Battery cell module and assembling method thereof

Abstract

The invention belongs to the technical field of batteries, and discloses a battery cell module which comprises an assembly carrier, a component I, a component II and a middle partition plate, the first assembly and the second assembly are both provided with a plurality of battery cells side by side, and the first assembly and the second assembly are arranged in an assembly carrier; the middle partition plate is arranged between the first assembly and the second assembly, is of a hollow structure and is provided with a water inlet and a water outlet; the hollow space of the middle partition plate is gradually reduced from the middle part to the end part, so that the adjacent battery cells in the same assembly are staggered, and a preset angle is formed between the staggered direction and the side-by-side direction of the plurality of battery cells. According to the invention, sufficient heat exchange can be realized in the area where each battery cell is located, so that the heat dissipation effect is improved. The invention further discloses an assembling method of the battery cell module.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of batteries, and particularly relates to a battery cell module and an assembling method thereof. BACKGROUND

[0002] At present, a battery cell module integrates two smaller modules into a large module to optimize the assembly space, and can more accurately adapt to the internal space of a battery pack, that is, the battery cell module can significantly reduce the gap between each small module, thereby improving the space utilization of the battery pack by reducing the gap, and the redundant space originally dispersed among multiple small modules is fully utilized.

[0003] However, such a battery cell module still has some defects, for example, due to the high density of battery cells, heat is easily concentrated and accumulated, especially in the middle area of the integrated structure, which lacks heat dissipation measures, so that the heat in this area cannot be discharged in time, which will directly affect the cycle life and charge-discharge performance of the battery cells in the long run. SUMMARY

[0004] In order to solve the above technical problems, the present application discloses a battery cell module which can realize sufficient heat exchange in the area where each battery cell is located, thereby improving the heat dissipation effect. The present application also discloses an assembling method of the battery cell module.

[0005] The specific technical scheme of the present application is as follows: A battery cell module, comprising: an assembling carrier; a first assembly and a second assembly, each of the first assembly and the second assembly being arranged with a plurality of battery cells side by side, and the first assembly and the second assembly being arranged in the assembling carrier; and an intermediate partition plate arranged between the first assembly and the second assembly, the intermediate partition plate being a hollow structure, and the intermediate partition plate having a water inlet and a water outlet; wherein the hollow space of the intermediate partition plate gradually decreases from the middle part to the end part, so that the adjacent battery cells in the same assembly are staggered, and the staggered direction and the side-by-side direction of the plurality of battery cells form a preset angle.

[0006] The battery cell module in the present application is a double-pinned structure, that is, two smaller assemblies (the first assembly and the second assembly) are integrated into a larger assembly (the battery cell module). In actual use, the heating problem of the first assembly and the second assembly can be effectively solved by introducing cooling medium into the intermediate partition plate. Since the hollow space of the intermediate partition plate gradually decreases from the middle part to the end part, the cooling medium flow rate of the middle part of the intermediate partition plate is greater than that of the two ends of the intermediate partition plate. In other words, based on this structure, more cooling medium can be covered on the intermediate heating part of the battery cell module, thereby realizing more sufficient heat exchange for the part to achieve heat dissipation.

[0007] Preferably, the side wall of the intermediate partition plate is in a stepped structure, so that the plurality of battery cells in the same assembly are arranged in a gradient and side by side.

[0008] The structure is simple, easy to manufacture and install, reasonable, has a smaller assembly volume, and can well meet the use requirements.

[0009] Preferably, the assembly carrier comprises: a plate member configured as an electrical connection plate of the battery cell; an end plate located at the end of the plate member, the end plate and the plate member constituting the accommodation space of the assembly one and the assembly two; and a binding belt for binding the assembly one and the assembly two in the accommodation space.

[0010] The plate member can realize electrical connection of the assembly one and the assembly two, and can also serve as a carrier of the assembly one and the assembly two. After limiting the two ends by the end plate, the binding belt can bind the assembly one and the assembly two, and then fix the entire module into a rigid whole, thereby meeting the actual use requirements.

[0011] Preferably, the intermediate partition plate comprises: a side plate one and a side plate two configured as the two side walls of the intermediate partition plate, the side plate one and the side plate two being respectively provided with a water inlet and a water outlet; and an air bag provided between the side plate one and the side plate two, the air bag having an air hole.

