Battery module

Abstract

The utility model provides a battery module, and relates to the technical field of new energy. The battery module provided by the utility model comprises a battery cell group, wherein the battery cell group comprises a plurality of battery cell monomers which are arranged in sequence; the busbar is arranged on the first side of the battery cell group and is electrically connected with the plurality of battery cell monomers; the circuit board is arranged on the first side of the battery cell group and is electrically connected with the busbar; the battery cell assembly comprises a busbar, a battery cell monomer, a pressing and clamping piece and a temperature acquisition piece, the pressing and clamping piece is clamped with the busbar, the temperature acquisition piece is pressed and clamped between the busbar and the battery cell monomer by the pressing and clamping piece, and the temperature acquisition piece is in contact with the battery cell monomer so as to acquire temperature information of the battery cell monomer. The battery module has the structure matching of the temperature acquisition assembly and the battery cell which are firmly connected, so that the temperature detection stability of the battery cell is relatively high.

Description

Technical Field

[0001] The present application relates to the field of new energy technology, and in particular to a battery module. Background Art

[0002] With the rapid development of the new energy industry, the performance improvement of battery modules has received widespread attention. In order to ensure the stable performance of the battery modules, the temperature of the battery cells in the battery modules needs to be monitored.

[0003] Accurate battery cell temperature detection is crucial to stable performance. Currently, related technologies use temperature sensors attached to the battery cells to directly detect the temperature of the battery cells. However, the connection between the temperature sensors and the battery cells in these technologies is not stable enough, which affects the accuracy of temperature detection. Utility Model Content

[0004] The present application provides a battery module having a firmly connected temperature acquisition component and a structural coordination of a battery cell, so that the temperature detection stability of the battery cell is high.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] The present application provides a battery module, comprising:

[0007] A battery cell group, comprising a plurality of battery cell units arranged in sequence;

[0008] A busbar is provided on the first side of the battery cell group and is electrically connected to the plurality of battery cell units;

[0009] a circuit board, disposed on a first side of the battery cell group and electrically connected to the busbar;

[0010] A pressing member and a temperature collecting member, wherein the pressing member is clamped with the bus bar, the temperature collecting member is pressed by the pressing member between the bus bar and the battery cell, and the temperature collecting member is in contact with the battery cell to obtain temperature information of the battery cell.

[0011] In a possible implementation, the pressing member includes a clamping portion and a crimping portion connected to each other, the busbar is provided with a bayonet, the clamping portion is clamped in the bayonet, and the crimping portion is pressed against the battery cell by the busbar.

[0012] In one possible implementation, the locking portion has a first limiting rib, and the locking port includes a locking slot. Along the first direction, the locking slot faces the central groove of the bus, and the first limiting rib is locked in the locking slot. The locking slot is constructed to limit the movement of the first limiting rib along the second direction, and the second direction is orthogonal to the first direction.

[0013] In a possible implementation, a protrusion is provided on the first limiting rib of the locking portion, the protrusion protruding toward the side away from the crimping portion, and the protrusion is configured to abut against the busbar to limit the movement range of the busbar toward the battery cell.

[0014] In a possible implementation, an observation hole is provided on the crimping portion, and the bayonet further includes an avoidance opening, wherein the avoidance opening is used to avoid the observation hole so as to observe the temperature collecting component through the observation hole.

[0015] In a possible implementation, the crimping portion has a second limiting rib, the second limiting rib is located on a side of the observation hole away from the engaging portion, and the second limiting rib extends along the axial direction of the observation hole toward the side away from the crimping portion;

[0016] The bayonet also includes a notch, which connects the avoidance port and the outer side of the bus. The structure forming the notch includes a first side wall, which abuts against the second limiting rib, and the second limiting rib is used to limit the movement of the first side wall toward the locking portion.

[0017] In a possible implementation, the temperature collection component includes a temperature collection sheet and a thermal pad. The temperature collection sheet is pressed between the bus and the battery cell by the pressing component. The thermal pad is arranged between the battery cell and the temperature collection sheet and contacts the battery cell.

[0018] In a possible implementation, the thermal pad is an elastic member.

[0019] In a possible implementation, a thermal insulation pad is further included, and the thermal insulation pad is connected between the pressing part and the temperature collection piece along the thickness direction of the temperature collection piece.

[0020] In a possible implementation, a reinforcing plate is further included, and the reinforcing plate is arranged between the temperature collection piece and the thermal insulation pad along the thickness direction of the temperature collection piece.

