Module for an electric vehicle

Abstract

The invention relates to an electrical module (1) comprising an internal cavity (2) intended to be filled with a moving heat-transfer fluid (3), the module (1) comprising a plurality of electrical cells (4) arranged in the internal cavity (2), the module (1) comprising at least one deflecting device (18, 26, 33, 39) capable of directing the heat-transfer fluid (3) within the internal cavity (2) so that the heat-transfer fluid (3) moves around the cells (4).

Description

Module for electric vehicle Technical field of the invention

[0001] The invention relates to the field of rechargeable electric batteries for electric vehicles. In particular, the invention relates to modules comprising a plurality of electrical cells. More precisely, the invention relates to a module capable of being filled with a dielectric heat transfer fluid. The invention also relates to a thermal management system for this module. Technical background

[0002] The electric battery intended to equip electric vehicles comprises several electrical modules, themselves comprising numerous electrical cells.

[0003] For optimal operation, the cells are maintained within a predetermined temperature range.

[0004] Thus, the thermal management of cells can consist of cooling the cells or, on the contrary, heating them.

[0005] Thermal management of cells in a module is therefore a major issue.

[0006] Among the existing thermal management techniques, one involves immersing the cells in a temperature-controlled liquid. This puts the cells in the module in direct contact with the liquid.

[0007] This thermal management system using immersion is particularly effective. Indeed, it allows for better heat transfer through direct contact and enables thermal control in areas that might otherwise be difficult to access.

[0008] Thermal management by immersion requires a sealed module in which the electrical cells are arranged. A fluid is circulated within the module.

[0009] Depending on the type of cells (cylindrical, prismatic, bagged, wound electrode or stacked electrode), thermal management can be adapted.

[0010] Stacked electrode cells, also known as "stacked electrode" cells, have complex thermal management. These cells comprise a plurality of electrodes stacked one on top of the other, each electrode being distinct from the others.

[0011] Optimal management requires the ability to thermally act on each of the electrodes that make up the cell.

[0012] Acting thermally on each of the electrodes is particularly complex to implement with regard to stacked electrode cells.

[0013] Another drawback of conventional immersion thermal management systems lies in the strong temperature gradients they generate. Due to the distribution of heat flux around the cells, the periphery of the electrodes exhibits a significantly higher temperature than the center of the electrode. This temperature difference reduces the efficiency of the electrodes and thus the performance of the cell.

[0014] Therefore, there is a need to improve the architecture of electrical modules.

[0015] To this end, it is proposed firstly an electrical module comprising an internal cavity intended to be filled with a moving heat transfer fluid or intended to be filled at least in part by a moving heat transfer fluid (3), said module comprising a plurality of electrical cells arranged in the internal cavity, said module comprising at least one deflecting device capable of directing the heat transfer fluid in the internal cavity so that said heat transfer fluid moves around said cells.