[0012] The battery cell module has strict assembly precision requirements. Since the side surface of the module has errors due to the size of the battery cell itself, and the tightness of the binding belt is inconsistent, a large gap may occur between the binding belt and the battery cell. At this time, the binding belt cannot have the expected pre-tightening effect on the battery cell, causing the battery cell to be easily deformed during use, resulting in performance degradation defects. The battery cell module has an expansion force during use, so there is a large safety hazard in the fixing structure. Therefore, the application solves the above defects by providing an air bag. During assembly, inflation of the air bag can drive the corresponding battery cell to displace, thereby avoiding assembly gaps between the binding belt and the battery cell by using the expansion of the air bag. During use, the flow of gas in the air bag can also absorb the extrusion force generated when the battery cell expands, thereby providing the required buffer, and thereby better meeting the use requirements.

[0013] Preferably, the air bag comprises a plurality of sub-bags arranged side by side, adjacent sub-bags being in communication with each other and having a partition.

[0014] When the air bag is inflated as a whole, the size of the inflated air bag cannot well balance the displacement of all the battery cells, so there can still be local battery cells that cannot be stably matched with the binding belt. Therefore, the air bag is divided into multiple sub-bags by multiple partition parts, so that the inflated sub-bags expand one by one to push the battery cells, thereby avoiding the assembly gap caused by insufficient pressure on the local battery cells.

[0015] Preferably, the extension direction of the partition part is perpendicular to the arrangement direction of the battery cells, so that adjacent two sub-bags in the same assembly form a concave part at the partition part after expansion. There is a vent between at least one end of the partition part and the air bag.

[0016] After each sub-bag is inflated, there is a relative concave part between adjacent sub-bags. At this time, the protruding part of each sub-bag, i.e. the side plate one and the side plate two, is in contact. At the same time, by the way of inflating sub-bags one by one, after one sub-bag is sufficiently expanded, gas flows into the next sub-bag, thereby better realizing the stable assembly of the battery cells.

[0017] Preferably, the end plate is provided with a positioning plate, and the positioning plate is provided with a flange part to limit the assembly one and the assembly two in the accommodation space. The flange part comprises: The flange one and the flange two are respectively located at both ends of the positioning plate, and the flange two is located between the flange one and the flange three.

[0018] The flange part can position the assembly one and the assembly two, thereby simplifying the installation and improving the assembly efficiency. The structure can realize three-side positioning of the assembly one and the assembly two, thereby providing assembly accuracy.

[0019] Preferably, any three adjacent battery cells in the same assembly are battery cell one, battery cell two and battery cell three. The negative electrode of the battery cell one is close to the positive electrode of the battery cell two, and the negative electrode of the battery cell two is close to the positive electrode of the battery cell three. In the side-by-side direction of the battery cells, the battery cell at the head end of the assembly one is used for external connection, and the battery cell at the head end of the assembly two is used for external connection. The battery cell at the tail end of the assembly one and the battery cell at the tail end of the assembly two are connected in series. The positive electrode of the battery cell at the tail end of the assembly one is close to the negative electrode of the battery cell at the tail end of the assembly two, or the negative electrode of the battery cell at the tail end of the assembly one is close to the positive electrode of the battery cell at the tail end of the assembly two. The polarity of the external connection electrode of the assembly one is opposite to that of the external connection electrode of the assembly two.

[0020] The structure makes the electrically conductive structure simple and easy to realize, effectively simplifies the structure and reduces the size, and well realizes miniaturization.

[0021] Preferably, the battery cells in the assembly one and the assembly two are sequentially electrically connected through electrode sheets, and the current guiding directions formed by the plurality of electrode sheets together present a square wave structure along the preset track.

[0022] The electric connection mode has simple structure and convenient operation, can well avoid cable wiring, and also avoids the safety hidden trouble caused by the cable wiring.

[0023] An assembling method of a battery cell module, comprising the following steps: The plurality of battery cells are configured as the assembly one and the assembly two, so that the battery cells in the assembly one and the assembly two are arranged in the same direction in a stepped manner; The air bag is pasted between the assembly one and the assembly two; The binding belt is sleeved on the outer side of the assembly one and the assembly two; The air bag is inflated, so that the assembly one and the assembly two are constrained by the binding belt.

