Battery module

Abstract

The utility model provides a battery module which comprises a plurality of first battery cells and a plurality of second battery cells electrically connected with the plurality of first battery cells, each first battery cell is provided with a first positive electrode end and a first negative electrode end, and each second battery cell is provided with a second positive electrode end and a second negative electrode end. Wherein each first battery cell comprises a first pressure release valve arranged at the first positive electrode end, each second battery cell comprises a second pressure release valve arranged at the second negative electrode end, and the first pressure release valves of the multiple first battery cells and the second pressure release valves of the multiple second battery cells are located on the same side of the battery module. The first pressure release valve and the second pressure release valve are designed on the same side of the battery module, so that the pressure release function can be realized only by designing the exhaust channel on one side, the design of the exhaust channel is relatively simple and convenient, and the space occupied by mounting two exhaust channels when the pressure release valves are positioned on the two sides of the battery module can be reduced; therefore, the available space in the battery module is increased.

Description

Technical Field

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

[0002] In common battery cells where the positive and negative terminals are located on opposite sides, the pressure relief valve is usually placed on the side closest to the positive or negative terminal. When multiple such cells are connected in series to form a battery module, multiple pressure relief valves are arranged at intervals on both sides of the battery module. When designing the exhaust channel for this battery module, it is necessary to design the multiple pressure relief valves located on both sides separately, which makes the design of the exhaust channel more complicated and occupies a lot of space. Utility Model Content

[0003] The present invention provides a battery module that can solve the problems of complicated exhaust channel design and large space occupation of the exhaust channel.

[0004] An embodiment of this utility model provides a clamp comprising: a plurality of first battery cells, each first battery cell having a first positive terminal and a first negative terminal; a plurality of second battery cells electrically connected to the plurality of first battery cells, each second battery cell having a second positive terminal and a second negative terminal; wherein, the first battery cell includes a first pressure relief valve disposed at the first positive terminal, the second battery cell includes a second pressure relief valve disposed at the second negative terminal, and the first pressure relief valves of the plurality of first battery cells and the second pressure relief valves of the plurality of second battery cells are located on the same side of the battery module.

[0005] In one embodiment, the first positive terminal and the first negative terminal are arranged opposite each other, and the second positive terminal and the second negative terminal are arranged opposite each other.

[0006] In one embodiment, the battery module further includes a housing, in which a plurality of first battery cells and a plurality of second battery cells are installed; wherein, the housing is provided with mounting holes for installing a pressure relief valve, the pressure relief valve being connected to a first pressure relief valve and a second pressure relief valve.

[0007] In one embodiment, the housing includes a base plate and a first side plate connected to the base plate. The first side plate is located on one side of a plurality of first cells and a plurality of second cells and is provided with mounting holes.

[0008] In one embodiment, the housing further includes a support plate located below the pressure relief hole, the first pressure relief valve, and the second pressure relief valve.

[0009] In one embodiment, the housing includes a second side plate connected to the base plate and facing the first and second pressure relief valves, and a support plate is bent and connected to the second side plate.

[0010] In one embodiment, a gap is provided between the end of the support plate away from the second side plate and the first and second battery cells.

[0011] In one embodiment, the gap is greater than 50 mm.

[0012] In one embodiment, the first battery cell further includes a first positive terminal disposed at the first positive terminal, and the second battery cell further includes a second negative terminal disposed at the second negative terminal, with the support plate located between the first pressure relief valve and the first positive terminal, and the second pressure relief valve and the second negative terminal.

[0013] In one embodiment, an insulating layer is provided at the end of the support plate away from the second side plate.

