Battery PACK plug-in box based on rapid heat conduction and two-stage heat conduction of partition plate and manufacturing method

Abstract

According to the battery PACK plug-in box based on rapid heat conduction of the partition plate and two-stage heat conduction, the design and manufacturing method are optimized in multiple dimensions from the design of materials, the structure and the product system architecture, and the manufacturing method of the two-stage heat conduction battery PACK plug-in box which is efficient in heat dissipation and capable of saving energy consumption is formed; when a plurality of single batteries are stacked to form the battery pack and the PACK, corresponding fastening force is applied to the installation design of the plurality of single batteries stacked together in each battery pack and the PACK, and the problems of quick heat dissipation, prevention of swelling in the charging and discharging process of the battery and influence on the service life and the safety of the battery are solved. The heat dissipation capability of battery energy storage is improved, the heat dissipation cost and energy consumption during operation are saved, the thermal runaway prevention capability of the battery is improved, and the effects of prolonging the service life of the battery and improving the safety are achieved.

Description

Technical Field

[0001] This invention relates to the field of battery energy storage, and particularly to a battery pack and its manufacturing method based on two-stage heat conduction with rapid thermal conduction through a separator. Background Technology

[0002] The integration of a large amount of renewable energy into new power systems has rendered the regulation capabilities of traditional power systems insufficient for safe and stable operation. Therefore, battery energy storage systems are needed for regulation and application. Since the voltage and capacity of each individual battery cell in a battery energy storage system are relatively small, multiple individual cells need to be connected in series and parallel to form a high-capacity, high-voltage battery pack. Multiple battery packs and packs then constitute a battery energy storage unit system. Because the operation of battery energy storage systems generates heat, affecting battery cycle life and safety, there is an urgent need to solve the heat dissipation technology problem of battery energy storage systems. Simultaneously, the production of safe, reliable, and easily heat-dissipating battery packs and packs is extremely important for the integration and application of battery energy storage systems.

[0003] Currently, the main forms of single-cell batteries are pouch batteries and hard-case batteries. Multiple single-cell batteries are usually stacked and connected to form a battery pack, equipped with heat dissipation devices such as air cooling and liquid cooling, and installed together in a box to form a battery pack and used in battery energy storage systems. Especially for pouch batteries, when multiple single-cell batteries are stacked to form a battery pack, the multiple single-cell batteries stacked together in each battery pack need to have a certain degree of tightness, and need to be able to dissipate heat quickly and prevent the battery from swelling and bulging during charging and discharging, which would affect the battery's lifespan and safety. Summary of the Invention

[0004] The main objective of this invention is to provide a battery pack and its manufacturing method based on two-stage heat conduction using a separator for rapid thermal conduction.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A battery pack enclosure based on rapid heat conduction through separators and two-stage thermal conductivity includes a liquid-cooled battery pack, a battery pack enclosure body, and a battery pack enclosure top cover. The liquid-cooled battery pack is fixedly installed inside the battery pack enclosure body. The battery pack enclosure top cover is fixedly installed on the upper end of the battery pack enclosure body. The liquid-cooled battery pack includes a battery string, a liquid cooling plate, an inlet pipe, and an outlet pipe. The battery string includes multiple battery cells connected in series and multiple battery thermally conductive separators. The battery cells are tightly connected to the battery thermally conductive separators. Separator side plates are fixedly provided on both sides of the battery thermally conductive separators. Liquid cooling plates are respectively tightly attached to the separator side plates. The liquid cooling plates are respectively connected to the inlet pipe and the outlet pipe. An electrical parameter sensor is fixedly connected to each battery cell.

[0006] Furthermore, the electrical parameter sensor includes one or more of a voltage sensor, a temperature sensor, and a pressure sensor.

[0007] Furthermore, the battery thermally conductive separator is made of a heat dissipation material, and several ventilation and heat dissipation grooves are fixedly formed on the battery thermally conductive separator, with the separator side plates located at both ends in the direction of the ventilation and heat dissipation grooves.

