Battery module and battery pack comprising same

Abstract

The utility model relates to the technical field of battery production, in particular to a battery module and a battery pack comprising the battery module, the battery module comprises battery cells and a circuit board, the multiple battery cells are sequentially arranged in the first direction, and each battery cell comprises a shell; and the circuit board is electrically connected with the shell of each battery cell through a plug-in structure and is used for acquiring and transmitting working data of the battery cells. According to the battery module provided by the invention, the circuit board is electrically connected with the shell of each battery cell through the plug-in structure, the connection mode is simple, the reliability is high, the assembly process of the battery module is simplified, the stability of electrical connection between the battery cells and the circuit board is also improved, and accurate acquisition of working data of the battery cells is realized.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and particularly relates to a battery module and a battery pack including the same. Background Art

[0002] A battery module is a key component of a battery pack. It is composed of multiple battery cells combined in series or parallel to provide higher voltage and capacity. The busbar bracket is an important structure in the battery module, which plays the roles of carrying and connecting the busbar and connecting the single battery cells. The busbar connects multiple battery cells into a whole, and through centralized management and control, it improves the power, voltage, and current output of the battery module, thereby ensuring the stable operation of the battery pack.

[0003] In order to simplify the assembly process of the battery module and improve the production efficiency of the battery pack, usually the circuit board, the busbar, and the busbar bracket are integrated into a whole. Among them, the circuit board is fixedly connected to the busbar by welding, and is used to collect the voltage information on the busbar. However, the cost of the welding equipment is relatively high, resulting in an increase in the production cost of the battery pack. Especially, the welding efficiency of the FPC (Flexible Printed Circuit) and the busbar is relatively low, the welding consistency is poor, and there are potential hazards such as missed welding and false welding, which cannot accurately collect the voltage of the battery module, and thus cannot accurately calculate the power of the battery pack, affecting the use safety of the battery pack.

[0004] In view of this, the present application is specifically proposed. Utility Model Content

[0005] The present application provides a battery module and a battery pack including the same, aiming to solve the problems of how to improve the assembly efficiency of the battery module and accurately collect the voltage of the battery module.

[0006] On the one hand, the present application provides a battery module, including:

[0007] Battery cells, a plurality of the battery cells are arranged in sequence along a first direction, and the battery cells include outer casings;

[0008] A circuit board, electrically connected to the outer casing of each battery cell through a plug-in structure, and is used to collect and transmit the working data of the battery cell.

[0009] In some embodiments, one of the circuit board and the outer casing is provided with a male terminal, and the other is provided with a female terminal. The female terminal has a plug-in slot for the male terminal to be inserted and loaded, so that the male terminal is inserted and loaded into the plug-in slot to form the plug-in structure and be electrically connected to the female terminal.

[0010] In some of these embodiments, the housing includes a top cover, and the circuit board is disposed above the top cover;

[0011] The male terminals are disposed on the top cover and protrude upward, and the female terminals are disposed on the circuit board and protrude downward. A plurality of the female terminals are sequentially arranged at intervals so that the male terminals are inserted and mated with the corresponding female terminals.

[0012] In some of these embodiments, the battery cell further includes a pole column disposed on the top cover. The pole column of the same battery cell and the male terminal are spaced apart in a second direction perpendicular to the first direction.

[0013] In some of these embodiments, the pole column and the circuit board are oppositely disposed at two ends of the battery module in the second direction.

[0014] In some of these embodiments, the male terminals of two adjacent battery cells are spaced apart, and the male terminals of a plurality of the battery cells are sequentially arranged in a staggered manner in the first direction.

[0015] In some of these embodiments, the battery module further includes a low-voltage plug-in, and the low-voltage plug-in is installed at one end of the circuit board in the first direction.

[0016] In some of these embodiments, the polarities of the pole columns of two adjacent battery cells are opposite, and the battery module further includes a busbar support assembly. Each battery cell is electrically connected to the busbar support assembly respectively. Among them,

[0017] The busbar support assembly includes:

[0018] A busbar support body;

[0019] A busbar body for electrically connecting the pole columns of two adjacent battery cells. A plurality of the busbar bodies are sequentially arranged on the busbar support body in the first direction so that a plurality of the battery cells are connected in series with each other.