[0024] Compared with the prior art, the battery cell module can reduce the heat dissipation dead angle, improve the heat exchange efficiency of the battery cells, and further improve the cooling effect. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is an exploded view of the embodiment of the present application; Figure 2 It is a sectional view of the embodiment of the present application; Figure 3 It is a schematic view of the intermediate partition plate in the embodiment of the present application; Figure 4 It is a schematic view of the intermediate partition plate in the embodiment of the present application; Figure 5 It is another schematic view of the intermediate partition plate in the embodiment of the present application; Figure 6 It is a top view of Figure 5 Figure 7 It is a schematic view of the air bag in the present application; Figure 8 It is an enlarged view of A of Figure 7 Figure 9 It is a schematic view of the end plate in the embodiment of the present application; Figure 10 It is a schematic view of the battery cell in the embodiment of the present application.

[0026] ​​In the diagram: 100-Component 1; 200-Component 2; 1-Intermediate partition; 2-Battery cell; 3-Step section; 4-Panel; 5-End plate; 6-Bundling strap; 7-Side plate 1; 8-Side plate 2; 9-Air bag; 10-Air hole; 11-Sub-bag; 12-Separator; 13-Ventilation port; 14-Positioning groove; 15-Positioning plate; 16-Flange 1; 17-Flange 2; 18-Flange 3; 19-Insulating foam; 20-Battery cell 1; 21-Battery cell 2; 22-Battery cell 3; 23-Electrode sheet. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to specific embodiments.

[0028] like Figures 1-5 As shown, a battery cell module includes an assembly carrier, a first component 100, a second component 200, and a middle partition 1. Multiple battery cells 2 are arranged side-by-side in both the first component 100 and the second component 200, which are disposed within the assembly carrier. The middle partition 1 is disposed between the first component 100 and the second component 200. The middle partition 1 has a hollow structure and includes an inlet and an outlet. The hollow space of the middle partition 1 gradually decreases from the middle to the end, so that adjacent battery cells 2 in the same component are misaligned, with the misalignment direction forming a preset angle with the side-by-side direction of the multiple battery cells 2.

[0029] In this embodiment, the battery cell 2 is an energy storage cell, which can be a lithium-ion battery (such as a lithium iron phosphate battery). The battery cell 2 is square in shape, and multiple battery cells 2 are arranged along a first direction to form a component 100 or a component 200. That is, both component 100 and component 200 have multiple battery cells 2 arranged along the first direction, while component 100 and component 200 are parallel in a second direction, which is perpendicular to the first direction. This structure is relatively simple. Based on this structure, the misalignment direction between battery cells 2 in the same component is perpendicular to the parallel direction of battery cells 2. That is, the preset angle is 90°. This structure is simple and can better achieve miniaturization. Based on this, in this embodiment, as... Figure 3 As shown, the sidewall of the intermediate partition 1 has a stepped structure so that multiple battery cells 2 in the same component are arranged side by side in a gradient. In order to improve the structural stability of the battery cell module and to minimize the volume, component one 100 and component two 200 are symmetrical with respect to the intermediate partition 1. Therefore, the stepped structure in this embodiment includes multiple step portions 3, that is, each step portion 3 corresponds to one of the battery cells 2 in component one 100 and one of the battery cells 2 in component two 200, and these two battery cells 2 are symmetrical with respect to the step portion 3.

[0030] In use, the cooling medium is introduced into the intermediate partition 1 from the water inlet. Since the space in the middle of the intermediate partition 1 is large, the flow of the cooling medium in this part is large, and thus the heat exchange efficiency is relatively high. Therefore, for the heat dissipation dead angle that is easily formed in the middle part of the two-row assembly, the heat can be dissipated by a large amount of cooling medium. In other words, the intermediate partition 1 can accelerate the transfer of the heat in this part to the outside, thereby reducing the heat dissipation dead angle and improving the heat exchange efficiency. In the present embodiment, the water inlet is arranged above the intermediate partition 1, and the water outlet is arranged at the side, so as to realize the smooth circulation of the cooling medium. The cooling medium is a mixture of water and ethylene glycol, and the ratio is preferably 1:1.

