Battery module and battery pack

Abstract

The application discloses a battery module and a battery pack, and belongs to the technical field of batteries. The battery module comprises a battery cell connecting system and a plurality of battery cells. The battery cell connecting system comprises a circuit element and a separator bearing the circuit element. The circuit element is provided with a temperature measuring assembly. The separator is provided with a temperature measuring hole. The temperature measuring assembly is arranged in the temperature measuring hole and connected to the battery cell. The separator is provided with a positioning part protruding towards the battery cell. The positioning part is in abutment with one side of the temperature measuring assembly away from the battery cell. The positioning part protruding towards the battery cell is arranged on the separator. The positioning part is in abutment with one side of the temperature measuring assembly away from the battery cell. After the temperature measuring assembly passes through the temperature measuring hole, the temperature measuring assembly can be smoothly connected to the battery cell, so that the installation of the temperature measuring assembly is facilitated.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery module and battery pack. Background Technology

[0002] Battery pack assembly refers to combining multiple battery cells in series and / or in parallel using connecting elements to form a battery pack with a larger capacity. After installing separators and circuit components, the battery pack is placed in a module frame of the corresponding size to form a battery module.

[0003] In related technologies, battery modules typically have temperature sensing holes on the separators. Temperature sensing components pass through these holes to detect the temperature of the battery cells. However, when connecting the temperature sensing components to the battery cells, their position can only be adjusted through the temperature sensing holes, making the installation of these components rather cumbersome. Utility Model Content

[0004] One of the objectives of this application is to provide a battery module that facilitates the installation of temperature sensing components, thereby at least partially solving the aforementioned technical problems.

[0005] Another objective of this application is to provide a battery pack including a battery module.

[0006] To achieve the above objectives, according to a first aspect of this application, a battery module is provided, comprising: Multiple battery cells; A cell connection system includes circuit elements and an isolator that carries the circuit elements. The circuit elements have a temperature sensing component, and the isolator has a temperature sensing hole. The temperature sensing component passes through the temperature sensing hole and is connected to the cell. The isolation component has a positioning part that protrudes toward the battery cell and abuts against the side of the temperature measuring component away from the battery cell.

[0007] Optionally, the battery cell has a temperature measuring part, a positioning part protrudes toward the temperature measuring part, the positioning part has a positioning hole, and the temperature measuring component has a temperature sensor, which is inserted into the positioning hole.

[0008] Optionally, the circuit elements include a circuit board, and the temperature measuring assembly also has a temperature measuring branch that connects the temperature sensor to the circuit board. The positioning part includes an abutment wall forming a positioning hole, which abuts against the side of the temperature measuring branch away from the temperature measuring part.

[0009] Optionally, the isolation member has a mounting portion forming a temperature measuring hole, the mounting portion and the temperature measuring portion having a first distance, and the mounting portion and the abutting wall having a second distance, the second distance being less than the first distance.

[0010] Optionally, the positioning part also includes a docking wall and a docking channel. The docking wall connects the abutment wall to the mounting part, and the docking channel is provided on the docking wall and connects the temperature measuring hole and the positioning hole.

[0011] Optionally, the temperature sensor includes a temperature measuring element and a positioning element. The temperature measuring element is electrically connected to the temperature measuring branch, and the positioning element surrounds the periphery of the temperature measuring element and is clearance-fitted with the positioning hole.

[0012] Optionally, the positioning part has at least one glue leakage hole, which is connected to the positioning hole.

[0013] Optionally, the temperature sensor includes a positioning element with two glue leakage holes located on opposite sides of the positioning element.

[0014] Optionally, the battery module also includes a connector that connects the temperature measuring branch to the temperature measuring unit.

[0015] According to a second aspect of this application, a battery pack is provided, including the battery module as described above.

[0016] In the battery module of this application embodiment, by providing a positioning part protruding towards the battery cell on the separator, and using the positioning part to abut against the side of the temperature measuring component away from the battery cell, the temperature measuring component can smoothly dock with the battery cell after passing through the temperature measuring hole, thereby facilitating the installation of the temperature measuring component. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0018] Figure 1 This is a schematic diagram of the overall structure of the battery module in an exemplary embodiment of this disclosure; Figure 2 yes Figure 1 A three-dimensional schematic diagram of the cross-sectional view at point AA; Figure 3 yes Figure 1 Exploded view of the battery module; Figure 4 yes Figure 1 A schematic plan view of the cross-section at point AA; Figure 5 yes Figure 3 A partial schematic diagram.