[0016] Various additional features may be provided alone or in combination: - the module includes a fluidic channel located around the cells, the heat transfer fluid being able to circulate in said fluidic channel, the module in which at least one diverter device is arranged in the fluidic channel; - the module includes: - a lower wall, - an upper wall opposite the lower wall, - a first lateral wall connecting the lower wall to the upper wall, - a second lateral wall opposite the first lateral wall and connecting the lower wall to the upper wall, - a proximal wall integral with the lower wall, the upper wall, the first lateral wall and the second lateral wall, - a distal wall opposite the proximal wall and integral with the lower wall, the upper wall, the first lateral wall and the second lateral wall, the lower wall, upper wall, first lateral wall,second lateral wall, proximal wall and distal wall, together defining the internal cavity; - the cells comprise a stack of electrodes distinct from one another and separated by a porous separating film, said electrodes being stacked along a stacking axis, module in which the electrical cells are arranged one on top of the other and in direct contact with each other so as to form at least one column which extends along the stacking axis of the electrodes of said cells, module in which the fluidic channel is located on one side between the proximal, distal, and lateral walls and on the other side at least one column of cells; - the first column comprises: - a first face opposite the proximal wall, - a second face opposite the first face and opposite the distal wall, - a third face opposite the first lateral wall, and - a fourth face opposite the third face,module in which it includes a first deflector device extending along the stacking axis from the lower wall to the upper wall on one side and from the proximal wall to the first column substantially in line with the fourth face, module in which it includes an inlet orifice substantially adjacent to the first deflector device so that the heat transfer fluid is directed along the first face, then the third face, then the second face, then the fourth face of said first column; - includes at least one additional odd-numbered cell column arranged between the first column and the second lateral wall, the at least one additional odd-numbered column comprising: - a fifth face opposite the proximal wall, - a sixth face opposite the fifth face and opposite the distal wall,- a seventh face substantially perpendicular to the fifth and sixth faces and located on the side of the first lateral wall, - an eighth face opposite the seventh face and located on the side of the second lateral wall, a module in which this includes a second deflector device extending along the stacking axis from the lower wall to the upper wall on one side and - from the distal wall to the additional odd-numbered column substantially in line with the seventh face, so that the heat transfer fluid is directed at least partly along the seventh face; - the second deflector device includes fluid passages intended to allow the heat transfer fluid to be directed partly along the sixth face; - includes at least one additional even-numbered cell column arranged between the first column and the second lateral wall,at least one additional even column comprising: - a ninth face opposite the proximal wall, - a tenth face opposite the ninth face and opposite the distal wall, - an eleventh face substantially perpendicular to the ninth and tenth faces and located on the side of the first lateral wall, - a twelfth face opposite the eleventh face and located on the side of the second lateral wall, module in which, this includes a third deviating device which extends along the stacking axis from the lower wall to the upper wall on one hand and - from the proximal wall to the additional even column substantially in line with the eleventh face,so that the heat transfer fluid is directed at least partially along the eleventh face; - the third deflecting device includes fluid passages designed to allow the heat transfer fluid to be directed partially along the ninth face; - includes an end cell column immediately adjacent to the second lateral wall; the end column includes: - a thirteenth face opposite the proximal wall, - a fourteenth face opposite the thirteenth face and opposite the distal wall, - a fifteenth face substantially perpendicular to the thirteenth and fourteenth faces, - a sixteenth face opposite the fifteenth face and opposite the second lateral wall, a module in which the total number of cell columns is even,said module includes a fourth deflector device extending along the stacking axis from the lower wall to the upper wall on one side and from the distal wall to the end column substantially in line with the fourteenth face, so that the heat transfer fluid is directed along the fourteenth face; or module in which the total number of cell columns is odd greater than 1, said module includes a fourth deflector device extending along the stacking axis from the lower wall to the upper wall on one side and from the proximal wall to the end column substantially in line with the fourteenth face.so that the heat transfer fluid is directed along the fourteenth face; - the fourth diverter device is continuous; - a length of heat transfer fluid flow measured between the inlet and outlet ports is less than or equal to five meters; - the cells comprise electrodes and an electrolyte packaged in a hermetically sealed flexible bag; - the diverter devices are passive devices.

[0017] Secondly, a thermal management system is proposed comprising the module presented above, said system comprising: - a closed fluidic circuit, - a heat transfer fluid which is a dielectric liquid suitable for circulating in the fluidic circuit, - means for measuring the temperature of the dielectric liquid, - a pump suitable and intended to move the dielectric liquid in the fluidic circuit, - a computer management device suitable for receiving data from the means for measuring the temperature and suitable for controlling the pump. Brief description of the figures

[0018] Other features and advantages of the invention will become apparent upon reading the detailed description that follows, for an understanding of which reference should be made to the accompanying drawings in which:

[0019] laest a schematic top-view representation of a module according to the state of the art.

[0020] laest a schematic top view representation of a module according to the invention.

[0021] laest a schematic top view representation of a module according to the invention.

[0022] laest a schematic top view representation of a module according to the invention.

[0023] laest a schematic top view representation of a module according to the invention.