[0008] Furthermore, a panel is fixedly provided on one side of the battery pack housing. The panel is fixedly provided with an upper positive terminal, a fuse, an upper negative terminal, a switch, a first communication interface terminal, a second communication interface terminal, a liquid inlet terminal, and a liquid outlet terminal. The inner ends of the liquid inlet and liquid outlet terminals are fixedly connected to the liquid inlet and liquid outlet pipes, respectively, and the outer ends of the liquid inlet and liquid outlet terminals are fixedly connected to a liquid cooling device, respectively. The signal transmission line of the electrical parameter sensor is connected to the first and second communication interface terminals on the battery pack housing panel. The positive and negative terminals on the panel are fixedly connected to the positive and negative terminals of the battery pack, respectively. A fuse is fixedly connected between the negative terminal on the panel and the negative terminal of the battery pack, and a switch is fixedly connected between the positive terminal on the panel and the positive terminal of the battery pack. The switch is fixedly mounted on the panel.

[0009] Furthermore, a signal acquisition circuit module is also fixedly installed on the panel, which is electrically connected to the electrical parameter sensor.

[0010] Furthermore, multiple battery cells and multiple battery thermally conductive separators are stacked in a cross-spaced manner to form a battery pack with a first-level heat conduction and heat dissipation path, and a front end plate of the battery pack is installed on the front side of the battery pack and a rear end plate of the battery pack is installed on the rear side of the battery pack.

[0011] Furthermore, the positive and negative tabs of the multiple battery cells in the battery pack are connected to the positive tab of any two adjacent battery cells and the negative tab of the other adjacent battery cell through the battery pack liner.

[0012] Furthermore, the battery cell, battery thermal separator, battery pack front end plate and battery pack rear end plate are secured by two cable ties.

[0013] A method for manufacturing a battery pack enclosure includes the following steps: S1, the production of the battery pack: according to the battery capacity and voltage level of the battery pack box, the number of multiple battery cells is designed and stacked in the order of front panel of battery pack, battery cell, battery heat-conducting separator, battery cell, battery heat-conducting separator... battery cell, battery pack rear panel, forming a battery pack that conducts heat through the battery heat-conducting separator. S2, fixing and connecting the battery pack: the battery pack is bundled with high-strength cable ties. At the same time, the positive and negative tabs of multiple battery cells in the battery pack are connected to any adjacent battery cells through the battery pack liner. One positive tab of one battery is connected to the negative tab of another adjacent battery. Voltage, temperature and pressure electrical parameter sensors are connected to form a battery pack that is connected to the BMS electrical signal acquisition sensor. S3, the second stage of heat conduction, involves attaching liquid cooling plates to the battery thermally conductive side plates on both sides of the battery pack connected to the BMS electrical signal acquisition sensor obtained in S2, forming a liquid-cooled battery pack, which is then installed in the battery pack housing. The positive terminal of the battery pack in the liquid-cooled battery pack is connected to the positive terminal of the battery pack housing panel via a manual or electric switch, while the negative terminal of the battery pack in the liquid-cooled battery pack is connected to the negative terminal of the battery pack housing panel via a fuse. The operating handle of the switch is installed on the battery pack housing panel. The signal transmission line of the electrical parameter sensor is connected to the first and second communication interface terminals on the battery pack housing panel. The liquid cooling plate inlet pipe and liquid cooling plate outlet pipe are connected to the inlet terminal and outlet terminal on the battery pack housing panel, respectively. The inlet terminal and outlet terminal are connected to the liquid cooling device via the liquid cooling device inlet pipe and liquid cooling device outlet pipe, respectively. S4, signal acquisition connection, connects to the voltage, temperature and pressure electrical parameter sensors of multiple battery cells, which are respectively connected to the electrical parameter sensor signal acquisition circuit module of the battery management system (BMS). The electrical parameter sensor signal acquisition circuit module is installed on the battery pack panel.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention optimizes the design and manufacturing methods from multiple dimensions, from materials and structure to product system architecture. It proposes a two-stage thermally conductive battery PACK assembly method that achieves efficient heat dissipation and energy saving. This effectively solves the problem of achieving the required tightness when installing multiple stacked individual batteries in a battery pack, while also ensuring rapid heat dissipation from these stacked batteries. This effectively prevents bulging and swelling during charging and discharging, which can affect battery life and safety. It improves the heat dissipation capacity of battery energy storage, saves on heat dissipation costs and energy consumption during operation, enhances the battery's ability to prevent thermal runaway, improves battery life and safety, and increases the economic efficiency of battery energy storage system operation. Attached Figure Description

[0015] Figure 1 This is an exploded structural diagram of the present invention; Figure 2This is a perspective view of the liquid-cooled battery pack of the present invention; Figure 3 This is a perspective view of the battery thermally conductive separator of the present invention; Figure 4 This is an exploded perspective view of the battery pack string of the present invention; Figure 5 This is the front view of the panel of the present invention.