[0020] In some of these embodiments, the busbar support body is provided with a receiving groove for receiving the busbar body. A plurality of the receiving grooves are sequentially arranged at intervals in the first direction so that the busbar body is fixed in the corresponding receiving groove.

[0021] On the other hand, the present application also provides a battery pack, including the battery module described above.

[0022] After adopting the above technical solutions, the present application has the following beneficial effects compared with the prior art.

[0023] 1. In the battery module of the present application, the circuit board is electrically connected to the outer shell of each battery cell through a plug-in structure. The connection method is simple and highly reliable, which not only simplifies the assembly process of the battery module but also improves the stability of the electrical connection between the battery cell and the circuit board, enabling accurate acquisition of the working data of the battery cell.

[0024] 2. In the battery module of the present application, the circuit board is detachably connected to the battery cell through a plug-in structure. The connection method between the circuit board and the battery cell is simple, and the disassembly and assembly are convenient, which is beneficial to the maintenance and replacement of the battery module. Especially when a single battery cell fails, there is no need to scrap the entire battery pack, significantly reducing the maintenance cost of the battery pack.

[0025] 3. Since the battery pack of the present application includes the battery module of the present application, it simultaneously includes all the above advantages of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of a battery module in an embodiment of the present application;

[0027] Figure 2 is Figure 1 a partial enlarged view of part A in

[0028] Figure 3 is an exploded view of a battery module in an embodiment of the present application;

[0029] Figure 4 is an assembly schematic diagram of a battery cell and a bus bar support assembly in an embodiment of the present application;

[0030] Figure 5 is Figure 4 a partial enlarged view of part B in

[0031] Figure 6 is a schematic structural diagram of a circuit board assembly in an embodiment of the present application;

[0032] Figure 7 is Figure 6 a partial enlarged view of part C in

[0033] Figure 8 is an assembly schematic diagram of a male terminal and a female terminal in an embodiment of the present application.

[0034] In the figure: 100, battery module; 110, battery cell; 110A, first battery cell; 110B, second battery cell; 111, top cover; 112, male terminal; 113, pole; 120, circuit board assembly; 121, circuit board; 122, female terminal; 1221, plug-in slot; 130, bus bar support assembly; 131, bus bar support body; 132, bus bar body; 133, avoidance notch; 140, low-voltage plug-in. Detailed implementation manners

[0035] The technical solutions of the present application will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0036] A battery module 100 is provided in an embodiment of the present application and is applied to a battery pack. For the specific structure of the battery module 100, please refer to Figures 1 to 8 , which includes battery cells 110 and a circuit board 121. Among them, a plurality of battery cells 110 are arranged in sequence along a first direction, and the battery cells 110 include outer casings; the circuit board 121 is electrically connected to the outer casings of each battery cell 110 through a plug-in structure and is used for collecting and transmitting the working data of the battery cells 110.

[0037] According to the battery module 100 of the application, the circuit board 121 is electrically connected to the outer casing of each battery cell 110 through a plug-in structure. The connection method is simple and highly reliable. It not only simplifies the assembly process of the battery module 100, but also improves the stability of the electrical connection between the battery cell 110 and the circuit board 121, realizing accurate collection of the working data of the battery cell 110. At the same time, the circuit board 121 is detachably connected to the battery cell 110 through the plug-in structure. The connection method between the circuit board 121 and the battery cell 110 is simple, and the disassembly and assembly are convenient, which is beneficial to the maintenance and replacement of the battery module 100. Especially when a single battery cell 110 fails, it is not necessary to scrap the entire battery pack, significantly reducing the maintenance cost of the battery pack.

[0038] As Figure 2 , Figure 5 and Figures 6 to 8 shown, one of the circuit board 121 and the outer casing is provided with a male terminal 112, and the other is provided with a female terminal 122. The female terminal 122 has a plug-in slot 1221 for the male terminal 112 to be inserted and installed, so that the male terminal 112 is inserted into the plug-in slot 1221 to form a plug-in structure and is electrically connected to the female terminal 122. Among them, the male terminal 112 and the female terminal 122 are pluggable connectors, which have the advantages of high performance, high reliability, high density, easy installation, etc. By inserting the male terminal 112 and the female terminal 122 into each other, the transmission of current or signal is realized. Moreover, a plug-in structure is formed between the male terminal 112 and the female terminal 122, and the contact area between the male terminal 112 and the female terminal 122 is large, making the connection between the circuit board 121 and the battery cell 110 highly reliable, which is beneficial to accurately collect and transmit the working data of the battery cell 110. Exemplarily, the working data of the battery cell 110 may include voltage and / or the temperature of the battery cell 110, but is not limited thereto.