[0031] As shown in Figure 4 In some other embodiments, the side wall of the intermediate partition 1 is in an arc-shaped structure, that is, after the assembly one 100 and the assembly two 200 are assembled, the structure is in a petal shape. Although this structure can solve the heat dissipation difficulty caused by the heat dissipation dead angle, the overall structure is relatively complex, and is not conducive to miniaturization. For assembly, the positioning of the battery cell 2 is not easy to achieve, and the battery cell 2 is easily offset along the arc-shaped path of the side wall, thereby reducing the stability.

[0032] As shown in Figure 1 In the present embodiment, the assembly carrier includes a plate 4, an end plate 5 at the end of the plate 4, and a binding belt 6. The plate 4 is configured as a cell contact plate of the battery cell 2. The end plate 5 and the plate 4 constitute the accommodation space of the assembly one 100 and the assembly two 200. The binding belt 6 is used to bind the assembly one 100 and the assembly two 200 in the accommodation space. In the present embodiment, two binding belts 6 are provided, which are arranged side by side in a third direction perpendicular to the first direction and perpendicular to the second direction. In the present embodiment, the binding belt 6 is mainly made of high-strength stainless steel or galvanized steel, so that the binding belt 6 has good mechanical properties and weather resistance, and can maintain a stable physical form in extreme environments. When the galvanized steel is selected, the binding belt 6 is enhanced in corrosion resistance by surface treatment technology, and is suitable for battery systems used outdoors or in humid environments. In the present embodiment, the surface of the binding belt 6 is covered with an insulating layer to prevent short circuit caused by direct current passing through the binding belt 6, and to ensure the electrical safety of the battery system. The end plate 5 in the present embodiment is an aluminum extrusion, and the end plate 5 is provided with mounting holes for fixing the battery cell module, so as to ensure the stable installation of the battery cell module in the battery system, and prevent the displacement of the battery cell 2 caused by vibration, impact and other factors during transportation and use, thereby affecting the battery performance. The cell contact plate is a cell contact system (CCS), which includes a busbar, a flexible circuit board FPC and / or a rigid circuit board PCB, and an insulating support structure. In some embodiments, the cell contact system further includes a temperature sensor and / or a voltage acquisition terminal.

[0033] In this embodiment, the cavities at both ends of the middle partition 1 are small, while the cavity in the middle is large. Based on this structure, the binding strap 6 forms an arc shape on the side of the battery cell module after binding, thereby pressing the battery cell 2 onto the middle partition 1 at an adaptive angle. This avoids the situation where the binding strap 6 cannot restrain the battery cell 2. It should be emphasized that the structure of the middle partition 1 can achieve a good heat dissipation effect, ensuring that the largest heat-generating part in the middle of the battery cell module has the most cooling medium, thereby allowing for sufficient heat exchange between the battery cell 2 in the middle part.

[0034] Furthermore, such as Figures 5-7 As shown, in this embodiment, the intermediate partition 1 includes a first side plate 7 and a second side plate 8, as well as an air bag 9. The first side plate 7 and the second side plate 8 are configured as the two side walls of the intermediate partition 1, and the first side plate 7 and the second side plate 8 are respectively provided with a water inlet and a water outlet. The air bag 9 is disposed between the first side plate 7 and the second side plate 8, and the air bag 9 has air holes 10. The first side plate 7 and the second side plate 8 are both formed by brazing aluminum plates. After the air bag 9 is vented, it expands, thereby achieving a small drive on both sides of the battery cell 2 through the displacement of the first side plate 7 and the second side plate 8. That is, after the binding strap 6 is completed, by venting the air bag 9 to expand, the battery cell 2 is stably fixed between the binding strap 6 and the first side plate 7 (or the second side plate 8), thereby eliminating the assembly gap between the binding strap 6 and the first side plate 7 (or the second side plate 8), thereby improving the assembly stability of the battery cell 2. In this embodiment, the air bag 9 is made of a composite fabric of nylon and polyurethane, specifically including a nylon base layer and a polyurethane coating. The nylon base layer has high strength and tear resistance, withstands the tensile stress of repeated inflation / deflation, prevents the air bag 9 from rupturing, and ensures its service life. The polyurethane coating achieves high airtightness, preventing gas leakage, while also improving the fabric's flexibility, allowing the air bag 9 to fit snugly against the battery cell 2 and ensuring the battery cell 2's position. In this embodiment, the gas pressure inside the air bag 9 ranges from 10 to 80 kPa. Therefore, the size of the battery cell module in the second direction can be ensured by adjusting the inflation pressure; that is, the size of the battery cell module in the second direction can be appropriately adjusted by controlling the inflation pressure.

