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] This application claims priority from a Chinese patent application filed with the China Patent Office on April 2, 2024, bearing application number 202420680874.5, and an international application filed with the China Patent Office on October 17, 2024, bearing application number PCT / CN2024 / 125558, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD This application relates to the field of battery technology, and in particular to battery modules and battery packs. [Background technology]

[0002] In related technology, multiple rows of battery cells of a battery module are mounted within a mounting frame, and the battery cells generate a relatively large expansion force in the direction of the battery cell arrangement during the charging and discharging process. This expansion force acts on the end plates of the mounting frame on both sides in the direction of the battery cell arrangement, pushing and bending the end plates on both sides of the mounting frame, causing the battery cells to displace in the direction of the battery cell arrangement. Summary of the Invention [Problem to be solved by the invention]

[0003] However, because the deformation resistance capacity of the center sections of the end plates on both sides of the mounting frame is relatively weak, the center sections of the end plates on both sides of the mounting frame will undergo greater bending deformation under the action of expansion forces, causing relatively large displacements in the electrode posts corresponding to the center positions of the battery cells and the end plates on both sides of the mounting frame.Furthermore, these electrode posts will be subjected to relatively large shear forces or torques, which can easily lead to situations where the electrode posts of the battery cells will be damaged. [Means for solving the problem]

[0004] The present application provides a battery module including a mounting frame, a battery cell assembly, and a connection assembly, wherein the battery cell assembly includes two battery cell groups distributed within the mounting frame along a first direction, the battery cell groups including a plurality of battery cell units sequentially distributed along a second direction, the battery cell units including two battery cells sequentially distributed along the second direction, the battery cells including first and second electrode pillars distributed along the first direction, the first electrode pillars of two adjacent battery cells distributed along the first direction being adjacent to each other and forming an angle between the first direction and the second direction, the connection assembly including a plurality of first connection parts and a plurality of second connection parts, the first electrode pillars of two adjacent battery cells distributed along the first direction being connected via the first connection part, and the second electrode pillars of two battery cells of the battery cell unit being connected via the second connection part.

[0005] The present application provides a battery pack, which includes a case and a battery module, the battery module being the above-mentioned battery module, and the battery module being disposed in 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 group includes a plurality of battery cell units distributed sequentially along a second direction, the battery cell unit includes two battery cells distributed sequentially along the second direction, the battery cells include first electrode pillars and second electrode pillars distributed along the first direction, the first electrode pillars of two adjacent battery cells distributed along the first direction are close to each other and form an angle between the first direction and the second direction, the connection assembly includes a plurality of first connection parts and a plurality of second connection parts, the first electrode pillars of two adjacent battery cells distributed along the first direction are connected via the first connection parts, and the second electrode pillars of the two battery cells of the battery cell unit are connected via the second connection parts. [Effects of the Invention]

[0006] The battery module provided in the present application connects the first electrode pillars of two adjacent battery cells distributed along a first direction via a first connection part and connects the second electrode pillars of two battery cells of a battery cell unit via a second connection part, thereby connecting the multiple battery cells of the battery cell assembly in series or parallel via the multiple first connection parts and second connection parts of the connection assembly. Furthermore, since the first electrode pillars of two adjacent battery cells distributed along the first direction have essentially the same amount of expansion displacement in the second direction, after connecting the first electrode pillars of two adjacent battery cells distributed along the first direction via the first connection part, the first electrode pillars of the two adjacent battery cells distributed along the first direction synchronously displace the first connection parts connected to the first electrode pillars, thereby maintaining an essentially constant distance between the two first electrode pillars connected to the first connection parts and also maintaining an essentially constant acting force between the first connection part and the two first electrode pillars. Therefore, it is possible to avoid the problem of the first electrode pillar being damaged due to a relatively large shear force or torque being applied to the first electrode pillar after the battery cell expands and causes displacement in the first electrode pillar.