[0039] As Figures 2 to 5As shown, the housing of the battery cell 110 includes a top cover 111. The circuit board 121 is disposed above the top cover 111. The male terminal 112 is disposed on the top cover 111 and protrudes upward. The female terminal 122 is disposed on the circuit board 121 and protrudes downward. A plurality of female terminals 122 are sequentially arranged at intervals, so that the male terminal 112 is inserted and mated with the corresponding female terminal 122, enabling the circuit board 121 to be quickly inserted and loaded into the insertion slot 1221 from top to bottom. The operation is simple and the positioning is accurate, ensuring that the male terminal 112 of each battery cell 110 is accurately inserted into the corresponding female terminal 122 on the circuit board 121, which can effectively improve the assembly efficiency of the battery module 100 and thus improve the production efficiency of the battery pack.

[0040] Figure 2 、 Figure 5 and Figures 6 to 8 As shown, a plurality of female terminals 122 arranged in sequence along the first direction are integrated on the circuit board 121 to form a circuit board assembly 120. Exemplarily, the plurality of female terminals 122 can be integrated on the circuit board 121 by means of reflow soldering, but not limited thereto. And a male terminal 112 is integrated on the top cover 111 of each battery cell 110. Exemplarily, the plurality of female terminals 122 can be integrally formed with the top cover 111 of the battery cell 110 or fixedly connected into one body by welding, but not limited thereto. The male terminals 112 of the plurality of battery cells 110 are arranged in one-to-one correspondence with the plurality of female terminals 122 on the circuit board 121, realizing accurate acquisition of the working data of the battery cells 110.

[0041] Preferably, the circuit board 121 is a PCB (Printed Circuit Board, that is, the printed circuit board 121). Compared with the FPC, the PCB can be integrated with the female terminal 122 by means of reflow soldering. The connection method is simple, the production efficiency is high, and the stability is good.

[0042] As Figure 2 、 Figure 3 and Figure 5 As shown, the battery cell 110 further includes a pole post 113 disposed on the top cover 111. The pole post 113 and the male terminal 112 of the same battery cell 110 are arranged at intervals in a second direction perpendicular to the first direction, facilitating the electrical connection between the busbar support assembly 130 and the pole post 113 of the battery cell 110 to realize the sequential series connection of the plurality of battery cells 110, and the female terminal 122 on the circuit board 121 is electrically connected to the male terminal 112 disposed on the top cover 111 to realize accurate voltage acquisition of each battery cell 110.

[0043] The first direction is substantially perpendicular to the height direction of the battery module 100. The first direction may be substantially parallel to the length direction of the battery module 100. Of course, the first direction may also be substantially parallel to the thickness direction of the battery module 100. For the convenience of description, in this embodiment, the first direction is substantially parallel to the length direction of the battery module 100, and the second direction is substantially parallel to the thickness direction of the battery module 100.

[0044] As Figure 2 , Figure 3 and Figure 5 shown, the pole posts 113 and the circuit board 121 are oppositely arranged at both ends of the battery module 100 along the second direction, that is, the bus bar support assembly 130 and the circuit board 121 are oppositely arranged at both ends of the battery module 100 along the second direction. Thus, the bus bar support assembly 130 connects a plurality of battery cells 110 in series as a whole. The circuit board 121 and the battery cells 110 are electrically connected through a plug-in structure to accurately collect the voltage of each battery cell 110.

[0045] As Figure 2 , Figure 5 and Figures 6 to 8 shown, the male terminals 112 of two adjacent battery cells 110 are arranged at intervals, and the male terminals 112 of a plurality of battery cells 110 are arranged in a staggered manner in sequence along the first direction. Correspondingly, a plurality of female terminals 122 are arranged in a staggered manner in sequence along the first direction and are inserted and matched with the corresponding male terminals 112. The assembly of the circuit board 121 and the battery cells 110 is more convenient, and the connection between the two is more firm.