[0035] When assembling the strapping 6, the air bag 9 is not inflated. It is first glued to the side plate 7 and side plate 8 using 3M adhesive. At this time, the size of the battery cell module in the second direction is relatively small, and the strapping 6 can be easily fitted over the outside of all the battery cells 2. After the strapping 6 is fitted, the air bag 9 is inflated, causing the side plate 7 and side plate 8 to move in the forward and / or reverse direction in the second direction, thereby causing the battery cell 2 to move in the forward and / or reverse direction in the second direction, thus being stably restrained by the strapping 6. On this basis, the air bag 9 can absorb the compressive force when the battery cell 2 expands, absorbing part of the manufacturing tolerance.

[0036] In order to realize the displacement adjustment of the battery cell 2 in the second direction, the air bag 9 needs to cover all the battery cells 2 arranged in the first direction in the first direction, so when the air bag 9 is inflated, all the battery cells 2 may be displaced, although the gas has fluidity, but it may still cause the local battery cell 2 to be out of position, and further, the air bag 9 includes a plurality of sub-bags 11 arranged side by side, and the adjacent sub-bags 11 are communicated with each other and have a partition 12. When the position of the battery cell 2 is adjusted, each sub-bag 11 only has the force of the side plate one 7 and the side plate two 8 at its position, so that during the inflation of the sub-bags 11 one by one, the relative position of the side plate one 7 and the side plate two 8 driven by the previous sub-bag 11 is unchanged, so that the positioning effect of the battery cell 2 reached by the inflation of the next sub-bag 11 is better, compared with the inflation of the air bag 9 as a whole, the interference generated by the relative movement of the adjacent sub-bags 11 driving the corresponding battery cell 2 is small, and the inflation of the next sub-bag 11 can avoid affecting the position positioning of the battery cell 2 by the previous sub-bag 11, thereby better improving the assembly stability. As shown in Figure 7 and Figure 8 In the embodiment, the extension direction of the partition 12 is perpendicular to the arrangement direction of the battery cell 2, so that after the inflation of the adjacent two sub-bags 11 in the same assembly, a recess is formed at the partition 12; and the partition 12 has an air vent 13 between at least one end and the air bag 9. Specifically, the air vent 13 is arranged above and below the partition 12, so as to realize the flow of the gas. When the air hole 10 is opened during inflation, due to the small size of the air vent 13, each sub-bag 11 is basically inflated one by one, and the reaction force of the intermediate partition 1 and the binding belt 6 on the corresponding sub-bag 11 can be used to guide the gas, so that the gas quickly enters the next sub-bag 11 from one sub-bag 11, thereby realizing reliable and stable installation of all the battery cells 2. It can be known that during the inflation process of the previous sub-bag 11, the gas will not flow into the next sub-bag 11, but the flow is small and cannot well drive the side plate one 7 and / or the side plate two 8.

[0037] Therefore, the embodiment further discloses an assembly method of a battery cell module, including the following steps: S101, configuring a plurality of battery cells 2 as an assembly one 100 and an assembly two 200, and arranging the battery cells 2 in the assembly one 100 and the assembly two 200 in the same direction in a stepped manner; S102, pasting an air bag 9 between the assembly one 100 and the assembly two 200; S103, sleeving a binding belt 6 outside the assembly one 100 and the assembly two 200; S104, inflating the air bag 9 to make the air bag 9 expand and make the assembly one 100 and the assembly two 200 be restrained by the binding belt 6.

[0038] Further, a side plate one 7 is arranged at the side of the assembly one 100 close to the assembly two 200, a side plate two 8 is arranged at the side of the assembly two 200 close to the assembly one 100, and a gas bag 9 is pasted between the side plate one 7 and the side plate two 8. Then, the bundling belt 6 is sleeved, and the gas bag 9 is inflated. After that, the sub-bags 11 separated by the gas bag 9 expand one by one along the first direction, so that each battery cell 2 can be stably restrained by the bundling belt 6, and the stable assembly is completed.

