Battery module and battery pack

Abstract

The utility model provides a battery module and a battery pack, and relates to the technical field of batteries. Wherein the busbar is directly and accurately positioned by using the positioning columns on the battery cell pole columns, and then the integrated circuit board assembly is stably mounted on the busbar, so that the busbar and the integrated circuit board assembly are in efficient and accurate butt joint, the mounting process of the battery module is simplified, and the battery module mounting efficiency is improved. And the overall cost of the battery module structural member is remarkably reduced, so that the preparation cost of the battery pack is relatively low.

Description

Technical Field

[0001] This application relates to a battery module and a battery pack, belonging to the technical field of batteries. Background Art

[0002] Currently, a battery module usually consists of multiple parts such as battery cells, busbars, and integrated circuit board assemblies. The precise positioning and efficient integration of these components are crucial for improving the overall performance of the battery module.

[0003] However, in the design and integration process of existing battery modules, there are several significant problems. First, battery modules usually rely on additional structural components such as trays to position and support battery cells, busbars, and integrated circuit board assemblies. This not only increases the cost of the battery module but also limits the space utilization rate of the battery module. Second, the manufacturing process of battery modules is relatively cumbersome, involving multiple independent steps such as tray installation, component positioning and fixing, etc. This not only takes time and effort but also easily introduces errors, further driving up the overall production cost.

[0004] Therefore, the current urgent problem to be solved is how to solve the problem of over-reliance on additional structural components such as trays to position and support battery cells, busbars, and integrated circuit board assemblies in the prior art. Utility Model Content

[0005] This application provides a battery and a battery pack, which solves the problem of over-reliance on additional structural components such as trays to position and support battery cells, busbars, and integrated circuit board groups in the related art.

[0006] In a first aspect, this application provides a battery, including:

[0007] A battery stack, the battery stack includes battery cells, pole columns are provided on the battery cells, and positioning columns are provided on the tops of the pole columns;

[0008] A busbar unit, the busbar unit is fixed above the battery stack through the positioning columns;

[0009] An integrated circuit board assembly, located above the busbar unit and fixedly connected to the busbar unit.

[0010] In an implementation manner, the number of the busbar units is two; the two busbar units are symmetrically arranged at both ends of the top of the battery stack;

[0011] Multiple adjacent busbars are provided in each of the two busbar units, and the multiple busbars are fixedly connected to each other;

[0012] The arrangement direction of the multiple busbars is perpendicular to the arrangement direction of the multiple busbar units.

[0013] In one embodiment, through holes are provided in each bus bar;

[0014] Each bus bar passes through the positioning post through the through hole and is fixed above the battery stack.

[0015] In one embodiment, the cross-section of the pole post is rectangular; the cross-section of the positioning post is square, and the cross-sectional shape of the through hole is the same as that of the positioning post.

[0016] In one embodiment, a first limiting block is provided on one side of the top of the first bus bar unit away from the second bus bar unit;

[0017] A second limiting block is provided on one side of the top of the second bus bar unit away from the first bus bar unit. The limiting blocks are used to limit the integrated circuit board assembly, and both the first limiting block and the second limiting block are used to limit the integrated circuit board assembly.

[0018] In one embodiment, the integrated circuit board assembly includes a circuit board and a plug connected to a short side of one side of the circuit board.

[0019] In one embodiment, the integrated circuit board assembly further includes a plurality of terminals located on the long side of the circuit board, and the plurality of terminals are arranged at intervals;

[0020] One end of each terminal is connected to the circuit board, and the other end of each terminal is connected to the bus bar unit.

[0021] In one embodiment, the integrated circuit board assembly further includes a buffer pad located between the circuit board and the battery stack.

[0022] In one embodiment, at least two buffer pads are provided, and the two buffer pads are arranged adjacent to each other along the short side direction of the circuit board.

[0023] In a second aspect, based on the above battery module, the present application further provides a battery pack including the above battery module.

[0024] In the battery module provided by the present application, the battery stack is composed of a plurality of battery cells, and each battery cell is equipped with a pole post at the top, and a positioning post is provided above the pole post. These positioning posts serve as fixed fulcrums for the bus bar units, enabling the bus bar units to be accurately installed and fixed above the battery stack, so that the battery stack can limit the bus bar units, making the structure stable when the bus bar units are arranged on the battery stack.