[0014] This utility model provides a battery module, which includes multiple first cells and multiple second cells electrically connected to the multiple first cells. Each first cell has a first positive terminal for setting a positive electrode and a first negative terminal for setting a negative electrode. Each second cell has a second positive terminal for setting a positive electrode and a second negative terminal for setting a negative electrode. Each first cell has a first pressure relief valve for releasing internal pressure, and each second cell has a second pressure relief valve for releasing internal pressure. The first pressure relief valve is located at the first positive terminal of the first cell, and the second pressure relief valve is located at the second positive terminal of the second cell. In the battery module formed by connecting multiple first cells and multiple second cells in series and parallel, the first pressure relief valve of the multiple first cells and the second pressure relief valve of the multiple second cells are located on the same side of the battery module. The battery module provided in this embodiment designs the first pressure relief valve and the second pressure relief valve on the same side of the battery module, so that only one exhaust channel needs to be designed on this side, and the exhaust channel can be connected to the first pressure relief valve and the second pressure relief valve. Therefore, the design is relatively simple and can reduce the space occupied by installing two exhaust channels when the pressure relief valve is located on both sides of the battery module. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the battery module provided in this embodiment of the utility model;

[0017] Figure 2 yes Figure 1 A schematic diagram of the battery module from another perspective;

[0018] Figure 3 yes Figure 1 Front view of the battery module;

[0019] Figure 4This is a schematic diagram of the structure of the battery module provided in this embodiment of the utility model;

[0020] Figure 5 yes Figure 4 Side view of the battery module;

[0021] Explanation of reference numerals in the attached figures:

[0022] 100. Battery module; 110. First cell; 111. First positive terminal; 112. First negative terminal; 113. First pressure relief valve; 120. Second cell; 121. Second negative terminal; 122. Second positive terminal; 123. Second pressure relief valve; 130. Housing; 131. Mounting hole; 132. Base plate; 133. First side plate; 134. Support plate; 135. Second side plate; 136. Gap. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0024] To address the issues of cumbersome exhaust channel design and significant space occupation in related technologies, this utility model provides a battery module 100. Please refer to... Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of the battery module 100 provided in this embodiment of the utility model. Figure 2 yes Figure 1 A structural schematic diagram of the battery module 100 from another perspective. Figure 3 yes Figure 1 A front view of the battery module 100. The battery module 100 includes a plurality of first cells 110 and a plurality of second cells 120. The first cells 110 have a first positive terminal for setting a first positive terminal 111 and a first negative terminal for setting a first negative terminal 112. The second cells 120 have a second positive terminal for setting a second positive terminal 122 and a second negative terminal for setting a second negative terminal 121.

[0025] The first battery cell 110 is equipped with a first pressure relief valve 113 for releasing internal pressure, and the second battery cell 120 is equipped with a second pressure relief valve 123 for releasing internal pressure. The first pressure relief valve 113 is located at the first positive terminal of the first battery cell 110, and the second pressure relief valve 123 is located at the second positive terminal of the second battery cell 120. In the battery module 100 formed by multiple first battery cells 110 and multiple second battery cells 120 connected in series, the first pressure relief valves 113 of the multiple first battery cells 110 and the second pressure relief valves 123 of the multiple second battery cells 120 are located on the same side of the battery module 100. In this embodiment, the first pressure relief valve 113 and the second pressure relief valve 123 are designed on the same side of the battery module 100, so that only one exhaust channel needs to be designed on this side. This exhaust channel can connect to the first pressure relief valve 113 and the second pressure relief valve 123. Therefore, the design is simpler and can reduce the space occupied by installing two exhaust channels.

[0026] Furthermore, through the first cell 110 and the second cell 120 in this embodiment, it can be ensured that during the assembly process, multiple first cells 110 and multiple second cells 120 are combined in different series and parallel ways, and the pressure relief valve of the battery is located on the same side of the battery module 100, so that the battery module 100 can be used for a variety of different series and parallel connection methods.

[0027] In some embodiments, please refer to Figure 1 , Figure 2 The first positive and first negative terminals of the first cell 110 are arranged opposite each other, and the second positive and second negative terminals of the second cell 120 are arranged opposite each other, that is, the first positive terminal and the first negative terminal, and the second positive terminal and the second negative terminal are positioned opposite each other. Through this design, in this embodiment, the first cell 110 and the second cell 120 can transfer current from one end to the opposite end during operation, thereby allowing the electrolyte inside the cell to undergo a more complete chemical reaction. Furthermore, this structural design ensures a relatively regular arrangement of the terminals of the first cell 110 and the second cell 120, making it easier to install a connector for series connection when multiple first cells 110 and multiple second cells 120 are connected in series.

