Battery module

Abstract

A battery module belongs to the technical field of battery modules. The battery pack comprises a liquid cooling plate, a battery module and a shell, the battery module comprises two end plates and a plurality of battery cells arranged between the two end plates, an insulating frame is arranged between every two adjacent battery cells, a heat dissipation opening is formed in the middle of each insulating frame, a plurality of limiting strips are arranged on the liquid cooling plate, and one battery module is arranged between every two adjacent limiting strips. Heat-conducting glue is arranged between the battery module and the liquid cooling plate, and the shell is connected to the outer side of the limiting strip on the liquid cooling plate. According to the utility model, local high temperature in the battery module can be effectively avoided, and the heat dissipation performance and the use safety are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of battery modules, and in particular to a battery module. Background Art

[0002] A battery module is generally composed of multiple battery modules, each of which contains multiple battery cells. Therefore, the battery module can provide a large output power, but it also generates a large amount of heat. Therefore, in order to ensure the safety of the battery module, its heat dissipation performance needs to be improved. In the prior art, for example, Chinese utility model patent No. ZL202322359736.5 discloses a high-efficiency circulating liquid cooling and heat dissipation energy storage battery module. A liquid cooling and heat dissipation module is provided at the bottom of the battery pack inside the battery module. The liquid cooling and heat dissipation module includes a liquid cooling plate and a liquid cooling frame. The liquid cooling frame is shaped like a rectangular shell. A battery support edge is provided in an annular shape on the inner side of the liquid cooling frame. A liquid cooling plate is provided on the bottom of the liquid cooling frame. A cold plate support edge is provided on the front side of the liquid cooling frame. The cold plate support edge is provided through the front side of the liquid cooling frame. A liquid cooling plate with a circulation port on one side is provided above the cold plate support edge. The liquid cooling plate is plug-in and provided inside the liquid cooling frame.

[0003] Existing battery modules all use liquid cooling to improve heat dissipation efficiency, but it can only dissipate heat from the sides of the battery module. Local high temperatures may still occur inside the battery module, and the heat dissipation performance and safety need to be improved. Utility Model Content

[0004] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and to provide a battery module that can effectively avoid local high temperature generation inside the battery module, thereby ensuring heat dissipation performance and safety in use.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A battery module includes a liquid cooling plate, a battery module, and a shell. The battery module includes two end plates and a plurality of battery cells arranged between the two end plates. An insulating frame is provided between adjacent battery cells, and a heat dissipation vent is provided in the middle of the insulating frame. A plurality of limit strips are provided on the liquid cooling plate, and a battery module is provided between adjacent limit strips. Thermal conductive glue is provided between the battery module and the liquid cooling plate, and the shell is connected to the outer side of the limit strip on the liquid cooling plate.

[0007] Preferably, a battery connecting piece is provided on a plurality of battery cells of the battery module, a plurality of temperature sensors are provided on the battery connecting piece, and each temperature sensor is attached to a battery cell.

[0008] Preferably, the battery connecting piece includes a flexible circuit board and aluminum bars that connect the positive and negative electrodes of adjacent battery cells in series, and a nickel sheet is welded between each aluminum bar and the flexible circuit board.

[0009] Preferably, the edge of the shell is provided with a flange, a shell sealing ring is provided between the flange and the liquid cooling plate, a flange pressure strip is provided on the upper side of the flange, and the flange pressure strip and the liquid cooling plate are fastened by screws.

[0010] Preferably, two hanging brackets are provided on two opposite edges of the liquid cooling plate.

[0011] Preferably, a fixing bracket is provided on both sides of the front end of the liquid cooling plate, and two rivet nuts are provided on the fixing bracket.

[0012] Preferably, two positioning steps are provided on the liquid cooling plate, and the two end plates are fixedly connected to one positioning step respectively by bolts.

[0013] Preferably, the front side of the shell is provided with an opening, a panel bracket is provided at the opening, and the panel bracket is provided with positive and negative connectors, a manual maintenance switch, a fire nozzle, an explosion-proof valve, a fire composite detector, and a communication connector.

[0014] Preferably, a panel sealing ring is provided between the panel bracket and the shell, and a panel pressure strip is provided on the panel sealing ring.

[0015] Preferably, a water inlet and a water outlet are provided at the front end of the liquid cooling plate.

