Battery module and battery pack

Abstract

The utility model discloses a battery module and a battery pack. The plurality of battery cell assemblies are sequentially stacked in the height direction of the main body, each battery cell assembly comprises a first battery cell and a second battery cell which are sequentially arranged in the length direction of the main body, and each first battery cell and each second battery cell comprise a positive pole lug and a negative pole lug. The anode tab of one of the first battery cell and the second battery cell at the topmost end of the main body is connected with an anode leading-out end, and the cathode tab of the other one is connected with a cathode leading-out end. In the height direction of the main body, every two adjacent first battery cells are connected in series or in parallel through a first busbar, every two adjacent second battery cells are connected in series or in parallel through a second busbar, and the first battery cell and the second battery cell of the battery cell assembly located at the bottommost end of the main body are connected in series or in parallel through a bottom busbar. According to the invention, the problem of short circuit risk existing in a connection mode that two leading-out electrodes of the battery module are led to the same side of the battery module by adopting a long cable or a long aluminum row is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of soft package battery, in particular to a battery module and a battery pack. BACKGROUND

[0002] The battery module realizes the electrical connection between the battery monomers through multiple busbars. The two lead-out poles of the battery module connected with the external power supply or load are usually arranged at opposite ends of the battery module. When multiple battery monomers are stacked and connected, one lead-out pole is above the battery module, and the other lead-out pole is below the battery module. This layout brings many inconveniences to the subsequent connection work of the battery module.

[0003] The prior art uses a long cable or a long aluminum bar to lead the lead-out pole below to the same horizontal height as the lead-out pole above, so as to facilitate the subsequent connection operation of the battery module. However, when the long cable or the long aluminum bar is connected, the long cable or the long aluminum bar needs to cross over the other busbars above the battery module, which has the risk of short circuit between the long cable or the long aluminum bar and the other busbars. Moreover, the long cable and the long aluminum bar need additional wiring and fixing measures during installation, which increases the complexity and workload of installation, makes the wiring of the battery module complex and cumbersome, and reduces the overall aesthetics and compactness of the battery module. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the present application is to provide a battery module and a battery pack to solve the problem of short circuit risk in the prior art connection mode of leading the two lead-out poles of the battery module to the same side of the battery module by using a long cable or a long aluminum bar.

[0005] According to one aspect of the present application, a battery module is provided, comprising:

[0006] a main body comprising multiple cell assemblies, the multiple cell assemblies are sequentially stacked along the height direction of the main body, and each cell assembly comprises first cells and second cells arranged sequentially along the length direction of the main body, and each first cell and each second cell comprises a positive electrode lug and a negative electrode lug;

[0007] wherein the positive electrode lug of one of the first cell and the second cell at the top end of the main body is connected with a positive lead-out end, and the negative electrode lug of the other one is connected with a negative lead-out end;

[0008] along the height direction of the main body, two adjacent first cells are connected in series or parallel through a first busbar, two adjacent second cells are connected in series or parallel through a second busbar, and the first cell and the second cell of the cell assembly at the bottom end of the main body are connected in series or parallel with each other through a bottom busbar.

[0009] Further, one of the positive electrode tabs of the first and second battery cells of the battery cell assembly at the bottom end of the main body is electrically connected to one end of the bottom bus bar, and the other of the negative electrode tabs is electrically connected to the other end of the bottom bus bar.

[0010] Further, on each of the battery cell assemblies, the positive and negative electrode tabs of the first battery cell are located on the side of the first battery cell away from the second battery cell, and the positive and negative electrode tabs of the second battery cell are located on the side of the second battery cell away from the first battery cell along the length direction of the main body.

[0011] The bottom bus bar has a U-shaped structure, and the U-shaped structure surrounds the battery cell assembly at the bottom end of the main body.

[0012] Further, the battery cell assembly further comprises:

[0013] A support frame, the first and second battery cells are sequentially mounted on the support frame along the length direction of the main body, and the support frame is provided with a positioning component, which is used for fixing the first and second battery cells to predetermined positions on the support frame.