[0019] Explanation of reference numerals in the attached figures: 1. Battery cell; 11. Temperature measuring unit; 2. Battery cell connection system; 21. Circuit components; 211. Circuit board; 22. Isolator; 23. Temperature sensing assembly; 231. Temperature sensor; 232. Temperature sensing branch; 234. Positioning component; 24. Temperature sensing hole; 25. Positioning part; 251. Positioning hole; 252. Abutment wall; 253. Butt joint wall; 254. Butt joint channel; 255. Adhesive leakage hole; 26. Mounting part; 27. Busbar; D1, first distance; D2, second distance. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0021] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0022] In the various figures of this application, for ease of illustration, certain dimensions of structures or parts may be exaggerated relative to other structures or parts; therefore, they are only used to illustrate the basic structure of the subject matter of this application.

[0023] According to the first aspect of this application, referring to Figure 1 This disclosure provides a battery module, including a cell connection system 2 and a plurality of cells 1.

[0024] In this embodiment, the Cell Contact System 2 (CCS) can electrically connect the cells 1, for example, by connecting multiple cells 1 electrically via bus 27. The Cell Contact System 2 can also collect data from the cells 1.

[0025] In some embodiments, the cell connection system 2 includes a circuit element 21 and an isolation element 22 that carries the circuit element 21.

[0026] In this embodiment, the isolator 22 provides electrical isolation for the battery cell 1. The battery cell 1 and the isolator 22 are fixed together by welding between the busbar 27 and the terminal of the battery cell 1, thus connecting the battery cell connection system 2 and the battery cell 1.

[0027] In some embodiments, in conjunction with reference Figure 2 and Figure 3 As shown, the circuit element 21 has a temperature measuring component 23, the isolation component 22 has a temperature measuring hole 24, the temperature measuring component 23 passes through the temperature measuring hole 24 and is connected to the battery cell 1.

[0028] In this embodiment, the temperature measuring component 23 can measure the temperature of the battery cell 1. After passing through the temperature measuring hole 24, the temperature measuring component 23 is connected to (e.g., bonded to) the battery cell 1 to ensure that the temperature measuring component 23 can stably measure the temperature of the battery cell 1.

[0029] In some embodiments, the insulating member 22 has a positioning portion 25 protruding toward the battery cell 1.

[0030] In this embodiment, the positioning part 25 protrudes towards the cell 1 compared to other parts of the insulating member 22.

[0031] In some embodiments, the positioning part 25 abuts against the side of the temperature measuring component 23 away from the battery cell 1.

[0032] In this embodiment, the positioning part 25 abuts against the temperature measuring component 23, which can push the temperature measuring component 23 toward the battery cell 1 and press the temperature measuring component 23 to facilitate the connection between the temperature measuring component 23 and the battery cell 1.

[0033] By providing a positioning part 25 protruding toward the battery cell 1 on the isolation member 22, and using the positioning part 25 to abut against the side of the temperature measuring component 23 away from the battery cell 1, the temperature measuring component 23 can smoothly dock with the battery cell 1 after passing through the temperature measuring hole 24, thereby facilitating the installation of the temperature measuring component 23.

[0034] In some embodiments, the battery cell 1 has a temperature measuring unit 11.

[0035] In this embodiment, the temperature measuring unit 11 can be located between the two poles of the battery cell 1 and adjacent to the explosion-proof valve.

[0036] In some embodiments, the positioning part 25 protrudes toward the temperature measuring part 11.

[0037] In this embodiment, after the positioning member 234 protrudes toward the temperature measuring part 11, the positioning part 25 abuts against the side of the temperature measuring component 23 away from the temperature measuring part 11, ensuring that the temperature measuring component 23 can be accurately connected to the temperature measuring part 11, and ensuring that the temperature measuring component 23 can accurately measure the temperature of the battery cell 1.

[0038] In some embodiments, the temperature measuring component 23 has a temperature sensor 231.