[0007] The battery pack provided in the present application connects the first electrode poles of two adjacent battery cells distributed along a first direction of a battery module via a first connecting part, and connects the second electrode poles of two battery cells of a battery cell unit via a second connecting part, so that after the battery cells expand, the first electrode poles of two adjacent battery cells distributed along the first direction synchronously displace the first connecting part connected to the first electrode poles, thereby maintaining a substantially constant distance between the two first electrode poles connected to the first connecting part and a substantially constant acting force between the first connecting part and the two first electrode poles. This avoids the problem of the first electrode poles being subjected to a relatively large shear force or torque after the battery cells expand and cause the first electrode poles to displace, thereby improving the stability of the battery pack. [Brief explanation of the drawings]

[0008] [Figure 1]1 is an exploded structural view of an embodiment of a battery module provided by an embodiment of the present application; [Figure 2] 1 is a structural diagram of an embodiment of a battery cell assembly, a connection assembly, and a signal collection circuit provided by an embodiment of the present application; [Figure 3] 1 is a structural diagram of an embodiment of a mounting frame, a battery cell assembly, a connection assembly, and a signal collection circuit of a battery module provided by an embodiment of the present application; [Figure 4] 1 is an exploded structural view of an embodiment of a mounting frame provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0009] A battery module includes multiple battery cells mounted within a mounting frame, and the battery cells undergo expansion and deformation during charging and discharging. 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 arrangement of the battery cells, pushing and bending both sides of the mounting frame, causing the battery cells to displace in the direction of the arrangement of the battery cells. The battery cells are correspondingly displaced in their arrangement direction.

[0010] Because 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, the other structures of the mounting frame apply tensile forces to the both ends of the mounting frame, limiting the amount of bending deformation at the both ends of the mounting frame, thereby strengthening the deformation resistance of the both ends of the mounting frame, while the deformation resistance of the center portions on both sides of the mounting frame is relatively weak. When the both sides of the mounting frame are pressed by the expansion force of the battery cells, the center portions on both sides of the mounting frame undergo greater bending deformation than the ends, resulting in greater displacement at the positions corresponding to the battery cells and the center portions on both sides of the mounting frame than at the positions corresponding to the battery cells and the both ends of the mounting frame.

[0011] In particular, when a battery module includes two rows of battery cells arranged in parallel, the space between the two rows of parallel battery cells corresponds to the center of both sides of the mounting frame, so when the battery cells expand, the adjacent ends of the two rows of battery cells will experience a relatively large displacement in the direction of the battery cell arrangement, and the closer they are to the sides of the mounting frame, the greater the displacement of the ends corresponding to the centers of both sides of the battery cells and the mounting frame. Correspondingly, the displacement of the electrode posts located at the ends corresponding to the centers of both sides of the battery cells and the mounting frame also increases, and the distance between the electrode posts at the ends corresponding to the centers of both sides of the mounting frame in the direction of the battery cell arrangement also increases.

[0012] In the related art, 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 in the arrangement direction of the multiple battery cells and two side plates extending in the arrangement direction of the multiple battery cells. Both ends of the two end plates are connected in a one-to-one correspondence via the side plates, and form a chamber surrounding the two end plates to mount the multiple battery cells. When the battery cells expand and apply an expansion force to the end plates, the ends of the end plates are subjected to a tensile force from the side plates, while the center of the end plate is not subjected to the tensile force from the side plates. Therefore, the center of the end plate undergoes a greater bending deformation than the ends of the end plate, resulting in a greater displacement at the position corresponding to the battery cell and the center of the end plate.

[0013] In the related art, two adjacent battery cells in the arrangement direction of the battery cells are connected to the electrode posts at one end corresponding to the center of both sides of the mounting frame via a connection sheet, and as the distance between the two electrode posts connected to the connection sheet increases, the connection sheet applies a relatively large shear force or torque to the electrode posts, easily causing a situation in which the electrode posts of the battery cells are damaged.

[0014] To avoid the above problems, an embodiment of the present application provides a battery module.