[0039] In the embodiment, as shown in Figure 9 The end plate 5 is provided with a positioning groove 14, and the groove bottom of the positioning groove 14 is arc-shaped. The positioning groove 14 cooperates with the bundling belt 6. In the embodiment, the bundling belt 6 is positioned in the positioning groove 14 to restrain the battery cell 2, and the structure is simple and convenient to operate. Compared with the arc-shaped side edge formed by binding the battery cell module by the bundling belt 6, the bundling belt 6 has a cooperation part with an arc close to 90°. By cooperating the cooperation part with the arc-shaped groove bottom of the positioning groove 14, the binding structure is more stable, and the stress is more uniform.

[0040] In the embodiment, as shown in Figure 9 The end plate 5 is provided with a positioning plate 15, and the positioning plate 15 is provided with a flange part to limit the assembly one 100 and the assembly two 200 in the accommodation space. Further, the flange part includes a flange one 16, a flange two 17, and a flange three 18. The flange one 16 and the flange three 18 are respectively located at two ends of the positioning plate 15, and the flange two 17 is located between the flange one 16 and the flange three 18. The flange one 16, the flange two 17, and the flange three 18 constitute a limiting structure. The positioning plate 15 as a whole extends along the second direction, and three edges are folded to form the flange one 16, the flange two 17, and the flange three 18 facing the first direction. Thus, the size in the second direction is determined by the flange one 16 and the flange three 18, and the relative position of the assembly one 100 and the assembly two 200 in the assembly carrier is determined by the flange two 17.

[0041] As shown in Figure 10 In order to better realize the installation of the battery cell 2, the insulating foam 19 is arranged between the adjacent battery cells 2 of the same assembly. The insulating foam 19 not only can realize reliable electrical insulation and effectively guarantee the safety of electricity use, but also has excellent deformability, which can effectively ensure the binding stability of the bundling belt 6. At the same time, when encountering external impact, the foam can fully play a shock-absorbing effect, and further improve the overall use safety and reliability.

[0042] In the embodiment, any three adjacent battery cells 2 in the same assembly are battery cell one 20, battery cell two 21 and battery cell three 22, the negative electrode of the battery cell one 20 is adjacent to the positive electrode of the battery cell two 21, and the negative electrode of the battery cell two 21 is adjacent to the positive electrode of the battery cell three 22; in the side-by-side direction of the battery cells 2, the battery cell 2 at the head of the assembly one 100 is used for external connection, and the battery cell 2 at the head of the assembly two 200 is used for external connection; the battery cell 2 at the tail of the assembly one 100 and the battery cell 2 at the tail of the assembly two 200 are connected in series, the positive electrode of the battery cell 2 at the tail of the assembly one 100 is adjacent to the negative electrode of the battery cell 2 at the tail of the assembly two 200; the polarity of the external connection electrode of the assembly one 100 is opposite to the polarity of the external connection electrode of the assembly two 200. In other embodiments, the negative electrode of the battery cell 2 at the tail of the assembly one 100 is adjacent to the positive electrode of the battery cell 2 at the tail of the assembly two 200.

[0043] The structure is conducive to power connection, so that the battery cells 2 are connected quickly through the electrode tabs 23, avoiding the use of complex cable wiring and the safety hazards caused by cable wiring. The battery cells 2 in the assembly one 100 and the assembly two 200 are sequentially connected by the power connection mode of the square wave structure, thereby realizing the advantages of simple structure and convenient power connection.

[0044] That is, the battery cells 2 in the assembly one 100 and the assembly two 200 are sequentially connected by the electrode tabs 23, the current guiding direction formed by the plurality of electrode tabs 23 together presents a square wave structure along a preset trajectory, and further, for the assembly one 100 and the assembly two 200, the square wave structure is composed of alternating horizontal current segments and vertical current segments, as an implementation, the extension directions of the horizontal current segments are consistent and the lengths are equal, and the extension directions of the vertical current segments are consistent and the lengths are equal; along the trajectory of the square wave structure, one electrode of a previous battery cell 2 is electrically connected to another electrode of a subsequent battery cell 2 through a corresponding electrode tab 23, so that the current sequentially flows through the battery cells 2 and is alternately conducted along the horizontal current segments and the vertical current segments.