[0024] laest a schematic representation of a thermal management system comprising a module according to the invention. Detailed description of the invention

[0025] The drawings show an electrical module 1. The electrical module 1 includes an internal cavity 2. The internal cavity 2 is intended to be filled with a heat transfer fluid 3.

[0026] Alternatively, the internal cavity 2 is intended to be partially filled with a heat transfer fluid.

[0027] The heat transfer fluid 3 is in motion, as indicated by the visible arrows. In other words, the heat transfer fluid 3 is not static inside the internal cavity 2.

[0028] Module 1 comprises 4 electrical cells arranged in the internal cavity 2.

[0029] Module 1 includes at least one diverter device 18, 26, 33, 39 suitable for diverting the heat transfer fluid 3 into the internal cavity 2. The diverter device 18, 26, 33, 39 is suitable for orienting the heat transfer fluid 3. This orientation is such that the heat transfer fluid 3 moves around the cells 4.

[0030] First, we define a first X axis extending along a first extension direction of module 1. Second, we define a second Y axis transverse perpendicular to the X axis. Finally, we define a Z axis of transverse stacking perpendicular to the X and Y axes.

[0031] Thus, thermal management is optimal. As it moves around the cells 4, the temperature of the heat transfer fluid 3 gradually increases. With reference to the diagram, without a deflector device, the temperature at opposite points A1 and B1 is virtually identical. The temperature at a point C1 located at the center of a cell 4 is much higher than that of points A1 and B1 located on opposite sides of the cell 5 along the X-axis, because the heat transfer fluid 3 has not had time to heat up since it is moving around the cell 4. In the diagram, module 1 includes a deflector device 18, 26, 33, 39. The temperature at a point B2 on slice 5 is then higher than the temperature at a point A2 on slice 5 and opposite to point B2 along the X axis because the heat transfer fluid has gradually increased in temperature as it moves around cell 4. This allows for less abrupt thermal management.Thus, cell 4 becomes more efficient.

[0032] Advantageously, module 1 includes a fluidic channel 6. The fluidic channel 6 is located around the cells 4, and the heat transfer fluid 3 circulates within said fluidic channel 6. The diverter device 18, 26, 33, 39 is arranged within the fluidic channel 6.

[0033] Thus it becomes possible to direct the heat transfer fluid in a given direction.

[0034] Advantageously, module 1 comprises: - a lower wall 7, - an upper wall not shown in the drawings, - a first lateral wall 8 connecting the lower wall to the upper wall, - a second lateral wall 9 opposite the first lateral wall 8 and connecting the lower wall 7 to the upper wall, - a proximal wall 10 attached to the lower wall 7, the upper wall, the first lateral wall 8 and the second lateral wall 9, - a distal wall 11 opposite the proximal wall 10 and attached to the lower wall 7, the upper wall, the first lateral wall 8 and the second lateral wall 9.

[0035] The walls 7, 8, 9, 10, 11 and the upper wall together define the internal cavity 2.

[0036] Advantageously, the cells 4 comprise a stack of electrodes distinct from one another and separated by a porous separator film. The electrodes are stacked along the Z-axis of stacking. The electrical cells 4 are arranged one on top of the other and in direct contact with each other so as to form at least one column 12, 21, 28, 34 extending along the Z-axis of stacking. The fluidic channel 6 is located on one side between the lateral, proximal, and distal walls 8, 9, 10, 11, and on the other side of the column 12, 21, 28, 34 of cells 4.

[0037] This architecture allows for precise thermal management of each electrode in each cell. This arrangement enables the heat transfer fluid to be placed very close to each electrode in each cell of module 1. The heat transfer fluid thus coats the periphery of each electrode. This architecture allows for precise thermal management of each electrode. Such precise thermal management significantly increases the performance of module 1, and therefore of the battery, by enabling operation under optimal thermal conditions through precise temperature control of each electrode.

[0038] The electrodes and the electrolyte are conveniently packaged in a flexible, airtight bag.

[0039] Such an architecture allows for optimal thermal management.