[0028] In some embodiments, please refer to Figure 4 , Figure 4 This is a schematic diagram of the structure of the battery module 100 provided in this embodiment of the present utility model. The battery module 100 also includes a housing 130, and a plurality of first cells 110 and a plurality of second cells 120 are installed in the housing 130.

[0029] The housing 130 is provided with a mounting hole 131 for mounting a pressure relief valve. The pressure relief valve monitors the gas pressure inside the battery and automatically opens when the pressure exceeds a set value to release excess gas. During battery use, such as charging or discharging, the cells may generate gas due to chemical reactions or other reasons. If this gas cannot be effectively discharged, it will cause the internal pressure of the battery pack to rise, potentially leading to safety problems such as battery expansion, leakage, or even explosion. The design of the mounting hole 131 ensures that the pressure relief valve can be securely mounted on the housing 130. The pressure relief valve is connected to the first pressure relief valve 113 of the first cell 110 and the second pressure relief valve 123 of the second cell 120, allowing gas to be smoothly discharged from inside the cell through the pressure relief valve, effectively preventing excessive internal pressure in the battery module 100 and thus reducing the risk of battery safety accidents.

[0030] In some embodiments, please refer to Figure 4 The housing 130 includes a base plate 132 located below the battery module 100 for supporting the battery module 100, and also includes a first side plate 133 connected to the base plate 132. The first side plate 133 is located on one side of a plurality of first cells 110 and a plurality of second cells 120, and is provided with a mounting hole 131 for installing a pressure relief valve.

[0031] Specifically, when the first cell 110 and the second cell 120 experience thermal runaway, high-temperature gases are first released from the first pressure relief valve 113 and the second pressure relief valve 123. However, in addition to high-temperature gases, thermal runaway may also lead to the decomposition and evaporation of materials inside the battery, a reaction that may be accompanied by the ejection of solid residue. Particles of solid residue may be ejected from the first pressure relief valve 113 and the second pressure relief valve 123 along with the high-temperature gases. Since the density of solid residue is greater than that of gas, it will gradually fall during ejection due to gravity. In this embodiment, by designing the mounting hole 131 on the first side plate 133 of the housing 130 instead of the bottom plate 132, this design effectively reduces the risk of solid residue entering the pressure relief valve. Specifically, the position of the mounting hole 131 can effectively guide the solid residue to fall to the bottom of the housing 130 under gravity, rather than entering the pressure relief valve located in the mounting hole 131. This design not only ensures the stability of the pressure relief valve but also further improves the overall safety and reliability of the battery module 100.

[0032] In some embodiments, please refer to Figure 4The housing 130 also includes a support plate 134, which is located below the pressure relief hole, the first pressure relief valve 113, and the second pressure relief valve 123. In this embodiment, the support plate 134 is designed below the first pressure relief valve 113 and the second pressure relief valve 123. The main purpose of this design is to ensure that solid residue ejected from the two pressure relief valves is effectively blocked on the support plate 134 in the event of thermal runaway of the first battery cell 110 and the second battery cell 120. This design effectively prevents conductive materials that may be present in the solid residue from contacting other electronic components of the battery module 100, thereby reducing the potential safety risks caused by short circuits. Simultaneously, positioning the support plate 134 below the pressure relief hole allows it to block high-temperature gases released from the first pressure relief valve 113 and the second pressure relief valve 123 during the pressure relief process. Upon contact with the support plate 134, these gases change their flow direction and diffuse towards the pressure relief valves. This change in gas flow helps to quickly disperse and reduce gas pressure, thereby enhancing the efficiency of the pressure relief valve and enabling it to reduce the internal pressure of the battery module 100 more quickly in the event of thermal runaway.