[0045] The above is only a preferred embodiment of the present application, and it should be pointed out that the above preferred embodiment should not be regarded as a limitation of the present application, and the protection scope of the present application should be limited by the scope defined by the claims. For ordinary skilled persons in the art, several improvements and refinements can be made without departing from the spirit and scope of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. An electric cell module, characterized by comprising: The application relates to a battery assembly. The battery assembly comprises: an assembly carrier; a first assembly and a second assembly, each of which is provided with a plurality of battery cells arranged side by side, and is arranged in the assembly carrier; and an intermediate partition plate arranged between the first assembly and the second assembly, the intermediate partition plate is a hollow structure, and the intermediate partition plate is provided with a water inlet and a water outlet; 2. The battery cell module of claim 1, wherein, wherein the hollow space of the intermediate partition plate gradually decreases from the middle part to the end part, so that the adjacent battery cells in the same assembly are staggered, and the staggered direction and the side-by-side direction of the plurality of battery cells form a preset angle.

3. The battery cell module of claim 1, wherein, The side wall of the intermediate partition plate is a stepped structure, so that the plurality of battery cells in the same assembly are arranged side by side in a gradient. The assembly carrier comprises: a plate member configured as an electrically connected plate of the battery cell; an end plate arranged at the end part of the plate member, the end plate and the plate member form a containing space of the first assembly and the second assembly; and 4. An electric cell module as claimed in claim 3, characterized in that a binding belt used for binding the first assembly and the second assembly in the containing space. The intermediate partition plate comprises: a first side plate and a second side plate configured as the side walls on both sides of the intermediate partition plate, the first side plate and the second side plate are respectively provided with the water inlet and the water outlet; and 5. An electric cell module as claimed in claim 4, characterized in that an air bag arranged between the first side plate and the second side plate, the air bag is provided with an air hole.

6. An electric cell module as claimed in claim 5, characterized in that The air bag comprises a plurality of sub-bags arranged side by side, the adjacent sub-bags are communicated with each other and are provided with a partition part. The extension direction of the partition part is perpendicular to the arrangement direction of the battery cell, so that, after the adjacent two sub-bags in the same assembly are inflated, a concave part is formed at the partition part; 7. An electric cell module as claimed in claim 6, characterized in that an air vent is arranged between at least one end part of the partition part and the air bag. The end plate is provided with a positioning plate, the positioning plate is provided with a turn-up part, and the first assembly and the second assembly are limited in the containing space by the turn-up part. The turn-up part comprises:

8. The battery cell module of claim 1, wherein, a first turn-up part, a second turn-up part and a third turn-up part, the first turn-up part and the second turn-up part are respectively arranged at the two ends of the positioning plate, and the second turn-up part is arranged between the first turn-up part and the third turn-up part. In any three adjacent battery cells in the same assembly, a first battery cell, a second battery cell and a third battery cell, the negative electrode of the first battery cell is close to the positive electrode of the second battery cell, and the negative electrode of the second battery cell is close to the positive electrode of the third battery cell. In the side-by-side direction of the battery cell, the battery cell at the head end of the first assembly is used for external connection, and the battery cell at the head end of the second assembly is used for external connection; the battery cell at the tail end of the first assembly and the battery cell at the tail end of the second assembly are connected in series, and the positive electrode of the battery cell at the tail end of the first assembly is close to the negative electrode of the battery cell at the tail end of the second assembly, or the negative electrode of the battery cell at the tail end of the first assembly is close to the positive electrode of the battery cell at the tail end of the second assembly.

9. An electric cell module as claimed in claim 8, characterized in that The polarity of the external connection electrode of the first assembly is opposite to that of the second assembly.

10. A method of assembling a module of cells, characterized in that, The battery cells in the first assembly and the second assembly are sequentially electrically connected through electrode sheets, and the current guide direction formed by the plurality of electrode sheets forms a square wave structure along a preset track. The application further discloses a method for assembling the battery assembly. The method comprises the following steps: a plurality of battery cells are configured as the first assembly and the second assembly, so that the battery cells in the first assembly and the second assembly are arranged in a stepped manner in the same direction; an air bag is pasted between the first assembly and the second assembly; a binding belt is sleeved on the outer side of the first assembly and the second assembly; the air bag is inflated, so that the first assembly and the second assembly are constrained by the binding belt.

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