[0016] Figure label: 10. Battery pack; 11. Battery cell; 12. Battery thermal separator; 13. Separator side plate; 14. Battery pack front panel; 15. Battery pack rear panel; 16. Cable tie; 18. Liner; 20. Liquid-cooled battery pack (PAC); 21. Liquid cooling plate; 22. Liquid inlet pipe; 23. Liquid outlet pipe; 30. Battery pack housing; 31. Battery pack top cover; 32. Liquid inlet terminal; 33. Liquid outlet terminal; 34. Positive terminal; 35. Negative terminal; 36. Fuse; 37. First communication interface terminal; 38. Second communication interface terminal; 39. Panel; 40. Signal acquisition circuit module. Detailed Implementation

[0017] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention. Example 1

[0018] Referring to Figures 1-5, a battery pack enclosure based on rapid heat conduction via separators and two-stage thermal conductivity includes a liquid-cooled battery pack, a battery pack enclosure housing, and a battery pack enclosure top cover. The liquid-cooled battery pack is fixedly installed inside the battery pack enclosure housing. The battery pack enclosure top cover is fixedly installed on the upper end of the battery pack enclosure housing. The liquid-cooled battery pack includes a battery string, a liquid cooling plate, an inlet pipe, and an outlet pipe. The battery string includes multiple battery cells connected in series and multiple battery thermally conductive separators. A battery thermally conductive separator is tightly fitted between the cells. Multiple battery cells are designed according to the capacity and voltage level of the battery pack housing. They are stacked sequentially in the following order: front panel of the battery pack, battery cells, battery thermally conductive separator, battery cells, battery thermally conductive separator… battery cells, and rear panel of the battery pack, forming the battery pack. Side panels are fixedly installed on both sides of the battery thermally conductive separator, and liquid cooling plates are tightly fitted onto each side panel. These liquid cooling plates are connected to inlet and outlet liquid cooling pipes, respectively. Electrical parameter sensors are fixedly connected to each battery cell. A liquid-cooled battery pack is constructed and installed in the battery pack housing. The positive terminal of the battery pack in the liquid-cooled battery pack is connected to the positive terminal of the battery pack housing panel via a manual or electric switch. At the same time, the negative terminal of the battery pack in the liquid-cooled battery pack is connected to the negative terminal of the battery pack housing panel via a fuse. The operating handle of the switch is installed on the battery pack housing panel. The signal transmission line of the electrical parameter sensor is connected to the first communication interface terminal and the second communication interface terminal on the battery pack housing panel. The liquid-cooled plate inlet pipe and liquid-cooled plate outlet pipe are connected to the liquid inlet terminal and liquid outlet terminal on the battery pack housing panel, respectively. The liquid inlet terminal and liquid outlet terminal are connected to the liquid-cooling device via the liquid-cooling device inlet pipe and liquid-cooling device outlet pipe, respectively.

[0019] The electrical parameter sensor includes one or more of a voltage sensor, a temperature sensor, and a pressure sensor.

[0020] The signal acquisition connection connects to the voltage, temperature, and pressure electrical parameter sensors of multiple battery cells, which are respectively connected to the electrical parameter sensor signal acquisition circuit module of the battery management system (BMS). The electrical parameter sensor signal acquisition circuit module is installed on the battery pack panel.

[0021] The battery thermally conductive separator is made of heat dissipation material, and several ventilation and heat dissipation grooves are fixedly opened on the battery thermally conductive separator. The side plates of the separator are located at both ends in the direction of the ventilation and heat dissipation grooves.