[0014] Further, the positioning component comprises:

[0015] A plurality of positioning structures, the positioning structures are fixed to opposite sides of the support frame along the length direction of the main body, the length of the positioning structure extends along the width direction of the support frame, the positioning structure close to the first battery cell abuts against the first battery cell, and the positioning structure close to the second battery cell abuts against the second battery cell.

[0016] A plurality of positioning columns, the positioning columns are fixed to the support frame and located between the first and second battery cells, and the positioning columns abut against the first and second battery cells along the length direction of the main body.

[0017] Further, at one end of the length of the main body, the positioning structures each comprise at least two, and each of the positioning structures comprises a conductive strip and an insulating positioning block, the conductive strip extends along the width direction of the main body, and the two ends of the conductive strip in the length direction are provided with the insulating positioning blocks, the conductive strip of at least one of the positioning structures is electrically connected to the positive electrode tab, and the conductive strip of at least another of the positioning structures is electrically connected to the negative electrode tab.

[0018] Further, at least one of the insulating positioning blocks is provided through the support frame along the height direction of the main body, one end of the at least one of the insulating positioning blocks is provided with a protruding column, and the other end is provided with a groove matched with the protruding column, the protruding column of a first insulating positioning block among two adjacent insulating positioning blocks is embedded in the groove of a second insulating positioning block.

[0019] Further, opposite sides of the support frame along the width direction of the main body are provided with bent flanges, and opposite sides of the first battery cell along the width direction of the main body and opposite sides of the second battery cell along the width direction of the main body are in abutment with the bent flanges.

[0020] Further, the battery cell assembly further comprises:

[0021] A thermal insulation pad is installed on a side of the first battery cell and the second battery cell away from the support frame along the height direction of the main body, and the thermal insulation pad at least partially covers the first battery cell and the second battery cell.

[0022] In another aspect, the application also provides a battery pack comprising the battery module.

[0023] In the application, the battery cell assembly is provided with the first battery cell and the second battery cell arranged in sequence, the first battery cell on each battery cell assembly is electrically connected by the first bus bar, the first battery cell on each battery cell assembly is electrically connected by the second bus bar, and the first battery cell and the second battery cell of the battery cell assembly at the bottom end of the main body are electrically connected by the bottom bus bar, so that the positive and negative output ends of the main body can be naturally connected to the top end of the main body without using long cables or long aluminum bars, effectively avoiding the risk of short circuit of the long cables or long aluminum bars with the first bus bar, the second bus bar and the bottom bus bar, and improving the safety and stability of the battery module. The application does not need to install additional fixing parts for fixing long cables or long aluminum bars, reduces the installation cost of the battery module, simplifies the installation operation of the battery module, and is conducive to improving the installation efficiency of the battery module. In addition, the application arranges a plurality of battery cell assemblies in sequence, improves the compactness and aesthetics of the battery module. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings described herein are used to provide further understanding of the application, and form a part of the application. The illustrative embodiments of the application and their descriptions serve to explain the application, and do not constitute an improper limitation on the application. In the drawings:

[0025] Figure 1 Structure diagram of the battery module disclosed in the application (one);

[0026] Figure 2Structure diagram of the battery module disclosed in the present application (two);

[0027] Figure 3 Structure diagram of the battery cell assembly disclosed in the present application;

[0028] Figure 4 Disassembly diagram of the battery cell assembly disclosed in the present application;

[0029] Figure 5 Structure diagram of the support frame disclosed in the present application (one);

[0030] Figure 6 Structure diagram of the support frame disclosed in the present application (two).

[0031] Among them, the above-mentioned drawings include the following reference signs:

[0032] 10, main body; 11, battery cell assembly; 111, first battery cell; 1111, first busbar; 112, second battery cell; 1121, second busbar; 1122, bottom busbar; 113, positive electrode tab; 114, negative electrode tab; 115, support frame; 1150, positioning component; 1151, positioning structure; 11511, conductive strip; 11512, insulating positioning block; 11513, protruding column; 11514, groove; 1152, positioning column; 1153, bent flange; 116, heat insulation pad; 117, foam strip; 12, positive electrode lead-out end; 13, negative electrode lead-out end; 20, top cover plate; 30, bottom cover plate. DETAILED DESCRIPTION

[0033] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a presence of the features, steps, operations, devices, components and / or combinations thereof.

