Battery module

Abstract

The utility model discloses a battery module. The battery module comprises a battery cell assembly, a bus assembly and a BMS (Battery Management System) assembly, the battery cell assembly comprises a plurality of square-shell battery cells, the bus assembly comprises a PC sheet, a plurality of bus bars and a plurality of acquisition lines, and the bus bars and the acquisition lines are integrally arranged on the PC sheet; the bus-bar assembly covers the top of the battery cell assembly; the bus-bars are electrically connected with the pole columns of the square-shell battery cells respectively and are used for sequentially connecting the plurality of square-shell battery cells in series; the BMS assembly is arranged above the busbar assembly, and the BMS assembly is electrically connected with the busbar through the acquisition line. The battery module is convenient to install and good in safety performance, internal collision and short circuit are avoided, the temperature of the confluence assembly is also prevented from being too high, and the service life of the battery module is effectively prolonged.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery module. Background Technology

[0002] Battery modules are a crucial component of new energy technologies. Compared to pouch cells, prismatic cells offer higher safety performance. Therefore, efficient utilization of prismatic cells is a major industry trend. Currently, the main assembly methods for prismatic cells are steel strip binding and end-side plate welding. However, during the binding process, the binding force can damage the cell casing. This can lead to damage to the battery module upon impact, resulting in decreased battery performance or even safety accidents. Furthermore, it can easily cause short circuits in components such as cells, busbars, and connectors, severely impacting the battery module's lifespan and increasing the risk of fire or explosion.

[0003] Therefore, a safe, reliable, and easy-to-install battery module is needed. Utility Model Content

[0004] The purpose of this invention is to provide a battery module that overcomes the aforementioned defects in the prior art.

[0005] The technical solution to achieve the purpose of this utility model is: a battery module, including a cell assembly, a busbar assembly, and a BMS (Battery Management System) assembly; the cell assembly includes multiple prismatic cells arranged in an array, the busbar assembly includes a PC sheet, multiple busbars, and multiple data acquisition lines, the busbars and data acquisition lines are integrally disposed on the PC sheet; the busbar assembly covers the top of the cell assembly, the busbars are electrically connected to the terminals of the prismatic cells respectively and the multiple prismatic cells are connected in series; the BMS assembly is disposed above the busbar assembly, and the BMS assembly and the busbars are electrically connected through the data acquisition lines.

[0006] In a preferred embodiment, the PC sheet is a thin sheet made of polycarbonate material.

[0007] In a preferred embodiment, the busbar is bonded to the PC sheet, and a voltage probe and a temperature probe are fixedly disposed above the busbar. The voltage probe and the temperature probe are electrically connected to the BMS component through the acquisition line, respectively.

[0008] In a preferred embodiment, the square-shell battery cell is provided with a pressure relief valve, and the PC sheet is provided with an opening of a corresponding shape above the pressure relief valve.

[0009] As a preferred implementation, the output position of the busbar is fixedly provided with a corresponding terminal post, and the bottom of the terminal post is provided with a reinforcing bottom plate fixed below the corresponding busbar.

[0010] As a preferred implementation, the busbar assembly and the BMS assembly are fixedly provided with an EVA elastic fixing block.

[0011] With the above technical scheme, the utility model has the following beneficial effects:

[0012] (1) The utility model discloses a battery module, and the busbar assembly is designed integrally, the busbar assembly is divided into PC sheet, busbar and collection line, the PC sheet is used as a carrier to integrate the busbar and collection line and is assembled conveniently, automatic production can be realized, manual cost can be reduced and efficiency can be improved.

[0013] (2) The utility model discloses a PC sheet made of polycarbonate material, which also has a protection function, divides the battery cell and the busbar, avoids direct contact to cause short circuit risk, has better safety performance, and is more convenient to process.

[0014] (3) The utility model discloses that the busbar is bonded on the PC sheet, and the collection line is fixed on the PC sheet, so as to avoid the collection line intersection, standard and beautiful wiring, and reduce the short circuit risk; the busbar is provided with the probe of the collection line, and information such as voltage and temperature is collected respectively, so that each battery cell node is in the monitoring range, and the risk of thermal runaway is prevented.