[0022] A panel is fixedly installed on one side of the battery pack housing. The panel is equipped with a positive terminal, a fuse, a negative terminal, a switch, a first communication interface terminal, a second communication interface terminal, a liquid inlet terminal, and a liquid outlet terminal. The inner ends of the liquid inlet and outlet terminals are fixedly connected to the liquid inlet and outlet pipes, respectively, and the outer ends are fixedly connected to a liquid cooling device. The signal transmission line of the electrical parameter sensor is connected to the first and second communication interface terminals on the battery pack housing panel. The positive and negative terminals on the panel are fixedly connected to the positive and negative terminals of the battery pack, respectively. A fuse is fixedly connected between the negative terminal and the negative terminal of the battery pack, and a switch is fixedly connected between the positive terminal and the positive terminal of the battery pack. The switch is fixedly installed on the panel.

[0023] A signal acquisition circuit module is also fixedly installed on the panel, and the signal acquisition circuit module is electrically connected to the electrical parameter sensor.

[0024] Multiple battery cells and multiple battery thermally conductive separators are stacked in a cross-spaced manner to form a battery pack with a first-level heat conduction and heat dissipation path. A front-end plate of the battery pack is installed on the front side of the battery pack and a rear-end plate of the battery pack is installed on the rear side of the battery pack.

[0025] The positive and negative tabs of the individual cells in the battery pack are connected to the negative tabs of any two adjacent cells via the battery pack liner.

[0026] The individual battery cells, thermally conductive separators, front and rear panels of the battery pack are secured by two cable ties. The battery pack is secured and connected by using high-strength cable ties. Simultaneously, the positive and negative tabs of multiple individual battery cells within the pack are connected via the battery pack liner. Any adjacent individual battery cell has its positive tab connected to the negative tab of another adjacent cell. Voltage, temperature, and pressure sensors are then connected to form the battery pack, which is connected to the BMS (Battery Management System) electrical signal acquisition sensors. The above description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A battery pack enclosure based on rapid heat conduction through a separator and two-stage heat conduction, comprising a liquid-cooled battery pack (20), a battery pack enclosure body (30), and a battery pack enclosure top cover (31), characterized in that: The liquid-cooled battery pack (20) is fixedly installed inside the battery pack housing (30). The battery pack housing (30) is fixedly installed with a battery pack top cover (31). The liquid-cooled battery pack (20) includes a battery string pack (10), a liquid cooling plate (21), an inlet pipe (22), and an outlet pipe (23). The battery string pack (10) includes multiple battery cells (11) connected in series and multiple battery thermally conductive separators (12). The battery cells (11) are tightly connected to each other with the battery thermally conductive separators (12). The battery thermally conductive separators (12) are fixedly provided on both sides of the battery thermally conductive separators (12). The liquid cooling plates (21) are tightly connected to the liquid cooling plates (21) respectively. The liquid cooling plates (21) are connected to the inlet pipe (22) and the outlet pipe (23) respectively. An electrical parameter sensor is fixedly connected to the battery cell (11).

2. The battery pack box based on two-stage heat conduction with rapid heat transfer through a separator, as described in claim 1, is characterized in that: The electrical parameter sensor includes one or more of a voltage sensor, a temperature sensor, and a pressure sensor.

3. A battery pack box based on rapid heat conduction through a separator and two-stage heat conduction as described in claim 1, characterized in that: The battery thermally conductive separator (12) is made of heat dissipation material, and a number of ventilation and heat dissipation grooves are fixedly opened on the battery thermally conductive separator (12). The separator side plate (13) is located at both ends in the direction of the ventilation and heat dissipation grooves.

4. A battery pack box based on rapid heat conduction through a separator and two-stage heat conduction as described in claim 1, characterized in that: A panel (39) is fixedly provided on one side of the battery pack housing (30). A positive terminal (34), a fuse (36), a negative terminal (35), a switch, a first communication interface terminal (37) and a second communication interface terminal (38), a liquid inlet terminal (32) and a liquid outlet terminal (33) are fixedly provided on the panel (39). The inner ends of the liquid inlet terminal (32) and the liquid outlet terminal (33) are fixedly connected to the liquid inlet pipe (22) and the liquid outlet pipe (23) respectively, and the outer ends of the liquid inlet terminal (32) and the liquid outlet terminal (33) are fixedly connected to the liquid cooling device respectively. The signal transmission line of the electrical parameter sensor is connected to the first communication interface terminal (37) and the second communication interface terminal (38) on the battery PACK box panel (39). The positive terminal (34) and the negative terminal (35) are fixedly connected to the positive and negative terminals of the battery pack (10), respectively. A fuse (36) is fixedly connected between the upper negative terminal (35) and the negative terminal of the battery pack (10). A switch is fixedly connected between the upper positive terminal (34) and the positive terminal of the battery pack (10). The switch is fixedly installed on the panel (39).

