Battery module and battery pack

Abstract

To provide a battery module and a battery pack.SOLUTION: A battery module includes a mounting frame, a battery cell assembly, and a connection assembly. The battery cell assembly includes two battery cell groups distributed in the mounting frame along a first direction. The battery cell groups include a plurality of battery cell units sequentially distributed along a second direction. The battery cell units include two battery cells sequentially distributed along the second direction, and the battery cells include a first electrode column and a second electrode column distributed along the first direction. The first electrode column of the two battery cells distributed and adjacent along the first direction is close to each other. The first electrode column of the two battery cells distributed and adjacent along the first direction is connected via a first connection component of the connection assembly, and the second electrode column of the two battery cells of the battery cell unit is connected via the second connection component of the connection assembly.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present application claims priority from a Chinese patent application filed with the China National Intellectual Property Administration on April 2, 2024 with application number 202420680874.5, and an international application filed with the China National Intellectual Property Administration on October 17, 2024 with application number PCT / CN2024 / 125558, the entire contents of which are incorporated herein by reference. The present application relates to the field of battery technology, in particular to a battery module and a battery pack.

Background Art

[0002] In the related art, multiple rows of battery cells of a battery module are installed in a mounting frame. During charging and discharging, the battery cells generate a relatively large expansion force in the arrangement direction of the battery cells. This expansion force acts on end plates on both sides of the mounting frame in the arrangement direction of the battery cells, and pushes the end plates on both sides of the mounting frame to bend and deform, thereby causing displacement of the battery cells in the arrangement direction of the battery cells.

Summary of the Invention

Problem to be Solved by the Invention

[0003] However, since the deformation resistance capacity of the central portions of the end plates on both sides of the mounting frame is relatively weak, the central portions of the end plates on both sides of the mounting frame produce greater bending deformation under the action of the expansion force, which causes relatively large displacement of the electrode posts corresponding to the central positions of the end plates on both sides of the mounting frame among the battery cells, further subjects the electrode posts to relatively large shear force or torque, and easily leads to damage of the electrode posts of the battery cells.

Means for Solving the Problem

[0004] This application provides a battery module. The battery module includes a mounting frame, a battery cell assembly, and a connection assembly, wherein the battery cell assembly includes two groups of battery cells distributed within the mounting frame along a first direction, the groups of battery cells include a plurality of battery cell units sequentially distributed along a second direction, each battery cell unit includes two battery cells sequentially distributed along the second direction, each battery cell includes a first electrode column and a second electrode column distributed along the first direction, the first electrode columns of two adjacent battery cells distributed along the first direction are close to each other, the first direction and the second direction form an angle, the connection assembly includes a plurality of first connecting parts and a plurality of second connecting parts, the first electrode columns of two adjacent battery cells distributed along the first direction are connected via the first connecting parts, and the second electrode columns of two of the battery cells in the battery cell unit are connected via the second connecting parts.

[0005] This application provides a battery pack. The battery pack includes a case and a battery module, wherein the battery module is the above-described battery module and the battery module is provided inside the case. The battery module includes a mounting frame, a battery cell assembly, and a connection assembly, wherein the battery cell assembly includes two groups of battery cells distributed within the mounting frame along a first direction, the battery cell groups include a plurality of battery cell units sequentially distributed along a second direction, each battery cell unit includes two battery cells sequentially distributed along the second direction, each battery cell includes a first electrode column and a second electrode column distributed along the first direction, the first electrode columns of two adjacent battery cells distributed along the first direction are close to each other, the first direction and the second direction form an angle, the connection assembly includes a plurality of first connecting components and a plurality of second connecting components, the first electrode columns of two adjacent battery cells distributed along the first direction are connected via the first connecting components, and the second electrode columns of two battery cells in the battery cell unit are connected via the second connecting components. [Effects of the Invention]

[0006] The battery module provided in this application connects the first electrode columns of two adjacent battery cells distributed along a first direction via a first connecting component, and connects the second electrode columns of two battery cells in a battery cell unit via a second connecting component, thereby enabling multiple battery cells in a battery cell assembly to be connected in series or parallel via multiple first and second connecting components of the connecting assembly. Furthermore, since the amount of expansion displacement in the second direction is basically the same for the first electrode columns of two adjacent battery cells distributed along a first direction, after connecting the first electrode columns of two adjacent battery cells distributed along a first direction via a first connecting component, the distance between the two first electrode columns connected to the first connecting component is kept basically constant by synchronously displacing the first connecting component connected to the first electrode column, and the force acting between the first connecting component and the two first electrode columns is also kept basically constant. Therefore, the problem of the first electrode column being damaged by a relatively large shear force or torque after the battery cell expands and causes displacement in the first electrode column can be avoided.

