pack (4).

5. A battery pack (4) according to any one of claims 1 to 3, The coolant supply duct (31) is connected to the midpoint or vicinity of the coolant distribution duct (30). Battery pack (4).

6. A battery pack (4) according to any one of claims 1 to 3, The cooling plates (21', 23') are provided between the lateral front component (8) and the adjacent row of lateral cells (25'), and between the lateral member (15) and the adjacent row of lateral cells (28'). Battery pack (4).

7. A battery pack (4) according to any one of claims 1 to 3, The distance (d) between the longitudinal sides (33, 34) of the array (13, 14) and the sill members (6, 7) in the width direction (W) is between 5 cm and 25 cm. The coolant supply duct (31) and the coolant return duct (31') extend between the longitudinal sides (33, 34) of the array and the sill members (6, 7). Battery pack (4).

8. A battery pack (4) according to any one of claims 1 to 3, The lateral member (15) includes a beam or foot garage and the lateral rear part (9) that connects the rear parts of the sill members (6, 7) to each other. The first array of cells (13) is located between the lateral front component (8) and the beam or the foot garage. The second array of cells (14) is located between the beam or the foot garage and the lateral rear component (9), Each of the arrays (13, 14) of the cell is provided with the cooling plates (21, 22, 23), the coolant inlet and distribution ducts (30, 31), and the coolant discharge duct and the coolant return ducts (30', 31'). The coolant supply ducts and coolant return ducts (31, 31') of the first array (13) and second array (14) of the cell penetrate the lateral front component (8) and the beam or the foot garage. Battery pack (4).

9. A battery pack (4) according to any one of claims 1 to 3, Each of the cooling plates (21, 22, 23) includes two parallel cooling plates (41, 42) having end caps (40, 50) with two lateral tubular portions (44, 45; 51, 52), The tube portions (44, 45, 51, 52) are interconnected to form the coolant distribution duct (30). Battery pack (4).

10. The battery pack (4) according to claim 9, The lateral tubular portions (51, 53) of adjacent cooling plates (48, 54) are each connected to one another via an elastic tubular member (55). Battery pack (4).

11. The battery pack (4) according to claim 9, The support structure (68) is positioned between the two parallel cooling plates (41, 42) of at least one of the cooling plates (21, 22, 23). Battery pack (4).

12. Cooling members (48, 49, 54) for the battery pack (4), Two parallel cooling plates (41, 42) and The cooling plates (41, 42) are arranged substantially parallel to each other, Two end caps (50) are connected in a liquid-tight manner to the cooling plates (41, 42) and along the outer circumference in a liquid-tight manner, The cooling plates (41, 42) extend laterally to the respective sides of the end cap (50), In order to form a coolant distribution duct (30) together with adjacent cooling members, tube portions (51, 52) are configured to be connected to adjacent tube portions (44, 53), Two end caps (40) are liquid-tightly connected to the cooling plate, A connector stub (43) for connecting to the coolant supply duct (31), Includes, At least one of the end caps (40) has mounting portions (57, 58) that extend substantially parallel to the cooling plates (41, 42), and a cover that is liquid-tightly engaged with the mounting portions (57, 58) to form a receiving chamber (66), The connector stub (43) is supported by the cover and connects the coolant distribution duct (30) to the coolant supply duct (31). Cooling components (48, 49, 54).

13. Cooling members (48, 49, 54) for the battery pack (4), Two parallel cooling plates (41, 42) and Two end caps (40) are liquid-tightly connected to the cooling plate, A connector stub (43) for connecting to the coolant supply duct (31), Equipped with, At least one end cap (40) has mounting portions (57, 58) that extend substantially parallel to the cooling plates (41, 42), and a cover that is liquid-tightly engaged with the mounting portions (57, 58) to form a receiving chamber (66), The connector stub (43) is supported by the cover and connects the coolant distribution duct (30) to the coolant supply duct (31). Cooling components (48, 49, 54).

14. A cooling system for a battery pack (4), A cooling member comprising at least one cooling member according to claim 12 and / or at least one cooling member according to claim 13, Cooling system.

15. Includes a battery pack (4) according to any one of claims 1 to 3, Electric vehicles.

16. A method for manufacturing a battery pack (4) for an electric vehicle, An array (13, 14) of at least two rows (16, 17, 18, 19) of rectangular battery cells (63, 64, 65) having longitudinal sides (33, 34) and extending adjacent to each other in the longitudinal direction (L), The steps include forming cooling plates (21, 22, 23) arranged in horizontal rows (25, 26, 27, 28) and positioned between adjacent cells, extending in the width direction (W) from the longitudinal upstream edge (33) to the longitudinal opposite edge (34) of the array (13, 14), In order to compress the array (13, 14), the steps include: firmly fixing the array (13, 14) between a lateral front component (8) extending in the width direction (W) and lateral members (9, 15); The steps include connecting the aforementioned lateral front part (8) and the aforementioned lateral members (9, 15) to each other via two sill members (6, 7) that extend along their respective longitudinal sides (33, 34), The cooling plates (21, 22, 23) are connected to the coolant supply duct (31) and the coolant return duct (31') by passing through the lateral front component (8) and / or the lateral members (9, 15), wherein the cooling plates (21, 22, 23) are The two parallel cooling plates (41, 42) and Two end caps (40) are liquid-tightly connected to the cooling plate, A connector stub (43) for connecting to the coolant supply duct (31), Equipped with, At least one end cap (40) has mounting portions (57, 58) that extend substantially parallel to the cooling plates (41, 42), and a cover that is liquid-tightly engaged with the mounting portions (57, 58) to form a receiving chamber (66), The connector stub (43) is supported by the cover and connects the coolant distribution duct (30) to the coolant supply duct (31). Manufacturing method.

17. A manufacturing method according to claim 16, Before the sill members (6, 7) are connected, the cooling plates (21, 22, 23) are connected to each other via the elastic duct portion (55). Manufacturing method.

Images