[0021] The battery module provided by the embodiment of the present application has at least the following beneficial effects:

[0022] In this battery module, the temperature collection component is pressed between the bus and the battery cell of the battery group by using a pressing part, so that the temperature collection component is effectively limited and fixed, which is beneficial to the contact stability between the temperature collection component and the battery cell, and ensures the temperature detection stability and accuracy of the battery cell by the temperature collection component. The pressing structure is suitable for integrated trays of various structural forms and battery modules without trays. It is simple, reliable, and easy to operate, avoids the need to install additional fixing devices on the battery module, and has a low structural production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic diagram of the structure of a battery module provided in an embodiment of the present application;

[0025] Figure 2 for Figure 1 A partial cross-sectional view of a battery module;

[0026] Figure 3 for Figure 1 Schematic diagram of the structure of the circuit board of the battery module;

[0027] Figure 4 for Figure 1 Schematic diagram of the structure of the pressing part of the battery module;

[0028] Figure 5 A schematic structural diagram of the busbar of the battery module provided in an embodiment of the present application.

[0029] Description of reference numerals:

[0030] 100, battery cell group; 110, battery cell unit; 200, bus; 210, bayonet; 211, slot; 212, avoidance; 213, notch; 2131, first side wall; 2132, second side wall; 300, circuit board; 310, voltage collection terminal; 400, pressing part; 410, locking part; 411, first limiting rib; 4111, bump; 412, second limiting rib; 420, pressing part; 421, observation hole; 500, temperature collection part; 510, temperature collection sheet; 520, thermal pad; 600, thermal insulation pad; 700, reinforcement plate; 800, connector.

[0031] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0032] As described in the background technology, with the rapid development of the new energy industry, the performance improvement of battery modules has received widespread attention. In order to ensure the stable performance of the battery modules, the temperature of the battery cells in the battery modules needs to be monitored.

[0033] Accurate battery cell temperature detection is crucial to stable performance. Currently, related technologies use temperature sensors attached to the battery cells to directly detect the temperature of the battery cells. However, the connection between the temperature sensors and the battery cells in these technologies is not stable enough, which affects the accuracy of temperature detection.

[0034] In response to the above technical problems, an embodiment of the present application provides a battery module, in which a temperature collection component is pressed between a bus and a cell of a cell group by using a pressing part, so that the temperature collection component is effectively limited and fixed, which is beneficial to the contact stability between the temperature collection component and the cell, and ensures the temperature detection stability and accuracy of the cell by the temperature collection component. The pressing structure is suitable for integrated trays of various structural forms and battery modules without trays. It is simple, reliable, and easy to operate, avoids the installation of additional fixing devices on the battery module, and has a low structural production cost.

[0035] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0036] Combine Figures 1 to 5The battery module provided in an embodiment of the present application includes: a battery cell group 100, including a plurality of battery cell units 110 arranged in sequence; a bus bar 200, arranged on a first side of the battery cell group 100 and electrically connected to the plurality of battery cell units 110; a circuit board 300, arranged on a first side of the battery cell group 100 and electrically connected to the bus bar 200; a pressing part 400 and a temperature collecting part 500, the pressing part 400 being clamped with the bus bar 200, the temperature collecting part 500 being pressed between the bus bar 200 and the battery cell units 110 by the pressing part 400, and the temperature collecting part 500 being in contact with the battery cell units 110 for obtaining temperature information of the battery cell units 110.

[0037] In this way, the temperature collection component 500 is pressed between the bus 200 and the battery cell 110 of the battery cell group 100 by using the pressing component 400, so that the temperature collection component is effectively limited and fixed, which is beneficial to the contact stability between the temperature collection component 500 and the battery cell 110, and ensures the temperature detection stability and accuracy of the battery cell 110 by the temperature collection component 500. In addition, the pressing structure is suitable for integrated trays of various structural forms and battery modules without trays. It is simple, reliable, and easy to operate, avoids the need to install additional fixing devices on the battery module, and has a low structural production cost.

[0038] Furthermore, the circuit board 300 has multiple voltage collection terminals 310, and multiple voltage collection terminals 310 are distributed on opposite sides along the width direction of the circuit board 300, and the multiple voltage collection terminals 310 are arranged at intervals along the length direction of the circuit board 300. The bus 200 has multiple bus sections, and the multiple bus sections are distributed at intervals along the length direction of the bus 200. The multiple voltage collection terminals 310 are electrically connected to the multiple bus sections in a one-to-one correspondence. There is at least one pressing member 400, and the pressing member 400 is clamped to the bus section. Exemplarily, there can also be two or three pressing members 400. The voltage collection terminal 310 is used to monitor the voltage information of each battery cell 110 in the battery module in real time. The voltage information can be used to record and analyze the performance and health status of the battery module.