[0040] According to a first embodiment shown on the diagram, the module includes a first column of 12 cells, 4 of which are also present.

[0041] The first column 12 comprises: - a first face 13 opposite the proximal wall 10, - a second face 14 opposite the first face 13 and opposite the distal wall 11, - a third face 15 opposite the first lateral wall 8, and - a fourth face 16 opposite the third face 15.

[0042] The module includes a first deviator device 18. The first deviator device 18 extends along the Z-axis from the lower wall 7 to the upper wall. The first deviator device 18 extends along the Y-axis from the proximal wall 10 to the first column 12. The first deviator device 18 extends substantially in line with the fourth face 16.

[0043] Module 1 includes a heat transfer fluid inlet 3. The inlet 19 is adjacent to the first diverter device. The inlet 19 is positioned opposite the first face 13.

[0044] The first diverter device 18 is in the form of a continuous wall. By "continuous", it is understood that the first diverter device 18 does not include any openings and thus does not allow the heat transfer fluid 3 to pass through it.

[0045] Thus the heat transfer fluid 3 is directed along the first face 13 then the third face 15 then the second face 14 and finally along the fourth face 16. The temperature of the heat transfer fluid 3 rises gradually in contact with the first column 12. The thermal management is thus less abrupt, which improves the performance of the electrical cells 4.

[0046] Advantageously, and with reference to Figures 4 and 5, Module 1 can include at least one additional odd-numbered column 21 of cells. By "odd-numbered," it is understood that the additional column is the first, third, fifth column, and so on, moving along the X-axis and excluding the first column 12. The at least one additional odd-numbered column 21 is arranged between the first column 12 and the second lateral wall 9. Conversely, the at least one additional odd-numbered column 21 is not immediately adjacent to the second lateral wall 9.

[0047] A column of cells immediately adjacent to the second lateral wall 9, whether it is located next to the first column 12 or an additional even or odd column 21, 28, is called an end column.

[0048] The at least one additional odd column 21 comprises: - a fifth face 22 opposite the proximal wall 10, - a sixth face 23 opposite the fifth face 22 and opposite the distal wall 11, - a seventh face 25 substantially perpendicular to the fifth face 22 and the sixth face 23 and located on the side of the first lateral wall 8, - an eighth face 46 opposite the seventh face 25 and located on the side of the second lateral wall 9.

[0049] Module 1 advantageously includes a second deflector device 26. The second deflector device 26 extends along the stacking Z-axis from the lower wall 7 to the upper wall.

[0050] The second deviator device 26 extends from the distal wall 11 to the additional odd column 21 substantially in the continuation of the seventh face 25 and along the Y axis.

[0051] Thus, at least part of the heat transfer fluid 3 is directed along the seventh face 25 and continues its path around the cells 4. The path of the heat transfer fluid 3 closely resembles that of a coil or a slalom. The temperature of the heat transfer fluid 3 thus rises gradually upon contact with the cells 4. Thermal management is therefore less abrupt, which improves the performance of the electrical cells 4.

[0052] Advantageously the second diverter device 26 includes fluidic passages 27.

[0053] Thus the heat transfer fluid 3 is partly directed along the sixth face 23.

[0054] Advantageously, module 1 can include at least one additional 28-pair column of cells. By "pair," it is understood that the additional 28-pair column is the second, fourth, sixth column, and so on, moving along the X-axis and excluding the first column. The at least one additional 28-pair column is arranged between the additional 21-odd column and the second lateral wall. Conversely, the at least one additional 28-pair column is not immediately adjacent to the second lateral wall. As previously mentioned, a column immediately adjacent to the second lateral wall is an end column.

[0055] The at least one additional column 28 pair comprises:- a ninth face 29 opposite the proximal wall 10,- a tenth face 30 opposite the ninth face 29 and opposite the distal wall 11,- an eleventh face 31 substantially perpendicular to the ninth face 29 and the tenth face 30 and located on the side of the first lateral wall 8,- a twelfth face 32 opposite the eleventh face 31 and located on the side of the second lateral wall 9.