5. A battery pack box based on two-stage heat conduction with rapid thermal conduction through a separator, as described in claim 4, characterized in that: A signal acquisition circuit module (40) is also fixedly installed on the panel (39), and the signal acquisition circuit module (40) is electrically connected to the electrical parameter sensor.

6. A battery pack box based on two-stage heat conduction using rapid heat conduction through a separator, as described in claim 1, characterized in that: Multiple battery cells (11) and multiple battery thermally conductive separators (12) are stacked at intervals to form a battery pack (10) with a first-level heat dissipation path. A front end plate of the battery pack (10) is installed on the front side of the battery pack (10) and a rear end plate of the battery pack (10) is installed on the rear side of the battery pack (10).

7. A battery pack box based on rapid heat conduction through a separator and two-stage heat conduction as described in claim 1, characterized in that: The positive and negative tabs of the multiple battery cells (11) in the battery pack (10) are respectively connected by a battery pack liner (18), which connects the positive tab of any two adjacent battery cells (11) to the negative tab of the other adjacent battery cell.

8. A battery pack box based on rapid heat conduction through a separator and two-stage heat conduction as described in claim 6, characterized in that: The battery cell (11), battery thermal separator (12), front end plate of battery pack (10) and rear end plate of battery pack (10) are tied and fixed by two cable ties (16).

9. A method for manufacturing a battery pack according to any one of claims 1-8, characterized in that: Including the following steps: S1, the battery pack (10) is manufactured by designing multiple battery cells (11) according to the battery capacity and voltage level of the battery pack box (30), and stacking them in the order of front end plate of battery pack (10), battery cell (11), battery heat-conducting separator (12), battery cell (11), battery heat-conducting separator (12)... battery cell (11), battery pack (10) rear end plate to form a battery pack (10) that conducts heat through the battery heat-conducting separator; S2, fixing and connecting the battery pack (10): the battery pack (10) is bundled with high-strength cable ties (16), and the positive and negative tabs of the multiple battery cells (11) of the battery pack (10) are connected to any adjacent battery cells (11) through the battery pack liner (18), with one battery positive tab connected to another adjacent battery negative tab, and voltage, temperature and pressure electrical parameter sensors are connected to form the battery pack (10) connected to the BMS electrical signal acquisition sensor; S3, the second stage of heat conduction involves attaching liquid cooling plates (21) to the side plates of the battery thermally conductive separators (12) on both sides of the battery pack (10) connected to the BMS electrical signal acquisition sensor obtained in S2, thus forming a liquid-cooled battery PACK (20) and installing it in the battery PACK box (30). The positive terminal of the battery pack (10) in the liquid-cooled battery PACK (20) is connected to the positive terminal post (34) of the battery PACK box panel (39) via a manual or electric switch. At the same time, the negative terminal of the battery pack (10) in the liquid-cooled battery PACK (20) is connected to the battery PACK box panel (39) via a fuse (36). 9) On the negative terminal (35), the operating handle of the switch is installed on the battery PACK box panel (39). The signal transmission line of the electrical parameter sensor is connected to the first communication interface terminal (37) and the second communication interface terminal (38) on the battery PACK box panel (39). The liquid cooling plate (21) is connected to the liquid cooling plate (21) inlet pipe (22) and liquid cooling plate (21) outlet pipe (23), which are respectively connected to the liquid inlet terminal (32) and liquid outlet terminal (33) on the battery PACK box panel (39). The liquid inlet terminal (32) and liquid outlet terminal (33) are respectively connected to the liquid cooling device through the liquid cooling device inlet pipe and liquid cooling device outlet pipe. S4, signal acquisition connection, connects the voltage, temperature and pressure electrical parameter sensors of multiple battery cells (11), respectively connected to the electrical parameter sensor signal acquisition circuit module (40) of the battery management system (BMS), and the electrical parameter sensor signal acquisition circuit module (40) is installed on the battery PACK box panel (39).

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