[0039] Exemplarily, the pressing part 400 is an injection molded part, and the thermal conductivity of the pressing part 400 is ≤0.3w / (mK). The structure is simple to manufacture, and the influence of the ambient heat energy away from the side of the battery cell 110 on the heat collection of the temperature collection piece 510 is reduced, thereby ensuring the accuracy of the acquisition of the temperature information of the battery cell.

[0040] In some embodiments, the pressing member 400 includes a connected snap-fit ​​portion 410 and a crimping portion 420 . The busbar 200 is provided with a snap-fit ​​port 210 . The snap-fit ​​portion 410 is snap-fitted to the snap-fit ​​port 210 . The crimping portion 420 is pressed against the battery cell 110 by the busbar 200 .

[0041] In some embodiments, the locking portion 410 has a first limiting rib 411, and the bayonet 210 includes a slot 211. Along the first direction, the slot 211 faces the central groove of the bus 200, and the first limiting rib 411 is locked in the slot 211. The slot 211 is constructed to limit the movement of the first limiting rib 411 along the second direction, and the second direction is orthogonal to the first direction. For example, the first direction is the width direction of the bus 200, and the second direction is the length direction of the bus 200.

[0042] In some embodiments, a protrusion 4111 is provided on the first limiting rib 411 of the locking portion 410, and the protrusion 4111 protrudes toward the side away from the crimping portion 420. The protrusion 4111 is configured to abut against the busbar 200 to limit the movement range of the busbar 200 toward the battery cell 110, thereby improving the locking stability of the clamping part 400 and the busbar 200.

[0043] In some embodiments, an observation hole 421 is provided on the crimping portion 420 , and the bayonet 210 further includes an escape hole 212 , which is used to avoid the observation hole 421 so as to observe the temperature collecting component 500 through the observation hole 421 .

[0044] In some embodiments, the crimping portion 420 has a second limiting rib 412, the second limiting rib 412 is located on the side of the observation hole 421 away from the engaging portion 410, and the second limiting rib 412 extends along the axial direction of the observation hole 421 toward the side away from the crimping portion 420; the bayonet 210 also includes a notch 213, the notch 213 connects the avoidance port 212 and the outer side of the bus 200, and the structure forming the notch 213 includes a first side wall 2131, the first side wall 2131 abuts against the second limiting rib 412, and the second limiting rib 412 extends along the axial direction of the observation hole 421 toward the side away from the crimping portion 420; The positioning ribs 412 are used to limit the movement of the first side wall 2131 toward the locking portion 410, further strengthening the locking stability of the clamping member 400 and the bus 200. Furthermore, the structure forming the notch 213 also includes a second side wall 2132. Along the length direction of the bus 200, the second side wall 2132 is opposite to the first side wall 2131. There are two second limiting ribs 412, and the two second limiting ribs 412 are arranged at intervals. The two are used to limit the first side wall 2131 and the second side wall 2132 respectively.

[0045] In some embodiments, the temperature collection member 500 includes a temperature collection sheet 510 and a thermal pad 520. The temperature collection sheet 510 is pressed between the bus 200 and the battery cell 110 by the pressing member 400. The thermal pad 520 is arranged between the battery cell 110 and the temperature collection sheet 510 and contacts the battery cell 110. Furthermore, the temperature collection sheet 510 is bonded to the thermal pad 520, and the thermal pad 520 is bonded to the battery cell 110. In this way, the thermal pad 520 transfers the temperature of the battery cell 110 to the temperature collection sheet 510, while avoiding direct contact between the battery cell 110 and the temperature collection sheet 510 to cause structural damage.

[0046] In some embodiments, the thermal pad 520 is an elastic member. In this way, the resilience of the thermal pad 520 can provide structural protection for the battery cell 110 and the temperature collection piece 510. When the battery module is subjected to external impact, the elastic thermal pad 520 can absorb the impact energy for the battery cell 110 and the temperature collection piece 510.

[0047] In some embodiments, a thermal insulation pad 600 is further included. The thermal insulation pad 600 is connected between the pressing member 400 and the temperature collection sheet 510 along the thickness direction of the temperature collection sheet 510 .

[0048] In some embodiments, a reinforcing plate 700 is included. The reinforcing plate 700 is arranged between the temperature collection sheet 510 and the thermal insulation pad 600 along the thickness direction of the temperature collection sheet 510. Exemplarily, the temperature collection sheet 510 and the thermal insulation pad 600 are respectively bonded to the two opposite sides of the reinforcing plate 700 along its own thickness direction, thereby providing further structural support for the temperature collection sheet 510 and the thermal insulation pad 600. In particular, the reinforcing plate 700 can protect the upper surface of the temperature collection sheet 510, and the reinforcing plate 700 is provided with a first observation hole, which is coaxial with the observation hole 421 of the pressing member 400 and is used to observe the status of the temperature collection sheet 510 and the thermal pad 520 from above, and to prevent the temperature of the bus 200 from interfering with the temperature collection sheet 510. Furthermore, the thermal conductivity coefficient of the reinforcing plate 700 is ≤0.3w / (mK).