[0046] As Figure 1 and Figure 3 shown, the battery module 100 further includes a low-voltage plug-in 140. The low-voltage plug-in 140 is installed at one end of the circuit board 121 along the first direction. By providing the low-voltage plug-in 140, the circuit connection is completed at a low voltage to realize signal transmission and power transfer, thereby transmitting the working data of the battery cells 110.

[0047] As Figure 1 , Figure 3 and Figure 4 shown, the battery cell 110 with the pole post 113 at the top end being the negative pole post 113 is the first battery cell 110A, and the battery cell 110 with the pole post 113 at the top end being the positive pole post 113 is the second battery cell 110B. Two adjacent first battery cells 110A and second battery cells 110B whose tops are connected by the bus bar support assembly 130 form a battery cell 110 unit to realize the series connection of the battery cells 110. The structure is simple and easy to prepare. Moreover, the housing of each battery cell 110 is positively charged, that is, the top cover 111 of each battery cell 110 is positively charged. Furthermore, the circuit board 121 can be electrically connected to the top end of the battery cell 110, and the voltage of each battery cell 110 can be accurately detected.

[0048] As shown in Figure 1 , Figure 3 and Figure 4 , the polar columns 113 of two adjacent battery cells 110 have opposite electric polarities. The battery module 100 further includes a busbar support assembly 130. Each battery cell 110 is electrically connected to the busbar support assembly 130 respectively. The structure is simple, the connection and fixation are convenient and easy, which is conducive to reducing the production cost, improving the space utilization rate in the battery pack, and making the connection of the battery cells 110 more stable and reliable.

[0049] For the specific structure of the busbar support assembly 130, please refer to Figures 1 to 5 , which includes a busbar support body 131 and a busbar body 132. Among them, the busbar support body 131 is used to electrically connect the polar columns 113 of two adjacent battery cells 110. A plurality of busbar bodies 132 are arranged on the busbar support body 131 in sequence along the first direction, so that a plurality of battery cells 110 are connected in series with each other, which can realize the seamless connection between the busbar body 132 and the busbar support body 131, improve the connection strength between the busbar body 132 and the busbar support body 131, the reliability of the busbar body 132 for passing current is relatively high, and the busbar body 132 and the busbar support body 131 are integrated together, reducing their thickness, which is beneficial to the lightweight design of the battery module 100.

[0050] As an embodiment not shown, the busbar support body 131 is provided with a receiving groove for receiving the busbar body 132. A plurality of receiving grooves are arranged at intervals in sequence along the first direction, so that the busbar body 132 is fixed in the corresponding receiving groove. By fixing the busbar body 132 in the receiving groove, it is ensured that the busbar body 132 is seamlessly connected to the busbar support body 131, the connection is firm, the stability is good, and the space occupancy rate is low.

[0051] As an embodiment not shown, through holes are formed in the bottom of the receiving groove. The through holes are located above the polar columns 113 of each battery cell 110. The busbar body 132 is arranged in the receiving groove and is exposed through the through holes to be electrically connected to the corresponding polar columns 113, thereby connecting a plurality of battery cells 110 into a whole, ensuring stable current output, and thus ensuring the stable operation of the energy storage device. The energy storage device can be a device with a battery swapping function such as a vehicle or a working machine.

[0052] As shown in Figure 2 and Figure 3As shown, multiple battery cells 110 are arranged in sequence along the first direction to form a battery cell group 110. A battery positive electrode and a battery negative electrode are respectively arranged at both ends of the battery cell group 110 along the first direction. Exemplarily, among the battery cells 110 at both ends of the battery cell group 110 along the first direction, the terminal 113 of one battery cell 110 is positively charged as the battery positive electrode, and the terminal 113 of the other battery cell 110 is negatively charged as the battery negative electrode. Avoidance notches 133 are arranged at one end and / or both ends of the busbar support body 131 along the first direction, and the avoidance notches 133 corresponding to the battery positive electrode and / or the battery negative electrode protrude from the busbar support body 131.