[0015] 1 is an exploded structural view of one embodiment of a battery module provided by an embodiment of the present application. As shown in FIG. 1, the battery module 100 includes a mounting frame 110, a battery cell assembly 120, and a connection assembly 130. The battery cell assembly 120 includes a plurality of battery cells 1211 mounted in the mounting frame 110. The battery cells 1211 include first electrode poles 1212 and second electrode poles 1213. The connection assembly 130 is electrically connected to the first electrode poles 1212 and second electrode poles 1213 of the plurality of battery cells 1211 of the battery cell assembly 120, thereby realizing a series or parallel connection between the plurality of battery cells 1211 of the battery cell assembly 120.

[0016] 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 arranged within the mounting frame 110, and the two rows of battery cells 1211 are distributed along the first direction X, with the battery cells 1211 in each row being 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 an acute angle.

[0017] 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 plurality of battery cell units 1210 are distributed along the second direction Y. The battery cell assembly 120 may also include three, four, or more battery cell groups 121, and the plurality of battery cell groups 121 are sequentially distributed within the mounting frame 110 along the first direction X.

[0018] Here, the battery cell 1211 includes first electrode pillars 1212 and second electrode pillars 1213 distributed along the first direction X. As a result, the thickness direction of the battery cell 1211 is parallel to the second direction Y. When the multiple battery cells 1211 expand, the multiple battery cells 1211 are displaced mainly along the second direction Y, and further, the first electrode pillars 1212 and second electrode pillars 1213 of the battery cell 1211 are displaced along the second direction Y.

[0019] The polarities of the first electrode pole 1212 and the second electrode pole 1213 are opposite, and the first electrode pole 1212 may be a positive pole and the second electrode pole 1213 may be a negative pole, or the first electrode pole 1212 may be a negative pole and the second electrode pole 1213 may be a positive pole. Specifically, this can be determined based on the wiring method of the multiple battery cells 1211 of the battery module 100.

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

[0021] Here, the first electrode pillars 1212 of the battery cells 1211 correspond to the center portions on both sides of the mounting frame 110, and the second electrode pillars 1213 of the battery cells 1211 correspond to the end portions on both sides of the mounting frame 110. After the battery cells 1211 expand, the displacements caused by the first electrode pillars 1212 of two adjacent battery cells 1211 distributed along the first direction X are equal, and the displacement caused by the battery cells 1211 in the second direction Y is greater than the displacement caused by the second electrode pillars 1213 in the second direction Y. At the same time, the displacements caused by the first electrode pillars 1212 of the battery cells 1211 along both sides of the mounting frame 110 in the second direction Y become greater, and the distance between the first electrode pillars 1212 of the two adjacent battery cells 1211 along the second direction Y increases.

[0022] When the first electrode pillars 1212 of two adjacent battery cells 1211 along the second direction Y are connected via a connecting part, the first electrode pillars 1212 of the two adjacent battery cells 1211 along the second direction Y may be subjected to a large shear force or torque, which may further damage the first electrode pillars 1212 of the battery cells 1211.

[0023] To avoid the above problems, in some embodiments, the connection assembly 130 includes a plurality of first connection parts 131 and a plurality of second connection parts 132, and the first electrode pillars 1212 of two adjacent battery cells 1211 distributed along the first direction X are connected via the first connection parts 131, and the second electrode pillars 1213 of two battery cells 1211 of the battery cell unit 1210 are connected via the second connection parts 132.

[0024] As a result, the plurality of battery cells 1211 of the battery cell assembly 120 can be connected in series or parallel using the plurality of first connection parts 131 and second connection parts 132 of the connection assembly 130. Furthermore, the first electrode pillars 1212 of two adjacent battery cells 1211 distributed along the first direction X have essentially the same amount of expansion displacement in the second direction Y. Therefore, after the first electrode pillars 1212 of the two adjacent battery cells 1211 distributed along the first direction X are connected via the first connection part 131, the first electrode pillars 1212 of the two adjacent battery cells 1211 distributed along the first direction X can synchronously displace the first connection part 131 connected to the first electrode pillars 1212. In other words, when the battery cell 1211 expands, the distance between the two first electrode pillars 1212 connected to the first connection part 131 is kept essentially constant, and the force acting between the first connection part 121 and the two first electrode pillars 1212 is also kept essentially constant. Therefore, it is possible to avoid the problem of the first electrode pillar 1212 being damaged due to a relatively large shear force or torque being applied to the first electrode pillar 1212 after the battery cell 1211 expands and causes displacement in the first electrode pillar 1212.