[0016] The advantages of the utility model are:

[0017] 1. By designing heat dissipation spaces between adjacent battery cells and adjacent battery modules, and using thermally conductive adhesive to ensure the thermal conductivity between the battery module and the liquid cold plate, the overall heat dissipation performance of the battery module is effectively improved, thereby enhancing the safety of use;

[0018] 2. Monitor the temperature status of each battery cell through the temperature sensor on the battery connector to detect abnormal battery cell temperature in time and eliminate safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of an exploded structure of a battery module provided in an embodiment of this specification;

[0020] Figure 2 A schematic diagram of the structure of the liquid cooling plate provided in the embodiments of this specification;

[0021] Figure 3 A schematic diagram of the structure of a battery module provided in an embodiment of this specification;

[0022] Figure 4 A schematic diagram of the structure of a battery connector provided in an embodiment of this specification;

[0023] Figure 5 A schematic diagram of the structure of a fixing bracket provided in an embodiment of this specification;

[0024] In the picture:

[0025] 3-battery connector; 301-flexible circuit board; 302-aluminum busbar; 303-nickel sheet; 304-positive output aluminum busbar; 305-negative output aluminum busbar; 4-steel belt; 7-battery cell; 8-insulation frame; 10-end plate; 13-lifting bracket; 14-fixing bracket; 141-rivet nut; 142-reinforcement rib; 15-flanged edge strip; 16-housing; 17-housing sealing ring; 18-battery module; 19-panel bracket; 2 1-Positive connector; 22-Negative connector; 23-Top cover; 24-Manual maintenance switch; 25-Panel pressure strip; 26-Front panel; 27-Fire nozzle; 28-Explosion-proof valve; 29-Fire composite detector; 30-Panel sealing ring; 31-Communication connector; 34-Liquid cooling plate; 341-Limiting strip; 342-Positioning step; 343-Water inlet; 344-Water outlet; 35-Thermal conductive adhesive; 36-Battery management system. DETAILED DESCRIPTION

[0026] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods.

[0027] like Figure 1 and 2 As shown, this embodiment provides a battery module, including a liquid cooling plate 34, a battery module 18, and a shell 16. There are four battery modules 18, which are arranged on the liquid cooling plate 34. The shell 16 covers the four battery modules 18 to protect the battery modules. Among them, five limiting bars 341 are arranged at intervals on the liquid cooling plate 34, and the four battery modules 18 are arranged in sequence between adjacent limiting bars 341. At the same time, the shell 16 is connected to the outside of the limiting bars on the liquid cooling plate 34, that is, there is also a distance of the width of a limiting bar between the shell 16 and the battery modules 18 on the side. Therefore, there is a certain heat dissipation space between adjacent battery modules 18, as well as between the battery modules on the side and the shell 16, which can effectively avoid the occurrence of local high temperature. The battery module and the liquid cooling plate 34 are seamlessly bonded by the thermal conductive glue 35 to ensure heat dissipation efficiency. As shown Figure 3 As shown, the battery module 18 mainly includes two end plates 10, a plurality of battery cells 7 arranged between the two end plates 10, and two steel strips 4 tied to the upper and lower parts of the two end plates 10. An insulating frame 8 is provided between adjacent battery cells 7. The insulating frame 8 is in a circular shape and has a heat dissipation vent in the middle. As a result, there is also a certain amount of heat dissipation space between adjacent battery cells 7, which can improve heat dissipation efficiency and avoid localized high temperatures. In summary, this embodiment effectively avoids the occurrence of localized high temperatures by rationally designing multiple heat dissipation spaces within the battery module, ensuring heat dissipation efficiency and safety.

[0028] like Figure 4As shown, several battery cells 7 in the battery module are equipped with battery connectors 3. This connector 3 comprises a flexible circuit board 301, aluminum bars 302, nickel sheets 303, and a temperature sensor. In this embodiment, six aluminum bars 302 are positioned on either side of the flexible circuit board 301. The bars are staggered in position, each connecting the positive and negative electrodes of adjacent cells. Therefore, this battery connector can connect up to 13 cells in series. Positive and negative aluminum bars 304 and 305 are also located at each end of the flexible circuit board 301, respectively, for connecting to the positive and negative terminals on the end plate 10. A nickel sheet 303 is welded between each aluminum bar 302 and the flexible circuit board 301. This nickel sheet 303 is used to collect the voltage of each cell 7 to facilitate voltage monitoring. There are 13 temperature sensors, each attached to a cell. The temperature sensors are in communication with the flexible circuit board 31 to monitor the temperature of each cell. Therefore, this battery module can obtain the voltage and temperature of each battery cell, and can transmit the voltage and temperature data to the battery management system and energy storage system background through the battery connector to monitor the voltage and temperature status of each battery cell, detect battery cell abnormalities in time, eliminate safety hazards, and ensure electricity safety.

[0029] like Figure 1 As shown, the edge of the shell 16 is provided with a flange, and a shell sealing ring 17 is provided between the flange and the liquid cooling plate 34. A flange molding 15 is provided on the upper side of the flange. The flange molding 15 and the liquid cooling plate 34 are fastened by screws, thereby pressing the shell sealing ring 17 to ensure the sealing performance and prevent external impurities and water from entering the battery module and causing damage to the battery cells and electrical components.