[0035] The foregoing is considered as illustrative only of the principles of the application. Other variations and modifications can be made to the embodiments disclosed in this document, by persons with ordinary skill in the art, without departing from the scope of the present application, as defined in the appended claims. Furthermore, the scope of the present application is not intended to be limited to the particular embodiments disclosed in this document, but is intended to include all embodiments falling within the scope of the appended claims, even if such embodiments are not specifically disclosed in this document. Therefore, the scope of the present application is defined by the appended claims rather than by the foregoing description. All numbers expressing quantities of components, reaction conditions, and so forth used in the specification and claims are understood as being modified in all instances by the term "about". Accordingly, unless indicated to the contrary, the numerical values set forth in the specification and claims are approximations. The numerical values set forth in the specification and claims have been determined without considering inherent variation in materials, methods, and apparatuses. It will be further understood that any listed range of values should be interpreted as being inclusive of the beginning and end values, and the recitation of values and criteria are not to be interpreted as an exclusion of other values or criteria. Additionally, the terms in the claims have their plain, ordinary meaning. The singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. The terms "comprises", "comprising", "includes", "including", and the like, means "including but not limited to". The meaning of "by weight" or "wt%" is based on the total weight of the composition, formulation, or mixture, unless otherwise specified. Percentages, ratios, and other units are understood to be "about" one unless otherwise specified. All publications, patent applications, patents, and other references mentioned in this document are incorporated by reference. The combination of features, processes, compositions, and / or methods disclosed in this document can not only be used in the combination described, but also can be used in other combinations dependent on the features, processes, compositions, and / or methods disclosed in this document.

[0036] As shown in Figures 1 to 6 The present application provides a battery module. The battery module includes a main body 10. The main body 10 includes a plurality of cell assemblies 11. The plurality of cell assemblies 11 are sequentially stacked along a height direction of the main body 10 (as indicated by an arrow Z in Figure 1 FIG. 1), and each cell assembly 11 includes a first cell 111 and a second cell 112 sequentially arranged along a length direction of the main body 10 (as indicated by an arrow X in Figure 1 FIG. 2). Each first cell 111 and each second cell 112 includes a positive electrode tab 113 and a negative electrode tab 114.

[0037] Among the plurality of cell assemblies 11, the positive electrode tab 113 of one of the first cell 111 and the second cell 112 at the top end of the main body 10 is connected with a positive electrode lead-out end 12, and the negative electrode tab 114 of the other one is connected with a negative electrode lead-out end 13.

[0038] Along the height direction of the main body 10, two adjacent first cells 111 are connected in series or in parallel by a first busbar 1111. Two adjacent second cells 112 are connected in series or in parallel by a second busbar 1121. The first cell 111 and the second cell 112 of the cell assembly 11 at the bottom end of the main body 10 are connected in series or in parallel by a bottom busbar 1122.

[0039] In the embodiment, the first battery cell 111 and the second battery cell 112 are arranged on the battery cell assembly 11 in sequence, the first bus bar 1111 is used to electrically connect the adjacent two first battery cells 111 on each battery cell assembly 11, and the second bus bar 1121 is used to electrically connect the adjacent two second battery cells 112 on each battery cell assembly 11. In this way, the first bus bar 1111 for connecting the first battery cell 111 and the second bus bar 1121 for connecting the second battery cell 112 do not have a cross-battery connection mode, which can effectively reduce the risk of short circuit when the battery module is connected. At the same time, the bottom bus bar 1122 is used to electrically connect the first battery cell 111 and the second battery cell 112 of the battery cell assembly 11 at the bottom end of the main body 10, so that the positive electrode lead-out end 12 and the negative electrode lead-out end 13 of the main body 10 can be naturally connected to the top end of the main body 10 without using a long cable or a long aluminum bar, effectively avoiding the risk of short circuit of the long cable or the long aluminum bar with the first bus bar 1111, the second bus bar 1121 and the bottom bus bar 1122, and improving the safety and stability of the battery module. The application also does not need to install additional fixing components for fixing the long cable or the long aluminum bar, which reduces the installation cost of the battery module, simplifies the installation operation of the battery module, and is conducive to improving the installation efficiency of the battery module. In addition, the plurality of battery cell assemblies 11 are arranged in sequence, which improves the compactness and aesthetics of the battery module.