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

[0026] In some embodiments, the polarities of the first electrode pillars 1212 of two adjacent battery cells 1211 distributed along the first direction X may be opposite. Thus, the two adjacent battery cells 1211 distributed along the first direction X may be connected in series via the first connection part 131. Here, one of the two first electrode pillars 1212 connected to the first connection part 131 is a positive electrode pillar and the other first electrode pillar 1212 is a negative electrode pillar, thereby connecting the two battery cells 1211 distributed in the first direction X in series via the first connection part 131.

[0027] Similarly, the polarities of the second electrode poles 1213 of the two battery cells 1211 of the battery cell unit 1210 can be reversed. This allows the two battery cells of the battery cell unit 1210 to be connected in series via the second connection part 132. Here, one of the two second electrode poles 1213 connected to the second connection part 132 is a positive electrode pole and the other second electrode pole 1213 is a negative electrode pole, thereby connecting the second electrode poles 1213 of the two battery cells 1211 of the battery cell unit 1210 in series via the second connection part 132.

[0028] In some preferred embodiments, the polarities of the first electrode poles 1212 of two adjacent battery cells 1211 distributed along the first direction X may be opposite, and the polarities of the second electrode poles 1213 of the two battery cells 1211 of a battery cell unit 1210 may be opposite. The first electrode poles 1212 of two adjacent battery cells 1211 of two battery cell units 1210 of one battery cell group 121 are connected in a one-to-one correspondence with the first electrode poles 1212 of two battery cells 1211 of one battery cell unit 1210 of another battery cell group 121 via two first connecting parts 131, thereby realizing that the multiple first connecting parts 131 and the multiple second connecting parts 132 sequentially connect the multiple battery cells 1211 of the two battery cell groups 121 in series in the direction of the dashed line in FIG. 3 .

[0029] 1 to 3, the battery module 100 further includes a signal collecting circuit 140 extending along the second direction Y, and the plurality of first connection parts 131 and the plurality of second connection parts 132 are each electrically connected to the signal collecting circuit 140. This allows voltage signals of the electrode poles 1212 of each battery cell 1211 to be collected via the signal collecting circuit 140.

[0030] In some embodiments, the signal collection circuit 140 includes two signal collection harnesses 141 extending along the second direction Y, the two signal collection harnesses 141 being distributed on both sides of the first connection component 131 along the first direction X, and the signal collection harness 141 being electrically connected to some of the first connection components 131 and the second connection components 132 located on both sides along the first direction X.

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

[0032] Specifically, first connection parts 131 that are spaced apart among the plurality of first connection parts 131 are electrically connected to one signal collection harness 141, and other first connection parts 131 of the plurality of first connection parts 131 are electrically connected to another signal collection harness 141. Of course, adjacent first connection parts 131 among the plurality of first connection parts 131 may be electrically connected to one signal collection harness 141, and some other first connection parts 131 of the plurality of first connection parts 131 may be electrically connected to another signal collection harness 141.

[0033] 1 , the battery module 100 further includes an insulating plate 150 covering the battery cell assemblies 120. The connection assemblies 130 and the signal collecting circuit 140 are disposed on the side of the insulating plate 150 away from the battery cell assemblies 120, thereby isolating the battery cells 1211 of the battery cell module 120 from the connection assemblies 130 and the signal collecting circuit 140 and preventing the connection assemblies 130 or the signal collecting circuit 140 from shorting out the battery cells 1211 of the battery cell module 120. The insulating plate 150 has a plurality of connection holes 155, some of which are provided for electrical connection between the first connection component 131 and the first electrode pillar 1212, and some of which are provided for electrical connection between the second connection component 132 and the second electrode pillar 1213. The plurality of connection holes 155 include a first connection hole 153 and a second connection hole 154 disposed in the insulating plate 150. The first connection hole 153 is provided for electrical connection between the first connection part 131 and the first electrode pillar 1212 , and the second connection hole 154 is provided for electrical connection between the second connection part 132 and the second electrode pillar 1213 .