[0007] The battery pack provided in this application connects the first electrode columns of two adjacent battery cells distributed along a first direction of the battery module via a first connecting component, and connects the second electrode columns of two battery cells of the battery cell unit via a second connecting component. As a result, after the battery cells expand, the first electrode columns of two adjacent battery cells distributed along the first direction synchronously displace the first connecting component connected to the first electrode columns, thereby keeping the distance between the two first electrode columns connected to the first connecting component essentially constant, and also keeping the force acting between the first connecting component and the two first electrode columns essentially constant. Therefore, after the battery cells expand and displace the first electrode columns, the problem of the first electrode columns being damaged by relatively large shear forces or torques can be avoided, thereby increasing the stability of the battery pack. [Brief explanation of the drawing]

[0008] [Figure 1]This is an exploded view of one embodiment of a battery module provided by the embodiments of this application. [Figure 2] This is a diagram showing the combined structure of one embodiment of a battery cell assembly, connection assembly, and signal acquisition circuit provided by the embodiments of this application. [Figure 3] This is a diagram illustrating the combined structure of one embodiment of a battery module mounting frame, battery cell assembly, connection assembly, and signal acquisition circuit provided by the embodiments of this application. [Figure 4] This is an exploded view of one embodiment of the mounting frame provided by the present invention. [Modes for carrying out the invention]

[0009] Multiple battery cells in a battery module are mounted within a mounting frame, and the battery cells undergo expansion and deformation during the charging and discharging process. When the battery cells expand, a relatively large expansion force is generated in the direction of the arrangement of the battery cells. This expansion force acts on both sides of the mounting frame in the direction of the battery cell arrangement, pushing and bending the mounting frame on both sides, causing the battery cells to displace in the direction of their arrangement. Correspondingly, the battery cells are displaced in their respective arrangement directions.

[0010] Here, since the ends of the mounting frame on both sides in the direction of the battery cell arrangement are connected to other structures of the mounting frame, these other structures apply tensile force to the ends of the mounting frame, limiting the amount of bending deformation at the ends of the mounting frame and thus strengthening the deformation resistance of the ends of the mounting frame, while the deformation resistance of the central parts on both sides of the mounting frame is relatively weak. When both sides of the mounting frame are pressed by the expansion force of the battery cells, the central parts on both sides of the mounting frame undergo greater bending deformation than the ends, resulting in greater displacement at the positions corresponding to the central parts of both sides of the mounting frame and the battery cells compared to the positions corresponding to the ends of both sides of the mounting frame and the battery cells.

[0011] In particular, when a battery module includes two rows of battery cells installed in parallel, the distance between the two rows of battery cells corresponds to the central positions on both sides of the mounting frame. Therefore, when the battery cells expand, the ends of the two rows of battery cells that are close to each other experience relatively large displacements in the direction of the battery cell arrangement. Furthermore, the closer the battery cells are to the sides of the mounting frame, the greater the displacement of one end of the battery cell that corresponds to the central positions on both sides of the mounting frame. Correspondingly, the displacement of the electrode post located at the end of the battery cell that corresponds to the central positions on both sides of the mounting frame also increases, and the distance between two adjacent battery cells and the electrode post at the end of the battery cell that corresponds to the central positions on both sides of the mounting frame also increases in the direction of the battery cell arrangement.

[0012] In the related technology, a mounting frame formed by end plates and side plates will be described as an example. The mounting frame includes two end plates installed opposite each other along the arrangement direction of the multiple battery cells, and two side plates extending along the arrangement direction of the multiple battery cells. The ends of the two end plates are connected one-to-one via the side plates, enclosing each other to form a chamber for mounting the multiple battery cells. When the battery cells expand and exert an expansion force on the end plates, the ends of the end plates are subjected to the tensile force of the side plates, while the central part of the end plates is not subjected to the tensile force of the side plates. As a result, the central part of the end plates undergoes greater bending deformation than the ends of the end plates, causing a larger displacement at the position corresponding to the battery cells and the central part of the end plates.