[0056] Module 1 advantageously includes a third deflector device 33. The third deflector device 33 extends along the stacking Z-axis from the lower wall 7 to the upper wall.

[0057] The third deviator device 33 extends from the proximal wall 10 to the additional paired column 28 substantially in the continuation of the eleventh face 31 and along the Y axis.

[0058] Thus, at least part of the heat transfer fluid 3 is directed along the eleventh face 31 and continues its path around the cells 4. The path of the heat transfer fluid 3 closely resembles that of a coil or a slalom. The temperature of the heat transfer fluid 3 thus rises gradually upon contact with the cells. Thermal management is therefore less abrupt, which improves the performance of the electrical cells.

[0059] Advantageously the third diverter device 33 includes fluidic passages 27.

[0060] Thus the heat transfer fluid 3 is partly directed along the ninth face 29.

[0061] Advantageously, as previously mentioned, module 1 may include an end column 34. The end column 34 is immediately adjacent to the second lateral wall 9. The first column 12 is not an end column. The end column 34 comprises: - a thirteenth face 35 opposite the proximal wall 10, - a fourteenth face 36 opposite the thirteenth face 35 and opposite the distal wall 11, - a fifteenth face 37 substantially perpendicular to the thirteenth face 35 and the fourteenth face 36, - a sixteenth face 38 opposite the fifteenth face 37 and opposite the second lateral wall 9.

[0062] In what follows, a distinction is made depending on whether the module comprises an even or odd total number of columns of cells.

[0063] With reference to Figures 3 and 5, when module 1 comprises an even total number of cell columns, said module 1 includes a fourth deviator device 39. The fourth deviator device 39 extends along the stacking Z-axis from the lower wall 7 to the upper wall. The fourth deviator device 39 extends from the distal wall 11 to the end column 34 substantially in line with the fourteenth face 36 and along the Y-axis.

[0064] Thus, the heat transfer fluid 3 is directed along the fourteenth face 36 so that it can continue its path around the cells. The path of the heat transfer fluid 3 closely resembles that of a coil or a slalom. The temperature of the heat transfer fluid 3 thus rises gradually upon contact with the cells. Thermal management is therefore less abrupt, which improves the performance of the electrical cells.

[0065] With reference to Figure 5, when module 1 comprises an odd total number of cell columns, this total number being greater than 1, said module includes a fourth deviator device 39. The fourth deviator device 39 extends along the stacking Z-axis from the lower wall 7 to the upper wall. The fourth deviator device 39 extends from the proximal wall 10 to the end column 34 substantially in line with the fourteenth face 36 and along the Y-axis.

[0066] Thus, the heat transfer fluid 3 is directed along the fourteenth face 36 so that it can continue its path around the cells. The path of the heat transfer fluid 3 closely resembles that of a coil or a slalom. The temperature of the heat transfer fluid 3 thus rises gradually. Thermal management is therefore less abrupt, which improves the performance of the electrical cells.

[0067] The fourth deflector device 39 is in the form of a continuous wall.

[0068] This allows the entire heat transfer fluid 3 to be directed towards an outlet orifice 40.

[0069] Advantageously, a length of the heat transfer fluid flow measured between the inlet and outlet ports is less than or equal to five meters.

[0070] The length of the flow is determined by measuring the path taken by the heat transfer fluid.

[0071] This length allows for efficient and functional thermal management within the module. In particular, it ensures a sufficient heat transfer coefficient for cooling the module.

[0072] Advantageously, the deflecting devices (18, 26, 33, 39) are passive.

[0073] By "passive," it is understood that diverting devices do not require an external power source to operate. These devices are capable of redirecting fluid flow simply through their geometry or positioning, without relying on any external mechanism.

[0074] The use of passive deflection devices helps prevent device failures, thus increasing their reliability. Furthermore, such devices allow for a simplified module design due to the absence of complex mechanical parts, also reducing manufacturing and maintenance costs.

[0075] The invention advantageously relates to a thermal management system 41 comprising the module 1 described above.