[0039] In this embodiment, the temperature sensor 231 can be a negative temperature coefficient thermistor (NTC) that can monitor the temperature of cell 1 in real time.

[0040] In some embodiments, the positioning part 25 has a positioning hole 251, and the temperature sensor 231 passes through the positioning hole 251.

[0041] In this embodiment, since the positioning part 25 and the temperature measuring part 11 are arranged face to face, by providing a positioning hole 251 on the positioning part 25 and inserting the temperature sensor 231 into the positioning hole 251, it can be ensured that the temperature sensor 231 and the temperature measuring part 11 are accurately connected, so as to achieve accurate temperature measurement.

[0042] In this embodiment, the temperature sensor 231 is inserted into the positioning hole 251, which can also limit the offset of the temperature sensor 231 relative to the positioning part 25, so as to facilitate the connection between the temperature measuring component 23 and the battery cell 1.

[0043] For example, the positioning part 25 is located directly above the temperature measuring part 11.

[0044] In some embodiments, continue to refer to Figure 3 As shown, circuit element 21 includes circuit board 211.

[0045] In this embodiment, the circuit board 211 can be a flexible printed circuit (FPC) to realize the circuit conduction and signal transmission of the battery module.

[0046] For example, the circuit board 211 and the isolation member 22 can be fixed by thermal riveting.

[0047] In some embodiments, the temperature measuring component 23 further includes a temperature measuring branch 232, which connects the temperature sensor 231 to the circuit board 211.

[0048] In this embodiment, the temperature measuring branch 232 passes through the temperature measuring hole 24 and is connected to (e.g., bonded to) the battery cell 1. The temperature sensor 231 is connected to the temperature measuring branch 232, thereby connecting to the battery cell 1 (e.g., the temperature measuring part 11) through the temperature measuring branch 232 to realize temperature measurement of the battery cell 1.

[0049] In some embodiments, in conjunction with reference Figure 4 As shown, the positioning part 25 includes an abutment wall 252 forming a positioning hole 251.

[0050] In this embodiment, the abutment wall 252 is located at the end of the positioning part 25 facing the battery cell 1.

[0051] In some embodiments, the abutment wall 252 abuts against the side of the temperature measuring branch 232 away from the temperature measuring part 11.

[0052] In this embodiment, after the temperature sensor 231 is positioned by extending into the positioning hole 251, the positioning part 25 presses the temperature measuring branch 232 onto the temperature measuring part 11 through the abutment wall 252, ensuring that the temperature sensor 231 and the temperature measuring part 11 are accurately connected, while avoiding the temperature sensor 231 from shifting, so as to facilitate the connection between the temperature measuring component 23 and the temperature measuring part 11.

[0053] In this embodiment, the temperature measuring branch 232 is pressed and connected to the temperature measuring part 11 by the abutment wall 252, so that the temperature sensor 231 does not need to be pressed and the temperature sensor 231 is avoided from being damaged.

[0054] In this embodiment, the abutment wall 252 abuts against the temperature measuring branch 232 around the temperature sensor 231, ensuring the pressing strength of the abutment wall 252 against the temperature measuring branch 232 and preventing the temperature measuring branch 232 from becoming loose. This ensures sufficient adhesion between the temperature measuring branch 232 and the temperature measuring part 11, improving the connection strength between them.

[0055] In some embodiments, continue to refer to Figure 4 As shown, the isolation member 22 has a mounting portion 26 forming a temperature measuring hole 24.

[0056] In this embodiment, the mounting part 26 can be a planar structure that fits against the circuit board 211, and the positioning part 25 protrudes from the mounting part 26 on the side facing the battery cell 1.

[0057] For example, the spacer 22 can be made of an insulating material, such as plastic. The spacer 22 can be manufactured using a vacuum forming process.

[0058] In some embodiments, there is a first distance D1 between the mounting part 26 and the temperature measuring part 11, and a second distance D2 between the mounting part 26 and the abutment wall 252.

[0059] In this embodiment, the first distance D1 can be the interval between the mounting part 26 and the temperature measuring part 11. The second distance D2 can be the height of the positioning part 25 protruding from the plane of the mounting part 26.

[0060] In some embodiments, the second distance D2 is less than the first distance D1.