[0015] (4) The utility model discloses that the PC sheet is provided with a corresponding shape opening at the position of the battery cell pressure relief valve, so as to avoid blocking the pressure relief of the battery cell and ensure the safety during use of the battery cell.

[0016] (5) The utility model discloses that the output position of the busbar is provided with a corresponding terminal post, and the terminal post is provided with a bottom plate.

[0017] (6) The utility model discloses that the busbar assembly and the BMS assembly are fixedly provided with an EVA elastic fixing block, so as to avoid that the BMS assembly transmits high temperature to the busbar assembly during operation to cause overheating of the busbar assembly, and the service life of the busbar assembly is improved. DETAILED DESCRIPTION

[0018] In order to make the content of the utility model more easily understood clearly, the utility model is further explained in detail below according to specific embodiments and in combination with the drawings, wherein

[0019] Figure 1 It is a perspective view of a battery module.

[0020] Figure 2It is a perspective view of the cell assembly.

[0021] Figure 3 It is a perspective view of the busbar assembly.

[0022] Figure 4 It is an exploded view of the busbar assembly.

[0023] The reference signs in the drawings are: 1, cell assembly, 1-1, square cell, 2, busbar assembly, 2-1, PC sheet, 2-2, busbar, 2-3, collection line, 2-4, voltage probe, 2-5, temperature probe, 2-6, terminal post, 2-7, reinforced bottom plate; 3, BMS assembly; 4, EVA elastic fixing block. DETAILED DESCRIPTION

[0024] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings in the specification and specific embodiments.

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0027] It should be noted that: similar reference signs and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] In the description of the embodiments of the present application, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0029] In the description of the embodiments of the utility model, still need explaining, unless another explicit provision and limitation, term " set ", " install ", " link ", " connect " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be direct connection, also can be indirectly connected through the intermediate medium, can be two element inside the communication. For ordinary skilled person in the art, the above-mentioned terms can be understood in the utility model according to specific circumstances. The utility model is further described below in conjunction with the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the utility model, and cannot limit the protection scope of the utility model.

[0030] (Embodiment)

[0031] See Figure 1 A battery module, comprising a cell assembly 1, a busbar assembly 2 and a BMS assembly 3. The busbar assembly 2 is arranged above the cell assembly 1, and the BMS assembly 3 is arranged above the busbar assembly 2.

[0032] See Figure 2 The cell assembly 1 comprises four square can cells 1-1 arranged in sequence from left to right, the four square can cells 1-1 are fixed together by two steel belts, and the positive and negative poles of adjacent square can cells 1-1 are reversely arranged. The square can cells 1-1 are each provided with a pressure relief valve above.

[0033] See Figure 3 The busbar assembly 2 comprises a PC sheet 2-1, eight busbars 2-2 and a plurality of collection lines 2-3. The PC sheet 2-1 is a sheet made of polycarbonate material, and the busbars 2-2 and the collection lines 2-3 are integrally arranged on the PC sheet 2-1; the PC sheet 2-1 covers the top of the cell assembly 1, and the eight busbars 2-2 on the PC sheet 2-1 are divided into two rows, corresponding to one pole of the four square can cells 1-1 respectively. The busbars on the positive pole of the leftmost square can cell 1-1 and the negative pole of the rightmost square can cell 1-1 are each fixedly provided with a terminal post 2-6. The busbars on the negative pole of the square can cell 1-1 and the busbars on the positive pole of the adjacent right square can cell 1-1 are fixedly connected two by two, so as to connect the four square can cells 1-1 in series. The PC sheet is a sheet made of polycarbonate material, which also plays a protective role, divides the cell and the busbar, avoids direct contact to cause short circuit risk, has better safety performance, and is more convenient to process.

[0034] Further, the busbars 2-2 are all bonded on the PC sheet 2-1, and a voltage probe 2-4 and a temperature probe 2-5 are fixedly arranged above the busbars 2-2, and the voltage probe 2-4 and the temperature probe 2-5 are electrically connected with the BMS assembly 3 through a collection line 2-3 respectively. The voltage and temperature information are collected respectively, so that each battery cell node is in the monitoring range, and the risk of thermal runaway is prevented. The PC sheet 2-1 is provided with a plurality of small holes arranged in pairs, and the collection line 2-3 is bundled on the PC sheet through the small holes on the PC sheet 2-1, so as to avoid the intersection of the collection lines, standardize the wiring, make the appearance beautiful, and reduce the risk of short circuit.