[0040] Further, one of the positive electrode tabs 113 of the first battery cell 111 and the second battery cell 112 of the battery cell assembly 11 at the bottom end of the main body 10 is electrically connected to one end of the bottom bus bar 1122, and the other of the negative electrode tabs 114 is electrically connected to the other end of the bottom bus bar 1122. The first battery cell 111 and the second battery cell 112 of the battery cell assembly 11 at the bottom end of the main body 10 are connected in series by the bottom bus bar 1122, which can form a complete electrical connection loop at the bottom of the battery module, so that the positive electrode lead-out end 12 and the negative electrode lead-out end 13 of the loop in the battery module are located at the top end of the main body 10. Therefore, the application does not need to set a long cable or a long aluminum bar, and the positive electrode lead-out end 12 and the negative electrode lead-out end 13 of the battery module can be located on the same side of the battery module, effectively avoiding the risk of circuit short circuit caused by the long cable or the long aluminum bar crossing from the first bus bar 1111 and the second bus bar 1121, which helps to improve the safety performance of the battery module and prolong the service life of the battery module.

[0041] Specifically, in one embodiment, along the height direction of the main body 10, the first battery cells 111 on each battery cell assembly 11 are connected in series with each other through the first bus bars 1111, the second battery cells 112 on each battery cell assembly 11 are connected in series with each other through the second bus bars 1121, and the first battery cells 111 and the second battery cells 112 of the battery cell assembly 11 located at the bottom end of the main body 10 are connected in series with each other through the bottom bus bar 1122. The installation positions of the first bus bars 1111 and the second bus bars 1121 are regular, clear and orderly, which facilitates the connection operation between the battery cell assemblies 11 and reduces the installation difficulty of the battery module.

[0042] In another embodiment, along the height direction of the main body 10, the first battery cells 111 on two or more adjacent battery cell assemblies 11 are connected in parallel to form a plurality of parallel units, and the plurality of parallel units are connected in series through the first bus bars 1111. Correspondingly, the second battery cells 112 on two or more adjacent battery cell assemblies 11 are connected in parallel to form a plurality of parallel units, and the plurality of parallel units are connected in series through the second bus bars 1121, and the first battery cells 111 and the second battery cells 112 of the battery cell assembly 11 located at the bottom end of the main body 10 are connected in series with each other through the bottom bus bar 1122. The connection mode provided in this embodiment can improve the capacity of the battery module, reduce the risk of failure of the entire battery module due to the failure of a single first battery cell 111 or second battery cell 112, and greatly improve the reliability of the battery module. In addition, during discharging, two or more parallel first battery cells 111 or second battery cells 112 can share the load current, so that the discharging current on each first battery cell 111 or second battery cell 112 is relatively small. Such arrangement can reduce the heating phenomenon of the battery module during discharging and improve the discharging efficiency of the battery module.

[0043] Further, on each battery cell assembly 11, the positive and negative tabs 113 and 114 of the first battery cell 111 are located on the side of the first battery cell 111 away from the second battery cell 112 along the length direction of the main body 10. The positive and negative tabs 113 and 114 of the second battery cell 112 are located on the side of the second battery cell 112 away from the first battery cell 111. In this way, the positive and negative tabs 113 and 114 of the first battery cell 111 on each battery cell assembly 11 are located on one side of the length of the main body 10, and the positive and negative tabs 113 and 114 of the second battery cell 112 on each battery cell assembly 11 are located on the other side of the length of the main body 10. Along the height direction of the main body 10, the first bus bars 1111 between the first battery cells 111 are also located on one side of the length of the main body 10, and the second bus bars 1121 between the second battery cells 112 are also located on the other side of the length of the main body 10, making the connection operation between the positive and negative tabs 113 and 114 of the first battery cell 111 and the first bus bar 1111 and between the positive and negative tabs 113 and 114 of the second battery cell 112 and the second bus bar 1121 more convenient, facilitating efficient and accurate connection operation and improving the assembly speed of the battery module. This arrangement can also enhance the neatness of the battery module wiring, making the arrangement of the first bus bar 1111 and the second bus bar 1121 more regular, avoiding disorganized wiring of the lines, and further reducing the risk of short circuit between the lines.