[0013] Furthermore, in related technologies, in the arrangement direction of battery cells, two adjacent battery cells and one end electrode column corresponding to the central part on both sides of the mounting frame are connected via a connecting sheet. As the distance between the two electrode columns connected to the connecting sheet increases, the connecting sheet applies a relatively large shear force or torque to the electrode columns, easily leading to a situation where the electrode columns of the battery cells are damaged.

[0014] To avoid the above problems, the embodiments of this application provide a battery module.

[0015] Figure 1 is an exploded view of one embodiment of a battery module provided by the embodiments of this application. As shown in Figure 1, the battery module 100 includes a mounting frame 110, a battery cell assembly 120, and a connection assembly 130, wherein the battery cell assembly 120 includes a plurality of battery cells 1211 provided within the mounting frame 110, each battery cell 1211 including a first electrode column 1212 and a second electrode column 1213, and the connection assembly 130 is electrically connected to the first electrode column 1212 and the second electrode column 1213 of the plurality of battery cells 1211 of the battery cell assembly 120 to enable series or parallel connection between the plurality of battery cells 1211 of the battery cell assembly 120.

[0016] As shown in Figures 1 to 3, the battery cell assembly 120 includes two battery cell groups 121 distributed within the mounting frame 110 along a first direction X, and each battery cell group 121 includes a plurality of battery cell units 1210 sequentially distributed along a second direction Y, and each battery cell unit 1210 includes two battery cells 1211 sequentially distributed along the second direction Y, with the first direction X and the second direction Y forming an angle. That is, the battery module 100 includes two rows of battery cells 1211 provided within the mounting frame 110, the two rows of battery cells 1211 are distributed along the first direction X, and the battery cells 1211 in each row are sequentially arranged along the second direction Y. Here, the first direction X may be perpendicular to the second direction Y, or the angle formed by the intersection of the first direction X and the second direction Y may be acute.

[0017] Furthermore, the battery cell group 121 may include one or more independent battery cells 1211 in addition to the battery cell unit 1210, and the one or more independent battery cells 1211 and the multiple battery cell units 1210 are distributed along the second direction Y. Also, the battery cell assembly 120 may include three, four or more battery cell groups 121, and the multiple battery cell groups 121 are sequentially distributed within the mounting frame 110 along the first direction X.

[0018] Here, the battery cell 1211 includes a first electrode post 1212 and a second electrode post 1213 distributed along the first direction X. Accordingly, the thickness direction of the battery cell 1211 is parallel to the second direction Y. When a plurality of battery cells 1211 expand, the plurality of battery cells 1211 are displaced mainly along the second direction Y, which further causes displacement of the first electrode post 1212 and the second electrode post 1213 of the battery cell 1211 along the second direction Y.

[0019] It should be noted that the polarities of the first electrode post 1212 and the second electrode post 1213 are opposite. The first electrode post 1212 may be a positive electrode post and the second electrode post 1213 may be a negative electrode post, or the first electrode post 1212 may be a negative electrode post and the second electrode post 1213 may be a positive electrode post. Specifically, the polarity can be determined based on the wiring scheme of the plurality of battery cells 1211 in the battery module 100.

[0020] Continuing to refer to FIGS. 1 to 3, the first electrode posts 1212 of two adjacent battery cells 1211 distributed along the first direction X are close to each other. And the second electrode posts 1213 of two adjacent battery cells 1211 distributed along the first direction X are spaced apart from each other.

[0021] Here, the first electrode post 1212 of the battery cell 1211 corresponds to the central portions on both sides of the mounting frame 110, and the second electrode post 1213 of the battery cell 1211 corresponds to the end portions on both sides of the mounting frame 110. After the battery cells 1211 expand, the displacement generated by the first electrode posts 1212 of two adjacent battery cells 1211 distributed along the first direction X is equal, and the displacement generated by the battery cell 1211 in the second direction Y is larger than the displacement generated by the second electrode post 1213 in the second direction Y. At the same time, the closer to the first electrode post 1212 of the battery cell 1211 along both sides of the mounting frame 110 in the second direction Y, the larger the generated displacement becomes, which leads to an increase in the distance between the first electrode posts 1212 of two adjacent battery cells 1211 along the second direction Y.

[0022] When the first electrode posts 1212 of two battery cells 1211 adjacent along the second direction Y are connected via a connecting component, the first electrode posts 1212 of two battery cells 1211 adjacent along the second direction Y may be subjected to large shearing force or torque, which further causes the problem that the first electrode posts 1212 of the battery cells 1211 are damaged.