[0025] An integrated circuit board assembly is arranged above the busbar unit, enabling the busbar unit to limit the integrated circuit board assembly, further enabling the integrated circuit board assembly to be stably located above the battery stack, thereby simplifying the assembly process of the battery module, reducing unnecessary structural components, and at the same time, ensuring the structural stability of the battery module and significantly reducing the manufacturing cost of the structural components of the battery module.

[0026] In the battery pack provided by this application, due to the application of the above battery module, the manufacturing cost of the battery pack can be made lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application and used together with the specification to explain the principles of this application.

[0028] Figure 1 Schematic diagram of the battery module according to an embodiment of this application;

[0029] Figure 2 Installation schematic diagram of the battery module according to an embodiment of this application;

[0030] Figure 3 Structural sectional view of the battery module according to an embodiment of this application;

[0031] Figure 4 Installation schematic diagram of the integrated circuit board assembly according to an embodiment of this application;

[0032] Figure 5 Schematic diagram of the battery cell according to an embodiment of this application;

[0033] Figure 6 Installation schematic diagram of the busbar and the battery cell according to an embodiment of this application.

[0034] REFERENCE NUMERALS:

[0035] Battery stack - 100, battery cell - 101, pole - 102, positioning post - 103, pressure limiting valve - 104,

[0036] Busbar unit - 200, busbar - 201, through hole - 202, first busbar unit - 203, second busbar unit - 204, first limiting block - 205, second limiting block - 206,

[0037] Integrated circuit board assembly - 300, circuit board - 301, plug - 302, terminal - 303, buffer pad - 304. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and should not be construed as limiting the present application.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship 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 limiting the present application.

[0040] 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, 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.

[0041] In the present application, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. 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 defined. 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.

[0042] In the present application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0043] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means 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 this application. In this specification, the schematic expressions 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.

[0044] Currently, a battery module usually consists of multiple parts such as battery cells, busbars, integrated circuit board assemblies, etc. The precise positioning and efficient integration of these components are crucial for improving the overall performance of the battery module.

[0045] However, in the existing battery module design and integration process, there are several significant problems. First, the battery module usually relies on additional structural components such as trays to position and support the battery cells, busbars, and integrated circuit board assemblies. This not only increases the cost of the battery module but also limits the space utilization rate of the battery module. Second, the manufacturing process of the battery module is relatively cumbersome, involving multiple independent steps such as tray installation, component positioning and fixing, etc. This not only takes time and effort but also easily introduces errors, further driving up the overall production cost.

[0046] Therefore, the problem that urgently needs to be solved currently is how to solve the problem of excessive reliance on additional structural components such as trays to position and support the battery cells, busbars, and integrated circuit board assemblies in the prior art.

[0047] In the battery module provided by this application, the battery stack is composed of multiple battery cells. Each battery cell is equipped with a terminal post at the top, and a positioning post is arranged above the terminal post. These positioning posts serve as the fixed fulcrums of the busbar unit, enabling the busbar unit to be accurately installed and fixed above the battery stack, so that the battery stack can limit the busbar unit, making the structure of the busbar unit stable when it is arranged on the battery stack.

[0048] An integrated circuit board assembly is arranged above the busbar unit, enabling the busbar unit to limit the integrated circuit board assembly, further making the integrated circuit board assembly firmly located above the battery stack, thus simplifying the assembly process of the battery module, reducing unnecessary structural components. At the same time, it can also ensure the structural stability of the battery module and significantly reduce the preparation cost of the structural components of the battery module.

[0049] In the battery pack provided by this application, due to the application of the above battery module, the preparation cost of the battery pack can be made lower.

[0050] The battery module and battery pack provided by the present application will be described in detail below with reference to specific embodiments.

[0051] An embodiment of the present application provides a battery module. Referring to Figures 1 to 6 as shown, it includes a battery stack 100, a busbar unit 200, and an integrated circuit board assembly 300. This battery module can be applied to a battery pack, which can relatively reduce the preparation cost of the battery pack.

[0052] The battery stack 100 is the basic support component of the battery module of the present application. The battery stack 100 can provide a support basis for at least some other components of the battery module. The battery stack 100 is composed of battery cells 101. Each battery cell 101 is provided with a pole column 102, and a positioning column 103 is provided at the top of the pole column 102. The positioning column 103, as a key component for fixing at least some other components, can limit the position of at least some other components, and thus the battery stack 100 can limit the position of at least some other components.