[0044] The bottom bus bar 1122 has a U-shaped structure, which surrounds the battery cell assembly 11 at the bottom end of the main body 10. The bottom bus bar 1122 with a U-shaped structure can well fit the shape of the battery cell assembly 11 at the bottom end of the main body 10, making the connection part of the bottom bus bar 1122 and the battery cell assembly 11 more compact in space, reducing the axial space occupied by the bottom bus bar 1122, and reducing the volume of the battery module. In addition, the U-shaped bottom bus bar 1122 can increase the contact area between the bus bar and the battery cell assembly 11, so that the bottom bus bar 1122 can more firmly surround the battery cell assembly 11 at the bottom end, helping the battery module to achieve more firm and stable electrical connection. One end of the U-shaped bottom bus bar 1122 is electrically connected to the positive tab 113 of one of the first battery cell 111 and the second battery cell 112 of the battery cell assembly 11 at the bottom end of the main body 10, and the other end is electrically connected to the negative tab 114 of the other of the first battery cell 111 and the second battery cell 112 of the battery cell assembly 11 at the bottom end of the main body 10. The U-shaped bottom bus bar 1122 also has good heat dissipation effect, which can dissipate the heat generated by the first battery cell 111 and the second battery cell 112 from the bottom end of the main body 10, which is conducive to improving the working efficiency of the battery module.

[0045] Further, the electric cell assembly 11 further comprises a support frame 115. Along the length direction of the main body 10, the first electric cell 111 and the second electric cell 112 are sequentially mounted on the support frame 115. The support frame 115 is provided with a positioning component 1150. The positioning component 1150 is used to fix the first electric cell 111 and the second electric cell 112 to the predetermined position of the support frame 115. By providing the positioning component 1150 on the support frame 115, the first electric cell 111 and the second electric cell 112 can be accurately fixed at the predetermined position, ensuring that the first electric cell 111 and the second electric cell 112 are in the correct position, and ensuring that the first electric cell 111 and the second electric cell 112 can stably charge and discharge. The positioning component 1150 can also effectively prevent the first electric cell 111 and the second electric cell 112 from moving on the support frame 115, effectively reducing the risk of mutual collision, loose or broken tabs, etc. between the first electric cell 111 and the second electric cell 112, and improving the reliability and service life of the battery module. The positioning component 1150 can also simplify the assembly process of the first electric cell 111 and the second electric cell 112. By providing the positioning component 1150 on the support frame 115 in advance, the operator can quickly place the first electric cell 111 and the second electric cell 112 in the correct position and quickly fix them, improving the assembly efficiency of the battery module.

[0046] Further, the positioning component 1150 comprises a positioning structure 1151 and a positioning column 1152. The positioning structure 1151 is a plurality of. Along the length direction of the main body 10, the plurality of positioning structures 1151 are respectively fixed on the opposite sides of the support frame 115, and the length of the positioning structure 1151 extends along the width direction of the support frame 115. The positioning structure 1151 close to the first electric cell 111 abuts against the first electric cell 111, and the positioning structure 1151 close to the second electric cell 112 abuts against the second electric cell 112. The positioning column 1152 comprises at least two. The at least two positioning columns 1152 are fixed on the support frame 115 and located between the first electric cell 111 and the second electric cell 112, and each positioning column 1152 abuts against the first electric cell 111 and the second electric cell 112 on the opposite sides along the length direction of the main body 10. The positioning structure 1151 and the positioning column 1152 cooperate with each other to limit the first electric cell 111 and the second electric cell 112 in the length direction of the main body 10, effectively preventing the first electric cell 111 and the second electric cell 112 from moving on the support frame 115, and ensuring that the first electric cell 111 and the second electric cell 112 can be stably fixed on the support frame 115. During the assembly process of the battery module, the positioning structure 1151 and the positioning column 1152 can also provide clear installation guidance for the electric cells. The operator can quickly and accurately place the first electric cell 111 and the second electric cell 112 in the correct position on the support frame 115, and judge whether the first electric cell 111 and the second electric cell 112 are installed in place by the abutment of the positioning component 1150.