[0033] In some embodiments, please refer to Figure 4 The housing 130 includes not only the first side plate 133 and the bottom plate 132 described above, but also a second side plate 135 connected to the bottom plate 132 and facing the first pressure relief valve 113 and the second pressure relief valve 123. A support plate 134 is bent and connected to the second side plate 135. Specifically, when the first battery cell 110 and the second battery cell 120 experience thermal runaway, the solid residue ejected from the first pressure relief valve 113 and the second pressure relief valve 123 will be affected by the gas flow, and most of it will move towards the oppositely positioned second side plate 135. In this embodiment, the support plate 134 is designed on the second side plate 135 opposite to the first pressure relief valve 113 and the second pressure relief valve 123. This allows the support plate 134 to effectively block these solid residues, thereby preventing them from directly contacting other electronic components in the battery module 100. In this way, the support plate 134 can effectively prevent conductive materials that may be present in the solid residue from coming into contact with other components of the battery module 100, thereby avoiding the risk of short circuit and enhancing the safety of the battery module 100.

[0034] In some embodiments, please refer to Figure 4 , Figure 5 , Figure 5 yes Figure 4In a side view of the battery module 100, a gap 136 is provided between the end of the support plate 134 away from the second side plate 135 and the first battery cell 110 and the second battery cell 120. Specifically, when the working power of the pressure relief valve is constant, if the first battery cell 110 and the second battery cell 120 experience thermal runaway, and a large amount of gas is ejected from the first pressure relief valve 113 and the second pressure relief valve 123, the pressure relief valve cannot effectively discharge all the gas in a short time. This can lead to excessive pressure inside the battery module 100, posing a safety hazard. In this embodiment, a gap 136 is provided between the end of the support plate 134 away from the second side plate 135 and the first battery cell 110 and the second battery cell 120. This gap 136 allows the spaces on the upper and lower sides of the support plate 134 to communicate with each other. When the gas concentration is high in the space near the first pressure relief valve 113 and the second pressure relief valve 123 on the support plate 134 and the pressure relief valve cannot release the gas in time, the gas can diffuse through the gap 136 to the space away from the pressure relief valve on the support plate 134. This gas diffusion effectively reduces the internal pressure of the battery module 100, minimizing potential safety issues caused by gas accumulation and thus improving the overall safety of the battery module 100. This design ensures that even if the pressure relief valve cannot release the gas in time, the internal gas can diffuse through the gap 136 to other areas, thereby reducing the internal pressure of the battery module 100 and further enhancing the safety of the battery module 100.

[0035] In some embodiments, please refer to Figure 5 The width d of the gap 136 between the end of the support plate 134 away from the second side plate 135 and the first battery cell 110 and the second battery cell 120 is greater than 50 mm. Experiments have shown that setting the width d of the gap 136 to be greater than 50 mm allows the gas instantaneously ejected from the first pressure relief valve 113 and the second pressure relief valve 123 to diffuse through the gap 136 to the space on the other side of the support plate 134 away from the first pressure relief valve 113 and the second pressure relief valve 123 when thermal runaway occurs in the first battery cell 110 and the second battery cell 120, thereby reducing the pressure inside the battery module 100.

[0036] In some embodiments, the first battery cell 110 further includes a first positive terminal disposed at the first positive terminal, and the second battery cell 120 further includes a second negative terminal disposed at the second negative terminal. A support plate 134 is located between the first pressure relief valve 113 and the first positive terminal, and between the second pressure relief valve 123 and the second negative terminal. In this embodiment, the support plate 134 is disposed between the first pressure relief valve 113 and the first positive terminal, and between the second pressure relief valve 123 and the second negative terminal. This arrangement can largely prevent solid substances from being instantaneously ejected from the first pressure relief valve 113 and the second pressure relief valve 123 when the first battery cell 110 and the second battery cell 120 experience thermal runaway, thus preventing the ejected solid substances from contacting the first positive terminal or the second negative terminal and causing a short circuit.

[0037] In some embodiments, an insulating layer is provided at the end of the support plate 134 away from the second side plate 135. In this embodiment, an insulating layer is provided at the end of the support plate 134 away from the second side plate 135. The insulating layer prevents current flow when the first cell 110 or the second cell 120 comes into direct contact with the support plate 134 under certain circumstances. Specifically, when the cell comes into contact with the support plate 134, the insulating layer effectively blocks the current, thereby ensuring that the first positive terminal of the first cell 110 or the second negative terminal of the second cell 120 does not come into direct contact with the conductive parts inside the support plate 134. This design significantly reduces the risk of short circuit in the battery module 100, avoids potential dangers such as overheating or fire caused by short circuit, and thus ensures the safety of the battery module 100.