[0053] The busbar unit 200 is fixed above the battery stack 100 through the positioning column 103, so that the battery stack 100 can limit the position of the busbar unit 200, thereby ensuring a stable connection between the battery stack 100 and the busbar unit 200. The busbar unit 200 is composed of a plurality of independent busbars 201. These busbars 201 are closely arranged inside the busbar unit 200 and jointly undertake the tasks of current collection and distribution.

[0054] The integrated circuit board assembly 300 is located above the busbar unit 200, so that the busbar unit can limit the position of the integrated circuit board assembly 300, and further the battery stack 100 can limit the position of the integrated circuit board assembly 300, thereby making the battery module of the present application use relatively less materials, have a more compact structure, and the preparation cost can be reduced.

[0055] In some embodiments, referring to Figure 1 , Figure 2 and Figure 5 as shown. The battery stack 100 is composed of a plurality of battery cells 101 adhesively connected side by side. Each battery cell 101 is provided with a pole column 102, and a positioning column 103 is provided at the top of the pole column 102. The pole column 102 supports the positioning column 103, so that the positioning column 103 can be stably fixed above the pole column 102. The positioning column 103 can fix and support at least some other components, so that at least some other components can be stably fixed above the battery cell 101.

[0056] Specifically, the battery stack 100 is an integral structure formed by a plurality of battery cells 101 adhesively connected side by side and tightly. This design enables the battery stack 100 to maintain a high energy density while also ensuring the compactness and stability of the structure.

[0057] Each battery cell 101 is provided with a terminal post 102. The main body of the terminal post 102 can be a cuboid, and the corresponding cross-sectional shape is a rectangle. Such a design is not only convenient for processing and manufacturing but also provides a stable support structure. The top of the terminal post 102 is flat and firm, which can support the positioning post 103 placed above it, withstand the pressure and possible vibration impact from the positioning post 103, ensure that the positioning post 103 can be firmly fixed above the terminal post 102, and will not loosen or shift due to vibration or other external factors.

[0058] The main body of the positioning post 103 is designed in a square shape. This shape selection is not only convenient for processing and positioning but also enhances its structural stability and load-bearing capacity. The bottom of the square positioning post 103 is closely attached to the top of the terminal post 102. Through precise dimension control and mating design, it is ensured that the positioning post 103 can be firmly fixed on the terminal post, effectively preventing loosening or displacement caused by vibration or external impact.

[0059] In some embodiments, refer to Figure 5 As shown. The main body shape of the battery cell 102 is a cuboid. The terminal posts 102 are symmetrically arranged at both ends on the top of the battery cell 102, and a positioning block 103 is provided at the center position on the top of the terminal posts 102. A pressure limiting valve 104 is provided between the two terminal posts 102.

[0060] Specifically, the battery cell 102, as a basic component unit of the battery stack 100, is designed with a compact cuboid shape to optimize space utilization and facilitate integration. On the top of the battery cell 102, two symmetrically distributed terminal posts 102 are provided. These two terminal posts serve as the connection bridges between the battery cell 102 and other components and play an important role in structural support. At the center position on the top of each terminal post 102, a positioning block 103 is further installed. This positioning block is designed to ensure precise docking and firm fixation with the upper components, thereby improving the structural stability and reliability of the entire battery module.

[0061] In addition, a pressure limiting valve 104 is provided in the area between the two terminal posts 102. The function of the pressure limiting valve 104 is to automatically open when the internal pressure of the battery cell 102 rises abnormally, release the internal pressure, and prevent the battery cell 102 from being damaged due to overpressure or even causing safety accidents.

[0062] In some embodiments, refer to Figure 1 and Figure 2 . The number of busbar units 200 is two, namely the first busbar unit 203 and the second busbar unit 204. These two busbar units are both installed at both ends on the top of the battery stack 100 and are symmetrically arranged.

[0063] Inside the first busbar unit 203 and the second busbar unit 204, there are multiple busbars 201 arranged closely adjacent to each other. The arrangement direction of the multiple busbars 201 is perpendicular to the arrangement direction of the multiple busbar units 200.

[0064] Specifically, the arrangement direction of the first busbar unit 203 is the horizontal direction. When the first busbar unit 203 is composed of multiple busbars 201, the arrangement direction of the multiple busbars 201 is perpendicular to the arrangement direction of the first busbar unit 203, that is, the multiple busbars 201 are vertically distributed in the first busbar unit 203.