[0047] The positioning component 1150 also includes at least two baffles. Along the length of the main body 10, the at least two baffles are respectively disposed on opposite sides of the support plate, and the at least two baffles respectively abut against the first battery cell 111 and the second battery cell 112.

[0048] Furthermore, at one end of the length of the main body 10, each positioning structure 1151 includes at least two. Each positioning structure 1151 includes a conductive strip 11511 and an insulating positioning block 11512. The conductive strip 11511 extends along the width direction of the main body 10 (e.g., ...). Figure 1 Extending in the direction indicated by the middle arrow Y, the conductive strip 11511 has insulating positioning blocks 11512 at both ends along its length. At least one positioning structure 1151's conductive strip 11511 is electrically connected to the positive electrode tab 113, and at least another positioning structure 1151's conductive strip 11511 is electrically connected to the negative electrode tab 114. The conductive strip 11511 extends along the width of the main body 10, increasing the contact area between the conductive strip 11511 and the first battery cell 111 or the second battery cell 112, achieving a better limiting effect and ensuring that the first battery cell 111 and the second battery cell 112 are stably fixed in the predetermined position of the support frame 115. The fact that at least one positioning structure 1151's conductive strip 11511 is electrically connected to the positive electrode tab 113 and at least another positioning structure 1151's conductive strip 11511 is electrically connected to the negative electrode tab 114 achieves electrical connection between the conductive strip 11511 and the positive electrode tab 113 or the negative electrode tab 114. The first busbar 1111 is fixedly connected to the first battery cell 111 via a conductive strip 11511 electrically connected to the positive electrode tab 113 and the negative electrode tab 114, thereby achieving series or parallel connection between the first battery cells 111 along the height direction of the main body 10. The second busbar 1121 is fixedly connected to the second battery cell 112 via a conductive strip 11511 electrically connected to the positive electrode tab 113 and the negative electrode tab 114, thereby achieving series or parallel connection between the second battery cells 112 along the height direction of the main body 10. The conductive strip 11511 provides stable support for the positive electrode tab 113 and the negative electrode tab 114, preventing damage to them. The conductive strip 11511 also facilitates the installation of the first busbar 1111 and the second busbar 1121 by the operator.

[0049] Further, on the same positioning structure 1151, along the height direction of the main body 10, at least one insulating positioning block 11512 is arranged through the support frame 115, one end of the at least one insulating positioning block 11512 is provided with a protruding column 11513, and the other end is provided with a groove 11514 matched with the protruding column 11513, among the adjacent two insulating positioning blocks 11512, the protruding column 11513 of the first insulating positioning block 11512 is embedded in the groove 11514 of the second insulating positioning block 11512. This connection mode can make the insulating positioning blocks 11512 more stably spliced together in the height direction of the main body 10, which can effectively prevent the relative displacement between the insulating positioning blocks 11512, thereby maintaining the stability of the battery module. The cooperation of the protruding column 11513 and the groove 11514 provides accurate positioning guidance for the assembly of the insulating positioning blocks 11512. During the assembly of the battery module, the operator can easily splice the insulating positioning blocks 11512 together according to the shape of the protruding column 11513 and the groove 11514, which reduces the assembly error of the cell assembly 11 in the height direction, and also improves the assembly efficiency and quality of the battery module.

[0050] Among them, along the height direction of the main body 10, the positioning column 1152 is arranged through the support frame 115, one end of the positioning column 1152 can also be provided with a protruding column 11513, and the other end is provided with a groove 11514 matched with the protruding column 11513, among the adjacent two positioning columns 1152, the protruding column 11513 of the first positioning column 1152 is embedded in the groove 11514 of the second positioning column 1152. The positioning column 1152 can also provide a certain guiding effect for the installation of the cell assembly 11, further enhancing the stability of the battery module.