[0023] In order to avoid the above problem, in some embodiments, the connection assembly 130 comprises a plurality of first connecting components 131 and a plurality of second connecting components 132, the first electrode posts 1212 of two adjacent battery cells 1211 distributed along the first direction X are connected via the first connecting components 131, and the second electrode posts 1213 of two battery cells 1211 of the battery cell unit 1210 are connected via the second connecting components 132.

[0024] Thereby, the plurality of first connecting components 131 and second connecting components 132 of the connection assembly 130 can connect the plurality of battery cells 1211 of the battery cell assembly 120 in series or in parallel. In addition, since the expansion displacement amounts in the second direction Y of the first electrode posts 1212 of two adjacent battery cells 1211 distributed along the first direction X are substantially the same, after connecting the first electrode posts 1212 of two adjacent battery cells 1211 distributed along the first direction X via the first connecting components 131, the first electrode posts 1212 of two adjacent battery cells 1211 distributed along the first direction X can synchronously displace the first connecting components 131 connected to the first electrode posts 1212. That is, when the battery cells 1211 expand, the distance between the two first electrode posts 1212 connected to the first connecting component 131 is kept substantially constant, and the acting force between the first connecting component 131 and the two first electrode posts 1212 is also kept substantially constant. Therefore, after the battery cells 1211 expand and cause displacement of the first electrode posts 1212, the problem that the first electrode posts 1212 are damaged due to the first electrode posts 1212 being subjected to relatively large shearing force or torque can be avoided.

[0025] Here, the multiple first connecting components 131 of the connection assembly 130 are arranged in a line along the second direction Y. The number of multiple first connecting components 131 is equal to the number of battery cells 1211 included in the battery cell group 121, and some of the multiple first connecting components 131 are electrically connected one-to-one with the first electrode columns 1212 of multiple battery cells 1211 of one battery cell group 121, while other parts of the multiple first connecting components 131 are electrically connected one-to-one with the first electrode columns 1212 of multiple battery cells 1211 of another battery cell group 121, thereby enabling the first electrode columns 1212 of two adjacent battery cells 1211 distributed along the first direction X to be connected via the first connecting components 131.

[0026] In some embodiments, the polarity of the first electrode columns 1212 of two adjacent battery cells 1211 distributed along a first direction X can be reversed. This allows two adjacent battery cells 1211 distributed along a first direction X to be connected in series via a first connector 131. Here, one of the two first electrode columns 1212 connected to the first connector 131 is the positive electrode column and the other is the negative electrode column, thereby connecting the two battery cells 1211 distributed along the first direction X via the first connector 131 in series.

[0027] Similarly, the polarity of the second electrode posts 1213 of the two battery cells 1211 of the battery cell unit 1210 can be reversed. This connects the two battery cells of the battery cell unit 1210 in series via the second connecting component 132. Here, one of the two second electrode posts 1213 connected to the second connecting component 132 is the positive electrode post and the other is the negative electrode post, thereby connecting the second electrode posts 1213 of the two battery cells 1211 of the battery cell unit 1210 in series via the second connecting component 132.

[0028] In some preferred embodiments, the polarity of the first electrode posts 1212 of two adjacent battery cells 1211 distributed along a first direction X can be reversed, and the polarity of the second electrode posts 1213 of two battery cells 1211 of a battery cell unit 1210 can be reversed. The first electrode posts 1212 of two adjacent battery cells 1211 of two battery cell units 1210 of one battery cell group 121 and the first electrode posts 1212 of two battery cells 1211 of one battery cell unit 1210 of another battery cell group 121 are connected one-to-one via two first connecting components 131, thereby enabling the multiple first connecting components 131 and the multiple second connecting components 132 to sequentially connect the multiple battery cells 1211 of the two battery cell groups 121 in the dashed line direction in Figure 3.

[0029] As shown in Figures 1 to 3, the battery module 100 further includes a signal acquisition circuit 140 extending along a second direction Y, with a plurality of first connecting components 131 and a plurality of second connecting components 132 each electrically connected to the signal acquisition circuit 140. This allows the voltage signals of the electrode columns 1212 of each battery cell 1211 to be acquired via the signal acquisition circuit 140.