[0034] Specifically, the first connection part 131 and the second connection part 132 are plate-shaped or strip-shaped. A first mounting groove 151 for mounting the first connection part 131 is formed on the insulating plate 150 on the side facing away from the battery cell assembly 120, and a first connection hole 153 is formed at the bottom of the first mounting groove 151. The first connection part 131 is mounted in the first mounting groove 151 and is electrically connected to the first electrode post 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 for mounting the second connection part 132 is formed on the side of the insulating plate 150 facing away from the battery cell assembly 120, and a second connection hole 154 is formed at the bottom of the second mounting groove 152. The second connection part 132 is mounted in the second mounting groove 152 and is electrically connected to the second electrode pole 1213 of the battery cell 1211 through the second connection hole 154 at the bottom of the second mounting groove 152. The first connection part 131 and the second connection part 132 may be fixedly connected to the electrode pole 1212 of the battery cell 1211 by welding.

[0035] 1 , the mounting frame 110 includes two end plates 111 arranged opposite each other along the second direction Y and two side plates 112 arranged opposite each other along the first direction X, and 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 battery cell assembly 120 is provided in the chamber 115 of the mounting frame 110.

[0036] 1 and 4, 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 respectively connected to two end plates 111, thereby dividing the chamber 115 into two sub-chambers 1151. The battery cell groups 121 are arranged in one-to-one correspondence within the two sub-chambers 1151.

[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 that are configured to accommodate the battery cell groups 121, the connecting plate 113 can apply a tensile force to the middle portion of the two end plates 111. When the multiple battery cells 1211 of the battery cell group 121 expand and cause the central portion of the end plate 111 to be displaced in the second direction Y, the connecting plate 113 can apply a tensile force to the central portion of the end plate 111, thereby limiting the amount of deformation of the central portion of the end plate 111. Furthermore, by limiting the amount of displacement in the second direction Y of the first electrode posts 1212 of two adjacent battery cells 1211 distributed along the first direction X, it can be understood that the large shear force and torque caused by the displacement of the first electrode posts 1212 of the battery cells 1211 can be further reduced.

[0038] 1 and 4 , in some embodiments, an adhesive layer 114 is provided on a side surface of the connection plate 113 facing the sub-chamber 1151, and the adhesive layer 114 is bonded to a side surface of the battery cell 1211. In this way, when the multiple battery cells 1211 of the battery cell group 121 expand, the connection 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 a certain extent the amount of displacement of the first electrode poles 1212 of the battery cells 1211 in the second direction Y.

[0039] Specifically, an adhesive layer 114 is provided on both sides of the connecting plate 113 facing the two sub-chambers 1151, and both sides of the adhesive layer 113 are adhered to the sides of 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, and allowing the connecting plate 113 to apply a greater tensile force to the central portion of the end plate 111, further enhancing the effect of limiting the deformation amount of the central portion of the end plate 111.

[0041] 1 and 4, a through hole 1111 is formed in the end plate 111, and the through hole 1111 penetrates the end plate 111 in the second direction Y. The end of the connecting plate 113 along the second direction Y protrudes through the through hole 1111 toward the side of the end plate 111 that faces away from the chamber 115. This allows the end plate 111 and the connecting plate 113 to be welded together from the side of the end plate 111 that faces 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 a tensile force to the end plate 111 and only the deformation of the center of the end plate 111 is reduced.