[0051] Among them, on the same positioning structure 1151, along the height direction of the main body 10, the protruding column 11513 and the groove 11514 are in communication with each other. Along the height direction of the main body 10, the insulating positioning blocks 11512 of the plurality of cell assemblies 11 are in communication with each other to form a first channel, and the plurality of positioning columns 1152 are in communication with each other to form a second channel. When assembling the battery module, long screws can be installed in the first channel and the second channel to fix the plurality of cell assemblies 11 together.

[0052] Further, along the width direction of the main body 10, the opposite sides of the support frame 115 have bent flanges 1153, and the opposite sides of the first battery cell 111 along the width direction of the main body 10 and the opposite sides of the second battery cell 112 along the width direction of the main body 10 are all in abutment with the bent flanges 1153. The bent flanges 1153 can be bent upward. Along the width direction of the main body 10, the bent flanges 1153 on the opposite sides of the support frame 115 are all in abutment with the first battery cell 111 and the second battery cell 112, which limits the first battery cell 111 and the second battery cell 112 between the bent flanges 1153 on the opposite sides of the support frame 115, so as to prevent the first battery cell 111 and the second battery cell 112 from moving too much in the width direction of the main body 10, and further ensure the stability of the first battery cell 111 and the second battery cell 112.

[0053] Further, the battery cell assembly 11 further comprises a heat insulation pad 116. Along the height direction of the main body 10, the heat insulation pad 116 is installed on the side of the first battery cell 111 and the second battery cell 112 away from the support frame 115, and the heat insulation pad 116 at least partially covers the first battery cell 111 and the second battery cell 112. The heat insulation pad 116 is a foam pad, which can effectively prevent heat transfer between adjacent first battery cells 111 and between adjacent second battery cells 112 along the height direction of the main body 10, and maintain the temperature stability inside the battery module. The foam pad also has a certain buffering capacity, which can effectively absorb and disperse the energy when the battery cell assembly 11 is subjected to external impact or vibration, thereby improving the anti-shock performance of the battery module. The foam pad can fill the gap between the first battery cell 111 or the second battery cell 112 and other components in the battery module, so that the internal structure of the battery module is more compact, and the first battery cell 111 and the second battery cell 112 can be stably positioned at the predetermined position of the support frame 115. Along the length direction of the main body 10, the side of the first battery cell 111 and the second battery cell 112 away from the positioning column 1152 is provided with a foam strip 117 extending along the width direction of the main body 10. The foam strip 117 can prevent the welding slag generated during the process of welding the first bus bar 1111 and the second bus bar 1121 to the conductive strip 11511 from splashing.

[0054] The top cover plate and the bottom cover plate can protect the main body and prevent external objects from damaging the battery cell assembly.

[0055] On the other hand, the application also provides a battery pack comprising the battery module described above, so that the battery pack comprises all the technical effects of the battery module. Since the technical effects of the battery module have been described in detail above, they will not be described here again.

[0056] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical" and "horizontal" as can be perceived herein relative to the accompanying drawings refer to the orientation of the components being described. However, it is to be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device described herein relative to the other device or structure is inverted, then a spatially relative term such as "above" can be interpreted as meaning "below" or "below" can be interpreted as meaning "above". The device can also be oriented in other ways (rotated at 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0057] In addition, it should be pointed out that the use of "first", "second" and the like words to qualify parts, is only intended to facilitate the distinction of the corresponding parts, and does not have a special meaning unless otherwise stated, and therefore cannot be understood as a limitation on the scope of protection of the present application.

[0058] The preferred embodiments of the present application have been described above with the purpose of enabling not to limit the scope of protection of the present application, but of enabling a person skilled in the art to make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery module, characterized by, The application relates to a battery, which comprises: a main body (10) comprising a plurality of cell assemblies (11) arranged in sequence along the height direction of the main body (10), each of the cell assemblies (11) comprising first cells (111) and second cells (112) arranged in sequence along the length direction of the main body (10), each of the first cells (111) and the second cells (112) comprising a positive electrode tab (113) and a negative electrode tab (114); wherein the positive electrode tab (113) of one of the first cell (111) and the second cell (112) at the top end of the main body (10) is connected with a positive electrode lead-out end (12), and the negative electrode tab (114) of the other one is connected with a negative electrode lead-out end (13); along the height direction of the main body (10), two adjacent first cells (111) are connected in series or parallel through a first bus bar (1111), two adjacent second cells (112) are connected in series or parallel through a second bus bar (1121), and the first cell (111) and the second cell (112) of the cell assembly (11) at the bottom end of the main body (10) are connected in series or parallel through a bottom bus bar (1122).