[0053] The assembly process of the battery module 100 according to an embodiment of the present application will be described below with reference to the accompanying drawings.

[0054] As Figure 1 、 Figure 3 and Figure 4 shown, a male terminal 112 is integrated on the top cover 111 of each battery cell 110. Multiple battery cells 110 are arranged in sequence along the first direction to form a battery cell group 110, and the male terminals 112 on the top covers 111 of the multiple battery cells 110 are arranged in a staggered manner in sequence along the first direction. Then, the busbar support assembly 130 is installed on the battery cell group 110. The busbar support body 131 is placed on the top cover 111 of the battery cell 110. Multiple busbar bodies 132 are arranged in one-to-one correspondence with the terminals 113 on the top covers 111 of the multiple battery cells 110 and are fixedly connected by welding to realize the series connection of two adjacent battery cells 110. Thus, multiple battery cells 110 are connected in series in sequence. Then, the circuit board assembly 120 is installed on the battery cell group 110. Multiple female terminals 122 are arranged in one-to-one correspondence with the male terminals 112 on the top covers 111 of the multiple battery cells 110 and are fixedly connected by plugging, thereby forming the battery module 100. Since the male terminal 112 is in plug-in cooperation with the female terminal 122 on each battery cell 110, the plugging structure has high reliability, ensuring the electrical connection between the battery cell 110 and the circuit board 121. During the operation of the battery pack, the voltage of each battery cell 110 can be accurately collected, effectively improving the use safety and service life of the battery module 100.

[0055] The battery pack in the present application is applied to an energy storage device, and the energy storage device can be a device with a battery swapping function such as a vehicle or a working machine.

[0056] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0057] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0058] In the present application, unless otherwise clearly defined and limited, the terms such as "mounted", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0059] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0060] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as a limitation to the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A battery module, characterized in that: include: A battery cell, wherein a plurality of the battery cells are arranged in sequence along a first direction, and the battery cell comprises a shell; The circuit board is electrically connected to the shell of each battery cell via a plug-in structure, and is used to collect and transmit the working data of the battery cell.

2. The battery module according to claim 1, characterized in that: One of the circuit board and the housing is provided with a male terminal, and the other is provided with a female terminal. The female terminal has a plug-in slot for the male terminal to be inserted into, so that the male terminal is inserted into the plug-in slot to form the plug-in structure and be electrically connected to the female terminal.

3. The battery module according to claim 2, characterized in that: The housing comprises a top cover, and the circuit board is arranged above the top cover; The male terminal is arranged on the top cover and protrudes upward, the female terminal is arranged on the circuit board and protrudes downward, and a plurality of the female terminals are arranged in sequence at intervals so that the male terminal can be plugged and matched with the corresponding female terminal.

4. The battery module according to claim 3, characterized in that: The battery cell further includes a pole arranged on the top cover, and the pole and the male terminal of the same battery cell are spaced apart from each other along a second direction perpendicular to the first direction.

5. The battery module according to claim 4, characterized in that: The poles and the circuit board are arranged opposite to each other at two ends of the battery module along the second direction.

6. The battery module according to claim 5, characterized in that: The male terminals of two adjacent battery cells are arranged at intervals, and the male terminals of a plurality of battery cells are arranged alternately in sequence along the first direction.

7. The battery module according to claim 1, characterized in that: The battery module further includes a low-voltage plug-in installed at one end of the circuit board along the first direction.

8. The battery module according to claim 4, characterized in that: The poles of two adjacent cells have opposite electrical properties, and the battery module further includes a busbar support assembly, and each cell is electrically connected to the busbar support assembly, wherein: The busbar support assembly comprises: Busbar support body; The busbar body is used to electrically connect the poles of two adjacent battery cells. A plurality of the busbar bodies are sequentially arranged on the busbar support body along the first direction so that the plurality of battery cells are connected in series.

9. The battery module according to claim 8, characterized in that: The busbar support body is provided with a receiving groove for accommodating the busbar body, and a plurality of the receiving grooves are sequentially arranged at intervals along the first direction so that the busbar body is fixed in the corresponding receiving grooves.

10. A battery pack, characterized in that: A battery module comprising the battery module according to any one of claims 1 to 9.

Images