[0065] Similarly, the arrangement direction of the second busbar unit 204 is also the horizontal direction. The second busbar unit 204 and the first busbar unit 203 are both installed at the two ends of the top of the battery stack 100, and the second busbar and the first busbar unit 203 are symmetrically distributed. When the second busbar unit 204 is also composed of multiple busbars 201, the arrangement direction of the multiple busbars 201 is perpendicular to the arrangement direction of the second busbar unit 204, that is, the multiple busbars 201 are vertically distributed in the second busbar unit 204.

[0066] On the top of the first busbar unit 203, on the side far from the second busbar unit 204, there are two special first limit blocks 205, which are respectively arranged at both ends of this side. Correspondingly, on the top of the second busbar unit 204, on the side far from the first busbar unit 203, there are also two similar second limit blocks 206, which are also arranged at both ends of this side. The function of the limit blocks (i.e., the first limit blocks 205 and the second limit blocks 206) on these two busbar units is exactly the same, both for restricting and stabilizing the position of the integrated circuit board assembly 300.

[0067] Specifically, in the structure of the busbar unit, each busbar unit is provided with limit blocks to ensure the structural stability and precise positioning of the components. On the top of the first busbar unit 203, on the side opposite to the second busbar unit 204, two first limit blocks 205 are installed. These two limit blocks are respectively located at both ends of this side, forming stable support points. Similarly, on the top of the second busbar unit 204, on the side opposite to the first busbar unit 203, two second limit blocks 206 are also configured, and they are also arranged at both ends of this side, corresponding to the first limit blocks 205.

[0068] These limit blocks jointly serve the purpose of limiting the integrated circuit board assembly 300, ensuring that it will not be displaced due to vibration or other external factors during operation, thereby making the overall structure of the battery module more compact and stable.

[0069] In some embodiments, refer to Figure 1 , Figure 2 and Figure 6 as shown. The bus bar 201 is provided with through holes 202 therein. The through holes 202 are used to penetrate the positioning posts 103. The main shape of the through holes 202 can be square, and the cross-sectional shape of the through holes 202 is the same as the cross-sectional shape of the corresponding positioning posts 103. The bus bar 202 passes through the positioning posts 103 through the through holes 202 and is fixed above the battery stack 100, so that the battery stack 100 plays a supporting role for the bus bar 201, thereby enabling the bus bar 201 to be stably connected to the battery cells 101.

[0070] The number of through holes in the bus bar 201 depends on its size and there are two cases. First, when the size of the bus bar 201 is large enough to accommodate and allow the setting of two through holes 202, the bus bar 201 will be equipped with two through holes 202. On the contrary, if the size of the bus bar 201 is small and only meets the condition of setting one through hole 202, then the bus bar 201 will only be equipped with one through hole 202.

[0071] Specifically, the bus bar 201 is internally designed with through holes 202, and the main function of these through holes 202 is to penetrate the positioning posts 103. The main shape of the through holes 202 is often selected as square to ensure matching with the cross-sectional shape of the positioning posts 103, thereby realizing stable through connection. After the bus bar 201 passes through the positioning posts 103 through the through holes 202, it is fixed above the battery stack 100. This design utilizes the battery stack 100 as a support structure, not only stabilizing the position of the bus bar 201, but also ensuring that the bus bar 201 can achieve stable and effective connection with the battery cells 101 below.

[0072] In addition, the number of through holes on the bus bar 201 is not fixed, but is determined according to its specific size. Specifically, when the size of the bus bar 201 is wide enough to easily accommodate and set two through holes 202, it will be configured with two through holes 202. On the contrary, if the size of the bus bar 201 is relatively compact and only meets the condition of setting one through hole 202, then it will only be equipped with one through hole 202.

[0073] In some embodiments, refer to Figure 1 , Figure 2 and Figure 6 as shown. The bus bars 201 are all arranged in the horizontal direction. When the bus bar 201 penetrates the positioning posts 103 through its corresponding through holes 202, the battery cells 101 located below the bus bar 201 adopt a vertical layout. This layout makes the battery cells 101 form a vertical relationship with the bus bar 201, that is, the battery cells 101 stand and are perpendicular to the plane of the bus bar 201.