2. The battery module of claim 1, wherein, The positive electrode tab (113) of one of the first cell (111) and the second cell (112) of the cell assembly (11) at the bottom end of the main body (10) is electrically connected with one end of the bottom bus bar (1122), and the negative electrode tab (114) of the other one is electrically connected with the other end of the bottom bus bar (1122).

3. The battery module of claim 2, wherein, On each of the cell assemblies (11), along the length direction of the main body (10), the positive electrode tab (113) and the negative electrode tab (114) of the first cell (111) are located on the side of the first cell (111) away from the second cell (112), and the positive electrode tab (113) and the negative electrode tab (114) of the second cell (112) are located on the side of the second cell (112) away from the first cell (111); wherein the bottom bus bar (1122) has a U-shaped structure, and the U-shaped structure is arranged around the cell assembly (11) at the bottom end of the main body (10).

4. The battery module of claim 3, wherein, The cell assembly (11) further comprises: a support frame (115) on which the first cells (111) and the second cells (112) are installed in sequence along the length direction of the main body (10), and the support frame (115) is provided with a positioning component (1150) used for fixing the first cells (111) and the second cells (112) to predetermined positions on the support frame (115).

5. The battery module of claim 4, wherein, The positioning component (1150) comprises: Positioning structures (1151) are provided on opposite sides of the support frame (115) along the length direction of the main body (10), and the lengths of the positioning structures (1151) extend along the width direction of the support frame (115). The positioning structure (1151) close to the first battery cell (111) abuts against the first battery cell (111), and the positioning structure (1151) close to the second battery cell (112) abuts against the second battery cell (112). Positioning columns (1152) are provided on the support frame (115) between the first battery cell (111) and the second battery cell (112), and the lengths of the positioning columns (1152) extend along the length direction of the main body (10). The positioning columns (1152) abut against the first battery cell (111) and the second battery cell (112) on opposite sides along the length direction of the main body (10).

6. The battery module of claim 5, wherein, At one end of the length of the main body (10), each of the positioning structures (1151) includes a conductive strip (11511) and an insulating positioning block (11512). The conductive strip (11511) extends along the width direction of the main body (10), and the two ends of the conductive strip (11511) along the length direction are provided with the insulating positioning blocks (11512). The conductive strip (11511) of at least one of the positioning structures (1151) is electrically connected to the positive tab (113), and the conductive strip (11511) of at least another of the positioning structures (1151) is electrically connected to the negative tab (114).

7. The battery module of claim 6, wherein, On the same positioning structure (1151), at least one of the insulating positioning blocks (11512) is provided through the support frame (115) along the height direction of the main body (10). One end of the insulating positioning block (11512) is provided with a protruding column (11513), and the other end is provided with a groove (11514) matched with the protruding column (11513). In adjacent two of the insulating positioning blocks (11512), the protruding column (11513) of the first insulating positioning block (11512) is embedded in the groove (11514) of the second insulating positioning block (11512).

8. The battery module of claim 4, wherein, On opposite sides of the support frame (115) along the width direction of the main body (10), there are bending flanges (1153), and the first battery cell (111) and the second battery cell (112) abut against the bending flanges (1153) on opposite sides along the width direction of the main body (10).

9. The battery module of claim 4, wherein, The battery cell assembly (11) further comprises: A heat insulation pad (116) is installed on the side of the first and second battery cells (111, 112) facing away from the support frame (115) along the height direction of the main body (10) and at least partially covers the first and second battery cells (111, 112).

10. A battery pack, characterized by, The battery pack comprises the battery module according to any one of claims 1 to 9.

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