[0049] Furthermore, the thermal insulation pad 600 has a second observation hole corresponding to the reinforcement plate 700, and the thermal conductivity of the thermal insulation pad 600 is ≤0.06w / (mK).

[0050] In more embodiments, a connector is provided at one end of the circuit board 300 along the length direction of the circuit board 300, and the connector is configured to be connected to an external control device for data exchange. Exemplarily, the connector is communicatively connected to a battery management system to obtain voltage, current and / or temperature information of the battery cell 110, so as to facilitate real-time monitoring and management of the battery module.

[0051] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0052] Furthermore, 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0053] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0054] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0055] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0056] It should be noted that phrases such as "one embodiment," "an embodiment," "exemplary embodiments," and "some embodiments" in this specification may indicate embodiments that may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery module, characterized in that: include: A battery cell group (100) includes a plurality of battery cell units (110) arranged in sequence; A busbar (200) is arranged on a first side of the battery cell group (100) and is electrically connected to the plurality of battery cell units (110); A circuit board (300) is disposed on a first side of the battery cell group (100) and is electrically connected to the busbar (200); A pressing member (400) and a temperature collecting member (500), wherein the pressing member (400) is clamped with the busbar (200), and the temperature collecting member (500) is pressed by the pressing member (400) between the busbar (200) and the battery cell (110), and the temperature collecting member (500) is in contact with the battery cell (110) to obtain temperature information of the battery cell (110).

2. The battery module according to claim 1, characterized in that: The clamping member (400) comprises a clamping portion (410) and a crimping portion (420) connected to each other; the busbar (200) is provided with a bayonet (210); the clamping portion (410) is clamped to the bayonet (210); and the crimping portion (420) is pressed against the battery cell (110) by the busbar (200).

3. The battery module according to claim 2, characterized in that: The engaging portion (410) has a first limiting rib (411), and the bayonet (210) includes a slot (211). Along a first direction, the slot (211) faces a central groove of the busbar (200), and the first limiting rib (411) is engaged in the slot (211). The slot (211) is configured to limit movement of the first limiting rib (411) along a second direction, and the second direction is orthogonal to the first direction.

4. The battery module according to claim 3, characterized in that: A protrusion (4111) is provided on the first limiting rib (411) of the engaging portion (410), the protrusion (4111) protruding toward a side away from the crimping portion (420), and the protrusion (4111) is configured to abut against the busbar (200) to limit the movement range of the busbar (200) toward the battery cell (110).

5. The battery module according to any one of claims 2 to 4, characterized in that: An observation hole (421) is provided on the crimping portion (420), and the bayonet (210) further comprises an avoidance opening (212), wherein the avoidance opening (212) is used to avoid the observation hole (421) so as to observe the temperature collecting component (500) through the observation hole (421).

6. The battery module according to claim 5, characterized in that: The crimping portion (420) has a second limiting rib (412), the second limiting rib (412) is located on a side of the observation hole (421) away from the engaging portion (410), and the second limiting rib (412) extends along the axial direction of the observation hole (421) toward a side away from the crimping portion (420); The bayonet (210) further comprises a notch (213), wherein the notch (213) communicates with the avoidance opening (212) and the outer side of the busbar (200), and the structure forming the notch (213) comprises a first side wall (2131), wherein the first side wall (2131) abuts against the second limiting rib (412), and the second limiting rib (412) is used to limit the movement of the first side wall (2131) toward the engaging portion (410).

7. The battery module according to any one of claims 1 to 4, characterized in that: The temperature collection component (500) comprises a temperature collection sheet (510) and a thermal pad (520); the temperature collection sheet (510) is pressed between the busbar (200) and the battery cell (110) by the pressing component (400); and the thermal pad (520) is arranged between the battery cell (110) and the temperature collection sheet (510) and is in contact with the battery cell (110).

8. The battery module according to claim 7, characterized in that: The thermal pad (520) is an elastic member.

9. The battery module according to claim 8, characterized in that: It also includes a heat insulation pad (600), which is connected between the pressing piece (400) and the temperature collection piece (510) along the thickness direction of the temperature collection piece (510).

10. The battery module according to claim 9, characterized in that: It also includes a reinforcing plate (700), which is arranged between the temperature collection piece (510) and the thermal insulation pad (600) along the thickness direction of the temperature collection piece (510).

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