[0035] Further, the PC sheet 2-1 is provided with an opening hole corresponding to the shape above the pressure relief valve of the square shell battery cell 1-1, so as to avoid blocking the pressure relief of the battery cell and ensure the safety of the battery cell in use.

[0036] Further, as shown in Figure 4 , the terminal post 2-6 is provided with a reinforcing bottom plate 2-7 at the bottom, and the reinforcing bottom plate 2-7 is fixed below the corresponding busbar 2-2. The terminal post is designed with a bottom plate. It is used to strengthen the busbar and prevent the busbar from being deformed due to excessive screwing torque during wiring.

[0037] Further, an EVA elastic fixing block 4 is fixedly arranged between the busbar assembly 2 and the BMS assembly 3. The BMS assembly 3 is an electronic control system for monitoring and managing the performance of the battery pack, which can measure the voltage of each square shell battery cell 1-1 to ensure that all square shell battery cells 1-1 work within a safe range; it can also monitor the temperature of the battery to prevent overheating or overcooling and prolong the service life of the battery. Through real-time monitoring and control, the BMS assembly 3 can prevent potential dangers such as battery overheating and short circuit, and improve the overall safety of the system. The EVA elastic fixing block is fixedly arranged between the busbar assembly and the BMS assembly, which not only avoids the mutual collision between the busbar assembly 2 and the BMS assembly 3, but also avoids the high temperature of the BMS assembly during operation from being transmitted to the busbar assembly to cause the busbar assembly to overheat, thereby prolonging the service life of the busbar assembly.

[0038] The battery module of the embodiment adopts an integrated design, the busbar assembly is integrated with the busbar, the collection line and the like through the PC sheet as a carrier, which is convenient to assemble and can realize automatic production, thereby reducing labor cost and improving efficiency. And through the series connection of a plurality of square shell battery cells, a higher voltage is achieved. The device has better safety performance, avoids internal collision and short circuit, and also avoids the temperature of the busbar assembly being too high, thereby effectively prolonging the service life of the battery module.

[0039] The above-described specific embodiments further specifically describe the purposes, technical solutions and beneficial effects of the present application, and it should be understood that the above-described specific embodiments are merely examples of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A battery module, characterized by: It includes an electric core assembly (1), a confluence assembly (2) and a BMS assembly (3); the electric core assembly (1) includes a plurality of square shell electric cores (1-1) arranged, the confluence assembly (2) includes a PC sheet (2-1), a plurality of confluence bars (2-2) and a plurality of collection lines (2-3), the confluence bar (2-2) and the collection line (2-3) are integrally arranged on the PC sheet (2-1); the confluence assembly (2) covers the top of the electric core assembly (1), the plurality of confluence bars (2-2) are respectively electrically connected with the pole of the square shell electric core (1-1) and sequentially connect the plurality of square shell electric cores (1-1); the BMS assembly (3) is arranged above the confluence assembly (2), and the BMS assembly (3) and the confluence bar (2-2) are electrically connected through the collection line (2-3).

2. The battery module of claim 1, wherein: The PC sheet (2-1) is a sheet made of polycarbonate material.

3. The battery module of claim 2, wherein: The confluence bar (2-2) is bonded on the PC sheet (2-1), and a voltage probe (2-4) and a temperature probe (2-5) are fixedly arranged above the confluence bar (2-2), and the voltage probe (2-4) and the temperature probe (2-5) are respectively electrically connected with the BMS assembly (3) through the collection line (2-3).

4. The battery module of claim 2, wherein: The square shell electric core (1-1) is provided with a pressure relief valve, and the PC sheet (2-1) is provided with an opening hole with a corresponding shape above the pressure relief valve.

5. The battery module of claim 3, wherein: The output position of the confluence bar (2-2) is fixedly provided with a corresponding terminal post (2-6), and the bottom of the terminal post (2-6) is provided with a reinforcing bottom plate (2-7), and the reinforcing bottom plate (2-7) is fixed below the corresponding confluence bar (2-2).

6. The battery module of claim 1, wherein: The EVA elastic fixing block (4) is fixedly arranged between the confluence assembly (2) and the BMS assembly (3).

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