[0030] In some embodiments, the signal acquisition circuit 140 includes two signal acquisition harnesses 141 extending along a second direction Y, the two signal acquisition harnesses 141 distributed on both sides of a first connector 131 along a first direction X, and the signal acquisition harnesses 141 are electrically connected to a second connector 132 located on both sides along the first direction X and to some of the first connector 131.

[0031] Here, some of the multiple first connecting components 131 are electrically connected to one signal acquisition harness 141, and other parts of the multiple first connecting components 131 are electrically connected to another signal acquisition harness 141, so that each first connecting component 131 is electrically connected to the signal acquisition circuit 140.

[0032] Specifically, the first connecting components 131 that are spaced apart among the multiple first connecting components 131 are electrically connected to one signal acquisition harness 141, and the other first connecting components 131 of the multiple first connecting components 131 are electrically connected to another signal acquisition harness 141. Of course, adjacent first connecting components 131 among the multiple first connecting components 131 may be electrically connected to one signal acquisition harness 141, and other parts of the first connecting components 131 of the multiple first connecting components 131 may be electrically connected to another signal acquisition harness 141.

[0033] As shown in Figure 1, the battery module 100 further includes an insulating plate 150 covering the battery cell assembly 120, and the connection assembly 130 and signal acquisition circuit 140 are provided on the side of the insulating plate 150 away from the battery cell assembly 120, thereby separating the battery cells 1211 of the battery cell module 120 from the connection assembly 130 and signal acquisition circuit 140, and preventing the connection assembly 130 or the signal acquisition circuit 140 from short-circuiting the battery cells 1211 of the battery cell module 120. Here, the insulating plate 150 has a plurality of connection holes 155, some of which are provided for the electrical connection of a first connection component 131 and a first electrode post 1212, or some of which are provided for the electrical connection of a second connection component 132 and a second electrode post 1213. The plurality of connection holes 155 include first connection holes 153 and second connection holes 154 provided in the insulating plate 150. The first connection hole 153 is provided for electrical connection between the first connecting component 131 and the first electrode column 1212, and the second connection hole 154 is provided for electrical connection between the second connecting component 132 and the second electrode column 1213.

[0034] Specifically, the first connecting component 131 and the second connecting component 132 are provided in the form of a plate or piece. A first mounting groove 151 is provided on the side of the insulating plate 150 away from the battery cell assembly 120 for mounting the first connecting component 131, and a first connection hole 153 is provided at the bottom of the first mounting groove 151. The first connecting component 131 is mounted in the first mounting groove 151 and is electrically connected to the first electrode column 1212 of the battery cell 1211 through the first connection hole 153 at the bottom of the first mounting groove 151. A second mounting groove 152 is provided on the side of the insulating plate 150 away from the battery cell assembly 120 for mounting a second connecting component 132, and a second connecting hole 154 is provided at the bottom of the second mounting groove 152. The second connecting component 132 is mounted within the second mounting groove 152 and is electrically connected to the second electrode column 1213 of the battery cell 1211 through the second connecting hole 154 at the bottom of the second mounting groove 152. The first connecting component 131 and the second connecting component 132 and the electrode column 1212 of the battery cell 1211 may be fixedly connected by welding.

[0035] As shown in Figure 1, the mounting frame 110 includes two end plates 111 facing each other along a second direction Y and two side plates 112 facing each other along a first direction X, the ends of the end plates 111 connected one-to-one with the ends of the two side plates 112 and enclosing each other to form a chamber 115. The battery cell assembly 120 is housed within the chamber 115 of the mounting frame 110.

[0036] In some embodiments, as shown in Figures 1 and 4, the mounting frame 110 further includes a connecting plate 113 extending along a second direction Y, the ends of which the connecting plate 113 along the second direction Y are connected to two end plates 111, respectively, thereby dividing the chamber 115 into two sub-chambers 1151. The battery cell group 121 is provided in the two sub-chambers 1151 in a one-to-one correspondence.

[0037] By connecting the connecting plate 113 to the two end plates 111 along both ends in the second direction Y, and dividing the chamber 115 into two sub-chambers 1151 provided to accommodate the battery cell group 121, a tensile force can be applied to the intermediate portion of the two end plates 111 on the connecting plate 113. When multiple battery cells 1211 of the battery cell group 121 expand, causing displacement of the central part of the end plate 111 in the second direction Y, the connecting plate 113 can apply a tensile force to the central part of the end plate 111, thereby limiting the amount of deformation of the central part of the end plate 111. Furthermore, by limiting the amount of displacement of the first electrode columns 1212 of two adjacent battery cells 1211 distributed along the first direction X in the second direction Y, it is understood that the large shear force and torque caused by the displacement of the first electrode columns 1212 of the battery cells 1211 can be further reduced.