[0042] The embodiments of the present application further provide a battery pack, which includes a battery module, and the specific structure of the battery module is referred to in the above embodiments. This battery pack adopts all the technical solutions of the above embodiments, and therefore has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0043] Here, the battery pack includes a case and a battery module, and the battery module may be the battery module in any of the above embodiments, and the battery module is disposed in 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 part, 132: second connection part, 140: signal collection circuit, 141: signal collection 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), The battery includes a mounting frame (110), a battery cell assembly (120), and a connection assembly (130); 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 pillar (1212) and a second electrode pillar (1213) distributed along the first direction (X), the first electrode pillars (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 connection parts (131) and a plurality of second connection parts (132), and the first electrode pillars (1212) of two adjacent battery cells (1211) distributed along the first direction (X) are connected via the first connection parts (131), and the second electrode pillars (1213) of two battery cells (1211) of the battery cell unit (1210) are connected via the second connection parts (132). A battery module characterized by:

2. The polarities of the first electrode poles (1212) of two adjacent battery cells (1211) distributed along the first direction (X) are opposite, and the polarities of the second electrode poles (1213) of the two battery cells (1211) of the battery cell unit (1210) are opposite. The battery module according to claim 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 one 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 claim 2 .

4. The device further includes a signal acquisition circuit (140) extending along the second direction (Y), and the plurality of first connection parts (131) and the plurality of second connection parts (132) are electrically connected to the signal acquisition circuit (140), respectively. The battery module according to claim 1 .

5. The signal collection circuit (140) includes two signal collection harnesses (141) extending along the second direction (Y), the two signal collection harnesses (141) being distributed on both sides of the first connection part (131) along the first direction (X), and the signal collection harness (141) being electrically connected to the second connection part (132) and some of the first connection parts (131) along both sides of the first direction (X). The battery module according to claim 4 .

6. Some of the first connection parts (131) of the plurality of first connection parts (131) are electrically connected to one of the signal collection harnesses (141), and other some of the first connection parts (131) of the plurality of first connection parts (131) are electrically connected to another of the signal collection harnesses (141). The battery module according to claim 5 .

7. The first connection parts (131) spaced apart among the plurality of first connection parts (131) are electrically connected to one of the signal collection harnesses (141), and other first connection parts (131) of the plurality of first connection parts (131) are electrically connected to another one of the signal collection harnesses (141). The battery module according to claim 6 .

8. The battery cell assembly (120) further includes an insulating plate (150) covering the battery cell assembly (120), the connection assembly (130) and the signal collection circuit (140) being disposed on the side of the insulating plate (150) away from the battery cell assembly (120), and the insulating plate (150) has a plurality of connection holes (155), some of which are provided for electrical connection between the first connection part (131) and the first electrode pole (1212), or some of which are provided for electrical connection between the second connection part (132) and the second electrode pole (1213). The battery module according to claim 5 .

9. 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 formed on the side of the insulating plate (150) away from the battery cell assembly (120), the first connection hole (153) is formed at the bottom of the first mounting groove (151), the first connection part (131) is mounted in the first mounting groove (151) and is electrically connected to the first electrode post (1212) through the first connection hole (153), and the second connection hole (154) is formed at the bottom of the second mounting groove (152), and the second connection part (132) is mounted in the second mounting groove (152) and is electrically connected to the second electrode post (1213) through the second connection hole (154). The battery module according to claim 8 .

10. The first connecting part (131) and the second connecting part (132) are provided in a plate-like or strip-like shape.

10. The battery module according to claim 1, wherein the battery module is a battery module having a plurality of electrodes.

11. The mounting frame (110) includes two end plates (111) arranged opposite to each other along the second direction (Y) and two side plates (112) arranged opposite to each other along the first direction (X), and both ends of the end plates (111) are connected to end portions 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), respectively, thereby dividing the chamber (115) into two sub-chambers (1151), and the battery cell groups (121) are arranged in one-to-one correspondence within the two sub-chambers (1151).

10. The battery module according to claim 1, wherein the battery module is a battery module having a plurality of electrodes.

12. An adhesive layer (114) is provided on the side of the connecting plate (113) facing the sub-chamber (1151), and the adhesive layer (114) is bonded to the side of the battery cell (1211). The battery module according to claim 11 .

13. The connecting plate (113) is welded to the end plate (111). The battery module according to claim 11 .

14. The end plate (111) has a through hole (1111), which 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). The battery module according to claim 13 .

15. A battery pack, A battery module (100) is included. The battery module (100) is the battery module (100) according to any one of claims 1 to 9, and the battery module (100) is provided in the case. A battery pack characterized by:

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