[0030] like Figure 2 As shown, in order to facilitate the lifting and transportation of the entire battery module, two lifting brackets 13 are provided on the two opposite edges of the liquid cooling plate 34. A fixing bracket 14 is also provided on both sides of the front end of the liquid cooling plate 34. Figure 5 As shown, the fixing bracket 14 is provided with two rivet nuts 141 facing the front, which are convenient for connecting bolts during installation. The side of the fixing bracket 14 is folded up to form a reinforcing rib 142 to improve the structural strength. When the battery module is installed in the energy storage cabinet, it is fixed in the energy storage cabinet by a total of four rivet nuts 141 on both sides, ensuring that the battery module is fixed in position during the movement and transportation of the energy storage cabinet and will not be displaced. The fixing bracket 14 and the rivet nuts 141 are made of stainless steel. While fixing the bracket with screws, the battery module can be connected to the energy storage cabinet body and grounded, thereby improving the safety of the battery module. In order to ensure the stability of the position of the battery module on the liquid cooling plate, a positioning step 342 is provided on the front and back sides of the liquid cooling plate 34, and the two end plates 10 are fixedly connected to a positioning step respectively by bolts.

[0031] like Figure 1As shown, the front side of the housing 16 is provided with three openings, each of which is provided with a panel bracket 19. The left portion of the panel bracket 19 is provided with a positive connector 21 and a negative connector 22, arranged vertically, as well as a manual maintenance switch 24. The manual maintenance switch 24 is provided with an upper cover 23. Pulling out the upper cover 23 disconnects the positive connection within the battery module, preventing short circuits during production or maintenance that could cause personal injury or damage to battery module components. A front panel 26 is provided in the middle of the panel bracket 19. Inside the front panel 26 is a battery management system 36, which collects the voltage and temperature of the battery cells using the nickel sheet 33 and temperature sensor, and transmits these to the energy storage system backend. The right side of the panel bracket 19 is equipped with a fire nozzle 27, an explosion-proof valve 28, a fire-fighting composite detector 29, and a communication connector 31. The fire nozzle 27 is used to spray external fire-fighting agents directly into the battery module to quickly suppress fires. The explosion-proof valve 28 is designed to automatically open when the internal pressure of the battery module is too high, relieving the battery module and preventing explosions caused by excessive pressure, thereby reducing the possibility of safety accidents. The fire-fighting composite detector 29 is used to detect the temperature and carbon monoxide concentration within the battery module and issue an alarm for abnormal conditions. The communication connector 31 is used to transmit information collected by the battery management system 36 to the energy storage system backend. To ensure sealing, a panel sealing ring 30 is installed between the panel bracket 19 and the housing 16, and a panel pressure strip 25 is installed on the panel sealing ring 30.

[0032] like Figure 2 As shown, a water inlet 343 and a water outlet 344 are provided at the front end of the liquid cooling plate 34, that is, the water inlet and outlet are on the same side as the various functional components mentioned above, which makes operation more convenient.

[0033] The above is only a preferred embodiment of the present invention, which is one implementation method based on the overall concept of the present invention. The scope of protection of the present invention is not limited to this embodiment. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A battery module, characterized in that: It includes a liquid cooling plate, a battery module, and a shell. The battery module includes two end plates and several battery cells arranged between the two end plates. An insulating frame is provided between adjacent battery cells, and a heat dissipation port is provided in the middle of the insulating frame. Several limit strips are provided on the liquid cooling plate, and a battery module is provided between adjacent limit strips. Thermal conductive glue is provided between the battery module and the liquid cooling plate, and the shell is connected to the outside of the limit strip on the liquid cooling plate.

2. A battery module according to claim 1, characterized in that: A battery connecting piece is provided on a plurality of battery cells of the battery module, a plurality of temperature sensors are provided on the battery connecting piece, and each temperature sensor is attached to a battery cell.

3. A battery module according to claim 2, characterized in that: The battery connecting piece includes a flexible circuit board and aluminum bars that connect the positive and negative electrodes of adjacent battery cells in series, and a nickel sheet is welded between each aluminum bar and the flexible circuit board.

4. The battery module according to claim 1, characterized in that: The edge of the shell is provided with a flange, a shell sealing ring is provided between the flange and the liquid cooling plate, a flange pressure strip is provided on the upper side of the flange, and the flange pressure strip and the liquid cooling plate are fastened by screws.

5. The battery module according to claim 1, characterized in that: Two hanging brackets are provided on two opposite edges of the liquid cooling plate.

6. The battery module according to claim 1, characterized in that: A fixing bracket is respectively provided on both sides of the front end of the liquid cooling plate, and two rivet nuts are provided on the fixing bracket.

7. The battery module according to claim 1, characterized in that: The liquid cooling plate is provided with two positioning steps, and the two end plates are fixedly connected to one positioning step respectively by bolts.

8. The battery module according to claim 1, characterized in that: The front side of the shell is provided with an opening, a panel bracket is provided at the opening, and the panel bracket is provided with positive and negative connectors, a manual maintenance switch, a fire nozzle, an explosion-proof valve, a fire composite detector, and a communication connector.

9. The battery module according to claim 8, characterized in that: A panel sealing ring is provided between the panel bracket and the shell, and a panel pressure strip is provided on the panel sealing ring.

10. The battery module according to claim 1, characterized in that: A water inlet and a water outlet are provided at the front end of the liquid cooling plate.

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