[0038] In some embodiments, as shown in Figures 1 and 4, an adhesive layer 114 is provided on the side of the connecting plate 113 facing the sub-chamber 1151, and this adhesive layer 114 is bonded to the side of the battery cell 1211. As a result, when multiple battery cells 1211 of the battery cell group 121 expand, the connecting plate 113 can apply a tensile force to the battery cells 1211 via the adhesive layer to prevent displacement of the battery cells 1211, thereby reducing to some extent the amount of displacement of the first electrode column 1212 of the battery cell 1211 in the second direction Y.

[0039] Specifically, adhesive layers 114 are provided on both sides of the connecting plate 113 facing the two sub-chambers 1151, so that both sides of the adhesive layer 113 are bonded to the sides of the multiple battery cells 1211 of the corresponding battery cell group 121 via the adhesive layer 114.

[0040] In some embodiments, the connecting plate 113 can be welded to the end plate 111, thereby increasing the connection stability between the end of the connecting plate 113 and the end plate 111, allowing the connecting plate 113 to apply greater tensile force to the central part of the end plate 111, and further enhancing the effect of limiting the deformation of the central part of the end plate 111.

[0041] Specifically, as shown in Figures 1 and 4, a through hole 1111 is provided in the end plate 111, and this through hole 1111 penetrates the end plate 111 along the second direction Y, and the end of the connecting plate 113 along the second direction Y protrudes through the through hole 1111 and on the side of the end plate 111 away from the chamber 115. This allows the end plate 111 and the connecting plate 113 to be welded from the side of the end plate 111 away from the chamber 115, making the operation more convenient. Of course, the connecting plate 113 and the end plate 111 may be connected by screw connection, engagement or other methods, as long as the connecting plate 113 can apply tensile force to the end plate 111 and the amount of deformation of the central part of the end plate 111 is kept small.

[0042] Embodiments of this application further provide a battery pack, which includes a battery module, the specific structure of which refers to the above embodiment. Since this battery pack employs all the technical concepts of the above embodiment, it has at least all the beneficial effects brought about by the technical concepts of the above embodiment, which will not be described in detail here.

[0043] Here, the battery pack includes a case and a battery module, the battery module may be the battery module in any of the embodiments described above, and the battery module is provided inside the case. [Explanation of symbols]

[0044] 100: Battery module, 110: Mounting frame, 111: End plate, 1111: Through hole, 112: Side plate, 113: Connection plate, 114: Adhesive layer, 115: Chamber, 1151: Sub-chamber, 120: Battery cell assembly, 121: Battery cell group, 1210: Battery cell unit, 1211: Battery cell, 1212: First electrode post, 1213: Second electrode post, 130: Connection assembly, 131: First connection component, 132: Second connection component, 140: Signal acquisition circuit, 141: Signal acquisition harness, 150: Insulating plate, 151: First mounting groove, 152: Second mounting groove, 153: First connection hole, 154: Second connection hole, 155: Connection hole, X: First direction, Y: Second direction