[0061] In this embodiment, by controlling the second distance D2 to be smaller than the first distance D1, the distance between the abutment wall 252 and the mounting portion 26 is controlled to be relatively small. This allows the abutment wall 252 to abut against the side of the temperature-sensing branch 232 away from the battery cell 1 (e.g., the temperature-sensing portion 11) after the temperature-sensing branch 232 is connected to it. Furthermore, when the isolator 22 presses the temperature-sensing branch 232 using the abutment wall 252, damage to the temperature-sensing branch 232 is avoided.

[0062] In this embodiment, since the contact wall 252 abuts against the temperature measuring branch 232, the temperature sensor 231 can approach the temperature measuring part 11 to measure the temperature, thus ensuring the accuracy of temperature measurement.

[0063] In some embodiments, continue to refer to Figure 4 As shown, the positioning part 25 also includes a docking wall 253 and a docking channel 254. The docking wall 253 connects the abutment wall 252 to the mounting part 26, and the docking channel 254 is disposed on the docking wall 253.

[0064] In this embodiment, the mating wall 253 is connected to the periphery of the abutment wall 252, and a mating channel 254 is provided between the positioning hole 251 and the temperature measuring hole 24. After the mating channel 254 passes through the mating wall 253, it can connect the temperature measuring hole 24 and the positioning hole 251, thereby facilitating the manufacture of the isolation member 22.

[0065] In some embodiments, continue to refer to Figure 2 and Figure 4 As shown, the docking channel 254 connects the temperature measuring hole 24 and the positioning hole 251.

[0066] In this embodiment, the temperature measuring hole 24 and the positioning hole 251 are interconnected, which facilitates the insertion of the temperature measuring component 23 into the temperature measuring hole 24 and the positioning hole 251. Furthermore, it also facilitates the adjustment of the temperature measuring branch 232, thereby ensuring accurate alignment of the temperature sensor 231 with the positioning hole 251.

[0067] In some embodiments, in conjunction with reference Figure 4 and Figure 5 As shown, the temperature sensor 231 includes a temperature measuring element (not shown) and a positioning element 234.

[0068] In some embodiments, the temperature measuring element is electrically connected to the temperature measuring branch 232, and the positioning element 234 surrounds the periphery of the temperature measuring element.

[0069] In this embodiment, the positioning element 234 is connected to the temperature measuring branch 232 and surrounds the periphery of the temperature measuring element, thus protecting the temperature measuring element.

[0070] For example, the positioning member 234 is connected to the side of the temperature measuring branch 232 away from the temperature measuring part 11 and passes through the positioning hole 251.

[0071] For example, the positioning element 234 can be made of plastic, such as epoxy plastic.

[0072] In some embodiments, the positioning member 234 is clearance-fitted with the positioning hole 251.

[0073] In this embodiment, the positioning member 234 and the positioning hole 251 are fitted with a clearance, which facilitates the adjustment of the position of the temperature measuring branch 232 within the temperature measuring hole 24 and the docking channel 254, thereby facilitating the docking between the positioning member 234 and the positioning hole 251. Furthermore, it also facilitates the contact wall 252 to abut against the temperature measuring branch 232, thereby pressing the temperature measuring branch 232 onto the temperature measuring part 11 for bonding.

[0074] In this embodiment, since the aperture size of the positioning hole 251 is smaller than that of the temperature measuring part 11, the positioning member 234 and the positioning hole 251 are fitted with a clearance, which can also ensure that after the temperature sensor 231 is inserted through the positioning hole 251, the position between the temperature sensor 231 and the temperature measuring part 11 meets the temperature measurement requirements.

[0075] In some embodiments, continue to refer to Figure 5 As shown, the positioning part 25 has at least one glue leakage hole 255.

[0076] In this embodiment, when the temperature measuring component 23 (e.g., temperature measuring branch 232) and the battery cell 1 (e.g., temperature measuring part 11) are connected, glue (e.g., UV glue) can be applied between the two through the glue leakage hole 255, thereby bonding the temperature measuring component 23 to the battery cell 1.

[0077] In some embodiments, the glue leakage hole 255 is connected to the positioning hole 251.