[0038] This utility model provides a battery module 100, which includes a plurality of first battery cells 110 and a plurality of second battery cells 120 electrically connected to the plurality of first battery cells 110. Each first battery cell 110 has a first positive terminal for setting a positive electrode and a first negative terminal for setting a negative electrode. Each second battery cell 120 has a second positive terminal for setting a positive electrode and a second negative terminal for setting a negative electrode. The first battery cell 110 is provided with a first pressure relief valve 113 for releasing internal pressure, and each second battery cell 120 is provided with a second pressure relief valve 123 for releasing internal pressure. The first pressure relief valve 113 is located at the first positive terminal of the first battery cell 110, and the second pressure relief valve 123 is located at the second positive terminal of the second battery cell 120. In a battery module 100 formed by connecting multiple first cells 110 and multiple second cells 120 in series and parallel, the first pressure relief valve 113 of the multiple first cells 110 and the second pressure relief valve 123 of the multiple second cells 120 are located on the same side of the battery module 100. The battery module 100 provided in this embodiment, by designing the first pressure relief valve 113 and the second pressure relief valve 123 on the same side of the battery module 100, only needs to be designed with one exhaust channel on that side. This exhaust channel can connect to both the first pressure relief valve 113 and the second pressure relief valve 123. Therefore, the design is simpler and reduces the space occupied by installing two exhaust channels when the pressure relief valves are located on both sides of the battery module 100. Furthermore, through the first cell 110 and the second cell 120 in this embodiment, it can be ensured that during the assembly process, multiple first cells 110 and multiple second cells 120 are combined in different series and parallel ways, and the pressure relief valve of the battery is located on the same side of the battery module 100, so that the battery module 100 can be used for a variety of different series and parallel connection methods.

[0039] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery module, characterized in that, include: Multiple first cells, each first cell having a first positive terminal and a first negative terminal; Multiple second cells are electrically connected to multiple first cells, and each second cell has a second positive terminal and a second negative terminal; The first battery cell includes a first pressure relief valve disposed at the first positive terminal, and the second battery cell includes a second pressure relief valve disposed at the second negative terminal. The first pressure relief valves of the plurality of first battery cells and the second pressure relief valves of the plurality of second battery cells are located on the same side of the battery module. A housing, in which a plurality of first battery cells and a plurality of second battery cells are installed; wherein, the housing is provided with mounting holes for installing pressure relief valves, the pressure relief valves being connected to the first pressure relief valves and the second pressure relief valves.

2. The battery module according to claim 1, characterized in that, The first positive terminal and the first negative terminal are positioned opposite each other, and the second positive terminal and the second negative terminal are positioned opposite each other.

3. The battery module according to claim 1, characterized in that, The housing includes a base plate and a first side plate connected to the base plate. The first side plate is located on one side of a plurality of first battery cells and a plurality of second battery cells, and is provided with the mounting holes.

4. The battery module according to claim 3, characterized in that, The housing also includes a support plate located below the mounting hole, the first pressure relief valve, and the second pressure relief valve.

5. The battery module according to claim 4, characterized in that, The housing includes a second side plate connected to the base plate and facing the first pressure relief valve and the second pressure relief valve, and a support plate is bent and connected to the second side plate.

6. The battery module according to claim 5, characterized in that, A gap is provided between the end of the support plate away from the second side plate and the first battery cell and the second battery cell.

7. The battery module according to claim 6, characterized in that, The gap is greater than 50mm.

8. The battery module according to claim 4, characterized in that, The first battery cell further includes a first positive terminal disposed at the first positive terminal, and the second battery cell further includes a second negative terminal disposed at the second negative terminal. The support plate is located between the first pressure relief valve and the first positive terminal, and between the second pressure relief valve and the second negative terminal.

9. The battery module according to claim 6, characterized in that, An insulating layer is provided at the end of the support plate away from the second side plate.

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