Claims

1. A battery module (100), It includes a mounting frame (110), a battery cell assembly (120), a connection assembly (130), a signal acquisition circuit (140), and an insulating plate (150), The battery cell assembly (120) includes two battery cell groups (121) distributed within the mounting frame (110) along a first direction (X), the battery cell groups (121) include a plurality of battery cell units (1210) sequentially distributed along a second direction (Y), the battery cell units (1210) include two battery cells (1211) sequentially distributed along the second direction (Y), the battery cells (1211) include a first electrode column (1212) and a second electrode column (1213) distributed along the first direction (X), the first electrode columns (1212) of two adjacent battery cells (1211) distributed along the first direction (X) are close to each other, and the first direction (X) and the second direction (Y) form an angle. The connection assembly (130) includes a plurality of first connecting parts (131) and a plurality of second connecting parts (132), wherein the first electrode posts (1212) of two adjacent battery cells (1211) distributed along the first direction (X) are connected via the first connecting parts (131), and the second electrode posts (1213) of two battery cells (1211) of the battery cell unit (1210) are connected via the second connecting parts (132). The signal acquisition circuit (140) extends along the second direction (Y), and the plurality of first connecting components (131) and the plurality of second connecting components (132) are electrically connected to the signal acquisition circuit (140), and the signal acquisition circuit (140) includes two signal acquisition harnesses (141) extending along the second direction (Y), the two signal acquisition harnesses (141) are distributed on both sides of the first connecting component (131) along the first direction (X), and the signal acquisition harnesses (141) are electrically connected to the second connecting components (132) and some of the first connecting components (131) along both sides of the first direction (X), The insulating plate (150) covers the battery cell assembly (120), the connection assembly (130) and the signal acquisition circuit (140) are provided on the side of the insulating plate (150) away from the battery cell assembly (120), the insulating plate (150) has a plurality of connection holes (155), some of the connection holes (155) are provided for electrical connection between the first connection component (131) and the first electrode column (1212), or some of the connection holes (155) are provided for electrical connection between the second connection component (132) and the second electrode column (1213), The connection hole (155) includes a first connection hole (153) and a second connection hole (154), and a first mounting groove (151) and a second mounting groove (152) are provided on the side of the insulating plate (150) away from the battery cell assembly (120), the first connection hole (153) is provided at the bottom of the first mounting groove (151), the first connecting component (131) is mounted in the first mounting groove (151) and electrically connected to the first electrode column (1212) through the first connection hole (153), the second connection hole (154) is provided at the bottom of the second mounting groove (152), the second connecting component (132) is mounted in the second mounting groove (152) and electrically connected to the second electrode column (1213) through the second connection hole (154). A battery module characterized by the following features.

2. The polarity of the first electrode column (1212) of two adjacent battery cells (1211) distributed along the first direction (X) is opposite, and the polarity of the second electrode column (1213) of two battery cells (1211) of the battery cell unit (1210) is opposite. The battery module according to feature 1.

3. One of the battery cell groups (121) includes two independent battery cells (1211), and the two independent battery cells (1211) are located on both sides of the plurality of battery cell units (1210) along the second direction (Y), or Each of the two battery cell groups (121) includes an independent battery cell (1211), the independent battery cell (1211) of one battery cell group (121) is located on one side of the plurality of battery cell units (1210) along the second direction (Y), and the independent battery cell (1211) of the other battery cell group (121) is located on the other side of the plurality of battery cell units (1210) along the second direction (Y). The battery module according to feature 2.

4. Some of the plurality of first connecting components (131) are electrically connected to one signal acquisition harness (141), and other of the plurality of first connecting components (131) are electrically connected to another signal acquisition harness (141). The battery module according to feature 1.

5. Among the plurality of first connecting components (131), those first connecting components (131) provided at intervals are electrically connected to one of the signal acquisition harnesses (141), and other first connecting components (131) of the plurality of first connecting components (131) are electrically connected to another signal acquisition harness (141). The battery module according to feature 4.

6. The first connecting component (131) and the second connecting component (132) are provided in the shape of a plate or a piece. A battery module according to any one of claims 1 to 5, characterized by the above.

7. The mounting frame (110) includes two end plates (111) facing each other along the second direction (Y) and two side plates (112) facing each other along the first direction (X), wherein both ends of the end plates (111) are connected to the ends of the two side plates (112) in a one-to-one correspondence and surround each other to form a chamber (115). The mounting frame (110) further includes a connecting plate (113) extending along the second direction (Y), and both ends of the connecting plate (113) along the second direction (Y) are connected to the two end plates (111), thereby dividing the chamber (115) into two sub-chambers (1151), and the battery cell group (121) is provided in the two sub-chambers (1151) in a one-to-one correspondence. A battery module according to any one of claims 1 to 5, characterized by the above.

8. An adhesive layer (114) is provided on the side surface of the connecting plate (113) facing the sub-chamber (1151), and the adhesive layer (114) is bonded to the side surface of the battery cell (1211). The battery module according to feature 7.

9. The connecting plate (113) is welded to the end plate (111). The battery module according to feature 7.

10. A through hole (1111) is provided in the end plate (111), the through hole (1111) penetrates the end plate (111) along the second direction (Y), and the end of the connecting plate (113) along the second direction (Y) protrudes through the through hole (1111) and toward the side of the end plate (111) away from the chamber (115). The battery module according to feature 9.

11. It is a battery pack, Including a case and a battery module (100), The battery module (100) is the battery module (100) described in any one of claims 1 to 5, and the battery module (100) is provided inside the case. A battery pack characterized by the following features.

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