[0078] In this embodiment, the glue leakage hole 255 is connected to the positioning hole 251, so that the glue injected from the glue leakage hole 255 can flow from the vicinity of the hole wall of the positioning hole 251 to the battery cell 1, thereby more accurately bonding the temperature measuring component 23 to the battery cell 1.

[0079] In this embodiment, the glue leakage hole 255 is disposed on the hole wall of the positioning hole 251, thereby communicating with the positioning hole 251.

[0080] In some embodiments, continue to refer to Figure 5 As shown, the positioning part 25 has two glue leakage holes 255.

[0081] In this embodiment, glue is injected through two glue leakage holes 255, which can improve the glue injection efficiency.

[0082] In some embodiments, two glue leakage holes 255 are provided on opposite sides of the positioning member 234.

[0083] In this embodiment, two glue leakage holes 255 are symmetrically arranged on the two hole walls of the positioning hole 251. When glue is injected through the two glue leakage holes 255, it can ensure that the periphery of the temperature sensor 231 is fully glued and that the periphery of the temperature sensor 231 is evenly glued, thus ensuring the bonding strength between the temperature measuring component 23 and the battery cell 1.

[0084] In other embodiments, the battery module also includes a connector (not shown) that connects the temperature measuring branch 232 to the temperature measuring part 11.

[0085] In this embodiment, the connector is connected between the temperature measuring branch 232 and the temperature measuring part 11, thereby fixing the temperature measuring branch 232 to the temperature measuring part 11. Consequently, there is no need to apply glue between the temperature measuring branch 232 and the temperature measuring part 11, and the glue leakage hole 255 can also be eliminated.

[0086] In this embodiment, the connector can be a thermal pad, which can transfer heat between the temperature measuring part 11 and the temperature measuring branch 232 (i.e., temperature sensor 231).

[0087] According to a second aspect of this disclosure, a battery pack is provided that includes the battery module described above. This battery pack possesses all the beneficial effects of the battery module described above, which will not be elaborated further herein.

[0088] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0089] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0090] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0091] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A battery module, characterized in that, include: Multiple battery cells; A cell connection system includes circuit elements and an isolation component supporting the circuit elements. The circuit elements have a temperature sensing assembly, and the isolation component has a temperature sensing hole. The temperature sensing assembly passes through the temperature sensing hole and is connected to the cell. The isolation member has a positioning portion protruding toward the battery cell, and the positioning portion abuts against the side of the temperature measuring component away from the battery cell.

2. The battery module as described in claim 1, characterized in that, The battery cell has a temperature measuring part, the positioning part protrudes toward the temperature measuring part, the positioning part has a positioning hole, the temperature measuring component has a temperature sensor, and the temperature sensor passes through the positioning hole.

3. The battery module as described in claim 2, characterized in that, The circuit element includes a circuit board, and the temperature measuring component further includes a temperature measuring branch that connects the temperature sensor to the circuit board. The positioning part includes an abutment wall that forms the positioning hole, and the abutment wall abuts against the side of the temperature measuring branch opposite to the temperature measuring part.

4. The battery module as described in claim 3, characterized in that, The isolation member has a mounting portion forming the temperature measuring hole, the mounting portion and the temperature measuring portion are at a first distance, and the mounting portion and the abutting wall are at a second distance, the second distance being less than the first distance.

5. The battery module as described in claim 4, characterized in that, The positioning part further includes a docking wall and a docking channel. The docking wall connects the abutment wall to the mounting part, and the docking channel is disposed on the docking wall and connects the temperature measuring hole and the positioning hole.

6. The battery module as described in claim 3, characterized in that, The temperature sensor includes a temperature measuring element and a positioning element. The temperature measuring element is electrically connected to the temperature measuring branch, and the positioning element surrounds the periphery of the temperature measuring element and is in clearance fit with the positioning hole.

7. The battery module as described in claim 2, characterized in that, The positioning part has at least one glue leakage hole, which is connected to the positioning hole.

8. The battery module as described in claim 2, characterized in that, The temperature sensor includes a positioning element, which has two glue leakage holes located on opposite sides of the positioning element.

9. The battery module as described in claim 3, characterized in that, The battery module also includes a connector that connects the temperature measuring branch to the temperature measuring part.

10. A battery pack, characterized in that, Includes the battery module as described in any one of claims 1-9.

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