[0074] Specifically, the busbar 201 is arranged along the horizontal direction. After the busbar 201 successfully penetrates through the positioning post 103 via the through-hole 202, a vertical corresponding relationship with the underlying battery cell 101 is formed. The battery cell 101 stands vertically below the busbar 201, perpendicular to the plane of the busbar 201. This layout not only optimizes space utilization but also enhances the structural stability and electrical performance conduction efficiency of the entire battery module.

[0075] In some embodiments, referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 as shown. The integrated circuit board assembly 300 includes a circuit board 301, a plug-in 302 connected to one short side of the circuit board 301, a plurality of terminals 303 located on the long side of the circuit board 301, and a buffer pad 304 located below the circuit board 301. The plurality of terminals 303 are arranged at intervals, with one end of each terminal 303 connected to the circuit board 301 and the other end of each terminal 303 connected to the busbar unit 200. The number of buffer pads 304 is at least two, and the two buffer pads 304 are arranged adjacent to each other along the short side direction of the circuit board.

[0076] The assembly sequence of the integrated circuit board assembly 300 is as follows: First, place the circuit board 301. Subsequently, place the plug-in 302 on one short side of the circuit board 301. Then, arrange a plurality of terminals 303 along the long side of the circuit board 301. One end of each terminal 303 is connected to the circuit board 301, and the other end is designed to be connected to the busbar unit 200. In addition, to protect the circuit board 301 from mechanical shock or vibration, at least two buffer pads 304 are provided below the integrated circuit board assembly 300. These buffer pads are arranged adjacent to each other along the short side direction of the circuit board, forming a stable support structure. They can absorb external impact forces, thereby protecting the circuit board 301 and the electronic components thereon from damage.

[0077] Based on the above battery module, an embodiment of the present application further proposes a battery pack, which includes the battery module described below. The battery module can be applied in the battery pack, enabling the battery pack to be used as a power battery.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery module, characterized in that, The battery module includes: A battery stack (100), the battery stack (100) includes battery cells (101), pole columns (102) are provided on the battery cells (101), and positioning columns (103) are provided at the tops of the pole columns (102); A bus bar unit (200), the bus bar unit (200) is fixed above the battery stack (100) through the positioning columns (103); An integrated circuit board assembly (300), which is located above the bus bar unit (200) and is fixedly connected to the bus bar unit (200).

2. The battery module according to claim 1, wherein The number of the bus bar units (200) is two; the two bus bar units (200) are symmetrically arranged at both ends of the top of the battery stack (100); A plurality of adjacent bus bars (201) are provided in each of the two bus bar units (200), and the plurality of bus bars (201) are fixedly connected to each other; The arrangement direction of the plurality of bus bars (201) is perpendicular to the arrangement direction of the plurality of bus bar units (200).

3. The battery module according to claim 2, wherein, A through hole (202) is provided in each bus bar (201); Each bus bar (201) passes through the positioning column (103) through the through hole (202) and is fixed above the battery stack (100).

4. The battery module according to claim 3, wherein The cross section of the pole column (102) is rectangular; the cross section of the positioning column (103) is square, and the cross section shape of the through hole (202) is the same as the cross section shape of the positioning column (103).

5. The battery module according to claim 2, characterized in that, A first limiting block (205) is provided on one side of the top of the first bus bar unit (203) away from the second bus bar unit (204); A second limiting block (206) is provided on one side of the top of the second bus bar unit (204) away from the first bus bar unit (203), and both the first limiting block (205) and the second limiting block (206) are used to limit the integrated circuit board assembly (300).

6. The battery module according to claim 5, wherein, The integrated circuit board assembly (300) includes a circuit board (301) and a plug-in (302) connected to a short side of one side of the circuit board (301).

7. The battery module according to claim 6, wherein The integrated circuit board assembly (300) further includes a plurality of terminals (303) located on the long side of the circuit board (301), and the plurality of terminals (303) are arranged at intervals; One ends of the plurality of terminals (303) are connected to the circuit board (301), and the other ends of the plurality of terminals (303) are connected to the bus bar unit (200).

8. The battery module according to claim 7, wherein, The integrated circuit board assembly (300) further includes a buffer pad (304) located between the circuit board (301) and the battery stack (100).

9. The battery module according to claim 8, wherein, The number of the buffer pads (304) is at least two, and the two buffer pads (304) are arranged adjacent to each other along the short side direction of the circuit board (301).

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

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