[0076] The thermal management system includes a closed fluidic circuit 44. The fluidic circuit is in fluidic connection with the inlet port 19 and with the outlet port 40.

[0077] The thermal management system 41 includes a dielectric fluid circulating in the fluidic circuit. The dielectric fluid is a heat transfer fluid.

[0078] The thermal management system 41 includes means 42 for measuring the temperature of the dielectric liquid. These measuring means are, for example, temperature sensors.

[0079] The thermal management system 41 includes a suitable pump 43 intended to move the dielectric liquid in the fluidic circuit 44.

[0080] The thermal management system 41 includes a computer control unit 45 capable of receiving temperature data from the temperature measurement means 42. The computer control unit 45 is capable of controlling the pump 43 in order to modify the flow rate of the dielectric fluid in the fluidic circuit according to the temperature data.

[0081] Such a thermal management system enables optimal temperature regulation, allowing the electrical cells to operate at peak efficiency and resulting in improved overall performance. Specifically, this thermal management system ensures good temperature uniformity between cells and reduces their premature aging.

Claims

electrical module (1) comprising an internal cavity (2) intended to be filled with a moving heat transfer fluid (3) or intended to be filled at least in part by a moving heat transfer fluid (3), said module (1) comprising a plurality of electrical cells (4) arranged in the internal cavity (2), said module (1) comprising at least one deflecting device (18, 26, 33, 39) capable of directing the heat transfer fluid (3) in the internal cavity (2) so that said heat transfer fluid (3) moves around said cells (4). Module (1) according to claim 1 wherein, it comprises a fluidic channel (6) situated around the cells (4), the heat transfer fluid (3) being able to circulate in said fluidic channel (6), module (1) wherein at least one diverting device (18, 26, 33, 39) is arranged in the fluidic channel. Electrical module (1) according to any one of claims 1 or 2, wherein it comprises: - a lower wall (7), - an upper wall opposite the lower wall (7), - a first lateral wall (8) connecting the lower wall (7) to the upper wall, - a second lateral wall (9) opposite the first lateral wall (8) and connecting the lower wall (7) to the upper wall, - a proximal wall (10) integral with the lower wall (7), the upper wall, the first lateral wall (8) and the second lateral wall (9), - a distal wall (11) opposite the proximal wall (10) and integral with the lower wall (7), the upper wall, the first lateral wall (8) and the second lateral wall (9), the lower wall (7), upper wall, first lateral wall (8), second lateral wall (9), proximal wall (10) and distal wall (11), together defining the internal cavity (8). Module (1) according to any one of the preceding claims, wherein the cells (4) comprise a stack of electrodes distinct from one another and separated by a porous separator film, said electrodes being stacked along a stacking axis (Z), module (1) wherein the electrical cells (4) are arranged one on top of the other and in direct contact with each other so as to form at least one column (12, 21, 28, 34) which extends along the stacking axis (Y) of the electrodes of said cells (4), module (1) wherein the fluidic channel (6) is located on the one hand between the proximal, distal, lateral walls and on the other hand at least one column (12, 21, 28, 34) of cells (4). Module (1) according to claim 4, wherein the first column comprises: - a first face (13) opposite the proximal wall (10), - a second face (14) opposite the first face (13) and opposite the distal wall (11), - a third face (15) opposite the first lateral wall (8), and - a fourth face (16) opposite the third face (15), module (1) wherein this comprises a first deviator device (18) which extends along the stacking axis (Z) from the lower wall (7) to the upper wall on the one hand and from the proximal wall (10) to the first column (12) substantially in line with the fourth face (16),module in which it includes an inlet orifice (19) substantially adjacent to the first diverter device (18) so that the heat transfer fluid (3) is directed along the first face (13) then the third face (15) then the second face (14) then the fourth face (16) of said first column (12). Module (1) according to claim 5, wherein it comprises at least one additional odd-numbered column (21) of cells arranged between the first column (12) and the second lateral wall (9), the at least one additional odd-numbered column (21) comprising: - a fifth face (22) opposite the proximal wall (10), - a sixth face (23) opposite the fifth face (22) and opposite the distal wall (11), - a seventh face (25) substantially perpendicular to the fifth face (22) and the sixth face (23) and located on the side of the first lateral wall (8), - an eighth face (46) opposite the seventh face (25) and located on the side of the second lateral wall (9), module (1) wherein,This includes a second deflecting device (26) which extends along the stacking axis (Z) from the lower wall (7) to the upper wall on the one hand and from the distal wall (11) to the additional odd-numbered column (21) substantially in line with the seventh face (25), so that the heat transfer fluid (3) is directed at least partly along the seventh face (25). Module according to claim 6 in which the second diverting device (26) includes fluidic passages (27) intended to allow the heat transfer fluid (3) to be partly directed along the sixth face (23). Module (1) according to any one of claims 6 or 7, wherein it comprises at least one additional paired cell column (28) arranged between the first column (12) and the second lateral wall (9), the at least one additional paired column (28) comprising: - a ninth face (29) opposite the proximal wall (10), - a tenth face (30) opposite the ninth face (29) and opposite the distal wall (11), - an eleventh face (31) substantially perpendicular to the ninth face (29) and the tenth face (30) and located on the side of the first lateral wall (8), - a twelfth face (32) opposite the eleventh face (31) and located on the side of the second lateral wall (9), module (1) wherein,This includes a third deflecting device (33) which extends along the stacking axis (Z) from the lower wall (7) to the upper wall on the one hand and from the proximal wall (10) to the additional even column (28) substantially in line with the eleventh face (31), so that the heat transfer fluid (3) is directed at least partly along the eleventh face (31). Module (1) according to claim 8 in which the third diverting device (33) includes fluidic passages (27) intended to allow the heat transfer fluid (3) to be partly directed along the ninth face (29). Module (1) according to any one of claims 5 to 9, wherein it comprises an end column (34) of cells immediately adjacent to the second lateral wall (9). The end column (34) comprises: - a thirteenth face (35) opposite the proximal wall (10), - a fourteenth face (36) opposite the thirteenth face (35) and opposite the distal wall (11), - a fifteenth face (37) substantially perpendicular to the thirteenth face (35) and the fourteenth face (36), - a sixteenth face (38) opposite the fifteenth face (37) and opposite the second lateral wall (9). Module (1) wherein the total number of cell columns is even, said module (1) comprises a fourth deflecting device (39) extending along the stacking axis (Z) from the lower wall (7) to the upper wall of a part and from the distal wall (11) to the end column (34) substantially in line with the fourteenth face (36),so that the heat transfer fluid (3) is directed along the fourteenth face (36) or module (1) in which the total number of cell columns is odd greater than 1, said module (1) comprises a fourth deflector device (39) extending along the stacking axis (Z) from the lower wall (7) to the upper wall on one side and from the proximal wall (10) to the end column (34) substantially in line with the fourteenth face (36), so that the heat transfer fluid (3) is directed along the fourteenth face (36). Module (1) according to claim 10 in which, the fourth deflector device (39) is continuous. Module (1) according to any one of claims 5 to 11 in which, a length of the flow of heat transfer fluid (3) measured between the inlet orifice (19) and the outlet orifice (40) is less than or equal to five meters. Module (1) according to any one of the preceding claims wherein the cells (4) comprise electrodes and an electrolyte which are packaged in a hermetically sealed flexible bag. Module (1) according to any one of the preceding claims wherein, the deflecting devices (18, 26, 33, 39) are passive devices. Thermal management system (41) comprising module (1) according to any one of the preceding claims, said system (41) comprising: - a closed fluidic circuit (44), - a heat transfer fluid (3) which is a dielectric liquid suitable for circulating in the fluidic circuit (44), - means (42) for measuring the temperature of the dielectric liquid, - a pump (43) suitable and intended to move the dielectric liquid in the fluidic circuit (44), - a computer management device (45) suitable for receiving data from the temperature measurement means (42) and suitable for controlling the pump (43).

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